Vehicle and determination method and device of torque monitoring threshold value thereof and storage medium

Abstract

The application discloses a vehicle and a determination method and device of a torque monitoring threshold of the vehicle and a storage medium. The determination method of the torque monitoring threshold of the vehicle comprises the following steps: setting a current gear of the vehicle to a preset gear and setting a current rotating speed of an engine of the vehicle to a preset rotating speed, and then controlling the engine to operate at a maximum allowed engine parameter corresponding to the current gear and the current rotating speed; acquiring an actual output torque of the engine in real time, and acquiring a current maximum allowed torque; when the actual output torque of the engine is greater than the current maximum allowed torque, sending a monitoring fault reminding signal to a fault monitoring module, so that the fault monitoring module controls an operating state of the vehicle in response to the monitoring fault reminding signal, and the operating state of the vehicle is acquired in real time; judging whether the operating state of the vehicle meets a first functional safety requirement; and if yes, determining the current maximum allowed torque as a current torque monitoring threshold of the vehicle. The technical scheme improves the safety performance of the vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a method, apparatus, and storage medium for determining a vehicle and its torque monitoring threshold. Background Technology

[0002] Currently, the automotive industry has relatively feasible methods for detecting unintended acceleration in vehicles (engine torque monitoring), which can detect unintended acceleration and take safety measures to improve vehicle reliability and safety performance. However, there is no complete method for verifying and correcting the rationality of the torque monitoring threshold in unintended acceleration detection methods, which can be combined with functional safety requirements. This results in inaccurate timing of safety measures being taken when unintended acceleration occurs, affecting the driver's driving experience. Summary of the Invention

[0003] This invention provides a method, apparatus, and storage medium for determining a vehicle and its torque monitoring threshold, in order to solve the problems existing in the prior art, improve the rationality of the torque monitoring threshold in the detection method of unexpected acceleration, further improve the reliability and safety performance of the vehicle, and thus improve the driver's driving experience.

[0004] In a first aspect, the present invention provides a method for determining a torque monitoring threshold for a vehicle, used to monitor unintended acceleration of the vehicle, comprising:

[0005] When the current gear of the vehicle is set to a preset gear and the current speed of the vehicle's engine is set to a preset speed, the engine is controlled to operate with the maximum permissible engine parameters corresponding to the current gear and the current speed.

[0006] The engine's actual output torque is obtained in real time, as well as the current maximum allowable torque.

[0007] When the actual output torque of the engine is greater than the current maximum allowable torque, a monitoring fault reminder signal is sent to the fault monitoring module so that the fault monitoring module responds to the monitoring fault reminder signal to control the operating status of the vehicle and obtain the operating status of the vehicle in real time.

[0008] Determine whether the operating status of the vehicle meets the first functional safety requirement;

[0009] If so, the current maximum permissible torque is determined as the current torque monitoring threshold of the vehicle.

[0010] Optionally, the method for determining the torque monitoring threshold of the vehicle further includes:

[0011] If the vehicle's operating state does not meet the first functional safety requirement, the current maximum allowable torque of the engine is reduced by a first preset adjustment amount, and the process returns to the step of controlling the engine to operate with the maximum allowable engine parameters corresponding to the current gear and the current speed when the vehicle's current gear is set to a preset gear and the vehicle's current engine speed is set to a preset speed, until the vehicle's operating state meets the first functional safety requirement.

[0012] Optionally, the engine parameters include the engine's required torque or the engine's required intake air volume.

[0013] Optionally, the method for determining the torque monitoring threshold of the vehicle further includes:

[0014] Obtain the current actual demand parameters of the engine;

[0015] The engine is controlled to operate according to the current actual demand parameters, and the actual output torque of the engine is obtained in real time.

[0016] Determine whether the actual output torque of the engine is greater than the current torque monitoring threshold;

[0017] If so, the difference between the current actual demand parameter and the second preset adjustment amount is determined as the set demand parameter;

[0018] Control the engine to operate at the set required parameters and obtain the vehicle's operating status in real time;

[0019] Determine whether the operating status of the vehicle meets the second functional safety requirement;

[0020] If so, then the current torque monitoring threshold is determined to be the torque monitoring threshold of the vehicle.

