Engine slow twisting function control method, device and equipment and readable storage medium

Abstract

The invention discloses an engine slow twisting function control method, device and equipment and a readable storage medium. The method comprises the steps that a gearbox gear of a vehicle is obtained; according to the gear of the gearbox or the transmission speed ratio corresponding to the gear of the gearbox, the target torque change rate limit value of the engine is determined; and engine slow twisting is conducted according to the target torque change rate limiting value. According to the method, engine slow twisting can be executed at different gears according to different target torque change rate limiting values, so that engine slow twisting can be executed at a gear with a relatively high transmission speed according to a relatively low target torque change rate limiting value, and vehicle oscillation caused by an overlarge torque change rate at a transmission system is avoided; and meanwhile, engine slow twisting can be executed with a high target torque change rate limit value at a gear with a low transmission speed, the torque of the engine can be increased as quickly as possible while the smoothness of the vehicle can be kept, and finally the torque response capacity of the vehicle and the smoothness of the torque increasing process are effectively balanced.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle torque control, and in particular to a method, device, equipment and readable storage medium for controlling an engine torque reduction function. Background Art

[0002] At present, in order to prevent the sudden change of the vehicle transmission system torque when the engine is refueling or cutting off the fuel, the common practice is to increase the engine torque slowing function to limit the engine torque change rate to prevent the sudden change of the transmission system torque from causing vibration. The slow torque function essentially reduces the torque change rate of the transmission system to avoid vibration, but the torque change rate of the transmission system is strongly related to the transmission ratio. For example, when the transmission ratio is large in low gear, the torque and change rate will be magnified. At this time, it is required to strictly limit the engine torque change. When the transmission ratio is small in high gear, the torque and change rate will not be magnified. At this time, there is basically no need to limit the engine torque change, and the restriction will lead to slow acceleration and deceleration response.

[0003] Therefore, the method of fixedly increasing the engine torque reduction in related technologies to prevent the vehicle transmission system from oscillating will affect the driving experience of the vehicle under certain working conditions. For example, if the torque reduction function is too strict, it will lead to slow acceleration and deceleration response of the entire vehicle, or if the torque reduction function is too loose, the transmission system oscillation and stalling will still be obvious. Summary of the invention

[0004] The present application provides an engine torque reduction function control method, device, equipment and readable storage medium, which can solve the technical problems existing in the above-mentioned prior art.

[0005] In a first aspect, the present application provides a method for controlling an engine torque reduction function, which adopts the following technical solution:

[0006] A method for controlling an engine torque reduction function, characterized in that the method comprises:

[0007] Get the vehicle's gearbox gear;

[0008] Determining a target torque change rate limit value of the engine according to the gearbox gear or the transmission speed ratio corresponding to the gearbox gear;

[0009] The engine torque reduction is performed according to the target torque change rate limit.

[0010] In combination with the first aspect, in one implementation, determining a target torque change rate limit of an engine according to the gearbox gear or a transmission ratio corresponding to the gearbox gear comprises the following steps:

[0011] The target torque change rate limit of the engine is determined according to the correspondence between the preset multiple transmission gears and the multiple engine torque change rates.

[0012] In combination with the first aspect, in one implementation, the same engine torque change rate corresponds to at least one transmission gear position.

[0013] In combination with the first aspect, in one implementation, the difference in transmission speed ratios between multiple transmission gears corresponding to the same torque change rate is less than a preset speed ratio difference threshold.

[0014] In combination with the first aspect, in one implementation, determining the target torque change rate limit of the engine according to the transmission speed ratio corresponding to the gearbox gear position comprises the following steps:

[0015] Obtaining a preset torque change rate threshold of the transmission system;

[0016] The target torque change rate limit of the engine is determined according to a calculation result of combining the transmission speed ratio corresponding to the gearbox gear position and the torque change rate threshold.

[0017] In combination with the first aspect, in one implementation, in determining the target torque change rate limit of the engine according to the calculation result of combining the transmission ratio corresponding to the gearbox gear position and the torque change rate threshold,

[0018] The target torque change rate limit of the engine is a ratio of the torque change rate threshold to the transmission speed ratio corresponding to the gearbox gear.

[0019] In combination with the first aspect, in one implementation, before obtaining the preset torque change rate threshold of the transmission system, the following steps are included:

[0020] Get the vehicle's operating mode;

[0021] According to the preset correspondence between the operating mode and a plurality of torque change rate thresholds, the torque change rate threshold involved in subsequent calculations is determined.

