CN113756907B - Engine oil pressure control method and device and vehicle - Google Patents
Engine oil pressure control method and device and vehicle Download PDFInfo
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- CN113756907B CN113756907B CN202110894510.8A CN202110894510A CN113756907B CN 113756907 B CN113756907 B CN 113756907B CN 202110894510 A CN202110894510 A CN 202110894510A CN 113756907 B CN113756907 B CN 113756907B
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- 239000010705 motor oil Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000003921 oil Substances 0.000 claims abstract description 215
- 230000008859 change Effects 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims description 24
- 238000004590 computer program Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 230000007488 abnormal function Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000004064 dysfunction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/06—Arrangements for cooling pistons
- F01P3/08—Cooling of piston exterior only, e.g. by jets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0223—Variable control of the intake valves only
- F02D13/0234—Variable control of the intake valves only changing the valve timing only
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Abstract
The invention discloses an engine oil pressure control method, an engine oil pressure control device and a vehicle, wherein the method comprises the following steps: determining a reference oil pressure value and a pressure change value of a vehicle engine; detecting a target performance parameter of an engine, judging whether a target oil component of a current vehicle reaches an opening condition or not based on the target performance parameter, and if so, increasing a pressure change value on the basis of a reference engine oil pressure value to obtain a target engine oil pressure value, wherein the target oil component is a component with oil flow higher than a preset flow when the vehicle is opened; the engine is controlled based on the target oil pressure value. The method can effectively avoid the condition that the pressure of the main oil duct of the engine is too low, is favorable for ensuring the normal function of the engine, and improves the reliability of the engine.
Description
Technical Field
The invention relates to the field of automobile engine control, in particular to an engine oil pressure control method, an engine oil pressure control device and a vehicle.
Background
Newly developed engines are increasingly applied to variable displacement oil pumps and various sensor technologies, and the displacement of the oil pump can be adjusted by controlling the duty ratio of the oil pump. An engine oil pressure sensor is arranged on a main oil duct of an engine, target engine oil pressure is preset in an Electronic Control Unit (ECU), when the deviation between the main oil duct oil pressure monitored by the main oil duct pressure sensor and the ECU preset target oil pressure exceeds a certain limit value, the oil pump displacement is controlled by adjusting the duty ratio of the oil pump, and the main oil duct oil pressure of the engine is controlled in a closed loop manner to reach the target pressure.
The above strategy is a control strategy of a variable displacement oil pump commonly adopted by various host factories, and although closed-loop control is adopted, sudden change of oil pressure under certain special working conditions cannot be avoided. Sudden changes in oil pressure beyond certain limits can create various problems.
Disclosure of Invention
The embodiment of the application provides an engine oil pressure control method, an engine oil pressure control device and a vehicle, which can predict the oil pressure required by the current vehicle to adjust the oil pressure of a main oil gallery in advance, so that the condition that the pressure of the main oil gallery of the engine is too low can be effectively avoided, and the normal function of the engine can be ensured.
In a first aspect, the present invention provides the following technical solutions through an embodiment of the present invention:
an engine oil pressure control method comprising:
determining a reference oil pressure value and a pressure change value of a vehicle engine; detecting a target performance parameter of the engine, judging whether a target oil component of a current vehicle reaches an opening condition or not based on the target performance parameter, and if so, increasing the pressure change value on the basis of the reference oil pressure value to obtain a target oil pressure value, wherein the target oil component is a component with oil flow higher than a preset flow when the vehicle is opened; and controlling the engine based on the target engine oil pressure value.
Preferably, after the controlling the engine based on the target oil pressure value, the method further includes: detecting a main oil gallery oil pressure of the engine; and if the oil pressure of the main oil gallery is within a preset oil pressure threshold range, recovering the oil pressure of the engine from the target oil pressure value to the reference oil pressure value.
Preferably, the target oil component includes: variable timing valve VVT and/or piston cooling nozzles.
Preferably, determining a reference oil pressure value for the vehicle engine comprises: and looking up a table in a first preset database to obtain a reference engine oil pressure value of the engine based on the collected rotating speed, power and torque of the engine, wherein the first preset database stores corresponding reference engine oil pressure values under different rotating speeds, different powers and different torques.
Preferably, determining a pressure change value of the vehicle engine comprises: and obtaining a pressure change value of the engine based on the collected rotating speed and engine oil temperature of the engine.
