Engine control method and device, vehicle and storage medium

Abstract

The embodiment of the invention provides an engine control method and device, a vehicle and a storage medium, and the method comprises the steps that the running state of the vehicle is monitored, a state monitoring result is obtained, and the state monitoring result is used for representing whether the knocking phenomenon occurs in the current running state of the vehicle or not; in response to the state monitoring result that the knocking phenomenon occurs in the current running state of the vehicle, the fuel quality of fuel currently used by the vehicle, the current running parameters and running state parameters of an engine and a first control parameter are obtained, the fuel quality is used for reflecting the combustion capacity of the fuel in multiple dimensions, and the fuel quality is used for reflecting the combustion capacity of the fuel in multiple dimensions; the running state parameters are used for reflecting running conditions of the engine; adjusting a first control parameter currently used by the engine based on the fuel oil quality and the operation parameter operation state parameter to obtain a target control parameter; and controlling the engine to operate based on the target control parameter. The technical problem that in the related technology, the stability of controlling operation of the engine is poor is solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of engine control, and in particular, to an engine control method and device, a vehicle and a storage medium. BACKGROUND

[0002] Since the fuel quality of the fuel provided by different regions can be different, the fuel quality of the fuel used by the vehicle in different regions can change accordingly. When burning, the fuel with lower fuel quality, such as fuel with lower octane rating, can cause unstable combustion, resulting in poor knock resistance of the fuel, which can affect the stability of the engine operation.

[0003] At present, there is no good solution to the above problem. SUMMARY

[0004] Embodiments of the present application provide an engine control method, device, vehicle and storage medium to at least solve the technical problem of poor control of engine operation stability in related technologies.

[0005] According to an aspect of an embodiment of the present application, an engine control method is provided, comprising: monitoring the running state of the vehicle to obtain a state monitoring result, wherein the state monitoring result is used to represent whether the current running state of the vehicle appears knock phenomenon; in response to the state monitoring result being that the current running state of the vehicle appears knock phenomenon, obtaining the fuel quality of the fuel currently used by the vehicle and the current running state parameter of the engine, wherein the fuel quality is used to reflect the combustion ability of the fuel in multiple dimensions, and the running state parameter is used to reflect the running condition of the engine; based on the fuel quality and the running state parameter, adjusting the first control parameter currently used by the engine to obtain a target control parameter; and controlling the engine to operate based on the target control parameter.

[0006] Further, obtaining the fuel quality of the fuel currently used by the vehicle comprises: obtaining a combustion state parameter generated by the engine when running, wherein the combustion state parameter is used to reflect the combustion condition inside the engine; performing feature extraction on the combustion state parameter to obtain a parameter feature of the combustion state parameter; inputting the parameter feature into a quality evaluation model to evaluate the fuel by using the quality evaluation model to obtain the fuel quality.

[0007] Further, the combustion state parameter comprises at least one of knock parameter, combustion pressure and exhaust temperature, and the parameter feature comprises at least one of knock intensity and knock frequency corresponding to the knock parameter, pressure rise rate corresponding to the combustion pressure, and temperature variation curve corresponding to the exhaust temperature; the feature extraction is performed on the combustion state parameter to obtain the parameter feature of the combustion state parameter, which comprises at least one of the following: the frequency spectrum analysis is performed on the knock parameter to obtain the knock intensity and the knock frequency; the statistical analysis is performed on the combustion pressure to obtain the pressure rise rate; and the data fitting is performed on the exhaust temperature to obtain the temperature variation curve.

[0008] Further, the first control parameter is adjusted based on the fuel quality and the operation state parameter to obtain the target control parameter, comprising: selecting the to-be-adjusted control parameter from the first control parameter based on the fuel quality, wherein the to-be-adjusted control parameter is used to represent the control parameter that needs to be adjusted at present; and adjusting the to-be-adjusted control parameter based on the operation state parameter to obtain the target control parameter.

[0009] Further, the operation state parameter comprises at least one of knock level of the engine when the knock phenomenon occurs, fuel type of the fuel, and operation condition of the engine, and the to-be-adjusted control parameter comprises at least one of initial ignition advance angle of the engine, initial injection parameter and initial supercharging pressure; the target control parameter is obtained by adjusting the to-be-adjusted control parameter based on the operation state parameter, comprising: adjusting the initial ignition advance angle based on the knock level to obtain the target ignition advance angle; adjusting the initial injection parameter based on the knock level and the fuel type to obtain the target injection parameter; adjusting the initial supercharging pressure based on the operation condition to obtain the target supercharging pressure; and obtaining the target control parameter based on the target ignition advance angle, the target injection parameter and the target supercharging pressure.

[0010] Further, the above method further comprises: obtaining the knock amplitude corresponding to the knock phenomenon that occurs, and baseline amplitude corresponding to the vehicle, wherein the baseline amplitude is used to represent the signal amplitude corresponding to the signal output by the knock sensor when the vehicle does not have the knock phenomenon; obtaining the knock intensity of the knock phenomenon based on the quotient of the knock amplitude and the baseline amplitude; and determining the knock level based on the knock intensity.

