Vehicle, torque distribution method and device thereof and storage medium

Abstract

The invention discloses a vehicle, a torque distribution method and device thereof and a storage medium. The torque distribution method comprises the steps of obtaining working condition information of a vehicle in real time; the working condition information comprises the actual mass of the vehicle, the actual gradient of a vehicle driving road, the longitudinal acceleration of the vehicle, the speed of the vehicle and the required torque of a driver; determining a current torque distribution coefficient of the vehicle according to the current working condition information of the vehicle; and according to the current torque distribution coefficient and the current demand torque of the driver, the current middle axle torque and the current rear axle torque of the vehicle are determined respectively. According to the technical scheme, the running economy, safety and stability of the vehicle are improved.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicle electronic control technology, and in particular to a vehicle and a torque distribution method, device and storage medium thereof. Background Art

[0002] Advances in new energy vehicle technology have led to the rapid development of vehicle electrification. For distributed drive vehicles, the quality of inter-axle torque control determines the vehicle's economy and power, and also affects the driving experience. Currently, mass-produced four-wheel drive electric vehicles typically use a single indicator or a fixed ratio to distribute the front and rear axle motor drive torque. This fails to meet the driver's driving needs for economy or power. Therefore, a vehicle torque distribution method is urgently needed that automatically distributes inter-axle torque according to the vehicle's driving conditions while ensuring that the torque required by the driver is met, thereby meeting the driver's needs for power and economy. Summary of the Invention

[0003] The present invention provides a vehicle and a torque distribution method, device and storage medium thereof, which automatically distributes the inter-axle torque of the vehicle by acquiring various operating condition information of the vehicle, thereby improving the operating economy, safety and stability of the vehicle.

[0004] According to a first aspect of the present invention, a torque distribution method for a vehicle is provided, comprising:

[0005] Acquiring vehicle operating condition information in real time; the operating condition information includes the actual mass of the vehicle, the actual slope of the road on which the vehicle is traveling, the longitudinal acceleration of the vehicle, the speed of the vehicle, and the driver's required torque;

[0006] determining a current torque distribution coefficient of the vehicle according to current operating condition information of the vehicle;

[0007] A current central axle torque and a current rear axle torque of the vehicle are determined according to the current torque distribution coefficient and the current torque demanded by the driver.

[0008] Optionally, determining a current torque distribution coefficient of the vehicle according to current operating condition information of the vehicle includes:

[0009] determining, based on current operating condition information of the vehicle, whether the vehicle satisfies a power activation condition;

[0010] When the current operating condition information of the vehicle meets the dynamic activation condition, the current torque distribution coefficient of the vehicle is determined according to the current actual mass of the vehicle, the current longitudinal acceleration of the vehicle, and the current actual slope of the driving road.

[0011] Optionally, the dynamic activation condition includes: the actual mass is greater than a mass threshold, the actual slope is greater than a slope threshold, the longitudinal acceleration is greater than an acceleration threshold, and the required torque is greater than a torque threshold.

[0012] Optionally, when the vehicle satisfies the dynamic activation condition, determining a current torque distribution coefficient of the vehicle according to a current actual mass of the vehicle, a current longitudinal acceleration of the vehicle, and a current actual slope of the driving road includes:

[0013] When the vehicle satisfies the dynamic activation condition, determining a current load state of the vehicle according to a current actual mass of the vehicle;

[0014] Determining a current coefficient mapping relationship of the vehicle according to the current load state; the coefficient mapping relationship includes a mapping relationship between the longitudinal acceleration and the actual slope and a torque distribution coefficient;

[0015] According to the current longitudinal acceleration and the current actual slope, a torque distribution coefficient corresponding to the current longitudinal acceleration and the current actual slope in the current coefficient mapping relationship is determined as the current torque distribution coefficient.

[0016] Optionally, determining the current load state of the vehicle according to the current actual mass of the vehicle includes:

[0017] When the current actual mass of the vehicle is less than a first preset mass, determining that the current load state of the vehicle is a light load state;

[0018] When the current actual mass of the vehicle is greater than or equal to the first preset mass and less than a second preset mass, determining that the current load state of the vehicle is a medium load state;

[0019] When the current actual mass of the vehicle is greater than or equal to the second preset mass, it is determined that the current load state of the vehicle is a heavy load state.

[0020] Optionally, the load state of the vehicle includes a light load state, a medium load state, and a heavy load state; the coefficient mapping relationship includes a first coefficient mapping relationship, a second coefficient mapping relationship, and a third coefficient mapping relationship;

[0021] Determining a current coefficient mapping relationship of the vehicle according to the current load state includes:

[0022] When the current load state is a light load state, determining the current coefficient mapping relationship of the vehicle to be a first coefficient mapping relationship;

[0023] When the current load state is a medium load state, determining the current coefficient mapping relationship of the vehicle to be a second coefficient mapping relationship;

[0024] When the current load state is a heavy load state, determining the current coefficient mapping relationship of the vehicle to be a third coefficient mapping relationship;

[0025] Among them, under the same longitudinal acceleration and the same road slope, the torque distribution coefficient determined based on the first coefficient mapping relationship is smaller than the torque distribution coefficient determined based on the second number mapping relationship, and the dynamic torque distribution coefficient determined based on the second number mapping relationship is smaller than the torque distribution coefficient determined based on the third number mapping relationship.

