CN115898688A - Method and system for correcting pollutant emission of electric control diesel engine and storage medium - Google Patents
Method and system for correcting pollutant emission of electric control diesel engine and storage medium Download PDFInfo
- Publication number
- CN115898688A CN115898688A CN202211734667.5A CN202211734667A CN115898688A CN 115898688 A CN115898688 A CN 115898688A CN 202211734667 A CN202211734667 A CN 202211734667A CN 115898688 A CN115898688 A CN 115898688A
- Authority
- CN
- China
- Prior art keywords
- environment
- vehicle
- temperature
- diesel engine
- pollutant emission
- 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.)
- Pending
Links
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 64
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008929 regeneration Effects 0.000 claims abstract description 62
- 238000011069 regeneration method Methods 0.000 claims abstract description 62
- 230000007613 environmental effect Effects 0.000 claims abstract description 46
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 230000009471 action Effects 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 55
- 229910052799 carbon Inorganic materials 0.000 claims description 55
- 230000002035 prolonged effect Effects 0.000 claims description 26
- 238000009825 accumulation Methods 0.000 claims description 15
- 238000012937 correction Methods 0.000 claims description 11
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 238000002715 modification method Methods 0.000 claims 3
- 230000001276 controlling effect Effects 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000010705 motor oil Substances 0.000 abstract description 12
- 239000012895 dilution Substances 0.000 abstract description 9
- 238000010790 dilution Methods 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 25
- 239000007789 gas Substances 0.000 description 17
- 230000033228 biological regulation Effects 0.000 description 13
- BUCXEFZXWKUCCY-UHFFFAOYSA-N 4-methyl-3-(2-phenylethyl)-1,2,4-oxadiazol-5-one Chemical compound O1C(=O)N(C)C(CCC=2C=CC=CC=2)=N1 BUCXEFZXWKUCCY-UHFFFAOYSA-N 0.000 description 9
- 238000002229 photoelectron microspectroscopy Methods 0.000 description 9
- 238000005457 optimization Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The embodiment of the invention discloses a method, a system and a storage medium for correcting pollutant emission of an electronic control diesel engine, wherein the method comprises the following steps: collecting an ambient pressure signal and an ambient temperature signal; judging the current running environment of the vehicle according to the environment pressure signal and the environment temperature signal; and controlling the action of the related actuator according to the current running environment of the vehicle, and adjusting the pollutant emission of the electric control diesel engine under the working condition. When the environmental temperature and the altitude change, the combustion parameters of the engine are corrected, the pollutant discharge of the engine is balanced, the maximum regeneration mileage of the whole vehicle is ensured, the regeneration frequency of the engine is reduced, the engine oil dilution risk is reduced, the engine damage caused by the engine oil dilution is avoided, the maintenance cost brought by the engine oil replacement of a user is reduced, the oil consumption of the whole vehicle is reduced, the dynamic property and the economical property of the whole vehicle are ensured, and the method is suitable for popularization and application.
Description
Technical Field
The embodiment of the invention relates to the technical field of diesel engine pollutant emission control, in particular to an electronic control diesel engine pollutant emission correction method, system and storage medium.
Background
At present, the post-processing technical route of the national six light and heavy truck is DOC + DPF + SCR + ASC basically, and due to the national six emission requirements, the post-processing technical route has clear requirements on fuel oil and finished automobile emission, and meanwhile, a manufacturer also has certain requirements on the regeneration mileage of the DPF.
In the emission solution of the national six heavy-duty vehicle, the engine completes emission tests on a standard rack at sea level and at 25 ℃, PEMS tests of the whole vehicle are carried out after national six emission regulations are met, and correction is not carried out after the PEMS tests are confirmed to be met. The minimum temperature required by the national six-emission regulation for the PEMS test emission of the whole vehicle is-7 ℃, the maximum altitude is 2400 m, the emission is not required at the temperature below-7 ℃ and the altitude above 2400 m, and in a low-temperature environment and a plateau environment, because the air inlet temperature of an engine is low, the exhaust temperature of the engine is correspondingly reduced under the suburb working condition, the passive regeneration capacity of the DPF is weak, the carbon accumulation in the DPF is fast, and the regeneration mileage is shortened. Therefore, due to the changes of the environmental temperature and the altitude, the combustion parameters of the engine are changed, so that the carbon loading mileage and the emission of PEMS circulation are changed, however, the existing electric control diesel engine pollutant emission scheme does not optimize and adjust the low-temperature environment and the high-altitude environment, so that the phenomenon of overlarge or undersize of the pollutant emission in the non-standard environment is caused, the carbon loading capacity mileage is influenced, the balance between the carbon loading and the PEMS limit value is influenced, and the dynamic property and the economical efficiency of the whole vehicle are influenced.
The above problems are urgently needed to be solved.
