CN109779776A - Electronic control system and internal-combustion engine variable injection pressure control method - Google Patents
Electronic control system and internal-combustion engine variable injection pressure control method Download PDFInfo
- Publication number
- CN109779776A CN109779776A CN201810806426.4A CN201810806426A CN109779776A CN 109779776 A CN109779776 A CN 109779776A CN 201810806426 A CN201810806426 A CN 201810806426A CN 109779776 A CN109779776 A CN 109779776A
- Authority
- CN
- China
- Prior art keywords
- injection pressure
- combustion engine
- current
- pressure control
- internal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The present invention provides a kind of electronic control system and internal-combustion engine variable injection pressure control method, the internal-combustion engine variable injection pressure control method internal-combustion engine variable injection pressure control method includes: that the working stage of parameter acquisition module acquisition Current internal combustion engines judges parameter and current working phase affecting parameters；Stage judgment module judges that parameter judges the current working phase of Current internal combustion engines according to the working stage；Injection pressure control module is stored in corresponding target injection pressure list in memory module according to current working phase calling, it presses list and the current working phase affecting parameters to determine target injection pressure value according to the target oil spout, and current injection pressure is adjusted to target injection pressure value.The control method can carry out the adjustment of injection pressure based on the real-time working condition of internal combustion engine, it is ensured that optimal each gaseous state object discharge, emission meet discharge relevant regulations.
Description
Technical field
The present invention relates to automotive engine control field more particularly to a kind of electronic control system and internal-combustion engine variable oil spouts
Compress control method.
Background technique
The system injection pressure of conventional gas introduction road injected petrol engine PFI (PortFuel Injection) is according to pressure regulation
Valve and limit and each operating condition remains unchanged.The jet pressure that oil pump can persistently deliver fuel into oily rail to maintain fuel injector basic
Power, this single fuel feeding fuel injection mode cannot achieve injection pressure with the real-time change of operating condition.
Five emission regulation of state only has gaseous pollutant limitation, and new European Driving Cycle (NEDC) phase for PFI engine
The requirement that PFI engine meets five emission regulation of state is not interfered with to steady, traditional constant pressure jet mode.However,
Six emission regulation of state starts to implement comprehensively after the year two thousand twenty, the state that will be implemented compared to five emission regulation of state before, future
Six regulations have the characteristics that several protrusions: 1. either PFI engine or in-cylinder direct-jet (GDI) engine increase to
The requirement of grain amount of substance (PM) and particulate matter quantity (particulate matter quantity), this variation, which improves, controls PFI engine system
With the requirement of performance, the difficulty of system development is increased；2. Emission test cycle is no longer recycled using more gentle NEDC, change
Unify driving cycle WLTC (Worldwide harmonized Light vehicles for more dynamic global Light-duty Vehicle
Test Cycle), and real vehicle road emission test RDE (RealDriving Emission) survey is also added on this basis
The variation of examination and limit value requirement, the above experimental enviroment is difficult by the control for undoubtedly further increasing gaseous state and granular material discharged object
Degree.In addition to this, the characteristics of PFI engine is relative to GDI engine is more simple in terms of exhaust system control means and single
One is some.Therefore, above these analyzed internal and external factors undoubtedly make upcoming six emission regulation demands of state for
It is still a huge challenge for traditional PFI engine.
Under such environment and background, change the constant pressure fuel injection control strategy of the original single stable of PFI engine, for
Actual discharge performance under different operating conditions can be changed to injection pressure and real-time regulation and control, using flexible pressure control
System strategy optimizes discharging pollutants to achieve the purpose that control various emissions under Different Dynamic operating condition to take into account, and meets increasingly
Harsh six emission regulation demands of state.By a series of research shows that: can be changed injection pressure control strategy for PFI engine
For be effective one of to solve emission problem, meet the most important system control strategy of six regulation of state.
The current PFI engine system control strategy still not existing, perfect for continuous variable oil pressure cntrol.
Summary of the invention
An object of the present invention solves the real-time change that single fuel feeding fuel injection mode cannot achieve injection pressure with operating condition
The technical issues of changing adjustment.
In order to solve the above technical problems, the present invention provides a kind of electronic control systems, comprising:
Memory module, for storing the target injection pressure list of each working stage of internal combustion engine, the target oil spout pressure
Power list is the table of the corresponding relationship about working stage affecting parameters Yu target injection pressure value, and the working stage includes cold
Startup stage, warm-up period and warm up phase；
Parameter acquisition module, the working stage for obtaining Current internal combustion engines judge that parameter and current working phase influence ginseng
Number；
Stage judgment module, for judging that parameter judges the work at present rank of Current internal combustion engines according to the working stage
Section；
Injection pressure control module, for calling corresponding target in the memory module according to the current working phase
Injection pressure list determines target injection pressure value according to the current working phase affecting parameters, and by current injection pressure
It is adjusted to target injection pressure value.
Optionally, in the electronic control system, the working stage judges parameter for internal-combustion engine rotational speed and internal combustion engine
Coolant temperature.
Optionally, in the electronic control system, the course of work of the stage judgment module is as follows:
Internal-combustion engine rotational speed threshold values when whether internal-combustion engine rotational speed is less than startup stage is judged, if so, determining work at present rank
Section is cold-start phase；If it is not, then judge whether Current internal combustion engines coolant temperature is in operating temperature section, if being in,
Current working phase is judged for warm up phase, if being not at, judges current working phase for warm-up period.
Optionally, in the electronic control system, when the working stage of internal combustion engine is cold-start phase, working stage shadow
Ring parameter are as follows: cooling liquid of IC engine temperature when starting；
When the working stage of internal combustion engine is warm-up period, working stage affecting parameters are as follows: cooling liquid of IC engine temperature when starting
Degree, catalyst converter heated condition signal, internal-combustion engine rotational speed, engine load and internal combustion engine oil spout round signal；
When the working stage of internal combustion engine is warm up phase, working stage affecting parameters are as follows: internal-combustion engine rotational speed and internal combustion engine are negative
Lotus.
Optionally, in the electronic control system, the injection pressure control module includes correction module, is used for basis
The modifying factor of the current working phase corrects the target injection pressure value of the current working phase.
Optionally, in the electronic control system, when the current working phase is cold-start phase or warm up phase,
The modifying factor is height above sea level signal and intake air temperature signals；
The current working phase be warm-up period when, the modifying factor be height above sea level signal, intake air temperature signals and
Cooling liquid of IC engine temperature signal.