[0026] Optionally, determining a current torque distribution coefficient of the vehicle according to current operating condition information of the vehicle further includes:

[0027] When the current operating condition information of the vehicle does not meet the power activation condition, a current torque distribution coefficient of the vehicle is determined according to the current vehicle speed and the current torque requirement of the driver.

[0028] Optionally, determining the current center axle torque and the current rear axle torque of the vehicle respectively according to the current torque distribution coefficient and the current torque demanded by the driver includes:

[0029] determining the current intermediate shaft torque by multiplying the current torque distribution coefficient by the current required torque;

[0030] determining a current rear axle torque coefficient according to the current torque distribution coefficient;

[0031] The product of the current rear axle torque coefficient and the current required torque is determined as the current rear axle torque.

[0032] Optionally, the vehicle torque distribution method further includes:

[0033] Obtaining a maximum rear axle torque of the vehicle;

[0034] When the current rear axle torque is greater than the maximum rear axle torque, determining a middle axle torque compensation value according to a current rear axle torque difference between the current rear axle torque and the maximum rear axle torque;

[0035] The current mid-axle torque is compensated according to the mid-axle torque compensation value.

[0036] Optionally, the vehicle torque distribution method further includes:

[0037] Obtaining a maximum mid-axle torque of the vehicle;

[0038] When the current middle axle torque is greater than the maximum middle axle torque, determining a rear axle torque compensation value according to a current middle axle torque difference between the current middle axle torque and the maximum middle axle torque;

[0039] The current rear axle torque is compensated according to the rear axle torque compensation value.

[0040] According to a second aspect of the present invention, there is provided a torque distribution device for a vehicle, comprising:

[0041] An operating condition information acquisition module is used to acquire the vehicle's operating condition information in real time; the operating condition information includes the actual mass of the vehicle, the actual slope of the road on which the vehicle is traveling, the longitudinal acceleration of the vehicle, the speed of the vehicle, and the driver's required torque;

[0042] a distribution coefficient determination module, configured to determine a current torque distribution coefficient of the vehicle based on current operating condition information of the vehicle;

[0043] The torque determination module is configured to determine a current central axle torque and a current rear axle torque of the vehicle according to the current torque distribution coefficient and the current torque demanded by the driver.

[0044] According to a third aspect of the present invention, a computer-readable storage medium is provided, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the torque distribution method for a vehicle as described in any one of the first aspects.

[0045] According to a fourth aspect of the present invention, a vehicle is provided, comprising: a vehicle controller; the vehicle controller is configured to execute the vehicle torque distribution method according to any one of the first aspects.

[0046] The technical solution of the present invention obtains the vehicle's operating condition information and determines the torque distribution coefficient based on the vehicle's operating condition information, so as to determine the vehicle's center axle torque and rear axle torque respectively according to the torque distribution coefficient and the required torque, so as to reasonably distribute the vehicle's center axle torque and rear axle torque, thereby improving the vehicle's operating economy, safety and stability.

[0047] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to make the technical solution in the embodiments of the present application clearer, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0049] Figure 1 A flowchart of a torque distribution method of a vehicle according to an embodiment of the present application is shown in FIG. 1.

[0050] Figure 2 A flowchart of a torque distribution method of a vehicle according to an embodiment of the present application is shown in FIG. 1.

[0051] Figure 3 A flowchart of a torque distribution method of a vehicle according to an embodiment of the present application is shown in FIG. 1.

[0052] Figure 4 A flowchart of a torque distribution method of a vehicle according to an embodiment of the present application is shown in FIG. 1.

[0053] Figure 5 A structure diagram of a torque distribution device of a vehicle according to an embodiment of the present application is shown in FIG. 1. DETAILED DESCRIPTION

[0054] In order to make the technical solution in the embodiments of the present application clearer, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0055] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to include only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0056] Embodiment 1

[0057] Figure 1 A flowchart of a torque distribution method of a vehicle is provided for an embodiment of the present application, as shown in Figure 1 The torque distribution method of the vehicle includes:

[0058] S101, real-time acquisition of working condition information of the vehicle.

[0059] The working condition information includes actual mass of the vehicle, actual slope of the road on which the vehicle travels, longitudinal acceleration of the vehicle, vehicle speed, and demand torque of the driver.

[0060] Specifically, the existing new energy vehicle can generally include three shafts, namely front shaft, middle shaft and rear shaft, wherein the front shaft is a non-driving shaft, and the middle shaft and the rear shaft are driving shafts. If the torque distribution in the middle shaft and the rear shaft of the vehicle is uneven during the driving process of the vehicle, it will directly affect the running stability, controllability and mechanical life of the vehicle. The torque of the vehicle is generally related to the working condition information during the driving process of the vehicle, so it is necessary to acquire the working condition information of the vehicle in real time during the driving process of the vehicle.