Preferably, the obtaining a pressure variation value of the engine based on the collected rotation speed of the engine and the collected oil temperature includes: and looking up a table in a second preset database to obtain the pressure change value of the engine based on the collected rotating speed and engine oil temperature of the engine, wherein the second preset database stores corresponding pressure change values at different rotating speeds and different oil temperatures.
Preferably, the target oil component comprises a piston cooling nozzle, and the target performance parameters comprise: engine power, engine cylinder pressure and rotational speed, said determining whether a target oil component of a current vehicle has reached an opening condition based on said target performance parameters, comprising: and if the power of the engine is greater than or equal to the first preset value, the cylinder pressure of the engine is greater than or equal to the second preset value, and the rotating speed is greater than or equal to the third preset value, and the piston cooling nozzle is judged to reach an opening condition.
In a second aspect, the present invention provides the following technical solutions through an embodiment of the present invention:
an engine oil pressure control device comprising:
the determining module is used for determining a reference oil pressure value and a pressure change value of the vehicle engine;
the judging module is used for detecting a target performance parameter of the engine, judging whether a target oil consumption component of the current vehicle reaches an opening condition or not based on the target performance parameter, and if so, increasing the pressure change value on the basis of the reference oil pressure value to obtain a target oil pressure value, wherein the target oil consumption component is a component with oil flow higher than a preset flow at the time of opening;
and the control module is used for controlling the engine based on the target engine oil pressure value.
Preferably, the apparatus further comprises:
the detection module is used for detecting the oil pressure of a main oil gallery of the engine;
and the recovery module is used for recovering the engine oil pressure of the engine from the target engine oil pressure value to the reference engine oil pressure value if the oil pressure of the main oil gallery is within a preset oil pressure threshold range.
In a third aspect, the present invention provides the following technical solutions through an embodiment of the present invention:
a vehicle, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of the first aspect when executing the program.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the engine oil pressure control method, the engine oil pressure control device and the vehicle, the reference engine oil pressure value and the pressure change value of the vehicle engine are determined. And detecting a target performance parameter of the engine, judging whether a target oil consumption part of the current vehicle reaches an opening condition or not based on the target performance parameter, and if so, increasing a pressure change value on the basis of a reference engine oil pressure value to obtain a target engine oil pressure value, wherein the target oil consumption part is a part with the oil flow higher than a preset flow when the vehicle is opened. And controlling the engine based on the target oil pressure value. The method includes the steps that whether a target oil consumption part of an engine is opened or not is predicted by collecting target performance parameters of the engine, and if the current conditions meet the opening conditions of the target oil consumption part, a pressure change value is added to a reference engine oil pressure value of the vehicle engine. When the target oil-using component is opened, the oil pressure of the engine main oil gallery can suddenly drop by a certain value, but the value of the oil pressure is increased at the moment, so that the dropped oil pressure can still meet the requirement of the engine, the normal function of the engine is ensured, and the reliability of the engine is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flow chart of a method for controlling engine oil pressure according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of an engine oil pressure control process according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an engine oil pressure control device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.
Detailed Description
The applicant finds that the traditional engine oil pressure control method determines the required oil pressure of the main oil gallery of the engine under various working conditions by combining different oil consumption component requirements through different calibration means. And the engine oil pressure requirement is related to various parameters of the engine, and the target engine oil pressure of the main oil passage of the engine is set according to the engine oil pressure requirement. The method comprises the steps of reading various parameters and various sensor data of an engine through an Electronic Control Unit (ECU) to judge that the engine reaches a certain working condition, further determining the target oil pressure of a main oil duct required to be reached by the engine, measuring the actual oil pressure of the main oil duct through an engine oil pressure sensor, comparing the actual oil pressure of the main oil duct with the target oil pressure, and when the oil pressure difference exceeds a certain limit value, adjusting the duty ratio of an oil pump, further adjusting the displacement of the oil pump, and enabling the oil pressure of the main oil duct of the engine to tend to the target oil pressure.
The target oil pressure should be as close to the actual demand of the engine as possible, which may cause engine dysfunction and reliability risk if the target oil pressure is lower than the actual demand of the engine, and may cause the power consumption of the engine to be increased and the fuel consumption to be increased if the target oil pressure is higher than the actual demand of the engine.
