Boots – shoes – and leggings
Patent
1986-10-06
1988-12-27
Chin, Gary
Boots, shoes, and leggings
180197, 303 95, 36442603, B60T 832
Patent
active
047945389
ABSTRACT:
Wheel speed (V.sub.R) and braking pressure (P.sub.B) applied to a wheel are continuously measured and utilized to estimated values from a mathematical system model, to obtain the physical values: coefficient of friction (.mu.), vehicle speed (V.sub.F), slope of a slip curve (d.mu./dS), slip (S), and coefficient of friction of a stationary-rotary brake couple structure. At least one of the physical values so obtained, and preferably the coefficient of friction (.mu.), vehicle speed, and slope of wheel slip curve are used to control braking pressure being applied to the wheel. Braking pressure can be controlled for example for braking in accordance with coefficient of friction and slope of the friction-slip curve, for example to operate the wheel just before the coefficient of friction drops as the wheel begins to slip. Spinning of a wheel can be avoided by controlling the braking pressure to be below slippage value.
REFERENCES:
patent: 3614173 (1971-10-01), Branson
patent: 3718374 (1973-02-01), Ochia
patent: 4336592 (1982-06-01), Beck
patent: 4344139 (1982-08-01), Miller et al.
patent: 4392202 (1983-07-01), Matsuda
Cao Chi-Thuan
Janetzke Helmut
Michi Harald
Schulz Alfred
Chin Gary
Robert & Bosch GmbH
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