Optionally, in the electronic control system, the injection pressure control module further includes limitation module, for limiting
Make the bound of the target injection pressure value of the current working phase and the variable gradient of target injection pressure value.
The present invention also provides a kind of internal-combustion engine variable injection pressure control methods, include the following steps:
S1: the working stage that parameter acquisition module obtains Current internal combustion engines judges that parameter and current working phase influence ginseng
Number；
S2: stage judgment module judges that parameter judges the current working phase of Current internal combustion engines according to the working stage；
S3: injection pressure control module is stored in corresponding target in memory module according to current working phase calling
Injection pressure list presses list and the current working phase affecting parameters to determine target injection pressure according to the target oil spout
Value, and current injection pressure is adjusted to target injection pressure value.
Optionally, in the internal-combustion engine variable injection pressure control method, the working stage judges parameter for internal combustion
Machine revolving speed and cooling liquid of IC engine temperature, S2 include the following steps:
Internal-combustion engine rotational speed threshold values when whether internal-combustion engine rotational speed is less than startup stage is judged, if so, determining work at present rank
Section is cold-start phase；If it is not, then judge whether Current internal combustion engines coolant temperature is in operating temperature section, if being in,
Current working phase is judged for warm up phase, if being not at, judges current working phase for warm-up period.
Optionally, in the internal-combustion engine variable injection pressure control method, in S3, according to the work at present rank
After section affecting parameters determine target injection pressure value, before current injection pressure is adjusted to target injection pressure value, also wrap
Include following steps:
The work at present rank is corrected according to the modifying factor of the current working phase using injection pressure control module
Section target injection pressure value, and/or using injection pressure control module limit the target injection pressure value bound and
The variable gradient of target injection pressure value.
Optionally, in the internal-combustion engine variable injection pressure control method, current working phase be cold-start phase or
When warm up phase, the modifying factor is height above sea level signal and intake air temperature signals；
The current working phase be warm-up period when, the modifying factor be height above sea level signal, intake air temperature signals and
Cooling liquid of IC engine temperature signal.
Optionally, in the internal-combustion engine variable injection pressure control method, when current working phase is cold-start phase,
Injection pressure control model includes constant target pressure control mode and maximum injection pressure mode；Wherein, the constant target
Under pressure control mode, current injection pressure is adjusted to the target injection pressure value by injection pressure control module；It is described most
Under big injection pressure mode, current injection pressure is adjusted to internal combustion engine pressure regulator valve maximum pressure value.
Optionally, in the internal-combustion engine variable injection pressure control method, the injection pressure control model was run
Journey includes the following steps:
According to comprehensive assessment start safety and starting discharge performance as a result, selection constant target pressure control mode or
Maximum injection pressure mode.
Optionally, in the internal-combustion engine variable injection pressure control method, when current working phase is that warming-up moves the stage,
Injection pressure control model includes constant target pressure control mode and dynamic object pressure control mode；
Wherein, under the constant target pressure control mode, internal combustion engine when current working phase affecting parameters are starting
Current injection pressure is adjusted to corresponding target injection pressure value by coolant temperature, the injection pressure control module；
Under the dynamic object pressure control mode, current working phase affecting parameters are internal-combustion engine rotational speed and internal combustion engine
Current injection pressure is adjusted to corresponding target injection pressure value by load, the injection pressure control module.
Optionally, in the internal-combustion engine variable injection pressure control method, in the constant target pressure control mode
Under, before current injection pressure is adjusted to corresponding target injection pressure value by the injection pressure control module, including such as
Lower step:
Judge whether Current Temperatures are lower than 0 DEG C according to internal combustion engine start moment coolant temperature, if so, obtaining current
Internal combustion engine oil spout round and internal combustion engine start moment coolant temperature, and multiplication modifying factor is calculated as presently described target pressure
The correction factor of force value corrects the target pressure value with segmentation, and current injection pressure is adjusted to be segmented revised mesh
Mark injection pressure value；If it is not, current injection pressure is directly then adjusted to corresponding target injection pressure value.
Optionally, in the internal-combustion engine variable injection pressure control method, in the constant target pressure control mode
Under, before current injection pressure is adjusted to corresponding target injection pressure value by the injection pressure control module, further include as
Lower step:
Judge whether current catalyst converter is in heated condition, if so, needing in conjunction with the catalyst converter to internal combustion engine operation
The impact factor of state is modified target injection pressure value, and current injection pressure is adjusted to revised target oil spout
Pressure value；If it is not, current injection pressure is directly then adjusted to corresponding target injection pressure value.
Optionally, in the internal-combustion engine variable injection pressure control method, current working phase is warm-up period, currently
When catalyst converter is in heated condition or non-heated state, constant target pressure control mode and dynamic object pressure control mode it
Between handoff procedure it is as follows:
Switching time threshold values is set, and the timing since the internal combustion engine start；
Start in internal combustion engine start between the time threshold, using constant target pressure control mode；
When internal combustion engine is started to up to the time threshold, starts filtering and calculate to switch to dynamic object pressure control mould
Formula.
Optionally, in the internal-combustion engine variable injection pressure control method, when current working phase is warm up phase, institute
The control model for stating injection pressure control module includes dynamic object pressure control mode；
Under dynamic object pressure control mode, current working phase affecting parameters are that internal-combustion engine rotational speed and internal combustion engine are negative
Current injection pressure is adjusted to corresponding target injection pressure value by lotus, the injection pressure control module.
Scheme provided by the invention can realize that PFI gasoline engine can be changed oil pressure EFI function, changed based on operating condition and arranged
Put the requirement of control, can in time, it is accurate and neatly make injection pressure control, effectively prevent because spray pressure it is excessive due to lead
The intake valve " wet wall effect " of cause reduces PN discharge, while having taken into account optimal fuel atomization effect under each operating condition again, guarantees most
Excellent each gaseous state object discharge, is conducive to PFI electric injection system and meets state six and later emission regulation demands.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of electronic control system in one embodiment of the invention；
Fig. 2 is the flow chart of internal-combustion engine variable injection pressure control method in one embodiment of the invention；
Fig. 3 is the functional block diagram of internal-combustion engine variable injection pressure control method in one embodiment of the invention.
In figure: 10- parameter acquisition module；11- stage judgment module；12- injection pressure control module；13- memory module.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to electronic control system proposed by the present invention and internal-combustion engine variable oil spout pressure
Force control method is described in further detail.According to following explanation and claims, advantages and features of the invention will be more clear
Chu.It should be noted that attached drawing is all made of very simplified form and using non-accurate ratio, only to conveniently, lucidly
Aid in illustrating the purpose of the embodiment of the present invention.