Disclosure of Invention
In order to solve the related technical problems, the invention provides a method, a system and a storage medium for correcting the pollutant emission of an electric control diesel engine, which are used for solving the problems mentioned in the background technology.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for correcting pollutant emission of an electronically controlled diesel engine, including:
collecting an ambient pressure signal and an ambient temperature signal;
judging the current running environment of the vehicle according to the environmental pressure signal and the environmental temperature signal;
and controlling the action of a related actuator according to the current running environment of the vehicle, and adjusting the pollutant emission of the electric control diesel engine under the working condition, so that the carbon accumulation rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
As an optional implementation manner, the acquiring an ambient pressure signal and an ambient temperature signal specifically includes:
installing an environment pressure sensor and an environment temperature sensor on a vehicle;
acquiring a pressure signal of the current running environment of the vehicle through the environment pressure sensor; and acquiring a temperature signal of the current running environment of the vehicle through the environment temperature sensor.
As an optional implementation manner, the determining a current operating environment of the vehicle according to the ambient pressure signal and the ambient temperature signal specifically includes:
an electronic control unit of the vehicle reads the environmental pressure signal and the environmental temperature signal to obtain current environmental pressure data and current environmental temperature data;
and the electronic control unit judges whether the environmental pressure data and the environmental temperature data reach a preset pressure value corresponding to the plateau environment and a preset temperature value corresponding to the low-temperature environment, and if so, judges that the current operating environment of the vehicle is the plateau environment or the low-temperature environment.
As an alternative embodiment, the associated actuators include, but are not limited to, EGR (Exhaust Gas recirculation) valves and TVA (Throttle valve).
As an optional implementation mode, the method for controlling the action of the relevant actuator according to the current running environment of the vehicle and adjusting the pollutant emission of the electrically controlled diesel engine under the working condition comprises the following steps:
if the judgment result shows that the current running environment of the vehicle is a low-temperature environment or a plateau environment, the electronic control unit adjusts the trend of closing the EGR valve and increasing the opening of the TVA according to the pre-calibrated combustion parameters of the low-temperature environment and the plateau environment, so that the carbon accumulating rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
As an optional implementation manner, the controlling, according to the current operating environment of the vehicle, the action of the relevant actuator to adjust the pollutant emission of the electronically controlled diesel engine under the operating condition further includes:
if the judgment result is that the operating environment of the current vehicle is not a low-temperature environment or a plateau environment, when the ambient temperature is higher and higher, the electric control unit controls and reduces the opening of the EGR valve and the opening of the TVA, when the ambient temperature is lower and lower, the electric control unit controls and increases the opening of the TVA, the carbon accumulating rate of the DPF is reduced, and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
As an optional implementation manner, the controlling, according to the current operating environment of the vehicle, the action of the relevant actuator to adjust the pollutant emission of the electronically controlled diesel engine under the operating condition further includes:
if the judgment result shows that the current running environment of the vehicle is not a low-temperature environment or a plateau environment, the electronic control unit controls and increases the TVA opening when the environmental pressure is smaller and smaller, so that the carbon accumulation rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
In a second aspect, an embodiment of the present invention provides an electronically controlled diesel engine pollutant emission correction system, which includes, but is not limited to, an ambient temperature pressure acquisition module, an ambient temperature acquisition module, a control unit, and a plurality of actuators;
the environment pressure acquisition module is used for acquiring a pressure signal of the vehicle in the current operation environment;
the environment temperature acquisition module is used for acquiring a temperature signal of the vehicle in the current running environment;
the control unit is used for judging the current running environment of the vehicle according to the environmental pressure signal and the environmental temperature signal, controlling the actuator to act according to the current running environment of the vehicle, adjusting the pollutant emission of the electric control diesel engine under the working condition, and realizing that the carbon accumulation rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
As an optional embodiment, the ambient pressure acquisition module employs an ambient pressure sensor; the environment temperature acquisition module adopts an environment temperature sensor; the plurality of actuators includes, but is not limited to, an EGR valve and a TVA.
In a third aspect, the present invention provides a computer readable storage medium, wherein the computer readable storage medium stores computer executable instructions, and the computer executable instructions, when executed by a processor, are used for implementing the method for correcting pollutant emission of an electronically controlled diesel engine according to any one of the first aspect.
Compared with the prior art, the technical scheme of the embodiment of the invention not only corrects and optimizes the pollutant emission of the electric control diesel engine under non-standard environments (low-temperature environment and plateau environment), balances between carbon loading and the limit value of PEMS, reduces the carbon accumulating rate of DPF as much as possible under the condition of ensuring that Nox does not exceed the standard, prolongs the regeneration mileage, and effectively solves the problem that the pollutant emission under the non-standard environments is too large or too small, but also calibrates and optimizes the pollutant emission of the electric control diesel engine within the range required by national six regulations, corrects the combustion parameters of the engine after the environmental temperature and altitude change, balances the pollutant emission of the engine, can meet the emission regulations, ensure the regeneration mileage of the whole vehicle, reduce the regeneration frequency of the engine, reduce the dilution risk of engine oil dilution, avoid the damage of the engine caused by engine oil dilution, reduce the maintenance cost brought by the user for replacing the engine oil, simultaneously reduce the oil consumption of the whole vehicle, ensure the dynamic property and the economy of the whole vehicle, and is suitable for popularization and application.
