Vehicle and method and device for distributing drive non-slip torque

Abstract

The application discloses a vehicle and a driving anti-slip torque distribution method and device thereof, and the method comprises the following steps: acquiring an activation state of a front axle TCS function and an activation state of a rear axle TCS function; determining an inter-axle torque distribution coefficient according to the activation state of the front axle TCS function and the activation state of the rear axle TCS function; determining a front axle distribution demand torque and a rear axle distribution demand torque based on the inter-axle torque distribution coefficient; and determining a front axle target torque and a rear axle target torque according to the activation state of the front axle TCS function, the activation state of the rear axle TCS function, a front axle distribution torque or a front axle request torque, a rear axle distribution torque or a rear axle request torque. The distribution method can maximize the total driving torque during the activation process of the TCS driving anti-slip function, so that the total driving torque is close to the driver demand torque as much as possible, and the power loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a method for distributing anti-slip torque to a vehicle, a vehicle, and a device for distributing anti-slip torque to a vehicle. Background Technology

[0002] Currently, in pure electric four-wheel drive vehicles or dual-motor hybrid four-wheel drive vehicles, after the TCS (Traction Control System) anti-slip function is activated, the control method is usually that the vehicle controller directly executes the requested torque after TCS torque reduction for the slipping axle, while the non-slipping axle maintains the original torque. This inevitably results in the actual total driving torque being smaller than the actual total driving torque when there is no slippage, causing some power loss and failing to meet the driver's needs to the maximum extent. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, the first objective of this invention is to propose a method for driving anti-slip torque distribution in a vehicle. This method involves obtaining the activation states of the front axle TCS function and the rear axle TCS function; determining an inter-axle torque distribution coefficient based on the activation states of the front and rear axle TCS functions; determining the required torque for front axle and rear axle distribution based on the inter-axle torque distribution coefficient; and determining the target torque for the front axle and rear axle based on the activation states of the front and rear axle TCS functions, the front axle distributed torque or the requested torque for the front axle, and the rear axle distributed torque or the requested torque for the rear axle. This method ensures that the total driving torque does not decrease to the greatest extent possible during the activation of the TCS driving anti-slip function, making the total driving torque as close as possible to the driver's required torque and reducing power loss.

[0004] The second objective of this invention is to provide a vehicle.

[0005] The third objective of this invention is to provide a vehicle drive anti-slip torque distribution device.

[0006] To achieve the above objectives, a first aspect of the present invention provides a method for driving anti-slip torque distribution of a vehicle, the method comprising: acquiring the activation state of the front axle TCS function and the activation state of the rear axle TCS function of the vehicle; determining an inter-axle torque distribution coefficient based on the activation state of the front axle TCS function and the activation state of the rear axle TCS function; determining the required torque for front axle distribution and the required torque for rear axle distribution based on the inter-axle torque distribution coefficient; and determining the target torque for front axle distribution and the target torque for rear axle distribution based on the activation state of the front axle TCS function, the activation state of the rear axle TCS function, the required torque for front axle distribution or the required torque for front axle distribution, and the required torque for rear axle distribution or the required torque for rear axle distribution.

[0007] According to an embodiment of the present invention, a method for driving anti-slip torque distribution in a vehicle involves obtaining the activation states of the front axle TCS function and the rear axle TCS function; determining an inter-axle torque distribution coefficient based on the activation states of the front and rear axle TCS functions; determining the required torque for front axle and rear axle distribution based on the inter-axle torque distribution coefficient; and determining the target torque for the front axle and the target torque for the rear axle based on the activation states of the front and rear axle TCS functions, the allocated torque or requested torque for the front axle, and the allocated torque or requested torque for the rear axle. Therefore, this method can ensure that the total driving torque does not decrease to the greatest extent possible during the activation of the TCS driving anti-slip function, making the total driving torque as close as possible to the torque required by the driver, and reducing power loss.

[0008] In addition, the vehicle drive anti-slip torque distribution method according to the above embodiments of the present invention may also have the following additional technical features:

[0009] According to one embodiment of the present invention, determining the inter-axle torque distribution coefficient based on the activation state of the front axle TCS function and the activation state of the rear axle TCS function includes: when both the front axle TCS function and the rear axle TCS function are inactive, determining the inter-axle torque distribution coefficient as the original inter-axle torque distribution coefficient; wherein the original inter-axle torque distribution coefficient is determined based on the vehicle's economy and power performance; when the rear axle TCS function is active, determining a first inter-axle torque distribution coefficient based on the rear axle TSC requested torque, the lower limit of the rear axle torque capacity, the upper limit of the rear axle torque capacity, and the vehicle's total required torque; and when the front axle TCS function is active, determining a second inter-axle torque distribution coefficient based on the total required torque, the front axle TCS requested torque, the lower limit of the rear axle torque capacity, and the upper limit of the rear axle torque capacity.

[0010] According to an embodiment of the present invention, the step of determining the first inter-axle torque distribution coefficient based on the rear axle TSC requested torque, the lower limit of the rear axle torque capacity, the upper limit of the rear axle torque capacity, and the total required torque includes: when the rear axle TSC requested torque is greater than the lower limit of the rear axle torque capacity, using the ratio of the minimum value of the rear axle TSC requested torque and the upper limit of the rear axle torque capacity to the total required torque as the first inter-axle torque distribution coefficient; and when the rear axle TSC requested torque is less than the lower limit of the rear axle torque capacity, using the ratio of the lower limit of the rear axle torque capacity to the total required torque as the first inter-axle torque distribution coefficient.

[0011] According to one embodiment of the present invention, determining the second inter-axle torque distribution coefficient based on the total required torque, the front axle TSC requested torque, the lower limit of the rear axle torque capacity, and the upper limit of the rear axle torque capacity includes: determining the torque difference between the total required torque and the front axle TSC requested torque; when the torque difference is greater than the lower limit of the rear axle torque capacity, using the ratio of the minimum of the torque difference and the upper limit of the rear axle torque capacity to the total required torque as the second inter-axle torque distribution coefficient; when the torque difference is less than the lower limit of the rear axle torque capacity, using the ratio of the lower limit of the rear axle torque capacity to the total required torque as the second inter-axle torque distribution coefficient.

[0012] According to an embodiment of the present invention, determining the required torque for the front axle and the required torque for the rear axle based on the inter-axle torque distribution coefficient includes: when the inter-axle torque distribution coefficient is the original inter-axle torque distribution coefficient, multiplying the total required torque by the original inter-axle torque distribution coefficient as a first distribution torque, and using the difference between the total required torque and the first distribution torque as a second distribution torque; when the first distribution torque is greater than the lower limit of the rear axle torque capacity, using the minimum value between the first distribution torque and the upper limit of the rear axle torque capacity as the required torque for the rear axle; when the first distribution torque is less than the lower limit of the rear axle torque capacity, using the lower limit of the rear axle torque capacity as the required torque for the rear axle; when the second distribution torque is greater than the lower limit of the front axle torque capacity, using the minimum value between the second distribution torque and the upper limit of the front axle torque capacity as the required torque for the front axle; when the second distribution torque is less than the lower limit of the front axle torque capacity, using the lower limit of the front axle torque capacity as the required torque for the front axle.