[0022] In a second aspect, the embodiment of the present application provides an engine torque reduction function control device, which adopts the following technical solution:

[0023] An engine torque reduction function control device, the engine torque reduction function control device comprising:

[0024] An acquisition module, configured to acquire a gear position of a transmission of the vehicle;

[0025] a torque change rate limiting module, configured to determine a target torque change rate limit value of the engine according to the gear position of the transmission or the transmission speed ratio corresponding to the gear position of the transmission;

[0026] The torque reduction module is configured to reduce the engine torque according to the target torque change rate limit.

[0027] In a third aspect, the embodiment of the present application provides an engine torque reduction function control device, which adopts the following technical solution:

[0028] An engine torque reduction function control device comprises a processor, a memory, and an engine torque reduction function control program stored in the memory and executable by the processor, wherein when the engine torque reduction function control program is executed by the processor, the steps of the engine torque reduction function control method as described above are implemented.

[0029] In a fourth aspect, an embodiment of the present application provides a readable storage medium, which adopts the following technical solution:

[0030] A readable storage medium stores an engine torque reduction function control program, wherein when the engine torque reduction function control program is executed by a processor, the steps of the engine torque reduction function control method as described above are implemented.

[0031] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0032] By determining the appropriate target torque change rate limit of the current engine according to the vehicle's current transmission gear or the transmission speed ratio corresponding to the transmission gear before limiting the engine's torque change rate, it is possible to perform engine detent torque at different gears with different target torque change rate limits, and then perform engine detent torque at a lower target torque change rate limit when the transmission speed ratio is higher, thereby avoiding vehicle oscillation caused by excessive torque change rate at the transmission system, and at the same time, perform engine detent torque at a higher target torque change rate limit when the transmission speed ratio is lower, thereby achieving the vehicle being able to maintain smoothness while the engine's torque can be increased as quickly as possible, ultimately achieving an effective balance between the vehicle's torque responsiveness and the smoothness of the torque increase process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a flow chart of an embodiment of a method for controlling the engine torque reduction function of the present application;

[0034] Figure 2 This is a functional module diagram of an embodiment of the engine torque reduction function control device of the present application;

[0035] Figure 3 This is a schematic diagram of the hardware structure of the engine torque reduction function control device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] At present, in order to prevent the sudden change of the vehicle transmission system torque when the engine is refueling or cutting off the fuel, the common practice is to increase the engine torque slowing function to limit the engine torque change rate to prevent the sudden change of the transmission system torque from causing vibration. The slow torque function essentially reduces the torque change rate of the transmission system to avoid vibration, but the torque change rate of the transmission system is strongly related to the transmission ratio. For example, when the transmission ratio is large in low gear, the torque and change rate will be magnified. At this time, it is required to strictly limit the engine torque change. When the transmission ratio is small in high gear, the torque and change rate will not be magnified. At this time, there is basically no need to limit the engine torque change, and the restriction will lead to slow acceleration and deceleration response.

[0038] Therefore, the method of fixedly increasing the engine torque reduction in related technologies to prevent the vehicle transmission system from oscillating will affect the driving experience of the vehicle under certain working conditions. For example, if the torque reduction function is too strict, it will lead to slow acceleration and deceleration response of the entire vehicle, or if the torque reduction function is too loose, the transmission system oscillation and stalling will still be obvious.

[0039] Based on the above problems, the present application provides an engine torque reduction function control method, device, equipment and readable storage medium. The key point of the invention is that before imposing a restriction on the engine's torque change rate, the appropriate target torque change rate limit of the current engine is determined according to the vehicle's current transmission gear or the transmission speed ratio corresponding to the transmission gear, so that the engine torque reduction can be performed with different target torque change rate limits in different gears, and then the engine torque reduction can be performed with a lower target torque change rate limit in a gear with a higher transmission speed ratio, thereby avoiding excessive torque change rate at the transmission system and causing vehicle oscillation. At the same time, the engine torque reduction can be performed with a higher target torque change rate limit in a gear with a lower transmission speed ratio, so that the vehicle can maintain smoothness while the engine torque can be increased as quickly as possible, ultimately achieving an effective balance between the vehicle's torque response capability and the smoothness of the torque increase process.

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0041] In a first aspect, an embodiment of the present application provides a method for controlling an engine torque reduction function.

[0042] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the engine slow torque control method of the present application. Figure 1 As shown, the engine slow torque function control method includes:

[0043] A method for controlling a torque reduction function of an engine, the method comprising:

[0044] S100, obtaining a gearbox gear position of the vehicle;

[0045] S200, determining a target torque change rate limit of the engine according to the gearbox gear or the transmission speed ratio corresponding to the gearbox gear;

[0046] Specifically, the EECU in the vehicle can introduce a torque-reduction module for classification according to the current gear signal, for example, according to the current specific gear or the speed ratio corresponding to each gear, to classify the corresponding different torque-reduction activation intervals and the torque change rate within the interval.

