Vehicle wheel slip control system using predictive model to esti

Details Vehicle wheel slip control system using predictive model to esti Vehicle wheel slip control system using predictive model to esti

1993-10-08

1995-04-11

Chin, Gary

Boots, shoes, and leggings

36443602, 303104, 180197, B60T 832, B60K 3100

Patent

active

054064864

ABSTRACT:
A vehicle slip control system for controlling a wheel slip based on a friction coefficient of a road surface measures an engine torque T.sub.E by applying an intake pipe negative pressure Pm and a number of engine revolutions Ne to an engine model. A drive torque T is measured by applying the engine torque T.sub.E to an A/T model, and a driving wheel acceleration d.omega. is obtained by finding a difference of a detected driving wheel speed .omega.. By filtering this driving wheel acceleration d.omega., a post-filter driving wheel acceleration d.omega..sub.0 is calculated. A squat force Ws is calculated from the drive-torque T and the post-filter driving wheel acceleration d.omega., and a friction coefficient .mu. of the road surface is estimated from the squat force Ws. The estimated friction coefficient .mu. is used to control a wheel slip.

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patent: 5249851 (1993-10-01), Johnsen
patent: 5275474 (1994-01-01), Chin et al.

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