[0011] Further, the initial injection parameter comprises at least one of an initial injection time, an initial injection frequency, an initial injection quantity and an initial intake valve closing time; the initial injection parameter is adjusted based on the knock level and the fuel type to obtain a target injection parameter, comprising: determining, based on the knock level, a time advance amount corresponding to the initial injection time, a frequency change amount of the initial injection frequency and a time delay amount of the initial intake valve closing time; determining, based on the fuel type, an adjustment value of the initial injection quantity; adjusting the initial injection time based on the time advance amount to obtain a target injection time, adjusting the initial injection frequency based on the frequency change amount to obtain a target injection frequency, adjusting the initial intake valve closing time based on the time delay amount to obtain a target intake valve closing time, and adjusting the initial injection quantity based on the adjustment value to obtain a target injection quantity; and obtaining the target injection parameter based on the target injection time, the target injection frequency, the target intake valve closing time and the target injection quantity.

[0012] According to another aspect of the embodiments of the present application, an engine control device is also provided, comprising: a state monitoring module configured to monitor a running state of a vehicle to obtain a state monitoring result, wherein the state monitoring result is used to represent whether a knock phenomenon occurs in the current running state of the vehicle; a parameter acquisition module configured to, in response to the state monitoring result indicating that the knock phenomenon occurs in the current running state of the vehicle, acquire a fuel quality of a fuel currently used by the vehicle and an engine current running state parameter and a first control parameter, wherein the fuel quality is used to reflect a combustion capability of the fuel in multiple dimensions; a parameter adjustment module configured to adjust the first control parameter based on the fuel quality and the running state parameter to obtain a target control parameter; and an engine control module configured to control the engine to run based on the target control parameter.

[0013] Further, the parameter acquisition module is further configured to: acquire a combustion state parameter generated by the engine when running, wherein the combustion state parameter is used to reflect a combustion condition inside the engine; perform feature extraction on the combustion state parameter to obtain a parameter feature of the combustion state parameter; and input the parameter feature into a quality evaluation model to evaluate the fuel by using the quality evaluation model to obtain the fuel quality.

[0014] Further, the combustion state parameter comprises at least one of a knock parameter, a combustion pressure and an exhaust temperature, and the parameter feature comprises at least one of a knock intensity and a knock frequency corresponding to the knock parameter, a pressure rise rate corresponding to the combustion pressure, and a temperature change curve corresponding to the exhaust temperature; and the parameter acquisition module is further configured to: perform spectrum analysis on the knock parameter to obtain the knock intensity and the knock frequency; perform statistical analysis on the combustion pressure to obtain the pressure rise rate; and perform data fitting on the exhaust temperature to obtain the temperature change curve.

[0015] Further, the parameter obtaining module is further configured to: select a to-be-adjusted control parameter from the first control parameter based on the fuel quality, wherein the to-be-adjusted control parameter is used to represent a control parameter that needs to be adjusted currently; and adjust the to-be-adjusted control parameter based on the operating state parameter to obtain the target control parameter.

[0016] Further, the operating state parameter comprises at least one of a knock level of the engine when the knock phenomenon occurs, a fuel type of the fuel, and an operating condition of the engine, and the to-be-adjusted control parameter comprises at least one of an initial ignition advance angle of the engine, an initial injection parameter, and an initial supercharging pressure; and the parameter obtaining module is further configured to: adjust the initial ignition advance angle based on the knock level to obtain a target ignition advance angle; adjust the initial injection parameter based on the knock level and the fuel type to obtain a target injection parameter; and adjust the initial supercharging pressure based on the operating condition to obtain a target supercharging pressure; and obtain the target control parameter based on the target ignition advance angle, the target injection parameter, and the target supercharging pressure.

[0017] Further, the device further comprises: an amplitude obtaining module configured to obtain a knock amplitude corresponding to the knock phenomenon that occurs and a baseline amplitude corresponding to the vehicle, wherein the baseline amplitude is used to represent a signal amplitude corresponding to a signal output by the knock sensor when the vehicle does not have the knock phenomenon; an intensity determining module configured to obtain a knock intensity of the knock phenomenon based on a quotient of the knock amplitude and the baseline amplitude; and a level determining module configured to determine the knock level based on the knock intensity.

[0018] Further, the initial injection parameter comprises at least one of an initial injection time, an initial injection frequency, an initial injection amount, and an initial intake valve closing time; and the parameter obtaining module is further configured to: determine a time advance amount corresponding to the initial injection time, a frequency change amount of the initial injection frequency, and a time delay amount of the initial intake valve closing time based on the knock level; determine an adjustment value of the initial injection amount based on the fuel type; adjust the initial injection time based on the time advance amount to obtain a target injection time, adjust the initial injection frequency based on the frequency change amount to obtain a target injection frequency, adjust the initial intake valve closing time based on the time delay amount to obtain a target intake valve closing time, and adjust the initial injection amount based on the adjustment value to obtain a target injection amount; and obtain the target injection parameter based on the target injection time, the target injection frequency, the target intake valve closing time, and the target injection amount.