Drawings
In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the background and the embodiments of the present invention will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for correcting pollutant emission of an electronically controlled diesel engine according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a pollutant emission correction system of an electronically controlled diesel engine according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, fig. 1 is a schematic flow chart of a method for correcting pollutant emission of an electronically controlled diesel engine according to an embodiment of the present invention.
The method for correcting the pollutant emission of the electronic control diesel engine in the embodiment comprises the following steps:
s101, collecting an environmental pressure signal and an environmental temperature signal;
s102, judging the current running environment of the vehicle according to the environment pressure signal and the environment temperature signal;
and S103, controlling the action of a related actuator according to the current running environment of the vehicle, and adjusting the pollutant emission of the electrically controlled diesel engine under the working condition, so that the carbon accumulating rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
Example two
The method for correcting the pollutant emission of the electronic control diesel engine in the embodiment comprises the following steps:
s201, collecting an environment pressure signal and an environment temperature signal;
s202, judging the current running environment of the vehicle according to the environment pressure signal and the environment temperature signal;
s203, controlling the action of a related actuator according to the current running environment of the vehicle, adjusting the pollutant emission of the electrically controlled diesel engine under the working condition, and realizing that the carbon accumulating rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
Exemplarily, the step S201 in this embodiment specifically includes:
s2011, an ambient pressure sensor and an ambient temperature sensor are installed on the vehicle;
s2012, acquiring a pressure signal of the current running environment of the vehicle through the environment pressure sensor; and acquiring a temperature signal of the current running environment of the vehicle through the environment temperature sensor.
Illustratively, in this embodiment, the step S202 specifically includes:
s2021, reading the environmental pressure signal and the environmental temperature signal by an electric control unit of the vehicle to obtain current environmental pressure data and current environmental temperature data;
s2022, the electronic control unit judges whether the environmental pressure data and the environmental temperature data reach a preset pressure value corresponding to a plateau environment and a preset temperature value corresponding to a low-temperature environment, and if so, the current operating environment of the vehicle is judged to be the plateau environment or the low-temperature environment.
For example, in the present embodiment, the related actuators in step S203 include, but are not limited to, an EGR (Exhaust Gas recirculation) valve and a TVA (Throttle valve).
Illustratively, in this embodiment, the step S203 includes:
if the judgment result shows that the current running environment of the vehicle is a low-temperature environment or a plateau environment, the electronic control unit adjusts the trend of closing the EGR valve and increasing the opening of the TVA according to the pre-calibrated combustion parameters of the low-temperature environment and the plateau environment, so that the carbon accumulating rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard. The trend adjustment for closing the EGR valve and increasing the TVA opening degree means that the EGR valve opening degree is gradually decreased and the TVA opening degree is gradually increased according to the actual ambient temperature and ambient pressure. In the embodiment, the electronic control unit can adjust the opening degrees of the TVA and the EGR at different ambient pressures and temperatures according to a table look-up manner, that is, the amount of fresh air and the amount of exhaust gas entering the engine are adjusted, so as to finally ensure that Nox emissions do not exceed the limit value and PM is not too high.
To facilitate understanding of the technical solutions of the above embodiments, the following specific descriptions are provided:
first, the six routes of aftertreatment technology commonly used in China are briefly described as follows, and an aftertreatment assembly from the air intake end to the exhaust end of an engine is sequentially as follows according to the direction of air flow:
EGR (Exhaust Gas recirculation) means that part of Exhaust Gas discharged from an engine is returned to an intake manifold and Re-enters a cylinder together with fresh mixture. Since the exhaust gas contains a large amount of polyatomic gases such as CO2, which cannot be combusted but absorbs a large amount of heat due to its high specific heat capacity, the maximum combustion temperature of the air-fuel mixture in the cylinder is lowered, thereby reducing the amount of NOx generated.
TVA (Throttle valve): the throttle valve is only a valve which is arranged on an air inlet pipeline of the engine and used for controlling the fresh air amount, different opening degrees of the valve correspond to different air inflow, when the air inflow is reduced, the combustion of the engine is deteriorated, and the exhaust temperature of the engine can be increased.
DOC (Oxidation Catalyst): the main functions of the utility model are as follows: (1) NO in the exhaust gas is converted into NO2, and when the temperature of the exhaust gas is higher than 300 ℃, the NO2 can regenerate the particles trapped by the DPF, namely passive regeneration. (2) NO in the exhaust gas is converted into NO2, and the conversion efficiency capability of the SCR can be rapidly improved after the proportion of the NO2 in the exhaust gas is increased. (3) When the active regeneration needs to be activated, the DOC oxidizes the injected diesel oil and raises the exhaust gas temperature to about 600 ℃.