[0021] Optionally, the method for determining the torque monitoring threshold of the vehicle further includes:

[0022] If the actual output torque of the engine is less than or equal to the current torque monitoring threshold, the current actual demand parameter is increased by the second preset adjustment amount, and the process returns to the steps of controlling the engine operation according to the actual demand parameter, and obtaining the actual output torque of the engine in real time to determining whether the actual output torque of the engine is greater than the current torque monitoring threshold.

[0023] Optionally, the method for determining the torque monitoring threshold of the vehicle further includes:

[0024] When the vehicle's operating state does not meet the second functional safety requirement, the current torque monitoring threshold is reduced by a third preset adjustment amount, and the process returns to the steps of obtaining the engine's current actual demand parameters and determining whether the vehicle's operating state meets the second functional safety requirement.

[0025] Optionally, the method for determining the torque monitoring threshold of the vehicle further includes:

[0026] The preset gear and preset speed are adjusted according to preset rules, and the process returns to the step of controlling the engine to run at the maximum permissible engine parameters corresponding to the current gear and the current speed of the vehicle's engine when the current gear of the vehicle is set to the preset gear and the current speed of the vehicle's engine is set to the preset speed, until the step of determining whether the operating state of the vehicle meets the first functional safety requirement is performed.

[0027] In a second aspect, the present invention provides a device for determining a torque monitoring threshold for a vehicle, used to monitor unintended acceleration of the vehicle, comprising:

[0028] The control module is used to control the engine to operate with the maximum permissible engine parameters corresponding to the current gear and the current speed when the current gear of the vehicle is set to a preset gear and the current speed of the engine of the vehicle is set to a preset speed.

[0029] The acquisition module is used to acquire the actual output torque of the engine in real time, as well as the current maximum allowable torque;

[0030] The monitoring fault reminder signal sending module is used to send a monitoring fault reminder signal to the fault monitoring module when the actual output torque of the engine is greater than the current maximum allowable torque, so that the fault monitoring module responds to the monitoring fault reminder signal to control the operating status of the vehicle and obtains the operating status of the vehicle in real time;

[0031] The judgment module is used to determine whether the operating status of the vehicle meets the first functional safety requirement;

[0032] The torque monitoring threshold determination module is used to determine the current maximum permissible torque as the current torque monitoring threshold of the vehicle when the vehicle's operating state meets the first functional safety requirement.

[0033] Thirdly, the present invention provides a vehicle, comprising: an engine and a controller;

[0034] The controller is used to perform the method for determining the torque monitoring threshold of the vehicle as described in any of the preceding descriptions.

[0035] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a processor to execute and implement the method for determining the torque monitoring threshold of a vehicle as described in any of the preceding claims.

[0036] The technical solution of this invention, by setting the vehicle's current gear to a preset gear and the vehicle's engine current speed to a preset speed, controls the engine to operate with the maximum permissible engine parameters corresponding to the current gear and current speed, and obtains the engine's actual output torque and the current maximum permissible torque in real time. When the engine's actual output torque exceeds the current maximum permissible torque, a monitoring fault alert signal is sent to the fault monitoring module. This causes the fault monitoring module to respond to the monitoring fault alert signal, control the vehicle's operating state, and obtain the vehicle's operating state in real time. When the vehicle's operating state meets the first functional safety requirement, the current maximum permissible torque is determined as the vehicle's current torque monitoring threshold. This ensures that the current torque monitoring threshold is not too low, limiting vehicle operation, nor too high, reducing vehicle safety performance. This makes the torque monitoring threshold in the unexpected acceleration detection method more reasonable, further improving vehicle reliability and safety performance, thereby enhancing the driver's driving experience.

[0037] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A flowchart illustrating a method for determining a vehicle torque monitoring threshold according to Embodiment 1 of the present invention;

[0040] Figure 2 This is a flowchart of a method for determining a vehicle torque monitoring threshold according to Embodiment 2 of the present invention;

[0041] Figure 3 A flowchart illustrating a method for determining a vehicle torque monitoring threshold according to Embodiment 3 of the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of the device for determining the torque monitoring threshold of a vehicle provided in Embodiment 4 of the present invention;

[0043] Figure 5 This is a structural block diagram of a vehicle provided in Embodiment 5 of the present invention. Detailed Implementation

[0044] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0045] It should be noted that the terms "first," "second," "target," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] Example 1

[0047] Figure 1 This is a flowchart of a method for determining a vehicle's torque monitoring threshold according to Embodiment 1 of the present invention. This embodiment is applicable to determining the torque monitoring threshold during unexpected acceleration detection of a vehicle. This method can be executed by a device for determining the vehicle's torque monitoring threshold, which can be implemented in hardware and / or software and can be configured in the vehicle's controller. Figure 1 As shown, the method includes:

[0048] S110. When setting the vehicle's current gear to a preset gear and the vehicle's engine current speed to a preset speed, control the engine to operate with the maximum permissible engine parameters corresponding to the current gear and current speed.