[0019] According to another aspect of the embodiments of the present application, a vehicle is further provided, comprising: a memory storing an executable program; and a processor configured to run the program, wherein the program is configured to execute the method in the embodiments of the present application when running.

[0020] According to another aspect of the embodiments of the present application, a computer readable storage medium is also provided, including a stored executable program, wherein the executable program controls the device where the computer readable storage medium is located to perform the method in various embodiments of the present application when the executable program is running.

[0021] According to another aspect of the embodiments of the present application, a computer program product is also provided, including a computer program, which implements the method in various embodiments of the present application when executed by a processor.

[0022] According to another aspect of the embodiments of the present application, a computer program product is also provided, including a non-volatile computer readable storage medium, which stores a computer program, which implements the method in various embodiments of the present application when executed by a processor.

[0023] According to another aspect of the embodiments of the present application, a computer program is also provided, which implements the method in various embodiments of the present application when executed by a processor.

[0024] In the embodiments of the present application, the running state of the vehicle is monitored to obtain a state monitoring result; in response to the state monitoring result indicating that the current running state of the vehicle has knock phenomenon, the fuel quality of the fuel currently used by the vehicle and the current running state parameter of the engine are obtained; the first control parameter currently used by the engine is adjusted based on the fuel quality and the running state parameter to obtain a target control parameter; and the engine is controlled to run based on the target control parameter. By adjusting the first control parameter currently used by the engine according to the fuel quality of the fuel currently used by the engine and the running state parameter reflecting the current running state of the engine in the case that the vehicle has knock, the rationality of the obtained target control parameter and the matching degree of the target control parameter and the current driving condition of the vehicle can be ensured, so that the engine can stably run after the engine is controlled to run based on the target control parameter, thereby solving the technical problem of poor stability of the engine in the related art. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the present application, constitute a part of the present application and illustrate the exemplary embodiments of the present application and a description thereof serve to explain the present application, but do not limit the present application. In the drawings:

[0026] Figure 1 is a flowchart of an engine control method according to an embodiment of the present application;

[0027] Figure 2 is a structural block diagram of an engine control device according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0029] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described accompanying drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] According to the embodiments of the present application, a method embodiment of engine control is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0031] In the present embodiment, a method of engine control is provided, Figure 1 is a flowchart of a method of engine control according to the embodiments of the present application, as Figure 1 shown, the flow includes the following steps:

[0032] Step S102, monitoring the running state of the vehicle to obtain a state monitoring result.

[0033] The state monitoring result is used to represent whether the current running state of the vehicle appears knock phenomenon.

[0034] In an optional solution of the embodiment, in view of the stability of the vehicle during driving, which is generally related to the combustion ability of the fuel, for example, whether the fuel has a higher octane rating, which determines whether the fuel has stronger knock resistance and can stably combust under high compression ratio or high speed conditions without causing knock, and whether the combustion efficiency and combustion temperature of the fuel are high or low, which can determine whether the engine can run smoothly. Therefore, in order to accurately adjust the control parameters of the engine in the case of knock of the vehicle, so as to control the stable and low operation of the engine, the control system can adaptively adjust the control parameters of the engine on the basis of the combustion ability of the fuel currently used by the engine.

[0035] Therefore, in order to avoid blindly adjusting the control parameters of the engine, which may affect the driving performance of the vehicle or increase the consumption of the fuel, the control system can monitor the running state of the engine in real time to obtain a state monitoring result, so as to determine whether the current running state of the vehicle has the above-mentioned knock phenomenon through the state monitoring result.

[0036] Step S104, in response to the state monitoring result that the current running state of the vehicle has the knock phenomenon, obtaining the fuel quality of the fuel currently used by the vehicle and the current running state parameter of the engine.

[0037] The fuel quality is used to reflect the combustion ability of the fuel in multiple dimensions, and the running state parameter is used to reflect the running condition of the engine.

[0038] The multiple dimensions can be dimensions that can reflect the combustion characteristics and combustion ability of the fuel, and can include but are not limited to: knock resistance, combustion efficiency, cleaning ability, thermal stability and oxidation resistance, etc. Correspondingly, the fuel quality can be reflected in the octane rating of the fuel, and the higher the octane rating of the fuel, the higher the fuel quality of the fuel. The running state parameter can be a parameter that can reflect the running condition of the engine, and can include but is not limited to: the speed, load, air-fuel ratio, cylinder pressure, etc. of the engine.

