Engine Torque Control Method, Electronic Device, and Vehicle

Abstract

An engine torque control method, an electronic device and a vehicle provided by the present application obtain the driving mode of the vehicle and the differential lock locking state, and determine whether the first preset condition is satisfied. If the first preset condition is satisfied, it indicates that the current driving mode and differential lock locking state of the vehicle meet the torque limit requirement. On the premise of satisfying the first preset condition, the driving state information of the vehicle is obtained, and it is determined whether the second preset condition is satisfied. If it is satisfied, it indicates that the current driving state of the vehicle requires torque limitation, and a torque limit request is sent to control the output torque of the engine. The engine torque control method of the present application can protect the vehicle's transmission system when the vehicle has a differential lock locking state and the engine torque output is large, avoid damage to transmission components caused by violent driving behavior, improve the durability and safety of vehicle transmission components, and protect the lives of the occupants in the vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and particularly to an engine torque control method, an electronic device, and a vehicle. Background Art

[0002] When the vehicle is in the low-speed four-wheel drive 4L mode, the transfer case will amplify the output torque of the transmission so that the front and rear axles can obtain a greater input torque, improving the power performance of the vehicle to enhance the response effect to unpaved roads and complex terrains. However, when the vehicle is in the 4L mode and the differential lock is locked, the increased torque input is likely to damage the vehicle's transmission system. For example, the half shafts are prone to breakage or early fatigue failure. In particular, when the vehicle is turning, it is more likely to cause damage to the transmission system, which may lead to vehicle damage and endanger the lives of the occupants. Summary of the Invention

[0003] In view of this, the purpose of the present application is to provide an engine torque control method, an electronic device, and a vehicle to solve the problem of damage to the vehicle's transmission system when the vehicle is in the 4L mode and the differential lock is locked.

[0004] Based on the above purpose, the first aspect of the present application provides an engine torque control method, including:

[0005] Obtaining the driving mode of the vehicle and the differential lock locking state;

[0006] In response to the driving mode and the differential lock locking state satisfying a first preset condition, obtaining the driving state information of the vehicle, where the first preset condition is used to represent the driving mode and the differential lock locking state of the vehicle that requires torque limitation;

[0007] In response to the driving state information satisfying a second preset condition, sending a torque limitation request, where the torque limitation request is used to control the output torque of the engine, and the second preset condition is used to represent the driving state of the vehicle that requires torque limitation.

[0008] Optionally, the driving mode includes the low-speed four-wheel drive mode, and the differential lock locking state includes rear axle lock, front axle lock, and rear axle lock.

[0009] The step of "in response to the driving mode and the differential lock locking state satisfying a first preset condition" includes:

[0010] In response to the driving mode being the low-speed four-wheel drive mode and the differential lock locking state being the rear axle lock, satisfying the first preset condition; or,

[0011] In response to the driving mode being the low-speed four-wheel drive mode and the differential lock locking state being the front axle lock and the rear axle lock, the first preset condition is satisfied.

[0012] Optionally, the driving state information at least includes the steering wheel angle of the vehicle, the gear information, the engine speed change rate, and the throttle pedal opening degree.

[0013] The responding to the driving state information satisfying the second preset condition includes:

[0014] In response to the gear information being the forward gear, the throttle pedal opening degree being greater than the preset opening degree threshold and the engine speed change rate remaining unchanged or increasing, the second preset condition is satisfied; or,

[0015] In response to the gear information being the reverse gear and the steering wheel angle being greater than the preset angle threshold, the second preset condition is satisfied.

[0016] Optionally, it further includes:

[0017] Obtain the all-terrain information;

[0018] Based on at least one of the all-terrain information, the driving mode, the differential lock locking state, and the driving state information, send a request for displaying torque limit information to display the torque limit prompt information of the vehicle to the user.

[0019] The second aspect of the present application provides an engine torque control method, including:

[0020] In response to receiving a torque limit request, select a corresponding preset torque limit value according to the driving state information of the vehicle in the torque limit request;

[0021] Control the output torque of the engine based on the preset torque limit value.

[0022] Optionally, it further includes:

[0023] In response to receiving the torque limit request, select a corresponding preset torque limit value and a preset clamping force according to the driving state information in the torque limit request;

[0024] Control the output torque of the engine based on the preset torque limit value and control the braking force of the caliper based on the preset clamping force.

[0025] Optionally, the driving state information includes the steering wheel angle, and the selecting a corresponding preset torque limit value according to the driving state information in the torque limit request includes:

[0026] Select a corresponding preset torque limit value according to the correspondence between the steering wheel angle and the preset torque limit value, where the steering wheel angle is negatively correlated with the preset torque limit value.

[0027] Optionally, the driving state information includes the steering wheel angle. The step of selecting a corresponding preset clamping force according to the driving state information in the torque limit request includes:

[0028] Select a corresponding preset clamping force according to the correspondence between the steering wheel angle and the preset clamping force, where the steering wheel angle is negatively correlated with the preset clamping force.

