Variable displacement pump |
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| 申请号 | US15241373 | 申请日 | 2016-08-19 | 公开(公告)号 | US10018199B2 | 公开(公告)日 | 2018-07-10 |
| 申请人 | MAHLE FILTER SYSTEMS JAPAN CORPORATION; | 发明人 | Toru Shinohara; Kentaro Harada; | ||||
| 摘要 | A variable displacement pump includes: a first pressure control chamber; a second pressure control chamber; a spring arranged to urge the cam ring in a second swing direction; a hydraulic pressure supply valve arranged to be opened by a predetermined hydraulic pressure, and thereby to introduce a control hydraulic pressure to the first control chamber; a connection passage formed in the housing or the cam ring, and arranged to connect the first pressure control chamber and the second pressure control chamber; and a relief circuit arranged to connect the second pressure control chamber and a low pressure side, to be opened or closed in accordance with a swing position of the cam ring, and to be closed when the cam ring is swung by a predetermined amount in the first direction. | ||||||
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