[0049] The unexpected acceleration detection method for vehicles based on torque monitoring calculates the maximum permissible torque of the engine at the current gear and engine speed, as well as the actual engine torque, using a redundant algorithm. When the actual engine torque exceeds the driver's required torque, unexpected acceleration is considered to have occurred. When the actual engine torque exceeds the maximum permissible torque, an abnormal engine torque is identified. In this case, a monitoring fault warning signal is issued, and the vehicle's operating status is controlled to bring the vehicle into a safe state. The aforementioned maximum permissible engine torque is the initial torque monitoring threshold in the current unexpected acceleration detection method for vehicles. Understandably, when the actual engine torque exceeds the torque monitoring threshold, it is considered abnormal, requiring the vehicle to enter a safe state. A higher torque monitoring threshold results in greater unintended acceleration during the process, a longer time required to reach a safe state, or even failure to reach a safe state altogether, potentially failing to meet the functional safety requirements of the engine management system (EMS). Conversely, a lower torque monitoring threshold results in less unintended acceleration and a shorter time required to reach a safe state. However, if the threshold is too low, a monitoring fault warning signal may be triggered before the driver perceives any unintended acceleration, thus impacting the driver's experience. Therefore, the appropriateness of the torque monitoring threshold is crucial.

[0050] In this embodiment, unexpected acceleration where the engine torque is less than but close to the torque monitoring threshold is defined as critical unexpected acceleration, and unexpected acceleration when the engine outputs its maximum torque under the current operating conditions is defined as maximum unexpected acceleration. It is understood that if controlling the vehicle's operating state to enter a safe state under maximum unexpected acceleration conditions can meet EMS functional safety requirements, then controlling the vehicle's operating state to enter a safe state under other unexpected acceleration conditions will necessarily meet EMS functional safety requirements. Therefore, a reasonable current torque monitoring threshold for the vehicle can be determined by simulating the vehicle's maximum unexpected acceleration conditions.

[0051] The maximum permissible engine parameter corresponding to the current gear and current speed can be the largest engine parameter among the calibration values ​​corresponding to the current gear and current speed in the vehicle function layer calculation strategy.

[0052] Optionally, engine parameters may include the engine's required torque or the engine's required intake air volume.

[0053] Unexpected acceleration in vehicles can be broadly categorized into two types: one is incorrect torque demand calculation, such as lookup errors or logical errors during functional torque demand calculation; the other is actuator malfunction, such as a stuck throttle or wastegate valve. The degree of unexpected acceleration varies depending on the cause of the abnormal engine torque. Therefore, by controlling the engine to operate at the maximum permissible engine torque demand corresponding to the current gear and engine speed, and by controlling the engine to operate at the maximum permissible engine intake air demand corresponding to the current gear and engine speed, the final determined vehicle torque monitoring threshold becomes more accurate, thereby further improving the rationality of the vehicle torque monitoring threshold.

[0054] S120: Real-time acquisition of the engine's actual output torque, as well as the current maximum permissible torque.

[0055] The actual output torque of the engine can be determined by measuring the engine's output torque. The current maximum permissible torque can be the maximum torque that the engine will not report a monitoring fault warning signal for the current gear and current speed, as determined by the developers based on experience. This is the maximum engine torque considered normal. When the engine torque exceeds the current maximum permissible torque, the engine torque is considered abnormal.

[0056] S130. When the actual output torque of the engine is greater than the current maximum allowable torque, a monitoring fault reminder signal is sent to the fault monitoring module so that the fault monitoring module responds to the monitoring fault reminder signal to control the vehicle's operating status and obtain the vehicle's operating status in real time.

[0057] The fault monitoring module receives fault alert signals and controls the vehicle's operating state in response to these signals. The vehicle's operating state may include, but is not limited to, the time of responding to the fault alert signal, engine power output, unexpected acceleration of the vehicle, and vehicle speed. Controlling the vehicle's operating state in response to the fault alert signal may include, but is not limited to, limiting engine power output, cutting off vehicle power output, and / or braking the vehicle. In one exemplary embodiment, controlling the vehicle's operating state in response to the fault alert signal includes braking the vehicle and limiting engine power output.

