Engine operating condition adjustment method and device

Abstract

The present application provides an engine operating condition adjustment method and device, the method comprising: obtaining the required power generation of the range extender of the vehicle; controlling the operation of the engine in the range extender according to the required power generation; obtaining the carbon load of the current particulate matter trap DPF of the vehicle; if the carbon load does not exceed the carbon load threshold, and the regeneration interval of the DPF is greater than the preset time limit, or the carbon load exceeds the preset carbon load limit, then detecting whether the current operating condition of the engine is within the preset correction range; if the current operating condition of the engine is within the correction range, then determining the equal power line corresponding to the current operating condition of the engine on the engine operating condition diagram of the engine; adjusting the operating condition of the engine according to the equal power line so that the operating condition of the engine is not within the correction range. Applying the method provided by the present application, the operating condition of the engine can be adjusted, the temperature of the DPF can be increased, and the number of active regenerations can be reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method and device for adjusting engine operating conditions. Background Art

[0002] In modern diesel engine technology, in order to reduce emissions and comply with increasingly stringent environmental regulations, diesel engine aftertreatment systems are widely used. Among them, the diesel particulate filter (DPF) is a key component, and its main function is to effectively capture and store soot particles in the engine exhaust, thereby significantly reducing particulate matter emissions. The application of this technology has greatly improved the environmental performance of diesel engines and has become one of the important means of diesel engine emission control.

[0003] However, as the engine runs longer, the carbon load inside the DPF will continue to accumulate. When the carbon load reaches a certain level, it will not only affect the DPF's capture efficiency, but may also increase the exhaust back pressure, thereby affecting the engine's power and economy. More seriously, excessive carbon load may also cause DPF overload, or even cause blockage, causing damage to the engine and post-processing system.

[0004] In order to solve this problem, active regeneration technology is currently widely used to clean the DPF regularly. Active regeneration technology increases the temperature inside the DPF to cause the captured soot particles to undergo an oxidation reaction, thereby converting them into harmless carbon dioxide and water vapor for discharge. Although this process effectively solves the problem of excessive carbon loading in the DPF, it also brings about the problem of resource consumption. Active regeneration usually requires additional fuel or electricity to provide sufficient heat to achieve the oxidation reaction of soot particles. This not only increases the energy consumption of the engine, but may also have a negative impact on the overall economy of the vehicle. Summary of the invention

[0005] The technical problem to be solved by the present application is to provide an engine operating condition adjustment method that can reduce the number of active regeneration times.

[0006] The present application also provides an engine operating condition adjustment device to ensure the implementation and application of the above method in practice.

[0007] Obtaining the required power generation power of the vehicle's range extender;

[0008] Controlling the operation of the engine in the range extender according to the required power generation;

[0009] Obtaining the carbon load of the current DPF of the vehicle;

[0010] If the carbon load does not exceed the carbon load threshold, and the regeneration interval of the DPF is greater than a preset time limit, or the carbon load exceeds a preset carbon load limit, detecting whether the current operating condition of the engine is within a preset correction range;

[0011] When the current operating condition of the engine is within the correction range, determining an equal power line corresponding to the current operating condition of the engine on an engine operating condition diagram of the engine;

[0012] The operating condition of the engine is adjusted according to the equal power line so that the operating condition of the engine is not within the correction range.

[0013] In the above method, optionally, the detecting whether the current operating condition of the engine is within a preset correction range includes:

[0014] detecting whether the current operating condition of the engine is below a correction dividing line of an engine operating condition map of the engine;

[0015] When it is detected that the current operating condition of the engine is below the correction boundary line of the engine operating condition map of the engine, it is determined that the current operating condition of the engine is within a preset correction range.

[0016] In the above method, optionally, adjusting the operating condition of the engine according to the equal power line includes:

[0017] The engine speed is controlled to be reduced according to the equal power line, and the engine torque is controlled to be increased, so that the operating condition of the engine moves along the equal power line to the correction dividing line.

[0018] The above method, optionally, after adjusting the operating condition of the engine according to the equal power line, further comprises:

[0019] At least one of the advance angle, post-injection parameters and throttle valve opening of the engine is adjusted to increase the exhaust temperature of the engine.

[0020] The above method, optionally, after adjusting the operating condition of the engine according to the equal power line, further comprises:

[0021] After a preset time period, the regeneration interval time of the DPF is reset to zero.

