Electronic water pump compensation control method, device, system, vehicle, medium and equipment

Abstract

The application aims at solving the problem that high compression ratio, Miller cycle or Atkinson cycle engine is easy to generate knock, which leads to power decline and engine thermal efficiency decline, and provides an electronic water pump compensation control method, device, system, vehicle, medium and equipment when engine knock occurs. The method comprises the following steps: under the current engine working condition, it is judged whether the electronic water pump knock compensation function is started due to engine knock; if the electronic water pump knock compensation function is started due to engine knock, the initial value and the compensation value of the operating parameter of the electronic water pump under the current engine working condition are determined; and the operating parameter of the electronic water pump is started based on the compensation value and the initial value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engine control using electronic main water pump, and more particularly to an electronic water pump compensation control method, device, system, vehicle, medium and equipment for engine knock. BACKGROUND

[0002] To improve the thermal efficiency of the engine, the combination of Atkinson cycle, high compression ratio and electronic main water pump has been widely used in the existing field. Compared with the traditional mechanical water pump, the electronic main water pump of the engine can provide appropriate cooling flow and cooling intensity according to the engine operating condition, so as to reduce unnecessary energy consumption of the engine to the greatest extent.

[0003] For the engine using Atkinson cycle with high compression ratio, the current design and control strategy of the electronic main water pump mainly ensures that the full-power full-flow operation is started to meet the cooling demand only in the high-temperature, high-speed and high-load operating point; in the non-knock area, the power is as small as possible and the flow is as low as possible to reduce unnecessary energy consumption; in the low-speed medium-load and high-speed medium-load knock area, the tendency of knock is mainly reduced, and the power consumption is as low as possible, so the electronic main water pump does not work at full power in these areas. The specific power of the engine in each operating area is usually determined by using a design median engine for bench testing under specific boundary conditions to cover the spread of the mass-produced engine. The specific boundary conditions of the above bench testing process include: 1) the design median engine is used for the calibration engine; 2) the fixed value of the engine water outlet temperature, which can be distinguished according to the speed-load; 3) the ignition angle control is within the knock boundary and there is no knock combustion in each operating point; 4) in the non-external characteristic area, the minimum fuel consumption is used as the selection standard of the main pulse spectrum table of the electronic main water pump, and in the external characteristic area, the maximum output torque is used as the selection standard of the main pulse spectrum table of the electronic main water pump.

[0004] From the bench testing process of the main control pulse spectrum of the electronic main water pump, it is obvious that the influence of knock and water temperature on the working power of the main water pump has been considered. However, for the engine using Atkinson cycle with high compression ratio, the parameters affecting the engine knock, such as the deviation of the engine static compression ratio, the deviation of the intake and exhaust phase, the deviation of the flow resistance coefficient of the cylinder block and head water jacket, and the deviation of the electronic water pump flow characteristic, etc., even within the design allowable deviation range, may cause the mass-produced engine deviating from the design median value to appear knock combustion. In the existing engine management system EMS logic, for the knock of the mass-produced engine, only the knock diagnosis function can be used to solve the problem by delaying the ignition angle of the corresponding cylinder to reduce the tendency of knock after diagnosing the knock combustion: for strong knock, the method of advancing the retarding ignition angle is used to prevent knock. Regardless of which method is used, retarding the ignition angle will reduce the thermal efficiency and the power of the engine. SUMMARY

[0005] The application aims to solve the problem that high compression ratio, Miller cycle or Atkinson cycle engines are prone to knock, which leads to power reduction and engine thermal efficiency reduction, and provides an electronic water pump compensation control method, device, system, vehicle, medium and equipment for engine knock.

[0006] The technical scheme of the application is:

[0007] The application provides an electronic water pump compensation control method for engine knock, comprising:

[0008] In the current engine operating condition, it is determined whether to start the electronic water pump knock compensation function due to engine knock;

[0009] If the electronic water pump knock compensation function is started due to engine knock, the initial value and the compensation value of the operating parameter of the electronic water pump in the current engine operating condition are determined;

[0010] The operating parameter of the electronic water pump is controlled to be started based on the compensation value and the initial value of the operating parameter.

