公开(公告)号：EP1388671A1

公开(公告)日：2004-02-11

申请号：EP02708704.8

申请日：2002-03-28

申请人： Shin Caterpillar Mitsubishi Ltd.

发明人： KONISHI, Hideo, SHIN CATERPILLAR MITSUBISHI LTD. ,  AKIYAMA, Seiichi, SHIN CATERPILLAR MITSUBISHI LTD. ,  TANAKA, Masayuki, SHIN CATERPILLAR MITSUBISHI LTD.

IPC分类号： F15B11/02 ,  E02F9/22

CPC分类号： E02F9/2285 ,  E02F3/965 ,  E02F9/2228 ,  E02F9/2242 ,  E02F9/2292 ,  F15B11/162 ,  F15B11/167 ,  F15B11/17 ,  F15B2211/3057 ,  F15B2211/3059 ,  F15B2211/3116 ,  F15B2211/6316 ,  F15B2211/6355 ,  F15B2211/7142 ,  F15B2211/781

摘要： Hydraulic oil supplied from pumps (12),(13) to an attachment actuator (60) is controlled by attachment control valves (27),(28). Hydraulic oil supplied from pumps (12),(13) to other actuators (52),(54),(56),(58) is controlled by other control valves (21) through (26). Control conditions for operating the attachment actuator (60) alone and control conditions for operating the attachment actuator (60) simultaneously with any of the other actuators (52),(54),(56),(58) are discriminated by the pilot pressure sensors (32),(34),(36),(38). Control characteristics of the attachment control valves (27),(28) are controlled by a controller (43) based on the discriminated control conditions

摘要翻译： （12），（13）和附件执行器（60）供应的液压油由附件控制阀（27），（28）控制。 从泵（12），（13）向其他执行器（52），（54），（56），（58）供应的液压油由其他控制阀（21）至（26）控制。 用于单独操作附接致动器（60）的控制条件和用于与任何其它致动器（52），（54），（56），（58）同时操作附接致动器（60）的控制条件被先导压力 传感器（32），（34），（36），（38）。 基于所识别的控制条件控制器（43）控制附件控制阀（27），（28）的控制特性，

公开(公告)号：EP1164297A4

公开(公告)日：2003-04-16

申请号：EP01946922

申请日：2001-01-24

申请人： HITACHI CONSTRUCTION MACHINERY ,  NAT AEROSPACE LAB

发明人： NAKATANI KENICHIRO ,  KANAI TAKASHI ,  TSURUGA YASUTAKA ,  KAWAMOTO JUNYA ,  HAMAMOTO SATOSHI ,  OKAZAKI YASUHARU ,  NAGAO YUKIAKI

IPC分类号： E02F9/22 ,  F15B11/16 ,  F15B11/00 ,  F15B11/05 ,  F15B20/00

CPC分类号： F15B11/167 ,  E02F9/22 ,  E02F9/2225 ,  E02F9/2232 ,  E02F9/226 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/05 ,  F15B11/165 ,  F15B2211/20553 ,  F15B2211/20584 ,  F15B2211/253 ,  F15B2211/30505 ,  F15B2211/30535 ,  F15B2211/30555 ,  F15B2211/3105 ,  F15B2211/3144 ,  F15B2211/31576 ,  F15B2211/324 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/40507 ,  F15B2211/6054 ,  F15B2211/6055 ,  F15B2211/6346 ,  F15B2211/6355

摘要： A hydraulic driving device, comprising a pressure compensating valve in an LS system, wherein an actuator lock switching valve (50), allowing a drain line (52) and a pilot line (53) to communicate with each other when the valve is switched to position (C) and allowing pilot lines (51) and (53) to communicate with each other when the valve is switched to position (D), is provided therein, the pilot line (51) is connected to a delivery line (7) of a hydraulic pump (10), the pilot line (53) is connected to pressure receiving parts (28a, 28b) provided at the closing operation side end part of pressure compensating valves (21a, 21b), and the actuator lock switching valve (50) having a pressure receiving part (55) connected to the output side of a pilot lock switching valve (43) is switched in conjunction with the switching of the switching valve (43), whereby, even when the drive device contains a directional control valve of mechanical switching system or a directional control valve of mechanical switching system is added, the actuator can be locked with a simple structure so as to prevent an erroneous operation from occurring when the drive device is not operated during engine driving.

公开(公告)号：EP1291467A1

公开(公告)日：2003-03-12

申请号：EP01932085.2

申请日：2001-05-16

申请人： KOBELCO CONSTRUCTION MACHINERY CO., LTD.

发明人： YOSHIMATSU, Hideaki, c/o KOBE CORPORATE RES. LAB.

