Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Reexamination Certificate
2005-05-17
2005-05-17
Black, Thomas G. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
C701S076000, C701S079000, C701S070000, C303S176000, C303S194000
Reexamination Certificate
active
06895322
ABSTRACT:
An improved ABS control method incorporates entry criteria for initiating ABS control based on brake pedal position and rate of depression, adaptively adjusted by a reference pedal position corresponding to a predefined vehicle deceleration. A periodically-updated characterization of the relationship between brake pedal position and vehicle deceleration is used to establish the reference brake pedal position, and when insipient wheel lock is detected, the initiation of ABS control is delayed by an entry delay period that decreases with increasing rate of pedal depression and with the degree to which the pedal position exceeds the reference pedal position. In this way, the entry conditions are predicated primarily on the manner of brake pedal depression, with adaptive adjustment for variations in braking effectiveness.
REFERENCES:
patent: 5431488 (1995-07-01), DeVore
patent: 6120110 (2000-09-01), Shimizu
patent: 6490518 (2002-12-01), Walenty et al.
Leppek Kevin Gerard
Thatcher David Alan
Walenty Allen John
Black Thomas G.
Broadhead Brian J.
DeVries Christopher
General Motors Corporation
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