[0029] A third aspect of the present application further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable by the processor. When the processor executes the computer program, the method described in the first aspect or the second aspect is implemented.

[0030] A fourth aspect of the present application further provides a vehicle, including the electronic device described in the third aspect.

[0031] As can be seen from the above, an engine torque control method, an electronic device, and a vehicle provided by the present application obtain the driving mode of the vehicle and the differential lock locking state, and determine whether the first preset condition is satisfied. If the first preset condition is satisfied, it indicates that the current driving mode and differential lock locking state of the vehicle meet the torque limit requirements. On the premise of satisfying the first preset condition, obtain the driving state information of the vehicle, determine whether the second preset condition is satisfied. If satisfied, it indicates that the current driving state of the vehicle requires torque limiting, and send a torque limit request to control the output torque of the engine. The engine torque control method of the present application can protect the vehicle's transmission system when the vehicle has a differential lock locking state and the engine torque output is large, avoid damage to transmission components caused by violent driving behaviors, improve the durability and safety of vehicle transmission components, and protect the lives of vehicle occupants. Description of the Drawings

[0032] To more clearly illustrate the technical solutions in the present application or related technologies, the following will briefly introduce the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a flowchart of the engine torque control method according to an embodiment of the present application;

[0034] Figure 2 It is a flowchart of the engine torque control method according to another embodiment of the present application;

[0035] Figure 3 Schematic flowchart of the engine torque control method according to another embodiment of the present application;

[0036] Figure 4 Schematic structural diagram of the engine torque control device according to an embodiment of the present application;

[0037] Figure 5 Schematic structural diagram of the engine torque control device according to another embodiment of the present application;

[0038] Figure 6 Schematic diagram of the hardware structure of the electronic device according to an embodiment of the present application. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0040] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the ordinary meanings understood by those of ordinary skill in the field to which the present application belongs. The "first", "second" and similar terms used in the embodiments of the present application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or items appearing before this term cover the elements or items listed after this term and their equivalents, without excluding other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0041] The transfer case is an important component of the vehicle power system. Its main function is to distribute the power provided by the power system to the front and rear drive shafts, and transfer the torque to the 4 wheels through the main reducer and drive shafts, so as to achieve four-wheel drive. The transfer case usually includes a high-speed drive mode and a low-speed drive mode (hereinafter referred to as the 4L mode). Among them, the high-speed drive mode includes the four-wheel drive mode (hereinafter referred to as the 4WD mode), the high-speed two-wheel drive mode (2H mode) and the high-speed four-wheel drive mode (4H mode). When the vehicle is driving on a relatively smooth road condition, the transfer case can be in the high-speed drive mode, so that the vehicle has better fuel economy. When the transfer case is in the 4L mode, the transfer case will amplify the output torque of the transmission to enable the front and rear axles to obtain a greater input torque, improve the power performance of the vehicle, and enhance the adaptability to unpaved roads and complex terrain road conditions. Therefore, by switching the transfer case mode, the power performance and fuel economy of the vehicle under different road conditions can be improved.

[0042] At present, a differential lock is configured in some vehicles that meet off-road requirements. The function of the differential lock is that when one wheel slips, the differential lock uses the ECU (Electronic Control Unit) to control the differential and the half shaft to lock into one body, so that the differential loses its differential function, and transfers the power to the effective wheel side to help the vehicle get out of trouble quickly. However, when the vehicle is in deep off-road conditions such as rock wading, locking the differential lock in the 4L mode will cause certain damage to the vehicle's transmission system. For example, the half shaft may break or experience early fatigue failure. When the engine output power remains unchanged, when the vehicle turns while the differential lock is locked in the 4L mode, the engine output torque further increases, which is more likely to damage the transmission system. The greater the steering angle during turning, the higher the damage probability.

[0043] At present, there is a lack of a torque limit strategy for vehicles in the 4L mode in the prior art. Blind driving by users in complex road conditions will cause vehicle damage, seriously affecting the vehicle's passability and the user's driving experience, and even endangering the user's life safety.

[0044] In view of this, the present application provides an engine torque control method, an electronic device and a vehicle. By obtaining the driving mode of the vehicle and the differential lock locking state, it is determined whether the first preset condition is satisfied. If the first preset condition is satisfied, it indicates that the current driving mode and differential lock locking state of the vehicle meet the torque limit requirement. On the premise of satisfying the first preset condition, the driving state information of the vehicle is obtained, and it is determined whether the second preset condition is satisfied. If it is satisfied, it indicates that the current driving state of the vehicle requires torque limitation, and a torque limit request is sent to control the output torque of the engine. The engine torque control method of the present application can protect the vehicle's transmission system when the vehicle has a differential lock locking state and a large engine torque output, avoid damage to transmission components caused by violent driving behaviors, improve the durability and safety of vehicle transmission components, and protect the lives of vehicle occupants.