[0058] It is understandable that when the engine is controlled to run at the maximum permissible engine parameters corresponding to the current gear and current speed, the actual output torque of the engine will not jump directly from the current output torque to the maximum torque corresponding to the maximum permissible engine parameters, but will gradually increase according to the maximum permissible engine parameters.

[0059] Specifically, when the engine is controlled to run at the maximum permissible engine parameters corresponding to the current gear and current speed, as the actual output torque of the engine gradually increases according to the maximum permissible engine parameters, when the actual output torque of the engine exceeds the current maximum permissible torque, a monitoring fault reminder signal is sent to the fault monitoring module, so that the fault monitoring module responds to the fault reminder signal and controls the vehicle's operating status. At the same time, by acquiring the vehicle's operating status in real time, it is possible to determine whether the vehicle has entered a safe state based on the vehicle's operating status.

[0060] S140. Determine whether the vehicle's operating status meets the first functional safety requirement; if so, proceed to S150.

[0061] The first functional safety requirement can be an EMS functional safety requirement. For example, the first functional safety requirement requires that when responding to a monitoring fault alert signal and controlling the vehicle's operating status, the vehicle's unexpected acceleration reaches 2 m / s² within 500 ms. 2 Beforehand, the vehicle is put into a safe state (limp mode). In an exemplary embodiment, the first functional safety requirement may further include the subjective judgment of the tester and driver, i.e., whether the tester and driver felt the acceleration impact and had difficulty reacting; if the vehicle's operating state can meet the requirement of within 500ms and the vehicle's unexpected acceleration reaches 2m / s². 2 If the vehicle is brought into a safe state (limp mode), but the tester and driver experience an acceleration impact that is difficult to react to, then the vehicle's operating state does not meet the first functional safety requirement.

[0062] S150, The current maximum permissible torque is determined as the current torque monitoring threshold of the vehicle.

[0063] Specifically, as the actual output torque of the engine gradually increases according to the maximum permissible engine parameters, when the actual output torque of the engine exceeds the current maximum permissible torque, a monitoring fault reminder signal is sent to the fault monitoring module. This prompts the fault monitoring module to respond to the fault reminder signal and control the vehicle's operating status. Simultaneously, by acquiring the vehicle's operating status in real time, if the vehicle's operating status meets the first functional safety requirements, the current maximum permissible torque is considered reasonable, and the current maximum permissible torque is determined as the vehicle's current torque monitoring threshold. This ensures the vehicle's safety performance when the actual output torque of the engine exceeds the current maximum permissible torque.

[0064] In this embodiment, by setting the vehicle's current gear to a preset gear and the vehicle's engine current speed to a preset speed, the engine is controlled to operate with the maximum permissible engine parameters corresponding to the current gear and current speed. The actual output torque of the engine and the current maximum permissible torque are acquired in real time. When the actual output torque of the engine exceeds the current maximum permissible torque, a monitoring fault alert signal is sent to the fault monitoring module. This causes the fault monitoring module to respond to the monitoring fault alert signal, control the vehicle's operating state, and acquire the vehicle's operating state in real time. When the vehicle's operating state meets the first functional safety requirement, the current maximum permissible torque is determined as the vehicle's current torque monitoring threshold. This ensures that the torque monitoring threshold is not too low, which would restrict vehicle operation, nor too high, which would reduce vehicle safety performance. This makes the torque monitoring threshold in the unexpected acceleration detection method more reasonable, further improving vehicle reliability and safety performance, thereby enhancing the driver's driving experience.

[0065] Example 2

[0066] Figure 2 This is a flowchart of a method for determining a vehicle torque monitoring threshold according to Embodiment 2 of the present invention. Based on the above embodiments, this embodiment further adds a step of adjusting the engine's current maximum permissible torque when the vehicle's operating state does not meet the first functional safety requirement. Figure 2 As shown, the method specifically includes:

[0067] S210. When setting the vehicle's current gear to a preset gear and the vehicle's engine current speed to a preset speed, control the engine to operate with the maximum permissible engine parameters corresponding to the current gear and current speed.

[0068] S220: Real-time acquisition of the engine's actual output torque, as well as the current maximum permissible torque.