[0011] Preferably, the step of determining the compensation value of the operating parameter of the electronic water pump in the current engine operating condition comprises:

[0012] The historical compensation value of the operating parameter of the electronic water pump at the last start is obtained;

[0013] The self-learning parameter offset value corresponding to the current operating parameter of the electronic water pump is determined;

[0014] The historical compensation value of the operating parameter of the electronic water pump at the last start and the self-learning parameter offset value corresponding to the current operating parameter are added to obtain the initial compensation value of the operating parameter of the electronic water pump;

[0015] According to the initial value of the operating parameter of the electronic water pump in the current engine operating condition, the margin value of the operating parameter of the electronic water pump in the current engine operating condition is determined;

[0016] Based on the initial compensation value and the margin value of the operating parameter of the electronic water pump, the compensation value of the operating parameter of the electronic water pump in the current engine operating condition is determined;

[0017] The margin value of the operating parameter of the electronic water pump = the maximum value of the operating parameter of the electronic water pump - the initial value of the operating parameter of the electronic water pump in the current engine operating condition.

[0018] Preferably, the self-learning parameter offset value corresponding to the current operating parameter of the electric water pump is n% of the maximum value of the operating parameter of the electric water pump; n is calibrated according to the engine speed and engine load under the current engine operating condition.

[0019] Preferably, the step of determining the parameter compensation value of the operating parameter of the electric water pump under the current engine operating condition based on the initial parameter compensation value and the parameter margin value corresponding to the operating parameter of the electric water pump comprises:

[0020] Taking the minimum of the initial parameter compensation value and the parameter margin value corresponding to the operating parameter of the electric water pump, the parameter compensation value of the operating parameter of the electric water pump under the current engine operating condition is obtained.

[0021] Preferably, the step of determining whether to start the knock compensation function of the electric water pump due to engine knock comprises:

[0022] determining whether the current engine operating condition is in a preset engine knock operating condition region;

[0023] If the current engine operating condition is in the preset engine knock operating condition region, determining whether engine knock occurs based on the knock diagnosis flag of each cylinder of the engine;

[0024] If engine knock occurs, determining whether to start the knock compensation function of the electric water pump based on the average value of the knock-induced retreat spark angle of each cylinder.

[0025] Preferably, if the knock diagnosis flag of at least one cylinder is set, it is determined that engine knock occurs.

[0026] Preferably, if the average value of the knock-induced retreat spark angle of each cylinder is greater than or equal to a preset average value of the retreat spark angle, it is determined to start the knock compensation function of the electric water pump;

[0027] If the average value of the knock-induced retreat spark angle of each cylinder is less than the preset average value of the retreat spark angle, it is determined not to start the knock compensation function of the electric water pump.

[0028] Preferably, the operating parameter of the electric water pump is the rotational speed or flow rate of the electric water pump.

[0029] Preferably, the step of controlling the operating parameter of the electric water pump to start based on the parameter compensation value and the initial value of the parameter comprises:

[0030] Controlling the operating parameter of the electric water pump to start according to the sum of the parameter compensation value and the initial value of the parameter.

[0031] The application also provides an electronic water pump compensation control device for engine knock, comprising:

[0032] The electronic water pump knock compensation function start judgment module is configured to determine whether to start the electronic water pump knock compensation function due to engine knock under the current engine operating condition.

[0033] The electronic water pump operating parameter value determination module is configured to determine the initial parameter value and the parameter compensation value of the operating parameter of the electronic water pump under the current engine operating condition if the electronic water pump knock compensation function is started due to engine knock.

[0034] The electronic water pump control module is configured to control the operating parameter of the electronic water pump to start based on the parameter compensation value and the initial parameter value.

[0035] Preferably, the electronic water pump operating parameter value determination module comprises:

[0036] The historical parameter compensation value determination unit is configured to obtain the historical parameter compensation value of the operating parameter of the electronic water pump at the last start;

[0037] The self-learning parameter offset value determination unit is configured to determine the self-learning parameter offset value currently corresponding to the operating parameter of the electronic water pump;

[0038] The initial parameter value determination unit is configured to determine the initial parameter value of the operating parameter of the electronic water pump under the current engine operating condition;

[0039] The initial parameter compensation value determination unit is configured to add the historical parameter compensation value of the operating parameter of the electronic water pump at the last start and the self-learning parameter offset value currently corresponding to the operating parameter to obtain the initial parameter compensation value corresponding to the operating parameter of the electronic water pump;

[0040] The parameter margin value determination unit is configured to determine the parameter margin value corresponding to the operating parameter of the electronic water pump under the current engine operating condition according to the initial parameter value of the operating parameter of the electronic water pump under the current engine operating condition;

[0041] The parameter compensation value determination unit is configured to determine the parameter compensation value of the operating parameter of the electronic water pump under the current engine operating condition based on the initial parameter compensation value and the parameter margin value corresponding to the operating parameter of the electronic water pump;

[0042] The parameter margin value corresponding to the operating parameter of the electronic water pump = the maximum value of the operating parameter of the electronic water pump - the initial parameter value of the operating parameter of the electronic water pump under the current engine operating condition.