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that diagram provided in the present embodiment is only with signal
Mode illustrates basic conception of the invention, then in schema only display with related component in the present invention rather than when according to actual implementation
Component count, shape and size draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind
Become, and its assembly layout kenel may also be increasingly complex.
The certain terms for indicating particular system components have been used throughout specification and claims.Such as the technology of this field
What personnel will be understood that, different company may indicate a component with different titles.But function different in title is not expected herein
It is distinguished between identical component.In the specification and in the claims, term " includes " and "comprising" press open side
Formula uses, and therefore should be interpreted " including, but are not limited to ... ".
As shown in the application and claims, unless context clearly prompts exceptional situation, " one ", "one", " one
The words such as kind " and/or "the" not refer in particular to odd number, may also comprise plural number.It is, in general, that term " includes " only prompts to wrap with "comprising"
Include clearly identify the step of and element, and these steps and element do not constitute one it is exclusive enumerate, method or apparatus
The step of may also including other or element.
In addition, each embodiment of following description is respectively provided with one or more technical characteristics, so this is not meant to
It must implement all technical characteristics in any embodiment simultaneously using present inventor, or be only capable of being performed separately in different embodiments
One or all technical characteristic.In other words, under the premise of being embodied as possible, those skilled in the art can be according to the present invention
Disclosure, and regard design specification or implementation demand, it is special selectively to implement all or part of technology in any embodiment
Sign, or selectively implement the combination of all or part of technical characteristic in multiple embodiments, increase the present invention whereby and implements
When elasticity.
To be clearer and more comprehensible the purpose of the present invention, feature, a specific embodiment of the invention is made with reference to the accompanying drawing
Further instruction, however, the present invention can be realized with different forms, it is not considered that being only confined to the embodiment described.
Embodiment one
Referring to FIG. 1, its structural schematic diagram for electronic control system in the present embodiment.As shown in Figure 1, the electronics control
System processed includes: memory module 13, parameter acquisition module 10, stage judgment module 11 and injection pressure control module 12, institute
Memory module 13 is stated for storing the target injection pressure list of each working stage of internal combustion engine, the target injection pressure list
It is the table of the corresponding relationship about working stage affecting parameters Yu target injection pressure value, the working stage includes cold start-up rank
Section, warm-up period and warm up phase；The parameter acquisition module 10 is used to obtain the working stage judgement ginseng of Current internal combustion engines
Several and current working phase affecting parameters；The stage judgment module 11 is used to judge according to the working stage that parameter judgement to be worked as
The current working phase of preceding internal combustion engine；The injection pressure control module 12 is used for according to current working phase calling
Corresponding target injection pressure list in memory module 13 determines target oil spout pressure according to the current working phase affecting parameters
Force value, and current injection pressure is adjusted to target injection pressure value.
It is described in detail below with reference to the electronic control system of diagram offer described in the present embodiment.It needs to illustrate
It is, it should be understood that the division of the modules of electronic control system is only a kind of division of logic function, in actual implementation can be with
Completely or partially it is integrated on a physical entity, it can also be physically separate.And these modules can all be passed through with software
The form that processing element calls is realized；It can also all realize in the form of hardware；Processing element can be passed through with part of module
The form of software is called to realize that part of module passes through formal implementation of hardware.For example, x module can be the processing individually set up
Element also can integrate and realize in some chip of above-mentioned apparatus, in addition it is also possible to be stored in the form of program code
In the memory of above-mentioned apparatus, the function of following x module is called by some processing element of above-mentioned apparatus and executed.Other moulds
The realization of block is similar therewith.Furthermore these modules completely or partially can integrate together, can also independently realize.It is described here
Processing element can be a kind of integrated circuit, with signal processing capacity.During realization, each step of the above method
Or following modules can be completed by the integrated logic circuit of the hardware in processor elements or the instruction of software form.
Wherein, the working stage judges parameter for internal-combustion engine rotational speed and cooling liquid of IC engine temperature, and the stage judges
The course of work of module 11 is as follows:
Internal-combustion engine rotational speed threshold values when whether internal-combustion engine rotational speed is less than startup stage is judged, if so, determining work at present rank
Section is cold-start phase；If it is not, then judge whether Current internal combustion engines coolant temperature is in operating temperature section, if being in,
Current working phase is judged for warm up phase, if being not at, judges current working phase for warm-up period.
In the present embodiment, when the working stage of internal combustion engine is cold-start phase, working stage affecting parameters are as follows: interior when starting
Combustion engine coolant temperature；When the working stage of internal combustion engine is warm-up period, working stage affecting parameters are as follows: internal combustion engine is cold when starting
But liquid temperature, catalyst converter heated condition signal, internal-combustion engine rotational speed, engine load and internal combustion engine oil spout round signal；Internal combustion
When the working stage of machine is warm up phase, working stage affecting parameters are as follows: internal-combustion engine rotational speed and engine load.I.e. to internal combustion engine
Each working stage, be corresponding with corresponding work influence parameter, according to work influence parameter setting target injection pressure value, from
And the target injection pressure list of each working stage of internal combustion engine is established, the target injection pressure value set here is by research and development
Personnel's long-time many experiments, the optimal selection that situations such as taking into account pollutant emission situation and oil consumption makes, according to the target
Injection pressure value carries out the injection of fuel oil, improves atomization and the combustion state of fuel oil, reduces the discharge amount of pollutant.
Preferably, the injection pressure control module 12 includes correction module, correction module is according to the work at present rank
The modifying factor of section corrects the target injection pressure value of the current working phase, to reduce because varying environment is to the mist of fuel oil
It is influenced caused by change and combustion state.Wherein, when the current working phase is cold-start phase or warm up phase, the amendment
The factor is height above sea level signal and intake air temperature signals；When the current working phase is warm-up period, the modifying factor is height above sea level
Signal, intake air temperature signals and cooling liquid of IC engine temperature signal.
Further, the injection pressure control module 12 further includes limitation module, for limiting the work at present rank
The bound of the target injection pressure value of section and the variable gradient of target injection pressure value.The bound of target injection pressure value
Limitation function is related to the setting of maximum safe rail pressure setting and minimum safe rail pressure, on the one hand considers that components can bear most
Big pressure, protection components, be on the other hand in order to prevent because low pressure fuel pump pressure too it is low cause vehicle for shortage of oil due to stop working.