[0069] S230: When the actual output torque of the engine is greater than the current maximum allowable torque, a monitoring fault reminder signal is sent to the fault monitoring module so that the fault monitoring module responds to the monitoring fault reminder signal to control the vehicle's operating status and obtain the vehicle's operating status in real time.

[0070] S240. Determine whether the vehicle's operating status meets the first functional safety requirement; if not, proceed to S250; if yes, proceed to S260.

[0071] S250, reduce the current maximum permissible torque of the engine by a first preset adjustment amount, and return to execute S210 to S240 until the vehicle's operating state meets the first functional safety requirement.

[0072] The first preset adjustment amount can be an adjustment amount determined based on the accuracy requirements of the torque monitoring threshold. When the accuracy requirement for the torque monitoring threshold is low, the first preset adjustment amount can be set to a larger adjustment amount to reduce the number of times the current maximum allowable torque of the engine is adjusted, saving time. When the accuracy requirement for the torque monitoring threshold is high, the first preset adjustment amount can be set to a smaller adjustment amount to ensure the rationality of the torque monitoring threshold. In an exemplary embodiment, the first preset condition amount can be 10N.

[0073] S260, The current maximum permissible torque is determined as the current torque monitoring threshold of the vehicle.

[0074] Specifically, when the engine is controlled to run at the maximum permissible engine parameters corresponding to the current gear and current speed, if the actual output torque of the engine exceeds the current maximum permissible torque as the actual output torque gradually increases according to the maximum permissible engine parameters, a monitoring fault reminder signal is sent to the fault monitoring module. This prompts the fault monitoring module to respond to the fault reminder signal and control the vehicle's operating status. Simultaneously, by acquiring the vehicle's operating status in real time, it is determined whether the vehicle's operating status meets the first functional safety requirement. If the vehicle's operating status does not meet the first functional safety requirement, it indicates that the current maximum permissible torque is too high. In this case, the current maximum permissible torque of the engine is reduced by a first preset adjustment amount, and the engine is controlled to run at the maximum permissible engine parameters corresponding to the current gear and current speed again. This process continues until the vehicle's operating status meets the first functional safety requirement after the fault monitoring module responds to the fault reminder signal and controls the vehicle's operating status. At this point, the current maximum permissible torque that meets the first functional safety requirement is determined as the vehicle's current torque monitoring threshold.

[0075] S270, adjust the preset gear and preset speed according to the preset rules, and return to execute S210 to S240.

[0076] Among them, the preset rules can be adjustment rules that determine the adjustment amount according to the requirements of the accuracy of torque monitoring threshold and adjust the preset gear and preset speed in a certain order.

[0077] Specifically, after determining the current maximum permissible torque that meets the first functional safety requirement as the vehicle's current torque monitoring threshold, the preset gear and preset speed are adjusted according to preset rules. When the vehicle's current gear is set to the preset gear and the vehicle's engine current speed is set to the preset speed, the engine is controlled to operate at the maximum permissible engine parameters corresponding to the current gear and current speed, thereby determining the vehicle's torque monitoring threshold at the adjusted preset gear and preset speed, until the determination of the vehicle's torque monitoring threshold at all preset gears and preset speeds is completed according to preset rules.

[0078] In this embodiment, when the vehicle's operating state does not meet the first functional safety requirement after the fault monitoring module responds to the fault reminder signal and controls the vehicle's operating state, the engine's current maximum allowable torque is reduced by a first preset adjustment amount. The engine is then re-controlled to operate with the maximum allowable engine parameters corresponding to the current gear and current speed until the vehicle's operating state meets the first functional safety requirement after the fault monitoring module responds to the fault reminder signal and controls the vehicle's operating state. The maximum allowable torque of the engine is then determined as the vehicle's current torque monitoring threshold, which further improves the rationality of the vehicle's torque monitoring threshold, thereby improving the vehicle's reliability and safety performance, while also enhancing the driver's driving experience.

[0079] Example 3

[0080] Figure 3 This is a flowchart of a method for determining a vehicle torque monitoring threshold according to Embodiment 3 of the present invention. Based on the above embodiments, this embodiment further adds a step to verify the rationality of the current torque monitoring threshold of the vehicle. Figure 3 As shown, the method includes:

[0081] S310: Obtain the current actual requirements parameters of the engine.