[0061] Exemplarily, a slope sensor, an acceleration sensor, a speed sensor, etc. can be arranged in the vehicle to acquire the actual slope of the road on which the vehicle travels, the longitudinal acceleration of the vehicle, and the vehicle speed in real time. In addition, the actual torque during the driving process of the vehicle can be obtained by the motor, and the actual mass of the vehicle can be estimated according to the obtained actual torque of the vehicle and the acceleration of the vehicle, and the demand torque of the driver can be obtained according to the sensor on the accelerator pedal of the vehicle.

[0062] S102, determining a current torque distribution coefficient of the vehicle according to the current working condition information of the vehicle.

[0063] Specifically, according to the current working condition information of the vehicle, when the actual mass of the vehicle is larger and the vehicle is in the climbing or accelerating stage, it indicates that the vehicle needs more power during the driving process, at this time, the current torque distribution coefficient of the vehicle needs to be adjusted, so that the torque distribution corresponding to the rear shaft of the vehicle is larger, thereby meeting the requirement of the vehicle for power performance. When the actual mass of the vehicle is lighter, or the vehicle is in the downhill or deceleration braking stage, at this time, the torque distribution coefficient corresponding to the front shaft of the vehicle needs to be increased, so that the vehicle runs more economically.

[0064] S103, determining a current middle shaft torque and a current rear shaft torque of the vehicle respectively according to the current torque distribution coefficient and the current demand torque of the driver.

[0065] Specifically, the current middle shaft torque and the current rear shaft torque of the vehicle are related to the current torque distribution coefficient of the vehicle and the current demand torque of the driver. During the operation of the vehicle, the current torque distribution coefficient of the vehicle can be automatically adjusted according to the current working condition information of the vehicle, and the current demand torque of the driver can be obtained in real time according to the accelerator pedal, so that the current middle shaft torque and the current rear shaft torque of the vehicle can be distributed in real time according to the current torque distribution coefficient and the current demand torque of the driver, thereby meeting the driving demand of the vehicle and improving the economy of the vehicle.

[0066] The embodiment obtains the working condition information of the vehicle, determines the torque distribution coefficient according to the working condition information of the vehicle, determines the middle shaft torque and the rear shaft torque of the vehicle according to the torque distribution coefficient and the demand torque, so that the middle shaft torque and the rear shaft torque of the vehicle can be reasonably distributed, and the economy, safety and stability of the vehicle can be improved.

[0067] Embodiment Two

[0068] Figure 2 A flowchart of a torque distribution method of a vehicle is provided for the second embodiment of the application. Based on the above-mentioned embodiment, the current torque distribution coefficient of the vehicle is determined according to the current working condition information of the vehicle, and accordingly, as shown in Figure 2 The torque distribution method of the vehicle can include the following steps.

[0069] S201, obtaining the working condition information of the vehicle in real time.

[0070] S202, determining whether the vehicle meets the power activation condition according to the current working condition information of the vehicle; if yes, performing S203; if no, performing S204.

[0071] Specifically, in order to enhance the driving experience of the vehicle and improve the economy and power of the vehicle, the torque distribution method of the vehicle is divided into a power distribution method and an economy distribution method in the embodiment of the application, and the vehicle will obtain greater driving force in the power distribution method than in the economy distribution method. In the economy distribution method, the running economy of the vehicle is given priority.

[0072] The power activation condition includes that the actual mass is greater than a mass threshold, the actual slope is greater than a slope threshold, the longitudinal acceleration is greater than an acceleration threshold, and the demand torque is greater than a torque threshold.

[0073] After obtaining the vehicle's actual mass, actual slope, longitudinal acceleration, and required torque, they are compared with corresponding thresholds. If any of these values ​​is greater than the set threshold, it indicates that the vehicle requires higher power. Therefore, to meet the vehicle's driving needs, the vehicle must allocate the torque distribution coefficient using the power distribution method. It should be noted that the corresponding torque distribution coefficient method for vehicles under the power distribution method and the economic distribution method is different.

[0074] S203 : Determine a current torque distribution coefficient of the vehicle according to the current actual mass of the vehicle, the current longitudinal acceleration of the vehicle, and the current actual slope of the driving road.

[0075] Specifically, when the dynamic activation conditions are met, the vehicle requires a higher driving force. At this time, the vehicle operating conditions can be calibrated in advance to form a mapping relationship between the torque distribution coefficient and the current actual mass of the vehicle, the current longitudinal acceleration of the vehicle, and the current actual slope of the driving road. The mapping relationship can be a mapping chart or a mapping relationship. Therefore, during the actual operation of the vehicle, the optimal current torque distribution coefficient of the vehicle can be determined by looking up the table according to the current actual mass of the vehicle, the current longitudinal acceleration of the vehicle, and the current actual slope of the driving road, so as to achieve higher work efficiency while meeting the power requirements.