[0045] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0046] The present application provides an engine torque control method, refer to Figure 1 , including the following steps:

[0047] Step 102, obtain the driving mode of the vehicle and the differential lock locking state.

[0048] Specifically, the differential lock controller in the vehicle is communicatively connected to the transfer case controller, the automatic transmission controller (TCU, Transmission Control Unit), the engine controller (ECM, Engine Control Module), and the all-terrain system, etc. The differential lock controller obtains the driving mode of the vehicle through the transfer case controller. The driving modes include 4WD mode, 2H mode, 4H mode, and 4L mode. The differential lock includes a front axle lock and a rear axle lock. The differential lock controller obtains the switch key states of the front axle lock and the rear axle lock respectively to judge the differential lock state. When the switch key state is off, the differential lock is in the locked state.

[0049] Step 104, in response to the driving mode and the differential lock locking state satisfying the first preset condition, obtain the driving state information of the vehicle, where the first preset condition is used to represent the driving mode and the differential lock locking state of the vehicle that require torque limitation.

[0050] After obtaining the driving mode and the differential lock engagement state, it is determined whether torque limitation needs to be applied to the vehicle by judgment. If the current driving condition of the vehicle is complex, the engine output torque increases, and there is a probability of damaging the vehicle's transmission system during driving, then torque limitation needs to be applied to the vehicle to ensure the safety of the vehicle and the user. In this embodiment, a first preset condition is pre-established according to the actual driving situation. When the driving mode and the differential lock engagement state meet the first preset condition, the necessity of applying torque limitation to the vehicle is further judged based on the driving state information of the vehicle. If the driving mode and the differential lock engagement state do not meet the first preset condition, there is no need to obtain the driving state information, reducing unnecessary signal transmission and avoiding occupying the signal transmission channel.

[0051] Step 106, in response to the driving state information meeting the second preset condition, send a torque limitation request for controlling the engine output torque, where the second preset condition is used to characterize the driving state of the vehicle that requires torque limitation.

[0052] On the premise that the driving mode and the differential lock engagement state meet the first preset condition, obtain the driving state information of the vehicle and judge it. If the driving state information meets the second preset condition, it indicates that the engine output torque is relatively large at this time, and torque limitation needs to be applied to the vehicle to protect the vehicle's transmission system. The differential lock controller sends a torque limitation request to the vehicle's Electronic Stability Program (ESP). After receiving the torque limitation request, the ESP sends a torque limitation command according to the torque limitation request to control the engine output torque. The second preset condition is pre-established according to the actual driving situation. If the driving state information does not meet the second preset condition, there is no need to send a torque limitation request, that is, torque limitation is not applied to the vehicle. When the power is sufficient, the vehicle can provide a certain degree of driving pleasure for the user and enhance the user experience during deep off-road driving.

[0053] Based on the above steps 102 to 106, by obtaining the driving mode of the vehicle and the differential lock engagement state, it is determined whether the first preset condition is satisfied. If the first preset condition is satisfied, it indicates that the current driving mode and differential lock engagement state of the vehicle meet the torque limit requirement. On the premise of satisfying the first preset condition, the driving state information of the vehicle is obtained, and it is determined whether the second preset condition is satisfied. If it is satisfied, it indicates that the current driving state of the vehicle requires torque limitation, and a torque limit request is sent to control the output torque of the engine. The engine torque control method of this embodiment can protect the vehicle's transmission system when the vehicle has a differential lock engaged state and a large engine torque output, avoid damage to transmission components caused by violent driving behavior, improve the durability and safety of the vehicle's transmission components, protect the lives of the people in the vehicle. At the same time, when torque limitation is not required, it can provide the user with the driving pleasure during deep off-road driving and enhance the user experience.

[0054] In some embodiments, the driving mode includes the low-speed four-wheel drive mode, and the differential lock engagement state includes rear axle lock, front axle lock and rear axle lock.

[0055] The response to the driving mode and the differential lock engagement state satisfying the first preset condition includes:

[0056] Responding to the driving mode being the low-speed four-wheel drive mode and the differential lock engagement state being the rear axle lock, the first preset condition is satisfied; or,

[0057] Responding to the driving mode being the low-speed four-wheel drive mode and the differential lock engagement state being the front axle lock and rear axle lock, the first preset condition is satisfied.

[0058] Specifically, the differential lock includes a front axle lock and a rear axle lock. The differential lock engagement state includes rear axle lock, front axle lock and rear axle lock. The front axle lock can only occur on the basis of the rear axle lock. Therefore, the differential lock engagement state only includes the above two cases.

[0059] It should be noted that when the vehicle is driving on unpaved roads and complex terrains, the user can switch the vehicle driving mode to the 4L mode through the transfer case controller. In the 4L mode, the output torque of the vehicle increases, and the corresponding power increases, which is beneficial to the vehicle driving on complex terrains to prevent the vehicle from getting stuck.