[0082] The current actual demand parameters of the engine may be, but are not limited to, demand parameters calculated by the accelerator pedal opening; in an exemplary embodiment, the current actual demand parameters of the engine may include the current actual demand torque or the current actual demand intake volume of the engine.

[0083] S320 controls engine operation based on current actual demand parameters and obtains the engine's actual output torque in real time.

[0084] The actual output torque of the engine can be obtained by measuring the engine's output torque.

[0085] S330: Determine whether the actual output torque of the engine is greater than the current torque monitoring threshold; if not, execute S340; if yes, execute S350.

[0086] S340, Increase the current actual demand parameter by the second preset adjustment amount, and return to execute S320 to S330.

[0087] The second preset adjustment amount can be an adjustment amount determined based on the accuracy requirements of the torque monitoring threshold. When the accuracy requirement for the torque monitoring threshold is low, the second preset adjustment amount can be set to a larger adjustment amount to reduce the number of times the current maximum allowable torque of the engine is adjusted, saving time. When the accuracy requirement for the torque monitoring threshold is high, the second preset adjustment amount can be set to a smaller adjustment amount to ensure the rationality of the torque monitoring threshold. In an exemplary embodiment, the first preset condition amount can be 10N.

[0088] S350. The difference between the current actual demand parameter and the second preset adjustment amount is determined as the set demand parameter.

[0089] The S360 controls the engine to operate according to the set parameters and obtains the vehicle's operating status in real time.

[0090] The vehicle's operating state may include, but is not limited to, unexpected acceleration.

[0091] Specifically, after determining the vehicle's current torque threshold, the engine's current actual demand parameters are acquired to control engine operation. The engine's actual output torque is also acquired in real-time to determine if it exceeds the current torque monitoring threshold. If the actual output torque is less than the threshold, the current actual demand parameters are increased by a second preset adjustment amount, and the engine's current actual demand parameters are reacquired. Engine operation is then controlled based on these parameters until the actual output torque exceeds the threshold. When the actual output torque exceeds the threshold, the difference between the current actual demand parameters and the second preset adjustment amount is defined as the set demand parameters. The engine is then controlled to operate at these set demand parameters, while the vehicle's operating status is acquired in real-time. Thus, the torque output by the engine when operating at the set demand parameters is the critical unexpected acceleration.

[0092] S370. Determine whether the vehicle's operating status meets the second functional safety requirements; if not, proceed to S380; if yes, proceed to S390.

[0093] The second functional safety requirement can be that the maximum unexpected acceleration of the vehicle is less than 2 m / s². 2 In an optional embodiment, the second functional safety requirement may further include the subjective judgment of the tester and driver, i.e., whether the tester and driver felt the acceleration impact and had difficulty reacting.

[0094] S380, reduce the current torque monitoring threshold by the third preset adjustment amount, and return to execute S310 to S370.

[0095] The third preset adjustment amount can be an adjustment amount determined based on the accuracy requirements of the torque monitoring threshold. When the accuracy requirement for the torque monitoring threshold is low, the third preset adjustment amount can be set to a larger amount to reduce the number of times the current maximum allowable torque of the engine is adjusted, saving time. When the accuracy requirement for the torque monitoring threshold is high, the third preset adjustment amount can be set to a smaller amount to ensure the rationality of the torque monitoring threshold. In an optional embodiment, the third preset adjustment amount can be equal to the first preset adjustment amount. In other embodiments, the third preset adjustment amount can also be different from the first preset adjustment amount.

[0096] S390, then the current torque monitoring threshold is determined to be the vehicle's torque monitoring threshold.

[0097] Specifically, by controlling the engine to operate with set requirements parameters and acquiring the vehicle's operating status in real time, when the vehicle's operating status does not meet the second functional safety requirement, the current torque monitoring threshold is reduced by a third preset adjustment amount, and the engine's current actual requirements parameters are reacquired. The engine is then controlled to operate according to these actual requirements parameters until the vehicle's operating status meets the second functional safety requirement when the engine is controlled to operate with the set requirements parameters. When the vehicle's operating status meets the second functional safety requirement when the engine is controlled to operate with the set requirements parameters, the current torque monitoring threshold is determined as the vehicle's torque monitoring threshold, thus verifying that the vehicle's current torque monitoring threshold is reasonable even during critical unintended acceleration.

