EP4530459A1 - Motorsteuerungsverfahren, -vorrichtung und -vorrichtung sowie computerlesbares speichermedium - Google Patents

Motorsteuerungsverfahren, -vorrichtung und -vorrichtung sowie computerlesbares speichermedium Download PDF

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Publication number
EP4530459A1
EP4530459A1 EP24825372.6A EP24825372A EP4530459A1 EP 4530459 A1 EP4530459 A1 EP 4530459A1 EP 24825372 A EP24825372 A EP 24825372A EP 4530459 A1 EP4530459 A1 EP 4530459A1
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EP
European Patent Office
Prior art keywords
engine
preset
fuel
controlling
concentration
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
Application number
EP24825372.6A
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English (en)
French (fr)
Inventor
Yu Gao
Chao Zhang
Minhua Chen
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Tianjin Alcohol Hydrogen Research And Development Co Ltd
Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely Farizon New Energy Commercial Vehicle Group Co Ltd
Original Assignee
Tianjin Alcohol Hydrogen Research And Development Co Ltd
Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely Farizon New Energy Commercial Vehicle Group Co Ltd
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Application filed by Tianjin Alcohol Hydrogen Research And Development Co Ltd, Zhejiang Geely Holding Group Co Ltd, Zhejiang Geely Farizon New Energy Commercial Vehicle Group Co Ltd filed Critical Tianjin Alcohol Hydrogen Research And Development Co Ltd
Publication of EP4530459A1 publication Critical patent/EP4530459A1/de
Pending legal-status Critical Current

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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
    • F02D41/0002—Controlling intake air
    • 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
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/146—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an NOx content or concentration
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D43/00—Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0626—Measuring or estimating parameters related to the fuel supply system
    • F02D19/0628—Determining the fuel pressure, temperature or flow, the fuel tank fill level or a valve position
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/224—Diagnosis of the fuel system
    • 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
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0611—Fuel type, fuel composition or fuel quality
    • 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
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0611—Fuel type, fuel composition or fuel quality
    • F02D2200/0612—Fuel type, fuel composition or fuel quality determined by estimation
    • 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
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0806—NOx storage amount, i.e. amount of NOx stored on NOx trap
    • 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
    • F02D2250/00—Engine control related to specific problems or objectives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/36—Control for minimising NOx emissions

Definitions

  • the present application relates to the technical field of automobile control, and in particular to a method, an apparatus and a device for controlling an engine, and a computer-readable storage medium.
  • the vehicle controls the intake pressure of the engine to control the intake volume of the engine fuel combustion process, thereby controlling the products of engine fuel combustion and minimizing the amount of pollutants in the engine exhaust gas.
  • it is mainly through measuring the concentration of oxygen in the exhaust gas and the injection pressure of the fuel, and controlling the intake pressure, so as to keep the intake volume within a reasonable range. If the concentration of oxygen in the engine exhaust gas is too high, it means that the engine intake volume is too large, and incomplete combustion of fuel will lead to an increase in pollutants. At this time, the engine intake volume should be reduced. Similarly, if the concentration of oxygen is too low, incomplete combustion of fuel will also occur, resulting in an increase in pollutants. At this time, the engine intake volume should be increased.
  • the products of fuel combustion are not only related to the intake volume, but also to the fuel quality.
  • the control is performed by the above control method, if the change in concentration of oxygen is caused by fuel quality, then the adjustment of fuel injection pressure and intake volume according to concentration of oxygen is inaccurate, and incomplete combustion of fuel may still occur, resulting in an increase of pollutants in exhaust gas.
  • the main purpose of the present application is to provide a method, an apparatus and a device for controlling an engine, and a computer-readable storage medium, aiming to provide a method for controlling an engine based on fuel quality, improve the control accuracy of controlling engine intake pressure, and reduce the pollution of engine exhaust gas.
  • the present application provides a method for controlling an engine, including:
  • the method before the obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter, the method further includes:
  • the obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter includes:
  • the method before the detecting whether the operating working condition of the engine reaches the preset working condition, the method further includes:
  • the method for controlling the engine further includes:
  • the determining the fuel quality factor from the preset ignition control diagram based on the concentration of the nitrogen oxide and the engine torque includes:
  • controlling the intake pressure of the engine includes:
  • an apparatus for controlling an engine including:
  • the present application also provides a device for controlling an engine, including: a memory, a processor, and a program for controlling an engine stored in the memory and executable on the processor, and the program for controlling the engine is configured to implement the method for controlling the engine.