[0060] When the vehicle meets the first preset condition, there are two cases. One is that the driving mode of the vehicle is the low-speed four-wheel drive mode and the differential lock locking state is the rear axle locked. The other is that the driving mode of the vehicle is the low-speed four-wheel drive mode and the differential lock locking state is the front axle locked and the rear axle locked. In the latter case, not only the rear axle is locked through the differential lock controller, but also the front axle needs to be locked, indicating that the road conditions for vehicle driving are more complex. However, in the latter case, the damage to the vehicle's transmission system is greater. When limiting the engine output torque, in the 4L mode + front axle locked and rear axle locked case, the limit on the engine output torque is greater, that is, the engine output torque is smaller.

[0061] In some embodiments, the driving state information at least includes the steering wheel angle of the vehicle, the gear position information, the engine speed change rate, and the throttle pedal opening.

[0062] The response to the driving state information meeting the second preset condition includes:

[0063] In response to the gear position information being the forward gear position, the throttle pedal opening being greater than the preset opening threshold and the engine speed change rate remaining unchanged or increasing, the second preset condition is met; or,

[0064] In response to the gear position information being the reverse gear position and the steering wheel angle being greater than the preset angle threshold, the second preset condition is met.

[0065] Specifically, the steering wheel angle is obtained through the steering system, the gear position information is obtained through the TCU, and the engine speed change rate and the throttle pedal opening are both obtained through the ECM. Meeting the second preset condition includes two cases. In one case, when the gear position information of the vehicle is in the forward gear, it is necessary to combine the throttle pedal opening and the engine speed change rate to determine whether the second preset condition is met. In this embodiment, the preset opening threshold is 20°. If the throttle pedal opening is less than 20° and the engine speed change rate decreases or the throttle pedal opening change rate decreases, it indicates that the driver has no intention of accelerating, the power output of the vehicle decreases, and the harm to the transmission system is small. At this time, there is no need to limit the torque of the vehicle. If the throttle pedal opening is greater than 20° and the engine speed change rate remains unchanged or increases, or the throttle pedal opening change rate remains unchanged or increases, it indicates that the driver has an intention of accelerating. If at the same time the engine speed change rate remains unchanged or continues to increase, the vehicle speed will increase correspondingly, the power output of the vehicle increases, and there is a probability of damaging the transmission system. At this time, it is necessary to limit the torque of the vehicle, that is, the driving state information meets the second preset condition at this time. In the other case, when the gear position information of the vehicle is in the reverse gear, the steering wheel angle is combined to determine whether the second preset condition is met. In this embodiment, the preset angle threshold is 180°. When the steering wheel angle is less than the preset angle threshold, the torque of the vehicle is not limited to ensure that sufficient power can be provided for the vehicle to get out of trouble under complex road conditions. When the steering wheel angle is greater than the preset angle threshold, to prevent damage to the transmission system of the vehicle when turning, it is necessary to limit the torque of the vehicle at this time, that is, the driving state information meets the second preset condition at this time.

[0066] It should be noted that when the gear position information of the vehicle is in the reverse gear, the load on the front axle increases and the bearing capacity of the front axle is small. Therefore, when limiting the torque of the vehicle in this case, compared with when the gear position information is in the forward gear, the limit on the engine output torque increases, that is, the engine outputs a smaller torque to protect the transmission system of the vehicle.

[0067] In some embodiments, the engine torque control method further includes:

[0068] Obtain the all-terrain information;

[0069] Based on at least one of the all-terrain information, the driving mode, the differential lock locking state, and the driving state information, send a request for displaying torque limit information to show the torque limit prompt information of the vehicle to the user.

[0070] Specifically, the all-terrain information in this embodiment is collected and analyzed by the all-terrain system and sent to the differential lock controller. The all-terrain information is the relevant information obtained by observing and detecting the entire terrain. Among them, the all-terrain includes various terrains, such as snow, swamp, desert, rock, wading terrain, etc. The driving modes include 4WD mode, 2H mode, 4H mode, and 4L mode. The differential lock locking state includes rear axle locking, front axle locking, and rear axle locking. The driving state information includes the steering wheel angle of the vehicle, gear information, engine speed change rate, and accelerator pedal opening, etc.

[0071] Exemplarily, when it is detected that the terrain where the vehicle is currently driving is rock or wading mode, the torque limit of the vehicle is cancelled, that is, there is no power output limit for the vehicle, providing sufficient power for the vehicle to help the vehicle pass through the complex road conditions smoothly. At the same time, a torque limit information display request can be sent to the vehicle computer. After receiving the torque limit information display request, the vehicle computer displays it on the vehicle computer according to the specific content included in the request. For example, it shows prompt information such as "There is no torque limit strategy for rock or wading mode, please drive carefully" to the user. This prompt information can also be shown to the user in the form of voice broadcast, facilitating the user to receive this prompt information in a timely manner.