[0098] In this embodiment, after determining the vehicle's current torque threshold, the engine's current actual demand parameters are obtained. The engine is then controlled based on these parameters, and the engine's actual output torque is acquired in real-time to determine if it exceeds the current torque monitoring threshold. When the actual output torque is less than the threshold, the current actual demand parameters are increased by a second preset adjustment amount, and the engine's current actual demand parameters are re-acquired. The engine is then controlled based on these parameters until the actual output torque exceeds the threshold. When the actual output torque exceeds the threshold, the difference between the current actual demand parameters and the second preset adjustment amount is determined as the set demand parameters. The engine is then controlled to operate at these set demand parameters. Simultaneously, the vehicle's operating status is acquired in real-time. If the vehicle's operating status does not meet the second functional safety requirement, the current torque monitoring threshold is decreased by a third preset adjustment amount, and the engine's current actual demand parameters are re-acquired. The engine is then controlled based on these parameters until the vehicle's operating status meets the second functional safety requirement when the engine is controlled to operate at the set demand parameters. When the vehicle's operating state meets the second functional safety requirement when the engine is controlled to run at the set required parameters, the current torque monitoring threshold is determined as the vehicle's torque monitoring threshold. This verifies that the vehicle's current torque monitoring threshold is reasonable even during critical unintended acceleration, further ensuring the vehicle's reliability and safety performance and improving the driver's driving experience.

[0099] Example 4

[0100] This embodiment provides a device for determining the torque monitoring threshold of a vehicle. This device can be implemented in hardware and / or software and can be integrated into a controller. Figure 4 This is a schematic diagram of the device for determining the torque monitoring threshold of a vehicle provided in Embodiment 4 of the present invention. Figure 4 As shown, the control device includes:

[0101] The control module 410 is used to control the engine to operate at the maximum permissible engine parameters corresponding to the current gear and the current speed when the current gear of the vehicle is set to a preset gear and the current speed of the vehicle's engine is set to a preset speed.

[0102] The acquisition module 420 is used to acquire the actual output torque of the engine in real time, as well as the current maximum allowable torque.

[0103] The monitoring fault reminder signal sending module 430 is used to send a monitoring fault reminder signal to the fault monitoring module when the actual output torque of the engine is greater than the current maximum allowable torque, so that the fault monitoring module responds to the monitoring fault reminder signal to control the vehicle's operating status and obtain the vehicle's operating status in real time.

[0104] The judgment module 440 is used to determine whether the vehicle's operating status meets the first functional safety requirements.

[0105] The torque monitoring threshold determination module 450 is used to determine the current maximum permissible torque as the current torque monitoring threshold of the vehicle when the first functional safety requirement is met in the vehicle's operating state.

[0106] The vehicle torque monitoring threshold determination device provided in this embodiment of the invention can execute the vehicle torque monitoring threshold determination method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. The similarities can be referred to the above description.

[0107] Example 5

[0108] This invention provides a vehicle, Figure 5 This is a structural block diagram of a vehicle provided in Embodiment 5 of the present invention, with reference to... Figure 5 As shown, the vehicle 100 includes at least an engine 10 and a controller (not shown in the figure); the controller may integrate a device for determining the torque monitoring threshold of the vehicle provided in any embodiment of the present invention, and can execute the method for determining the torque monitoring threshold of the vehicle provided in any embodiment of the present invention.

[0109] Since the vehicle provided in this embodiment of the invention includes the engine and controller described above, and the controller can integrate the torque monitoring threshold determination device of the vehicle provided in this embodiment of the invention, and can execute the torque monitoring threshold determination method of the vehicle provided in this embodiment of the invention, it can have the corresponding structure and features for executing the torque monitoring threshold determination method of the vehicle provided in this embodiment of the invention, and can achieve the beneficial effects of the torque monitoring threshold determination method of the vehicle provided in this embodiment of the invention. The similarities can be referred to the above description.

[0110] Example 6

[0111] Based on the same concept, embodiments of the present invention also provide a computer-readable storage medium storing computer instructions for causing a processor to execute and implement the control method provided in any of the above embodiments.