[0022] An engine operating condition regulating device, comprising:

[0023] A first execution unit is used to obtain the required power generation power of the range extender of the vehicle;

[0024] a control unit, configured to control the operation of the engine in the range extender according to the required power generation;

[0025] An acquisition unit, used for acquiring the carbon load of the current DPF of the vehicle;

[0026] a detection unit, configured to detect whether the current operating condition of the engine is within a preset correction range when the carbon load does not exceed the carbon load threshold and the regeneration interval of the DPF is greater than a preset time limit, or when the carbon load exceeds a preset carbon load limit;

[0027] a determination unit, configured to determine, when the current operating condition of the engine is within the correction range, an equal power line corresponding to the current operating condition of the engine on an engine operating condition diagram of the engine;

[0028] The first regulating unit is used to regulate the operating condition of the engine according to the equal power line so that the operating condition of the engine is not within the correction range.

[0029] In the above device, optionally, the detection unit comprises:

[0030] a detection subunit, used for detecting whether the current operating condition of the engine is below a correction dividing line of an engine operating condition diagram of the engine;

[0031] The determination subunit is used to determine that the current operating condition of the engine is within a preset correction range when it is detected that the current operating condition of the engine is below the correction boundary line of the engine operating condition map of the engine.

[0032] In the above device, optionally, the adjusting unit comprises:

[0033] A control subunit is used to control the engine speed to decrease according to the equal power line, and control the engine torque to increase, so that the operating condition of the engine moves along the equal power line to the correction dividing line.

[0034] The above device may optionally further include:

[0035] The second regulating unit is used to adjust at least one of the advance angle, post-injection parameters and throttle valve opening of the engine to increase the exhaust temperature of the engine.

[0036] The above device may optionally further include:

[0037] The second execution unit is used to reset the regeneration interval time of the DPF to zero after a preset time period.

[0038] Compared with the prior art, this application has the following advantages:

[0039] The present application provides a method and device for determining an exhaust gas aftertreatment system, the method comprising: obtaining the required power generation of a vehicle's range extender; controlling the operation of the engine in the range extender according to the required power generation; obtaining the carbon load of the vehicle's current particulate matter trap DPF; if the carbon load does not exceed the carbon load threshold, and the regeneration interval of the DPF is greater than the preset time limit, or the carbon load exceeds the preset carbon load limit, then detecting whether the current operating condition of the engine is within the preset correction range; if the current operating condition of the engine is within the correction range, then determining the equal power line corresponding to the current operating condition of the engine on the engine operating condition diagram of the engine; adjusting the operating condition of the engine according to the equal power line so that the operating condition of the engine is not within the correction range. Applying the method provided by the present application, the operating condition of the engine can be adjusted to increase the DPF temperature, thereby reducing the number of active regenerations. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0041] Figure 1 A flow chart of an engine operating condition adjustment method provided in this application;

[0042] Figure 2 A flowchart of a process for detecting whether the current operating condition of an engine is within a preset correction range provided by the present application;

[0043] Figure 3 An exemplary engine operating diagram provided for this application;

[0044] Figure 4 A flow chart of an engine operating condition adjustment process provided in this application;

[0045] Figure 5 A schematic diagram of the structure of an engine operating condition adjustment device provided in this application;

[0046] Figure 6 A schematic diagram of the structure of an electronic device provided in this application. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0049] Based on this, an embodiment of the present application provides an engine operating condition adjustment method, which can be applied to electronic equipment, and the electronic equipment may include a transmission control unit TCU, an ECU (Electronic Control Unit), a VCU (Vehicle Control Unit), an MCU (Micro Controller Unit), an HCU (Hybrid Control Unit), a server, a PC, a PAD, a mobile phone, or one or more thereof; the method flow chart of the method is as follows Figure 1 As shown, specifically including:

[0050] S101: Obtaining the required power generation power of the range extender of the vehicle.

[0051] In this embodiment, the vehicle's range extender may be composed of an engine and a generator.

[0052] S102: Controlling the operation of the engine in the range extender according to the required power generation power.

[0053] In this embodiment, the engine operation is controlled by the required power generation, so that the engine drives the generator to generate power, and the power generation of the engine meets the required power generation.

[0054] Optionally, an initial operating point of required starting power may be determined, and the engine may be controlled to operate at the initial operating point, wherein the initial operating point includes information such as initial speed and initial torque.