[0039] In an optional solution of the embodiment, in the case that the state monitoring result shows that the current state of the vehicle appears knock phenomenon, it indicates that the fuel quality of the currently used fuel can not meet the operation requirements of the engine. At this time, the control system can acquire the fuel quality of the currently used fuel of the vehicle, so as to understand the characteristics of the fuel in the dimensions of knock ability, combustion efficiency, cleaning ability and the like, so as to take appropriate control strategy to adjust the combustion process of the fuel. Considering that the operation requirements of the engine under different working conditions can be different, and the combustion process of the fuel corresponding to different operation requirements can also be different, which leads to that the control parameters of the engine are also affected by the operation state parameters of the engine. Therefore, while acquiring the fuel quality of the fuel, the control system can acquire the current operation state parameters of the engine, so as to dynamically and reasonably adjust the currently used control parameters of the engine by using the operation state parameters.

[0040] In step S106, the first control parameter currently used by the engine is adjusted based on the fuel quality and the operation state parameters, to obtain a target control parameter.

[0041] In an optional solution of the embodiment, after the fuel quality and the operation state parameters are acquired, the control system can adjust the control parameter currently used by the engine, that is, the above-mentioned first control parameter, by using the fuel quality and the operation state parameters, to obtain the above-mentioned target control parameter.

[0042] For example, if the control system detects that the fuel quality of the fuel currently used by the engine is low, for example, low octane number fuel is used, and the engine is currently operated under high speed and high load working condition, the control system can select to adjust the ignition advance angle of the engine, for example, reduce the ignition advance angle, to avoid the occurrence of knock. In order to compensate for the reduction of the ignition advance angle, the control system can also adjust the fuel injection amount of the engine, slightly enrich the mixture, so as to ensure that the combustion efficiency is not affected too much.

[0043] In step S108, the engine is controlled to operate based on the target control parameter.

[0044] In an optional solution of the embodiment, after the target control parameter is obtained, the control system can control the engine to operate by using the target control parameter, so as to ensure that the engine can operate smoothly, efficiently and safely under different fuel qualities and operation parameters.

[0045] In the embodiment of the present application, the running state of the vehicle is monitored to obtain a state monitoring result; in response to the state monitoring result indicating that the current running state of the vehicle has knock phenomenon, the fuel quality of the fuel currently used by the vehicle and the current running state parameter of the engine are obtained; the first control parameter currently used by the engine is adjusted based on the fuel quality and the running state parameter to obtain a target control parameter; and the engine is controlled to operate in a manner based on the target control parameter. By adjusting the first control parameter currently used by the engine according to the fuel quality of the fuel currently used by the engine and the running state parameter reflecting the current running state of the engine in the case where the vehicle has knock, the rationality of the obtained target control parameter and the matching degree of the target control parameter with the current driving condition of the vehicle can be ensured, so that the engine can stably operate after the engine is controlled to operate by using the target control parameter, thereby solving the technical problem of poor stability of the engine in the related art.

[0046] Further, the fuel quality of the fuel currently used by the vehicle is obtained by: obtaining a combustion state parameter generated by the engine during operation, wherein the combustion state parameter is used to reflect the combustion condition inside the engine; performing feature extraction on the combustion state parameter to obtain a parameter feature of the combustion state parameter; and inputting the parameter feature into a quality evaluation model to evaluate the fuel by using the quality evaluation model to obtain the fuel quality.

[0047] In an optional solution of the embodiment, in order to improve the accuracy of the obtained fuel quality, the control system can first obtain a combustion state parameter generated by the engine during operation to determine the combustion condition inside the engine by using the combustion state parameter, then perform feature extraction on the combustion state parameter to obtain a parameter feature of the combustion state parameter, and finally input the parameter feature into a quality evaluation model to evaluate the fuel by using the quality evaluation model to determine the fuel quality of the fuel.

[0048] Further, the combustion state parameter includes at least one of knock parameter, combustion pressure, and exhaust temperature, and the parameter feature includes at least one of knock intensity and knock frequency corresponding to the knock parameter, pressure rise rate corresponding to the combustion pressure, and temperature change curve corresponding to the exhaust temperature; the feature extraction on the combustion state parameter to obtain the parameter feature of the combustion state parameter includes at least one of: performing frequency spectrum analysis on the knock parameter to obtain the knock intensity and the knock frequency; performing statistical analysis on the combustion pressure to obtain the pressure rise rate; and performing data fitting on the exhaust temperature to obtain the temperature change curve.

[0049] In an alternative of the embodiment, in order to more accurately identify and evaluate the combustion quality and stability inside the engine, the combustion state parameters acquired by the control system can include at least one of knock parameters, combustion pressure and exhaust temperature, wherein the knock parameters can be the vibration frequency and amplitude sensed by the knock sensor, the combustion pressure can be the maximum peak pressure generated by the in-cylinder combustion process of the engine sensed by the cylinder pressure sensor, and the exhaust temperature can be the temperature value of the exhaust gas when it is discharged from the engine sensed by the intake pressure / temperature sensor. Corresponding to the combustion state parameters, the parameter features extracted from the combustion state parameters can include knock intensity and knock frequency corresponding to the knock parameters, pressure rise rate corresponding to the combustion pressure, and temperature variation curve corresponding to the exhaust temperature. In addition, other sensors can be arranged on the vehicle to adaptively acquire the engine parameters needed to be sensed in the process of controlling the engine, for example, an oxygen sensor can also be arranged to monitor the air-fuel ratio of the engine to determine the combustion stability, and a crankshaft position sensor can also be arranged to provide the engine speed and crankshaft phase information.

