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Failure control method for electric drive system of four-wheel distributed drive passenger car

An electric drive system, failure control technology, applied in electric vehicles, control drives, control devices, etc., can solve the problem of not fully exploiting the independent drive advantages of four-wheel distributed drive vehicles, and achieve the best driving ability and handling stability. Effect

Inactive Publication Date: 2020-05-15
XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach obviously does not give full play to the independent driving advantages of four-wheel distributed drive vehicles, and there are many disadvantages

Method used

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  • Failure control method for electric drive system of four-wheel distributed drive passenger car
  • Failure control method for electric drive system of four-wheel distributed drive passenger car
  • Failure control method for electric drive system of four-wheel distributed drive passenger car

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Embodiment Construction

[0033] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0034] Such as figure 1 As shown, the present invention specifically divides the failure mode of the electric drive system into single-wheel motor failure mode, double-wheel motor failure mode and multi-wheel motor failure mode according to the number and distribution of faulty wheel motors, wherein the double-wheel motor failure mode The modes can be further divided into the same-side double-wheel motor failure mode and the opposite-side double-wheel motor failure mode. Specifically, the single-wheel motor failure mode includes four situations: left front wheel motor failure, left rear wheel motor failure, right front wheel motor failure, and right rear wheel motor failure; two-wheel motor failure modes on the same side include left two-wheel motor failure and There are two cases of failure of the right two-wheel motor; the failure mode of the two-wheel...

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Abstract

The invention discloses a failure control method for an electric drive system of a four-wheel distributed drive passenger car. The failure control method comprises the following steps: selecting a vehicle to enter a two-wheel drive mode or a parking mode according to a failure mode of the electric drive system; performing motor torque distribution on a non-failure motor when entering the two-wheel drive mode; calculating ideal yaw velocity under different conditions according to the reference ideal insufficient steering degree US; calculating an ideal side slip angle by combining an integralestimation method and a side slip angle upper limit empirical formula; using a fuzzy control algorithm, using errors of the yaw velocity and the side slip angle as input variables to calculate additional yaw moment; carrying out offline calculation to obtain output torque MAP graphs of the vehicle under different accelerators and vehicle speeds, and according to the operation intention of a driver, carrying out interpolation on the accelerator pedal opening degree and the current vehicle speed to obtain expected longitudinal driving torque; and based on a double-track two-degree-of-freedom nonlinear vehicle model, performing motor torque distribution on the non-failure motor in combination with the additional yawing torque and the expected longitudinal driving torque.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a method for controlling the failure of an electric drive system of a four-wheel distributed drive passenger car. Background technique [0002] The electric drive system of a four-wheel distributed drive bus is composed of four wheel motors and related components. Compared with the traditional centralized control mode, the distributed control mode of the wheels is easier to exert the power of the vehicle and ensure the stability of the vehicle. At the same time, it also makes the driving conditions of the vehicle more complicated, requiring higher fault tolerance. At present, for the failure control of the electric drive system, the processing method of deceleration and parking is generally adopted, and the driving can only be continued after the vehicle failure is repaired. This processing method obviously does not give full play to the independent driving advantages of...

Claims

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Application Information

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IPC IPC(8): B60L3/00B60L15/20B60L15/32
CPCB60L3/0061B60L15/20B60L15/32B60L2220/42B60L2220/44B60L2240/423Y02T10/72
Inventor 陈超苏亮朱武喜刘志伟宋光吉黄玲
Owner XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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