A method and related device for improving engine braking power regulation efficiency

Abstract

The present invention discloses a method and related device for improving the efficiency of engine braking power regulation, which are used to improve the efficiency of engine braking power regulation. The method of the present invention includes: when the engine enters braking mode, obtaining the state of the engine's forced stop injection strategy; determining whether the forced stop injection strategy state is activated; if it is activated, adjusting the opening of the engine's EGR valve to a controllable variable so that the engine can regulate the engine's braking power by simultaneously adjusting the opening of the EGR valve and the opening of the throttle valve; if it is not activated, controlling and adjusting the throttle valve opening to regulate the engine's braking power.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of engines, and in particular to a method and related devices for improving the efficiency of engine braking power regulation. Background Art

[0002] With the development of technology, people's requirements for vehicle performance are increasing. In order to meet people's needs and improve the performance of vehicles while driving, improving engine performance has become more important.

[0003] In the prior art, during post-treatment regeneration, the engine will still be in a fuel injection state when the vehicle brakes. If the engine in this state adjusts the braking power by controlling the opening of the EGR valve, the injected diesel will enter the cylinder through the EGR valve. To avoid this situation, the prior art locks the EGR valve when the engine is injecting fuel, so that the engine can only adjust the braking power by adjusting the opening of the throttle, thereby reducing the efficiency of adjusting the braking power. Summary of the Invention

[0004] The embodiments of the present application provide a method and related device for improving the braking power regulation efficiency of an engine, which are used to improve the braking power regulation efficiency of an engine.

[0005] A first aspect of the present application provides a method for improving engine braking power regulation efficiency, comprising:

[0006] When the engine enters a braking mode, obtaining a forced stop fuel injection strategy state of the engine;

[0007] Determining whether the forced stop fuel injection strategy state is enabled;

[0008] If the engine is started, the opening of the EGR valve of the engine is adjusted to a controllable variable, so that the braking power of the engine can be adjusted by simultaneously adjusting the opening of the EGR valve and the opening of the throttle valve;

[0009] If the engine is not started, the throttle opening is controlled to adjust the braking power of the engine.

[0010] Optionally, before obtaining the engine forced fuel injection stop strategy, the method further includes:

[0011] It is determined whether the engine enters a braking mode.

[0012] If the braking mode is not entered, the current operating state of the engine is maintained.

[0013] Optionally, after adjusting the opening of the EGR valve of the engine to a controllable variable, the method further includes:

[0014] Obtaining a first opening calibration value of the EGR valve and a second opening calibration value of the throttle valve;

[0015] The openings of the EGR valve and the throttle valve are controlled according to the first opening calibration value and the second opening calibration value.

[0016] Optionally, after controlling and adjusting the throttle opening to brake the engine, the method further includes:

[0017] Obtaining a third calibrated opening value of the throttle valve;

[0018] The throttle valve opening is controlled according to the third opening calibration value.

[0019] A second aspect of the present application provides a device for improving engine braking power regulation efficiency, comprising:

[0020] a first acquiring unit, configured to acquire a forced fuel injection stop strategy state of the engine when the engine enters a braking mode;

[0021] a first judging unit, configured to judge whether the state of the forced fuel injection stop strategy is enabled;

[0022] an adjusting unit, configured to adjust the opening of the EGR valve of the engine to a controllable variable when the judgment result of the first judging unit is start;

[0023] The first control unit is configured to control and adjust the throttle opening to adjust the braking power of the engine when the judgment result of the first judgment unit is not started.

[0024] Optionally, before obtaining the engine forced fuel injection stop strategy, the method further includes:

[0025] The second judgment unit is used to judge whether the engine enters the braking mode.

[0026] A maintaining unit is used to maintain the current operating state of the engine when the second determining unit determines that the engine has not entered the braking mode.

[0027] Optionally, after adjusting the opening of the EGR valve of the engine to a controllable variable, the method further includes:

[0028] a second acquiring unit, configured to acquire a first opening calibration value of the EGR valve and a second opening calibration value of the throttle valve;

[0029] The second control unit is used to control the opening of the EGR valve and the throttle valve according to the first opening calibration value and the second opening calibration value.

[0030] Optionally, after controlling and adjusting the throttle opening to brake the engine, the method further includes:

[0031] a third acquiring unit, configured to acquire a third calibrated opening value of the throttle valve;

[0032] A third control unit is used to control the opening of the throttle valve according to the third opening calibration value.

[0033] A third aspect of the present application provides a device for improving engine braking power regulation efficiency, comprising:

[0034] Processor, memory, input and output unit, bus;

[0035] The processor is connected to the memory, the input and output unit, and the bus;

[0036] The processor specifically performs the same operations as the aforementioned first aspect.

