Adaptive wheel slip threshold

Details Adaptive wheel slip threshold Adaptive wheel slip threshold

1989-04-13

1990-04-10

Chin, Gary

Boots, shoes, and leggings

303100, 303106, B60T 800

Patent

active

049166190

ABSTRACT:
A brake control system is described that maximizes vehicle braking efficiency by first determining, and then cycling wheel brake pressure and consequently wheel slip about, the critical slip value for the road surface. As each road surface has unique tractive characteristics, the amount of brake pressure required to produce critical wheel slip, and hence maximum brake force, varies for different coefficient of friction road surfaces. This invention determines the coefficient of friction for the operating surface and adjusts the system slip threshold to accurately mimic the actual critical slip value for the road surface. The invention then applies and releases wheel brake pressure so as to cycle wheel slip about this critical slip value.

REFERENCES:
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patent: 4530059 (1985-07-01), Brearley et al.
patent: 4664453 (1987-05-01), Kade
patent: 4666218 (1987-05-01), Masaki et al.
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patent: 4715662 (1987-12-01), Van Zanten et al.
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patent: 4750124 (1988-06-01), Lin et al.
patent: 4763912 (1988-08-01), Matsuda
patent: 4794538 (1988-12-01), Cao et al.
patent: 4797825 (1989-01-01), Shimanuki et al.
patent: 4818037 (1989-04-01), McEnnan
Research Disclosure #295100, p. 924, Nov. 1988.

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