Brake system
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United States of America Patent
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Feb 4, 2003
Issued Date -
N/A
app pub date -
Apr 9, 2001
filing date -
Jan 8, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hydraulic-pressure counter-force mechanism 37 which produces a counter force when a brake booster is operated is made up of an input-side member 38 slidable disposed within a valve body 3, a second constant-pressure chamber 39 formed on the rear side of the input-side member and into which a pressure is introduced from a constant pressure chamber A, and a second constant-pressure chamber 39 formed on the front side of the input-side member and into which a pressure is introduced from a variable pressure chamber B. The counter force from the hydraulic-pressure counter-force mechanism 37 is reduced by an orifice passage 43 as counter-force reducing means in rapid operation for brake.
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