[0013] According to one embodiment of the present invention, determining the required torque for the front axle and the required torque for the rear axle based on the inter-axle torque distribution coefficient includes: when the inter-axle torque distribution coefficient is the first inter-axle torque distribution coefficient, multiplying the total required torque by the first inter-axle torque distribution coefficient as a third distribution torque, and using the difference between the total required torque and the third distribution torque as a fourth distribution torque; when the fourth distribution torque is greater than the lower limit of the front axle torque capacity, using the minimum value between the fourth distribution torque and the upper limit of the front axle torque capacity as the required torque for the front axle; when the fourth distribution torque is less than the lower limit of the front axle torque capacity, using the lower limit of the front axle torque capacity as the required torque for the front axle.

[0014] According to one embodiment of the present invention, determining the required torque for rear axle distribution based on the inter-axle torque distribution coefficient includes: when the inter-axle torque distribution coefficient is the second inter-axle torque distribution coefficient, multiplying the total required torque by the second inter-axle torque distribution coefficient as the fifth distribution torque; when the fifth distribution torque is greater than the lower limit of the rear axle torque capacity, using the minimum value between the fifth distribution torque and the upper limit of the rear axle torque capacity as the required torque for rear axle distribution; when the fifth distribution torque is less than the lower limit of the rear axle torque capacity, using the lower limit of the rear axle torque capacity as the required torque for rear axle distribution.

[0015] According to one embodiment of the present invention, determining the front axle target torque based on the activation state of the front axle TCS function, the activation state of the rear axle TCS function, the front axle allocated torque or the front axle requested torque, and the rear axle allocated torque or the rear axle requested torque includes: when both the front axle TCS function and the rear axle TCS function are inactive, using the front axle allocated torque as the front axle target torque and the rear axle allocated torque as the rear axle target torque; when both the front axle TCS function and the rear axle TCS function are active, using the front axle requested torque as the front axle target torque and the rear axle requested torque as the rear axle target torque; when the front axle TCS function is active and the rear axle TCS function is inactive, using the front axle requested torque as the front axle target torque and the rear axle allocated torque as the rear axle target torque; when the front axle TCS function is inactive and the rear axle TCS function is active, using the front axle allocated torque as the front axle target torque and the rear axle requested torque as the rear axle target torque.

[0016] To achieve the above objectives, a second aspect of the present invention provides a vehicle including a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, it implements the above-described method for distributing anti-slip torque in a vehicle.

[0017] According to the vehicle of the present invention, by executing the above-described vehicle drive anti-slip torque distribution method, the total drive torque can be kept as close as possible to the driver's required torque during the activation of the TCS drive anti-slip function, thereby reducing power loss.

[0018] To achieve the above objectives, a third aspect of the present invention provides a driving anti-slip torque distribution device for a vehicle, the device comprising: an acquisition module for acquiring the activation state of the front axle TCS function and the activation state of the rear axle TCS function of the vehicle; a first determination module for determining an inter-axle torque distribution coefficient based on the activation state of the front axle TCS function and the activation state of the rear axle TCS function; a second determination module for determining the required torque for front axle distribution and the required torque for rear axle distribution based on the inter-axle torque distribution coefficient; and a third determination module for determining the target torque for front axle distribution and the target torque for rear axle distribution based on the activation state of the front axle TCS function, the activation state of the rear axle TCS function, the front axle distributed torque or the front axle requested torque, and the rear axle distributed torque or the rear axle requested torque.

[0019] According to an embodiment of the present invention, a vehicle drive anti-slip torque distribution device includes an acquisition module for acquiring the activation state of the front axle TCS function and the rear axle TCS function; a first determining module for determining an inter-axle torque distribution coefficient based on the activation states of the front axle and rear axle TCS functions; a second determining module for determining the required torque for front axle distribution and the required torque for rear axle distribution based on the inter-axle torque distribution coefficient; and a third determining module for determining the target torque for the front axle and the target torque for the rear axle based on the activation states of the front axle and rear axle TCS functions, the front axle distributed torque or the requested torque for the front axle, and the rear axle distributed torque or the requested torque for the rear axle. Thus, this device can ensure that the total drive torque does not decrease to the greatest extent possible during the activation of the TCS drive anti-slip function, making the total drive torque as close as possible to the torque required by the driver, and reducing power loss.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] Figure 1 This is a flowchart of a vehicle drive anti-slip torque distribution method according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram illustrating the calculation process of the inter-shaft torque distribution coefficient according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the drive anti-slip torque distribution calculation process according to an embodiment of the present invention;

[0024] Figure 4 A flowchart illustrating a method for distributing anti-slip torque to a vehicle according to a specific example of the present invention;

[0025] Figure 5 A schematic block diagram of a vehicle according to an embodiment of the present invention;

[0026] Figure 6 This is a block diagram of a vehicle's drive anti-slip torque distribution device according to an embodiment of the present invention. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] The following description, with reference to the accompanying drawings, describes the vehicle's drive anti-slip torque distribution method, vehicle, and vehicle drive anti-slip torque distribution device according to embodiments of the present invention.

[0029] Figure 1 This is a flowchart of a vehicle drive anti-slip torque distribution method according to an embodiment of the present invention.

[0030] like Figure 1 As shown, the vehicle drive anti-slip torque distribution method of this embodiment may include the following steps:

[0031] S1, obtain the activation status of the front axle TCS function and the rear axle TCS function of the vehicle.

[0032] S2, determine the inter-axle torque distribution coefficient based on the activation status of the front axle TCS function and the rear axle TCS function.

[0033] S3, determine the required torque distribution for the front axle and the required torque distribution for the rear axle based on the inter-axle torque distribution coefficient;

[0034] S4. Determine the target torque for the front axle and the target torque for the rear axle based on the activation status of the front axle TCS function, the activation status of the rear axle TCS function, the front axle distributed torque or the front axle requested torque, and the rear axle distributed torque or the rear axle requested torque.

[0035] Specifically, the activation status of the front and rear axle TCS functions is first obtained. In other words, it detects whether the TCS has been activated due to slippage on the front and rear axles. This can be done by monitoring wheel speeds and other dynamic vehicle parameters using sensors to determine if TCS activation is necessary to prevent slippage. For example, wheel speed sensors can monitor the rotational speed of each wheel. Slippage typically manifests as abnormal rotational speeds of one or more wheels, which do not match the expected speed of the other wheels or the vehicle itself. When the detected data exceeds a wheel speed threshold, it is considered necessary to activate TCS to adjust braking force or engine output and reduce slippage.

[0036] After obtaining the activation status of the front axle TCS and rear axle TCS functions of the vehicle, the inter-axle torque distribution coefficient can be determined based on these activation statuses. In other words, torque distribution is adjusted according to the TCS activation status to optimize vehicle traction and stability. For example, when neither the front nor rear axle TCS is activated, the original inter-axle torque distribution coefficient is used. This original coefficient can be defined as the ratio of the rear axle's required torque to the total driver's required torque. The original coefficient can be calculated based on the vehicle's economy and power performance for front and rear axle distribution. If either axle's TCS is activated, for example, when the front axle TCS is activated, the original inter-axle torque distribution coefficient can be increased; when the rear axle TCS is activated, it can be decreased. This allows torque loss from the front axle to be transferred to the rear axle when the front axle TCS is activated, and vice versa.