The above proposed general strategy using closed-loop control can adjust the actual oil pressure of the main oil gallery of the engine to reach the target oil pressure, but the closed-loop control has hysteresis, and when the component with large oil consumption, such as VVT (Variable Valve Timing) or piston cooling nozzle, is opened, the flow rate of the engine oil suddenly and rapidly changes, and the pressure of the engine oil suddenly drops. When the oil pressure is lower than the limit value, the VVT response is slowed or a fault code is directly reported, and even when the oil pressure is lower than the alarm limit value, an oil pressure lamp is lightened.
For example, when the VVT is suddenly operated, the oil flow rate increases suddenly by 2 to 3L, and at this time, the oil pressure drops suddenly by about 50 to 80kPa, and at a low engine speed, the total engine oil flow rate is not large, and the flow rate change due to sudden opening of the VVT accounts for a larger ratio, and the influence of the pressure drop is larger. After the oil pressure drops suddenly, the oil pressure of a VVT oil way may be lower than the oil pressure required by the VVT, so that the VVT responsiveness is slowed or the VVT does not act directly to report fault codes, and the driver experience is seriously influenced. In addition, because each cylinder of the engine is provided with one piston cooling nozzle, and the flow of each nozzle is large, when the piston cooling nozzle is suddenly opened, the engine oil flow demand is suddenly and greatly increased, and the engine oil pressure of the main oil gallery of the engine is suddenly reduced. At low speeds, the effect of sudden opening of the piston cooling nozzle is greater due to the lower engine flow and pressure, which may cause the main gallery oil pressure to fall below the warning pressure, causing the oil lamp to light.
In view of this, the embodiment of the present application provides an engine oil pressure control method, an engine oil pressure control device, and a vehicle, which can predict an oil pressure required by a current vehicle to adjust an oil pressure of a main oil gallery in advance, so that a situation that a pressure of the main oil gallery of the engine is too low can be effectively avoided, a normal function of the engine is ensured, and reliability of the engine is improved.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
In a first aspect, an embodiment of the present invention provides an engine oil pressure control method, specifically, as shown in fig. 1, the control method includes the following steps S101 to S103.
Step S101 determines a reference oil pressure value and a pressure change value of the vehicle engine. Wherein the reference oil pressure value represents a standard pressure value required by the engine in the current operation state.
In a specific implementation, determining a reference oil pressure value of a vehicle engine may include: and based on the acquired rotating speed, power and torque of the engine, looking up a table in a first preset database to obtain a reference engine oil pressure value of the engine, wherein the first preset database stores corresponding reference engine oil pressure values under different rotating speeds, different powers and different torques.
Specifically, relevant parameters such as the rotating speed, the power and the torque of the engine are obtained through an Electronic Control Unit (ECU), and a reference oil pressure value corresponding to the current vehicle engine is searched in a first preset database based on the obtained parameters. The first preset database can be established by means of experiments: the engine of the vehicle is controlled, so that the performance parameters of the engine are changed, and the required engine oil pressure value is used as the reference engine oil pressure value of the engine under the conditions of measuring different rotating speeds, different powers and different torque parameters of the engine.
In particular implementations, determining a pressure change value for a vehicle engine may include: and obtaining a pressure change value of the engine based on the collected rotating speed of the engine and the collected oil temperature.
As an alternative embodiment, obtaining the pressure variation value of the engine based on the collected engine speed and the collected oil temperature may include: and looking up a table in a second preset database to obtain a pressure change value delta P of the engine based on the collected rotating speed and engine oil temperature of the engine, wherein the second preset database stores corresponding pressure change values delta P at different rotating speeds and at different oil temperatures.
Specifically, the rotation speed and the engine oil temperature of the engine are acquired through an Electronic Control Unit (ECU), and based on the acquired parameters, the pressure change value Δ P corresponding to the current vehicle engine is searched in a second preset database. The second preset database can be established in a test mode, and specifically includes: the method comprises the following steps of controlling an engine of a vehicle, enabling engine performance parameters to be changed, and measuring change values of oil pressure of a main oil gallery when target oil components are suddenly opened under different rotating speeds and different temperatures of the engine, for example: the VVT suddenly opens to reduce the oil pressure by 50-80 kPa when the temperature of the engine oil is 120 ℃ through tests.