The variable gradient limitation function of target injection pressure is for preventing low pressure oil way pressure oscillation excessive and the spray of transient process fuel oil
The amount of penetrating is inaccurate, need to limit low pressure oil way pressure change slope.
Embodiment two
Referring to FIG. 2, its flow chart for internal-combustion engine variable injection pressure control method in the present embodiment.As shown in Fig. 2,
The internal-combustion engine variable injection pressure control method uses electronic control system as described above, and the internal combustion engine is by making fuel
In machine internal-combustion, and the thermal energy released is converted directly into the heating power internal combustion engine of power, the internal-combustion engine variable oil spout
Compress control method mainly includes the following steps:
Firstly, executing step S1: the working stage that parameter acquisition module obtains Current internal combustion engines judges parameter and current work
Make effect stepwise parameter；
Then, execute step S2: stage judgment module judges that parameter judges Current internal combustion engines according to the working stage
Current working phase；Preferably, the working stage judges parameter for internal-combustion engine rotational speed and cooling liquid of IC engine temperature, and S2 includes
Following steps: judging internal-combustion engine rotational speed threshold values when whether internal-combustion engine rotational speed is less than startup stage, if so, determining work at present rank
Section is cold-start phase；If it is not, then judge whether Current internal combustion engines coolant temperature is in operating temperature section, if being in,
Current working phase is judged for warm up phase, if being not at, judges current working phase for warm-up period.
Then, execute step S3: injection pressure control module is stored in storage mould according to current working phase calling
Corresponding target injection pressure list in block presses list and the current working phase affecting parameters true according to the target oil spout
Set the goal injection pressure value, and current injection pressure is adjusted to target injection pressure value.
It using above-mentioned fuel injection control method, changes and uses single constant injection pressure mode in the prior art, lead to
It crosses and obtains working stage and current working phase affecting parameters locating for Current internal combustion engines, adjustment injection pressure to corresponding target
Injection pressure value, takes into account discharge and oil consumption, and optimal objective under each duty parameter (i.e. current working phase affecting parameters) is selected to spray
Oil pressure has reached the purpose for taking into account discharge, oil consumption and internal combustion engine operation stability.
Preferably, will currently be sprayed after determining target injection pressure value according to the current working phase affecting parameters
Oil pressure is adjusted to before target injection pressure value, further includes following steps:
The work at present rank is corrected according to the modifying factor of the current working phase using injection pressure control module
Section target injection pressure value, and/or using injection pressure control module limit the target injection pressure value bound and
The variable gradient of target injection pressure value.To improve the precision of the target injection pressure value, there is universality.
In order to which more flexibly the injection pressure of control internal combustion engine, the setting for each stage of internal combustion engine are sprayed accordingly
Oil pressure force control mode, to take into account the difference under different operating conditions, it is ensured that the discharge of pollutant is also effectively reduced while safety
Amount.
Specifically, referring to FIG. 3, it is the functional block diagram of internal-combustion engine variable injection pressure control method.As shown in figure 3,
When current working phase is cold-start phase, injection pressure control model includes constant target pressure control mode and maximum oil spout
Pressure pattern；Wherein, under the constant target pressure control mode, current injection pressure is adjusted to by injection pressure control module
The target injection pressure value；Under the maximum injection pressure mode, current injection pressure is adjusted to internal combustion engine pressure regulator valve most
Big pressure value.
For being selection operation constant target pressure control mould in cold-start phase, in the injection pressure control model
Formula, or the process of maximum injection pressure mode are as follows:
Specific choice is to start the result that safety and starting discharge show according to comprehensive assessment to be selected.In general, spray
Oil pressure then starts greatly highly-safe, but injection pressure will cause greatly the wet wall phenomenon of internal combustion engine, and pollutant discharge amount can increase.This
Invention carries out in selection course, primary to guarantee starting safety (with the injection of larger injection pressure), considers further that starting discharge.It is maximum
Injection pressure mode once enable, then all start-up temperature points be all spray to start internal combustion engine with maximum injection pressure, if
Each start-up temperature point emission result is also all normal, then can enable maximum injection pressure mode.Constant target pressure control mode can
It, must if the discharge of certain start-up temperatures point does not pass through target injection pressure is set separately according to different start-up temperature points
Discharge must be optimized using this flexible control model.Specific choosing for injection pressure control model in cold-start phase
It selects, subjectivity selection is stronger, and nonsystematic judges automatically and the control logic that switches.
When using maximum injection pressure mode, pressure regulator valve limits the variable control of injection pressure under pressure, maximum spout oil pressure
System maximum injection pressure injection (opened loop control) can be used in force mode injection pressure of lower startup stage, guarantees that injection pressure can rush
Pressure regulator valve is opened, guarantees internal combustion engine with the permitted maximum injection pressure clean boot of system.In each internal combustion engine low pressure oil supply road
Pressure regulator valve will be housed, specification is differed in 3.5~6bar or specification pressure is higher.The cold-start phase time is very short, 20 DEG C with
The upper starting time does not exceed 3s, with the reduction of starting water temperature, under extremely low temperature (subzero 35 DEG C) generally in 3~8s, usually
In the case of have a large amount of pollutants and generate.Lower injection pressure is unfavorable for fuel-oil atmozation, spray penetration from and spray cone angle
Increase, a possibility that higher injection pressure adds somewhat to wet wall with the increase of injection pressure, at low temperature
The oil film attachment on air intake duct wall surface and intake valve is easily aggravated, unburned fuel oil can be discharged in the form of HC pollutant.Therefore, permanent
The pressure control mode that sets the goal can be very good to control the stage emission.When using constant target pressure control mode, can divide
Different Startup time water temperatures section, selects the target injection pressure value of suitable startup stage according to actual discharge control.
Current working phase be warming-up move the stage when, injection pressure control model include constant target pressure control mode and
The difference of dynamic object pressure control mode, two kinds of control models is the difference of working stage affecting parameters；Wherein, described
Under constant target pressure control mode, cooling liquid of IC engine temperature when current working phase affecting parameters are starting, the oil spout
Current injection pressure is adjusted to corresponding target injection pressure value by pressure control module；Mould is controlled in the dynamic object pressure
Under formula, current working phase affecting parameters are internal-combustion engine rotational speed and engine load, and the injection pressure control module will be current
Injection pressure is adjusted to corresponding target injection pressure value.
