DAMPER VALVE OF HYDRAULIC POWER STEERING DEVICE

Japanese Patent JP3963600

B2

PROBLEM TO BE SOLVED: To provide a damper valve for a hydraulic power steering device of a vehicle capable of establishing an improved damping performance, eliminating the resisting or sticking feeling in the steering operation, particularly in the low-speed running, enhancing the comfortableness in steering, and decreasing the number of component parts.
SOLUTION: A damper valve 30 of a hydraulic power steering device is equipped with a piston valve 46 installed in a working oil circuit tying an oil passage selector valve in a gear box to the left and right oil chambers of a power cylinder and opening with a flow of a working oil circulated back to the oil passage changeover valve from either of the left and right oil chambers and a check valve 40 installed in the valve element 36 of the piston valve 46 and allowing flow-through of only the working oil supplied to either oil chamber of the power cylinder from the oil passage selector valve. The piston valve 46 forms a throttled oil passage with flow-through of the circulated working oil having a pressure below a certain level and forms a full open oil passage with flow-through of the circulated working oil having a pressure over the specified level. Oil passages 39 and 36a for the circulated working oil are formed in the valve element 36 of the piston valve 46.

JPS58139866	FLOW RATE CONTROLLER FOR POWER STEERING
JP2017013530	VEHICULAR STEERING DEVICE

Seiji Hamano
Akihiko Serizawa
Aiko Satoshi

JP34252798A

August 22, 2007

December 02, 1998

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Showa Corporation

B62D5/07; F16F9/512; F16K47/04; (IPC1-7): B62D5/07; F16K47/04

JP2049109Y2
JP54069534U

Nozomi Gangwon
Nakamura Kun
Kuniyoshi Obata

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