[0043] Preferably, the electronic water pump knock compensation function start judgment module comprises:

[0044] The engine current operating condition region judgment unit is configured to determine whether the current engine operating condition is in a preset engine knock operating condition region;

[0045] The engine knock judgment unit is configured to, if the current engine working condition is in a preset engine knock working condition region, judge whether the engine knock occurs based on knock diagnosis flag bits of each cylinder of the engine.

[0046] The electronic water pump knock compensation function start judgment unit is configured to, if the engine knock occurs, judge whether to start the electronic water pump knock compensation function based on an average value of the knock-caused retreat ignition angle of each cylinder.

[0047] Preferably, the method comprises: an electronic water pump control unit, an electronic water pump connected to the electronic water pump control unit, and an engine control unit;

[0048] The electronic water pump control unit judges whether to start the electronic water pump knock compensation function due to the engine knock based on the current engine working condition provided by the engine control unit.

[0049] If the electronic water pump knock compensation function is started due to the engine knock, the initial value and the compensation value of the operating parameter of the electronic water pump under the current engine working condition are determined.

[0050] The operating parameter of the electronic water pump is started based on the compensation value and the initial value.

[0051] The application also provides a vehicle comprising the electronic water pump compensation control device for engine knock as described above.

[0052] The application also provides a control device comprising a processor, a memory, and a program or instruction stored on the memory and executable on the processor, and the program or instruction is executed by the processor to implement the steps of the electronic water pump compensation control method for engine knock as described above.

[0053] The application also provides a readable storage medium, and the readable storage medium stores a program or instruction, and the program or instruction is executed by a processor to implement the steps of the electronic water pump compensation control method for engine knock as described above.

[0054] The application has the following beneficial effects:

[0055] Based on the characteristics that the working capacity of the electronic water pump has a certain margin in most knock regions, when the engine knock occurs, the margin of the electronic water pump is used to increase the cooling intensity under the knock working condition, so as to reduce the knock trend and improve the engine combustion efficiency and engine power. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 FIG. 1 is a schematic diagram of the electronic water pump compensation control method for engine knock in the embodiment of the application;

[0057] Figure 2 A detailed flow chart for step S101 in the embodiment of the present application;

[0058] Figure 3 A detailed flow chart for step S102 in the embodiment of the present application;

[0059] Figure 4 A detailed flow chart for the electronic water pump compensation control method in the case of engine knock in the embodiment of the present application;

[0060] Figure 5 A schematic diagram of the electronic water pump compensation control device in the case of engine knock in the embodiment of the present application;

[0061] Figure 6 A schematic diagram of the electronic water pump compensation control system in the case of engine knock in the embodiment of the present application. DETAILED DESCRIPTION

[0062] The embodiment of the present application provides an electronic water pump compensation control method in the case of engine knock. The method is based on the characteristics that the working capacity of the electronic water pump in most knock regions has a certain margin. In the case of engine knock, the cooling intensity under the knock condition is increased by using the capacity margin of the electronic water pump, so as to reduce the knock trend and improve the engine combustion efficiency and engine power.

[0063] As shown in Figure 1 , the method in the embodiment includes:

[0064] Step S101: determining whether to start the electronic water pump knock compensation function due to engine knock in the current engine condition.

[0065] Firstly, the current engine condition needs to be determined based on the engine water temperature, speed and load signals.

[0066] In the embodiment, when the electronic water pump knock compensation function is closed, the running parameters of the electronic water pump after starting are controlled according to the related logic in the prior art, such as the related logic introduced in the background art of the present solution. The value of the running parameters of the electronic water pump determined according to the processing logic in the prior art is referred to as the initial parameter value in the embodiment.

[0067] And the running parameters output by the electronic water pump after the electronic water pump knock compensation function is started will increase a self-learning value based on the initial parameter value. The self-learning value is used for increasing the cooling intensity under the knock condition mentioned in the above content.

[0068] As shown in Figure 2 , the step S101 specifically includes:

[0069] Step S201, determine whether the current engine working condition is in the preset engine knock working condition region;

[0070] Step S202, if the current engine working condition is in the preset engine knock working condition region, determine whether the engine knock occurs based on the knock diagnosis flag of each cylinder of the engine;

[0071] Step S203, if the engine knock occurs, determine whether to start the electronic water pump knock compensation function based on the average value of the knock-caused retreat spark angle of each cylinder.

