Method of sensing excessive slip in a wheel slip control system

Details Method of sensing excessive slip in a wheel slip control system Method of sensing excessive slip in a wheel slip control system

1991-10-03

1994-05-24

Chin, Gary

Boots, shoes, and leggings

36442601, 180147, B60K 1734, B60T 804

Patent

active

053155190

ABSTRACT:
The onset of an excessive slip condition in a slip controller is determined so that it is adaptable to the actual drive torque conditions between the driven wheel and the road surface so as to achieve the desired acceleration or braking characteristics for all vehicle driving conditions including while the vehicle is traveling on a curved road surface. At low vehicle speeds, slip control is enabled when the value of a predetermined function of the difference in speeds of the driven and undriven wheels exceeds a threshold that is a function of the vehicle turn radius and at high vehicle speeds when the value of a predetermined function of a wheel slip ratio exceeds the threshold that is a function of the vehicle turn radius. The vehicle speed below which slip control is enabled based on a wheel speed function and above which traction control is enabled based on the wheel slip function increases with an increasing vehicle steering angle.

REFERENCES:
patent: 4711317 (1987-12-01), Sakakiyama
patent: 4718735 (1988-01-01), Ogino
patent: 4763912 (1988-08-01), Matsuda
patent: 4771850 (1988-09-01), Matsuda
patent: 4932726 (1990-06-01), Iwata et al.
patent: 4933856 (1990-06-01), Leiber
patent: 4998782 (1991-03-01), Thatcher et al.
patent: 5002147 (1991-03-01), Tezuka et al.
patent: 5047941 (1991-09-01), Seki
patent: 5090510 (1992-02-01), Watanabe et al.

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