DPF (Diesel Particulate Filter): a wall flow structure that traps carbon particles in the exhaust. The DPF is a bag type particulate trap and the working principle is as follows: the exhaust gas flows through a honeycomb bag type particle trap, the gas flow passes through the walls, the particles are retained in the bag, and most of the particles are trapped by this means. Particulate trapping continues to occur, the more particulates will build up within the DPF and eventually clog the DPF, which must be cleaned of carbon particulates by way of regeneration. The regeneration process of the DPF is divided into two forms of passive regeneration and active regeneration.
The SCR (Selective Catalytic Reduction) system is composed of a urea supply unit (SM), a urea injection unit (DM), a urea liquid level temperature and quality sensor, a urea tank, an aftertreatment control unit (ECU), and corresponding pipelines and harnesses. In addition, the aftertreatment assembly may further include a pre-DOC temperature sensor, a pre-DPF temperature sensor, a pre-SCR temperature sensor, a post-SCR temperature sensor, a differential pressure sensor, a pre-DOC NOx sensor, a post-SCR NOx sensor, and the like.
For example, the low temperature environment in this embodiment is defined as the temperature of the current operating environment of the vehicle being below-10 ℃; the plateau environment is defined as an environment where the vehicle is currently operating at an altitude of more than 2400 meters. However, the setting of the low temperature environment and the high altitude environment is not limited to this, and the setting may be freely adjusted according to the specific situation, and for example, the temperature limit of the low temperature environment may be set to-7 ℃.
Specifically, if the operation environment that the judgement result is current vehicle is low temperature environment or plateau environment in this embodiment, then the automatically controlled unit according to the low temperature environment who marks in advance and the combustion parameter of plateau environment, to the trend adjustment of closing the EGR valve and increasing TVA aperture, realize under the condition that NOx does not exceed standard that DPF tired carbon rate reduces, and the regeneration mileage is prolonged, specifically includes:
when the vehicle runs above the altitude of 2400 meters (namely the running environment of the vehicle is a plateau environment), because the six state emission regulations do not require, the electronic control unit closes the EGR through the environmental pressure calibration quantity, reduces PM in engine emission, and at the moment, the speed of carbon particle accumulation in the DPF becomes slow. Meanwhile, the opening of the TVA is increased, the air inflow is adjusted, the exhaust temperature of the engine is increased, the exhaust temperature of the whole vehicle is increased under the suburban working condition, the passive regeneration capacity is improved, carbon particles accumulated in the DPF are slowly burned off, and the regeneration mileage is prolonged; after the pressure difference sensor detects that the carbon particles in the DPF are full, the control unit controls the control unit to enter a regeneration mode, the carbon particles in the DPF are regenerated, meanwhile, the control unit controls the temperature and the time during regeneration, the carbon particles in the DPF are completely burnt, the DPF is not burnt due to overhigh temperature, and the regeneration mileage of the whole vehicle in a high altitude area is prolonged through the calibration optimization.
When the vehicle runs at the ambient temperature of less than-10 ℃ (namely the running environment of the vehicle is a low-temperature environment), because the national emission regulation does not require, the exhaust temperature of the engine becomes low under the low-temperature environment, and in order to increase the exhaust temperature and reduce the PM in the emission, the control unit closes the EGR through the ambient temperature calibration quantity so as to reduce the PM in the emission of the engine, and the speed of carbon particle accumulation in the DPF becomes slow. Meanwhile, the control unit increases the opening of the TVA, adjusts the air inflow, increases the exhaust temperature of the engine, increases the exhaust temperature of the whole vehicle under the suburban working condition, improves the passive regeneration capability, slowly burns off the carbon particles accumulated in the DPF, and prolongs the regeneration mileage; after the pressure difference sensor detects that the carbon particles in the DPF are full, the control unit controls the DPF to enter a regeneration mode, the carbon particles in the DPF are regenerated, meanwhile, the control unit controls the temperature and the time during regeneration, the carbon particles in the DPF are completely burnt, the DPF is not burnt due to overhigh temperature, and the regeneration mileage of the whole automobile in a low-temperature area is prolonged through the calibration optimization.
The technical scheme of the embodiment of the invention carries out correction optimization on the pollutant emission of the electric control diesel engine under the non-standard environment (low-temperature environment and plateau environment), balances between the carbon loading and the limit value of PEMS, reduces the carbon accumulation rate of DPF as much as possible under the condition of ensuring that Nox does not exceed the standard, prolongs the regeneration mileage and effectively solves the problem that the pollutant emission under the non-standard environment is too large or too small.
EXAMPLE III
The method for correcting the pollutant emission of the electronic control diesel engine in the embodiment comprises the following steps:
s301, collecting an environmental pressure signal and an environmental temperature signal;
s302, judging the current running environment of the vehicle according to the environment pressure signal and the environment temperature signal;
and S303, controlling the action of a relevant actuator according to the current running environment of the vehicle, and adjusting the pollutant emission of the electric control diesel engine under the working condition, so that the carbon accumulation rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
Illustratively, in this embodiment, the step S301 specifically includes:
s3011, installing an environmental pressure sensor and an environmental temperature sensor on a vehicle;
s3012, acquiring a pressure signal of the current running environment of the vehicle through the environment pressure sensor; and acquiring a temperature signal of the current running environment of the vehicle through the environment temperature sensor.