[0047] S300: Perform engine torque easing according to the target torque change rate limit.

[0048] After obtaining the target torque change rate limit corresponding to the current gearbox gear or transmission speed ratio, the engine's torque reduction function can be implemented according to the target torque change rate limit. How the engine specifically implements the torque reduction function is not the main technical solution of this application, so it will not be elaborated here. You can refer to the relevant technologies in the industry. However, after determining the target torque change rate limit through the relevant steps of this application, any form of implementing the engine's torque reduction function according to the target torque change rate limit should be deemed to be within the scope of protection of this application.

[0049] Ultimately, before limiting the engine's torque change rate, the appropriate target torque change rate limit for the current engine is determined based on the vehicle's current transmission gear or the transmission speed ratio corresponding to the transmission gear, so that the engine can be decelerated with different target torque change rate limits in different gears, and then the engine can be decelerated with a lower target torque change rate limit in a gear with a higher transmission speed ratio, thereby avoiding excessive torque change rate at the transmission system and causing vehicle oscillation. At the same time, the engine can be decelerated with a higher target torque change rate limit in a gear with a lower transmission speed ratio, so that the vehicle can maintain smoothness while the engine's torque can be increased as quickly as possible, ultimately achieving an effective balance between the vehicle's torque responsiveness and the smoothness of the torque increase process.

[0050] Further, in one embodiment, the step S200, determining the target torque change rate limit of the engine according to the gearbox gear or the transmission ratio corresponding to the gearbox gear, comprises the following steps:

[0051] S210: Determine a target torque change rate limit value of the engine according to a preset correspondence relationship between a plurality of transmission gear positions and a plurality of engine torque change rates.

[0052] For example, in some embodiments, for a commercial vehicle with 12 gears, an engine torque change rate corresponding to each gear can be preset first, that is, each gearbox gear corresponds to a different engine torque change rate. In this way, after the current gearbox gear is clear, the corresponding engine torque change rate can be used as the target torque change rate limit of the engine. In addition, in some other embodiments, some gears with a small transmission ratio among the 12 gears can be regarded as gears of the same level, and the same engine torque change rate is corresponding to the same gears of the same level, and the engine torque change rate corresponding to gears of different levels is different, and as the gear level gradually increases or decreases, the engine torque change rate will also change accordingly.

[0053] Furthermore, in one embodiment, the same engine torque change rate corresponds to at least one transmission gear position.

[0054] Specifically, the difference in transmission speed ratios between the various transmission gears corresponding to the same torque change rate is less than a preset speed ratio difference threshold.

[0055] This arrangement enables the same engine torque change rate to be corresponded to some gears with small transmission ratio differences. At this time, due to the small transmission ratio difference, when these gears use the same engine torque change rate for slow torque, the corresponding transmission torque change rate in the transmission system is not much different, making the user experience very close or basically the same. Ultimately, the control process of multi-gear vehicles in actual driving is effectively simplified, which is easy to implement and the design cost can be further guaranteed.

[0056] Furthermore, in some other embodiments, different from the above embodiments, the step S200, determining the target torque change rate limit of the engine according to the transmission speed ratio corresponding to the gearbox gear position, includes the following steps:

[0057] S210, obtaining a preset torque change rate threshold of the transmission system;

[0058] S220: Determine a target torque change rate limit of the engine according to a calculation result of combining the transmission speed ratio corresponding to the gearbox gear position and the torque change rate threshold.

[0059] Specifically, the torque change rate threshold of the transmission system is a relevant parameter calibrated in advance for the vehicle. When the torque change rate threshold is within the torque change rate threshold, the vehicle torque has good smoothness during the change process. When the torque change rate of the transmission system is greater than the torque change rate threshold, the vehicle torque will have obvious jerkiness during the change process, affecting the user's driving experience. Therefore, by combining the transmission ratio corresponding to the current gearbox gear position with the torque change rate threshold, the target torque change rate limit that needs to be applied to the engine can be obtained, so that the engine's torque change rate can be satisfied to always be less than the torque change rate threshold at the transmission system.

[0060] This setting can achieve gear adaptation in design. For example, the torque change of the vehicle's transmission system causes oscillation, so it needs to be decelerated. The torque change rate is related to the speed ratio of each gear of the gearbox. Therefore, the torque change rate threshold of the transmission system can be set according to the principle of oscillation generation. According to the gearbox ratio of the current gear, the torque change rate limit of the torque source - the engine - can be adaptively calculated.