[0050] In the process of feature extraction of the combustion state parameters, the control system can perform frequency spectrum analysis on the knock parameters to obtain the above-mentioned knock intensity and knock frequency, perform statistical analysis on the combustion pressure to obtain the above-mentioned pressure rise rate, and perform data fitting on the exhaust temperature to obtain the above-mentioned temperature variation curve.

[0051] Correspondingly, through the knock intensity and knock frequency, the control system can identify the severity of the knock phenomenon experienced by the engine to determine whether to suppress the knock by adjusting the ignition timing. Through the pressure rise rate, the control system can determine the combustion efficiency and stability of the combustion process of the engine to determine whether to adjust the fuel injection amount and injection timing of the engine to improve the combustion efficiency of the engine. Through the temperature variation curve, the control system can monitor the thermal management state of the combustion chamber to determine whether to adjust the air-fuel ratio or enable the cooling system to prevent the engine from overheating and protect the engine components.

[0052] Further, the target control parameter is obtained by adjusting the first control parameter based on the fuel quality and the operating state parameter, including: selecting a to-be-adjusted control parameter from the first control parameter based on the fuel quality, wherein the to-be-adjusted control parameter is used to represent the control parameter that needs to be adjusted at present; and adjusting the to-be-adjusted control parameter based on the operating state parameter to obtain the target control parameter.

[0053] In an alternative of the embodiment, in the process of adjusting the first control parameter by using the fuel quality and the operating state parameter, it is considered that the combustion ability of the fuel of different quality is different, and the corresponding appropriate parameter adjustment strategy is also different. For example, for the octane fuel, the relatively aggressive ignition advance angle and the relatively high compression ratio can be used to fully utilize the energy of the fuel and improve the power output and the combustion efficiency of the engine; and for the low octane fuel, the conservative ignition advance angle and the relatively low compression ratio can be used to prevent the knocking phenomenon of the vehicle under the high compression ratio or the high speed, which affects the performance of the engine. Therefore, in order to improve the rationality of the target control parameter obtained by the adjustment, the control system can first select the control parameter currently required to be adjusted, i.e. the above-mentioned to-be-adjusted control parameter, from the first control parameter according to the fuel quality, and then adjust the to-be-adjusted control parameter by using the operating state parameter, so as to obtain the above-mentioned target control parameter.

[0054] For example, for the low octane fuel, the control system can select the ignition advance angle, the fuel injection amount and the supercharging pressure of the engine as the above-mentioned to-be-adjusted control parameter; and for the high octane fuel or the ethanol mixed fuel, the control system can select the fuel injection amount and the ignition advance angle as the above-mentioned to-be-adjusted control parameter.

[0055] Further, the operating state parameter includes at least one of the knocking level of the engine when the knocking phenomenon occurs, the fuel type of the fuel, and the operating condition of the engine, and the to-be-adjusted control parameter includes at least one of the initial ignition advance angle, the initial fuel injection parameter and the initial supercharging pressure of the engine; the adjustment of the to-be-adjusted control parameter based on the operating state parameter to obtain the target control parameter includes: adjusting the initial ignition advance angle based on the knocking level to obtain the target ignition advance angle; adjusting the initial fuel injection parameter based on the knocking level and the fuel type to obtain the target fuel injection parameter; adjusting the initial supercharging pressure based on the operating condition to obtain the target supercharging pressure; and obtaining the target control parameter based on the target ignition advance angle, the target fuel injection parameter and the target supercharging pressure.

[0056] In an alternative of the embodiment, in order to improve the rationality of the adjustment of the to-be-adjusted control parameter, the operating state parameter can include at least one of the knocking level of the engine when the knocking phenomenon occurs, the fuel type of the fuel, and the operating condition of the engine. The corresponding to-be-adjusted control parameter can include at least one of the initial ignition advance angle, the initial fuel injection parameter and the initial supercharging pressure of the engine.

[0057] In the process of adjusting the to-be-adjusted parameter, the control system can adjust the initial ignition advance angle according to the knock level to obtain a target ignition advance angle, adjust the initial fuel injection parameter according to the knock level and the fuel type to obtain a target fuel injection parameter, and adjust the initial supercharging pressure according to the operating condition to obtain a target supercharging pressure. Finally, the target control parameter described above can be obtained according to the target ignition advance angle, the target fuel injection parameter and the target supercharging pressure.