[0076] In an optional embodiment, the method for determining the current torque distribution coefficient may include: when the vehicle meets the dynamic activation condition, determining the current load state of the vehicle based on the current actual mass of the vehicle; based on the current load state, determining the current coefficient mapping relationship of the vehicle; the coefficient mapping relationship includes a mapping relationship between longitudinal acceleration and actual slope and the torque distribution coefficient; based on the current longitudinal acceleration and the current actual slope, determining the torque distribution coefficient corresponding to the current longitudinal acceleration and the current actual slope in the current coefficient mapping relationship as the current torque distribution coefficient.

[0077] Specifically, because the center of gravity and tire adhesion of a vehicle vary under different load states, the vehicle's load state can be categorized as light, medium, and heavy. Specifically, when the vehicle's current actual mass is less than a first preset mass, the vehicle's current load state is determined to be light; when the vehicle's current actual mass is greater than or equal to the first preset mass and less than a second preset mass, the vehicle's current load state is determined to be medium; and when the vehicle's current actual mass is greater than or equal to the second preset mass, the vehicle's current load state is determined to be heavy.

[0078] Since the vehicle is in heavy load state, the weight of the vehicle is concentrated in the middle and rear of the vehicle, at this time the load of the rear axle of the vehicle is significantly increased, the adhesion of the rear axle and the bottom is stronger, therefore, at this time the torque distribution coefficient of the rear axle is adjusted to increase the torque distribution of the rear axle, so as to more efficiently convert the power into driving force and avoid the vehicle from slipping; when it is determined that the vehicle is in light load state, at this time the center of gravity of the vehicle is close to the cab, resulting in relatively larger load of the middle axle of the vehicle, at this time the torque distribution coefficient of the middle axle is adjusted to avoid waste of the power of the rear axle and improve the economy of the vehicle; when it is determined that the vehicle is in medium load state, at this time the torque distribution coefficient between the middle axle and the rear axle of the vehicle is dynamically adjusted to maximize the economy and power of the vehicle.

[0079] In an optional embodiment, when the current load state is a light load state, the current coefficient mapping relationship of the vehicle is determined as a first coefficient mapping relationship; when the current load state is a medium load state, the current coefficient mapping relationship of the vehicle is determined as a second coefficient mapping relationship; when the current load state is a heavy load state, the current coefficient mapping relationship of the vehicle is determined as a third coefficient mapping relationship. Wherein, under the same longitudinal acceleration and the same road slope, the torque distribution coefficient determined based on the first coefficient mapping relationship is smaller than the torque distribution coefficient determined based on the second coefficient mapping relationship, and the power torque distribution coefficient determined based on the second coefficient mapping relationship is smaller than the torque distribution coefficient determined based on the third coefficient mapping relationship.

[0080] In an optional embodiment, when the current load state is a light load state, the current coefficient mapping relationship of the vehicle is determined as a first coefficient mapping relationship; when the current load state is a medium load state, the current coefficient mapping relationship of the vehicle is determined as a second coefficient mapping relationship; when the current load state is a heavy load state, the current coefficient mapping relationship of the vehicle is determined as a third coefficient mapping relationship. Wherein, under the same longitudinal acceleration and the same road slope, the torque distribution coefficient determined based on the first coefficient mapping relationship is smaller than the torque distribution coefficient determined based on the second coefficient mapping relationship, and the power torque distribution coefficient determined based on the second coefficient mapping relationship is smaller than the torque distribution coefficient determined based on the third coefficient mapping relationship.

[0081] After determining the mapping relationship between the vehicle's longitudinal acceleration and actual slope and the torque distribution coefficient, the torque distribution coefficient corresponding to the current longitudinal acceleration and the current actual slope in the current coefficient mapping relationship can be determined as the current torque distribution coefficient based on the current longitudinal acceleration and the current actual slope. Specifically, when the vehicle is lightly loaded, the first coefficient mapping relationship is used to search for the corresponding torque distribution coefficient based on the vehicle's current longitudinal acceleration and the current actual slope. Similarly, when the vehicle is moderately loaded, the second coefficient mapping relationship is used to search for the corresponding torque distribution coefficient based on the vehicle's current longitudinal acceleration and the current actual slope. When the vehicle is heavily loaded, the third coefficient mapping relationship is used to search for the corresponding torque distribution coefficient based on the vehicle's current longitudinal acceleration and the current actual slope.

[0082] S204 : Determine a current torque distribution coefficient of the vehicle according to the current vehicle speed and the current torque requirement of the driver.