[0061] Further, in some embodiments, the target torque change rate limit of the engine is determined based on the calculation result of the combination of the transmission ratio corresponding to the gearbox gear position and the torque change rate threshold.

[0062] The target torque change rate limit of the engine is a ratio of the torque change rate threshold to the transmission speed ratio corresponding to the gearbox gear.

[0063] Furthermore, in some embodiments, before the step S210 of obtaining the preset torque change rate threshold of the transmission system, the following steps are included:

[0064] S201, obtaining the operation mode of the vehicle;

[0065] S202: Determine a torque change rate threshold involved in subsequent calculations according to a preset correspondence between the operating mode and a plurality of torque change rate thresholds.

[0066] For vehicles, since users may have different torque response requirements, vehicles often have different operating modes during operation, such as an operating mode that can respond to torque faster, or a smoother and more economical operating mode, etc. Therefore, in different operating modes, the torque change rate threshold needs to be adjusted to meet the different torque response requirements of users.

[0067] Therefore, in this embodiment, by matching the operation mode with a plurality of torque change rate thresholds in advance, when entering a certain operation mode, the corresponding torque change rate threshold is used to perform the subsequent engine detent function.

[0068] In a second aspect, an embodiment of the present application also provides an engine torque reduction function control device.

[0069] In one embodiment, referring to Figure 2 , Figure 2 This is a functional module diagram of an embodiment of the engine torque reduction control device of the present application. Figure 2 As shown, the engine slow torque function control device includes:

[0070] An acquisition module, configured to acquire a gear position of a transmission of the vehicle;

[0071] a torque change rate limiting module, configured to determine a target torque change rate limit value of the engine according to the gear position of the transmission or the transmission speed ratio corresponding to the gear position of the transmission;

[0072] The torque reduction module is configured to reduce the engine torque according to the target torque change rate limit.

[0073] Further, in one embodiment, the torque change rate limiting module of the engine torque reduction function control device is used to:

[0074] When determining the target torque change rate limit of the engine according to the gearbox gear or the transmission speed ratio corresponding to the gearbox gear, the following steps are included:

[0075] The target torque change rate limit of the engine is determined according to the correspondence between the preset multiple transmission gears and the multiple engine torque change rates.

[0076] Further, in one embodiment, the torque change rate limiting module of the engine torque reduction function control device is used to:

[0077] The same engine torque change rate corresponds to at least one gearbox gear.

[0078] Further, in one embodiment, the torque change rate limiting module of the engine torque reduction function control device is used to:

[0079] The difference in transmission speed ratios between the plurality of transmission gears corresponding to the same torque change rate is less than a preset speed ratio difference threshold.

[0080] Further, in one embodiment, the torque change rate limiting module of the engine torque reduction function control device is used to:

[0081] When determining the target torque change rate limit of the engine according to the transmission speed ratio corresponding to the gearbox gear position, the following steps are included:

[0082] Obtaining a preset torque change rate threshold of the transmission system;

[0083] The target torque change rate limit of the engine is determined according to a calculation result of combining the transmission speed ratio corresponding to the gearbox gear position and the torque change rate threshold.

[0084] Further, in one embodiment, the torque change rate limiting module of the engine torque reduction function control device is used to:

[0085] In determining the target torque change rate limit of the engine according to the calculation result of combining the transmission speed ratio corresponding to the gearbox gear position and the torque change rate threshold,

[0086] The target torque change rate limit of the engine is a ratio of the torque change rate threshold to the transmission speed ratio corresponding to the gearbox gear.

[0087] Further, in one embodiment, the torque change rate limiting module of the engine torque reduction function control device is used to:

[0088] Before obtaining the preset torque change rate threshold of the transmission system, the following steps are included:

[0089] Get the vehicle's operating mode;

[0090] According to the preset correspondence between the operating mode and a plurality of torque change rate thresholds, the torque change rate threshold involved in subsequent calculations is determined.

[0091] Among them, the functional implementation of each module in the above-mentioned engine torque reduction function control device corresponds to the various steps in the above-mentioned engine torque reduction function control method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0092] Ultimately, before limiting the engine's torque change rate, the appropriate target torque change rate limit for the current engine is determined based on the vehicle's current transmission gear or the transmission speed ratio corresponding to the transmission gear, so that the engine can be decelerated with different target torque change rate limits in different gears, and then the engine can be decelerated with a lower target torque change rate limit in a gear with a higher transmission speed ratio, thereby avoiding excessive torque change rate at the transmission system and causing vehicle oscillation. At the same time, the engine can be decelerated with a higher target torque change rate limit in a gear with a lower transmission speed ratio, so that the vehicle can maintain smoothness while the engine's torque can be increased as quickly as possible, ultimately achieving an effective balance between the vehicle's torque responsiveness and the smoothness of the torque increase process.

