The invention discloses a driving system for an electric four-wheel-drive vehicle and a torque distribution method of the driving system The torque distribution method comprises the following steps of calculating an optimum torque distribution coefficient according to the current vehicle speed and a driver's desired torque look-up table so as to obtain the optimum desired target torque and reasonably distribute the torque of a front driving system and a rear driving system In the method disclosed by the scheme of the invention, the torque distribution proportion of the front driving system and the rear driving system is calculated in a real-time manner; compared with the fixed-proportion distribution method adopted in the prior art, the method can better adapt to different driving conditions; through the two-dimensional table of the optimum torque distribution coefficients of the front or rear driving system determined for different demands, corresponding effects can be achieved; and specifically, based on the optimum efficiency of the vehicle power system, the driver's total demand torque is satisfied while the optimum efficiency of the vehicle power system is guaranteed, so that the economical efficiency and the power performance of the vehicle are taken into account

Driving system for electric four-wheel-drive vehicle and torque distribution method of driving system

The invention relates to a driving torque distributing control method of an electric automobile with dual motors, and belongs to the technical field of electric automobiles. The electric automobile comprises a front motor and a back motor, wherein the front motor is connected to a front shaft through a differential mechanism, and the back motor is connected to a back shaft through the differential mechanism. The control method includes the following steps of (1) calculating the driver required torque through vehicle control unit; (2) determining the distribution coefficient K of the back shaft driving torque and the distribution coefficient 1-K of the front shaft driving torque according to the driver required torque and vehicle speed, and k is larger than or equal to zero and smaller than or equal to one; and (3) determining back motor torque according to distribution coefficient K of the back shaft driving torque and front motor torque according to distribution coefficient K of the front shaft driving torque. According to the driving torque distributing control method of the electric automobile with dual motors, under the condition that original power system structure is not changed and cost is not increased, calculating method of distribution coefficient of the motor driving torque is optimized in order to achieve the technical effect of improving energy consumption.

Driving torque distributing control method of electric automobile with dual motors

The invention provides a torque distribution method and device and an electric automobile and relates to the technical field of automobile control. The method includes the steps that the required torque of the electric automobile is obtained; and according to traveling mode information and traveling parameter information of the electric automobile, the required torque is distributed to a front axle motor and a rear axle motor. According to the scheme, when the torque is distributed, on the basis that the basic requirement of the electric automobile is met, the power requirement of each singlemotor is reduced, cost is reduced, the power performance is improved, the energy use rate is increased, and the driving mileage is increased.

Torque distribution method and device and electric automobile

The invention provides a double-motor driving control method and device, a controller and an automobile, and relates to the technical field of motor driving control. The method comprises the steps that the current travelling speed and master driving torque needing to be output to an automobile body from motors are obtained; first output torque of the first motor and second output torque of the second motor are determined under the travelling conditions of the travelling speed and the master driving torque according to a torque reference table, wherein first output torque corresponding to the first motor and second output torque corresponding to the second motor under conditions of different travelling speeds and different master driving torque when thetotal electric power is the smallest are recorded in the torque reference table; and the output torque of the first motor and the output torque of the second motor are adjusted according to the first output torque and the second output torque which are determined. According to the scheme provided by the invention, the problem that the single-motor driving efficiency is low is solved, the double-motor comprehensive driving efficiency is always kept within an optimal range, and the comprehensive efficiency of a driving system is improved.

Double-motor driving control method and device, controller and automobile

The invention provides a vehicle control method and device as well as a vehicle The method comprises the following steps that a vehicle accelerator pedal depth percentage signal, a current vehicle speed and a torque area are acquired; and the accelerator pedal depth percentage signal is distributed to a first motor and/or a second motor of the vehicle according to the current vehicle speed and the torque area According to the vehicle control method and device as well as the vehicle, the problems that in the prior art, during the layered coordination energy efficiency control process of a four-drive hybrid electric vehicle, when the torque distribution value under the current working condition of each motor is obtained, the relevant parameter acquisition difficulty is large, the calculation is complex, and the optimal torque can not be accurately and timely distributed for all motors can be solved

Vehicle control method and device as well as vehicle

The invention discloses a method and a system for controlling torque of an electric four-wheel-drive vehicle. The method comprises the following steps: obtaining a current parameter and determining an optimal required torque distribution ratio corresponding to the current parameter as a target optimal required torque distribution ratio based on a pre-established mapping table of the parameter and the optimal required torque distribution ratio; and distributing current overall vehicle required torque to a front driving motor and a rear driving motor according to the target optimal required torque distribution ratio. The method and the system are capable of searching for the optimal required torque distribution ratio corresponding to the current parameter in the pre-established mapping table according to the current parameter of the vehicle in the driving process of the electric vehicle, distributing the current required torque to the front driving motor and the rear driving motor according to the found optimal required torque distribution ratio and ensuring that the distribution of the required torque meets the principle of optimal economy.

Method and system for controlling torque of electric four-wheel-drive vehicle

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Method and system for controlling torque of electric four-wheel-drive vehicle