发明名称 |
Variable displacement pump |
摘要 |
Within a cam ring ( 8 ), a rotor having a plurality of vanes ( 27 ) is eccentrically disposed. A metering orifice ( 136 ) is provided halfway on a discharge passage ( 135 ) of pressure fluid discharged from the pump, and a control valve is activated due to a pressure difference between the upstream and downstream sides of the metering orifice ( 136 ). A fluid pressure of the first fluid pressure chamber ( 21 ) is controlled by activation of the control valve ( 123 ). The second fluid pressure chamber ( 22 ) is shut off from the control valve ( 123 ) to introduce a pressure on the suction side at any time. To return the cam ring ( 8 ) in a direction of expanding a pump chamber ( 11 ), an internal pressure of the cam ring ( 8 ) is applied in the return direction.
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申请公布号 |
US6976830(B2) |
申请公布日期 |
2005.12.20 |
申请号 |
US20030359279 |
申请日期 |
2003.02.06 |
申请人 |
UNISIA JKC STEERING SYSTEMS CO., LTD. |
发明人 |
UCHINO KAZUYOSHI |
分类号 |
F04C2/344;B62D5/065;F04B1/06;F04B17/00;F04B49/00;F04C14/22;F04C15/00;(IPC1-7):F04B49/00;F01C21/16 |
主分类号 |
F04C2/344 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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