[0037] Therefore, after determining the inter-axle torque distribution coefficient, the required torque for the front axle and the required torque for the rear axle can be distributed based on the inter-axle torque distribution coefficient. For example, the required torque for the front axle and the required torque for the rear axle can be determined by multiplying the total required torque (the total torque required by the vehicle under current driving conditions, such as by the driver's input through the accelerator pedal) with the inter-axle torque distribution coefficient.

[0038] After determining the required torque for the front axle and rear axle, the target torques for the front and rear axles can be determined based on the activation status of the front and rear axle TCS functions, the front axle allocated torque or requested torque, and the rear axle allocated torque or requested torque. For example, when both the front and rear axle TCS functions are active, the torque distribution coefficient is the original inter-axle torque distribution coefficient. This means that both axles request torque via TCS without torque transfer; therefore, the target torque for the front axle is the requested torque, and the target torque for the rear axle is the requested torque. Conversely, when both the front and rear axle TCS functions are inactive, the torque distribution coefficient is the original inter-axle torque distribution coefficient. The front axle allocated torque calculated using the original inter-axle torque distribution coefficient can be used as the target torque for the front axle, and the rear axle allocated torque can be used as the target torque for the rear axle. For example, when either the front axle TCS function or the rear axle TCS function is active, the requested torque corresponding to the active state can be used as the target requested torque, and the distributed torque determined by the inter-axle torque distribution coefficient for the inactive axle can be used as the target requested torque.

[0039] Therefore, by monitoring the TCS activation status of each axle and the dynamic response of the vehicle in real time, the torque distribution can be dynamically adjusted to ensure the best performance and safety of the vehicle under various road conditions. In the event of slippage, torque can be effectively redistributed to improve the stability and handling of the vehicle, while reducing the power loss caused by slippage.

[0040] According to one embodiment of the present invention, determining the inter-axle torque distribution coefficient based on the activation state of the front axle TCS function and the activation state of the rear axle TCS function includes: when both the front axle TCS function and the rear axle TCS function are inactive, determining the inter-axle torque distribution coefficient as the original inter-axle torque distribution coefficient; wherein the original inter-axle torque distribution coefficient is determined based on the vehicle's economy and power performance; when the rear axle TCS function is active, determining the first inter-axle torque distribution coefficient based on the rear axle TSC requested torque, the lower limit of the rear axle torque capacity, the upper limit of the rear axle torque capacity, and the total demand torque of the vehicle; and when the front axle TCS function is active, determining the second inter-axle torque distribution coefficient based on the total demand torque, the front axle TCS requested torque, the lower limit of the rear axle torque capacity, and the upper limit of the rear axle torque capacity.

[0041] Specifically, when determining the inter-axle torque distribution coefficient based on the activation status of the front axle TCS function and the rear axle TCS function, the activation status of both functions is simultaneously assessed. If both the front and rear axle TCS functions are inactive, it indicates that neither the front nor rear axle of the vehicle is slipping, and the inter-axle torque distribution coefficient can be determined as the original inter-axle torque distribution coefficient. This coefficient is pre-set based on the vehicle's fuel economy and power requirements, used to distribute torque between the front and rear axles under normal driving conditions. For example, if the original inter-axle torque distribution coefficient is 0.4, it means that without slippage, the rear axle will receive 40% of the total required torque, while the front axle will receive 60%.

[0042] Simultaneously, the activation status of the front axle TCS function and the rear axle TCS function are determined. If the rear axle TCS function is active, meaning the front axle TCS function is inactive, it indicates that only the rear axle is slipping, and the inter-axle torque distribution coefficient needs to be recalculated. In this case, the reduced torque from the rear axle will be transferred to the front axle to maintain the vehicle's total drive torque and reduce power loss caused by slippage. The first axle torque distribution coefficient can be determined based on the rear axle TSC requested torque (the torque to be reduced), the rear axle torque capacity lower limit (the torque value that ensures the basic driving ability of the vehicle), the rear axle torque capacity upper limit (the maximum torque value that the rear axle can withstand), and the vehicle's total required torque (the total required torque of the vehicle refers to the total torque required by the vehicle under specific driving conditions to meet the driver's acceleration needs or maintain a specific speed. It can be determined by the driver through the input of the accelerator pedal, taking into account the vehicle's current driving state (such as vehicle speed, acceleration, road conditions, etc.)). For example, the first axle torque distribution coefficient can be determined according to a pre-determined relationship table, where a rear axle TSC requested torque, rear axle torque capacity lower limit, rear axle torque capacity upper limit, and total required torque correspond to a corresponding first axle torque distribution coefficient. Given the rear axle TSC requested torque, rear axle torque capacity lower limit, rear axle torque capacity upper limit, and total required torque of the vehicle, the first axle torque distribution coefficient can be determined according to this relationship table.

[0043] Simultaneously, the activation status of the front axle TCS function and the rear axle TCS function are determined. If the front axle TCS function is active, meaning the rear axle TCS function is inactive, it indicates that only the front axle is slipping, and the inter-axle torque distribution coefficient needs to be recalculated. In this case, the reduced torque from the front axle will be transferred to the rear axle. The second inter-axle torque distribution coefficient can then be determined based on the total required torque, the front axle TCS requested torque, the lower limit of the rear axle torque capacity, and the upper limit of the rear axle torque capacity. For example, a pre-defined relationship table can be used, where a total required torque, a front axle TCS requested torque, a rear axle torque capacity lower limit, and a rear axle torque capacity upper limit correspond to a specific second inter-axle torque distribution coefficient. Given these parameters, the second inter-axle torque distribution coefficient can be determined using this relationship table.

[0044] According to an embodiment of the present invention, the determination of the first inter-axle torque distribution coefficient based on the rear axle TSC requested torque, the lower limit of the rear axle torque capacity, the upper limit of the rear axle torque capacity, and the total required torque includes: when the rear axle TSC requested torque is greater than the lower limit of the rear axle torque capacity, the ratio of the minimum value between the rear axle TSC requested torque and the upper limit of the rear axle torque capacity to the total required torque is used as the first inter-axle torque distribution coefficient; when the rear axle TSC requested torque is less than the lower limit of the rear axle torque capacity, the ratio of the lower limit of the rear axle torque capacity to the total required torque is used as the first inter-axle torque distribution coefficient.

[0045] Specifically, when determining the first axle torque distribution coefficient based on the rear axle TSC requested torque, the lower limit of the rear axle torque capacity, the upper limit of the rear axle torque capacity, and the total required torque, the relationship between the rear axle TSC requested torque and the lower limit of the rear axle torque capacity can be assessed. When the rear axle TSC requested torque is greater than the lower limit of the rear axle torque capacity, it indicates that the TCS system has adjusted the torque to reduce rear axle slippage, but the requested torque is still higher than the lower limit of the rear axle torque capacity. This means that the rear axle can still provide more torque without slippage. In this case, the method for calculating the first axle torque distribution coefficient is to take the minimum value between the rear axle TCS requested torque and the upper limit of the rear axle torque capacity, and then compare it with the total required torque to obtain a ratio, which is used as the first axle torque distribution coefficient.

