CN109268158A - A kind of modified method and system of air input of engine by air - Google Patents
A kind of modified method and system of air input of engine by air Download PDFInfo
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- CN109268158A CN109268158A CN201811131754.5A CN201811131754A CN109268158A CN 109268158 A CN109268158 A CN 109268158A CN 201811131754 A CN201811131754 A CN 201811131754A CN 109268158 A CN109268158 A CN 109268158A
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- engine
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- self study
- air inflow
- inlet manifold
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Classifications
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention provides a kind of modified method and system of air input of engine by air, this method comprises: the engine speed and engine torque corresponding volumetric efficiency different by Bench calibration, to form corresponding table of the operating condition with volumetric efficiency, and the corresponding table is stored in Engine ECU；When engine meets the self study working condition, according to the operating condition of engine and the corresponding table, engine theory air inflow is calculated in setting self study working condition；The practical air inflow of engine is acquired by air flow meter, using the ratio of the engine theory air inflow and the practical air inflow of the engine as flow modificatory coefficient；Using the flow modificatory coefficient as the correction value of actual measurement air input of engine by air, and store into Engine ECU.The present invention can improve engine performance, and reducing air flow sensor measurement drift bring influences.
Description
Technical field
The present invention relates to technical field of automobile engine more particularly to a kind of modified method of air input of engine by air and it is
System.
Background technique
Exhaust gas recycles (Exhaust Gas Recirculation, abbreviation EGR), is that engine after combustion will discharge
The method that air inlet side makes it burn once again is isolated and imported to a part of gas, and light-duty diesel vehicle is come using the technology at present
Reach the discharge for reducing NOX, to meet the requirement of state's V regulation.If but when air inlet side exhaust gas flow it is excessive, will cause smoke intensity
It is bigger than normal that the dpf regeneration time is caused to shorten, and if exhaust gas flow is very few, NOX cannot be effectively reduced to target value, therefore, lead
The exhaust gas flow for entering air inlet side directly affects the properties such as the discharge of engine, oil consumption.
Existing automobile detects new charge amount frequently with air flow sensor, and by formula: the waste gas stream of EGR
The total air inflow of amount=engine-new charge amount, is calculated the exhaust gas flow of EGR.Due to the installation of air flow sensor
The reasons such as direction, precision itself, certainly will will cause the deviation of new charge measurement, to cause the drift of calculating exhaust gas flow
It moves, influences the discharge and oil consumption of engine.Therefore air flow sensor measurement drift bring is overcome to influence, to engine
It can have great significance.
Summary of the invention
The present invention provides a kind of modified method and system of air input of engine by air, solve existing vehicle control exhaust gas flow into
When target of the row EGR to reduce NOX, easily because the deviation of air flow sensor, makes engine air air inlet measurement not
Accurately, the problem of causing the discharge of engine and oil consumption to increase, can improve engine performance, reduce air flow sensor measurement
Bring of drifting about influences.
In order to achieve the above object, the present invention the following technical schemes are provided:
A kind of modified method of air input of engine by air, comprising:
By the different engine speed of Bench calibration and the corresponding volumetric efficiency of engine torque, to form operating condition and fill
The correspondence table of gas efficiency, and the corresponding table is stored in Engine ECU；
Self study working condition is set, when engine meets the self study working condition, according to the operating condition of engine
With the corresponding table, engine theory air inflow is calculated；
The practical air inflow of engine is acquired by air flow meter, by the engine theory air inflow and the engine
The ratio of practical air inflow is as flow modificatory coefficient；
Using the flow modificatory coefficient as the correction value of actual measurement air input of engine by air, and store into Engine ECU.
Preferably, the setting self study working condition includes:
EGR valve is closed, and by the aperture regulation of booster to 100%；
Engine speed is greater than 2500rpm；
Inlet manifold pressure is greater than 1800kpa；
Inlet manifold temperature is greater than 90 DEG C.