[0037] It can be seen from the above technical solution that the present application adds a forced injection stop strategy to the engine's operating strategy, so that the engine is forced to stop injecting fuel during braking, thereby providing an environment for adjusting the opening of the EGR valve, so that when the engine is braked, the engine's braking power can be controlled simultaneously through the EGR valve and the throttle, thereby achieving the purpose of improving the efficiency of adjusting the braking power. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a flow chart of an embodiment of a method for improving engine brake power regulation efficiency in an embodiment of the present application;

[0039] Figure 2 This is a flow chart of another embodiment of a method for improving engine brake power regulation efficiency in an embodiment of the present application;

[0040] Figure 3 This is a schematic structural diagram of an embodiment of a device for improving engine braking power regulation efficiency in an embodiment of the present application;

[0041] Figure 4 This is a structural schematic diagram of another embodiment of the device for improving the engine braking power regulation efficiency in the embodiment of the present application;

[0042] Figure 5 This is a structural schematic diagram of another embodiment of the device for improving the engine braking power regulation efficiency in the embodiment of the present application. DETAILED DESCRIPTION

[0043] The embodiments of the present application provide a method and related device for improving the braking power regulation efficiency of an engine, which are used to improve the braking power regulation efficiency of an engine.

[0044] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] The execution entities in the application embodiments include, but are not limited to, all devices including terminals, servers, and systems that include logical computing and operating capabilities. No specific limitations are made here. The embodiments of this application are described using an engine controller as an example.

[0046] See also Figure 1 The present application provides a method for improving engine braking power regulation efficiency, including:

[0047] 101. When the engine enters a braking mode, obtaining a forced stop fuel injection strategy state of the engine;

[0048] In actual situations, whether the engine enters braking mode is determined by the brake signal. When the vehicle brakes, the engine will enter braking mode. When the engine enters braking mode, the engine controller will process the braking control strategy according to the current operating strategy in the engine. To this end, the engine controller will obtain the status of the forced injection strategy.

[0049] 102. Determine whether the forced stop fuel injection strategy is in the enabled state;

[0050] After the engine enters the braking mode, the engine controller will confirm the engine's operating strategy, that is, whether the engine has started the fuel injection stop strategy. If so, step 103 is executed; if not, step 104 is executed.

[0051] 103. If the engine is started, adjusting the opening of the EGR valve of the engine to a controllable variable so that the engine braking power can be adjusted by simultaneously adjusting the opening of the EGR valve and the opening of the throttle valve;

[0052] To ensure that diesel does not return to the cylinder through the EGR valve when the engine is spraying fuel, in actual practice, the EGR valve must be closed when the engine is spraying fuel. However, in actual practice, the engine adjusts the braking power through the throttle and EGR valve at the same time during braking, which can enable the engine to achieve the braking purpose faster. Therefore, when the engine operation strategy is equipped with an engine stop injection strategy, the engine will be forced to stop injecting fuel after entering the braking state, thereby avoiding the situation where diesel enters the cylinder through the EGR valve when the EGR valve is opened to adjust the braking power during braking.

[0053] 104. If the engine is not started, the throttle opening is controlled and adjusted to adjust the braking power of the engine.

[0054] If the engine controller does not have a fuel injection stop strategy set, it means that the engine may be injecting fuel while braking. When the engine's fuel injection status cannot be determined, the engine will only adjust the engine's braking power by adjusting the throttle opening.

[0055] It can be seen from the above technical solution that the present application adds a forced injection stop strategy to the engine's operating strategy, so that the engine is forced to stop injecting fuel during braking, thereby providing an environment for adjusting the opening of the EGR valve, so that when the engine is braked, the engine's braking power can be controlled simultaneously through the EGR valve and the throttle, thereby achieving the purpose of improving the efficiency of adjusting the braking power.

[0056] See also Figure 2 The present application provides another embodiment of a method for improving engine braking power regulation efficiency, including:

[0057] 201. Determine whether the engine enters a braking mode.

[0058] The braking mode is the prerequisite for the engine controller to determine whether the forced stop injection strategy is enabled. Therefore, before determining the state of the engine's forced injection strategy, the engine controller needs to determine the current operating mode of the engine. If the engine controller determines that the current engine has not entered the braking mode, step 202 is executed. If the engine controller determines that the current engine has entered the braking mode, step 203 is executed.

[0059] 202. If the braking mode is not entered, the current operating state of the engine is maintained.

[0060] If the engine controller determines that the operating state of the engine has not entered the braking mode, it means that the current engine does not need to adjust the braking power, and thus the engine controller does not need to change the control strategy of the engine.