[0112] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0113] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for determining a torque monitoring threshold for a vehicle, used to monitor unexpected acceleration of the vehicle, characterized in that, include: When the current gear of the vehicle is set to a preset gear and the current speed of the vehicle's engine is set to a preset speed, the engine is controlled to operate with the maximum permissible engine parameters corresponding to the current gear and the current speed. The engine's actual output torque is obtained in real time, as well as the current maximum allowable torque. When the actual output torque of the engine is greater than the current maximum allowable torque, a monitoring fault reminder signal is sent to the fault monitoring module so that the fault monitoring module responds to the monitoring fault reminder signal to control the operating status of the vehicle and obtain the operating status of the vehicle in real time. Determine whether the operating status of the vehicle meets the first functional safety requirement; If so, the current maximum permissible torque is determined as the current torque monitoring threshold of the vehicle.

2. The method for determining the torque monitoring threshold of a vehicle according to claim 1, characterized in that, Also includes: If the vehicle's operating state does not meet the first functional safety requirement, the current maximum allowable torque of the engine is reduced by a first preset adjustment amount, and the process returns to the step of controlling the engine to operate with the maximum allowable engine parameters corresponding to the current gear and the current speed when the vehicle's current gear is set to a preset gear and the vehicle's current engine speed is set to a preset speed, until the vehicle's operating state meets the first functional safety requirement.

3. The method for determining the torque monitoring threshold of a vehicle according to claim 1, characterized in that, The engine parameters include the engine's required torque or the engine's required intake air volume.

4. The method for determining the torque monitoring threshold of a vehicle according to claim 1, characterized in that, Also includes: Obtain the current actual demand parameters of the engine; The engine is controlled to operate according to the current actual demand parameters, and the actual output torque of the engine is obtained in real time. Determine whether the actual output torque of the engine is greater than the current torque monitoring threshold; If so, the difference between the current actual demand parameter and the second preset adjustment amount is determined as the set demand parameter; Control the engine to operate at the set required parameters and obtain the vehicle's operating status in real time; Determine whether the operating status of the vehicle meets the second functional safety requirement; If so, then the current torque monitoring threshold is determined to be the torque monitoring threshold of the vehicle.

5. The method for determining the torque monitoring threshold of a vehicle according to claim 4, characterized in that, Also includes: If the actual output torque of the engine is less than or equal to the current torque monitoring threshold, the current actual demand parameter is increased by the second preset adjustment amount, and the process returns to the steps of controlling the engine operation according to the actual demand parameter, and obtaining the actual output torque of the engine in real time to determining whether the actual output torque of the engine is greater than the current torque monitoring threshold.

6. The method for determining the torque monitoring threshold of a vehicle according to claim 4, characterized in that, Also includes: When the vehicle's operating state does not meet the second functional safety requirement, the current torque monitoring threshold is reduced by a third preset adjustment amount, and the process returns to the steps of obtaining the engine's current actual demand parameters and determining whether the vehicle's operating state meets the second functional safety requirement.

7. The method for determining the torque monitoring threshold of a vehicle according to claim 1, characterized in that, Also includes: The preset gear and preset speed are adjusted according to preset rules, and the process returns to the step of controlling the engine to run at the maximum permissible engine parameters corresponding to the current gear and the current speed of the vehicle's engine when the current gear of the vehicle is set to the preset gear and the current speed of the vehicle's engine is set to the preset speed, until the step of determining whether the operating state of the vehicle meets the first functional safety requirement is performed.

8. A device for determining a torque monitoring threshold for a vehicle, used to monitor unexpected acceleration of the vehicle, characterized in that, include: The control module is used to control the engine to operate with the maximum permissible engine parameters corresponding to the current gear and the current speed when the current gear of the vehicle is set to a preset gear and the current speed of the engine of the vehicle is set to a preset speed. The acquisition module is used to acquire the actual output torque of the engine in real time, as well as the current maximum allowable torque; The monitoring fault reminder signal sending module is used to send a monitoring fault reminder signal to the fault monitoring module when the actual output torque of the engine is greater than the current maximum allowable torque, so that the fault monitoring module responds to the monitoring fault reminder signal to control the operating status of the vehicle and obtains the operating status of the vehicle in real time; The judgment module is used to determine whether the operating status of the vehicle meets the first functional safety requirement; The torque monitoring threshold determination module is used to determine the current maximum permissible torque as the current torque monitoring threshold of the vehicle when the vehicle's operating state meets the first functional safety requirement.

9. A vehicle, characterized in that, include: Engine and controller; The controller is used to perform the method for determining the torque monitoring threshold of the vehicle as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the method for determining the torque monitoring threshold of the vehicle as described in any one of claims 1-7.

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