[0072] In the above step S201, the preset engine knock working condition region refers to the working condition region in which the electronic water pump knock compensation function works; the preset engine knock working condition region has the following characteristics: 1) the engine is warmed up; 2) the region is sensitive to knock; 3) the electronic water pump works in a non-maximum speed and flow state in the region.

[0073] In this embodiment, whether the current engine working condition is in the preset engine knock region can be determined according to the engine water temperature, speed and load signals. Specifically, if the engine water temperature under the current working condition is less than a preset threshold T, or the engine speed under the current working condition does not meet the set speed range, or the engine load under the current working condition does not meet the set load range, it is determined that the current engine working condition is not in the preset engine knock region; if the engine water temperature under the current working condition is greater than or equal to the preset threshold T, the engine speed under the current working condition meets the set speed range, and the engine load under the current working condition meets the set load range, it is determined that the current engine working condition is in the preset engine knock region. The above-mentioned preset threshold T is generally greater than 60℃ and less than 80℃.

[0074] In step S202, the knock diagnosis flag of each cylinder of the engine is recorded in the engine control unit, and the engine control unit can determine the knock condition of each cylinder of the engine according to the prior art logic. When the engine control unit sets the knock diagnosis flag corresponding to one or more cylinders, it means that the engine control unit determines that one or more cylinders have knock, that is, it is determined that the engine knock occurs.

[0075] In step S203, if the average value of the knock-caused retreat spark angle of each cylinder is greater than or equal to a preset average value of the retreat spark angle, it is determined to start the electronic water pump knock compensation function;

[0076] If the average value of the knock-caused retreat spark angle of each cylinder is less than the preset average value of the retreat spark angle, it is determined not to start the electronic water pump knock compensation function.

[0077] The specific value of the above-mentioned preset average value of the retreat spark angle is generally set to -3 to -6 degrees of crank angle.

[0078] Thus, after the above S201 to S203 are executed, it can be determined whether the engine knocks, and whether the electronic water pump knock compensation function is started, so as to exclude starting the electronic water pump knock compensation function in the non-knock working condition.

[0079] In step S102, if the electronic water pump knock compensation function is started due to the engine knock, the initial value and the compensation value of the operating parameter of the electronic water pump in the current engine working condition are determined.

[0080] In the embodiment, the operating parameter of the electronic water pump can be the rotation speed or the flow of the electronic water pump, and the rotation speed and the flow have a relative relationship, and the compensation of any parameter can represent the compensation of the other parameter.

[0081] For example, the initial value of the operating parameter of the electronic water pump in the current engine working condition is determined according to the following formula: Figure 3 In the embodiment, the step of determining the compensation value of the operating parameter of the electronic water pump in the current engine working condition comprises:

[0082] In step S301, the historical compensation value of the operating parameter of the electronic water pump in the last starting is obtained;

[0083] In step S302, the self-learning parameter offset value corresponding to the current operating parameter of the electronic water pump is determined;

[0084] In step S303, the parameter margin value corresponding to the operating parameter of the electronic water pump in the current engine working condition is determined according to the initial value of the operating parameter of the electronic water pump in the current engine working condition; the parameter margin value corresponding to the operating parameter of the electronic water pump = the maximum value of the operating parameter of the electronic water pump - the initial value of the operating parameter of the electronic water pump in the current engine working condition.

[0085] In step S304, the historical compensation value of the operating parameter of the electronic water pump in the last starting and the self-learning parameter offset value corresponding to the current operating parameter of the electronic water pump are added to obtain the initial compensation value of the operating parameter of the electronic water pump.

[0086] In step S305, the compensation value of the operating parameter of the electronic water pump in the current engine working condition is determined based on the initial compensation value of the operating parameter of the electronic water pump and the parameter margin value.

[0087] The determination method of the initial value of the operating parameter of the electronic water pump in the current engine working condition has been described above, and the determination of the initial value is the determination method in the prior art.

[0088] Wherein, in step S301, if the engine is just started, the initial value of the history parameter compensation value of the operating parameter of the electronic water pump is equal to 0; after the engine is started, the history parameter compensation value is also equal to 0 when the knock compensation function of the electronic water pump is started for the first time; and the corresponding history parameter compensation value is the parameter compensation value calculated for the first time when it is calculated for the second time. The parameter compensation value of the electronic water pump is assigned to 0 when the engine is powered off each time.

