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公开(公告)号:US09022749B2
公开(公告)日:2015-05-05
申请号:US12935641
申请日:2009-03-30
Applicant: Teruo Akiyama , Hisashi Asada , Jin Kitajima , Kazuhiro Maruta , Takeshi Ooi , Masashi Ichihara
Inventor: Teruo Akiyama , Hisashi Asada , Jin Kitajima , Kazuhiro Maruta , Takeshi Ooi , Masashi Ichihara
CPC classification number: E02F9/2235 , E02F9/123 , E02F9/2285 , E02F9/2296 , F15B11/055 , F15B2211/20546 , F15B2211/26 , F15B2211/3052 , F15B2211/3116 , F15B2211/31576 , F15B2211/329 , F15B2211/50518 , F15B2211/6309 , F15B2211/6316 , F15B2211/6333 , F15B2211/6346 , F15B2211/7058
Abstract: The system includes: a variable displacement hydraulic pump supplying pressure oil to a hydraulic actuator; a pressure detector detecting a pump discharge pressure from the hydraulic pump; a control valve controlling a supply of the pressure oil to the hydraulic actuator; a controller controlling a pump displacement of the hydraulic pump; a hydraulic motor rotating an upper structure of the construction machine; a swing relief valve defining a relief pressure of the hydraulic motor; and a control lever switching a control valve for the hydraulic motor. The controller includes: an adjuster that, when a pump discharge pressure detected by the pressure detector exceeds a first set value, conducts an adjustment to reduce the pump displacement; and a canceller that cancels the adjustment when the pump discharge pressure falls below a second set value. The second set value is equal to or larger than the first set value.
Abstract translation: 该系统包括:向液压致动器供应压力油的可变排量液压泵; 压力检测器,检测来自液压泵的泵排出压力; 控制阀,控制向液压致动器供给压力油; 控制所述液压泵的泵排量的控制器; 旋转施工机械的上部结构的液压马达; 限定液压马达的溢流压力的摆动释放阀; 以及切换用于液压马达的控制阀的控制杆。 控制器包括:调节器,当由压力检测器检测到的泵排出压力超过第一设定值时,进行调节以减小泵的排量; 以及当泵排出压力低于第二设定值时抵消调节的消除器。 第二设定值等于或大于第一设定值。
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2.
公开(公告)号:US20110020146A1
公开(公告)日:2011-01-27
申请号:US12935641
申请日:2009-03-30
Applicant: Teruo Akiyama , Hisashi Asada , Jin Kitajima , Kazuhiro Maruta , Takeshi Ooi , Masashi Ichihara
Inventor: Teruo Akiyama , Hisashi Asada , Jin Kitajima , Kazuhiro Maruta , Takeshi Ooi , Masashi Ichihara
IPC: F04B49/00
CPC classification number: E02F9/2235 , E02F9/123 , E02F9/2285 , E02F9/2296 , F15B11/055 , F15B2211/20546 , F15B2211/26 , F15B2211/3052 , F15B2211/3116 , F15B2211/31576 , F15B2211/329 , F15B2211/50518 , F15B2211/6309 , F15B2211/6316 , F15B2211/6333 , F15B2211/6346 , F15B2211/7058
Abstract: The system includes: a variable displacement hydraulic pump supplying pressure oil to a hydraulic actuator; a pressure detector detecting a pump discharge pressure from the hydraulic pump; a control valve controlling a supply of the pressure oil to the hydraulic actuator; a controller controlling a pump displacement of the hydraulic pump; a hydraulic motor rotating an upper structure of the construction machine; a swing relief valve defining a relief pressure of the hydraulic motor; and a control lever switching a control valve for the hydraulic motor. The controller includes: an adjuster that, when a pump discharge pressure detected by the pressure detector exceeds a first set value, conducts an adjustment to reduce the pump displacement; and a canceller that cancels the adjustment when the pump discharge pressure falls below a second set value. The second set value is equal to or larger than the first set value.
Abstract translation: 该系统包括:向液压致动器供应压力油的可变排量液压泵; 压力检测器,检测来自液压泵的泵排出压力; 控制阀,控制向液压致动器供给压力油; 控制所述液压泵的泵排量的控制器; 旋转施工机械的上部结构的液压马达; 限定液压马达的溢流压力的摆动释放阀; 以及切换用于液压马达的控制阀的控制杆。 控制器包括:调节器,当由压力检测器检测到的泵排出压力超过第一设定值时,进行调节以减小泵的排量; 以及当泵排出压力低于第二设定值时抵消调节的消除器。 第二设定值等于或大于第一设定值。
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