Variable displacement vane pump and power steering system

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United States of America Patent

PATENT NO 9714657
SERIAL NO

14428322

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Importance

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Abstract

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A variable displacement vane pump and a power steering can secure a discharge flow rate when a steering wheel is turned, and restrict the discharge flow rate when the steering wheel is not turned. In the variable displacement vane pump and power steering system, a bypass line is formed. The bypass line causes a hydraulic fluid in a high pressure chamber of a control valve, which controls an eccentricity of a cam ring, to flow directly to a low pressure chamber side of the control valve. The hydraulic fluid flows directly to the low pressure chamber side of the control valve when the steering wheel is turned.

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Patent Owner(s)

  • HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Imanaga, Hiroki Zama, JP 4 7
Muramatsu, Satoshi Atsugi, JP 125 3104
Uchida, Yukio Atsugi, JP 45 294

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