Preferably, the operating condition according to engine and the corresponding table, are calculated engine theory air inflow, packet
It includes:
Inlet manifold temperature, inlet manifold pressure, engine single chamber volume, engine is obtained according to the operating condition of engine to turn round
Square and engine speed；
Corresponding volumetric efficiency is obtained according to engine speed, engine torque and the corresponding table；
According to formula:Engine theory air inflow is calculated, wherein m' is the air inlet of engine theory
Amount, P are inlet manifold pressure, and T is inlet manifold temperature, and V is engine single chamber volume, and R is gas constant, and η is intake efficiency.
Preferably, further includes:
When engine operates normally, new charge amount is corrected by the flow modificatory coefficient, and total according to engine
The difference of air inflow and new charge amount determines EGR exhaust flow.
Preferably, further includes:
Judge whether the flow modificatory coefficient is within the scope of given threshold, if it is, not to actual measurement engine into
Tolerance is modified, and is otherwise modified.
The present invention also provides a kind of modified systems of air input of engine by air, comprising:
Unit is demarcated, for passing through the different corresponding volumetric efficiency of engine speed and engine torque of Bench calibration,
To form corresponding table of the operating condition with volumetric efficiency, and the corresponding table is stored in Engine ECU；
Self study unit, for self study working condition to be arranged, when engine meets the self study working condition, root
Operating condition and the corresponding table according to engine, are calculated engine theory air inflow；
Computing unit, for acquiring the practical air inflow of engine by air flow meter, by the engine theory air inlet
The ratio of amount and the practical air inflow of the engine is as flow modificatory coefficient；
Amending unit, for using the flow modificatory coefficient as actual measurement air input of engine by air correction value, and store arrive
In Engine ECU.
Preferably, the self study unit includes:
Setting unit, for closing EGR valve, and by the aperture regulation of booster to 100%；
Revolving speed judging unit, for determining whether engine speed is greater than 2500rpm；
Pressure judging unit, for determining whether inlet manifold pressure is greater than 1800kpa；
Temperature determination unit, for determining whether inlet manifold temperature is greater than 90 DEG C.
Preferably, the computing unit includes:
Get parms unit, obtains inlet manifold temperature, inlet manifold pressure, engine for the operating condition according to engine
Single chamber volume, engine torque and engine speed；
Lookup unit, for obtaining corresponding volumetric efficiency according to engine speed, engine torque and the corresponding table；
Air inflow computing unit, for according to formula:Engine theory air inflow is calculated,
In, m' is engine theory air inflow, and P is inlet manifold pressure, and T is inlet manifold temperature, and V is engine single chamber volume, and R is
Gas constant, η are intake efficiency.
Preferably, further includes:
Exhaust gas flow computing unit, for being corrected by the flow modificatory coefficient fresh when engine operates normally
Air inflow, and EGR exhaust flow is determined according to the difference of the total air inflow of engine and new charge amount.
Preferably, further includes:
Judging unit, for judging whether the flow modificatory coefficient is within the scope of given threshold, if it is, not right
Actual measurement air input of engine by air is modified, and is otherwise modified.
The present invention provides a kind of modified method and system of air input of engine by air, is imitated by calibration engine operating condition and inflation
The correspondence table of rate, and the engine theory air inflow under corresponding operating condition is calculated according to corresponding meter, make itself and actual measurement engine charge
The ratio of amount is as correction value.It is easily because empty when solving target of the existing vehicle control exhaust gas flow progress EGR to reduce NOX
The deviation of mass-air-flow sensor makes the inaccuracy of engine air air inlet measurement, and the discharge of engine and oil consumption is caused to increase
The problem of, engine performance can be improved, reducing air flow sensor measurement drift bring influences.
Detailed description of the invention
In order to illustrate more clearly of specific embodiments of the present invention, attached drawing needed in the embodiment will be made below
Simply introduce.
Fig. 1: being the modified flow diagram of a kind of air input of engine by air provided by the invention.
