Road surface friction and hill slope estimator

Details Road surface friction and hill slope estimator Road surface friction and hill slope estimator

1990-06-11

1992-07-21

Chin, Gary

Boots, shoes, and leggings

36455101, 180197, 73105, 303103, B60T 858

Patent

active

051329069

ABSTRACT:
A system and method for estimating hill slope and coefficient of friction for a road surface from vehicle and engine measurements. A first variable related to hill slope and a second variable related to road surface coefficient of friction are generated from the vehicle and engine measurements and may be used in a variety of control applications. The method includes the steps of generating a first variable related to the slope of the hill and a second variable related to the coefficient of friction of the road surface. The hill slope can be determined from the first variable and the coefficient of friction of the road surface can be determined from the second variable. These estimated values can then be used in control applications. The braking and traction control systems of a vehicle respond to a first variable related to hill slope and a second variable related to road surface of coefficient of friction.

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