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Vehicle traction control using an active limited slip differential
Vehicle traction control using an active limited slip differential
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机译：使用主动限滑差速器的车辆牵引力控制
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摘要
A control module 12 includes a feedforward controller 18, a feedback controller 19, a longitudinal slip target generator 20, a wheel speed difference target generator 21, an actual wheel speed difference calculator 22 and a summer 23. A sensor array (17, fig 1) which provides values of steering wheel angle and yaw rate to the wheel speed difference target generator 21 that is also supplied with wheel speeds values via wheel speed sensors (13, 14, 15 and 16). A first drive torque request value is calculated by the feedforward controller 18 and this value is a correction to be added by the summer 23 to a second drive torque request value computed by the feedback controller 19. The slip target generator 20 calculates a desired longitudinal tyre-to-ground slip value for a slower of two wheels that is supplied to the wheel speed difference target generator 21 which calculates a desired wheel difference WD. An actual speed difference WA is determined by the actual wheel speed difference calculator 22. The values of WD and WA are fed to the feedback controller 19 which calculates the second drive torque request value necessary to minimise the magnitude of the difference between WA and WD. The final drive torque request value is the summation of the first drive torque request value and the second drive torque request value. The final drive torque request value is applied to an electric motor which controls a clutch in the active limited slip differential.
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