Brake booster

Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type

Patent

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Details

91434, 60552, F15B 910

Patent

active

061614645

ABSTRACT:
A brake reaction which occurs as a brake booster is actuated is prevented from being transmitted to a brake pedal, and instead pseudoction reaction imparting means 41 is provided to transmit a pseudo-reaction to the brake pedal. A valve body 5 and a power piston 3 are capable of relative movement in the axial direction, and are normally urged away from each other by a spring 8. The valve body 5 is normally urged forward by a spring 42 which is disposed within the variable pressure chamber B. This arrangement allows a variation in the advancing stroke of the brake pedal to be suppressed small if a variation occurs in the magnitude of a negative pressure which is introduced into a constant pressure chamber A as the brake booster is actuated, thus providing an improved brake feeling experienced by a driver.

REFERENCES:
patent: 2796154 (1957-06-01), Stelzer
patent: 3152518 (1964-10-01), Ayers, Jr.
patent: 3373662 (1968-03-01), Voll, et al.
patent: 3411414 (1968-11-01), Brown, et al.
patent: 3534662 (1970-10-01), Eggstein
patent: 5337650 (1994-08-01), Uyama
patent: 5802952 (1998-09-01), Ikeda

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