[0089] In step S302, the self-learning parameter offset value corresponding to the current operating parameter of the electronic water pump is n% of the current value of the operating parameter of the electronic water pump, and n is calibrated according to the engine speed and engine load under the current engine operating condition, for example, 0.1. At this time, the self-learning parameter offset is calibrated in combination with the current speed or flow of the electronic water pump.

[0090] In step S305, the initial parameter compensation value and the parameter margin value corresponding to the operating parameter of the electronic water pump are taken as the smaller one to obtain the parameter compensation value of the operating parameter of the electronic water pump under the current engine operating condition.

[0091] In this embodiment, the determined initial parameter compensation value is not directly used as the parameter compensation value of the operating parameter of the electronic water pump, which is set considering the capability of the electronic water pump to prevent the capability of the electronic water pump from being unable to provide the initial parameter compensation value.

[0092] In step S103, the operating parameter of the electronic water pump is controlled to start based on the parameter compensation value and the parameter initial value.

[0093] The step S103 is specifically: controlling the operating parameter of the electronic water pump to start according to the sum of the parameter compensation value and the parameter initial value.

[0094] The above-mentioned method of the embodiment is a post-processing measure for reducing knock by increasing the flow of engine coolant through the remaining capability of the electronic water pump after knock occurs in the engine; according to the working characteristics of the electronic water pump, the problem of knock caused by the dispersion of the current high-thermal-efficiency mass-produced engine is solved, and the characteristics of high efficiency of the hybrid engine are maximized.

[0095] The following will be described in detail in combination with the accompanying drawings Figure 4 The specific implementation of the above-mentioned method of the application will be described in detail as follows:

[0096] In step S401, the engine water temperature, engine speed and engine load are obtained.

[0097] In step S402, whether the current engine operating condition is in the preset engine knock operating condition region is judged according to the engine water temperature, engine speed and engine load.

[0098] If the engine water temperature under the current engine operating condition is greater than or equal to a preset threshold T, the engine speed under the current engine operating condition satisfies a set speed range, and the engine load under the current engine operating condition satisfies a set load range, it is determined that the current engine operating condition is in a preset engine knock operating condition region, and step S403 is entered.

[0099] If the engine water temperature under the current engine operating condition is less than the preset threshold T, or the engine speed under the current engine operating condition does not satisfy the set speed range, or the engine load under the current engine operating condition does not satisfy the set load range, it is determined that the current engine operating condition is not in the preset engine knock operating condition region, and step S412 is entered.

[0100] Step S403: Determine whether engine knock occurs based on the knock diagnosis flag of each cylinder of the engine. If the knock diagnosis flag of one or more cylinders is set, it is determined that engine knock occurs, and step S404 is entered. If the knock diagnosis flag of one or more cylinders is not set, it is determined that engine knock does not occur, and the electronic water pump knock compensation function is not started, and step S412 is entered.

[0101] Step S404: Determine whether to start the electronic water pump knock compensation function based on the average value of the knock-induced retreat spark angle of each cylinder. If the average value of the knock-induced retreat spark angle of each cylinder is greater than or equal to a preset average value of the retreat spark angle, it is determined to start the electronic water pump knock compensation function, and steps S405, S406, and S407 are entered. If the average value of the knock-induced retreat spark angle of each cylinder is less than the preset average value of the retreat spark angle, it is determined not to start the electronic water pump knock compensation function, and step S412 is entered.

[0102] Step S405: Obtain the historical parameter compensation value of the operating parameter of the electronic water pump at the last start, and then enter step S408.

[0103] Step S406: Determine the self-learning parameter offset value corresponding to the current operating parameter of the electronic water pump, and then enter step S408.

[0104] Step S407: Determine the initial value of the operating parameter of the electronic water pump under the current engine operating condition, and then enter step S409.

[0105] Step S408: Add the historical parameter compensation value of the operating parameter of the electronic water pump at the last start and the self-learning parameter offset value corresponding to the current operating parameter of the electronic water pump to obtain the initial parameter compensation value corresponding to the operating parameter of the electronic water pump, and then enter step S410.

[0106] Step S409: Determine the parameter margin value corresponding to the operating parameter of the electronic water pump under the current engine operating condition.

[0107] Step S410, taking the minimum of the initial parameter compensation value corresponding to the operating parameter of the electronic water pump and the parameter margin value, to obtain the parameter compensation value of the operating parameter of the electronic water pump under the current engine operating condition, and then entering step S411.