[0055] S103: Obtain the current carbon load of the DPF of the vehicle.

[0056] In this embodiment, the exhaust temperature, exhaust pressure and other parameters before and after the DPF may be measured by sensors, and then the carbon load of the DPF may be calculated based on the measured parameters using a preset algorithm or model.

[0057] S104: If the carbon load does not exceed the carbon load threshold and the regeneration interval of the DPF system is greater than a preset time limit, or the carbon load exceeds a preset carbon load limit, then detect whether the current operating condition of the engine is within a preset correction range.

[0058] In this embodiment, the carbon load can be compared with a preset carbon load threshold to determine whether the carbon load is greater than the carbon load threshold; if the carbon load is greater than the carbon load threshold, it is possible to detect whether the current operating condition of the engine is within the correction range; if the carbon load is not greater than the carbon load threshold, it is determined whether the regeneration interval of the DPF is greater than the preset time limit; if the regeneration interval is greater than the time limit, it is detected whether the current operating condition of the engine is within the correction range; if the regeneration interval is not greater than the time limit, it is possible to return to S103 to execute the acquisition of the current carbon load of the vehicle's particulate matter trap DPF.

[0059] In this embodiment, the correction range can be determined based on a correction boundary line preset on an engine operating condition map, and the engine operating condition includes the engine torque and speed.

[0060] Optionally, the horizontal axis in the engine operating condition diagram represents the engine speed, and the vertical axis represents the engine torque, power, etc.

[0061] Optionally, the regeneration interval may be a time interval for performing a regeneration operation after the engine has run for a period of time.

[0062] In an embodiment provided in the present application, based on the above implementation process, optionally, the process of detecting whether the current operating condition of the engine is within a preset correction range is as follows: Figure 2 As shown, including:

[0063] S201: Detect whether the current operating condition of the engine is below a correction boundary line of an engine operating condition map of the engine.

[0064] Optionally, the correction boundary line of the engine operating condition diagram may be a line obtained by fitting based on pre-calibrated critical points of various correction operating conditions.

[0065] S202: When it is detected that the current operating condition of the engine is below a correction boundary line of an engine operating condition map of the engine, determining that the current operating condition of the engine is within a preset correction range.

[0066] In this embodiment, see Figure 3 If the current operating condition of the engine is on the correction dividing line, or above the correction dividing line, it can be determined that the current operating condition of the engine is not within the correction range; if the current operating condition of the engine is below the correction dividing line, it can be determined that the current operating condition of the engine is within the correction range.

[0067] S105: When the current operating condition of the engine is within the correction range, determining an equal power line corresponding to the current operating condition of the engine on an engine operating condition diagram of the engine.

[0068] In this embodiment, the power of each operating condition point on the equal power line is consistent.

[0069] S106: Adjusting the operating condition of the engine according to the equal power line so that the operating condition of the engine is not within the correction range.

[0070] In this embodiment, the operating condition of the engine may be adjusted first according to the equal power, so that the operating condition of the engine moves out of the correction range along the equal power line.

[0071] In an embodiment provided in the present application, based on the above implementation process, optionally, the process of adjusting the operating condition of the engine according to the equal power line includes:

[0072] The engine speed is controlled to decrease according to the isopower line, and the engine torque is controlled to increase, so that the operating condition of the engine moves along the isopower line to the correction boundary line, thereby increasing the DPF temperature.

[0073] By applying the method provided in the present application, the operating conditions of the engine can be adjusted to increase the DPF temperature, thereby reducing the number of active regeneration times.

[0074] In an embodiment provided by the present application, based on the above implementation process, optionally, after adjusting the operating condition of the engine according to the equal power line, the method further includes:

[0075] At least one of the advance angle, post-injection parameters and throttle valve opening of the engine is adjusted to increase the exhaust temperature of the engine.

[0076] In this embodiment, the engine can be switched to a preset micro-regeneration mode so that the engine adjusts at least one of the advance angle, post-injection parameters and throttle valve opening of the engine to increase the exhaust temperature of the engine.

[0077] In an embodiment provided by the present application, based on the above implementation process, optionally, after adjusting the operating condition of the engine according to the equal power line, the method further includes:

[0078] After a preset time period, the regeneration interval time of the DPF system is reset to zero.

