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Four-wheel-drive control method for pure electric vehicle with dual-drive bridge structure

A technology of pure electric vehicle and control method, applied in the field of pure electric vehicle control, can solve the problems of unreasonable configuration of output torque and the like

Inactive Publication Date: 2021-06-15
DAYUN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problem of unreasonable output torque configuration of the existing four-wheel drive control method for pure electric vehicles with dual drive bridge structure, and provides a four drive control method for pure electric vehicles with double drive bridge structure

Method used

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  • Four-wheel-drive control method for pure electric vehicle with dual-drive bridge structure

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Embodiment Construction

[0035] Dual drive bridge architecture pure electric vehicle four-wheel drive control method, the content, through the linear interpolation method, the torque allocation of the front and rear motor is realized by linear interpolation method:

[0036] Request torque (also known as original torque) is 0: The motor torque is 0 when the vehicle speed is 0, and the speed of the motor torque is 0. when the speed is 10km / h, and the speed of the motor torque is for the speed of 20 km / h. 0, the speed of the motor torque is 100% in the speed of 30km / h-120km / h;

[0037] Request torque is 20 N · m: The speed of the motor torque is 50% when the speed is 0, and the speed of the motor torque is 50%, the speed of 20 km / h is 50%, and the motor torque is 50. %, The speed of the motor torque is 100% in the speed of 30km / h-120km / h;

[0038] Request torque is 40 n · m: The speed of the motor torque is 75% when the vehicle speed is 0, and the speed of the motor torque is 75%, the speed of ...

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Abstract

The invention relates to a pure electric vehicle control method, in particular to a four-wheel drive control method for a pure electric vehicle with dual-drive bridge structure. The problem that according to an existing four-wheel-drive control method for the pure electric vehicle with the dual-drive bridge structure, output torque configuration is unreasonable is solved. According to the control method, the working state and the output torque of the front and rear drive systems are reasonably configured, a more flexible and refined four-wheel drive mode is achieved, and meanwhile low power consumption of the electric automobile is guaranteed. When the rotating speed difference of the front wheel and the rear wheel is larger than or equal to 2.5 km / h, a front wheel slip limiting state is started; and in a front wheel slip limiting state, torque redistribution of front and rear motors is performed through a linear interpolation method. The whole vehicle driving mode is divided into an ECO mode, a NORMAL mode and an SPORT mode, and the three modes comprise respective accelerator pedal MAPs and respective brake pedal MAPs; and the driving mode state of the last cycle needs to be stored after power-on again.

Description

Technical field [0001] The present invention relates to a pure electric vehicle control method, specifically a two-drive bridge architecture pure electric vehicle four-wheel drive control method. Background technique [0002] Double drive bridge architecture pure electric vehicle includes two motors, namely front wheel shaft motors, and rear axle motors. The front wheel axle motor drives the front wheel axle by the front wheel shaft, and the rear axle motor is driven by the rear axle gearbox. The accelerator pedal (also known as the throttle pedal) gives the vehicle controller (VCU), the VCU is converted into the request torque value according to the accelerator pedal MAP, and the request torque value is required to pass once. After the algorithm, the combined vehicle speed is divided into a front wheel axle motor torque value and the rear wheel axis motor torque value, the front wheel axle motor torque value and the rear axle motor torque value are then subjected to the secondar...

Claims

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Application Information

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IPC IPC(8): B60L15/20B60L15/32
CPCB60L15/20B60L15/32B60L2220/42B60L2240/12B60L2240/423Y02T10/72Y02T10/64
Inventor 贺日升宫庆伟武贝贝
Owner DAYUN AUTOMOBILE CO LTD
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