[0058] Further, the method further includes: obtaining a knock amplitude corresponding to the knock phenomenon, and a baseline amplitude corresponding to the vehicle, wherein the baseline amplitude is used to represent a signal amplitude corresponding to a signal output by the knock sensor when the vehicle does not have the knock phenomenon; obtaining a knock intensity of the knock phenomenon based on a quotient of the knock amplitude and the baseline amplitude; and determining the knock level based on the knock intensity.

[0059] In an optional solution of the embodiment, in order to improve the accuracy of adjusting the initial ignition advance angle, the control system can obtain a knock amplitude corresponding to the knock phenomenon, and a baseline amplitude corresponding to a signal output by the knock sensor when the vehicle does not have the knock phenomenon. Then, the control system can determine a knock intensity of the knock phenomenon according to a quotient of the knock amplitude and the baseline amplitude, and determine a knock level of the current knock phenomenon according to the knock intensity.

[0060] For example, it is assumed that the control system receives a signal from the knock sensor, which shows that a knock phenomenon occurs under a certain condition. At this time, the control system first records a knock amplitude of 600 mV, and a baseline amplitude of 200 mV when the vehicle does not have the knock phenomenon under the same condition. Then, the calculated knock intensity KI is:

[0061] KI = 600 mV / 200 mV = 3.0.

[0062] Since the knock intensity is much higher than a preset heavy knock threshold, for example, 1.5, the control system determines that the knock is a heavy knock at this time. In this case, the control system can greatly delay the ignition advance angle, for example, by 5°-10°, and can take additional measures, such as enriching the mixture or adjusting the valve timing, to quickly reduce the knock tendency and ensure the safety and performance of the engine. In addition, the control system can determine that a knock intensity of 0-1.5 guarantees a light knock, and a knock intensity of 0-1.5 guarantees a moderate knock. It should be noted that the above is only an exemplary display, and the knock levels are not limited in specific settings.

[0063] Further, the initial injection parameter includes at least one of an initial injection time, an initial injection frequency, an initial injection amount and an initial intake valve closing time; the initial injection parameter is adjusted based on the knock level and the fuel type to obtain a target injection parameter, including: based on the knock level, determining a time advance amount corresponding to the initial injection time, a frequency change amount of the initial injection frequency, and a time delay amount of the initial intake valve closing time; based on the fuel type, determining an adjustment value of the initial injection amount; based on the time advance amount, adjusting the initial injection time to obtain a target injection time, and based on the frequency change amount, adjusting the initial injection frequency to obtain a target injection frequency, and based on the time delay amount, adjusting the initial intake valve closing time to obtain a target intake valve closing time, and based on the adjustment value, adjusting the initial injection amount to obtain a target injection amount; and based on the target injection time, the target injection frequency, the target intake valve closing time and the target injection amount, obtaining the target injection parameter.

[0064] In an optional solution of the embodiment, the injection parameter can include at least one of the initial injection time, the initial injection frequency, the initial injection amount and the initial intake valve closing time. Correspondingly, in the process of adjusting the injection parameter, the control system can first determine, by table lookup, a time advance amount corresponding to the initial injection time, a frequency change amount of the initial injection frequency, and a time delay amount of the initial intake valve closing time according to the knock level of the currently occurring knock phenomenon, and determine an adjustment value of the initial injection amount according to the fuel type of the fuel. Then, the control system can adjust the initial injection time by using the time advance amount to obtain a target injection time, adjust the initial injection frequency by using the frequency change amount to obtain a target injection frequency, adjust the initial intake valve closing time by using the time delay amount to obtain a target intake valve closing time, and adjust the initial injection amount by using the adjustment value to obtain a target injection amount. Finally, according to the target injection time, the target injection frequency, the target intake valve closing time and the target injection amount obtained by adjustment, the target injection parameter described above can be obtained.

[0065] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation portal for user to choose authorization or refusal.

[0066] According to the embodiment of the present application, a device embodiment of engine control is provided. It should be noted that the device can be used to execute the engine control method described above. Figure 2is a structural block diagram of an engine control device according to an embodiment of the present application, as shown in the figure, the device comprises: a state monitoring module 202, a parameter acquisition module 204, a parameter adjustment module 206 and an engine control module 208. Figure 2

[0067] The state monitoring module 202 is configured to monitor the running state of the vehicle to obtain a state monitoring result, wherein the state monitoring result is used to represent whether the current running state of the vehicle appears knock phenomenon; the parameter acquisition module 204 is configured to acquire the fuel quality of the fuel currently used by the vehicle, and the current running state parameter and the first control parameter of the engine in response to the state monitoring result that the current running state of the vehicle appears knock phenomenon, wherein the fuel quality is used to reflect the combustion ability of the fuel in multiple dimensions; the parameter adjustment module 206 is configured to adjust the first control parameter based on the fuel quality and the running state parameter to obtain a target control parameter; the engine control module 208 is configured to control the engine to run based on the target control parameter.