[0046] When the requested torque of the rear axle TSC is less than the lower limit of the rear axle torque capacity, in order to maintain vehicle stability, the rear axle needs to be allocated at least the torque specified by the lower limit of the torque capacity. Therefore, the lower limit of the rear axle torque capacity is taken as the requested torque of the rear axle TSC, and the ratio of the lower limit of the rear axle torque capacity to the total required torque is taken as the first inter-axle torque distribution coefficient. That is to say, when the rear axle TCS is active, the inter-axle torque distribution coefficient (first inter-axle torque distribution coefficient) when TCS is active is equal to min(max(rear axle TCS requested torque, lower limit of rear axle torque capacity), upper limit of rear axle torque capacity) / (total required torque).

[0047] According to one embodiment of the present invention, determining a second inter-axle torque distribution coefficient based on the total required torque, the front axle TSC requested torque, the lower limit of the rear axle torque capacity, and the upper limit of the rear axle torque capacity includes: determining the torque difference between the total required torque and the front axle TSC requested torque; when the torque difference is greater than the lower limit of the rear axle torque capacity, using the ratio of the minimum of the torque difference and the upper limit of the rear axle torque capacity to the total required torque as the second inter-axle torque distribution coefficient; when the torque difference is less than the lower limit of the rear axle torque capacity, using the ratio of the lower limit of the rear axle torque capacity to the total required torque as the second inter-axle torque distribution coefficient.

[0048] Specifically, when determining the second axle torque distribution coefficient based on the total required torque, the front axle TCS requested torque, the lower limit of the rear axle torque capacity, and the upper limit of the rear axle torque capacity, firstly, the difference between the total required torque and the front axle TCS requested torque is calculated. This difference represents the additional torque that can be distributed to the rear axle. The relationship between this difference and the lower limit of the rear axle capacity is then assessed. If the torque difference is greater than the lower limit of the rear axle torque capacity, it means that more torque can be safely distributed to the rear axle without causing it to slip. In this case, the minimum of the torque difference and the upper limit of the rear axle torque capacity is taken. Then, the ratio of this value to the total required torque is calculated as the second axle torque distribution coefficient.

[0049] If the torque difference is less than the lower limit of the rear axle torque capacity, it means that in order to maintain vehicle stability, the rear axle needs to be allocated at least the torque specified by the lower limit of torque capacity. In this case, the ratio of the lower limit of the rear axle torque capacity to the total required torque is used as the second inter-axle torque distribution coefficient. This ratio ensures that even if the front axle slips severely, the rear axle can still provide at least the torque specified by the lower limit of torque capacity to maintain the vehicle's driving force and stability.

[0050] In other words, when the front axle TCS is active, the inter-axle torque distribution coefficient (second inter-axle torque distribution coefficient) is equal to min(max(total required torque - front axle TCS requested torque, rear axle torque capacity lower limit), rear axle torque capacity upper limit) / (total required torque).

[0051] According to one embodiment of the present invention, determining the required torque for the front axle and the required torque for the rear axle based on the inter-axle torque distribution coefficient includes: when the inter-axle torque distribution coefficient is the original inter-axle torque distribution coefficient, multiplying the total required torque by the original inter-axle torque distribution coefficient as the first distribution torque, and using the difference between the total required torque and the first distribution torque as the second distribution torque; when the first distribution torque is greater than the lower limit of the rear axle torque capacity, using the minimum value between the first distribution torque and the upper limit of the rear axle torque capacity as the rear axle distribution required torque; when the first distribution torque is less than the lower limit of the rear axle torque capacity, using the lower limit of the rear axle torque capacity as the rear axle distribution required torque; when the second distribution torque is greater than the lower limit of the front axle torque capacity, using the minimum value between the second distribution torque and the upper limit of the front axle torque capacity as the front axle distribution required torque; and when the second distribution torque is less than the lower limit of the front axle torque capacity, using the lower limit of the front axle torque capacity as the front axle distribution required torque.

[0052] Specifically, when determining the required torque for the front axle and rear axle based on the inter-axle torque distribution coefficient, the inter-axle torque distribution coefficient is first determined. When the inter-axle torque distribution coefficient is the original inter-axle torque distribution coefficient, that is, when TCS is not activated, the torque distribution ratio is preset based on the vehicle's economy and power performance. The product of the total required torque and the original inter-axle torque distribution coefficient can be used as the first distribution torque. After determining the first distribution torque, the difference between the total required torque and the first distribution torque is used as the second distribution torque.

[0053] The relationship between the first distributed torque and the lower limit of the rear axle torque capacity is determined. If the first distributed torque is greater than the lower limit of the rear axle torque capacity, it means that more torque can be safely distributed to the rear axle. In this case, the minimum value between the first distributed torque and the upper limit of the rear axle torque capacity is taken as the required distributed torque for the rear axle. If the first distributed torque is less than the lower limit of the rear axle torque capacity, it means that in order to maintain vehicle stability, the rear axle needs to be distributed with at least the torque specified by the lower limit of torque capacity. In this case, the lower limit of the rear axle torque capacity is taken as the required distributed torque for the rear axle.

[0054] In other words, the required torque for rear axle distribution = min(max((total required torque) * original inter-axle torque distribution coefficient, lower limit of rear axle torque capacity), upper limit of rear axle torque capacity).

[0055] The relationship between the second torque distribution and the lower limit of the front axle torque capacity is determined. If the second torque distribution is greater than the lower limit, it means that more torque can be safely distributed to the front axle. In this case, the minimum value between the second torque distribution and the upper limit of the front axle torque capacity is taken as the required torque distribution for the front axle. If the second torque distribution is less than the lower limit, it means that to maintain vehicle stability, the front axle needs to be distributed with at least the torque specified by the lower limit. In this case, the lower limit of the front axle torque capacity is taken as the required torque distribution for the front axle.

[0056] In other words, the required torque for front axle distribution = min(max((total required torque)*(1-original inter-axle torque distribution coefficient), lower limit of front axle torque capacity), upper limit of front axle torque capacity).

[0057] As a result, the vehicle can dynamically adjust the torque distribution between the front and rear axles to adapt to different driving conditions and road surfaces, thereby optimizing the vehicle's traction and stability.

[0058] According to one embodiment of the present invention, determining the required torque for front axle distribution based on the inter-axle torque distribution coefficient includes: when the inter-axle torque distribution coefficient is a first inter-axle torque distribution coefficient, multiplying the total required torque by the first inter-axle torque distribution coefficient as a third distribution torque, and using the difference between the total required torque and the third distribution torque as a fourth distribution torque; when the fourth distribution torque is greater than the lower limit of the front axle torque capacity, using the minimum value between the fourth distribution torque and the upper limit of the front axle torque capacity as the required torque for front axle distribution; when the fourth distribution torque is less than the lower limit of the front axle torque capacity, using the lower limit of the front axle torque capacity as the required torque for front axle distribution.

[0059] Specifically, when determining the required torque for the front axle and the rear axle based on the inter-axle torque distribution coefficient, the inter-axle torque distribution coefficient is first determined. When the inter-axle torque distribution coefficient is the first inter-axle torque distribution coefficient, i.e., when the rear axle TSC function is active, it is the proportional coefficient used for torque distribution. The product of the total required torque and the first inter-axle torque distribution coefficient can be used as the third distribution torque. After determining the third distribution torque, the difference between the total required torque and the third distribution torque is used as the fourth distribution torque.