[0083] Specifically, when the vehicle's actual mass is less than or equal to a mass threshold, the actual slope is less than or equal to a slope threshold, the longitudinal acceleration is less than or equal to an acceleration threshold, and the requested torque is less than or equal to a torque threshold, the vehicle's current operating condition does not meet the dynamic activation conditions. Therefore, the torque distribution coefficient must be determined using an economical distribution method. Similarly, under the economical distribution method, a mapping relationship between the vehicle's speed and the driver's requested torque and the torque distribution coefficient can also be obtained through calibration. This mapping relationship enables the vehicle to achieve maximum economy and dynamic performance under economical distribution conditions. Furthermore, when the vehicle is actually under economical distribution conditions, the torque distribution coefficients for the vehicle's center and rear axles can be determined using a table lookup method, that is, by using the mapping relationship obtained during the calibration process and the vehicle's current speed and the driver's current requested torque.

[0084] S205 : Determine the current center axle torque and the current rear axle torque of the vehicle according to the current torque distribution coefficient and the current torque demanded by the driver.

[0085] The embodiment determines the mapping relationship between the longitudinal acceleration of the vehicle, the actual slope and the torque distribution coefficient according to the load state of the vehicle when the vehicle meets the power activation condition, that is, the mapping relationship between the longitudinal acceleration of the vehicle, the actual slope and the torque distribution coefficient is the first mapping relationship in the light load state, the second mapping relationship in the medium load state and the third mapping relationship in the heavy load state, and the current torque distribution coefficient is further determined according to the current longitudinal acceleration and the current actual slope of the vehicle under the corresponding mapping relationship. In this way, the torque distribution coefficient is dynamically adjusted, so that the power of the vehicle can always match the actual driving demand, and the traction and economy are taken into account at the same time. In addition, when the vehicle does not meet the power activation condition, the current torque distribution coefficient of the vehicle is determined according to the current vehicle speed and the current demand torque of the driver, so that the vehicle can run more economically when the vehicle does not need large driving force.

[0086] Embodiment three

[0087] Figure 3 A flowchart of a torque distribution method of a vehicle provided by the third embodiment of the application is shown in the figure. The embodiment is based on the above-mentioned embodiments, and the current intermediate shaft torque and the current rear axle torque of the vehicle are determined according to the current torque distribution coefficient and the current demand torque of the driver, and the corresponding torque distribution method of the vehicle of the embodiment can include: Figure 3 as shown in the figure, the torque distribution method of the vehicle of the embodiment can include:

[0088] S301, real-time acquisition of working condition information of the vehicle.

[0089] S302, determining the current torque distribution coefficient of the vehicle according to the current working condition information of the vehicle.

[0090] S303, determining the product of the current torque distribution coefficient and the current demand torque as the current intermediate shaft torque.

[0091] S304, determining the current rear axle torque coefficient according to the current torque distribution coefficient.

[0092] S305, determining the product of the current rear axle torque coefficient and the current demand torque as the current rear axle torque.

[0093] Specifically, after determining the current torque distribution coefficient of the vehicle, the product of the current torque distribution coefficient and the current demand torque is determined as the current intermediate shaft torque, which is sent to the intermediate shaft drive controller, and the intermediate shaft drive controller can control the operating state of the intermediate shaft drive mechanism of the vehicle according to the current intermediate shaft torque. Since the torque distribution coefficient represents the percentage of the intermediate shaft torque in the total torque of the vehicle, when calculating the rear axle torque distribution coefficient, only the total torque coefficient (1) of the vehicle is subtracted from the intermediate shaft torque distribution coefficient, and the product of the obtained current rear axle torque coefficient and the current demand torque is taken as the current rear axle torque, which is sent to the corresponding rear axle drive controller, and the rear axle drive controller can control the operating state of the rear axle drive mechanism of the vehicle according to the current rear axle torque.

[0094] The embodiment reasonably distributes the intermediate shaft torque and the rear axle torque of the vehicle by taking the product of the intermediate shaft torque distribution coefficient and the rear axle torque distribution coefficient and the demand torque as the intermediate shaft torque and the rear axle torque of the vehicle, thereby improving the economy and power of the vehicle.

[0095] Embodiment Four

[0096] Figure 4 A flowchart of a torque distribution method of a vehicle provided for the fourth embodiment of the application, the embodiment is based on the above-mentioned embodiments, and the compensation of the intermediate shaft torque and the rear axle torque is described in detail, and accordingly, as shown in Figure 4 The torque distribution method of the vehicle of the embodiment can include:

[0097] S401, real-time acquisition of working condition information of the vehicle.

[0098] S402, determining the current torque distribution coefficient of the vehicle according to the current working condition information of the vehicle.

[0099] S403, determining the product of the current torque distribution coefficient and the current demand torque as the current intermediate shaft torque.

[0100] S404, determining the current rear axle torque coefficient according to the current torque distribution coefficient.

[0101] S405, determining the product of the current rear axle torque coefficient and the current demand torque as the current rear axle torque.

[0102] S406, acquisition of the maximum rear axle torque of the vehicle.

[0103] Specifically, a vehicle's mechanical design, material strength, thermal management, and electronic control strategy all affect its maximum rear axle torque. If the vehicle's current rear axle torque exceeds its maximum rear axle torque, it can cause a range of mechanical damage, safety risks, or performance issues, such as drivetrain fracture, loss of control during straight-line acceleration, and overheating and aging. Therefore, it is important to avoid situations where the vehicle's current rear axle torque exceeds its maximum rear axle torque.