Because different rotating speeds and different oil temperatures can influence the magnitude of the pressure change value, different pressure change values need to be set according to different rotating speeds and different oil temperatures, the variation quantity of the engine oil pressure of the engine at different rotating speeds and different temperatures is obtained, and therefore a database for adjusting the pressure change value is established. The database is used for adding a corresponding pressure change value delta P in the database on the basis of the target engine oil pressure before judging that oil consumption components with large oil consumption, such as VVT or piston cooling nozzles, need to be opened.
Of course, as another alternative embodiment, the pressure change value Δ P of the engine may also be calculated in real time based on the collected rotation speed of the engine and the collected oil temperature.
Step S102, detecting a target performance parameter of the engine, judging whether a target oil component of the current vehicle reaches an opening condition or not based on the target performance parameter, and if so, increasing a pressure change value on the basis of a reference oil pressure value to obtain a target oil pressure value, wherein the target oil component is a component with oil flow higher than a preset flow when the vehicle is opened.
The target oil components herein may include: variable timing valves VVT and/or piston cooling nozzles, etc., which increase the engine oil flow rate sharply at the time of opening. Of course, any component having an oil flow rate higher than the preset flow rate at the time of start-up may be regarded as the target oil-using component, and is not limited herein. The determination of the preset flow rate can be set according to actual conditions.
In a specific implementation process, as shown in fig. 2, the target performance parameters of the engine may include relevant parameters such as engine speed, power and torque, and the ECU obtains the parameters to predict whether oil components such as the VVT and the piston cooling nozzle reach the opening conditions, so as to know when the VVT and the piston cooling nozzle will be opened. If the VVT or the piston cooling nozzle meets the opening condition through the parameters and indicates that the opening condition is before the oil using part is opened at the moment, the pressure change value delta P is increased on the basis of the reference engine oil pressure value, and the target engine oil pressure value is obtained. When the VVT or the piston cooling nozzle is suddenly opened, the oil pressure of the main oil passage of the engine suddenly drops by a certain value, but the target oil pressure is increased by delta P, so that the oil pressure after the drop can still meet the requirement of the engine, and the normal function of the engine can be ensured.
If the VVT or the piston cooling nozzle and other oil using components do not meet the opening condition through the parameters, the reference engine oil pressure value is maintained unchanged, the engine oil pressure is ensured to be accurately matched with the engine requirement, and the oil consumption of the engine is reduced.
Specifically, when the target oil component comprises a piston cooling nozzle, the target performance parameters include: when the power, the cylinder pressure and the rotation speed of the engine are measured, judging whether the target oil consumption component of the current vehicle reaches the opening condition based on the target performance parameters may include: and if the power of the engine is greater than or equal to the first preset value, the cylinder pressure of the engine is greater than or equal to the second preset value, and the rotating speed is greater than or equal to the third preset value, judging that the piston cooling nozzle reaches an opening condition.
The first preset value, the second preset value and the third preset value can be set according to the actual condition of the vehicle. For example, for a certain vehicle engine, if the engine power is greater than or equal to 50kW, the engine cylinder pressure is greater than or equal to 18bar and the rotating speed is greater than or equal to 1500rpm, it is determined that the piston cooling nozzle reaches the open condition.
Likewise, when the target oil component includes VVT, the target performance parameters include: when the power, the cylinder pressure and the rotation speed of the engine are measured, judging whether the target oil consumption component of the current vehicle reaches the opening condition based on the target performance parameters may include: and if the power of the engine is larger than or equal to the fourth preset value, the cylinder pressure of the engine is larger than or equal to the fifth preset value, and the rotating speed is larger than or equal to the sixth preset value, judging whether the VVT reaches an opening condition. The fourth preset value, the fifth preset value and the sixth preset value can be set according to the actual conditions of the vehicle.
And step S103, controlling the engine based on the target engine oil pressure value.
Based on the method, after the target engine oil pressure value of the engine is obtained, the obtained target engine oil pressure value is used for controlling the engine, so that the pressure after the oil pressure is reduced is still larger than the original target oil pressure before oil components such as the VVT and a piston cooling nozzle are opened, and the oil pressure reduction can not cause the abnormal functions of the components such as the VVT and the fault code reporting.
Further, in order to ensure the accuracy of the engine oil pressure control and maintain the stable operation of the engine, after the engine is controlled based on the target oil pressure value, the method further comprises the following steps: detecting the oil pressure of a main oil gallery of the engine; and if the oil pressure of the main oil gallery is within the preset oil pressure threshold range, recovering the oil pressure of the engine from the target oil pressure value to the reference oil pressure value.
