HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE |
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| 申请号 | EP15815795 | 申请日 | 2015-05-26 | 公开(公告)号 | EP3165777A4 | 公开(公告)日 | 2018-04-04 |
| 申请人 | NABTESCO CORP; | 发明人 | IWASAKI HITOSHI; | ||||
| 摘要 | A recycling passage 71 is configured to perform "pressure oil recycling," in which the recycling passage 71 feeds boom discharge oil 35Fo (recycling discharge oil) discharged from a boom cylinder 23F (a recycling actuator), to the boom cylinder 23F (an actuator actuated with feeding of discharge oil from a second pump 12). A first sensing pressure rising passage 81 feeds a part of boom discharge oil 35Fo to a first unload passage 31 upstream of a first pressure sensing unit 61p when the pressure oil recycling is performed. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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