[0072] Exemplarily, when it is detected that the driving mode of the vehicle has changed or there is a differential lock locking situation, a torque limit information display request can be sent to the vehicle computer. After receiving the torque limit information display request, the vehicle computer displays it on the vehicle computer according to the specific content included in the request. For example, it shows to the user "There is no torque limit strategy for 4WD mode, 2H mode, and 4H mode. To ensure the vehicle's driveline and driving safety, the vehicle will execute the torque limit strategy according to the differential lock locking state and the steering wheel angle in 4L mode. Please drive carefully", etc.

[0073] It should be noted that when the torque limit strategy needs to be executed, while showing the torque limit prompt information to the user on the display interface of the vehicle computer, virtual buttons for determining whether to execute or not execute the torque limit strategy can also be displayed on the display interface, allowing the user to independently choose whether to execute the torque limit strategy for the vehicle. If the user has relatively rich off-road experience and can handle driving in complex road conditions, they can choose not to execute the torque limit strategy to enhance the user's off-road experience. If the user lacks driving experience in dealing with complex road conditions, they can choose to execute the torque limit strategy to prevent damage to the vehicle and ensure the user's life safety.

[0074] It should be noted that in the 4L mode, if the current terrain is rocky or wading, the vehicle torque limit strategy is not implemented for the vehicle. In rocky or wading terrains, if torque is limited for the vehicle, it may cause the vehicle to be unable to pass through the road surface smoothly and get stuck. Therefore, torque is not limited for the vehicle in these two terrains to ensure that the engine outputs sufficient power to help the vehicle get out of trouble. In other terrain conditions of the 4L mode, the corresponding torque limit strategy is implemented for the vehicle to avoid damage to the vehicle's transmission system.

[0075] By displaying the torque limit prompt information to the user, the vehicle's torque limit strategy can be informed to the user in advance, enabling the user to select appropriate driving behaviors in different situations and ensuring driving safety for the user under different road conditions.

[0076] This application also provides another engine torque control method. Refer to Figure 2 , including the following steps:

[0077] Step 202: In response to receiving a torque limit request, select a corresponding preset torque limit value according to the driving state information of the vehicle in the torque limit request.

[0078] Specifically, after the differential lock controller issues a torque limit request, the vehicle ESP receives the torque limit request, parses the driving state information in the torque limit request, and determines the associated preset torque limit value according to the driving state information.

[0079] It should be noted that the preset torque limit value is set in advance according to actual experience. In addition, a database can be pre-constructed to store the transmission system parameters of different vehicle models in the database, set corresponding torque limit values according to different transmission system parameters, and assign unique codes to the torque limit values corresponding to different transmission systems. When flashing the vehicle software, the corresponding torque limit value can be automatically identified according to the transmission system type of the current vehicle and burned into the vehicle software, eliminating the need to reset the torque limit value each time and improving the reuse rate of the torque limit value code.

[0080] After the vehicle is flashed, each driving state information uniquely corresponds to a preset torque limit value. When the vehicle ESP receives a torque limit request, it can query the preset torque limit value that matches the driving state information in the torque limit request.

[0081] Step 204: Control the output torque of the engine based on the preset torque limit value.

[0082] When the ESP queries the preset torque limit value, it sends the preset torque limit value to the vehicle ECM, and adjusts the output torque of the engine through the ECM so that the output torque of the engine does not exceed the preset torque limit value, thereby restricting the output torque of the engine.

[0083] In some embodiments, refer to Figure 3, the engine torque control method further includes the following steps:

[0084] Step 302, in response to receiving the torque limit request, select corresponding preset torque limit values and preset clamping forces according to the driving state information in the torque limit request.

[0085] Specifically, after the differential lock controller issues a torque limit request, the vehicle ESP receives the torque limit request, analyzes the driving state information in the torque limit request, and determines the associated preset torque limit values and preset clamping forces according to the driving state information.

[0086] The preset torque limit value is used to limit the output torque of the engine, and the preset clamping force is used to limit the clamping force of the wheel calipers. Through the auxiliary limitation of the caliper clamping force, the driving safety of the vehicle under complex road conditions can be further ensured.

[0087] It should be noted that, similar to the foregoing embodiments, the preset clamping force is also set in advance according to actual experience. Similarly, a database is constructed, and the transmission system parameters of different vehicle models are stored in the database. Corresponding clamping forces are set according to different transmission system parameters, and unique codes are assigned to the clamping forces corresponding to different transmission systems. When flashing the vehicle software, the corresponding clamping force can be automatically identified according to the transmission system type of the current vehicle and burned into the vehicle software, without having to reset the clamping force each time, improving the reuse rate of the clamping force codes.

[0088] Step 304, control the output torque of the engine based on the preset torque limit value, and control the braking force of the calipers based on the preset clamping force.

[0089] When the ESP queries the preset torque limit value and the preset clamping force, it sends the preset torque limit value to the vehicle ECM, and adjusts the output torque of the engine through the ECM so that the output torque of the engine shall not be higher than the preset torque limit value, thereby limiting the output torque of the engine. The preset clamping force is sent to the traction control system (TCS), and the TCS controls the calipers to apply a clamping force to the wheels to assist in vehicle braking. By controlling the engine output torque in combination with caliper braking, the braking force and the output torque are jointly controlled to further ensure the driving safety of the vehicle under complex road conditions.