Specifically, the engine control based on the target oil pressure value is only performed when the VVT or the piston cooling nozzle is just opened, and the target oil pressure value needs to be restored to the reference oil pressure value after the opening is completed and the oil pressure in the engine main oil gallery is stabilized. In actual control, whether the oil pressure of the main oil gallery within a period of time is within a preset oil pressure threshold range can be detected, and if yes, the current target engine oil pressure value is restored to the reference engine oil pressure value. The preset oil pressure threshold range can be set according to actual conditions.
In summary, according to the engine oil pressure control method provided by the embodiment of the invention, the starting time of the target oil-consuming component can be predicted through the target performance parameter of the engine, the oil pressure required by the current vehicle is predicted, and the main oil gallery oil pressure is adjusted in advance, so that the condition that the main oil gallery pressure of the engine is too low can be effectively avoided, the normal function of the engine can be ensured, and the reliability of the engine can be improved.
In a second aspect, based on the same inventive concept, the present embodiment provides an engine oil pressure control device, as shown in fig. 3, including:
the determining module 301 is used for determining a reference oil pressure value and a pressure change value of a vehicle engine;
the judging module 302 is configured to detect a target performance parameter of the engine, judge whether a target oil consumption component of a current vehicle reaches an opening condition based on the target performance parameter, and if so, increase a pressure change value on the basis of a reference oil pressure value to obtain a target oil pressure value, where the target oil consumption component is a component with an oil flow higher than a preset flow when the vehicle is opened;
and the control module 303 is configured to control the engine based on the target oil pressure value.
As an alternative embodiment, the apparatus further comprises:
the detection module is used for detecting the oil pressure of a main oil gallery of the engine;
and the recovery module is used for recovering the engine oil pressure of the engine to a reference engine oil pressure value from a target engine oil pressure value if the oil pressure of the main oil gallery is within a preset oil pressure threshold range.
As an alternative embodiment, the determining module 301 includes:
and the first acquisition submodule is used for looking up a table in a first preset database to obtain a reference engine oil pressure value of the engine based on the acquired rotating speed, power and torque of the engine, wherein the first preset database stores corresponding reference engine oil pressure values under different rotating speeds, different powers and different torques.
As an optional embodiment, the determining module 301 further includes:
and the second acquisition submodule is used for acquiring a pressure change value of the engine based on the acquired rotating speed and engine oil temperature of the engine.
As an optional embodiment, the second obtaining sub-module is specifically configured to:
and looking up a table in a second preset database to obtain the pressure change value of the engine based on the collected rotating speed and engine oil temperature of the engine, wherein the second preset database stores corresponding pressure change values at different rotating speeds and different oil temperatures.
As an alternative embodiment, the target oil component comprises a piston cooling nozzle, and the target performance parameters comprise: the determination module 302 is specifically configured to:
and if the power of the engine is greater than or equal to the first preset value, the cylinder pressure of the engine is greater than or equal to the second preset value, and the rotating speed is greater than or equal to the third preset value, judging that the piston cooling nozzle reaches an opening condition.
The above modules may be implemented by software codes, and in this case, the modules may be stored in a memory of the control device. The above modules may also be implemented by hardware, such as an integrated circuit chip.
The implementation principle and the technical effects of the engine oil pressure control device provided by the embodiment of the invention are the same as those of the method embodiment, and for the sake of brief description, the corresponding contents in the method embodiment can be referred to where the device embodiment is not mentioned.
In a third aspect, based on the same inventive concept, the present embodiment provides a vehicle 400, as shown in fig. 4, including: a voice module 404, a memory 401, a processor 402 and a computer program 403 stored on the memory and executable on the processor, wherein the processor 401, when executing the program, implements the steps of the engine oil pressure control method of the first aspect.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. An engine oil pressure control method characterized by comprising:
determining a reference oil pressure value and a pressure change value of a vehicle engine;
detecting a target performance parameter of the engine, judging whether a target oil component of a current vehicle reaches an opening condition or not based on the target performance parameter, and if so, increasing the pressure change value on the basis of the reference oil pressure value to obtain a target oil pressure value, wherein the target oil component is a component with oil flow higher than a preset flow when the vehicle is opened;
controlling the engine based on the target oil pressure value;
wherein after the controlling the engine based on the target oil pressure value, further comprising:
detecting a main oil gallery oil pressure of the engine;
and if the oil pressure of the main oil gallery is within a preset oil pressure threshold range, recovering the oil pressure of the engine from the target oil pressure value to the reference oil pressure value.
