Power plants – Pressure fluid source and motor – Pulsator
Patent
1985-03-07
1988-02-09
Hershkovitz, Abraham
Power plants
Pressure fluid source and motor
Pulsator
60418, 60431, 60582, F15B 700
Patent
active
047234121
ABSTRACT:
A hydraulic brake system for automotive vehicles with a master brake cylinder and with a hydraulic power booster (1) connected upstream of the master brake cylinder, in which a pressure medium pump (6) drivable by an electric motor (9) is employed for providing auxiliary hydraulic energy. The drive of the pressure medium pump (6) may be switched on by a pressure contact (13) of a pressure accumulator (4), on the one hand, and by a brake pedal contact (11), on the other hand. In the unbraked operation of the automotive vehicle, the pressure medium accumulator is permanently kept on a pressure level sufficient for an initial actuation of the brake. A valve assembly is provided which establishes a hydraulic connection between the outlet of the pressure medium pump (6) and the pressure port of the hydraulic power booster (1). An electromagnetically actuatable two-way/two-position directional control valve (5) is connected to the valve assembly (7), which valve (5) is normally open and which is adapted to be switched to its closed position by a brake pedal contact (11).
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Hershkovitz Abraham
IT&T Industries, Inc.
Michals William J.
Raden James B.
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