[0090] In some embodiments, the driving state information includes the steering wheel angle, and the selecting of the corresponding preset torque limit value according to the driving state information in the torque limit request includes:

[0091] Select the corresponding preset torque limit value according to the correspondence between the steering wheel angle and the preset torque limit value, where the steering wheel angle and the preset torque limit value are negatively correlated.

[0092] When setting the preset torque limit value, different torque limit values need to be set according to the angular partition of the steering wheel angle. In the 4L mode, the larger the steering wheel angle, the greater the probability of damaging the transmission system. Therefore, it is necessary to limit the output torque of the engine. The greater the limit, the smaller the torque limit value, and the torque limit value is negatively correlated with the steering wheel angle. In this embodiment, the steering wheel angle is divided into 6 angular intervals, specifically: ① X < 90°; ② 90° < X ≤ 180°; ③ 180° < X ≤ 270°; ④ 270° < X ≤ 360°; ⑤ 360° < X ≤ 450°; ⑥ 450° < X, where X represents the steering wheel angle. Different torque limit values are set within the above 6 angular intervals. Exemplarily, the torque limit values are specifically: ① X < 90°, Y = 1136 Nm; ② 90° < X ≤ 180°, Y = 1050 Nm; ③ 180° < X ≤ 270°, Y = 900 Nm; ④ 270° < X ≤ 360°, Y = 800 Nm; ⑤ 360° < X ≤ 450°, Y = 700 Nm; ⑥ 450° < X, Y = 500 Nm, where Y represents the torque limit value.

[0093] In addition, as described in the previous embodiment, when limiting the output torque of the engine, compared with the 4L mode + rear axle lock-up situation, the limit on the output torque of the engine is greater in the 4L mode + front axle lock-up and rear axle lock-up situation, that is, the output torque of the engine is made smaller. Exemplarily, within the same angular interval, in the 4L mode + front axle lock-up and rear axle lock-up situation, the torque limit value is on average reduced by 100 - 200 Nm compared with the 4L mode + rear axle lock-up situation. The reduction amount of the torque limit value can be determined according to the displacement of the vehicle and the strength of the transmission system, and no specific limitation is made here.

[0094] In some embodiments, when controlling the output torque of the engine, the differential lock model also needs to be considered. Generally speaking, the larger the differential lock model value, the stronger the corresponding torque-bearing capacity, and the smaller the torque limit value set. For example, if the differential lock models are ELD27, ELD45, and ELD54 respectively, then ELD54 has the strongest torque-bearing capacity and the corresponding torque limit value is the smallest.

[0095] It should be noted that the division of the above angular intervals and the setting of the specific values of the torque limit value can be adjusted according to the actual situation of the vehicle. This embodiment is only for exemplary illustration and no specific limitation is made here.

[0096] In some embodiments, the driving state information includes the steering wheel angle, and the selecting of the corresponding preset clamping force according to the driving state information in the torque limit request includes:

[0097] Select a corresponding preset clamping force according to the correspondence between the steering wheel angle and the preset clamping force, where the steering wheel angle is negatively correlated with the preset clamping force.

[0098] Specifically, when setting the preset clamping force, different clamping forces need to be set according to the angle partition of the steering wheel angle. In the 4L mode, the larger the steering wheel angle, the smaller the clamping force, that is, the larger the steering wheel angle, the smaller the braking force applied to the vehicle. On the contrary, the smaller the steering wheel angle, the larger the braking force applied to the vehicle. The setting of the preset clamping force limits the vehicle speed and ensures that the vehicle can pass smoothly on complex roads.

[0099] Within the above 6 angle intervals, different torque limit values are set respectively. Exemplarily, the torque limit values are specifically: ① When X < 90°, Z = 100N; ② When 90° < X ≤ 180°, Z = 80N; ③ When 180° < X ≤ 270°, Z = 60N; ④ When 270° < X ≤ 360°, Z = 40N; ⑤ When 360° < X ≤ 450°, Z = 30N; ⑥ When 450° < X, Z = 20N, where Z represents the preset clamping force.

[0100] It should be noted that the division of the above angle intervals and the setting of the specific values of the clamping force can be adjusted according to the actual situation of the vehicle. This embodiment is only for exemplary illustration and is not specifically limited here.

[0101] It should be noted that the method of the embodiment of the present application can be executed by a single device, such as a computer or a server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In this case of a distributed scenario, one of the multiple devices can only execute one or more steps of the method of the embodiment of the present application, and these multiple devices will interact with each other to complete the described method.

[0102] It should be noted that some embodiments of the present application have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be executed in a different order from those in the above embodiments and still achieve the desired result. Additionally, the processes depicted in the figures do not necessarily require the specific order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0103] Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present application also provides an engine torque control device.