  • the present application also provides a computer-readable storage medium, a program for controlling an engine is stored in the computer-readable storage medium, and when the program for controlling the engine is performed by a processor, the method for controlling the engine is implemented.
  • the concentration of the nitrogen oxide in the exhaust gas emitted by the engine is obtained at least once through the NOx sensor provided at the upstream of the three-way catalytic converter, and the engine torque corresponding to the concentration of the nitrogen oxide is obtained; based on the concentration of the nitrogen oxide and the engine torque, the fuel quality factor is determined from the preset ignition control diagram; if the fuel quality factor is within the first preset range, the fuel quality is determined to be normal, and the intake pressure of the engine is controlled.
  • the present application realizes the detection of the fuel quality in the engine before the intake pressure of the engine is controlled, and the control of the intake pressure of the engine is performed based on the fuel quality when the fuel quality is normal, so that the interference of the fuel quality on the intake pressure is considered in the process of controlling the intake pressure, and the accuracy of controlling the engine intake pressure is improved, thereby reducing the pollution of the engine exhaust gas.
  • FIG. 1 is a schematic structural diagram of a device of a hardware operating environment involved in an embodiment of the present application.
  • the device for controlling the engine in the embodiment of the present application can be a vehicle controller or a device that establishes a communication connection with the vehicle controller, such as a computer, a server, etc., which are not specifically limited here.
  • the device for controlling the engine may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002.
  • the communication bus 1002 is configured to realize the connection and communication between these components.
  • the user interface 1003 may include a display screen, an input unit such as a keyboard, and the user interface 1003 may also include a standard wired interface and a wireless interface.
  • the network interface 1004 may include a standard wired interface and a wireless interface (such as a WI-FI interface).
  • the memory 1005 may be a high-speed RAM memory or a non-volatile memory, such as a disk memory.
  • the memory 1005 may also be a storage apparatus independent of the processor 1001.
  • FIG. 1 does not constitute a limitation on the device for controlling the engine, which may include more or less components than shown in the figure, or combine certain components, or with different configuration.
  • the memory 1005 may include an operating system, a network communication module, a user interface module, and a program for controlling an engine.
  • the operating system is a program that manages and controls the hardware and software resources of the device, and supports the operation of the program for controlling the engine and other software or programs.
  • the user interface 1003 is mainly configured for data communication with the client;
  • the network interface 1004 is mainly configured to establish a communication connection with the server; and
  • the processor 1001 can be used to call the program for controlling the engine stored in the memory 1005 and perform the following operations:
  • the method before the obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter, the method further includes:
  • the obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter includes:
  • the method before the detecting whether the operating working condition of the engine reaches the preset working condition, the method also includes:
  • the method for controlling the engine further includes:
  • the determining the fuel quality factor from the preset ignition control diagram based on the concentration of the nitrogen oxide and the engine torque includes:
  • controlling the intake pressure of the engine includes:
  • FIG. 2 is a schematic flow chart of a method for controlling an engine according to a first embodiment of the present application.
  • the present application provides an embodiment of a method for controlling an engine. It should be noted that, although the logical order is shown in the flowchart, in some cases, the steps shown or described can be performed in a different order from that shown here.
  • the method for controlling the engine can be applied to a vehicle controller, or a device that establishes a communication connection with the vehicle controller, such as a computer, a server, etc.
  • the method for controlling the engine includes:
  • Step S10 obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter, and obtaining the engine torque corresponding to the concentration of the nitrogen oxide.
  • the present self-adaption control process of the engine intake pressure is: measuring the concentration of oxygen of the exhaust gas through an oxygen sensor; determining the fuel oil injection pressure of the engine based on the concentration of oxygen, thereby determining the engine intake pressure; and controlling the engine intake based on the determined intake pressure.
  • the amount of fuel oil sprayed by the injector will decrease, and the concentration of oxygen in the exhaust gas will increase.
  • the fuel oil injection pressure and intake pressure of the engine will be increased so that the fuel oil can be completely combusted and the pollution of the exhaust gas can be reduced.
  • the problem is that the fuel quality changes, such as the fuel calorific value decreases, then even if the fuel pressure is normal, it will still cause incomplete combustion of the fuel, resulting in an increase in concentration of oxygen.
