control systems for vehicles

Abstract

A control system for a vehicle having a first wheel arranged to be driven by a first motor and a second wheel arranged to be driven by a second motor, wherein the first wheel and the second wheel are transverse relative to each other Located on a vehicle, the control system includes a first controller associated with the first electric machine and a second controller associated with the second electric machine, wherein the first controller includes when the second means for estimating a first power value for power applied to said second wheel by said second motor when the motor is placed in a first motor configuration, and when said second motor is placed in a second motor configuration , means for estimating a second power value for the power applied by the second motor to the second wheel, wherein when a predetermined condition occurs, the first controller is arranged to determine the power supplied by the first motor to the A first power difference between the power applied by the first wheel and the first power value, and a second power difference between the power applied by the first motor to the first wheel and the second power value is determined. a power difference, wherein if the first controller determines that either the first power difference or the second power difference is greater than a predetermined value, the first controller is arranged to adjust the rotational speed produced by the first motor torque, or if it is determined that both the first power difference and the second power difference are less than a predetermined value, the first controller is arranged to maintain the torque produced by the first electric machine.

Description

technical field [0001] The invention relates to a control system, especially for a vehicle. Background technique [0002] With the increased interest in environmentally friendly vehicles, perhaps not surprisingly, there has been a corresponding increase in interest in the use of electric vehicles. [0003] While most commercial electric vehicles utilize a central electric motor that drives two or more wheels, an alternative that is gaining popularity employs in-wheel electric motors, where individual electric motors are to drive the respective wheels of the vehicle, allowing the torque transfer to each wheel to be independently controlled. The fast response characteristics of the electric motors and the independent torque control of the vehicle wheels allow in-wheel electric motors to be used to improve vehicle stability to supplement or replace additional vehicle stability control mechanisms. For example, independent torque control of in-wheel electric motors can be used ...

AI Technical Summary

Problems solved by technology

[0006] However, if the monitoring system cannot receive torque information related to one of the wheels, in order to prevent dangerous yaw induction, the monitoring system usually puts the drive system in a safe state by disabling the entire drive system, resulting in the disabling of the vehicle

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