[0104] Refer to Figure 4 , the engine torque control device includes:

[0105] An acquisition module 402, configured to acquire the driving mode of the vehicle and the differential lock locking state;

[0106] A first determination module 404, configured to acquire the driving state information of the vehicle in response to the driving mode and the differential lock locking state satisfying a first preset condition, where the first preset condition is used to characterize the driving mode and the differential lock locking state of a vehicle that needs torque limitation;

[0107] A second determination module 406, configured to send a torque limitation request in response to the driving state information satisfying a second preset condition, where the torque limitation request is used to control the engine output torque, and the second preset condition is used to characterize the driving state of a vehicle that needs torque limitation.

[0108] In some embodiments, the driving mode includes a low-speed four-wheel drive mode, and the differential lock locking state includes rear axle locking, front axle locking, and rear axle locking.

[0109] The first determination module 404 is further configured to satisfy the first preset condition in response to the driving mode being the low-speed four-wheel drive mode and the differential lock locking state being the rear axle locking; or,

[0110] In response to the driving mode being the low-speed four-wheel drive mode and the differential lock locking state being the front axle locking and rear axle locking, the first preset condition is satisfied.

[0111] In some embodiments, the driving state information at least includes the steering wheel angle of the vehicle, the gear information, the engine speed change rate, and the throttle pedal opening.

[0112] The second determination module 406 is further configured to satisfy the second preset condition in response to the gear information being a forward gear, the throttle pedal opening being greater than a preset opening threshold, and the engine speed change rate remaining unchanged or increasing; or,

[0113] In response to the gear information being a reverse gear and the steering wheel angle being greater than a preset angle threshold, the second preset condition is satisfied.

[0114] In some embodiments, it further includes a prompt module 408, configured to,

[0115] Acquire all-terrain information;

[0116] Send a torque limitation information display request based on at least one of the all-terrain information, the driving mode, the differential lock locking state, and the driving state information to display torque limitation prompt information of the vehicle to the user.

[0117] This application also provides an engine torque control device. Refer to Figure 5, the engine torque control device includes:

[0118] A selection module 502, configured to select a corresponding preset torque limit value according to the driving state information of the vehicle in the torque limit request in response to receiving the torque limit request;

[0119] A control module 504, configured to control the output torque of the engine based on the preset torque limit value.

[0120] In some embodiments, the selection module 502 is further configured to select a corresponding preset torque limit value and a preset clamping force according to the driving state information in the torque limit request in response to receiving the torque limit request;

[0121] The control module 504 is further configured to control the output torque of the engine based on the preset torque limit value, and control the braking force of the caliper based on the preset clamping force.

[0122] In some embodiments, the driving state information includes the steering wheel angle, and the selection module 502 is further configured to select a corresponding preset torque limit value according to the correspondence between the steering wheel angle and the preset torque limit value, wherein the steering wheel angle is negatively correlated with the preset torque limit value.

[0123] In some embodiments, the driving state information includes the steering wheel angle, and the selection module 502 is further configured to select a corresponding preset clamping force according to the correspondence between the steering wheel angle and the preset clamping force, wherein the steering wheel angle is negatively correlated with the preset clamping force.

[0124] For the convenience of description, when describing the above device, it is divided into various modules according to functions and described separately. Of course, when implementing the present application, the functions of each module can be implemented in one or more software and / or hardware.

[0125] The device in the above embodiment is used to implement the corresponding engine torque control method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0126] Based on the same inventive concept, corresponding to the method in any of the above embodiments, the present application further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the engine torque control method described in any of the above embodiments when executing the program.

[0127] Figure 6FIG. 0 shows a more specific schematic diagram of the hardware structure of the electronic device provided in this embodiment. The device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. Among them, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are communicatively connected to each other inside the device through the bus 1050.

[0128] The processor 1010 may be implemented in the form of a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0129] The memory 1020 may be implemented in the form of a ROM (Read Only Memory), a RAM (Random Access Memory), a static storage device, a dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When implementing the technical solutions provided in the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0130] The input / output interface 1030 is used to connect to an input / output module to implement information input and output. The input / output module may be configured as a component in the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Among them, the input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a display, a speaker, a vibrator, an indicator light, etc.

[0131] The communication interface 1040 is used to connect to a communication module (not shown in the figure) to implement communication interaction between this device and other devices. Among them, the communication module may implement communication in a wired manner (such as USB, network cable, etc.) or in a wireless manner (such as mobile network, WIFI, Bluetooth, etc.).

[0132] The bus 1050 includes a path for transmitting information between various components of the device (such as the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0133] It should be noted that although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040, and the bus 1050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, those skilled in the art can understand that the above device may also only include the components necessary to implement the solution of the embodiments of this specification, and does not necessarily include all the components shown in the figure.

[0134] The electronic device of the above embodiment is used to implement the corresponding engine torque control method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0135] Based on the same inventive concept, corresponding to any of the above method embodiments, the present application also provides a computer-readable storage medium, which stores computer instructions for causing the computer to execute the engine torque control method as described in any of the foregoing embodiments.