[0060] The relationship between the fourth torque distribution and the lower limit of the front axle torque capacity is determined. If the fourth torque distribution is greater than the lower limit of the front axle torque capacity, it means that more torque can be safely distributed to the front axle. In this case, the minimum value between the fourth torque distribution and the upper limit of the front axle torque capacity is taken as the required torque for front axle distribution. If the fourth torque distribution is less than the lower limit of the front axle torque capacity, it means that in order to maintain vehicle stability, the front axle needs to be distributed with at least the torque specified by the lower limit of torque capacity. The lower limit of the front axle torque capacity can be taken as the required torque for front axle distribution.

[0061] In other words, the required torque for front axle distribution = min(max(total required torque * (1 - first axle torque distribution coefficient), lower limit of front axle torque capacity), upper limit of front axle torque capacity).

[0062] According to one embodiment of the present invention, determining the required torque for rear axle distribution based on the inter-axle torque distribution coefficient includes: when the inter-axle torque distribution coefficient is a second inter-axle torque distribution coefficient, multiplying the total required torque by the second inter-axle torque distribution coefficient as a fifth distribution torque; when the fifth distribution torque is greater than the lower limit of the rear axle torque capacity, taking the minimum value between the fifth distribution torque and the upper limit of the rear axle torque capacity as the required torque for rear axle distribution; when the fifth distribution torque is less than the lower limit of the rear axle torque capacity, taking the lower limit of the rear axle torque capacity as the required torque for rear axle distribution.

[0063] Specifically, when determining the required torque for the front axle and rear axle based on the inter-axle torque distribution coefficient, the inter-axle torque distribution coefficient is first determined. When the inter-axle torque distribution coefficient is the second inter-axle torque distribution coefficient, i.e., when the front axle TSC function is active, it is the proportional coefficient used for torque distribution. The product of the total required torque and the second inter-axle torque distribution coefficient can be used as the fifth distribution torque.

[0064] The relationship between the fifth torque distribution and the lower limit of the rear axle torque capacity is determined. If the fifth torque distribution is greater than the lower limit of the rear axle torque capacity, it means that more torque can be safely distributed to the rear axle. In this case, the minimum value between the fifth torque distribution and the upper limit of the rear axle torque capacity is taken as the required torque for the rear axle distribution. If the fifth torque distribution is less than the lower limit of the rear axle torque capacity, it means that in order to maintain the stability of the vehicle, the rear axle needs to be distributed with at least the torque specified by the lower limit of the torque capacity. The lower limit of the rear axle torque capacity can be taken as the required torque for the rear axle distribution.

[0065] In other words, the required torque for rear axle distribution = min(max(total required torque * second axle torque distribution coefficient), lower limit of rear axle torque capacity), upper limit of rear axle torque capacity).

[0066] According to one embodiment of the present invention, determining the target torque for the front axle and the target torque for the rear axle based on the activation state of the front axle TCS function, the activation state of the rear axle TCS function, the front axle distributed torque or the front axle requested torque, and the rear axle distributed torque or the rear axle requested torque includes: when both the front axle TCS function and the rear axle TCS function are inactive, using the front axle distributed torque as the target torque for the front axle and the rear axle distributed torque as the target torque for the rear axle; when both the front axle TCS function and the rear axle TCS function are active, using the front axle requested torque as the target torque for the front axle and the rear axle requested torque as the target torque for the rear axle; when the front axle TCS function is active and the rear axle TCS function is inactive, using the front axle requested torque as the target torque for the front axle and the rear axle distributed torque as the target torque for the rear axle; when the front axle TCS function is inactive and the rear axle TCS function is active, using the front axle distributed torque as the target torque for the front axle and the rear axle requested torque as the target torque for the rear axle.

[0067] Specifically, the target torques for the front axle and rear axle are determined based on the activation status of the front axle TCS function, the activation status of the rear axle TCS function, the front axle distributed torque or the front axle requested torque, and the rear axle distributed torque or the rear axle requested torque. The activation status of the front axle TCS function and the rear axle TCS function are then judged. If both the front axle TCS function and the rear axle TCS function are inactive, it indicates that the vehicle is in a normal driving state and no axle slippage has occurred. In this case, the target torque for the front axle is the front axle distributed torque, and the target torque for the rear axle is the rear axle distributed torque. That is, the vehicle distributes torque according to the original inter-axle torque distribution coefficient without any additional adjustment.

[0068] When both the front axle TCS and rear axle TCS functions are active, meaning slippage is detected on both axles of the vehicle, the TCS system intervenes to adjust torque to optimize traction. The target torque for the front axle is set to the torque requested by the front axle, and the target torque for the rear axle is set to the torque requested by the rear axle. In other words, the vehicle adjusts torque according to the request of the TCS system to reduce slippage and maintain vehicle stability.

[0069] When the front axle TCS function is active while the rear axle TCS function is inactive, it indicates that only the front axle is experiencing slippage, while the rear axle is not. The front axle target torque is set to the requested torque, while the rear axle target torque is the torque allocated to the rear axle. This means the vehicle adjusts the torque for the slipping front axle, while the rear axle distributes torque according to the second inter-axle torque distribution coefficient. Conversely, when the front axle TCS function is inactive while the rear axle TCS function is active, it indicates that only the rear axle is experiencing slippage, while the front axle is not. The rear axle target torque is set to the requested torque, while the front axle target torque is the torque allocated to the front axle. This means the vehicle adjusts the torque for the slipping rear axle, while the front axle distributes torque according to the first inter-axle torque distribution coefficient.

[0070] In summary, as a specific example, the calculation processes for the inter-axle torque distribution coefficient and the drive anti-slip torque distribution are as follows: Figure 2 and Figure 3As shown, the initial inter-axle torque distribution coefficient can be defined as r0, the inter-axle torque distribution coefficient when TCS is activated is r1 (including front axle TCS activation and rear axle TCS activation), and the final inter-axle torque distribution coefficient is r2. The final executed torque of the front axle is the target torque of the front axle, and the final executed torque of the rear axle is the target torque of the rear axle. Taking an initial inter-axle torque distribution coefficient r0 of 0.4, a total vehicle torque requirement of 1000 Nm, a lower limit of rear axle torque capacity and a lower limit of front axle torque capacity of 300 Nm, an upper limit of rear axle torque capacity and an upper limit of front axle torque capacity of 700 Nm, a front axle TCS requested torque of 550 Nm, and a rear axle TCS requested torque of 350 Nm as an example, when only the rear axle TCS function is active, the inter-axle torque distribution coefficient when TCS is activated is equal to min(max(rear axle TCS requested torque, The torque distribution coefficient between the front and rear axles is calculated as follows: (Lower limit of rear axle torque capacity), (Upper limit of rear axle torque capacity) / (Total required torque). This allows the torque loss from the rear axle to be transferred to the front axle, i.e., r1 = 350 / 1000 = 0.35. When only the front axle TCS function is active, the torque distribution coefficient between the axles when TCS is active is equal to min(max((Total required torque - Front axle TCS requested torque)), (Lower limit of rear axle torque capacity), (Upper limit of rear axle torque capacity) / (Front axle driver required torque + Rear axle driver required torque). This allows the torque loss from the front axle to be transferred to the rear axle, i.e., r1 = 450 / 1000 = 0.45.

