Fluid-pressure and analogous brake systems – Speed-controlled – Multiple control signal with multiple threshold
Patent
1997-11-12
2000-04-04
Le, Mark T.
Fluid-pressure and analogous brake systems
Speed-controlled
Multiple control signal with multiple threshold
303149, 303150, B60T 860
Patent
active
06045198&
ABSTRACT:
An antiskid brake controller, which can secure a sufficient braking capability, avoid a locked state and maintain high reliability regardless of a road surface state without using a road sensor, includes a detector for detecting respective wheel speeds, a braking force adjustment unit which responds to the application of a brake and an electronic control unit (ECU) for calculating a control amount to the braking force adjustment unit to prevent the locking tendencies of respective wheels. The ECU includes a wheel deceleration calculator for calculating the wheel decelerations corresponding to the locking tendencies, a grouping unit for grouping the respective wheel speeds to a plurality of groups, a calculator for calculating a basic wheel speed based on the respective wheel speeds of the groups, a unit for presuming road surface friction factors based on the change in time of the basic vehicle speed, a threshold setting unit for variably setting the threshold values of the wheel decelerations in accordance with road surface friction factors and a calculation unit for calculating control amounts based on the result of comparison of the wheel decelerations with the threshold values.
REFERENCES:
patent: 5092662 (1992-03-01), Okubo
patent: 5385393 (1995-01-01), Tanaka et al.
patent: 5421644 (1995-06-01), Prescott et al.
patent: 5466054 (1995-11-01), Okazaki
patent: 5676434 (1997-10-01), Ichikawa et al.
Naito Yasuo
Tsuji Hiroyuki
Le Mark T.
Mitsubishi Denki & Kabushiki Kaisha
Siconolfi Robert A.
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