  • the engine fuel oil injection pressure will still be increased, but due to the problem of fuel quality, the intake air volume required for complete combustion of the fuel has changed, that is, the correlation between the injection pressure and the intake pressure has changed. If the engine fuel oil injection pressure is still controlled according to the previous fuel quality, the incomplete combustion of the fuel may still occur.
  • this embodiment provides a method for controlling the engine intake pressure based on the fuel quality. By detecting the fuel quality before controlling the intake pressure, the accurate control of the engine intake pressure is achieved.
  • the fuel quality referred to in this embodiment may refer to the calorific value of the fuel, the content of impurities in the fuel, or other indicators related to the fuel quality, which are not limited here.
  • the exhaust gas emitted by the engine upstream of the three-way catalytic converter is referred as the exhaust gas emission of the engine.
  • the incomplete combustion may be caused by engine parts problems (such as injector aging, injector consistency problems, etc.), and changes in fuel quality.
  • the concentration of NOx in the exhaust gas emitted by the engine is different.
  • the incomplete combustion caused by engine parts problems is caused by the mismatch between the fuel amount and the air amount. Under this problem, the concentration of NOx in the exhaust gas emission under the same working condition will not change; while the incomplete combustion caused by the fuel quality will cause the concentration of NOx in the exhaust gas emission to increase. Therefore, in this embodiment, the fuel quality factor is determined based on the NOx in the exhaust gas emission.
  • the fuel quality factor can represent the quality of the fuel. For example, as for the fuel calorific value, the larger the fuel quality factor is, the higher the fuel calorific value is.
  • the three-way catalytic converter is configured to convert harmful gases such as CO, HC and NOx in the exhaust gas emission into harmless carbon dioxide, water and nitrogen through oxidation and reduction.
  • obtaining the concentration of NOx in the exhaust gas emission of the engine provided at the upstream of the three-way catalytic converter can be obtaining by the NOx sensor provided at the upstream of the three-way catalytic converter.
  • the concentration of NOx can be obtained for a plurality of times, and the fuel quality factor can be determined based on the plurality of concentrations of NOx to improve the accuracy of the fuel quality factor; or the concentration of NOx can be obtained once, and the fuel quality factor can be determined based on one concentration of NOx to reduce the detection step and improve the detection efficiency, which is not limited here.
  • the engine torque corresponding to the concentration of the nitrogen oxide is also obtained, that is, the concentration of the nitrogen oxide and the engine torque are obtained at the same time.
  • the specific method of obtaining torque is not limited here. For example, in one feasible implementation, it can be to determine the time of obtaining the concentration of the nitrogen oxide, and determine the engine torque at that time from the vehicle operation data according to the time; in another feasible implementation, it can also be to determine the vehicle working condition when the concentration of the nitrogen oxide is obtained, and determine the engine torque according to the working condition.
  • Step S20 determine the fuel quality factor from the preset ignition control diagram based on the concentration of the nitrogen oxide and the engine torque.
  • a management absolute pressure (MAP) diagram with concentration of NOx and engine torque as independent variables and fuel quality factor as dependent variables is preset, which is referred as the ignition control diagram for convenience of description.
  • the preset ignition control diagram can be obtained by testing on a bench using fuel of different qualities through a single variable experiment. The specific test process is not repeated here.
  • the fuel quality factor is determined from the preset ignition control diagram.
  • the preset ignition control diagram can also be with the fuel calorific value as dependent variables, that is, the fuel calorific value is determined from the preset ignition control diagram based on the concentration of the nitrogen oxide and the engine torque; and the quality factor is determined according to the mapping relationship between the fuel calorific value and the quality factor. The higher the fuel calorific value is, the higher the quality factor is.
  • step S30 in response to that the fuel quality factor is within the first preset range, controlling the intake pressure of the engine based on the fuel quality factor.
  • the fuel quality factor after determining the fuel quality factor, detect whether the fuel quality factor is within a preset reasonable range (hereinafter referred as the first preset range for distinction). If the fuel quality factor is within the first preset range, it is determined that the fuel quality is within a reasonable range, and the fuel can be used for engine operation. At this time, considering the impact of fuel quality changes on the engine intake pressure, the engine intake pressure is controlled based on the fuel quality factor, so that the current intake pressure is determined based on the fuel quality of the current engine fuel, thereby improving the accuracy of the intake pressure control.