[0079] See also Figure 4 , which is a flow chart of an engine operating condition adjustment process provided by the present application, wherein the system inputs the required power generation power of the range extender; reads the real-time carbon load of the DPF and compares it with the carbon load limit. If the carbon load is greater than the carbon load limit, it is necessary to proceed to the next step to determine whether the operating point needs to be corrected;

[0080] If the carbon load is not greater than the carbon load limit, the regeneration interval is judged. If the regeneration interval is not greater than the duration limit, the engine operating point does not need to be corrected. If the regeneration interval is greater than the duration limit, it is also judged whether the operating point needs to be corrected.

[0081] Enter to determine whether the operating point needs to be corrected. It is necessary to judge the extended-range type initial distribution engine operating point. If the operating point is above the engine operating point correction boundary line, no correction is required, and the extended-range type initial distribution operating point is executed; if it is below the engine operating point correction boundary line, the engine operating condition needs to be corrected and enter the next step;

[0082] The method of correcting the engine operating point is to move the engine operating point along the corresponding isopower line to the low speed and high torque to the engine operating point correction boundary line according to the system input range extender required power generation, and at the same time, the engine switches to the micro-regeneration mode, adjusts at least one of the engine advance angle, post-injection and throttle valve, and increases the engine exhaust temperature;

[0083] The timing is performed while entering the engine operating point correction. When the accumulated time is greater than the limit, the regeneration interval time is reset to zero.

[0084] and Figure 1 Corresponding to the method described above, the embodiment of the present application also provides an engine operating condition adjustment device for adjusting Figure 1 The specific implementation of the method is shown in the following diagram: Figure 5 As shown, specifically including:

[0085] The first execution unit 501 is used to obtain the required power generation power of the range extender of the vehicle;

[0086] A control unit 502, configured to control the operation of the engine in the range extender according to the required power generation;

[0087] An acquisition unit 503 is used to acquire the carbon load of the current DPF of the vehicle;

[0088] A detection unit 504 is used to detect whether the current operating condition of the engine is within a preset correction range when the carbon load does not exceed the carbon load threshold and the regeneration interval of the DPF is greater than a preset time limit, or when the carbon load exceeds a preset carbon load limit;

[0089] A determination unit 505, configured to determine, when the current operating condition of the engine is within the correction range, an equal power line corresponding to the current operating condition of the engine on an engine operating condition diagram of the engine;

[0090] The first regulating unit 506 is used to regulate the operating condition of the engine according to the equal power line so that the operating condition of the engine is not within the correction range.

[0091] In an embodiment provided in the present application, based on the above implementation process, optionally, the detection unit includes:

[0092] a detection subunit, used for detecting whether the current operating condition of the engine is below a correction dividing line of an engine operating condition diagram of the engine;

[0093] The determination subunit is used to determine that the current operating condition of the engine is within a preset correction range when it is detected that the current operating condition of the engine is below the correction boundary line of the engine operating condition map of the engine.

[0094] In an embodiment provided in the present application, based on the above implementation process, optionally, the adjustment unit includes:

[0095] A control subunit is used to control the engine speed to decrease according to the equal power line, and control the engine torque to increase, so that the operating condition of the engine moves along the equal power line to the correction dividing line.

[0096] In an embodiment provided in the present application, based on the above implementation process, optionally, it further includes:

[0097] The second regulating unit is used to adjust at least one of the advance angle, post-injection parameters and throttle valve opening of the engine to increase the exhaust temperature of the engine.

[0098] In an embodiment provided in the present application, based on the above implementation process, optionally, it further includes:

[0099] The second execution unit is used to reset the regeneration interval time of the DPF to zero after a preset time period.

[0100] The specific principles and execution processes of each unit and module in the engine operating condition adjustment device disclosed in the above-mentioned embodiment of the present application are the same as those of the engine operating condition adjustment method disclosed in the above-mentioned embodiment of the present application. Please refer to the corresponding parts of the engine operating condition adjustment method provided in the above-mentioned embodiment of the present application, and will not be repeated here.

[0101] An embodiment of the present application further provides a storage medium, which includes stored instructions, wherein when the instructions are executed, the device where the storage medium is located is controlled to execute the above-mentioned engine operating condition adjustment method.