Preferably, will currently be sprayed when current working phase is in the warm-up period in the injection pressure control module
Before oil pressure is adjusted to corresponding target injection pressure value, it is preferred that also need to the mesh determined in target injection pressure list
Mark injection pressure value carries out modified twice: 1) needing to combine catalyst converter heated condition signal acquisition catalyst converter state in which, choosing
It selects and whether needs further to correct target injection pressure value；2) current temperature is judged according to internal combustion engine start moment coolant temperature
Whether degree is lower than 0 DEG C, chooses whether to need further to be segmented amendment target injection pressure value.
For process step specific as follows 1): judging whether current catalyst converter is in heated condition, if so, needing to tie
It closes the catalyst converter to be modified target injection pressure value the impact factor of engine operating conditions, and by current oil spout pressure
Power is adjusted to revised target injection pressure value；If it is not, current injection pressure is directly then adjusted to corresponding target oil spout
Pressure value.
For process step specific as follows 2): being to judge Current Temperatures according to internal combustion engine start moment coolant temperature
It is no to be lower than 0 DEG C, if so, obtaining Current internal combustion engines oil spout round and internal combustion engine start moment coolant temperature, and calculate multiplication
Correction factor of the modifying factor as presently described target pressure value is corrected the target pressure value with segmentation, and will currently be sprayed
Oil pressure is adjusted to be segmented revised target injection pressure value, to realize that constant pressure sectional injection controls after starting；If it is not, then
Current injection pressure is directly adjusted to corresponding target injection pressure value (i.e. without being segmented amendment).
Current working phase is warm-up period, can be simultaneous by this modified twice under constant target pressure control mode
The balance for reducing pollutant emission and guaranteeing starting safety is cared for, neatly injection pressure after selection starting, is opened to realize
Fuel oil injection is carried out with a certain fixation pressure value in specific time after dynamic, under catalyst converter heated condition can with optimal startup after urge
Change device heating idling operation to discharge pollutants.
Current working phase is warm-up period, can be simultaneous by this modified twice under dynamic object pressure control mode
It cares for reduction pollutant emission and oil consumption, injection pressure is combined with variation (distributive value, point of each operating condition relevant parameter of internal combustion engine in real time
Fiery angle, oil spout phase and VVT angle etc.), realize that internal combustion engine fuel oil under each operating condition reaches optimal fuel-oil atmozation and combustion
Burning state optimizes and discharges pollutants caused by vehicle dynamic operation condition.
It is warm-up period for current working phase, and the current catalyst converter is in heated condition or non-heated state
When, it include constant target pressure control mode and dynamic object pressure control mode.
When current catalyst converter is in heated condition or non-heated state, constant target pressure control mode and dynamic can be related to
The necessity of switching between goal pressure control model, switching embodies are as follows: as internal combustion engine is constantly run, engine conditions meeting
Real-time transform is likely to occur internal-combustion engine rotational speed normally but pollutant is arranged if using constant target pressure control mode always
High-volume, the undesirable situation of oil consumption, it is therefore desirable to be switched to dynamic object pressure control mode to improve the present situation, instead
?.
Wherein, the handoff procedure between constant target pressure control mode and dynamic object pressure control mode is as follows: setting
Determine switching time threshold values, and the timing since the internal combustion engine start；Start in internal combustion engine start between the time threshold, adopts
With constant target pressure control mode；When internal combustion engine is started to up to the time threshold, start filtering calculate it is dynamic to switch to
State goal pressure control model.For example, catalyst converter is in heated condition, if time threshold is set as 0, after starting directly into
Enter dynamic object pressure control mode；If time threshold is set as t, the control of constant target pressure is used after starting in the t time
Molding formula, t moment triggering filtering calculate, and gently switch to dynamic object pressure control mode, filtering time is according to actual fuel injection
Depending on pressure performance.
When current working phase is warm up phase, the control model of the injection pressure control module includes dynamic object pressure
Force control mode；Under dynamic object pressure control mode, current working phase affecting parameters are internal-combustion engine rotational speed and internal combustion engine
Current injection pressure is adjusted to corresponding target injection pressure value by load, the injection pressure control module.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.In disclosed in embodiment two
For combustion engine can be changed injection pressure control method, as being using electronic control system disclosed in embodiment one, so description
It is fairly simple, related place illustrates referring to embodiment a part.
To sum up, described the present invention provides in a kind of electronic control system and internal-combustion engine variable injection pressure control method
Internal-combustion engine variable injection pressure control method internal-combustion engine variable injection pressure control method includes: that parameter acquisition module obtains currently
The working stage of internal combustion engine judges parameter and current working phase affecting parameters；Stage judgment module is sentenced according to the working stage
Disconnected parameter judges the current working phase of Current internal combustion engines；Injection pressure control module is deposited according to current working phase calling
It is stored in corresponding target injection pressure list in memory module, list and the current working phase are pressed according to the target oil spout
Affecting parameters determine target injection pressure value, and current injection pressure is adjusted to target injection pressure value.The control method energy
Enough real-time working conditions based on internal combustion engine carry out the adjustment of injection pressure, it is ensured that optimal each gaseous state object discharge, emission meet row
Put relevant regulations.
Obviously, those skilled in the art can carry out various modification and variations without departing from spirit of the invention to invention
And range.If in this way, these modifications and changes of the present invention belong to the claims in the present invention and its equivalent technologies range it
Interior, then the present invention is also intended to include these modifications and variations.
Claims (18)
1. a kind of electronic control system characterized by comprising
Memory module, for storing the target injection pressure list of each working stage of internal combustion engine, the target injection pressure column
Table is the table of the corresponding relationship about working stage affecting parameters Yu target injection pressure value, and the working stage includes cold start-up
Stage, warm-up period and warm up phase；
Parameter acquisition module, the working stage for obtaining Current internal combustion engines judge parameter and current working phase affecting parameters；
Stage judgment module, for judging that parameter judges the current working phase of Current internal combustion engines according to the working stage；
Injection pressure control module, for calling corresponding target oil spout in the memory module according to the current working phase
Pressure list determines target injection pressure value according to the current working phase affecting parameters, and current injection pressure is adjusted
To target injection pressure value.
2. electronic control system according to claim 1, which is characterized in that the working stage judges parameter for internal combustion engine
Revolving speed and cooling liquid of IC engine temperature.
3. electronic control system according to claim 2, which is characterized in that the course of work of the stage judgment module is such as
Under:
Internal-combustion engine rotational speed threshold values when whether internal-combustion engine rotational speed is less than startup stage is judged, if so, determining that current working phase is
Cold-start phase；If it is not, then judging whether Current internal combustion engines coolant temperature is in operating temperature section, if being in, judge
Current working phase is warm up phase, if being not at, judges current working phase for warm-up period.
