Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1985-03-06
1987-04-21
Chambers, A. Michael
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60443, 60452, F15B 708
Patent
active
046585842
ABSTRACT:
An improved power steering system for vehicles is utilized in association with a variable discharge pump for supplying pressure fluid to one of both cylinder chambers divided by a piston of a power cylinder, selectively. The power steering system includes a variable throttle provided in a fluid supplying passage between the pump and the cylinder chamber. Upon rotation of a steering shaft, an adjusting member adjusts a cross sectional area of the variable throttle in accordance with the variable steering torque. The power steering system also includes a discharge quantity controller for controlling a discharge quantity of the pressure fluid of the pump so that a pressure differential between up and downstreams of the variable throttle is constant. The discharge quantity of the pressure fluid of the pump is changed to be suitable to the any variable steering torque.
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Kuroyanagi Masatoshi
Matsui Kazuma
Moriguchi Koichi
Suzuki Masahiko
Chambers A. Michael
Fox John C.
Nippondenso Co. Ltd.
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