[0136] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD), or other optical storage, magnetic cassette tapes, magnetic disk storage, or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device.

[0137] The computer instructions stored in the storage medium of the above embodiment are used to cause the computer to execute the engine torque control method as described in any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be elaborated here.

[0138] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary, and is not intended to imply that the scope of the present application (including the claims) is limited to these examples; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the embodiments of the present application as described above, and they are not provided in detail for the sake of brevity.

[0139] In addition, for simplicity of explanation and discussion, and so as not to make the embodiments of the present application difficult to understand, well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Further, the devices may be shown in block diagram form in order to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present application are to be implemented (i.e., these details should be fully within the understanding of those skilled in the art). In cases where specific details (such as circuits) are set forth to describe exemplary embodiments of the present application, it will be apparent to those skilled in the art that the embodiments of the present application may be practiced without these specific details or with variations of these specific details. Accordingly, these descriptions should be considered illustrative rather than restrictive.

[0140] Although the present application has been described in connection with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (such as dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0141] Embodiments of the present application are intended to cover all such alternatives, modifications, and variations that fall within the broad scope of the appended claims. Accordingly, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. An engine torque control method, characterized in that, Including: Obtain the driving mode of the vehicle and the locking state of the differential lock; In response to the driving mode and the differential lock locking state satisfying a first preset condition, obtain the driving state information of the vehicle, where the first preset condition is used to characterize the driving mode and the differential lock locking state of the vehicle that needs torque limitation; the first preset condition includes that the driving mode is the low-speed four-wheel drive mode and the differential lock locking state is the rear axle locked, or the front axle locked and the rear axle locked; In response to the driving state information satisfying a second preset condition, send a torque limitation request, where the torque limitation request is used to control the engine output torque, and the second preset condition is used to characterize the driving state of the vehicle that needs torque limitation.

2. The engine torque control method according to claim 1, characterized in that The "in response to the driving mode and the differential lock locking state satisfying the first preset condition" includes: In response to the driving mode being the low-speed four-wheel drive mode and the differential lock locking state being the rear axle locked, satisfying the first preset condition; or, In response to the driving mode being the low-speed four-wheel drive mode and the differential lock locking state being the front axle locked and the rear axle locked, satisfying the first preset condition.

3. The engine torque control method according to claim 1, characterized in that The driving state information at least includes the steering wheel angle, gear information, engine speed change rate, and accelerator pedal opening of the vehicle, The "in response to the driving state information satisfying the second preset condition" includes: In response to the gear information being the forward gear, the accelerator pedal opening being greater than a preset opening threshold and the engine speed change rate remaining unchanged or increasing, satisfying the second preset condition; or, In response to the gear information being the reverse gear and the steering wheel angle being greater than a preset angle threshold, satisfying the second preset condition.

4. The engine torque control method according to claim 1, characterized in that, It also includes: Obtain the all-terrain information; Based on at least one of the all-terrain information, the driving mode, the differential lock locking state, and the driving state information, send a torque limitation information display request to display the torque limitation prompt information of the vehicle to the user.

5. An engine torque control method, characterized in that, Including: In response to receiving the torque limitation request, select a corresponding preset torque limitation value according to the driving state information of the vehicle in the torque limitation request; The driving state information includes the steering wheel angle, and the "selecting a corresponding preset torque limitation value according to the driving state information of the vehicle in the torque limitation request" includes: Select a corresponding preset torque limitation value according to the correspondence between the steering wheel angle and the preset torque limitation value, where the steering wheel angle and the preset torque limitation value are negatively correlated; When the steering wheel angle is constant, the first preset torque limitation value is less than the second preset torque limitation value; where the first preset torque limitation value is the preset torque limitation value corresponding to the driving mode being the low-speed four-wheel drive mode and the differential lock locking state being the front axle locked and the rear axle locked, and the second preset torque limitation value is the preset torque limitation value corresponding to the driving mode being the low-speed four-wheel drive mode and the differential lock locking state being the rear axle locked; Based on the preset torque limitation value, control the output torque of the engine.

6. The engine torque control method according to claim 5, characterized in that, It also includes: In response to receiving the torque limitation request, select a corresponding preset torque limitation value and a preset clamping force according to the driving state information in the torque limitation request; Control the output torque of the engine based on the preset torque limit value, and control the braking force of the caliper based on the preset clamping force.

7. The engine torque control method according to claim 6, wherein The driving state information includes the steering wheel angle. The selecting the corresponding preset clamping force according to the driving state information in the torque limit request includes: Select the corresponding preset clamping force according to the correspondence between the steering wheel angle and the preset clamping force, wherein the steering wheel angle is negatively correlated with the preset clamping force.

8. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, the method described in any one of claims 1 to 7 is implemented.

9. A vehicle, characterized in that, An electronic device as described in claim 8 is included.

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