[0061] 203. When the engine enters a braking mode, obtaining a forced stop fuel injection strategy state of the engine;

[0062] 204. Determine whether the forced stop fuel injection strategy is in the enabled state;

[0063] 205. If the engine is started, adjusting the opening of the EGR valve of the engine to a controllable variable, so that the engine braking power can be adjusted by simultaneously adjusting the opening of the EGR valve and the opening of the throttle valve;

[0064] Steps 203 to 205 in this embodiment are similar to steps 101 to 103 in the aforementioned embodiment and are not described again here.

[0065] 206. Obtain a first opening calibration value of the EGR valve and a second opening calibration value of the throttle valve;

[0066] In actual usage, adjusting the braking power will directly slow down the vehicle. When the vehicle is decelerating, if the speed is reduced too quickly, it will obviously cause a poor user experience. Therefore, when developing the engine, the opening of the engine's EGR valve and throttle will be restricted according to the expected curve of the braking power change.

[0067] Specifically, the expected curve of braking power change is a curve obtained through user feedback and long-term tests, which is used to indicate that the vehicle can give the user a more comfortable physical feedback when the engine is in a braking state. During the test, the engine speed during braking is limited according to the curve, and a speed curve reference value is obtained. When the engine is tested on an actual machine, the opening of the EGR valve and the throttle is adjusted and controlled with reference to the speed curve reference value until the speed curve obtained from the actual machine test matches the speed curve reference value. At this time, the opening ranges of the EGR valve and the throttle obtained are respectively identified as the first opening calibration value corresponding to the EGR valve opening calibration value and the second calibration value corresponding to the throttle opening calibration value.

[0068] 207. Control the openings of the EGR valve and the throttle valve according to the first opening calibration value and the second opening calibration value.

[0069] After the engine controller determines the first opening calibration value and the second opening calibration value, the engine controller controls the opening of the EGR valve and the throttle valve according to the calibration values, so that the engine can brake according to the expected curve of the braking power change.

[0070] 208. If the engine is not started, the throttle opening is controlled to adjust the braking power of the engine.

[0071] Step 208 in this embodiment is similar to step 104 in the aforementioned embodiment and will not be described again here.

[0072] 209. Obtain a third calibrated opening value of the throttle valve;

[0073] If the forced injection stop strategy does not exist or is not started in the current engine operation strategy, the engine controller will brake the engine by controlling the throttle opening, which is the same as the method in step 206. The third opening calibration value is the opening threshold that meets the speed curve obtained after the throttle passes the speed curve experiment.

[0074] 210. Control the opening of the throttle valve according to the third opening calibration value.

[0075] After the engine controller determines the third opening calibration value corresponding to the throttle valve, the engine controller controls the throttle valve opening according to the third opening calibration value.

[0076] In the embodiments of this application, the calibration value is essentially an operating curve. When applied to the opening calibration value, it is considered a curve with time as the horizontal axis and the opening change as the vertical axis. Specifically, during engine operation, a curve is generated over time as the opening changes from closed to peak, allowing the engine controller to control the opening in accordance with the desired curve of brake power changes.

[0077] In the embodiment of the present application, by obtaining the opening calibration values ​​of the EGR valve and the throttle valve, the opening of the EGR valve and the throttle valve is controlled, so that the safety of the engine operation is improved when the engine controller controls the engine.

[0078] The above is a detailed description of the method for improving the engine braking power regulation efficiency in the embodiment of the present application. The following is a detailed description of the device for improving the engine braking power regulation efficiency.

[0079] See also Figure 3 The present application provides an embodiment of a device for improving engine braking power regulation efficiency, comprising:

[0080] The first acquisition unit 301 is configured to acquire a forced fuel injection stop strategy state of the engine when the engine enters a braking mode;

[0081] The first judgment unit 302 is used to judge whether the state of the forced stop injection strategy is started;

[0082] an adjusting unit 303, configured to adjust the opening of the EGR valve of the engine to a controllable variable when the judgment result of the first judging unit is start;

[0083] The first control unit 304 is configured to control and adjust the throttle opening to adjust the braking power of the engine when the judgment result of the first judgment unit is not started.

[0084] In this embodiment, the functions of each unit are the same as those described above. Figure 1 The steps in the illustrated embodiment correspond to each other and will not be repeated here.

[0085] See also Figure 4 The present application provides an embodiment of a device for improving engine braking power regulation efficiency, comprising:

[0086] The second judging unit 401 is configured to judge whether the engine enters a braking mode.

[0087] The maintaining unit 402 is configured to maintain the current operating state of the engine when the second determining unit determines that the engine has not entered the braking mode.

[0088] A first acquiring unit 403 is configured to acquire a forced fuel injection stop strategy state of the engine when the engine enters a braking mode;

[0089] The first judgment unit 404 is used to judge whether the state of the forced stop injection strategy is activated;

[0090] an adjusting unit 405 for adjusting the opening of the EGR valve of the engine to a controllable variable when the judgment result of the first judging unit is start;

[0091] A second acquiring unit 406 is configured to acquire a first opening calibration value of the EGR valve and a second opening calibration value of the throttle valve;

[0092] The second control unit 407 is configured to control the openings of the EGR valve and the throttle valve according to the first opening calibration value and the second opening calibration value.

