Power assisted steering apparatus for automotive vehicle

Details Power assisted steering apparatus for automotive vehicle Power assisted steering apparatus for automotive vehicle

1997-01-16

1999-07-13

Hurley, Kevin

Motor vehicles

Steering gear

With fluid power assist

180421, 60418, B62D 506

Patent

active

059213426

ABSTRACT:
A power assisted steering apparatus for a vehicle having a driving source, such as an engine, has an actuator, a hydraulic pump, a working oil pressure passage, and a drive switch. The actuator, which is in the vehicle steering mechanism, receives a supply or exhaust of a working oil to assist the steering operation. The pump is selectively driven by an engine via a clutch mechanism. The working oil discharged from the pump is introduced into the actuator via the passage. The check valve is interposed within the passage to enable flow in one direction away from the pump. The drive switch structure is disposed within the passage, downstream from the check valve. With this arrangement, the drive switch structure can be activated by pressure in the passage downstream of the check valve to control the clutch mechanism.

REFERENCES:
patent: 4002220 (1977-01-01), Wible
patent: 4100739 (1978-07-01), Shaffer
patent: 5209317 (1993-05-01), Schnelle
patent: 5271475 (1993-12-01), Takeshita
patent: 5293952 (1994-03-01), Ledamoisel et al.

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