[0104] S407 : When the current rear axle torque is greater than the maximum rear axle torque, determine a middle axle torque compensation value according to a current rear axle torque difference between the current rear axle torque and the maximum rear axle torque.

[0105] S408 : Compensate the current mid-axle torque according to the mid-axle torque compensation value.

[0106] Specifically, if the vehicle is overloaded or accelerating, and the rear axle needs to increase the driving force, the current rear axle torque may be greater than the maximum rear axle torque. At this time, in order to avoid danger, the excess torque value of the rear axle needs to be transferred to the middle axle, that is, the current rear axle torque difference between the current rear axle torque and the maximum rear axle torque is determined as the middle axle torque compensation value, and the middle axle torque compensation value is compensated to the current middle axle torque, so as to reduce the rear axle torque and increase the middle axle torque, so that the total torque of the vehicle meets the vehicle's power requirements.

[0107] S409: Obtain the maximum center axle torque of the vehicle.

[0108] S410 : When the current middle axle torque is greater than the maximum middle axle torque, determine a rear axle torque compensation value according to a current middle axle torque difference between the current middle axle torque and the maximum middle axle torque.

[0109] S411 . Compensate the current rear axle torque according to the rear axle torque compensation value.

[0110] Similarly, the vehicle's center axle also has a maximum torque. If the vehicle's current center axle torque is greater than the maximum center axle torque, driving risks will also occur. Therefore, the rear axle torque compensation value is determined by the current center axle torque difference between the current center axle torque and the maximum center axle torque, and the rear axle torque compensation value is added to the current rear axle torque as the final rear axle torque.

[0111] This embodiment avoids the danger caused by the current rear axle torque and central axle torque being greater than the maximum rear axle torque and central axle torque by obtaining the maximum rear axle and central axle torque of the vehicle, and compensates the excess rear axle torque to the central axle torque, and compensates the excess central axle torque to the rear axle torque, thereby ensuring that the total torque of the vehicle can meet the vehicle's power requirements and improving the safety of the vehicle.

[0112] Example 5

[0113] Figure 5 Fig. 5 is a structural schematic diagram of a torque distribution device of a vehicle according to an embodiment of the present application, which can implement the torque distribution method of the vehicle according to the embodiment of the present application. As shown in the figure, the device comprises a working condition information acquisition module 10, a distribution coefficient determination module 20 and a torque determination module 30. The specific structure of the device is as follows: Figure 5

[0114] The working condition information acquisition module 10 is configured to acquire the working condition information of the vehicle in real time. The working condition information comprises the actual mass of the vehicle, the actual slope of the road on which the vehicle travels, the longitudinal acceleration of the vehicle, the vehicle speed of the vehicle, and the demand torque of the driver.

[0115] The distribution coefficient determination module 20 is configured to determine the current torque distribution coefficient of the vehicle according to the current working condition information of the vehicle.

[0116] The torque determination module 30 is configured to determine the current central axis torque and the current rear axle torque of the vehicle according to the current torque distribution coefficient and the current demand torque of the driver, respectively.

[0117] In an optional embodiment of the present application, the distribution coefficient determination module 20 can be specifically configured to: determine whether the vehicle satisfies the power activation condition according to the current working condition information of the vehicle; and determine the current torque distribution coefficient of the vehicle according to the current actual mass of the vehicle, the current longitudinal acceleration of the vehicle, and the current actual slope of the road when the current working condition information of the vehicle satisfies the power activation condition.

[0118] In an optional embodiment of the present application, the working condition information acquisition module 10 can be specifically configured to: determine that the actual mass is greater than a mass threshold value, the actual slope is greater than a slope threshold value, the longitudinal acceleration is greater than an acceleration threshold value, and the demand torque is greater than a torque threshold value.

[0119] In another optional embodiment of the present application, the distribution coefficient determination module 20 can be specifically configured to: determine the current load state of the vehicle according to the current actual mass of the vehicle when the vehicle satisfies the power activation condition; determine the current coefficient mapping relationship of the vehicle according to the current load state; the coefficient mapping relationship comprises the mapping relationship between the longitudinal acceleration and the actual slope and the torque distribution coefficient; and determine the torque distribution coefficient corresponding to the current longitudinal acceleration and the current actual slope in the current coefficient mapping relationship as the current torque distribution coefficient according to the current longitudinal acceleration and the current actual slope.

[0120] ​In another optional embodiment of the present invention, the distribution coefficient determination module 20 can also be specifically used to: when the current actual mass of the vehicle is less than the first preset mass, determine that the current load state of the vehicle is a light load state; when the current actual mass of the vehicle is greater than or equal to the first preset mass and less than the second preset mass, determine that the current load state of the vehicle is a medium load state; when the current actual mass of the vehicle is greater than or equal to the second preset mass, determine that the current load state of the vehicle is a heavy load state.