  • the first preset range for distinction
  • a fuel quality factor over-limit fault is reported, prompting the user to check the fuel quality.
  • the concentration of the nitrogen oxide in the exhaust gas emitted by the engine is obtained at least once by the NOx sensor provided at the upstream of the provided three-way catalytic converter, and the engine torque corresponding to the concentration of the nitrogen oxide is obtained; the fuel quality factor is determined from the preset ignition control diagram based on the concentration of the nitrogen oxide and the engine torque; if the fuel quality factor is within the first preset range, the fuel quality is determined to be normal, and the intake pressure of the engine is controlled.
  • This embodiment realizes the detection of the fuel quality in the engine before the intake pressure of the engine is controlled, and the control of the intake pressure of the engine is based on the fuel quality when the fuel quality is normal, so that the interference of the fuel quality on the intake pressure is considered in the process of controlling the intake pressure, and the accuracy of controlling the engine intake pressure is improved, thereby reducing the pollution in the engine exhaust gas.
  • a second embodiment of the method for controlling the engine of the present application is provided.
  • the method before step S 10, the method also includes: step S40, detecting whether the operating working condition of the engine reaches the preset working condition, and the preset working condition is the working condition point where the difference between the fuel quality factors of different quality fuels exceeds the preset value.
  • the operating working condition (hereinafter referred as preset working condition for distinction) for determining the fuel quality factor is preset.
  • the preset working condition can be determined according to the ignition control diagram, specifically, the working condition point corresponding to the torque where the difference between the fuel quality factors of different quality fuels exceeds the preset value can be selected as the preset working condition, or the preset working condition can be set according to actual needs, which is not limited here.
  • detecting whether the operating working condition of the engine reaches the preset working condition can be determining whether the operating working condition reaches the preset working condition by comparing the torque result.
  • the operating torque of the engine is the same as the torque of the preset working condition, it is determined that the operating working condition reaches the preset working condition.
  • it can also be determined whether the operating working condition reaches the preset working condition according to the engine speed. The specific determination method is the same as that of the torque.
  • Step S50 in response to that the operating working condition reaches the preset working condition, performing the obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter.
  • the operating working condition reaches the preset working condition, it is determined that the engine is in a working condition with a significant difference in the fuel quality factor. At this time, a more accurate fuel quality factor can be obtained. Therefore, the obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter is performed.
  • the step S50 includes: step S501, in response to that the engine reaches the preset working condition, detecting whether the operating duration of the engine under the operating working condition reaches the first preset duration.
  • the engine if the engine reaches the preset working condition, detecting whether the operating duration of the engine under the operating working condition reaches the first preset duration, so as to determine whether the vehicle is running stably.
  • step S502 if the operating duration reaches the first preset duration, performing the obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter.
  • the fuel quality factor can be determined to control the intake pressure, and the obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter can be performed.
  • the intake pressure can be adjusted according to the self-adaption factor corresponding to the concentration of oxygen to reduce the pollution in the engine exhaust gas.
  • the method before the step S40, the method also includes: step S60, detecting whether the new fuel is injected into the engine.
  • the engine before determining the fuel quality factor and adjusting the intake pressure according to the fuel quality factor, it can detect whether the new fuel is injected into the engine.
  • step S70 in response to that the new fuel is injected into the engine, performing the obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter.
  • the intake pressure can be adjusted according to the previous fuel quality factor; the intake pressure can also be adjusted according to the self-adaption factor corresponding to the concentration of oxygen.
  • the method for controlling the engine further includes: step S80, monitoring the fuel liquid level in the engine.
  • monitoring the fuel liquid level in the engine to determine whether the new fuel is injected into the engine is based on the fuel liquid level in the engine.
  • the step S60 includes: step S601, detecting whether the fuel liquid level satisfies the preset condition, and the preset condition is that the changing value of the fuel liquid level in the second preset duration exceeds the second preset range.
  • a preset condition representing the injection of new fuel is preset.
  • the preset condition is that the changing value of the fuel liquid level in the second preset duration exceeds the second preset range, that is, the preset condition represents that the engine fuel has increased significantly in the second preset duration.
  • the preset condition can also limit the liquid level before the fuel liquid level changes (hereinafter referred as the baseline liquid level for distinction) to be lower than the preset liquid level.
  • the preset liquid level can be set according to actual needs.
