Boots – shoes – and leggings
Patent
1989-11-20
1991-04-02
Chin, Gary
Boots, shoes, and leggings
303100, 303103, B60T 858
Patent
active
050051326
ABSTRACT:
An antilock brake control device for use in a full-time four-wheel drive car has wheel rotation sensors for detecting the wheel rotations of the vehicle wheels, an electronic control circuit for calculating the wheel speeds, the estimated vehicle speed, the decelerations and the slip rates of the wheels from the wheel rotation signals from the sensors and for producing fluid pressure control signals based on the results of the calculation, and a fluid pressure control unit for controlling the braking force on the wheels independently of one another in response to the fluid pressure control signals. The electronic control circuit is adapted to calculate the coefficient of friction between the wheels and the road surface and the sum of slip rates of both rear wheels. If the coefficient of friction is higher than a first predetermined value and the sum of slip rates is smaller than a second predetermined value, the braking forces on all the wheels are controlled independently of one another. If the sum of slip rates is larger than the second predetermined value, the braking forces on the front wheels are controlled independently of each other and those on the rear wheels are controlled based on the wheel speed of one of the rear wheels rotating at a lower speed than the other.
REFERENCES:
patent: 4693522 (1987-09-01), Wupper et al.
patent: 4755945 (1988-07-01), Kade et al.
patent: 4759589 (1988-07-01), Leiber
patent: 4762376 (1988-08-01), Matsubara
patent: 4790607 (1988-12-01), Atkins
patent: 4805103 (1989-02-01), Matsuda
Chin Gary
Sumitomo Electric Industries Ltd.
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