[0121] In another optional embodiment of the present invention, the distribution coefficient determination module 20 can also be specifically used to: when the current load state is a light load state, determine that the current coefficient mapping relationship of the vehicle is a first coefficient mapping relationship; when the current load state is a medium load state, determine that the current coefficient mapping relationship of the vehicle is a second coefficient mapping relationship; when the current load state is a heavy load state, determine that the current coefficient mapping relationship of the vehicle is a third coefficient mapping relationship; wherein, under the same longitudinal acceleration and the same road surface slope, the torque distribution coefficient determined based on the first coefficient mapping relationship is smaller than the torque distribution coefficient determined based on the second coefficient mapping relationship, and the dynamic torque distribution coefficient determined based on the second coefficient mapping relationship is smaller than the torque distribution coefficient determined based on the third coefficient mapping relationship.

[0122] In another optional embodiment of the present invention, the distribution coefficient determination module 20 can also be specifically used to determine the vehicle's current torque distribution coefficient based on the vehicle's current speed and the driver's current required torque when the vehicle's current operating condition information does not meet the dynamic activation conditions.

[0123] In an optional embodiment of the present invention, the torque determination module 30 can be specifically used to: determine the product of the current torque distribution coefficient and the current required torque as the current central axle torque; determine the current rear axle torque coefficient based on the current torque distribution coefficient; and determine the product of the current rear axle torque coefficient and the current required torque as the current rear axle torque.

[0124] In another optional embodiment of the present invention, the torque determination module 30 can also be specifically used to: obtain the maximum rear axle torque of the vehicle; when the current rear axle torque is greater than the maximum rear axle torque, determine the middle axle torque compensation value according to the current rear axle torque difference between the current rear axle torque and the maximum rear axle torque; and compensate the current middle axle torque according to the middle axle torque compensation value.

[0125] In another optional embodiment of the present invention, the torque determination module 30 can also be specifically used to: obtain the maximum mid-axle torque of the vehicle; when the current mid-axle torque is greater than the maximum mid-axle torque, determine the rear axle torque compensation value based on the current mid-axle torque difference between the current mid-axle torque and the maximum mid-axle torque; and compensate the current rear axle torque based on the rear axle torque compensation value.

[0126] The torque distribution device of the vehicle described above can perform the torque distribution method of the vehicle provided by any of the embodiments of the present application, and has the function modules and beneficial effects corresponding to the execution method. The technical details not described in detail in the present embodiment can be referred to the torque distribution method of the vehicle provided by any of the embodiments of the present application.

[0127] Since the torque distribution device of the vehicle described above is a device that can perform the torque distribution method of the vehicle in the embodiments of the present application, based on the torque distribution method of the vehicle described in the embodiments of the present application, those skilled in the art can understand the specific implementation of the torque distribution device of the vehicle in the embodiments of the present application and its various forms, so here the torque distribution device of the vehicle how to implement the torque distribution method of the vehicle in the embodiments of the present application will not be described in detail. As long as the device used to implement the torque distribution method of the vehicle in the embodiments of the present application is implemented by those skilled in the art, it belongs to the scope of the present application.

[0128] Embodiment six

[0129] The embodiments of the present application provide a computer readable storage medium, and the computer readable storage medium stores computer execution instructions. When the computer execution instructions are executed by a processor, the computer execution instructions are used to implement the torque distribution method of the vehicle of the above-mentioned embodiments.

[0130] Embodiment seven

[0131] The embodiments of the present application provide a vehicle, comprising: a vehicle controller; the vehicle controller is used to execute the torque distribution method of the vehicle of the above-mentioned embodiments.

[0132] Therefore, the vehicle provided by the present embodiment can achieve the effect of the torque distribution method of the vehicle of the above-mentioned embodiments, and the same parts can be referred to the description above, which will not be described here.

[0133] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A torque distribution method for a vehicle, characterized in that: include: Acquiring vehicle operating condition information in real time; the operating condition information includes the actual mass of the vehicle, the actual slope of the road on which the vehicle is traveling, the longitudinal acceleration of the vehicle, the speed of the vehicle, and the driver's required torque; determining a current torque distribution coefficient of the vehicle according to current operating condition information of the vehicle; A current central axle torque and a current rear axle torque of the vehicle are determined according to the current torque distribution coefficient and the current torque demanded by the driver.

2. The vehicle torque distribution method according to claim 1, characterized in that: Determining a current torque distribution coefficient of the vehicle according to current operating condition information of the vehicle includes: determining, based on current operating condition information of the vehicle, whether the vehicle satisfies a power activation condition; When the current operating condition information of the vehicle meets the dynamic activation condition, the current torque distribution coefficient of the vehicle is determined according to the current actual mass of the vehicle, the current longitudinal acceleration of the vehicle, and the current actual slope of the driving road.