4. electronic control system according to claim 1, which is characterized in that the working stage of internal combustion engine is cold-start phase
When, working stage affecting parameters are as follows: cooling liquid of IC engine temperature when starting；
When the working stage of internal combustion engine is warm-up period, working stage affecting parameters are as follows: cooling liquid of IC engine temperature when starting is urged
Change device heated condition signal, internal-combustion engine rotational speed, engine load and internal combustion engine oil spout round signal；
When the working stage of internal combustion engine is warm up phase, working stage affecting parameters are as follows: internal-combustion engine rotational speed and engine load.
5. electronic control system according to claim 1, which is characterized in that the injection pressure control module includes amendment
Module, for correcting the target injection pressure value of the current working phase according to the modifying factor of the current working phase.
6. electronic control system according to claim 5, which is characterized in that the current working phase is cold-start phase
Or when warm up phase, the modifying factor is height above sea level signal and intake air temperature signals；
When the current working phase is warm-up period, the modifying factor is height above sea level signal, intake air temperature signals and internal combustion
Machine coolant temperature signal.
7. electronic control system according to claim 5, which is characterized in that the injection pressure control module further includes limit
Molding block, the variation of bound and target injection pressure value for limiting the target injection pressure value of the current working phase
Gradient.
8. a kind of internal-combustion engine variable injection pressure control method, which is characterized in that use electronic control as described in claim 1
System includes the following steps:
S1: the working stage that parameter acquisition module obtains Current internal combustion engines judges parameter and current working phase affecting parameters；
S2: stage judgment module judges that parameter judges the current working phase of Current internal combustion engines according to the working stage；
S3: injection pressure control module is stored in corresponding target oil spout in memory module according to current working phase calling
Pressure list presses list and the current working phase affecting parameters to determine target injection pressure value according to the target oil spout,
And current injection pressure is adjusted to target injection pressure value.
9. internal-combustion engine variable injection pressure control method according to claim 8, which is characterized in that the working stage is sentenced
Disconnected parameter is that internal-combustion engine rotational speed and cooling liquid of IC engine temperature, S2 include the following steps:
Internal-combustion engine rotational speed threshold values when whether internal-combustion engine rotational speed is less than startup stage is judged, if so, determining that current working phase is
Cold-start phase；If it is not, then judging whether Current internal combustion engines coolant temperature is in operating temperature section, if being in, judge
Current working phase is warm up phase, if being not at, judges current working phase for warm-up period.
10. internal-combustion engine variable injection pressure control method according to claim 8, which is characterized in that in S3, in basis
After the current working phase affecting parameters determine target injection pressure value, current injection pressure is adjusted to target oil spout pressure
Further include following steps before force value:
The current working phase is corrected according to the modifying factor of the current working phase using injection pressure control module
Target injection pressure value, and/or limit using injection pressure control module the bound and target of the target injection pressure value
The variable gradient of injection pressure value.
11. internal-combustion engine variable injection pressure control method according to claim 10, which is characterized in that current working phase
When for cold-start phase or warm up phase, the modifying factor is height above sea level signal and intake air temperature signals；
When the current working phase is warm-up period, the modifying factor is height above sea level signal, intake air temperature signals and internal combustion
Machine coolant temperature signal.
12. internal-combustion engine variable injection pressure control method according to claim 8, which is characterized in that current working phase
When for cold-start phase, injection pressure control model includes constant target pressure control mode and maximum injection pressure mode；Its
In, under the constant target pressure control mode, current injection pressure is adjusted to the target and sprayed by injection pressure control module
Oil pressure force value；Under the maximum injection pressure mode, current injection pressure is adjusted to internal combustion engine pressure regulator valve maximum pressure value.
13. internal-combustion engine variable injection pressure control method according to claim 12, which is characterized in that the injection pressure
Control model operational process includes the following steps:
Start safety according to comprehensive assessment and starts that discharge shows as a result, selection constant target pressure control mode or maximum
Injection pressure mode.
14. internal-combustion engine variable injection pressure control method according to claim 8, which is characterized in that current working phase
When moving the stage for warming-up, injection pressure control model includes constant target pressure control mode and dynamic object pressure control mould
Formula；
Wherein, under the constant target pressure control mode, internal combustion engine is cooling when current working phase affecting parameters are starting
Current injection pressure is adjusted to corresponding target injection pressure value by liquid temperature, the injection pressure control module；
Under the dynamic object pressure control mode, current working phase affecting parameters are that internal-combustion engine rotational speed and internal combustion engine are negative
Current injection pressure is adjusted to corresponding target injection pressure value by lotus, the injection pressure control module.
15. internal-combustion engine variable injection pressure control method according to claim 14, which is characterized in that in the constant mesh
It marks under pressure control mode, current injection pressure is adjusted to corresponding target injection pressure in the injection pressure control module
Before value, include the following steps:
Judge whether Current Temperatures are lower than 0 DEG C according to internal combustion engine start moment coolant temperature, if so, obtaining current internal combustion
Machine oil spout round and internal combustion engine start moment coolant temperature, and multiplication modifying factor is calculated as presently described target pressure value
Correction factor, the target pressure value is corrected with segmentation, and be adjusted to the current injection pressure to be segmented revised target and spray
Oil pressure force value；If it is not, current injection pressure is directly then adjusted to corresponding target injection pressure value.
16. internal-combustion engine variable injection pressure control method according to claim 15, which is characterized in that in the constant mesh
It marks under pressure control mode, current injection pressure is adjusted to corresponding target injection pressure in the injection pressure control module
Further include following steps before value:
Judge whether current catalyst converter is in heated condition, if so, needing in conjunction with the catalyst converter to engine operating conditions
Impact factor target injection pressure value is modified, and current injection pressure is adjusted to revised target injection pressure
Value；If it is not, current injection pressure is directly then adjusted to corresponding target injection pressure value.
17. internal-combustion engine variable injection pressure control method according to claim 16, which is characterized in that current working phase
For warm-up period, when current catalyst converter is in heated condition or non-heated state, constant target pressure control mode and dynamic mesh
The handoff procedure marked between pressure control mode is as follows:
Switching time threshold values is set, and the timing since the internal combustion engine start；
Start in internal combustion engine start between the time threshold, using constant target pressure control mode；
When internal combustion engine is started to up to the time threshold, starts filtering and calculate to switch to dynamic object pressure control mode.