Illustratively, in this embodiment, the step S302 specifically includes:
s3021, an electric control unit of the vehicle reads the environmental pressure signal and the environmental temperature signal to obtain current environmental pressure data and current environmental temperature data;
and S3022, the electronic control unit judges whether the environmental pressure data and the environmental temperature data reach preset pressure values corresponding to a plateau environment and temperature values corresponding to a low-temperature environment, and if so, judges that the current operating environment of the vehicle is the plateau environment or the low-temperature environment.
For example, in the present embodiment, the related actuators in step S303 include, but are not limited to, an EGR (Exhaust Gas recirculation) valve and a TVA (Throttle valve).
Illustratively, in this embodiment, the step S303 includes:
if the judgment result is that the current running environment of the vehicle is a low-temperature environment or a plateau environment, the electronic control unit adjusts the trend of closing the EGR valve and increasing the opening of the TVA according to the combustion parameters of the low-temperature environment and the plateau environment calibrated in advance, so that the carbon accumulating rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard. The trend adjustment for closing the EGR valve and increasing the TVA opening degree means that the EGR valve opening degree is gradually decreased and the TVA opening degree is gradually increased according to the actual ambient temperature and ambient pressure. In the embodiment, the electronic control unit can adjust the opening degrees of the TVA and the EGR at different ambient pressures and temperatures according to a table look-up manner, that is, the amount of fresh air and the amount of exhaust gas entering the engine are adjusted, so as to finally ensure that Nox emissions do not exceed the limit value and PM is not too high.
For example, the low temperature environment in the present embodiment is defined as the temperature of the current operating environment of the vehicle being below-10 ℃; the plateau environment is defined as an environment where the vehicle is currently operating at an altitude of more than 2400 meters. However, the setting of the low temperature environment and the high altitude environment is not limited to this, and the setting may be freely adjusted according to the specific situation, and for example, the temperature limit of the low temperature environment may be set to-7 ℃.
Specifically, if the operation environment that the judgement result is current vehicle is low temperature environment or plateau environment in this embodiment, then the automatically controlled unit according to the low temperature environment who marks in advance and the combustion parameter of plateau environment, to the trend adjustment of closing the EGR valve and increasing TVA aperture, realize under the condition that NOx does not exceed standard that DPF tired carbon rate reduces, and the regeneration mileage is prolonged, specifically includes:
when the vehicle runs above the altitude of 2400 meters (namely the running environment of the vehicle is a plateau environment), because the six state emission regulations do not require, the electronic control unit closes the EGR through the environmental pressure calibration quantity, reduces PM in engine emission, and at the moment, the speed of carbon particle accumulation in the DPF becomes slow. Meanwhile, the opening of the TVA is increased, the air inflow is adjusted, the exhaust temperature of the engine is increased, the exhaust temperature of the whole vehicle is increased under the suburban working condition, the passive regeneration capacity is improved, carbon particles accumulated in the DPF are slowly burned off, and the regeneration mileage is prolonged; after the pressure difference sensor detects that the carbon particles in the DPF are full, the control unit controls the control unit to enter a regeneration mode, the carbon particles in the DPF are regenerated, meanwhile, the control unit controls the temperature and the time during regeneration, the carbon particles in the DPF are completely burnt, the DPF is not burnt due to overhigh temperature, and the regeneration mileage of the whole vehicle in a high altitude area is prolonged through the calibration optimization.
When the vehicle runs at the ambient temperature of lower than-10 ℃ (namely the running environment of the vehicle is a low-temperature environment), because of no requirement of national emission regulations, the exhaust temperature of the engine becomes low in the low-temperature environment, and in order to improve the exhaust temperature and reduce PM in the exhaust, the control unit closes the EGR through the ambient temperature calibration quantity to reduce PM in the engine exhaust, and at the moment, the speed of carbon particle accumulation in the DPF becomes slow. Meanwhile, the control unit increases the opening of the TVA, adjusts the air inflow, increases the exhaust temperature of the engine, increases the exhaust temperature of the whole vehicle under the suburban working condition, improves the passive regeneration capability, slowly burns off the carbon particles accumulated in the DPF, and prolongs the regeneration mileage; after the pressure difference sensor detects that the carbon particles in the DPF are full, the control unit controls the DPF to enter a regeneration mode, the carbon particles in the DPF are regenerated, meanwhile, the control unit controls the temperature and the time during regeneration, the carbon particles in the DPF are completely burnt, the DPF is not burnt due to overhigh temperature, and the regeneration mileage of the whole automobile in a low-temperature area is prolonged through the calibration optimization.
The technical scheme of the embodiment of the invention carries out correction optimization on the pollutant emission of the electric control diesel engine under the non-standard environment (low-temperature environment and plateau environment), balances between the carbon loading and the limit value of PEMS, reduces the carbon accumulation rate of DPF as much as possible under the condition of ensuring that Nox does not exceed the standard, prolongs the regeneration mileage and effectively solves the problem that the pollutant emission under the non-standard environment is too large or too small.
