Brake pressure control method for a motor vehicle power brake system
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United States of America Patent
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-
Oct 8, 2002
Grant Date -
N/A
app pub date -
Sep 27, 1994
filing date -
Sep 27, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method controls brake pressure for a motor vehicle pressure medium-actuated power brake system in which the adjustment of a proportionality factor (k) between deceleration and brake pressure starting from an initial value (k.sub.o) is limited to a range bounded by a lower limit value and an upper limit value in which range the initial value (k.sub.o) is contained. This produces a warning travel of the pedal when excessive deviation of the brake pressure from the expected value occurs. The warning travel informs the driver of the braking effect which is deviating excessively from the expected degree. Methods are known in which a specific travel (s.sub.p) of the brake pedal is interpreted as a setting of a specific desired deceleration (z.sub.s) of the vehicle and the required brake pressure is set automatically if appropriate by incrementally adjusting a variable proportionality factor (k).
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