18. internal-combustion engine variable injection pressure control method according to claim 8, which is characterized in that current working phase
When for warm up phase, the control model of the injection pressure control module includes dynamic object pressure control mode；
Under dynamic object pressure control mode, current working phase affecting parameters are internal-combustion engine rotational speed and engine load, institute
It states injection pressure control module and current injection pressure is adjusted to corresponding target injection pressure value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711117231 | 2017-11-13 | ||
| CN2017111172310 | 2017-11-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109779776A true CN109779776A (en) | 2019-05-21 |
| CN109779776B CN109779776B (en) | 2022-06-24 |
Family
ID=66496215
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810806426.4A Active CN109779776B (en) | 2017-11-13 | 2018-07-20 | Electronic control system and variable fuel injection pressure control method for internal combustion engine |
| CN201810804232.0A Active CN109779775B (en) | 2017-11-13 | 2018-07-20 | Variable fuel injection pressure control method for engine |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810804232.0A Active CN109779775B (en) | 2017-11-13 | 2018-07-20 | Variable fuel injection pressure control method for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN109779776B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396209A (en) * | 2020-03-21 | 2020-07-10 | 东风汽车集团有限公司 | Control method for target oil pressure of direct injection supercharged gasoline engine |
| CN112682194A (en) * | 2020-12-23 | 2021-04-20 | 潍柴动力股份有限公司 | Low-temperature starting control method and system of diesel engine in composite environment |
| CN113063602A (en) * | 2021-04-30 | 2021-07-02 | 中国第一汽车股份有限公司 | Evaluation method for low-temperature cold start oil injection test of direct injection gasoline engine stand |
| CN114233503A (en) * | 2021-12-22 | 2022-03-25 | 奇瑞汽车股份有限公司 | Method and device for controlling fuel injection mode of direct injection engine |
| CN114483406A (en) * | 2022-04-02 | 2022-05-13 | 潍柴动力股份有限公司 | Linear cavitation promotion method and device for diesel engine |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594332A (en) * | 2020-03-19 | 2020-08-28 | 苏州奥易克斯汽车电子有限公司 | Engine fuel injection control correction method |
| CN111520247B (en) * | 2020-03-25 | 2022-05-10 | 吉利汽车研究院（宁波）有限公司 | Method and system for determining air-fuel ratio based on injection pulse width of oil injector |
| CN112832918B (en) * | 2020-12-21 | 2023-06-13 | 中国船舶集团有限公司第七一一研究所 | Combustion closed-loop control method based on fuel injection characteristic parameters of engine fuel injector |
| CN113202676A (en) * | 2021-04-29 | 2021-08-03 | 安徽江淮汽车集团股份有限公司 | Automobile starting control method, automobile starting control equipment, storage medium and automobile starting control device |
| CN114151219A (en) * | 2021-11-26 | 2022-03-08 | 重庆红江机械有限责任公司 | Double-closed-loop PID rail pressure control method and system, common rail diesel engine and storage medium |
| CN114923724B (en) * | 2022-07-22 | 2022-10-28 | 西安交通大学 | Gradient thermal shock and thermal fatigue test device and method for aerospace vehicle structure |
| CN115717570B (en) * | 2022-10-31 | 2024-04-19 | 东风汽车集团股份有限公司 | Target oil pressure dynamic correction method, device and storage medium |
| CN115898684B (en) * | 2022-11-30 | 2024-09-24 | 东风汽车集团股份有限公司 | Target oil pressure optimization design method under transient working condition of low-pressure EGR system |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6035829A (en) * | 1998-01-13 | 2000-03-14 | Siemens Aktiengesellschaft | Method of specifying an injection-pressure setpoint value in an accumulator injection system |
| JP3083332B2 (en) * | 1991-01-30 | 2000-09-04 | マツダ株式会社 | Fuel injection control device for diesel engine |
| US20010003975A1 (en) * | 1999-11-30 | 2001-06-21 | Yoshitatsu Nakamura | Fuel pressure control device of engine |
| US20040011333A1 (en) * | 2000-09-22 | 2004-01-22 | Kai-Uwe Grau | Method for operating an internal combustion engine |
| US20050188958A1 (en) * | 2004-02-28 | 2005-09-01 | Rolf Klenk | Arrangement for supplying fuel to the fuel injectors of an internal combustion engine |
| JP2008064053A (en) * | 2006-09-08 | 2008-03-21 | Denso Corp | Fuel injection control system |
| CN101506503A (en) * | 2006-08-18 | 2009-08-12 | 罗伯特·博世有限公司 | Method for the determination of a rail pressure nominal value |
| US20100101536A1 (en) * | 2008-10-29 | 2010-04-29 | Denso Corporation | Control device for in-cylinder injection internal combustion engine |
| CN101802375A (en) * | 2007-09-20 | 2010-08-11 | 通用电气公司 | System and method for controlling the fuel injection event in an internal combustion engine |
| JP2011157822A (en) * | 2010-01-29 | 2011-08-18 | Denso Corp | Fuel injection control device for internal combustion engine |
| CN102606324A (en) * | 2011-01-19 | 2012-07-25 | 通用汽车环球科技运作有限责任公司 | Fuel rail pressure control systems and methods |
| KR20120133615A (en) * | 2011-05-31 | 2012-12-11 | 콘티넨탈 오토모티브 시스템 주식회사 | Fuel pressure control system and method of flexible fuel vehicle |
| CN101943072B (en) * | 2009-07-01 | 2015-04-15 | 福特环球技术公司 | Fuel system with electrically-controllable mechanical pressure regulator |
| CN105074183A (en) * | 2013-04-11 | 2015-11-18 | 罗伯特·博世有限公司 | Method for operating a common rail system of a motor vehicle having a redundant rail pressure sensor |
| CN105863864A (en) * | 2016-05-03 | 2016-08-17 | 清华大学 | Cold-start and small-load combustion control system and method for low-temperature combustion engine |
| EP3070310A1 (en) * | 2015-03-18 | 2016-09-21 | Toyota Jidosha Kabushiki Kaisha | Control apparatus for vehicle |
| JP2016200106A (en) * | 2015-04-14 | 2016-12-01 | トヨタ自動車株式会社 | Hybrid vehicle |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5191983B2 (en) * | 2009-12-16 | 2013-05-08 | 日立オートモティブシステムズ株式会社 | Diagnostic device for internal combustion engine |
| JP2011226328A (en) * | 2010-04-16 | 2011-11-10 | Nikki Co Ltd | Engine air-fuel ratio control device |