  • Step S602 in response to that the fuel liquid level satisfies the preset condition, determining that the new fuel is injected into the engine.
  • the fuel liquid level satisfies the preset condition, it is determined that the engine fuel has increased significantly (i.e., the second preset range) within the second preset duration, and it is determined that the new fuel is injected into the engine.
  • Step S603 in response to that the fuel liquid level does not satisfy the preset condition, determining that no new fuel is injected into the engine.
  • the fuel liquid level does not satisfy the preset condition, it is determined that the engine fuel has not increased significantly (i.e., the second preset range) within the second preset duration, which may be that the new fuel is injected into the engine for a plurality of times in small amounts, or that only a small amount of the new fuel is injected into the engine, or that no new fuel is injected.
  • the above possible situations are all regarded as no new fuel is injected into the engine.
  • the operating working condition of the engine is detected to determine whether it reaches the preset working condition, and the preset working condition is the working condition point where the difference between the fuel quality factors of different quality fuels exceeds the preset value. If the operating working condition reaches the preset working condition, the obtaining the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter is performed.
  • This implementation can obtain a more accurate fuel quality factor, thereby improving the accuracy of the intake pressure control and reducing the pollution in the exhaust gas.
  • the step S20 includes: step S201, determining a plurality of control factors from the preset ignition control diagram respectively based on each of the concentration of the nitrogen oxides and the corresponding engine torque.
  • control factors are determined from the preset ignition control diagram respectively based on each of the concentration of the nitrogen oxides and the corresponding engine torque.
  • step S202 obtaining the fuel quality factor based on a plurality of control factors.
  • the fuel quality factor is obtained based on a plurality of control factors.
  • the average value of a plurality of control factors may be taken as the fuel quality factor, which is not limited here, and can be set according to actual needs.
  • the step S30 includes: step S301, obtaining the actual injection duration by multiplying the fuel quality factor by the injection duration of the engine.
  • the actual injection duration is obtained by multiplying the fuel quality factor by the injection duration of the engine (i.e., the duration of the injector injecting fuel oil), and the injection amount of the fuel oil can be controlled by controlling the injection duration.
  • step S302 controlling the intake pressure of the engine based on the actual injection duration. The longer the actual injection duration is, the greater the intake pressure is.
  • the injection pressure is maintained at a constant value (hereinafter referred to as the preset pressure constant value for distinction), that is, the injection pressure of the injector is constant per unit time. Therefore, the actual injection amount of fuel oil can be determined based on the actual injection duration.
  • the actual injection amount of fuel oil is determined based on the actual injection duration, and the required amount of air is determined according to the actual injection amount, so that the intake pressure of the engine is obtained and the intake pressure of the engine can be controlled.
  • the self-adaption factor of the fuel oil injection pressure can also be determined based on the concentration of oxygen; the adjustment factor can be obtained by multiplying the self-adaption factor by the fuel oil injection factor; and the actual injection duration is obtained by calculating the adjustment factor and the injection duration. That is, the influence of the engine zero component problem on the intake pressure is also considered, so as to further improve the accuracy of the intake pressure control and reduce the pollution in the exhaust gas.
  • a plurality of control factors are determined from the preset ignition control diagram based on each concentration of nitrogen oxide and the corresponding engine torque; and the fuel quality factor is calculated based on the plurality of control factors.
  • concentration of NOx for a plurality of times and determining fuel quality factor based on the plurality of concentrations of NOx, the accuracy of the fuel quality factor can be improved, thereby improving the accuracy of the intake control.
  • the control process for controlling the intake pressure can be: monitoring the fuel liquid level of the engine, and detecting whether the new fuel is injected into the engine based on fuel liquid level. In an embodiment, it can be detected that when the fuel liquid level increases from an empty position to a full position, it is considered that a new box of fuel is added.
  • whether the fuel self-adaption calculation is completed for the newly added fuel is detected, and the self-adaption calculation refers to the entire process of adjusting the intake pressure based on the fuel quality factor. If the self-adaption calculation is completed, the self-adaption calculation for the fuel in the tank is stopped; and if the self-adaption calculation is not completed, the self-adaption function is activated to perform the self-adaption calculation for the fuel in the tank.