2. The method of claim 1, wherein the target oil component comprises: variable timing valve VVT and/or piston cooling nozzles.
3. The method of claim 1, wherein determining a baseline oil pressure value for a vehicle engine comprises:
and looking up a table in a first preset database to obtain a reference engine oil pressure value of the engine based on the collected rotating speed, power and torque of the engine, wherein the first preset database stores corresponding reference engine oil pressure values under different rotating speeds, different powers and different torques.
4. The method of claim 1, wherein determining a pressure change value for a vehicle engine comprises:
and obtaining a pressure change value of the engine based on the collected rotating speed and engine oil temperature of the engine.
5. The method of claim 4, wherein the deriving the pressure change value of the engine based on the collected speed of the engine and the collected oil temperature comprises:
and looking up a table in a second preset database to obtain the pressure change value of the engine based on the collected rotating speed and engine oil temperature of the engine, wherein the second preset database stores corresponding pressure change values at different rotating speeds and different oil temperatures.
6. The method of claim 1, wherein the target oil component comprises a piston cooling nozzle, and the target performance parameters comprise: engine power, engine cylinder pressure and rotational speed, said determining whether a target oil component of a current vehicle has reached an opening condition based on said target performance parameters, comprising:
and if the power of the engine is greater than or equal to a first preset value, the cylinder pressure of the engine is greater than or equal to a second preset value, and the rotating speed is greater than or equal to a third preset value, and the piston cooling nozzle is judged to reach an opening condition.
7. An engine oil pressure control device characterized by comprising:
the determining module is used for determining a reference oil pressure value and a pressure change value of the vehicle engine;
the judging module is used for detecting a target performance parameter of the engine, judging whether a target oil component of a current vehicle reaches an opening condition or not based on the target performance parameter, and if so, increasing the pressure change value on the basis of the reference oil pressure value to obtain a target oil pressure value, wherein the target oil component is a component with oil flow higher than a preset flow when the vehicle is opened;
the control module is used for controlling the engine based on the target engine oil pressure value;
the detection module is used for detecting the oil pressure of a main oil gallery of the engine;
and the recovery module is used for recovering the engine oil pressure of the engine from the target engine oil pressure value to the reference engine oil pressure value if the oil pressure of the main oil gallery is within a preset oil pressure threshold range.
8. A vehicle, characterized by comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of any one of claims 1-6 when the program is executed.
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| CN114658511B (en) * | 2022-04-28 | 2023-03-24 | 湖南道依茨动力有限公司 | Early warning method and device for engine oil pressure, readable storage medium and engine |
| CN114738075B (en) * | 2022-05-05 | 2023-03-17 | 一汽解放汽车有限公司 | Engine output torque control method and device based on engine oil pressure and vehicle |
| CN114893274B (en) * | 2022-05-16 | 2023-05-12 | 东风汽车集团股份有限公司 | Control method and system for engine oil pressure of gasoline engine |
| CN115182801B (en) * | 2022-07-25 | 2023-10-20 | 东风汽车集团股份有限公司 | Fault processing method and system for lubricating system of engine |
| CN115341974A (en) * | 2022-09-13 | 2022-11-15 | 广州汽车集团股份有限公司 | Control method and device for engine oil pressure of vehicle and hybrid electric vehicle |
| CN115405433B (en) * | 2022-09-29 | 2023-11-17 | 潍柴动力股份有限公司 | Control method, device, equipment and medium for engine oil supply pressure |
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| GB2480474B (en) * | 2010-05-20 | 2016-10-05 | Ford Global Tech Llc | An oil supply system for an engine |
| FR2972488B1 (en) * | 2011-03-10 | 2013-03-29 | Peugeot Citroen Automobiles Sa | THERMAL ENGINE LUBRICATING SYSTEM COMPRISING A VARIABLE CYLINDER OIL PUMP |
| DE102013113217A1 (en) * | 2013-11-29 | 2015-06-03 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Apparatus and method for lubricating and cooling pistons of an internal combustion engine |
| KR20200122513A (en) * | 2019-04-18 | 2020-10-28 | 현대자동차주식회사 | Apparatus for controlling pressure of oil pump |
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