[0102] The present application also provides an electronic device, whose structural diagram is as follows: Figure 6 As shown, it specifically includes a memory 601 and one or more instructions 602, wherein the one or more instructions 602 are stored in the memory 601 and are configured to be executed by one or more processors 603 to perform the following operations:

[0103] Obtaining the required power generation power of the vehicle's range extender;

[0104] Controlling the operation of the engine in the range extender according to the required power generation;

[0105] Obtaining the carbon load of the current DPF of the vehicle;

[0106] If the carbon load does not exceed the carbon load threshold, and the regeneration interval of the DPF is greater than a preset time limit, or the carbon load exceeds a preset carbon load limit, detecting whether the current operating condition of the engine is within a preset correction range;

[0107] When the current operating condition of the engine is within the correction range, determining an equal power line corresponding to the current operating condition of the engine on an engine operating condition diagram of the engine;

[0108] The operating condition of the engine is adjusted according to the equal power line so that the operating condition of the engine is not within the correction range.

[0109] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0110] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0111] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0112] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0113] The above is a detailed introduction to an engine operating condition adjustment method provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for adjusting engine operating conditions, characterized in that: include: Obtaining the required power generation power of the vehicle's range extender; Controlling the operation of the engine in the range extender according to the required power generation; Obtaining the carbon load of the current DPF of the vehicle; If the carbon load does not exceed the carbon load threshold, and the regeneration interval of the DPF is greater than a preset time limit, or the carbon load exceeds a preset carbon load limit, detecting whether the current operating condition of the engine is within a preset correction range; When the current operating condition of the engine is within the correction range, determining an equal power line corresponding to the current operating condition of the engine on an engine operating condition diagram of the engine; adjusting the operating condition of the engine according to the equal power line so that the operating condition of the engine is not within the correction range; The detecting whether the current operating condition of the engine is within a preset correction range comprises: detecting whether the current operating condition of the engine is below a correction boundary line of an engine operating condition map of the engine; and determining that the current operating condition of the engine is within the preset correction range when it is detected that the current operating condition of the engine is below the correction boundary line of the engine operating condition map of the engine; The adjusting the operating condition of the engine according to the equal power line includes: controlling the speed of the engine to decrease according to the equal power line, and controlling the torque of the engine to increase, so that the operating condition of the engine moves along the equal power line to the correction dividing line.

2. The method according to claim 1, characterized in that: After adjusting the operating condition of the engine according to the equal power line, the method further includes: At least one of the advance angle, post-injection parameters and throttle valve opening of the engine is adjusted to increase the exhaust temperature of the engine.

3. The method according to claim 1, characterized in that After adjusting the operating condition of the engine according to the equal power line, the method further includes: After a preset time period, the regeneration interval time of the DPF is reset to zero.

4. An engine operating condition adjustment device, characterized in that: include: A first execution unit is used to obtain the required power generation power of the range extender of the vehicle; a control unit, configured to control the operation of the engine in the range extender according to the required power generation; An acquisition unit, used for acquiring the carbon load of the current DPF of the vehicle; a detection unit, configured to detect whether the current operating condition of the engine is within a preset correction range when the carbon load does not exceed the carbon load threshold and the regeneration interval of the DPF is greater than a preset time limit, or when the carbon load exceeds a preset carbon load limit; a determining unit, configured to determine, when the current operating condition of the engine is within the correction range, an isopower line corresponding to the current operating condition of the engine on an engine operating condition diagram of the engine; a first regulating unit, configured to regulate the operating condition of the engine according to the equal power line so that the operating condition of the engine is not within the correction range; The detection unit includes: a detection subunit and a determination subunit; the detection subunit is used to detect whether the current operating condition of the engine is below the correction boundary line of the engine operating condition map of the engine; the determination subunit is used to determine that the current operating condition of the engine is within a preset correction range when it is detected that the current operating condition of the engine is below the correction boundary line of the engine operating condition map of the engine; The regulating unit includes: a control subunit, which is used to control the engine speed to decrease according to the equal power line, and control the engine torque to increase, so that the operating condition of the engine moves along the equal power line to the correction dividing line.

5. The device according to claim 4, characterized in that Also includes: The second regulating unit is used to adjust at least one of the advance angle, post-injection parameters and throttle valve opening of the engine to increase the exhaust temperature of the engine.

6. The device according to claim 4, characterized in that Also includes: The second execution unit is used to reset the regeneration interval time of the DPF to zero after a preset time period.

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