[0108] Step S411, starting the operating parameter of the electronic water pump according to the sum of the parameter compensation value and the parameter initial value.

[0109] Step S412, determining the parameter initial value of the operating parameter of the electronic water pump under the current engine operating condition, and then entering step S413.

[0110] Step S413, starting the operating parameter of the electronic water pump according to the parameter initial value.

[0111] The above method uses the capacity margin of the electronic water pump to increase the cooling intensity under the knocking condition when the engine knocks, so as to reduce the knocking trend and improve the engine combustion efficiency and engine power.

[0112] As Figure 5 The embodiment of the present application also provides an electronic water pump compensation control device for engine knocking, which comprises:

[0113] An electronic water pump knocking compensation function starting judgment module 501 is configured to judge whether to start the electronic water pump knocking compensation function due to engine knocking under the current engine operating condition.

[0114] An electronic water pump operating parameter value determination module 502 is configured to determine the parameter initial value and the parameter compensation value of the operating parameter of the electronic water pump under the current engine operating condition if the electronic water pump knocking compensation function is started due to engine knocking.

[0115] An electronic water pump control module 503 is configured to control the operating parameter of the electronic water pump to start based on the parameter compensation value and the parameter initial value.

[0116] The electronic water pump knocking compensation function starting judgment module 501 comprises:

[0117] An engine current operating condition region judgment unit 5011 is configured to judge whether the engine current operating condition is in a preset engine knocking operating condition region.

[0118] An engine knocking judgment unit 5012 is configured to judge whether the engine knocks based on the knocking diagnosis flag of each cylinder of the engine if the engine current operating condition is in the preset engine knocking operating condition region.

[0119] An electronic water pump knocking compensation function starting judgment unit 5013 is configured to judge whether to start the electronic water pump knocking compensation function based on the average value of the knockback spark angle of each cylinder caused by knocking if the engine knocks.

[0120] The electronic water pump operating parameter value determination module 502 comprises:

[0121] A historical parameter compensation value determination unit 5021 is configured to obtain a historical parameter compensation value of the operating parameter of the electronic water pump at the last start-up;

[0122] A self-learning parameter offset value determination unit 5022 is configured to determine a self-learning parameter offset value corresponding to the operating parameter of the electronic water pump at present;

[0123] A parameter initial value determination unit 5023 is configured to determine a parameter initial value of the operating parameter of the electronic water pump under the current engine operating condition;

[0124] An initial parameter compensation value determination unit 5024 is configured to add the historical parameter compensation value of the operating parameter of the electronic water pump at the last start-up and the self-learning parameter offset value corresponding to the operating parameter of the electronic water pump at present, to obtain an initial parameter compensation value corresponding to the operating parameter of the electronic water pump;

[0125] A parameter margin value determination unit 5025 is configured to determine a parameter margin value corresponding to the operating parameter of the electronic water pump under the current engine operating condition;

[0126] A parameter compensation value determination unit 5026 is configured to determine a parameter compensation value of the operating parameter of the electronic water pump under the current engine operating condition based on the initial parameter compensation value and the parameter margin value corresponding to the operating parameter of the electronic water pump;

[0127] The parameter margin value corresponding to the operating parameter of the electronic water pump = the maximum value of the operating parameter of the electronic water pump - the parameter initial value of the operating parameter of the electronic water pump under the current engine operating condition.

[0128] The electronic water pump control module 503 is specifically configured to control the operating parameter of the electronic water pump to start according to the sum of the parameter compensation value and the parameter initial value.

[0129] The above modules and units perform the real-time mode in the above method when performing specific steps.

[0130] The above device has the same effect as the above method, that is, the above method uses the capacity margin of the electronic water pump to increase the cooling intensity under the knocking condition, so as to reduce the knocking trend and improve the engine combustion efficiency and engine power.

[0131] Referring to Figure 6 , the embodiment further provides an electronic water pump compensation control system during engine knocking, comprising: an electronic water pump control unit 603, an electronic water pump 601 connected with the electronic water pump control unit 603, and an engine control unit 602.

[0132] The electronic water pump control unit 603 determines whether to start the electronic water pump knock compensation function due to the occurrence of engine knock according to the current engine operating condition provided by the engine control unit 602;

[0133] If the electronic water pump knock compensation function is started due to the occurrence of engine knock, the operating parameters of the electronic water pump are determined to be the parameter initial value and the parameter compensation value under the current engine operating condition;

[0134] The operating parameters of the electronic water pump 601 are started according to the sum of the parameter compensation value and the parameter initial value.