  • the self-adaption calculation detecting whether the engine operating working condition reaches the preset working condition, and whether the operating duration under the working condition reaches the preset duration. If the operating working condition reaches the preset working condition and the operating duration of the engine under the working condition reaches the preset duration, the concentration of the nitrogen oxide in the exhaust gas emitted by the engine is obtained for a plurality of times through the NOx sensor provided at the upstream of the three-way catalytic converter, and the engine torque corresponding to the concentration of the nitrogen oxide is obtained; a plurality of control factors are determined from the preset ignition control diagram based on the concentration of the nitrogen oxide and the engine torque; and the fuel quality factor is calculated based on each control factor. If the operating working condition does not reach the preset working condition or the operating duration of the engine under the working condition does not reach the preset duration, it is returned to detect whether the fuel self-adaption calculation is completed for the newly added fuel.
  • the intake pressure of the engine is controlled based on the fuel quality factor.
  • the specific correction process is to correct the injection amount of the engine according to the fuel quality factor, and correct the intake pressure, so as to ensure that the output torque after correction will not change due to the fuel quality. If the fuel quality factor exceeds the preset range, a self-adaption factor over-limit fault is reported to remind the user to check the fuel quality.
  • the present application also provides an apparatus for controlling an engine.
  • the apparatus for controlling the engine includes: an obtaining module 10, a determining module 20, and a control module 30.
  • the obtaining module 10 is configured to obtain the concentration of the nitrogen oxide in the exhaust gas emitted by the engine at least once through the NOx sensor provided at the upstream of the three-way catalytic converter, and obtain the engine torque corresponding to the concentration of the nitrogen oxide.
  • the determining module 20 is configured to determine the fuel quality factor from the preset ignition control diagram based on the concentration of the nitrogen oxide and the engine torque.
  • the control module 30 is configured to control the intake pressure of the engine based on the fuel quality factor in response to that the fuel quality factor is within the first preset range.
  • the apparatus for controlling the engine further includes a detecting module configured to:
  • the detecting module is also configured to:
  • the detecting module is also configured to:
  • the apparatus for controlling the engine also includes a monitoring module configured to: monitor the fuel liquid level in the engine.
  • the detecting module is also configured to:
  • the determination module 20 is also configured to:
  • the adjustment module is also configured to:
  • the various embodiments of the apparatus for controlling the engine of the present application may refer to the various embodiments of the method for controlling the engine of the present application, which will not be repeated here.
  • the embodiment of the present application also provides a computer-readable storage medium, on which a program for controlling an engine is stored, and when the program for controlling the engine is performed by a processor, the method for controlling the engine described above is implemented.
  • the various embodiments of the device for controlling the engine and computer-readable storage medium of the present application may refer to the various embodiments of the method for controlling the engine of the present application, which will not be repeated here.
  • the above embodiment method can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is a better implementation method.
  • the technical solution of this application, or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a computer-readable storage medium (such as ROM/RAM, disk, CD) as mentioned above, and includes several instructions for a device for controlling an engine (which can be a mobile phone, computer, server, or network device, etc.) to perform the methods described in each embodiment of the present application.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP24825372.6A 2023-06-28 2024-06-27 Motorsteuerungsverfahren, -vorrichtung und -vorrichtung sowie computerlesbares speichermedium Pending EP4530459A1 (de)

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PCT/CN2024/102086 WO2025002279A1 (zh) 2023-06-28 2024-06-27 发动机控制方法、装置、设备及计算机可读存储介质

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CN116591837B (zh) * 2023-06-28 2025-07-15 浙江吉利控股集团有限公司 发动机控制方法、装置、设备及计算机可读存储介质

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JPH08210171A (ja) * 1995-02-03 1996-08-20 Komatsu Ltd エンジンの排気エミッション制御装置
JP2003056369A (ja) * 2001-08-16 2003-02-26 Tokyo Gas Co Ltd ガスタービン及びその運転制御方法
JP5095973B2 (ja) * 2006-09-25 2012-12-12 本田技研工業株式会社 多種類燃料エンジン用燃料噴射制御装置
JP5042105B2 (ja) * 2008-03-31 2012-10-03 本田技研工業株式会社 多種燃料エンジンの燃料噴射制御装置
US9255542B2 (en) * 2013-02-04 2016-02-09 Ford Global Technologies, Llc System and method for compensating biodiesel fuel
CN110296012A (zh) * 2019-06-29 2019-10-01 潍柴动力股份有限公司 一种发动机燃料喷射控制方法、装置、存储介质和计算机设备
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