[0071] When calculating the target torque for the front axle and rear axle, if the TCS is not activated, the final inter-axle torque distribution coefficient r2 = r0, and the required torque for the rear axle is min(max(total required torque * original inter-axle torque distribution coefficient, lower limit of rear axle torque capacity), upper limit of rear axle torque capacity) = 1000 * 0.4 = 400 Nm; the required torque for the front axle is min(max((total required torque) * (1 - original inter-axle torque distribution coefficient), lower limit of rear axle torque capacity), upper limit of rear axle torque capacity) = 1000 * (1 - 0.4) = 600 Nm. Therefore, the target torque for the front axle is 600 Nm and the target torque for the rear axle is 400 Nm.

[0072] When both the front and rear axle TCSs are activated, the target torque for the front axle can be determined as the torque requested by the front axle TCS, which is 550 Nm, and the target torque for the rear axle can be determined as the torque requested by the rear axle TCS, which is 350 Nm.

[0073] When the rear axle TCS is activated and the front axle TCS is deactivated, the final inter-axle torque distribution coefficient r2 = r1 = 0.35. The target torque for the rear axle is the torque requested by the rear axle TCS, which is 350 Nm. The required torque for the front axle is min(max((total required torque) * (1 - inter-axle torque distribution coefficient when TCS is activated), lower limit of front axle torque capacity), upper limit of front axle torque capacity) = 1000(*1 - 0.35) = 650 Nm. Therefore, the target torque for the front axle is the required torque for the front axle distribution, which is 650 Nm. Thus, the torque lost by the rear axle has been transferred to the front axle, and there is no loss in total drive torque.

[0074] When only the front axle TCS is active and the rear axle TCS is inactive, the final inter-axle torque distribution coefficient r2=r1=0.45. The target torque for the front axle is the torque requested by the front axle TCS, which is 550 Nm. The required torque for the rear axle is min(max((total required torque) * inter-axle torque distribution coefficient when TCS is active, lower limit of rear axle torque capacity), upper limit of rear axle torque capacity) = 1000 * 0.45 = 450 Nm. Therefore, the target torque for the rear axle is the required torque for the rear axle, which is 450 Nm. Since the torque lost by the front axle has been transferred to the rear axle, there is no loss in total drive torque.

[0075] The following is combined Figure 4 The distribution method of the present invention will be described below.

[0076] As a specific example, the vehicle drive anti-slip torque distribution method of the present invention may include the following steps:

[0077] S101, obtain the activation status of the front axle TCS function and the activation status of the rear axle TCS function of the vehicle, and proceed to steps S101, S110 and S115 respectively.

[0078] S102, when both the front axle TCS function and the rear axle TCS function are inactive, determine the inter-axle torque distribution coefficient as the original inter-axle torque distribution coefficient.

[0079] S103, the product of the total required torque and the original inter-shaft torque distribution coefficient is used as the first distribution torque, and the difference between the total required torque and the first distribution torque is used as the second distribution torque, and then proceed to steps S104 and S107 respectively.

[0080] S104. Determine whether the first distributed torque is greater than the lower limit of the rear axle torque capacity. If yes, proceed to step S105; if no, proceed to step S106.

[0081] S105, the minimum value between the first distributed torque and the upper limit of the rear axle torque capacity is taken as the target torque of the rear axle.

[0082] S106 uses the lower limit of the rear axle torque capacity as the target torque for the rear axle.

[0083] S107, Determine whether the second distributed torque is greater than the lower limit of the front axle torque capacity. If yes, proceed to step S108; if no, proceed to step S109.

[0084] S108 uses the minimum of the fourth distribution torque and the upper limit of the front axle torque capacity as the front axle distribution demand torque.

[0085] S109 uses the lower limit of the front axle torque capacity as the required torque for front axle distribution.

[0086] S110, when the rear axle TCS function is activated, determines the first inter-axle torque distribution coefficient based on the rear axle TCS requested torque, the lower limit of the rear axle torque capacity, the upper limit of the rear axle torque capacity, and the total required torque of the vehicle.

[0087] S111, the product of the total required torque and the first inter-shaft torque distribution coefficient is used as the third distribution torque, and the difference between the total required torque and the third distribution torque is used as the fourth distribution torque.

[0088] S112, determine whether the fourth distributed torque is greater than the lower limit of the front axle torque capacity. If yes, proceed to step S113; if no, proceed to step S114.

[0089] S113, take the minimum value between the fourth distribution torque and the upper limit of the front axle torque capacity as the front axle target torque, and take the rear axle requested torque as the rear axle target torque.

[0090] S114 uses the lower limit of the front axle torque capacity as the required torque for front axle allocation and the requested torque for rear axle as the target torque for rear axle.

[0091] S115, when the front axle TSC function is activated, the second inter-axle torque distribution coefficient is determined based on the total required torque, the front axle TSC requested torque, the lower limit of the rear axle torque capacity, and the upper limit of the torque capacity.

[0092] S116, the minimum value between the fifth distribution torque and the upper limit of the rear axle torque capacity is taken as the rear axle distribution demand torque.

[0093] S117, Determine whether the fifth distributed torque is less than the lower limit of the rear axle torque capacity. If yes, proceed to step S118; if no, proceed to step S119.

[0094] S118, the minimum value between the fifth distribution torque and the upper limit of the rear axle torque capacity is taken as the rear axle distribution demand torque, and the front axle request torque is taken as the front axle target torque.

[0095] S119 uses the lower limit of the rear axle torque capacity as the required torque for rear axle allocation and the requested torque of the front axle as the target torque of the front axle.

[0096] In summary, the vehicle drive anti-slip torque distribution method according to embodiments of the present invention obtains the activation states of the front axle TCS function and the rear axle TCS function; determines the inter-axle torque distribution coefficient based on the activation states of the front axle TCS function and the rear axle TCS function; determines the required torque for front axle distribution and the required torque for rear axle distribution based on the inter-axle torque distribution coefficient; and determines the target torque for front axle distribution and the target torque for rear axle distribution based on the activation states of the front axle TCS function, the activation states of the rear axle TCS function, the front axle distributed torque or the front axle requested torque, and the rear axle distributed torque or the rear axle requested torque. Therefore, this method can ensure that the total drive torque does not decrease to the greatest extent possible during the activation of the TCS drive anti-slip function, making the total drive torque as close as possible to the torque required by the driver, and reducing power loss.

[0097] Corresponding to the above embodiments, the present invention also proposes a vehicle.

[0098] like Figure 5 As shown, the vehicle 200 of this embodiment may include: a memory 210, a processor 220, and a program stored in the memory 210 and executable on the processor 220. When the processor 220 executes the program, it implements the above-described method for distributing anti-slip torque of the vehicle.

[0099] According to the vehicle of the present invention, by executing the above-described vehicle drive anti-slip torque distribution method, the total drive torque can be kept as close as possible to the driver's required torque during the activation of the TCS drive anti-slip function, thereby reducing power loss.

[0100] Corresponding to the above embodiments, the present invention also proposes a vehicle drive anti-slip torque distribution device.

[0101] like Figure 6 As shown, the vehicle drive anti-slip torque distribution device 100 of this embodiment includes: an acquisition module 110, a first determination module 120, a second determination module 130 and a third determination module 140.