[0135] The electronic water pump control unit 603 described above can be a separate controller, or a controller that has logic to command the electronic water pump. The electronic water pump control unit 603 described above performs the electronic water pump compensation control method when the engine knocks.

[0136] The embodiment of the present application also provides a vehicle comprising the electronic water pump compensation control device when the engine knocks.

[0137] The embodiment of the present application also provides a control device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implements the steps of the electronic water pump compensation control method when the engine knocks.

[0138] The embodiment of the present application also provides a readable storage medium, which stores a program or instructions, which when executed by a processor implements the steps of the electronic water pump compensation control method when the engine knocks.

[0139] The above is the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, can make several improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A method for compensating for engine knocking with an electronic water pump, characterized in that, include: Under the current engine operating conditions, the electronic water pump knock compensation function is activated based on the average retardation angle of each cylinder caused by knocking. If the electronic water pump knock compensation function is activated due to engine knock, determine the initial and compensation values ​​of the electronic water pump's operating parameters under the current engine operating conditions. The operating parameters of the electronic water pump are controlled to start based on the parameter compensation value and the parameter initial value; The steps for determining the parameter compensation values ​​of the electric water pump under the current engine operating conditions include: Obtain the historical parameter compensation values ​​of the electronic water pump's operating parameters at the time of the last startup; Determine the offset value of the self-learning parameters corresponding to the current operating parameters of the electronic water pump; The initial parameter compensation value corresponding to the operating parameters of the electronic water pump is obtained by adding the historical parameter compensation value of the operating parameters at the last start and the corresponding self-learning parameter offset value. Based on the initial values ​​of the operating parameters of the electronic water pump under the current engine operating conditions, determine the parameter margin values ​​corresponding to the operating parameters of the electronic water pump under the current engine operating conditions. Based on the initial parameter compensation value and parameter margin value corresponding to the operating parameters of the electronic water pump, determine the parameter compensation value of the operating parameters of the electronic water pump under the current engine operating conditions. The parameter margin value corresponding to the operating parameters of the electric water pump = the maximum value of the operating parameters of the electric water pump - the initial value of the operating parameters of the electric water pump under the current engine operating conditions.

2. The electronic water pump compensation control method for engine knocking according to claim 1, characterized in that, The self-learning parameter offset value corresponding to the current operating parameters of the electronic water pump is n% of the current operating parameters of the electronic water pump; n is obtained by calibration based on the engine speed and engine load under the current engine operating conditions.

3. The electronic water pump compensation control method for engine knocking according to claim 1 or 2, characterized in that, The steps for determining the parameter compensation values ​​of the electronic water pump under the current engine operating conditions, based on the initial parameter compensation values ​​and parameter margin values ​​corresponding to the operating parameters of the electronic water pump, include: By reducing the initial parameter compensation value and parameter margin value corresponding to the operating parameters of the electric water pump, the parameter compensation value of the electric water pump under the current engine operating conditions is obtained.

4. The electronic water pump compensation control method for engine knocking according to claim 1, characterized in that, The steps to determine whether the electronic water pump knock compensation function should be activated due to engine knock include: Determine whether the engine is currently operating in the preset engine knock condition zone; If the engine is currently operating in the preset engine knock condition zone, determine whether engine knock has occurred based on the knock diagnosis flags of each cylinder. If engine knocking occurs, the system determines whether to activate the electronic water pump knock compensation function based on the average retardation angle of each cylinder caused by knocking.

5. The electronic water pump compensation control method for engine knocking according to claim 4, characterized in that, If at least one cylinder has a knock diagnostic flag set, engine knocking is confirmed.

6. The electronic water pump compensation control method for engine knocking according to claim 4 or 5, characterized in that, If the average annealing angle of each cylinder caused by knocking is greater than or equal to the preset average annealing angle, the electronic water pump knocking compensation function will be activated. If the average retardation angle of each cylinder due to knocking is less than the preset average retardation angle, the electronic water pump knocking compensation function will not be activated.

7. The electronic water pump compensation control method for engine knocking according to claim 1, characterized in that, The operating parameters of an electronic water pump are its speed or flow rate.

8. The electronic water pump compensation control method for engine knocking according to claim 1, characterized in that, The specific steps for controlling the operation parameters of the electronic water pump to start based on the parameter compensation value and the parameter initial value are as follows: The operating parameters of the electronic water pump are controlled to start according to the sum of the parameter compensation value and the parameter initial value.