| JP2012229656A (en) * | 2011-04-26 | 2012-11-22 | Toyota Motor Corp | Internal combustion engine control apparatus |
| US9695772B2 (en) * | 2014-09-24 | 2017-07-04 | GM Global Technology Operations LLC | System and method for adjusting fuel injection parameters during transient events to reduce particulate emissions |
| CN105422296B (en) * | 2015-12-24 | 2019-01-08 | 苏州达菲特过滤技术股份有限公司 | A kind of high-pressure common rail oil injection compress control method and system |
-
2018
- 2018-07-20 CN CN201810806426.4A patent/CN109779776B/en active Active
- 2018-07-20 CN CN201810804232.0A patent/CN109779775B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3083332B2 (en) * | 1991-01-30 | 2000-09-04 | マツダ株式会社 | Fuel injection control device for diesel engine |
| US6035829A (en) * | 1998-01-13 | 2000-03-14 | Siemens Aktiengesellschaft | Method of specifying an injection-pressure setpoint value in an accumulator injection system |
| US20010003975A1 (en) * | 1999-11-30 | 2001-06-21 | Yoshitatsu Nakamura | Fuel pressure control device of engine |
| US20040011333A1 (en) * | 2000-09-22 | 2004-01-22 | Kai-Uwe Grau | Method for operating an internal combustion engine |
| US20050188958A1 (en) * | 2004-02-28 | 2005-09-01 | Rolf Klenk | Arrangement for supplying fuel to the fuel injectors of an internal combustion engine |
| CN101506503A (en) * | 2006-08-18 | 2009-08-12 | 罗伯特·博世有限公司 | Method for the determination of a rail pressure nominal value |
| JP2008064053A (en) * | 2006-09-08 | 2008-03-21 | Denso Corp | Fuel injection control system |
| CN101802375A (en) * | 2007-09-20 | 2010-08-11 | 通用电气公司 | System and method for controlling the fuel injection event in an internal combustion engine |
| US20100101536A1 (en) * | 2008-10-29 | 2010-04-29 | Denso Corporation | Control device for in-cylinder injection internal combustion engine |
| CN101943072B (en) * | 2009-07-01 | 2015-04-15 | 福特环球技术公司 | Fuel system with electrically-controllable mechanical pressure regulator |
| JP2011157822A (en) * | 2010-01-29 | 2011-08-18 | Denso Corp | Fuel injection control device for internal combustion engine |
| CN102606324A (en) * | 2011-01-19 | 2012-07-25 | 通用汽车环球科技运作有限责任公司 | Fuel rail pressure control systems and methods |
| KR20120133615A (en) * | 2011-05-31 | 2012-12-11 | 콘티넨탈 오토모티브 시스템 주식회사 | Fuel pressure control system and method of flexible fuel vehicle |
| CN105074183A (en) * | 2013-04-11 | 2015-11-18 | 罗伯特·博世有限公司 | Method for operating a common rail system of a motor vehicle having a redundant rail pressure sensor |
| EP3070310A1 (en) * | 2015-03-18 | 2016-09-21 | Toyota Jidosha Kabushiki Kaisha | Control apparatus for vehicle |
| JP2016200106A (en) * | 2015-04-14 | 2016-12-01 | トヨタ自動車株式会社 | Hybrid vehicle |
| CN105863864A (en) * | 2016-05-03 | 2016-08-17 | 清华大学 | Cold-start and small-load combustion control system and method for low-temperature combustion engine |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396209A (en) * | 2020-03-21 | 2020-07-10 | 东风汽车集团有限公司 | Control method for target oil pressure of direct injection supercharged gasoline engine |
| CN111396209B (en) * | 2020-03-21 | 2021-06-01 | 东风汽车集团有限公司 | Control method for target oil pressure of direct injection supercharged gasoline engine |
| CN112682194A (en) * | 2020-12-23 | 2021-04-20 | 潍柴动力股份有限公司 | Low-temperature starting control method and system of diesel engine in composite environment |
| CN113063602A (en) * | 2021-04-30 | 2021-07-02 | 中国第一汽车股份有限公司 | Evaluation method for low-temperature cold start oil injection test of direct injection gasoline engine stand |
| CN114233503A (en) * | 2021-12-22 | 2022-03-25 | 奇瑞汽车股份有限公司 | Method and device for controlling fuel injection mode of direct injection engine |
| CN114483406A (en) * | 2022-04-02 | 2022-05-13 | 潍柴动力股份有限公司 | Linear cavitation promotion method and device for diesel engine |
| CN114483406B (en) * | 2022-04-02 | 2022-07-29 | 潍柴动力股份有限公司 | Linear cavitation promotion method and device for diesel engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109779775A (en) | 2019-05-21 |
| CN109779775B (en) | 2022-04-05 |
| CN109779776B (en) | 2022-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109779776A (en) | Electronic control system and internal-combustion engine variable injection pressure control method | |
| CN101142399B (en) | Fuel supply apparatus for internal combustion engine | |
| KR100916737B1 (en) | Control device of internal combustion engine | |
| RU2692605C2 (en) | Method for reduction of degree of dilution of oil in engine (versions) | |
| EP1907680B1 (en) | Control apparatus for internal combustion engine | |
| CN101818694B (en) | Cylinder-deactivation control method and device of electronic-control fuel-injection multi-cylinder internal-combustion engine | |
| CN104870774B (en) | The control device of engine | |
| JPH0323342A (en) | Fuel feed system for plurality of cylinders internal combustion engine and control device thereof | |
| KR100898884B1 (en) | Control apparatus for internal combustion engine | |
| CN101057069B (en) | Control apparatus for internal combustion engine | |
| JP5523082B2 (en) | Early warm-up control method for internal combustion engine | |
| KR100291712B1 (en) | Combustion control device of internal combustion engine | |
| WO2017002578A1 (en) | Engine control device | |
| JP6302710B2 (en) | Fuel supply apparatus and fuel supply method for internal combustion engine | |
| JP6565875B2 (en) | Control device for internal combustion engine | |
| JP2015117661A (en) | Engine fuel injection control device | |
| CN103370519A (en) | Device for controlling fuel injection in internal combustion engine | |
| JP3651191B2 (en) | Fuel injection control device for internal combustion engine | |
| CN113464296A (en) | Fuel injection control device | |
| CN113464295A (en) | Fuel injection control device | |
| CN113464293A (en) | Fuel injection control device | |
| CN111946521A (en) | Control method for improving cold starting performance of internal combustion engine | |
| JP4349233B2 (en) | Control device for internal combustion engine | |
| JP2015121156A (en) | Control device of internal combustion engine | |
| CN104204506A (en) | Ignition timing control device of internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |