A method, device, equipment and medium for controlling engine torque

Abstract

This invention relates to the field of vehicle control, specifically to a method, device, equipment, and medium for controlling engine torque. This application achieves real-time fuel quality determination by acquiring and analyzing pre-ignition characteristic parameters when pre-ignition occurs in the engine. Secondly, relying on this real-time identification mechanism, it can distinguish between normal fuel and inferior fuel conditions, avoiding the engine remaining in a dangerous state due to unclear fuel quality, and providing a reliable basis for subsequent protection control. Then, after confirming inferior fuel, it actively limits the engine output torque according to a first torque limitation level, effectively reducing combustion load and cylinder pressure, suppressing pre-ignition and knocking phenomena caused by inferior fuel, and overcoming the deficiency of existing technologies that lack corresponding protection measures after identification. Finally, through the linkage control of the above identification and torque limitation, the impact and damage of knocking on key components such as the engine block and pistons can be reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle control, and more specifically to a method, device, equipment, and medium for controlling engine torque. Background Technology

[0002] Methanol fuel for vehicles is gradually being promoted and applied in domestic and international markets as an alternative energy source. However, some gas stations supply methanol fuel with substandard quality, including excessive methanol content, insufficient purity, and unqualified additives. Vehicles refueling with inferior fuel are prone to engine knocking, excessive exhaust emissions, and catalytic converter poisoning. Long-term use can damage critical components such as pistons, valves, and fuel systems, severely impacting engine reliability and vehicle lifespan. These problems not only reduce user experience but also trigger numerous after-sales complaints, leading to quality claims and damage to brand reputation for vehicle manufacturers, thus hindering the market promotion of methanol fuel vehicles. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a method, device, equipment and medium for controlling engine torque, in order to solve the problems of existing technologies being unable to identify the quality of methanol fuel in real time, and unable to protect the engine after identifying inferior fuel, making it difficult to avoid knocking and damage to parts.

[0004] In a first aspect, embodiments of the present invention provide a method for controlling engine torque, the method comprising: When pre-ignition is detected in the vehicle's engine, pre-ignition characteristic parameters are acquired, and the pre-ignition characteristic parameters are analyzed to determine whether the engine's fuel is of poor quality. If the fuel is of poor quality, the output torque of the engine is limited according to the first torque limitation level.

[0005] Furthermore, the pre-ignition characteristic parameters include the number of pre-ignition signals and the number of pre-ignitions per unit time. The analysis of the pre-ignition characteristic parameters to determine whether the engine's fuel is of poor quality includes: If the number of signals is greater than or equal to a preset number, and / or the number of pre-ignitions per unit time is greater than or equal to a preset number, then the fuel is determined to be inferior fuel. If the number of signals is less than the preset number and the number of pre-ignitions is less than the preset number, then the fuel is determined not to be inferior fuel.

[0006] Furthermore, after limiting the engine's output torque according to the first torque limiting degree, the method further includes: Send a first fuel change reminder message to the user, and after sending the first fuel change reminder message, check whether the vehicle's fuel tank has been filled with the first new fuel; If the addition of the first new fuel is detected in the fuel tank, the output torque of the engine will continue to be limited according to the first torque limitation level after the engine is started.

[0007] Furthermore, after continuing to limit the engine's output torque according to the first torque limiting degree, the method further includes: During the operation of the engine at the first torque limit, it is detected whether the engine experiences pre-ignition. If the engine does not pre-ignite, the first torque limiting degree is lifted; or, if the engine pre-ignites and the number of pre-ignitions exceeds a preset limit, the output torque of the engine is limited according to the second torque limiting degree.

[0008] Furthermore, after limiting the engine's output torque according to the first torque limiting degree, the method further includes: Continuously monitor the engine for any signs of pre-ignition; If the engine pre-ignition occurs, the output torque of the engine is limited according to the second torque limitation level, wherein the first torque limitation level is less than the second torque limitation level.

[0009] Furthermore, after limiting the engine's output torque according to the second torque limiting degree, the method further includes: Send a second fuel change reminder message to the user, and after sending the second fuel change reminder message, check whether the vehicle's fuel tank has been filled with the second additional fuel; If it is detected that a second new fuel has been added to the fuel tank, the second torque limitation will be temporarily lifted, and after the engine is started, it will be detected whether the second new fuel is of poor quality. If the second added fuel is not inferior fuel, then the first torque limiting degree and the second torque limiting degree are lifted; or, if the second added fuel is inferior fuel, then the output torque of the engine continues to be limited according to the second torque limiting degree, or the engine is controlled to stop.

[0010] Furthermore, the method also includes: Within the current detection cycle, the first cumulative number of times the engine is continuously identified as inferior fuel under the first torque limitation level, or the second cumulative number of times the engine is continuously identified as inferior fuel under the second torque limitation level; If the cumulative number of times reaches the threshold number corresponding to the corresponding torque limit, the output torque of the engine is locked according to the second torque limit, and the fuel change amount of the vehicle is detected. Wherein, the threshold number of times corresponding to the first torque limit is greater than or equal to the threshold number of times corresponding to the second torque limit, and when the output torque of the engine is in a locked state, it does not respond to torque unlocking requests triggered by external means. Compare the stated fuel replacement amount with the minimum fuel quantity threshold; If the fuel replacement amount is greater than or equal to the minimum fuel quantity threshold, then the fuel condition parameters of the engine under different operating conditions are collected. If it is determined from the fuel condition parameters that the fuel corresponding to the fuel replacement quantity is not inferior fuel, then the engine is unlocked, and the first torque limiting degree and the second torque limiting degree are released.

[0011] Furthermore, after collecting the fuel consumption parameters of the engine under different operating conditions, the method further includes: Extract the pre-ignition signal, cylinder pressure signal, and fuel injection quantity from the fuel operating parameters; If the number of pre-ignition signals is less than a preset number, the peak value of the cylinder pressure signal is within the normal range, and the fluctuation value of the fuel injection quantity is less than a preset fluctuation threshold, then the fuel corresponding to the fuel replacement quantity is determined to be non-inferior fuel; or, if the number of pre-ignition signals is greater than or equal to a preset number, the peak value of the cylinder pressure signal is not within the normal range, and the fluctuation value of the fuel injection quantity is greater than or equal to a preset fluctuation threshold, then the fuel corresponding to the fuel replacement quantity is determined to be inferior fuel.

[0012] Furthermore, the release of the first torque limiting degree and the second torque limiting degree includes: Detect the operating condition type of the engine; If the engine is under load, the second torque limitation is lifted, and the latest pre-ignition characteristic parameter of the engine is detected. If the latest pre-ignition characteristic parameter is lower than the corresponding threshold, the first torque limitation is lifted; or, if the engine is not under load, both the first torque limitation and the second torque limitation are lifted simultaneously.

[0013] Secondly, an engine torque control device, the device comprising: The acquisition module is used to acquire pre-ignition characteristic parameters when pre-ignition is detected in the engine of a vehicle, and analyze the pre-ignition characteristic parameters to determine whether the fuel in the engine is inferior fuel. The control module is used to limit the engine's output torque according to a first torque limitation level if the fuel is of poor quality.

[0014] Thirdly, embodiments of the present invention provide a computer device, including: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the method described in the first aspect or any corresponding embodiment thereof.

[0015] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing computer instructions that cause a computer to perform the method described in the first aspect or any of its corresponding embodiments.

[0016] This application achieves fuel quality determination by acquiring and analyzing pre-ignition characteristic parameters when pre-ignition occurs in the engine, enabling real-time judgment of whether the fuel is of poor quality. Secondly, relying on this real-time identification mechanism, it can distinguish between normal fuel and poor fuel conditions, avoiding the engine being in a dangerous state due to unclear quality, and providing a reliable basis for subsequent protection and control. Then, after confirming that it is poor fuel, it actively limits the engine output torque according to the first torque limit level, which can effectively reduce combustion load and cylinder pressure, suppress pre-ignition and knocking phenomena caused by poor fuel, and make up for the deficiency of existing technologies that lack corresponding protection measures after identification. Finally, through the above-mentioned linkage control of identification and torque limit, the impact and damage of knocking on key components such as engine block and piston can be reduced. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic flowchart of an engine torque control method according to some embodiments of the present invention; Figure 2 This is a schematic flowchart of another engine torque control method according to some embodiments of the present invention; Figure 3 This is a schematic flowchart of another engine torque control method according to some embodiments of the present invention; Figure 4 This is a structural block diagram of an engine torque control device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] According to embodiments of the present invention, a method, apparatus, device, and medium for controlling engine torque are provided. It should be noted that the steps shown in the flowcharts in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0021] This embodiment provides a method for controlling engine torque. Figure 1 This is a flowchart of an engine torque control method according to an embodiment of the present invention, such as... Figure 1 As shown, the process includes the following steps: Step S101: When pre-ignition is detected in the vehicle's engine, pre-ignition characteristic parameters are acquired and analyzed to determine whether the engine fuel is of poor quality.

[0022] In this embodiment of the application, the pre-ignition characteristic parameters include the number of pre-ignition signals and the number of pre-ignitions per unit time.

[0023] The method of analyzing pre-ignition characteristic parameters to determine whether the engine fuel is of poor quality includes: if the number of signals is greater than or equal to a preset number, and / or the number of pre-ignitions per unit time is greater than or equal to a preset number, then the fuel is determined to be of poor quality; if the number of signals is less than a preset number, and the number of pre-ignitions is less than a preset number, then the fuel is determined not to be of poor quality.

[0024] Specifically, the system monitors three parameters in real time: engine status, pre-ignition count, and refueling indicator. This determines whether the basic conditions for activating fuel quality identification are met, ensuring that the identification process is initiated only under reasonable operating conditions.

[0025] When pre-ignition is detected in a vehicle engine, a fuel quality identification process is triggered. Using hardware such as engine cylinder pressure sensors and knock sensors, pre-ignition signals are collected in real time and processed to obtain pre-ignition characteristic parameters. These parameters include the number of pre-ignition signals (cumulative pre-ignition counts) and the number of pre-ignitions per unit time (pre-ignition frequency). After obtaining these parameters, they are analyzed according to preset judgment rules: if the number of pre-ignition signals is greater than or equal to a preset number, and / or the number of pre-ignitions per unit time is greater than or equal to a preset number, the fuel used by the engine is directly determined to be inferior fuel; if the number of pre-ignition signals is less than a preset number, and the number of pre-ignitions per unit time is less than a preset number, the fuel is determined not to be inferior fuel.

[0026] In step S102, if the fuel is of poor quality, the engine output torque is limited according to the first torque limitation level.

[0027] In this embodiment, when the fuel is determined to be substandard, a graded protection mechanism is activated to constrain the engine's output torque according to a first torque limitation level. Specifically, by adjusting core control parameters such as engine fuel injection quantity, ignition advance angle, and intake air volume, the engine output torque is limited to a preset safe range (e.g., 60%-70% of the rated torque). This avoids high torque operation exacerbating pre-ignition while preserving the vehicle's low-speed and idling capabilities, making it convenient for users to go to gas stations to replace the fuel with qualified fuel.

[0028] Simultaneously, a clear warning is displayed on the vehicle's instrument panel, informing the user via text or a yellow warning light, "The fuel quality is poor; please change the fuel as soon as possible." Throughout this process, monitoring for pre-ignition continues, collecting pre-ignition signals, updating pre-ignition characteristic parameters, and determining in real time whether pre-ignition caused by inferior fuel is still ongoing.

[0029] This application achieves fuel quality determination by acquiring and analyzing pre-ignition characteristic parameters when pre-ignition occurs in the engine, enabling real-time judgment of whether the fuel is of poor quality. Secondly, relying on this real-time identification mechanism, it can distinguish between normal fuel and poor fuel conditions, avoiding the engine being in a dangerous state due to unclear quality, and providing a reliable basis for subsequent protection and control. Then, after confirming that it is poor fuel, it actively limits the engine output torque according to the first torque limit level, which can effectively reduce combustion load and cylinder pressure, suppress pre-ignition and knocking phenomena caused by poor fuel, and make up for the deficiency of existing technologies that lack corresponding protection measures after identification. Finally, through the above-mentioned linkage control of identification and torque limit, the impact and damage of knocking on key components such as engine block and piston can be reduced.

[0030] Figure 2 This is a flowchart of an engine torque control method according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps: Step S201: When pre-ignition is detected in the vehicle's engine, pre-ignition characteristic parameters are acquired and analyzed to determine whether the engine fuel is of poor quality.

[0031] In this embodiment, the pre-ignition characteristic parameters include the number of pre-ignition signals and the number of pre-ignitions per unit time. Analyzing the pre-ignition characteristic parameters to determine whether the engine fuel is of poor quality includes: if the number of signals is greater than or equal to a preset number, and / or the number of pre-ignitions per unit time is greater than or equal to a preset number, then the fuel is determined to be of poor quality; if the number of signals is less than a preset number, and the number of pre-ignitions is less than a preset number, then the fuel is determined not to be of poor quality.

[0032] Specifically, the system monitors three parameters in real time: engine status, pre-ignition count, and refueling indicator. This determines whether the basic conditions for activating fuel quality identification are met, ensuring that the identification process is initiated only under reasonable operating conditions.

[0033] When pre-ignition is detected in a vehicle engine, a fuel quality identification process is triggered. Using hardware such as engine cylinder pressure sensors and knock sensors, pre-ignition signals are collected in real time and processed to obtain pre-ignition characteristic parameters. These parameters include the number of pre-ignition signals (cumulative pre-ignition counts) and the number of pre-ignitions per unit time (pre-ignition frequency). After obtaining these parameters, they are analyzed according to preset judgment rules: if the number of pre-ignition signals is greater than or equal to a preset number, and / or the number of pre-ignitions per unit time is greater than or equal to a preset number, the fuel used by the engine is directly determined to be inferior fuel; if the number of pre-ignition signals is less than a preset number, and the number of pre-ignitions per unit time is less than a preset number, the fuel is determined not to be inferior fuel.

[0034] In step S202, if the fuel is of poor quality, the engine output torque is limited according to the first torque limitation level.

[0035] In this embodiment, when the fuel is determined to be substandard, a graded protection mechanism is activated to constrain the engine's output torque according to a first torque limitation level. Specifically, by adjusting core control parameters such as engine fuel injection quantity, ignition advance angle, and intake air volume, the engine output torque is limited to a preset safe range (e.g., 60%-70% of the rated torque). This avoids high torque operation exacerbating pre-ignition while preserving the vehicle's low-speed and idling capabilities, making it convenient for users to go to gas stations to replace the fuel with qualified fuel.

[0036] Step S203: Send a first fuel change reminder message to the user, and after sending the first fuel change reminder message, check whether the vehicle's fuel tank has been filled with the first new fuel.

[0037] In this embodiment, after limiting the engine output torque according to the first torque limitation level, the user prompt process is immediately triggered, and the first fuel replacement prompt message is sent to the user. For example, the message "Fuel quality abnormal, please replace with qualified fuel as soon as possible" is displayed in yellow on the instrument panel, accompanied by intermittent prompt sounds. In some models, a text reminder is pushed to the vehicle's infotainment system at the same time, informing the user of the current fuel problem in a gentle and clear manner.

[0038] After sending the prompt message, the fuel tank filling detection mechanism is activated. The fuel tank level sensor collects fuel tank level data in real time, and cross-validates it with the fuel tank cap switch sensor signal. Only when the detected fuel level increase is greater than or equal to the preset filling threshold, and the fuel tank cap undergoes a state change from open to closed, is it determined that the first additional fuel has been added to the fuel tank. This eliminates false judgments caused by factors such as fuel level sensor drift and road bumps.

[0039] In step S204, if the addition of the first new fuel to the fuel tank is detected, the engine output torque will continue to be limited according to the first torque limitation level after the engine is started.

[0040] In this embodiment, if the fuel level sensor and the fuel tank cap switch sensor cross-verify that the fuel tank has been filled with the first additional fuel, then the engine start-up status is waited for and monitored. After the engine is detected to have started successfully and entered a stable operating condition, the torque limit is not immediately lifted. Instead, the output torque of the engine is maintained and constrained according to the previously set first torque limit level. The limiting parameters of fuel injection quantity, ignition advance angle and intake air quantity remain unchanged, so that the engine continues to work within the preset safe torque range. This provides a stable judgment condition for subsequent re-monitoring of pre-ignition phenomenon and avoids the accuracy of secondary verification of fuel quality caused by fluctuations in engine operating conditions due to torque recovery.

[0041] In this embodiment of the application, after continuing to limit the engine output torque according to the first torque limiting degree, the method further includes: Step A1: While the engine is running at the first torque limit, check whether the engine is experiencing pre-ignition.

[0042] In this embodiment, while the engine is running stably according to the first torque limit, the engine operation signal is continuously collected by hardware such as cylinder pressure sensor and knock sensor, and the pre-ignition related characteristic parameters are monitored and statistically analyzed in real time, including the number of pre-ignition signals and the number of pre-ignitions per unit time. It is continuously determined whether the engine will experience pre-ignition again after adding the first new fuel. The monitoring logic is consistent with the monitoring method for determining inferior fuel in the above embodiment.

[0043] Step A2: If the engine does not pre-ignite, the first torque limiting level is lifted; or, if the engine pre-ignites and the number of pre-ignitions exceeds a preset limit, the engine output torque is limited according to the second torque limiting level.

[0044] In this embodiment of the application, if no pre-ignition signal is collected during continuous monitoring, and the number of pre-ignition signals and the number of pre-ignitions per unit time are both zero, that is, the engine does not pre-ignite, then the first newly added fuel is determined to be qualified fuel, the first torque limitation is lifted, and the engine fuel injection quantity, ignition advance angle and intake air quantity are restored to the original factory normal calibration parameters, so that the engine output torque returns to the normal level.

[0045] If pre-ignition is detected in the engine, and the number of pre-ignition signals and / or the number of pre-ignitions per unit time exceeds the preset limit, it is determined that the fuel being added is still of poor quality. The protection mechanism is upgraded, and the engine output torque is further restricted according to the second torque restriction level, limiting the torque to a range higher than the first restriction level (e.g., 40%-50% of the rated torque), so as to minimize the risk of damage to engine components caused by pre-ignition.

[0046] Understandably, the second torque limiting level is a torque limiting strategy with a higher constraint level and stronger protection than the first torque limiting level. Its limiting level is greater than that of the first torque limiting level, and it is activated when it is determined that the first newly added fuel is still inferior fuel and the risk of engine pre-ignition has not been eliminated.

[0047] In practice, by further reducing the amount of fuel injected into the engine and limiting the maximum speed of the engine on the basis of the first torque limit, and directly performing a protective shutdown when necessary, the torque is limited to a range higher than the first limit constraint level (e.g., 40%-50% of the rated torque). This suppresses the conditions for pre-ignition from the root, completely terminates the pre-ignition condition, and minimizes the damage to engine components such as cylinder block, piston, and valve caused by continuous pre-ignition.

[0048] Figure 3 This is a flowchart of an engine torque control method according to an embodiment of the present invention, such as... Figure 3 As shown, the process includes the following steps: Step S301: Send a second fuel change reminder message to the user, and after sending the second fuel change reminder message, check whether the vehicle's fuel tank has been filled with the second additional fuel.

[0049] In this embodiment, after torque limiting is applied, a second fuel replacement reminder is sent to the user. For example, the instrument panel will display flashing red text "Fuel is severely of poor quality, replace with qualified fuel," accompanied by a continuous audible alarm. Some models will also simultaneously push a reminder to the vehicle's infotainment system to ensure the user takes the potential malfunction seriously. After sending the reminder, the fuel tank filling detection process is initiated. The fuel level sensor collects fuel level change data in real time, and cross-validates this data with the signal from the fuel tank cap switch sensor. Only when the fuel level increase is greater than or equal to a preset threshold (e.g., 5L) and the fuel tank cap switch is detected to be closed is it determined that additional fuel has been added, thus avoiding misjudgments caused by fuel level sensor errors or vehicle vibrations.

[0050] In step S302, if it is detected that a second additional fuel has been added to the fuel tank, the second torque limitation is temporarily lifted, and after the engine is started, it is detected whether the second additional fuel is inferior fuel.

[0051] In this embodiment, after confirming the addition of the second new fuel, the previous torque control logic is not retained; instead, the constraint of the second torque limit on the engine output torque is temporarily lifted. Subsequently, the engine's start-stop status is continuously monitored. When the engine is detected to be running, the fuel quality identification process is reactivated. The engine's cylinder pressure sensor and knock sensor are used to collect pre-ignition signals during engine operation. The collected signals are filtered and processed to obtain two types of pre-ignition characteristic parameters: the number of pre-ignition signals and the number of pre-ignition events per unit time. Following the judgment rules in the above embodiment, the quality detection of the second new fuel is completed, determining whether the second new fuel is of inferior quality.

[0052] In step S303, if the second added fuel is not inferior fuel, the first torque limiting degree and the second torque limiting degree are released; or, if the second added fuel is inferior fuel, the engine output torque is continued to be limited according to the second torque limiting degree, or the engine is controlled to stop.

[0053] In this embodiment of the application, if it is determined that the second added fuel is not inferior fuel, it means that the user has added qualified fuel. At this time, the first and second torque limiting degrees are simultaneously released. By restoring the fuel injection quantity, ignition advance angle, and intake air volume to the normal range, the engine output torque is restored to the rated value. At the same time, the second fuel replacement reminder information on the instrument panel is cleared and the audible alarm is turned off, so that the vehicle returns to normal driving status.

[0054] The process of releasing the first torque limiting degree and the second torque limiting degree includes: detecting the engine's operating condition; if the engine is under load, releasing the second torque limiting degree and detecting the engine's latest pre-ignition characteristic parameter; if the latest pre-ignition characteristic parameter is lower than the corresponding threshold, releasing the first torque limiting degree; or, if the engine is not under load, releasing both the first torque limiting degree and the second torque limiting degree simultaneously.

[0055] Specifically, the system collects and comprehensively assesses multiple operating status information of the vehicle and engine in real time, including key parameters such as current engine speed, accelerator pedal opening, fuel injection quantity, vehicle speed, load percentage, and coolant temperature. Through a built-in operating condition recognition algorithm, it categorizes the engine's current operating state to accurately determine whether the engine is idling, operating under load, partially loaded, under high load, or without load. Based on preset judgment conditions, states with a throttle opening greater than zero, the vehicle in motion, and output torque not zero are classified as load operating conditions, while states such as idling, coasting, and no power output are classified as unload operating conditions. This provides accurate operating condition judgment basis for subsequent differentiated torque limit release strategies, ensuring that the release logic matches the actual engine operating state.

[0056] After determining the engine operating condition, a corresponding graded torque release strategy is executed according to different operating conditions. If the engine is under load, in order to ensure smooth driving and safety, the second torque limit with higher restriction intensity is released first, while the first torque limit is maintained as a transitional protection. The latest pre-ignition characteristic parameters during the engine combustion process are collected in real time by knock sensor and cylinder pressure sensor, including the number of pre-ignition signals and the number of pre-ignitions per unit time. These parameters are compared with the corresponding normal fuel threshold. When the latest pre-ignition characteristic parameters are all lower than the corresponding threshold, the second additional fuel is confirmed to be qualified, and the first torque limit is gradually released to achieve a smooth recovery.

[0057] If the engine is operating under no-load conditions, such as a stable idling speed, and there is no risk of driving shock, a release command is sent simultaneously to release the first torque limit and the second torque limit at once, quickly restoring the engine output torque to normal and clearing the corresponding fuel warning information on the instrument panel.

[0058] In this embodiment of the application, the method further includes: Step B1: Within the current detection cycle, obtain the first cumulative number of times the engine is continuously identified as inferior fuel under the first torque limit, or the second cumulative number of times the engine is continuously identified as inferior fuel under the second torque limit.

[0059] In this embodiment, a fixed detection cycle for fuel quality identification is first obtained. In each detection cycle, fuel quality is determined according to a preset rule (i.e., by comparing the number of pre-ignition signals, the number of pre-ignitions per unit time with the corresponding threshold, it is determined whether the fuel is inferior fuel). The determination process is also synchronously associated with the torque limitation level of the engine at present.

[0060] The cumulative number of consecutive instances of substandard fuel under two torque limitation levels is counted independently: a first cumulative count and a second cumulative count. When the engine is running at the first torque limitation level, if the current test cycle determines the fuel to be substandard, the first cumulative count is incremented by 1; if it is determined to be acceptable fuel, the first cumulative count is reset to zero. When the engine is running at the second torque limitation level, if the current test cycle determines the fuel to be substandard, the second cumulative count is incremented by 1; if it is determined to be acceptable fuel, the second cumulative count is reset to zero. During the counting process, the real-time data of the first and second cumulative counts are stored and synchronously updated to the non-volatile storage area of ​​the engine ECU. This prevents the loss of both types of cumulative counts due to vehicle power failure, ensuring that the counting only applies to consecutive instances of substandard fuel under the corresponding torque limitation level and eliminating interference from occasional acceptable fuel determinations.

[0061] Step B2: If the first cumulative count reaches the threshold corresponding to the first torque limit, the engine output torque is locked according to the second torque limit; or, if the second cumulative count reaches the threshold corresponding to the second torque limit, the engine is stopped and the vehicle's fuel replacement amount is detected. Wherein, when the threshold corresponding to the first torque limit is greater than or equal to the threshold corresponding to the second torque limit, the engine output torque is locked and external torque unlocking requests are not responded to.

[0062] In this embodiment, two threshold values ​​for the number of times corresponding to two different levels of torque limitation are preset, and the threshold value for the number of times corresponding to the first level of torque limitation is greater than or equal to the threshold value for the number of times corresponding to the second level of torque limitation (for example, the first threshold value is set to 3 times and the second threshold value is set to 2 times). The first and second cumulative counts are compared with the corresponding threshold values ​​in real time, and different depth protection strategies are executed accordingly. If the first cumulative count reaches the threshold corresponding to the first torque limit level, it means that the risk of pre-ignition caused by poor quality fuel still exists and has not been alleviated under the first torque limit protection. At this time, the torque limit upgrade mechanism is triggered, and the output torque of the engine is locked according to the second torque limit level. Specifically, by fixing core control parameters such as fuel injection quantity and ignition advance angle, the torque is forcibly limited to a lower safe range. This locked state is not subject to intervention by normal operation. Even if the user tries to trigger the torque unlocking request through external means such as accelerator pedal or fault clearing command, the ECU will directly block such commands to ensure that the torque lock state is not easily released.

[0063] If the second cumulative count reaches the threshold corresponding to the second torque limit level, it indicates that the risk of pre-ignition caused by inferior fuel has not been eliminated even under a higher level of torque limit protection, and is approaching the critical value for engine damage. At this time, the engine is shut down to terminate the pre-ignition condition and avoid damage to core components. At the same time, the fuel replacement quantity detection process is started simultaneously. Through a high-precision fuel quantity sensor in the fuel tank, the absolute value and change of the fuel quantity in the tank are collected in real time. Combined with auxiliary signals such as the fuel tank cap opening and closing status and engine start-stop records, the amount of fuel added in the fuel tank after the engine is shut down is calculated, providing data support for subsequent fuel replacement verification.

[0064] Step B3: Compare the fuel replacement amount with the minimum fuel quantity threshold.

[0065] In this embodiment, a minimum fuel quantity threshold preset based on the fuel tank volume and fuel mixing and dilution effect is first retrieved. Then, the current newly added fuel volume is extracted from the fuel replacement quantity detection data after the engine torque is locked. The fuel replacement quantity is then subjected to error correction processing to eliminate the fuel quantity sensor reading deviation caused by factors such as vehicle bumps and oil temperature changes, so as to obtain the corrected actual fuel replacement quantity. Subsequently, the corrected actual fuel replacement quantity is compared with the minimum fuel quantity threshold, and the effectiveness of the fuel replacement is determined based on the comparison result.

[0066] Step B4: If the fuel replacement amount is greater than or equal to the minimum fuel quantity threshold, then collect the fuel condition parameters of the engine under different operating conditions.

[0067] In this embodiment, when the comparison determines that the fuel replacement amount is greater than or equal to the minimum fuel quantity threshold, the engine is controlled to enter a preset multi-condition detection process, which sequentially makes the engine run stably under idling, partial load, and medium load conditions, ensuring that the operating parameters such as water temperature and speed are stable without fluctuation. Under each stable operating condition, multi-dimensional fuel operating parameters, including the number of pre-ignition signals, the number of pre-ignitions per unit time, the peak cylinder pressure, the fuel injection quantity fluctuation value, and the combustion duration, are collected simultaneously.

[0068] Step B5: If the fuel corresponding to the fuel replacement quantity is not inferior fuel according to the fuel condition parameters, then the engine is unlocked and the first torque limit and the second torque limit are released.

[0069] In this embodiment, if by analyzing fuel operating parameters, it is determined that the number of pre-ignition signals is less than a preset number, the peak value of the cylinder pressure signal is within the normal range, and the fluctuation value of the fuel injection quantity is less than a preset fluctuation threshold, then it is determined that the current fuel is not inferior fuel. The engine is then controlled to release the torque lock-up state, and a differentiated release strategy is executed according to the real-time engine operating conditions: if the engine is under load, the second torque limit is released first, and the first torque limit is released after monitoring that the latest pre-ignition characteristic parameters are lower than the corresponding threshold; if the engine is not under load, the first torque limit and the second torque limit are released simultaneously, restoring the engine to normal output state.

[0070] In this embodiment of the application, after collecting the fuel condition parameters of the engine under different operating conditions, the method further includes: extracting the pre-ignition signal, cylinder pressure signal, and fuel injection quantity from the fuel condition parameters; if the number of pre-ignition signals is less than a preset number, the peak value of the cylinder pressure signal is in the normal range, and the fluctuation value of the fuel injection quantity is less than a preset fluctuation threshold, then it is determined that the fuel corresponding to the fuel replacement quantity is not inferior fuel; or, if the number of pre-ignition signals is greater than or equal to a preset number, the peak value of the cylinder pressure signal is not in the normal range, and the fluctuation value of the fuel injection quantity is greater than or equal to a preset fluctuation threshold, then it is determined that the fuel corresponding to the fuel replacement quantity is inferior fuel.

[0071] Specifically, in this embodiment, after collecting fuel condition parameters under different engine operating conditions, a parameter screening and extraction process is initiated. From the collected multi-dimensional fuel condition parameters, three core parameters are selected: pre-ignition signal, cylinder pressure signal, and fuel injection quantity. Among them, the pre-ignition signal focuses on extracting the signal quantity and the number of pre-ignitions per unit time; the cylinder pressure signal focuses on extracting the peak cylinder pressure data; and the fuel injection quantity focuses on extracting the fuel injection quantity fluctuation value. This ensures that the extracted parameters accurately correspond to the fuel quality judgment requirements and provide core data support for subsequent fuel quality judgment. During the extraction process, the integrity of the parameters is simultaneously verified to avoid distortion of the judgment results due to missing parameters.

[0072] If the number of pre-ignition signals is less than a preset number, the peak value of the cylinder pressure signal is within the normal range, and the fluctuation value of the fuel injection quantity is less than a preset fluctuation threshold, then the fuel corresponding to the fuel replacement quantity is determined to be non-inferior fuel; or, if the number of pre-ignition signals is greater than or equal to a preset number, the peak value of the cylinder pressure signal is not within the normal range, and the fluctuation value of the fuel injection quantity is greater than or equal to a preset fluctuation threshold, then the fuel corresponding to the fuel replacement quantity is determined to be inferior fuel. In this embodiment, after extracting the core parameters, a comprehensive judgment is performed according to the preset fuel quality judgment rules: first, the preset pre-ignition signal quantity threshold, the normal range of the cylinder pressure peak value, and the fuel injection quantity fluctuation threshold are retrieved. The number of pre-ignition signals extracted is then compared with a preset number, the peak value of the cylinder pressure signal is compared with the normal range, and the fluctuation value of the fuel injection quantity is compared with a preset fluctuation threshold. Only when all three conditions are met simultaneously—the number of pre-ignition signals is less than the preset number, the peak value of the cylinder pressure signal is within the normal range, and the fluctuation value of the fuel injection quantity is less than the preset fluctuation threshold—is the fuel corresponding to the fuel replacement quantity determined to be non-inferior fuel. Conversely, if any one of the conditions is met—the number of pre-ignition signals is greater than or equal to the preset number, the peak value of the cylinder pressure signal is not within the normal range, or the fluctuation value of the fuel injection quantity is greater than or equal to the preset fluctuation threshold—the fuel corresponding to the fuel replacement quantity is determined to be inferior fuel.

[0073] This embodiment also provides an engine torque control device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0074] This embodiment provides an engine torque control device, such as... Figure 4 As shown, it includes: The acquisition module 401 is used to acquire pre-ignition characteristic parameters when pre-ignition is detected in the engine of a vehicle, and analyze the pre-ignition characteristic parameters to determine whether the engine fuel is inferior fuel. The control module 402 is used to limit the engine output torque according to a first torque limitation level if the fuel is of poor quality.

[0075] In this embodiment of the application, the pre-ignition characteristic parameters include the number of pre-ignition signals and the number of pre-ignitions per unit time.

[0076] In this embodiment of the application, the acquisition module 401 is used to determine that the fuel is inferior fuel if the number of signals is greater than or equal to a preset number, and / or the number of pre-ignitions per unit time is greater than or equal to a preset number; if the number of signals is less than a preset number and the number of pre-ignitions is less than a preset number, then the fuel is determined not to be inferior fuel.

[0077] In this embodiment of the application, the device further includes: a first prompting module, used to send a first fuel replacement prompt message to the user, and after sending the first fuel replacement prompt message, to detect whether the vehicle's fuel tank has been filled with the first additional fuel; if the first additional fuel is detected in the fuel tank, then after the engine is started, the output torque of the engine continues to be limited according to the first torque limiting degree.

[0078] In this embodiment of the application, the device further includes: a first detection module, used to detect whether the engine has pre-ignition during the process of the engine running according to the first torque limiting degree; if the engine does not have pre-ignition, the first torque limiting degree is released; or, if the engine has pre-ignition and the corresponding number of pre-ignitions exceeds a preset limit, the output torque of the engine is limited according to the second torque limiting degree.

[0079] In this embodiment of the application, the device further includes: a second detection module, used to continuously monitor whether the engine has pre-ignition; if the engine has pre-ignition, the output torque of the engine is limited according to a second torque limiting degree, wherein the second torque limiting degree is greater than the first torque limiting degree.

[0080] In this embodiment, the device further includes: a prompting module, configured to send a second fuel replacement prompt to the user, and after sending the second fuel replacement prompt, detect whether the vehicle's fuel tank has been filled with a second new fuel; if the addition of the second new fuel is detected in the fuel tank, the second torque limiting degree is temporarily released, and after the engine is started, the second new fuel is detected as inferior fuel; if the new fuel is not inferior fuel, the first torque limiting degree and the second torque limiting degree are released; or, if the new fuel is inferior fuel, the engine output torque is continued to be limited according to the second torque limiting degree, or the engine is controlled to stop.

[0081] In this embodiment, the device further includes: a statistics module, used to acquire, within the current detection cycle, the first cumulative number of times the engine is continuously identified as inferior fuel under a first torque limit, or the second cumulative number of times the engine is continuously identified as inferior fuel under a second torque limit; if the cumulative number reaches the threshold number corresponding to the corresponding torque limit, the output torque of the engine is locked according to the second torque limit, and the fuel replacement amount of the vehicle is detected, wherein the threshold number corresponding to the first torque limit is greater than or equal to the threshold number corresponding to the second torque limit, and when the output torque of the engine is in a locked state, it does not respond to torque unlocking requests triggered by external factors; the fuel replacement amount is compared with a minimum fuel quantity threshold; if the fuel replacement amount is greater than or equal to the minimum fuel quantity threshold, fuel condition parameters of the engine under different operating conditions are collected; if it is determined according to the fuel condition parameters that the fuel corresponding to the fuel replacement amount is not inferior fuel, the engine is controlled to unlock, and the first torque limit and the second torque limit are released.

[0082] In this embodiment of the application, the device further includes: an analysis module, used to extract pre-ignition signal, cylinder pressure signal and fuel injection quantity from fuel operating parameters; if the number of pre-ignition signals is less than a preset number, the peak value of the cylinder pressure signal is in the normal range, and the fluctuation value of the fuel injection quantity is less than a preset fluctuation threshold, then it is determined that the fuel corresponding to the fuel replacement quantity is not inferior fuel; or, if the number of pre-ignition signals is greater than or equal to a preset number, the peak value of the cylinder pressure signal is not in the normal range, and the fluctuation value of the fuel injection quantity is greater than or equal to a preset fluctuation threshold, then it is determined that the fuel corresponding to the fuel replacement quantity is inferior fuel.

[0083] In this embodiment of the application, the device further includes: a release module, used to detect the engine's operating condition type; if the engine is under load operating condition, the second torque limitation level is released, and the latest pre-ignition characteristic parameter of the engine is detected; if the latest pre-ignition characteristic parameter is lower than the corresponding threshold, the first torque limitation level is released; or, if the engine is not under load operating condition, the first torque limitation level and the second torque limitation level are released simultaneously.

[0084] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 5As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system).

[0085] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0086] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0087] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device as shown by a landing page for an app. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, which can be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0088] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0089] The computer device also includes a communication interface 30 for communicating with other devices or communication networks.

[0090] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0091] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for controlling engine torque, characterized in that, The method includes: When pre-ignition is detected in the vehicle's engine, pre-ignition characteristic parameters are acquired, and the pre-ignition characteristic parameters are analyzed to determine whether the engine's fuel is of poor quality. If the fuel is of poor quality, the output torque of the engine is limited according to the first torque limitation level.

2. The method according to claim 1, characterized in that, The pre-ignition characteristic parameters include the number of pre-ignition signals and the number of pre-ignitions per unit time. The analysis of the pre-ignition characteristic parameters to determine whether the engine's fuel is of poor quality includes: If the number of signals is greater than or equal to a preset number, and / or the number of pre-ignitions per unit time is greater than or equal to a preset number, then the fuel is determined to be inferior fuel. If the number of signals is less than the preset number and the number of pre-ignitions is less than the preset number, then the fuel is determined not to be inferior fuel.

3. The method according to claim 1, characterized in that, After limiting the engine's output torque according to a first torque limiting degree, the method further includes: Send a first fuel change reminder message to the user, and after sending the first fuel change reminder message, check whether the vehicle's fuel tank has been filled with the first new fuel; If the addition of the first new fuel is detected in the fuel tank, the output torque of the engine will continue to be limited according to the first torque limitation level after the engine is started.

4. The method according to claim 3, characterized in that, After continuing to limit the engine's output torque according to the first torque limiting degree, the method further includes: During the operation of the engine at the first torque limit, it is detected whether the engine experiences pre-ignition. If the engine does not pre-ignite, the first torque limiting degree is lifted; or, if the engine pre-ignites and the number of pre-ignitions exceeds a preset limit, the output torque of the engine is limited according to the second torque limiting degree.

5. The method according to claim 1, characterized in that, After limiting the engine's output torque according to a first torque limiting degree, the method further includes: Continuously monitor the engine for any signs of pre-ignition; If the engine pre-ignition occurs, the output torque of the engine is limited according to a second torque limitation level, wherein the first torque limitation level is less than the second torque limitation level.

6. The method according to claim 4 or 5, characterized in that, After limiting the engine's output torque according to the second torque limiting degree, the method further includes: Send a second fuel change reminder message to the user, and after sending the second fuel change reminder message, check whether the vehicle's fuel tank has been filled with the second additional fuel; If it is detected that a second new fuel has been added to the fuel tank, the second torque limitation will be temporarily lifted, and after the engine is started, it will be detected whether the second new fuel is of poor quality. If the second added fuel is not inferior fuel, then the first torque limiting degree and the second torque limiting degree are lifted; or, if the second added fuel is inferior fuel, then the output torque of the engine continues to be limited according to the second torque limiting degree, or the engine is controlled to stop.

7. The method according to claim 1, characterized in that, The method further includes: Within the current detection cycle, the first cumulative number of times the engine is continuously identified as inferior fuel under the first torque limitation level, or the second cumulative number of times the engine is continuously identified as inferior fuel under the second torque limitation level; If the cumulative number of times reaches the threshold number corresponding to the corresponding torque limit, the output torque of the engine is locked according to the second torque limit, and the fuel change amount of the vehicle is detected. Wherein, the threshold number of times corresponding to the first torque limit is greater than or equal to the threshold number of times corresponding to the second torque limit, and when the output torque of the engine is in a locked state, it does not respond to torque unlocking requests triggered by external means. Compare the stated fuel replacement amount with the minimum fuel quantity threshold; If the fuel replacement amount is greater than or equal to the minimum fuel quantity threshold, then the fuel condition parameters of the engine under different operating conditions are collected. If it is determined from the fuel condition parameters that the fuel corresponding to the fuel replacement quantity is not inferior fuel, then the engine is unlocked, and the first torque limiting degree and the second torque limiting degree are released.

8. The method according to claim 7, characterized in that, After collecting the fuel condition parameters of the engine under different operating conditions, the method further includes: Extract the pre-ignition signal, cylinder pressure signal, and fuel injection quantity from the fuel operating parameters; If the number of pre-ignition signals is less than a preset number, the peak value of the cylinder pressure signal is within the normal range, and the fluctuation value of the fuel injection quantity is less than a preset fluctuation threshold, then the fuel corresponding to the fuel replacement quantity is determined to be non-inferior fuel; or, if the number of pre-ignition signals is greater than or equal to a preset number, the peak value of the cylinder pressure signal is not within the normal range, and the fluctuation value of the fuel injection quantity is greater than or equal to a preset fluctuation threshold, then the fuel corresponding to the fuel replacement quantity is determined to be inferior fuel.

9. The method according to claim 7, characterized in that, The release of the first torque limiting degree and the second torque limiting degree includes: Detect the operating condition type of the engine; If the engine is under load, the second torque limitation is lifted, and the latest pre-ignition characteristic parameter of the engine is detected. If the latest pre-ignition characteristic parameter is lower than the corresponding threshold, the first torque limitation is lifted; or, if the engine is not under load, both the first torque limitation and the second torque limitation are lifted simultaneously.

10. A device for controlling engine torque, characterized in that, The device includes: The acquisition module is used to acquire pre-ignition characteristic parameters when pre-ignition is detected in the engine of a vehicle, and analyze the pre-ignition characteristic parameters to determine whether the fuel in the engine is inferior fuel. The control module is used to limit the engine's output torque according to a first torque limitation level if the fuel is of poor quality.

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