9. An electronic water pump compensation control device for engine knocking, characterized in that, include: The electronic water pump knock compensation function activation judgment module is used to determine whether the electronic water pump knock compensation function should be activated due to engine knock under the current engine operating conditions, based on the average value of the retardation angle caused by knock in each cylinder. The electronic water pump operating parameter value determination module is used to determine the initial and compensation values ​​of the electronic water pump operating parameters under the current engine operating conditions if the electronic water pump knock compensation function is activated due to engine knock. An electronic water pump control module is used to control the operation parameters of the electronic water pump to start based on the parameter compensation value and the parameter initial value; The electronic water pump operating parameter value determination module includes: The historical parameter compensation value determination unit is used to obtain the historical parameter compensation values ​​of the operating parameters of the electronic water pump at the time of the last startup. The self-learning parameter offset value determination unit is used to determine the self-learning parameter offset value corresponding to the current operating parameters of the electronic water pump. The parameter initial value determination unit is used to determine the initial values ​​of the operating parameters of the electric water pump under the current engine operating conditions. The initial parameter compensation value determination unit is used to add the historical parameter compensation value of the operating parameters of the electronic water pump at the last start-up and the corresponding self-learning parameter offset value to obtain the initial parameter compensation value corresponding to the operating parameters of the electronic water pump. The parameter margin value determination unit is used to determine the parameter margin value corresponding to the operating parameters of the electronic water pump under the current engine operating conditions based on the initial values ​​of the operating parameters of the electronic water pump under the current engine operating conditions. The parameter compensation value determination unit is used to determine the parameter compensation value of the electric water pump under the current engine operating conditions based on the initial parameter compensation value and parameter margin value corresponding to the operating parameters of the electric water pump. The parameter margin value corresponding to the operating parameters of the electric water pump = the maximum value of the operating parameters of the electric water pump - the initial value of the operating parameters of the electric water pump under the current engine operating conditions.

10. The electronic water pump compensation control device for engine knocking according to claim 9, characterized in that, The electronic water pump knock compensation function activation judgment module includes: The engine current operating condition zone determination unit is used to determine whether the engine is currently operating in a preset engine knock condition zone. The engine knock detection unit is used to determine whether engine knock has occurred if the current engine operating condition is in a preset engine knock condition area, based on the knock diagnosis flags of each cylinder of the engine. The electronic water pump knock compensation function activation judgment unit is used to determine whether to activate the electronic water pump knock compensation function based on the average value of the retardation angle of each cylinder caused by the knock if engine knock occurs.

11. An electronic water pump compensation control system for engine knocking, characterized in that, include: Electronic water pump control unit, electronic water pump and engine control unit connected to the electronic water pump control unit; The electronic water pump control unit determines whether to activate the electronic water pump knock compensation function based on the current engine operating conditions provided by the engine control unit and the average ignition angle of each cylinder caused by knocking. If the electronic water pump knock compensation function is activated due to engine knock, determine the initial and compensation values ​​of the electronic water pump's operating parameters under the current engine operating conditions. The steps for determining the parameter compensation values ​​of the electric water pump under the current engine operating conditions include: Obtain the historical parameter compensation values ​​of the electronic water pump's operating parameters at the time of the last startup; Determine the offset value of the self-learning parameters corresponding to the current operating parameters of the electronic water pump; The initial parameter compensation value corresponding to the operating parameters of the electronic water pump is obtained by adding the historical parameter compensation value of the operating parameters at the last start and the corresponding self-learning parameter offset value. Based on the initial values ​​of the operating parameters of the electronic water pump under the current engine operating conditions, determine the parameter margin values ​​corresponding to the operating parameters of the electronic water pump under the current engine operating conditions. Based on the initial parameter compensation value and parameter margin value corresponding to the operating parameters of the electronic water pump, determine the parameter compensation value of the operating parameters of the electronic water pump under the current engine operating conditions. The parameter margin value corresponding to the operating parameters of the electric water pump = the maximum value of the operating parameters of the electric water pump - the initial value of the operating parameters of the electric water pump under the current engine operating conditions; The operating parameters of the electronic water pump are controlled to start based on the parameter compensation value and the parameter initial value.

12. A vehicle, characterized in that, Includes the electronic water pump compensation control device for engine knocking as described in any one of claims 9 to 10.

13. A control device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the electronic water pump compensation control method for engine knock as described in any one of claims 1 to 8.

14. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the electronic water pump compensation control method for engine knock as described in claims 1 to 8.

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