Power plants – Pressure fluid source and motor – Pulsator
Patent
1984-04-06
1987-04-14
Hershkovitz, Abraham
Power plants
Pressure fluid source and motor
Pulsator
60413, 60560, 60582, 91 28, F15B 700
Patent
active
046568336
ABSTRACT:
A hydraulic brake system for automotive vehicles with a master brake cylinder (51) and with a hydraulic power booster (49) connected upstream of the master brake cylinder, in which a pressure medium pump (18) which may be driven by an electric motor (17) is used for providing an auxiliary hydraulic energy, the drive of which may be switched on by a pressure accumulator (1), on the one hand, and by a brake pedal contact (58), on the other hand, in the unbraked operation of the automotive vehicle the pressure accumulator (1) permanently being kept on a pressure level sufficient for an initial actuation of the brake and the charge of the pressure accumulator (1) being monitored by a pressure control valve (19). In view of an energy demand of the brake system which will be as low as possible, this invention suggests that a valve passage (40, 42) of the valve arrangement (19) is operable by a pressure in the booster chamber of the hydraulic power booster (49) such as to establish a direct communication between the outlet of the pressure medium pump (18) and the pressure medium port of the hydraulic power booster (49).
REFERENCES:
patent: 2945352 (1960-07-01), Stelzer
patent: 3080718 (1963-03-01), Clary
patent: 4034566 (1977-07-01), Suketomo et al.
patent: 4242867 (1981-01-01), Belart
patent: 4285198 (1981-08-01), Budecker
patent: 4477125 (1984-10-01), Belart et al.
patent: 4483144 (1984-11-01), Steffes
Hershkovitz Abraham
IT&T Industries, Inc.
Michals William J.
Raden James B.
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