Specific embodiment
The scheme of embodiment in order to enable those skilled in the art to better understand the present invention with reference to the accompanying drawing and is implemented
Mode is described in further detail the embodiment of the present invention.
Inaccuracy is detected to air input of engine by air for when cause, may cause that engine emission and oil consumption increase asks
Topic, the present invention provides a kind of modified method and system of air input of engine by air, passes through calibration engine operating condition and volumetric efficiency
Corresponding table, and the engine theory air inflow under corresponding operating condition is calculated according to corresponding meter, make itself and actual measurement air input of engine by air
Ratio is as correction value.When solving target of the existing vehicle control exhaust gas flow progress EGR to reduce NOX, easily because of air stream
The deviation of quantity sensor makes the inaccuracy of engine air air inlet measurement, causes the discharge of engine and asking for oil consumption increase
Topic can improve engine performance, and reducing air flow sensor measurement drift bring influences.
As shown in Figure 1, a kind of modified method of air input of engine by air, comprising:
S1: by the different engine speed of Bench calibration and the corresponding volumetric efficiency of engine torque, to form operating condition
With the corresponding table of volumetric efficiency, and the corresponding table is stored in Engine ECU；
S2: setting self study working condition, when engine meets the self study working condition, according to the work of engine
Condition and the corresponding table, are calculated engine theory air inflow；
S3: the practical air inflow of engine is acquired by air flow meter, by the engine theory air inflow and the hair
The ratio of the practical air inflow of motivation is as flow modificatory coefficient；
S4: it using the flow modificatory coefficient as the correction value of actual measurement air input of engine by air, and stores and arrives Engine ECU
In.
Specifically, self study unlocking condition is demarcated in ECU, such as intake manifold temperature, environment temperature, gear shape
The purpose of state, engine speed steadily decline, new charge amount size, vehicle speed range etc., the setting of these conditions is to make engine
Suitable with the environment of the calibration of volumetric efficiency before, after all conditions all meet, tail-off EGR, booster is adjusted to
100% position, the influence to avoid EGR exhaust flow to total air inflow, air inflow total at this time is new charge amount, is started
Machine can enter the self study stage, as engine is under different operating conditions, different new charge amounts, pass through measuring speed density
The ratio for the new charge amount that total air inflow that each parameter value calculation in formula obtains is measured with air flow sensor obtains
Flow modificatory coefficient.Flow modificatory coefficient can be subjected to fragmented storage, the purpose of segmentation according to different new charge amount ranges
It is to reduce test error to obtain the correction factor under different new charge amounts section after self study.Finally these are corrected again
Coefficient is stored into ECU, completes air flow sensor self study.When later period engine operates normally, correction factor will join
The unlatching size of EGR valve is determined in the calculating to new charge amount, and with result after calculating, guarantees that discharge calibration is accurate
Property and consistency.
Further, the setting self study working condition includes: closing EGR valve, and extremely by the aperture regulation of booster
100%；Engine speed is greater than 2500rpm；Inlet manifold pressure is greater than 1800kpa；Inlet manifold temperature is greater than 90 DEG C.
The operating condition according to engine and the corresponding table, are calculated engine theory air inflow, comprising:
S21: inlet manifold temperature is obtained according to the operating condition of engine, inlet manifold pressure, engine single chamber volume, is started
Machine torque and engine speed；
S22: corresponding volumetric efficiency is obtained according to engine speed, engine torque and the corresponding table；
S23: according to formula:Engine theory air inflow is calculated, wherein m' is that engine is theoretical
Air inflow, P are inlet manifold pressure, and T is inlet manifold temperature, and V is engine single chamber volume, and R is gas constant, and η is air inlet
Efficiency.
Further, this method further include:
S5: when engine operates normally, new charge amount is corrected by the flow modificatory coefficient, and according to engine
The difference of total air inflow and new charge amount determines EGR exhaust flow.