[0068] Further, the parameter acquisition module is further configured to: acquire a combustion state parameter generated by the engine when running, wherein the combustion state parameter is used to reflect the combustion condition inside the engine; perform feature extraction on the combustion state parameter to obtain a parameter feature of the combustion state parameter; input the parameter feature into a quality evaluation model to evaluate the fuel by using the quality evaluation model to obtain the fuel quality.

[0069] Further, the combustion state parameter comprises at least one of the following: knock parameter, combustion pressure and exhaust temperature, and the parameter feature comprises at least one of the following: knock intensity and knock frequency corresponding to the knock parameter, pressure rise rate corresponding to the combustion pressure, and temperature change curve corresponding to the exhaust temperature; the parameter acquisition module is further configured to: perform frequency spectrum analysis on the knock parameter to obtain the knock intensity and the knock frequency; perform statistical analysis on the combustion pressure to obtain the pressure rise rate; perform data fitting on the exhaust temperature to obtain the temperature change curve.

[0070] Further, the parameter acquisition module is further configured to: select a to-be-adjusted control parameter from the first control parameter based on the fuel quality, wherein the to-be-adjusted control parameter is used to represent the control parameter that needs to be adjusted at present; adjust the to-be-adjusted control parameter based on the running state parameter to obtain the target control parameter.

[0071] ​Further, the running state parameter comprises at least one of knock level of the engine, fuel type of the fuel, and running condition of the engine, and the to-be-adjusted control parameter comprises at least one of initial ignition advance angle of the engine, initial fuel injection parameter, and initial supercharging pressure; the parameter acquisition module is further configured to: adjust the initial ignition advance angle based on the knock level to obtain a target ignition advance angle; adjust the initial fuel injection parameter based on the knock level and the fuel type to obtain a target fuel injection parameter; adjust the initial supercharging pressure based on the running condition to obtain a target supercharging pressure; and obtain the target control parameter based on the target ignition advance angle, the target fuel injection parameter, and the target supercharging pressure.

[0072] Further, the device further comprises: an amplitude acquisition module configured to acquire a knock amplitude corresponding to the knock phenomenon, and a baseline amplitude corresponding to the vehicle, wherein the baseline amplitude is used to represent a signal amplitude corresponding to a signal output by the knock sensor in a case where the vehicle does not have the knock phenomenon; an intensity determination module configured to obtain a knock intensity of the knock phenomenon based on a quotient of the knock amplitude and the baseline amplitude; and a level determination module configured to determine the knock level based on the knock intensity.

[0073] Further, the initial fuel injection parameter comprises at least one of an initial fuel injection time, an initial fuel injection frequency, an initial fuel injection amount, and an initial intake valve closing time; the parameter acquisition module is further configured to: determine a time advance amount corresponding to the initial fuel injection time, a frequency change amount of the initial fuel injection frequency, and a time delay amount of the initial intake valve closing time based on the knock level; determine an adjustment value of the initial fuel injection amount based on the fuel type; adjust the initial fuel injection time based on the time advance amount to obtain a target fuel injection time, adjust the initial fuel injection frequency based on the frequency change amount to obtain a target fuel injection frequency, adjust the initial intake valve closing time based on the time delay amount to obtain a target intake valve closing time, and adjust the initial fuel injection amount based on the adjustment value to obtain a target fuel injection amount; and obtain the target fuel injection parameter based on the target fuel injection time, the target fuel injection frequency, the target intake valve closing time, and the target fuel injection amount.

[0074] Embodiments of the present application also provide a vehicle, comprising: a memory storing an executable program; and a processor configured to run the program, wherein the program is configured to execute the method in the embodiments of the present application when running.

[0075] Embodiments of the present application also provide a computer-readable storage medium, comprising a stored executable program, wherein the computer-readable storage medium is configured to control a device where the computer-readable storage medium is located to execute the method in the embodiments of the present application when the executable program is running.

[0076] The embodiment of the present application further provides a computer program product comprising a computer program, which, when executed by a processor, implements the method in each embodiment of the present application.

[0077] The embodiment of the present application further provides a computer program product comprising a non-volatile computer readable storage medium, which is used to store a computer program, which, when executed by a processor, implements the method in each embodiment of the present application.

[0078] The embodiment of the present application further provides a computer program, which, when executed by a processor, implements the method in each embodiment of the present application.

[0079] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0080] In several embodiments provided in the present application, it should be understood that the disclosed technical contents can be implemented by other manners. Among them, the above-described device embodiments are only schematic, for example, the division of units can be a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or modules shown or discussed can be indirect coupling or communication connection through some interfaces, and can be electrical or other forms.

[0081] 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 can be located in one place, or can be distributed on multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0082] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0083] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0084] The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. An engine control method, characterized in that, include: The vehicle's operating status is monitored to obtain a status monitoring result, wherein the status monitoring result is used to characterize whether the vehicle's current operating status is experiencing knocking. In response to the status monitoring result indicating that the vehicle's current operating state has knocking, the fuel quality of the fuel currently used by the vehicle and the current operating status parameters of the engine are obtained, wherein the fuel quality is used to reflect the combustion capacity of the fuel in multiple dimensions, and the operating status parameters are used to reflect the operating status of the engine. Based on the fuel quality and the operating status parameters, the first control parameters currently used by the engine are adjusted to obtain the target control parameters; The engine is controlled to operate based on the target control parameters.