Illustratively, the controlling the action of the relevant actuator according to the current running environment of the vehicle to adjust the pollutant emission of the electric control diesel engine under the working condition further comprises the following steps:
if the judgment result shows that the current running environment of the vehicle is not a low-temperature environment or a plateau environment, the electronic control unit controls and increases the opening of the TVA when the environmental pressure is smaller and smaller, so that the carbon accumulating rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard. It should be noted that, in this embodiment, the electronic control unit may adjust the opening degrees of the TVA and the EGR at different ambient pressures and temperatures according to a table lookup manner, that is, adjust the amount of fresh air and the amount of exhaust gas entering the engine, and finally ensure that Nox emissions do not exceed the limit value and PM is not too high.
If the operation environment that the judged result is current vehicle is not low temperature environment and plateau environment in this embodiment, then when ambient pressure is more and more little, the automatically controlled unit control increases the TVA aperture, realizes that under the condition that NOx does not exceed standard, DPF tired carbon rate reduces, and the regeneration mileage prolongs, specifically includes:
when the whole vehicle is at the temperature above-7 ℃ or below 2400 m at the altitude, the control unit performs optimized calibration by adjusting parameters such as EGR opening, TVA opening, fuel injection advance angle and the like on the premise that the emission of the whole vehicle cannot exceed national six regulations, so that the emission Nox is in a proper range, meanwhile, the PM is not too large, and the carbon carrying capacity mileage is prolonged. In the range, with the rise of the ambient temperature, the exhaust temperature is higher, the conversion efficiency of SCR is increased, the control unit controls the opening degree of TVA and the opening degree of EGR valve to be reduced, the fresh air inlet amount of the engine is increased, the combustion is more sufficient, the PM of the engine is reduced, and the regeneration mileage is prolonged; conversely, as the ambient temperature decreases, the control unit will control to increase the opening of the TVA to increase the exhaust temperature. Within 2400 m, as the altitude rises, the exhaust temperature is lower, the conversion efficiency of the SCR is reduced, and at this time, the control unit will control to increase the opening of the TVA and increase the exhaust temperature.
According to the technical scheme of the embodiment of the invention, the pollutant emission calibration optimization of the electronic control diesel engine is carried out within the range required by national six regulations, for example, for an operating environment with the temperature of-7-25 ℃ and the altitude of 0-2400 m, after the environmental temperature and the altitude are changed, the combustion parameters of the engine are corrected, the pollutant (Nox, PM and the like) emission of the engine is balanced, the emission regulations can be met, the maximum regeneration mileage of the whole vehicle can be ensured, the regeneration frequency of the engine is reduced, the engine oil dilution risk is reduced, the damage to the engine caused by engine oil dilution is avoided, the maintenance cost brought by the engine oil replacement of a user is reduced, the fuel consumption of the whole vehicle is reduced, the dynamic property and the economical property of the whole vehicle are ensured, and the electronic control diesel engine is suitable for popularization and application.
Example four
As shown in fig. 2, fig. 2 is a schematic diagram of a pollutant emission correction system of an electronically controlled diesel engine according to an embodiment of the present invention.
The embodiment discloses an electronic control diesel engine pollutant emission correction system 400, which adopts the electronic control diesel engine pollutant emission correction method described in any one of the first to third embodiments, and includes, but is not limited to, an ambient temperature pressure acquisition module 401, an ambient temperature acquisition module 402, a control unit 403 and a plurality of actuators 404; the environment pressure acquisition module 401 is configured to acquire a pressure signal in a current operating environment of the vehicle; the environment temperature acquisition module 402 is configured to acquire a temperature signal of a vehicle in a current operating environment; the control unit 403 is configured to determine a current operating environment of the vehicle according to the environmental pressure signal and the environmental temperature signal, control the actuator 404 to act according to the current operating environment of the vehicle, and adjust pollutant emission of the electronically controlled diesel engine under the operating condition, so that the carbon accumulation rate of the DPF is reduced and the regeneration mileage is extended under the condition that NOx does not exceed the standard.
For example, in the present embodiment, the ambient pressure acquisition module 401 employs an ambient pressure sensor; the ambient temperature acquisition module 402 employs an ambient temperature sensor; the number of actuators 403 include, but are not limited to, an EGR valve and a TVA.
It should be noted that the operation process of the electronically controlled diesel engine pollutant emission modification system 400 in the present embodiment is the same as that disclosed in the first to third embodiments, and is not repeated herein.