Specifically, when engine carries out EGR, the air mass flow that air flow meter detects is new charge amount, and EGR
Exhaust gas flow can not need to control by controlling total air inflow with new charge amount by actual measurement.Wherein, total air inflow can
By closing EGR valve, the engine theory air inflow being calculated when the aperture of booster is opened to 100%, and according to correspondence
Obtain volumetric efficiency under each operating condition in table, so according to engine theory air inflow and volumetric efficiency obtain under the operating condition always into
Tolerance.
This method further include:
S6: judging whether the flow modificatory coefficient is within the scope of given threshold, if it is, not to actual measurement engine
Air inflow is modified, and is otherwise modified.
In practical applications, if correction factor very little, the air inflow of actual measurement can not also be modified.It sets threshold
Value range can be set by actual requirement.
As it can be seen that the present invention provides a kind of modified method of air input of engine by air, by the corresponding inflation of engine operating condition
Efficiency is demarcated, and to form corresponding table of the operating condition with volumetric efficiency, and calculates the engine under corresponding operating condition according to corresponding meter
Theoretical air inflow makes it and surveys the ratio of air input of engine by air as correction value.Solve existing vehicle control exhaust gas flow into
When target of the row EGR to reduce NOX, easily because the deviation of air flow sensor, makes engine air air inlet measurement not
Accurately, the problem of causing the discharge of engine and oil consumption to increase, can improve engine performance, reduce air flow sensor measurement
Bring of drifting about influences.
The present invention also provides a kind of modified systems of air input of engine by air, comprising: calibration unit, for passing through Bench calibration
The different corresponding volumetric efficiencies of engine speed and engine torque, to form corresponding table of the operating condition with volumetric efficiency, and will
The corresponding table is stored in Engine ECU.Self study unit meets institute in engine for self study working condition to be arranged
When stating self study working condition, according to the operating condition of engine and the corresponding table, engine theory air inflow is calculated.It calculates
Unit starts the engine theory air inflow with described for acquiring the practical air inflow of engine by air flow meter
The ratio of the practical air inflow of machine is as flow modificatory coefficient.Amending unit, for being sent out the flow modificatory coefficient as actual measurement
The correction value of motivation air inflow, and store into Engine ECU.
The self study unit includes: setting unit, for closing EGR valve, and extremely by the aperture regulation of booster
100%.Revolving speed judging unit, for determining whether engine speed is greater than 2500rpm.Pressure judging unit, for determine into
Whether gas menifold pressure is greater than 1800kpa.Temperature determination unit, for determining whether inlet manifold temperature is greater than 90 DEG C.
The computing unit includes: the unit that gets parms, for the operating condition according to engine obtain inlet manifold temperature, into
Gas menifold pressure, engine single chamber volume, engine torque and engine speed.Lookup unit, for according to engine speed,
Engine torque and the corresponding table obtain corresponding volumetric efficiency.Air inflow computing unit, for according to formula:Engine theory air inflow is calculated, wherein m' is engine theory air inflow, and P is inlet manifold pressure
Power, T are inlet manifold temperature, and V is engine single chamber volume, and R is gas constant, and η is intake efficiency.
Further, system further include: exhaust gas flow computing unit is used for when engine operates normally, by described
Flow modificatory coefficient corrects new charge amount, and determines that EGR is useless according to the difference of the total air inflow of engine and new charge amount
Throughput.
Further, the system further include: judging unit, for judging whether the flow modificatory coefficient is in setting threshold
It is worth in range, if it is, not being modified to actual measurement air input of engine by air, is otherwise modified.
As it can be seen that the present invention provides a kind of modified method and system of air input of engine by air, by calibration unit to engine
The corresponding volumetric efficiency of operating condition is demarcated, to form corresponding table of the operating condition with volumetric efficiency, and by computing unit according to correspondence
Meter calculates the engine theory air inflow under corresponding operating condition, makes it and surveys the ratio of air input of engine by air as correction value.Solution
When certainly existing vehicle control exhaust gas flow carries out target of the EGR to reduce NOX, easily because the deviation of air flow sensor, makes
The inaccuracy of engine air air inlet measurement, cause engine discharge and oil consumption increase the problem of, engine can be improved
Can, reducing air flow sensor measurement drift bring influences.
