Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1998-05-06
1999-09-14
Nguyen, Hoang
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
13762521, 180417, 180426, F15B 910
Patent
active
059505184
ABSTRACT:
A steering valve (30) directs hydraulic fluid from a hydraulic fluid source to a hydraulic cylinder of a steering system in a vehicle. The steering valve includes a rotatable first shaft (32) having a first face valve member (36) on an end portion of the first shaft and a rotatable second shaft (34) having a second face valve member (50) on an end portion of the second shaft. The first face valve member (36) includes a plurality of channels (40, 42) fluidly connected with the hydraulic cylinder and the second face valve member (50) includes a plurality of passages (54, 56) fluidly connected with the hydraulic fluid source. A rotatable intermediate disk (70) is located between the first and second face valve members (36, 50). The intermediate disk (70) includes a plurality of axially extending bores (80a-80d) for fluidly connecting the plurality of channels (40, 42) with the plurality of passages (54, 56). The intermediate disk (70) is controllably connectable with each of the first and second face valve members (36, 50) for rotation relative to the other of the first and second face valve members to provide different levels of steering assistance.
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Copy of European Search Report dated Jul. 11, 1996.
Nguyen Hoang
TRW Fahrwerksysteme GmbH & Co. KG
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