发明申请
- 专利标题： HYDRAULIC CONTROL APPARATUS FOR WORK MACHINE
- 专利标题（中）： 液压控制装置
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申请号： US13265750申请日： 2010-08-17
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公开(公告)号： US20120036845A1公开(公告)日： 2012-02-16
- 发明人: Hiroyasu Nishikawa , Seiichi Akiyama , Yusuke Shimizu , Atsunobu Doi , Sei Shimahara , Manabu Nakanishi , Masashi Shibata
- 申请人： Hiroyasu Nishikawa , Seiichi Akiyama , Yusuke Shimizu , Atsunobu Doi , Sei Shimahara , Manabu Nakanishi , Masashi Shibata
- 优先权： JP2009-204340 20090904
- 国际申请： PCT/JP2010/063870 WO 20100817
- 主分类号： F15B15/02
- IPC分类号： F15B15/02
摘要：
A hydraulic pump driven by an engine, a hydraulic actuator, and a negative control circuit are provided on an open center hydraulic circuit, for guiding the hydraulic pressure in the center bypass to the hydraulic pump, as a negative control pressure. A negative control pressure control device controls the negative control pressure to an arbitrary value is also provided. The pump characteristic of the hydraulic pump is set such that the discharge flow rate is minimized when the negative control pressure in the negative control circuit is equal to or greater than a first predetermined pressure. Furthermore, an idling detection device that detects whether the hydraulic actuator is in a non-operated state or not is provided. The negative control pressure is forcefully controlled to the first predetermined pressure or higher when the non-operating state is detected.
公开/授权文献
- US08899035B2 Hydraulic control apparatus for work machine 公开/授权日：2014-12-02
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