The technical scheme of the embodiment of the invention not only corrects and optimizes the pollutant emission of the electric control diesel engine under the non-standard environment, balances the carbon loading with the limit value of PEMS, reduces the carbon accumulation rate of DPF as much as possible under the condition of ensuring that Nox does not exceed the standard, prolongs the regeneration mileage, effectively solves the problem that the pollutant emission under the non-standard environment is too large or too small, but also corrects and optimizes the pollutant emission of the electric control diesel engine within the range required by national six regulations, corrects the combustion parameters of the engine after the environmental temperature and the altitude change, balances the pollutant emission of the engine, can meet the emission regulations, ensure the regeneration mileage of the whole vehicle, reduces the regeneration frequency of the engine, reduces the dilution risk of engine oil, avoids the engine damage caused by engine oil dilution, reduces the maintenance and oil consumption cost caused by engine oil change of a user, simultaneously reduces the power performance and the economy of the whole vehicle, and is suitable for popularization and application.
EXAMPLE five
The embodiment of the invention provides a computer-readable storage medium, wherein computer-executable instructions are stored in the computer-readable storage medium and are used for realizing the method for correcting the pollutant emission of the electronic control diesel engine in any one of the first to the third embodiments when being executed by a processor.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An electronically controlled diesel engine pollutant emission modification method, comprising:
collecting an ambient pressure signal and an ambient temperature signal;
judging the current running environment of the vehicle according to the environment pressure signal and the environment temperature signal;
and controlling the action of a related actuator according to the current running environment of the vehicle, and adjusting the pollutant emission of the electric control diesel engine under the working condition, so that the carbon accumulation rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
2. The method for correcting pollutant emission of an electrically controlled diesel engine according to claim 1, characterized in that said collecting ambient pressure signal and ambient temperature signal comprises:
installing an environment pressure sensor and an environment temperature sensor on a vehicle;
acquiring a pressure signal of the current running environment of the vehicle through the environment pressure sensor; and acquiring a temperature signal of the current running environment of the vehicle through the environment temperature sensor.
3. The method for correcting pollutant emission of an electrically controlled diesel engine according to claim 2, wherein the step of judging the current running environment of the vehicle according to the ambient pressure signal and the ambient temperature signal comprises the following steps:
an electronic control unit of the vehicle reads the environmental pressure signal and the environmental temperature signal to obtain current environmental pressure data and current environmental temperature data;
and the electronic control unit judges whether the environmental pressure data and the environmental temperature data reach a preset pressure value corresponding to the plateau environment and a preset temperature value corresponding to the low-temperature environment, and if so, judges that the current operating environment of the vehicle is the plateau environment or the low-temperature environment.
4. The electronically controlled diesel engine pollutant emission modification method of claim 3, wherein the associated actuators include, but are not limited to, an EGR valve and a TVA.
5. The method for correcting the pollutant emission of the electrically controlled diesel engine according to the claim 4, wherein the step of regulating the pollutant emission of the electrically controlled diesel engine under the working condition according to the action of the relevant actuator controlled by the current running environment of the vehicle comprises the following steps:
if the judgment result shows that the current running environment of the vehicle is a low-temperature environment or a plateau environment, the electronic control unit adjusts the trend of closing the EGR valve and increasing the opening of the TVA according to the pre-calibrated combustion parameters of the low-temperature environment and the plateau environment, so that the carbon accumulating rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
6. The method for correcting pollutant emission of an electrically controlled diesel engine according to claim 5, characterized in that, the method for adjusting pollutant emission of the electrically controlled diesel engine under the working condition according to the action of the relevant actuator controlled by the current running environment of the vehicle further comprises the following steps:
if the judgment result is that the running environment of the current vehicle is not a low-temperature environment or a plateau environment, when the ambient temperature is higher and higher, the electric control unit controls and reduces the opening of the EGR valve and the opening of the TVA, when the ambient temperature is lower and lower, the electric control unit controls and increases the opening of the TVA, and the carbon accumulating rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
7. The method for correcting pollutant emission of an electrically controlled diesel engine according to claim 6, characterized in that, the actions of the relevant actuators are controlled according to the current running environment of the vehicle, and the pollutant emission of the electrically controlled diesel engine under the working condition is adjusted, further comprising the following steps:
if the judgment result shows that the current running environment of the vehicle is not a low-temperature environment or a plateau environment, the electronic control unit controls and increases the opening of the TVA when the environmental pressure is smaller and smaller, so that the carbon accumulating rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
8. An electronically controlled diesel engine pollutant emission correction system, which adopts the electronically controlled diesel engine pollutant emission correction method of claim 1, and comprises but is not limited to an ambient temperature pressure acquisition module, an ambient temperature acquisition module, a control unit and a plurality of actuators;
the environment pressure acquisition module is used for acquiring a pressure signal of the vehicle in the current operation environment;
the environment temperature acquisition module is used for acquiring a temperature signal of the vehicle in the current running environment;
the control unit is used for judging the current running environment of the vehicle according to the environment pressure signal and the environment temperature signal, controlling the actuator to act according to the current running environment of the vehicle, and adjusting the pollutant emission of the electric control diesel engine under the working condition, so that the carbon accumulation rate of the DPF is reduced and the regeneration mileage is prolonged under the condition that NOx does not exceed the standard.