2. The method according to claim 1, characterized in that, Obtaining the fuel quality of the fuel currently used by the vehicle includes: The combustion state parameters generated by the engine during operation are obtained, wherein the combustion state parameters are used to reflect the combustion situation inside the engine; Feature extraction is performed on the combustion state parameters to obtain the parameter features of the combustion state parameters; The parameter features are input into the quality assessment model, and the fuel is evaluated using the quality assessment model to obtain the fuel quality.

3. The method according to claim 2, characterized in that, The combustion state parameters include at least one of the following: knock parameters, combustion pressure, and exhaust temperature; the parameter features include at least one of the following: knock intensity and knock frequency corresponding to the knock parameters, pressure rise rate corresponding to the combustion pressure, and temperature change curve corresponding to the exhaust temperature; feature extraction is performed on the combustion state parameters to obtain the parameter features of the combustion state parameters, including at least one of the following: The detonation parameters are subjected to spectral analysis to obtain the detonation intensity and the detonation frequency; The rate of pressure rise was obtained by statistical analysis of the combustion pressure. The exhaust temperature is fitted to obtain the temperature change curve.

4. The method according to claim 3, characterized in that, Based on the fuel quality and the operating status parameters, the first control parameter is adjusted to obtain the target control parameter, including: Based on the fuel quality, a control parameter to be adjusted is selected from the first control parameter, wherein the control parameter to be adjusted is used to characterize the control parameter that needs to be adjusted at present; The control parameters to be adjusted are obtained by adjusting the operating status parameters to obtain the target control parameters.

5. The method according to claim 4, characterized in that, The operating status parameters include at least one of the following: the knock level of the engine, the fuel type, and the engine operating conditions; the control parameters to be adjusted include at least one of the following: the engine's initial ignition advance angle, initial injection parameters, and initial boost pressure; the target control parameters are obtained by adjusting the control parameters to be adjusted based on the operating status parameters, including: The initial ignition advance angle is adjusted based on the knock level to obtain the target ignition advance angle; The initial injection parameters are adjusted based on the knock level and the fuel type to obtain the target injection parameters; The initial boost pressure is adjusted based on the operating conditions to obtain the target boost pressure; The target control parameters are obtained based on the target ignition advance angle, the target fuel injection parameters, and the target boost pressure.

6. The method according to claim 5, characterized in that, The method further includes: The knock amplitude corresponding to the knock phenomenon and the baseline amplitude corresponding to the vehicle are obtained, wherein the baseline amplitude is used to characterize the signal amplitude corresponding to the signal output by the knock sensor when the vehicle does not experience knock phenomenon. The detonation intensity of the detonation phenomenon is obtained based on the quotient of the detonation amplitude and the baseline amplitude. The detonation level is determined based on the detonation intensity.

7. The method according to claim 5, characterized in that, The initial injection parameters include at least one of the following: initial injection timing, initial injection frequency, initial injection quantity, and initial intake valve closing timing; the initial injection parameters are adjusted based on the knock level and the fuel type to obtain target injection parameters, including: Based on the knock level, determine the timing advance corresponding to the initial injection time, the frequency change of the initial injection frequency, and the timing delay of the initial intake valve closing time; Based on the fuel type, determine the adjustment value of the initial fuel injection quantity; The initial injection timing is adjusted based on the time advance to obtain the target injection timing, and the initial injection frequency is adjusted based on the frequency change to obtain the target injection frequency, and the initial intake valve closing timing is adjusted based on the time delay to obtain the target intake valve closing timing, and the initial injection quantity is adjusted based on the adjustment value to obtain the target injection quantity. The target injection parameters are obtained based on the target injection time, the target injection frequency, the target intake valve closing time, and the target injection quantity.

8. An engine control device, characterized in that, include: The status monitoring module is used to monitor the operating status of the vehicle and obtain status monitoring results, wherein the status monitoring results are used to characterize whether the current operating status of the vehicle is experiencing knocking. The parameter acquisition module is used to acquire the fuel quality of the fuel currently used by the vehicle, as well as the current operating status parameters and first control parameters of the engine, in response to the state monitoring result indicating that the vehicle's current operating state has knocking. The fuel quality is used to reflect the combustion capacity of the fuel in multiple dimensions. The parameter adjustment module is used to adjust the first control parameter based on the fuel quality and the operating status parameters to obtain the target control parameter; An engine control module is used to control the operation of the engine based on the target control parameters.

9. A vehicle, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored executable program, wherein, when the executable program is executed, it controls the device on which the storage medium is located to perform the method according to any one of claims 1 to 7.

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