Structure, feature and effect of the invention, the above institute is described in detail according to diagrammatically shown embodiment above
Only presently preferred embodiments of the present invention is stated, but the present invention does not limit the scope of implementation as shown in the drawings, it is all according to structure of the invention
Think made change or equivalent example modified to equivalent change, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (10)
1. a kind of modified method of air input of engine by air characterized by comprising
By the different engine speed of Bench calibration and the corresponding volumetric efficiency of engine torque, imitated with forming operating condition and inflation
The correspondence table of rate, and the corresponding table is stored in Engine ECU；
Self study working condition is set, when engine meets the self study working condition, according to the operating condition of engine and institute
Corresponding table is stated, engine theory air inflow is calculated；
The practical air inflow of engine is acquired by air flow meter, the engine theory air inflow and the engine is practical
The ratio of air inflow is as flow modificatory coefficient；
Using the flow modificatory coefficient as the correction value of actual measurement air input of engine by air, and store into Engine ECU.
2. the method for air input of engine by air self study according to claim 1, which is characterized in that the setting self study work
Condition condition includes:
EGR valve is closed, and by the aperture regulation of booster to 100%；
Engine speed is greater than 2500rpm；
Inlet manifold pressure is greater than 1800kpa；
Inlet manifold temperature is greater than 90 DEG C.
3. the method for air input of engine by air self study according to claim 1, which is characterized in that described according to engine
Operating condition and the corresponding table, are calculated engine theory air inflow, comprising:
According to the operating condition of engine obtain inlet manifold temperature, inlet manifold pressure, engine single chamber volume, engine torque and
Engine speed；
Corresponding volumetric efficiency is obtained according to engine speed, engine torque and the corresponding table；
According to formula:Engine theory air inflow is calculated, wherein m' is engine theory air inflow, P
For inlet manifold pressure, T is inlet manifold temperature, and V is engine single chamber volume, and R is gas constant, and η is intake efficiency.
4. the method for air input of engine by air self study according to claim 1, which is characterized in that further include:
When engine operates normally, new charge amount is corrected by the flow modificatory coefficient, and according to the total air inlet of engine
It measures with the difference of new charge amount and determines EGR exhaust flow.
5. the method for air input of engine by air self study according to any one of claims 1 to 4, which is characterized in that further include:
Judge whether the flow modificatory coefficient is within the scope of given threshold, if it is, not to actual measurement air input of engine by air
It is modified, is otherwise modified.
6. a kind of modified system of air input of engine by air characterized by comprising
Unit is demarcated, for the engine speed and engine torque corresponding volumetric efficiency different by Bench calibration, with shape
It is stored in Engine ECU at the corresponding table of operating condition and volumetric efficiency, and by the corresponding table；
Self study unit, for self study working condition to be arranged, when engine meets the self study working condition, according to hair
The operating condition of motivation and the corresponding table, are calculated engine theory air inflow；
Computing unit, for acquiring the practical air inflow of engine by air flow meter, by the engine theory air inflow and
The ratio of the practical air inflow of engine is as flow modificatory coefficient；
Amending unit for using the flow modificatory coefficient as the correction value of actual measurement air input of engine by air, and is stored to starting
In machine ECU.
7. the system of air input of engine by air self study according to claim 6, which is characterized in that the self study unit packet
It includes:
Setting unit, for closing EGR valve, and by the aperture regulation of booster to 100%；
Revolving speed judging unit, for determining whether engine speed is greater than 2500rpm；
Pressure judging unit, for determining whether inlet manifold pressure is greater than 1800kpa；
Temperature determination unit, for determining whether inlet manifold temperature is greater than 90 DEG C.