[0093] In a third aspect, an embodiment of the present application provides an engine torque reduction function control device, which may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0094] Reference Figure 3 , Figure 3 Schematic diagram of the hardware structure of the engine slow torque function control device involved in the embodiment of the present application. In the embodiment of the present application, the engine slow torque function control device may include a processor, a memory, a communication interface and a communication bus.

[0095] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0096] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the engine torque reduction function control device, and the interface used to realize the interconnection of the engine torque reduction function control device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0097] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0098] The processor may be a general-purpose processor, which may call the engine torque reduction function control program stored in the memory and execute the engine torque reduction function control method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the engine torque reduction function control program is called may refer to the various embodiments of the engine torque reduction function control method of the present application, which will not be described in detail here.

[0099] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0100] In a fourth aspect, an embodiment of the present application also provides a readable storage medium.

[0101] The readable storage medium of the present application stores an engine torque reduction function control program, wherein when the engine torque reduction function control program is executed by a processor, the steps of the engine torque reduction function control method as described above are implemented.

[0102] Among them, the method implemented when the engine torque reduction function control program is executed can refer to the various embodiments of the engine torque reduction function control method of the present application, and will not be repeated here.

[0103] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0104] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0105] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0106] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0107] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0108] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0109] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for controlling an engine torque reduction function, characterized in that: The method comprises: Get the vehicle's gearbox gear; Determining a target torque change rate limit value of the engine according to the gearbox gear or the transmission speed ratio corresponding to the gearbox gear; The engine torque reduction is performed according to the target torque change rate limit.

2. The engine torque reduction function control method according to claim 1, characterized in that: Determining a target torque change rate limit of an engine according to the gearbox gear or the transmission speed ratio corresponding to the gearbox gear, comprises the following steps: The target torque change rate limit of the engine is determined based on the correspondence between the preset multiple transmission gears and the multiple engine torque change rates.

3. The engine torque reduction function control method according to claim 2, characterized in that: The same engine torque change rate corresponds to at least one gearbox gear.

4. The engine torque reduction function control method according to claim 3, characterized in that: The difference in transmission speed ratios between the plurality of transmission gears corresponding to the same torque change rate is less than a preset speed ratio difference threshold.

5. The engine slow torque function control method according to claim 1, characterized in that: Determining the target torque change rate limit of the engine according to the transmission speed ratio corresponding to the gearbox gear position comprises the following steps: Obtaining a preset torque change rate threshold of the transmission system; The target torque change rate limit of the engine is determined according to a calculation result of combining the transmission speed ratio corresponding to the gearbox gear position and the torque change rate threshold.

6. The engine torque reduction function control method according to claim 5, characterized in that: The calculation result based on the transmission ratio corresponding to the gearbox gear position and the torque change rate threshold value is: In determining the target torque change rate limit of the engine, The target torque change rate limit of the engine is a ratio of the torque change rate threshold to the transmission speed ratio corresponding to the gearbox gear.

7. The engine torque reduction function control method according to claim 5, characterized in that: Before obtaining the preset torque change rate threshold of the transmission system, the following steps are included: Get the vehicle's operating mode; According to the preset correspondence between the operating mode and a plurality of torque change rate thresholds, the torque change rate threshold involved in subsequent calculations is determined.

8. An engine torque reduction function control device, characterized in that: The engine slow torque function control device comprises: An acquisition module, configured to acquire a gear position of a transmission of the vehicle; a torque change rate limiting module, configured to determine a target torque change rate limit value of the engine according to the gear position of the transmission or the transmission speed ratio corresponding to the gear position of the transmission; The torque reduction module is configured to reduce the engine torque according to the target torque change rate limit.

9. An engine torque reduction function control device, characterized in that: The engine torque reduction function control device includes a processor, a memory, and an engine torque reduction function control program stored in the memory and executable by the processor, wherein when the engine torque reduction function control program is executed by the processor, the steps of the engine torque reduction function control method as described in any one of claims 1 to 7 are implemented.

10. A readable storage medium, characterized in that: The readable storage medium stores an engine torque reduction function control program, wherein when the engine torque reduction function control program is executed by a processor, the steps of the engine torque reduction function control method according to any one of claims 1 to 7 are implemented.

Images