[0102] The acquisition module 110 is used to acquire the activation status of the front axle TCS function and the rear axle TCS function of the vehicle. The first determination module 120 is used to determine the inter-axle torque distribution coefficient based on the activation status of the front axle TCS function and the rear axle TCS function. The second determination module 130 is used to determine the required torque for front axle distribution and the required torque for rear axle distribution based on the inter-axle torque distribution coefficient. The third determination module 140 is used to determine the target torque for front axle distribution and the target torque for rear axle distribution based on the activation status of the front axle TCS function, the activation status of the rear axle TCS function, the front axle distributed torque or the front axle requested torque, and the rear axle distributed torque or the rear axle requested torque.

[0103] According to one embodiment of the present invention, the first determining module 120 determines the inter-axle torque distribution coefficient based on the activation state of the front axle TCS function and the activation state of the rear axle TCS function. Specifically, it is used to: determine the inter-axle torque distribution coefficient as the original inter-axle torque distribution coefficient when both the front axle TCS function and the rear axle TCS function are inactive; wherein the original inter-axle torque distribution coefficient is determined based on the vehicle's economy and power performance; when the rear axle TCS function is active, determine the first inter-axle torque distribution coefficient based on the rear axle TSC requested torque, the lower limit of the rear axle torque capacity, the upper limit of the rear axle torque capacity, and the total required torque of the vehicle; and when the front axle TCS function is active, determine the second inter-axle torque distribution coefficient based on the total required torque, the front axle TCS requested torque, the lower limit of the rear axle torque capacity, and the upper limit of the rear axle torque capacity.

[0104] According to one embodiment of the present invention, the first determining module 120 determines a first inter-axle torque distribution coefficient based on the rear axle TSC requested torque, the lower limit of the rear axle torque capacity, the upper limit of the rear axle torque capacity, and the total required torque. Specifically, it is used to: when the rear axle TSC requested torque is greater than the lower limit of the rear axle torque capacity, use the ratio of the minimum value of the rear axle TSC requested torque and the upper limit of the rear axle torque capacity to the total required torque as the first inter-axle torque distribution coefficient; when the rear axle TSC requested torque is less than the lower limit of the rear axle torque capacity, use the ratio of the lower limit of the rear axle torque capacity to the total required torque as the first inter-axle torque distribution coefficient.

[0105] According to one embodiment of the present invention, the first determining module 120 determines a second inter-axle torque distribution coefficient based on the total required torque, the front axle TSC requested torque, the lower limit of the rear axle torque capacity, and the upper limit of the rear axle torque capacity. Specifically, it is used to: determine the torque difference between the total required torque and the front axle TSC requested torque; when the torque difference is greater than the lower limit of the rear axle torque capacity, use the ratio of the minimum value of the torque difference and the upper limit of the rear axle torque capacity to the total required torque as the second inter-axle torque distribution coefficient; when the torque difference is less than the lower limit of the rear axle torque capacity, use the ratio of the lower limit of the rear axle torque capacity to the total required torque as the second inter-axle torque distribution coefficient.

[0106] According to one embodiment of the present invention, the second determining module 130 determines the required torque for the front axle and the required torque for the rear axle based on the inter-axle torque distribution coefficient, specifically configured to: when the inter-axle torque distribution coefficient is the original inter-axle torque distribution coefficient, use the product of the total required torque and the original inter-axle torque distribution coefficient as the first distribution torque, and use the difference between the total required torque and the first distribution torque as the second distribution torque; when the first distribution torque is greater than the lower limit of the rear axle torque capacity, use the minimum value between the first distribution torque and the upper limit of the rear axle torque capacity as the required torque for the rear axle; when the first distribution torque is less than the lower limit of the rear axle torque capacity, use the lower limit of the rear axle torque capacity as the required torque for the rear axle; when the second distribution torque is greater than the lower limit of the front axle torque capacity, use the minimum value between the second distribution torque and the upper limit of the front axle torque capacity as the required torque for the front axle; when the second distribution torque is less than the lower limit of the front axle torque capacity, use the lower limit of the front axle torque capacity as the required torque for the front axle.

[0107] According to one embodiment of the present invention, the second determining module 130 determines the front axle distribution demand torque based on the inter-axle torque distribution coefficient, specifically configured to: when the inter-axle torque distribution coefficient is the first inter-axle torque distribution coefficient, use the product of the total demand torque and the first inter-axle torque distribution coefficient as the third distribution torque, and use the difference between the total demand torque and the third distribution torque as the fourth distribution torque; when the fourth distribution torque is greater than the lower limit of the front axle torque capacity, use the minimum value between the fourth distribution torque and the upper limit of the front axle torque capacity as the front axle distribution demand torque; when the fourth distribution torque is less than the lower limit of the front axle torque capacity, use the lower limit of the front axle torque capacity as the front axle distribution demand torque.

[0108] According to one embodiment of the present invention, the second determining module 130 determines the required torque for rear axle distribution based on the inter-axle torque distribution coefficient, specifically used for: when the inter-axle torque distribution coefficient is the second inter-axle torque distribution coefficient, taking the product of the total required torque and the second inter-axle torque distribution coefficient as the fifth distribution torque; when the fifth distribution torque is greater than the lower limit of the rear axle torque capacity, taking the minimum value between the fifth distribution torque and the upper limit of the rear axle torque capacity as the required torque for rear axle distribution; when the fifth distribution torque is less than the lower limit of the rear axle torque capacity, taking the lower limit of the rear axle torque capacity as the required torque for rear axle distribution.

[0109] According to one embodiment of the present invention, the third determining module 140 determines the front axle target torque and the rear axle target torque based on the activation state of the front axle TCS function, the activation state of the rear axle TCS function, the front axle allocated torque or the front axle requested torque, and the rear axle allocated torque or the rear axle requested torque. Specifically, it is used to: when both the front axle TCS function and the rear axle TCS function are inactive, use the front axle allocated torque as the front axle target torque and the rear axle allocated torque as the rear axle target torque; when both the front axle TCS function and the rear axle TCS function are active, use the front axle requested torque as the front axle target torque and the rear axle requested torque as the rear axle target torque; when the front axle TCS function is active and the rear axle TCS function is inactive, use the front axle requested torque as the front axle target torque and the rear axle allocated torque as the rear axle target torque; when the front axle TCS function is inactive and the rear axle TCS function is active, use the front axle allocated torque as the front axle target torque and the rear axle requested torque as the rear axle target torque.

[0110] It should be noted that for details not disclosed in the vehicle drive anti-slip torque distribution device of the present invention embodiments, please refer to the details disclosed in the vehicle drive anti-slip torque distribution method of the present invention embodiments, which will not be repeated here.

[0111] According to an embodiment of the present invention, a vehicle drive anti-slip torque distribution device includes an acquisition module for acquiring the activation state of the front axle TCS function and the rear axle TCS function; a first determining module for determining an inter-axle torque distribution coefficient based on the activation states of the front axle and rear axle TCS functions; a second determining module for determining the required torque for front axle distribution and the required torque for rear axle distribution based on the inter-axle torque distribution coefficient; and a third determining module for determining the target torque for the front axle and the target torque for the rear axle based on the activation states of the front axle and rear axle TCS functions, the front axle distributed torque or the requested torque for the front axle, and the rear axle distributed torque or the requested torque for the rear axle. Thus, this device can ensure that the total drive torque does not decrease to the greatest extent possible during the activation of the TCS drive anti-slip function, making the total drive torque as close as possible to the torque required by the driver, and reducing power loss.