[0093] The first control unit 408 is configured to control and adjust the throttle opening to adjust the braking power of the engine when the judgment result of the first judgment unit is not started.

[0094] A third acquiring unit 409 is configured to acquire a third calibrated opening value of the throttle valve;

[0095] The third control unit 410 is configured to control the opening of the throttle valve according to the third opening calibration value.

[0096] In this embodiment, the functions of each unit are the same as those described above. Figure 2 The steps in the illustrated embodiment correspond to each other and will not be repeated here.

[0097] See also Figure 5Another embodiment of the device of the embodiment of the present application includes:

[0098] Processor 501, memory 502, input and output unit 503, bus 504;

[0099] The processor 501 is connected to the memory 502, the input and output unit 503 and the bus 504;

[0100] The processor 501 specifically performs Figures 1 to 2 The operations corresponding to the steps in the method are not described in detail here.

[0101] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0102] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0103] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0104] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0105] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), disk or optical disk, and other media that can store program code.

Claims

1. A method for improving engine braking power regulation efficiency, characterized in that: include: When the engine enters a braking mode, obtaining a forced stop fuel injection strategy state of the engine; Determining whether the forced stop fuel injection strategy state is enabled; If the engine is started, the opening of the EGR valve of the engine is adjusted to a controllable variable, so that the braking power of the engine can be adjusted by simultaneously adjusting the opening of the EGR valve and the opening of the throttle valve; If the engine is not started, the throttle opening is controlled and adjusted to adjust the braking power of the engine.

2. The method according to claim 1, characterized in that Before obtaining the engine forced fuel injection stop strategy, the method further includes: determining whether the engine enters a braking mode; If the braking mode is not entered, the current operating state of the engine is maintained.

3. The method according to claim 1, characterized in that After adjusting the opening of the EGR valve of the engine to a controllable variable, the method further includes: Obtaining a first opening calibration value of the EGR valve and a second opening calibration value of the throttle valve; The openings of the EGR valve and the throttle valve are controlled according to the first opening calibration value and the second opening calibration value.

4. The method according to any one of claims 1 to 3, characterized in that After controlling and adjusting the throttle opening to brake the engine, the method further includes: Obtaining a third calibrated opening value of the throttle valve; The throttle valve opening is controlled according to the third opening calibration value.

5. A device for improving the efficiency of engine braking power regulation, characterized in that: include: a first acquiring unit, configured to acquire a forced fuel injection stop strategy state of the engine when the engine enters a braking mode; a first judging unit, configured to judge whether the state of the forced fuel injection stop strategy is enabled; an adjusting unit, configured to adjust the opening of the EGR valve of the engine to a controllable variable when the judgment result of the first judging unit is start; The first control unit is configured to control and adjust the throttle opening to adjust the braking power of the engine when the judgment result of the first judgment unit is not started.

6. The device according to claim 5, characterized in that Before obtaining the engine forced fuel injection stop strategy, the device further includes: a second determining unit, configured to determine whether the engine enters a braking mode; A maintaining unit is used to maintain the current operating state of the engine when the second determining unit determines that the engine has not entered the braking mode.

7. The device according to claim 5, characterized in that After adjusting the opening of the EGR valve of the engine to a controllable variable, the device further includes: a second acquiring unit, configured to acquire a first opening calibration value of the EGR valve and a second opening calibration value of the throttle valve; The second control unit is used to control the opening of the EGR valve and the throttle valve according to the first opening calibration value and the second opening calibration value.

8. The device according to any one of claims 5 to 6, characterized in that After the throttle opening is controlled and adjusted to brake the engine, the device further comprises: a third acquiring unit, configured to acquire a third calibrated opening value of the throttle valve; A third control unit is used to control the opening of the throttle valve according to the third opening calibration value.

9. A device for improving the efficiency of engine braking power regulation, characterized in that: include: Processor, memory, input and output unit, bus; The processor is connected to the memory, the input and output unit, and the bus; The processor specifically performs the following operations: When the engine enters a braking mode, obtaining a forced stop fuel injection strategy state of the engine; Determining whether the forced stop fuel injection strategy state is enabled; If the engine is started, the opening of the EGR valve of the engine is adjusted to a controllable variable, so that the braking power of the engine can be adjusted by simultaneously adjusting the opening of the EGR valve and the opening of the throttle valve; If the engine is not started, the throttle opening is controlled to adjust the braking power of the engine.

10. A computer-readable storage medium having a program stored thereon, wherein the program, when executed on a computer, performs the method according to any one of claims 1 to 4.

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