9. The electronically controlled diesel engine pollutant emission modification system of claim 8, wherein the ambient pressure acquisition module employs an ambient pressure sensor; the environment temperature acquisition module adopts an environment temperature sensor; the plurality of actuators includes, but is not limited to, an EGR valve and a TVA.
10. A computer readable storage medium having stored thereon computer executable instructions for implementing the electronically controlled diesel engine pollutant emission modification method of any one of claims 1 to 7 when executed by a processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211734667.5A CN115898688A (en) | 2022-12-30 | 2022-12-30 | Method and system for correcting pollutant emission of electric control diesel engine and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211734667.5A CN115898688A (en) | 2022-12-30 | 2022-12-30 | Method and system for correcting pollutant emission of electric control diesel engine and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115898688A true CN115898688A (en) | 2023-04-04 |
Family
ID=86482403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211734667.5A Pending CN115898688A (en) | 2022-12-30 | 2022-12-30 | Method and system for correcting pollutant emission of electric control diesel engine and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115898688A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388803A (en) * | 1980-07-10 | 1983-06-21 | Nissan Motor Company, Limited | System for rapidly warming up catalytic converter provided to automotive internal combustion engine |
| JP2008121518A (en) * | 2006-11-10 | 2008-05-29 | Toyota Motor Corp | Exhaust emission control device of internal combustion engine |
| CN109751125A (en) * | 2017-11-06 | 2019-05-14 | 福特全球技术公司 | System and method for carrying out on-board engine cleaning procedure in the car |
| CN110500220A (en) * | 2018-05-16 | 2019-11-26 | 大众汽车有限公司 | Method for reducing particulate emission in the situation of the cold start of internal combustion 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 |
-
2022
- 2022-12-30 CN CN202211734667.5A patent/CN115898688A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388803A (en) * | 1980-07-10 | 1983-06-21 | Nissan Motor Company, Limited | System for rapidly warming up catalytic converter provided to automotive internal combustion engine |
| JP2008121518A (en) * | 2006-11-10 | 2008-05-29 | Toyota Motor Corp | Exhaust emission control device of internal combustion engine |
| CN109751125A (en) * | 2017-11-06 | 2019-05-14 | 福特全球技术公司 | System and method for carrying out on-board engine cleaning procedure in the car |
| CN110500220A (en) * | 2018-05-16 | 2019-11-26 | 大众汽车有限公司 | Method for reducing particulate emission in the situation of the cold start of internal combustion 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 |
Non-Patent Citations (1)
| Title |
|---|
| 舒歌群: "内燃机设计与优化", 31 August 2022, 天津大学出版社, pages: 223 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3839235B1 (en) | Method and system for controlling dpf regeneration, and engine | |
| US7104051B2 (en) | Exhaust gas purification device | |
| US8505278B2 (en) | Engine system properties controller | |
| KR102602970B1 (en) | Exhaust gas after-treatment system and method for the exhaust gas after-treatment of an internal combustion engine | |
| CN101103183B (en) | Exhaust gas purification system for internal combustion engine | |
| US20090025370A1 (en) | Exhaust gas purification device for internal combustion engine | |
| CN102003257A (en) | Control of diesel particulate filter regeneration duration | |
| CN110513177B (en) | Method and device for exhaust gas aftertreatment of an internal combustion engine | |
| US10287944B2 (en) | Exhaust purification system and method of desulfurizing lean NOx trap of exhaust purification system provided with lean NOx trap and selective catalytic reduction catalyst | |
| US20130291520A1 (en) | Method of estimating a variation of a quantity of soot accumulated in a diesel particulate filter | |
| CN104863670A (en) | Gasoline engine particulate matter filtering system and regeneration method | |
| US7320214B2 (en) | Exhaust gas purifier for internal combustion engine | |
| US20240026808A1 (en) | Adjusting thermal management mode entry and exit temperature thresholds based on aftertreatment system aging | |
| US20120060475A1 (en) | Method for adapting an exothermic reaction in the exhaust system of a motor vehicle | |
| WO2016130517A1 (en) | SYSTEM AND METHOD FOR DETERMINING ENGINE OUT NOx BASED ON IN-CYLINDER CONTENTS | |
| CN103987929A (en) | Control apparatus for internal combustion engine | |
| CN114033529B (en) | SDPF system and calibration method thereof | |
| CN114109629B (en) | Engine exhaust temperature control method and device and engine | |
| CN115680842A (en) | Controller for a drive train for controlling the ignition time and the air ratio | |
| WO2010126521A1 (en) | Engine system properties controller | |
| US7454895B2 (en) | Diagnosing an aftertreatment system with a nonthermal plasma discharge device coupled to a lean burn engine | |
| CN112127979B (en) | Regeneration method and system of particulate matter catcher, engine and motor vehicle | |
| KR20190069003A (en) | Method for judging the regeneration strategy of the diesel particulate filter with ISG and calculating the amount of soot combustion in a controlled diesel particulate filter | |
| JP2010116817A (en) | Exhaust emission control device of engine | |
| CN115898688A (en) | Method and system for correcting pollutant emission of electric control diesel engine and storage medium |
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 |