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11. 发明授权

EP1403437B1 WORKING MACHINE FAILURE DIAGNOSIS METHOD AND SYSTEM 有权
标题翻译：故障诊断系统和故障诊断方法用于作业机械
公开(公告)号：EP1403437B1
公开(公告)日：2013-12-11
申请号：EP02722854.3
申请日：2002-04-26
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： OGURA, Hiroshi , WATANABE, Hiroshi , SUGIYAMA, Genroku , KARASAWA, Hideo , UMENO, Yoshiyuki , TOMIKAWA, Osamu , MIURA, Shuichi , ONO, Kiyoshi , OCHIAI, Yasushi , SHIBATA, Koichi , ADACHI, Hiroyuki
IPC分类号： E02F9/20 , E02F9/24 , H04Q9/00 , E02F9/26 , G05B23/02 , G05B19/4063 , G05B19/418
CPC分类号： G05B23/0267 , E02F9/205 , E02F9/24 , E02F9/26 , E02F9/268 , G05B19/4063 , G05B19/4185 , G05B2219/31454 , G05B2219/33284 , G05B2219/45012 , Y02P90/86

12. 发明公开

EP1637718A1 ENGINE CONTROL DEVICE FOR CONSTRUCTION MACHINE 有权转让
标题翻译： MOTORSTEUERVORRICHTUNGFÜRBAUMASCHINE
公开(公告)号：EP1637718A1
公开(公告)日：2006-03-22
申请号：EP04746748.5
申请日：2004-06-24
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： NAKAMURA, Kazunori , ARAI, Yasushi , KOWATARI, Yoichi , ISHIKAWA, Kouji , KARASAWA, Hideo
IPC分类号： F02D41/04 , F02D41/14
CPC分类号： F02D31/007 , F02D41/12
摘要： An engine control system includes pressure sensors (73, 74), position sensors (75, 76), pressure sensors (77, 78), a target revolution speed modification value computing unit (90), and a modification value adder (70r). A target revolution speed NR2 for use in control is computed based on changes of status variables such that the target revolution speed NR2 increases from the target revolution speed NR1 applied from an input unit (71), and then moderately returns to the target revolution speed NR1. In accordance with the computed target revolution speed NR2 for use in control, a target fuel injection amount FN1 is computed and a fuel injection amount is controlled. As a result, a drop of an engine revolution speed attributable to an abrupt increase of an engine load can be suppressed without sacrificing the work efficiency, and lowering of durability caused by an excessive increase of the engine revolution speed can be prevented.
摘要翻译：发动机控制系统包括压力传感器（73,74），位置传感器（75,76），压力传感器（77,78），目标转速修正值计算单元（90）和修正值加法器（70r）。根据状态变量的变化，计算目标转速NR2，使得目标转速NR2从从输入单元（71）施加的目标转速NR1增加，然后适度地返回到目标转速NR1 。根据用于控制的计算出的目标转速NR2，计算出目标燃料喷射量FN1，控制燃料喷射量。结果，可以在不牺牲工作效率的情况下抑制归因于发动机负载突然增加的发动机转速的下降，并且可以防止由于发动机转速过大而引起的耐久性降低。

13. 发明公开

EP1630303A1 HYDRAULIC DRIVE DEVICE 失效
标题翻译：液压驱动装置
公开(公告)号：EP1630303A1
公开(公告)日：2006-03-01
申请号：EP04728031.8
申请日：2004-04-16
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： ISHIKAWA, Koji , KAJITA, Yusuke , NAKAMURA, Kazunori , SUGIYAMA, Genroku , KARASAWA, Hideo
IPC分类号： E02F9/22
CPC分类号： E02F9/2235 , E02F9/2285 , E02F9/2296
摘要： To permit using hold-side pressure oil in a first hydraulic cylinder for the acceleration of a second hydraulic cylinder upon performing a combined operation of the first and second hydraulic cylinders, a hydraulic drive system is provided with a main hydraulic pump 21, a boom cylinder 6 and an arm cylinder 7, a directional control valve 23 for a boom and a directional control valve 24 for an arm, and a boom control device 25 and an arm control device 26. The hydraulic drive system is also provided with a pressure oil feed means for feeding pressure oil in a rod chamber 6b of the boom cylinder 6 to an upstream side of the directional control valve 24 for the arm when a bottom pressure of the arm cylinder 7 has increased to a high pressure equal to or higher than a predetermined pressure. This pressure oil feed means includes a flow combiner valve 44 arranged in a reservoir line 42 which can communicate to the rod chamber 6b of the boom cylinder 6. When the bottom pressure of the arm cylinder 7 is the predetermined pressure or higher, the flow combiner valve 44 maintains a communication line 40, which communicates the reservoir line 42 and the upstream side of the directional control valve 24 for the arm with each other, in a state that pressure oil can be fed to the upstream side of the directional control valve 24 for the arm.
摘要翻译：为了在执行第一和第二液压缸的联合操作时允许在第一液压缸中使用保持侧压力油以加速第二液压缸，液压驱动系统设置有主液压泵21，动臂液压缸 6以及斗杆缸7，动臂用方向控制阀23和斗杆用方向控制阀24以及动臂控制装置25和斗杆控制装置26构成。液压驱动装置还具有压力油供给装置在斗杆油缸7的底部压力上升到规定值以上的高压时，将斗杆油缸6的活塞杆室6b内的压力油向斗杆用方向控制阀24的上游侧供给的单元压力。该压力油供给装置包括设置在能够与动臂油缸6的活塞杆室6b连通的储油管路42中的合流阀44.当臂油缸7的底部压力为预定压力或更高时，合流器阀44在将压力油供给到方向控制阀24的上游侧的状态下维持使储液器管线42与臂用方向控制阀24的上游侧连通的连通管线40 为胳膊。

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