3. The vehicle torque distribution method according to claim 2, characterized in that: The dynamic activation conditions include: the actual mass is greater than a mass threshold, the actual gradient is greater than a gradient threshold, the longitudinal acceleration is greater than an acceleration threshold, and the required torque is greater than a torque threshold.

4. The vehicle torque distribution method according to claim 2, characterized in that: When the vehicle satisfies the dynamic activation condition, determining a current torque distribution coefficient of the vehicle according to the current actual mass of the vehicle, the current longitudinal acceleration of the vehicle, and the current actual slope of the driving road includes: When the vehicle satisfies the dynamic activation condition, determining a current load state of the vehicle according to a current actual mass of the vehicle; Determining a current coefficient mapping relationship of the vehicle according to the current load state; the coefficient mapping relationship includes a mapping relationship between the longitudinal acceleration and the actual slope and a torque distribution coefficient; According to the current longitudinal acceleration and the current actual slope, a torque distribution coefficient corresponding to the current longitudinal acceleration and the current actual slope in the current coefficient mapping relationship is determined as the current torque distribution coefficient.

5. The vehicle torque distribution method according to claim 4, characterized in that: Determining a current load state of the vehicle according to the current actual mass of the vehicle includes: When the current actual mass of the vehicle is less than a first preset mass, determining that the current load state of the vehicle is a light load state; When the current actual mass of the vehicle is greater than or equal to the first preset mass and less than a second preset mass, determining that the current load state of the vehicle is a medium load state; When the current actual mass of the vehicle is greater than or equal to the second preset mass, it is determined that the current load state of the vehicle is a heavy load state.

6. The vehicle torque distribution method according to claim 4, characterized in that: The load state of the vehicle includes a light load state, a medium load state and a heavy load state; the coefficient mapping relationship includes a first coefficient mapping relationship, a second coefficient mapping relationship and a third coefficient mapping relationship; Determining a current coefficient mapping relationship of the vehicle according to the current load state includes: When the current load state is a light load state, determining the current coefficient mapping relationship of the vehicle to be a first coefficient mapping relationship; When the current load state is a medium load state, determining the current coefficient mapping relationship of the vehicle to be a second coefficient mapping relationship; When the current load state is a heavy load state, determining the current coefficient mapping relationship of the vehicle to be a third coefficient mapping relationship; Among them, under the same longitudinal acceleration and the same road slope, the torque distribution coefficient determined based on the first coefficient mapping relationship is smaller than the torque distribution coefficient determined based on the second number mapping relationship, and the dynamic torque distribution coefficient determined based on the second number mapping relationship is smaller than the torque distribution coefficient determined based on the third number mapping relationship.

7. The vehicle torque distribution method according to claim 2, characterized in that: Determining a current torque distribution coefficient of the vehicle according to current operating condition information of the vehicle further includes: When the current operating condition information of the vehicle does not meet the power activation condition, a current torque distribution coefficient of the vehicle is determined according to the current vehicle speed and the current torque requirement of the driver.

8. The vehicle torque distribution method according to claim 1, characterized in that: Determining a current center axle torque and a current rear axle torque of the vehicle according to the current torque distribution coefficient and the current torque demanded by the driver, respectively, includes: determining the current intermediate shaft torque by multiplying the current torque distribution coefficient by the current required torque; determining a current rear axle torque coefficient according to the current torque distribution coefficient; The product of the current rear axle torque coefficient and the current required torque is determined as the current rear axle torque.

9. The vehicle torque distribution method according to claim 8, characterized in that: Also includes: Obtaining a maximum rear axle torque of the vehicle; When the current rear axle torque is greater than the maximum rear axle torque, determining a middle axle torque compensation value according to a current rear axle torque difference between the current rear axle torque and the maximum rear axle torque; The current mid-axle torque is compensated according to the mid-axle torque compensation value.

10. The vehicle torque distribution method according to claim 8, characterized in that: Also includes: Obtaining a maximum mid-axle torque of the vehicle; When the current middle axle torque is greater than the maximum middle axle torque, determining a rear axle torque compensation value according to a current middle axle torque difference between the current middle axle torque and the maximum middle axle torque; The current rear axle torque is compensated according to the rear axle torque compensation value.

11. A torque distribution device for a vehicle, characterized in that: include: An operating condition information acquisition module is used to acquire the vehicle's operating condition information in real time; the operating condition information includes the actual mass of the vehicle, the actual slope of the road on which the vehicle is traveling, the longitudinal acceleration of the vehicle, the speed of the vehicle, and the driver's required torque; a distribution coefficient determination module, configured to determine a current torque distribution coefficient of the vehicle based on current operating condition information of the vehicle; The torque determination module is configured to determine a current central axle torque and a current rear axle torque of the vehicle according to the current torque distribution coefficient and the current torque demanded by the driver.

12. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the torque distribution method for a vehicle as described in any one of claims 1 to 10.

13. A vehicle, characterized in that: include: Vehicle controller; the vehicle controller is used to execute the torque distribution method for the vehicle described in any one of claims 1-10.

Images