[0112] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0113] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0114] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0115] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0116] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0117] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method of distributing drive slip torque for a vehicle, the method comprising: The method comprises: obtaining an activation state of a front axle TCS function and an activation state of a rear axle TCS function of the vehicle; determining an inter-axle torque distribution coefficient according to the activation state of the front axle TCS function and the activation state of the rear axle TCS function; determining a front axle distribution demand torque and a rear axle distribution demand torque based on the inter-axle torque distribution coefficient; determining a front axle target torque and a rear axle target torque according to the activation state of the front axle TCS function, the activation state of the rear axle TCS function, the front axle distribution torque or front axle request torque, the rear axle distribution torque or rear axle request torque; the determining of the inter-axle torque distribution coefficient according to the activation state of the front axle TCS function and the activation state of the rear axle TCS function comprises: in a case where the front axle TCS function and the rear axle TCS function are both in an inactivated state, determining the inter-axle torque distribution coefficient as an original inter-axle torque distribution coefficient; wherein the original inter-axle torque distribution coefficient is determined according to vehicle economy and power performance; in a case where the rear axle TCS function is in an activated state, determining a first inter-axle torque distribution coefficient according to a rear axle TSC request torque, a rear axle torque capability lower limit, a rear axle torque capability upper limit and a total demand torque of the vehicle; in a case where the front axle TSC function is in an activated state, determining a second inter-axle torque distribution coefficient according to the total demand torque, a front axle TSC request torque, the rear axle torque capability lower limit and the rear axle torque capability upper limit; the determining of the front axle target torque and the rear axle target torque according to the activation state of the front axle TCS function, the activation state of the rear axle TCS function, the front axle distribution torque or front axle request torque, the rear axle distribution torque or rear axle request torque comprises: in a case where the front axle TCS function and the rear axle TCS function are both in an inactivated state, taking the front axle distribution torque as the front axle target torque and taking the rear axle distribution torque as the rear axle target torque; in a case where the front axle TCS function and the rear axle TCS function are both in an activated state, taking the front axle request torque as the front axle target torque and taking the rear axle request torque as the rear axle target torque; in a case where the front axle TCS function is in an activated state and the rear axle TCS function is in an inactivated state, taking the front axle request torque as the front axle target torque and taking the rear axle distribution torque as the rear axle target torque; in a case where the front axle TCS function is in an inactivated state and the rear axle TCS function is in an activated state, taking the front axle distribution torque as the front axle target torque and taking the rear axle request torque as the rear axle target torque.

2. The drive slip torque distribution method for a vehicle according to claim 1, characterized by, the determining of the first inter-axle torque distribution coefficient according to the rear axle TSC request torque, the rear axle torque capability lower limit, the rear axle torque capability upper limit and the total demand torque comprises: in a case where the rear axle TSC request torque is greater than the rear axle torque capability lower limit, taking a ratio of a minimum value of the rear axle TSC request torque and the rear axle torque capability upper limit to the total demand torque as the first inter-axle torque distribution coefficient; When the rear axle TSC requested torque is less than the rear axle torque capability lower limit, a ratio of the rear axle torque capability lower limit to the total demand torque is taken as the first inter-axle torque distribution coefficient.

3. The drive slip torque distribution method of a vehicle according to claim 1, characterized by, The determining a second inter-axle torque distribution coefficient according to the total demand torque, front axle TSC requested torque, rear axle torque capability lower limit and rear axle torque capability upper limit comprises: determining a torque difference between the total demand torque and the front axle TSC requested torque; when the torque difference is greater than the rear axle torque capability lower limit, taking a ratio of the minimum value of the torque difference and the rear axle torque capability upper limit to the total demand torque as the second inter-axle torque distribution coefficient; when the torque difference is less than the rear axle torque capability lower limit, taking a ratio of the rear axle torque capability lower limit to the total demand torque as the second inter-axle torque distribution coefficient.

4. The drive slip torque distribution method of a vehicle according to claim 1, characterized by, The determining a front axle distribution demand torque and a rear axle distribution demand torque based on the inter-axle torque distribution coefficient comprises: when the inter-axle torque distribution coefficient is the original inter-axle torque distribution coefficient, taking a product of the total demand torque and the original inter-axle torque distribution coefficient as a first distribution torque, and taking a difference between the total demand torque and the first distribution torque as a second distribution torque; when the first distribution torque is greater than the rear axle torque capability lower limit, taking the minimum value of the first distribution torque and the rear axle torque capability upper limit as the rear axle distribution demand torque; when the first distribution torque is less than the rear axle torque capability lower limit, taking the rear axle torque capability lower limit as the rear axle distribution demand torque; when the second distribution torque is greater than the front axle torque capability lower limit, taking the minimum value of the second distribution torque and the front axle torque capability upper limit as the front axle distribution demand torque; when the second distribution torque is less than the front axle torque capability lower limit, taking the front axle torque capability lower limit as the front axle distribution demand torque.

5. The drive slip torque distribution method of a vehicle according to claim 1, characterized by, The determining a front axle distribution demand torque based on the inter-axle torque distribution coefficient comprises: when the inter-axle torque distribution coefficient is the first inter-axle torque distribution coefficient, taking a product of the total demand torque and the first inter-axle torque distribution coefficient as a third distribution torque, and taking a difference between the total demand torque and the third distribution torque as a fourth distribution torque; when the fourth distribution torque is greater than the front axle torque capability lower limit, taking the minimum value of the fourth distribution torque and the front axle torque capability upper limit as the front axle distribution demand torque; when the fourth distribution torque is less than the front axle torque capability lower limit, taking the front axle torque capability lower limit as the front axle distribution demand torque.

6. The drive slip torque distribution method of a vehicle according to claim 1, characterized by, The determining a rear axle distribution demand torque based on the inter-axle torque distribution coefficient comprises: when the inter-axle torque distribution coefficient is the second inter-axle torque distribution coefficient, taking a product of the total demand torque and the second inter-axle torque distribution coefficient as a fifth distribution torque; in a case where the fifth distribution torque is greater than the rear axle torque capacity lower limit, taking a minimum value of the fifth distribution torque and the rear axle torque capacity upper limit as the rear axle distribution demand torque; in a case where the fifth distribution torque is less than the rear axle torque capacity lower limit, taking the rear axle torque capacity lower limit as the rear axle distribution demand torque.

7. A vehicle characterized by comprising: comprise: a memory, a processor, and a program stored in the memory and capable of running on the processor, and the processor implements the vehicle drive anti-skid torque distribution method according to any one of claims 1-6 when the program is executed.

8. A drive slip torque distribution device for a vehicle, adapted to be controlled by the drive slip torque distribution method for a vehicle according to any one of claims 1 to 6, characterized by The device comprises: an acquisition module, configured to acquire an activation state of a front axle TCS function and an activation state of a rear axle TCS function of the vehicle; a first determination module, configured to determine an inter-axle torque distribution coefficient according to the activation state of the front axle TCS function and the activation state of the rear axle TCS function; a second determination module, configured to determine a front axle distribution demand torque and a rear axle distribution demand torque based on the inter-axle torque distribution coefficient; a third determination module, configured to determine a front axle target torque and a rear axle target torque according to the activation state of the front axle TCS function, the activation state of the rear axle TCS function, the front axle distribution torque or a front axle request torque, and the rear axle distribution torque or a rear axle request torque.

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