8. the system of air input of engine by air self study according to claim 6, which is characterized in that the computing unit packet
It includes:
Get parms unit, obtains inlet manifold temperature, inlet manifold pressure, engine single cylinder for the operating condition according to engine
Volume, engine torque and engine speed；
Lookup unit, for obtaining corresponding volumetric efficiency according to engine speed, engine torque and the corresponding table；
Air inflow computing unit, for according to formula:Engine theory air inflow is calculated, wherein m'
For engine theory air inflow, P is inlet manifold pressure, and T is inlet manifold temperature, and V is engine single chamber volume, and R is gas
Constant, η are intake efficiency.
9. the system of air input of engine by air self study according to claim 6, which is characterized in that further include:
Exhaust gas flow computing unit, for correcting new charge by the flow modificatory coefficient when engine operates normally
Amount, and EGR exhaust flow is determined according to the difference of the total air inflow of engine and new charge amount.
10. according to the system of the described in any item air input of engine by air self studies of claim 6 to 9, which is characterized in that also wrap
It includes:
Judging unit, for judging whether the flow modificatory coefficient is within the scope of given threshold, if it is, not to actual measurement
Air input of engine by air is modified, and is otherwise modified.
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Cited By (16)
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| CN110469416A (en) * | 2019-09-29 | 2019-11-19 | 潍柴动力股份有限公司 | A kind of engine control, control device and engine |
| CN110926821A (en) * | 2019-11-28 | 2020-03-27 | 哈尔滨东安汽车动力股份有限公司 | Method for evaluating accuracy of engine inflation model |
| CN111006867A (en) * | 2019-11-26 | 2020-04-14 | 广西玉柴机器股份有限公司 | Calibration method of engine air intake correction map table and air intake correction method |
| CN111189514A (en) * | 2019-12-31 | 2020-05-22 | 潍柴动力股份有限公司 | Mass flow sensor output correction method, mass flow sensor output correction device, mass flow sensor output correction controller and medium |
| CN111720224A (en) * | 2019-03-18 | 2020-09-29 | 上海汽车集团股份有限公司 | Method and system for correcting inflation efficiency |
| CN111736456A (en) * | 2020-06-24 | 2020-10-02 | 中国重汽集团济南动力有限公司 | Control and diagnosis mechanism of EGR (exhaust gas Recirculation) system, heavy-duty car and method |
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| CN113153543A (en) * | 2021-03-18 | 2021-07-23 | 联合汽车电子有限公司 | Air intake load model correction method and vehicle |
| CN113417776A (en) * | 2021-07-26 | 2021-09-21 | 潍柴动力股份有限公司 | Flow measuring method and controller |
| CN113550825A (en) * | 2020-04-24 | 2021-10-26 | 北京福田康明斯发动机有限公司 | Self-adaptive type air inlet pressure system diagnosis method and device for diesel engine |
| CN114087068A (en) * | 2021-10-28 | 2022-02-25 | 东风越野车有限公司 | Diesel engine intake air flow calculation system and equipment |
| CN114563535A (en) * | 2022-03-03 | 2022-05-31 | 潍柴动力股份有限公司 | Atmospheric self-calibration method for oxygen sensor of V-shaped gas engine |
| CN114962026A (en) * | 2022-05-09 | 2022-08-30 | 潍柴动力股份有限公司 | Method and device for correcting set value of intake air flow, electronic device, and storage medium |
| CN115217645A (en) * | 2021-06-22 | 2022-10-21 | 广州汽车集团股份有限公司 | Engine air inflow control method, system, controller and storage medium |
| CN116066266A (en) * | 2021-10-29 | 2023-05-05 | 北汽福田汽车股份有限公司 | Exhaust gas recirculation system fault detection method and device, storage medium and vehicle |
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Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 No. 669 Shixin Road, Taohua Industrial Park, Hefei City, Anhui Province Applicant before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
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Application publication date: 20190125 |