Motor vehicles – Steering gear – With fluid power assist
Patent
1997-01-07
1999-11-02
Oberleitner, Robert J.
Motor vehicles
Steering gear
With fluid power assist
180441, 180442, 417302, 417308, 417310, B62D 500
Patent
active
059752327
ABSTRACT:
A power assisted steering apparatus for a vehicle has a driving source and an actuator for the vehicle's steering mechanism, to power assist the steering operation. The driving source, such as an engine, continuously drives a pump. A working passage is arranged so that working oil discharged from the pump is introduced into the actuator. A check valve is disposed in the working passage, between the actuator and the pump so that the working oil flows only one way to the actuator. An accumulator is connected to the working passage, between the check valve and the actuator to maintain a predetermined pressure in the working passage. A regulator is connected to the working passage, between the pump and the check valve to regulate flow to the actuator. When the pressure within the working passage reaches the predetermined pressure, the working fluid is dumped to a reservoir, bypassing the check valve, the accumulator, and the actuator.
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Aihara Toshinori
Komatsu Koichi
Maruyama Tatsuyoshi
Saita Norihiro
Yokota Tadaharu
Lipka Pamela J.
Oberleitner Robert J.
Unisia Jecs Corporation
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