IPC分类号： E02F9/20 ,  E02F9/22

CPC分类号： E02F9/2292 ,  E02F9/2012 ,  E02F9/2075 ,  E02F9/2095 ,  E02F9/2228 ,  F15B11/165 ,  F15B11/167 ,  F15B21/087 ,  F15B2211/205 ,  F15B2211/20515 ,  F15B2211/20523 ,  F15B2211/20561 ,  F15B2211/20584 ,  F15B2211/212 ,  F15B2211/30505 ,  F15B2211/3051 ,  F15B2211/30525 ,  F15B2211/3056 ,  F15B2211/3111 ,  F15B2211/3127 ,  F15B2211/3133 ,  F15B2211/31576 ,  F15B2211/327 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/45 ,  F15B2211/455 ,  F15B2211/46 ,  F15B2211/50518 ,  F15B2211/5151 ,  F15B2211/63 ,  F15B2211/6316 ,  F15B2211/6355 ,  F15B2211/6658 ,  F15B2211/67 ,  F15B2211/7135

摘要： First and second hydraulic pumps 15, 16 each adapted to operate plural actuators are activated by separate electric motors 13 and 14, respectively, and in accordance with signals which are provided from a controller 32 on the basis of operations of levers 26∼31, the number of revolutions of the electric motor 13 and that of the electric motor 14 are controlled each independently and simultaneously to control the discharge rates of both hydraulic pumps 15 and 16.

摘要翻译： 分别适于操作多个致动器的第一和第二液压泵15,16分别由分立的电动机13和14启动，并且根据从控制器32基于杆26〜31的操作提供的信号， 电动机13的转速和电动机14的转速分别独立地同时被控制，以控制两个液压泵15和16的排量。

公开(公告)号：EP1260716A1

公开(公告)日：2002-11-27

申请号：EP01271500.9

申请日：2001-12-17

申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

发明人： NAKAMURA, Kazunori

IPC分类号： F15B21/04 ,  F15B11/00 ,  E02F9/22

CPC分类号： E02F9/2235 ,  E02F9/2246 ,  E02F9/226 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/167 ,  F15B11/17 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/25 ,  F15B2211/30505 ,  F15B2211/3116 ,  F15B2211/329 ,  F15B2211/575 ,  F15B2211/6309 ,  F15B2211/6316 ,  F15B2211/633 ,  F15B2211/6343 ,  F15B2211/6355 ,  F15B2211/6651 ,  F15B2211/6652 ,  F15B2211/7058 ,  F15B2211/71

摘要： To provide a control system, which can realize a saving in energy and an improvement in the efficiency of work, for a construction machine having an engine 1, hydraulic pumps 2,3, pump regulators 8,9, a fuel injection system 13, hydraulic actuators 15, control valves 14 including plural flow control valves, and control devices 16, a controller 17 is constructed including an engine speed control means for correcting an inputted reference target engine speed NRO to obtain a corrected target engine speed NROO, a pump absorption torque control means 26 for determining a target maximum pump absorption torque value TRO, and a first correcting means for correcting the corrected target engine speed NROO and the target maximum pump absorption torque value TRO into a new target engine speed NRO1 and a new target maximum pump absorption torque TR1, respectively, in accordance with a coolant temperature signal TH1 detected by a coolant temperature detector 7.

摘要翻译： 为了提供一种能够实现节能和提高工作效率的控制系统，对于具有发动机1的工程机械，液压泵2,3，泵调节器8,9，燃料喷射系统13，液压 执行器15，包括多个流量控制阀的控制阀14和控制装置16构成，控制器17包括用于校正输入的基准目标发动机转速NRO以获得校正的目标发动机转速NROO的发动机速度控制装置， 用于确定目标最大泵吸收转矩值TRO的控制装置26以及用于将校正的目标发动机转速NROO和目标最大泵吸收转矩值TRO校正为新的目标发动机转速NRO1和新的目标最大泵吸收的第一校正装置 分别根据由冷却剂温度检测器7检测出的冷却剂温度信号TH1的转矩TR1

公开(公告)号：EP0709578B1

公开(公告)日：2000-12-06

申请号：EP95630079.2

申请日：1995-07-11

申请人： Volvo Construction Equipment Korea Co., Ltd.

发明人： Chung, Dae Seung

IPC分类号： F15B11/16

CPC分类号： F15B11/167 ,  F15B2211/3116 ,  F15B2211/355 ,  F15B2211/67 ,  F15B2211/71 ,  F15B2211/857

公开(公告)号：EP0809737B1

公开(公告)日：1999-06-16

申请号：EP96903123.6

申请日：1996-02-22

申请人： Ultronics Limited

发明人： TURNER, Stephen, Brian ,  LAKIN, David, Franz

IPC分类号： E02F9/20 ,  E02F9/22 ,  F15B11/05

CPC分类号： F15B11/167 ,  E02F9/2025 ,  E02F9/2228 ,  E02F9/2285 ,  F15B11/163 ,  F15B21/087 ,  F15B2211/3057 ,  F15B2211/327 ,  F15B2211/50536 ,  F15B2211/5157 ,  F15B2211/575 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/634 ,  F15B2211/6654

摘要： An electrohydraulic proportional control valve assembly (1) for controlling a bidirectional fluid actuated device (7) has a first actuating port (4) for bidirectional fluid flow between the assembly and a first port of the device (7), a second actuating port (5) for bidirectional fluid flow between the assembly and a secondport of the device (7), a pump port (15, 16) for input fluid flow from a pump (17), and a tank port (18, 19) for output fluid flow from a tank (20). The assembly (1) comprises a first spool valve (2) connected to the first actuating port (4), the pump port (15, 16) and the tank port (18, 19) for controlling the direction and rate of fluid flow to and from the first port of the device (7), and a second spool valve (3) connected to the second actuating port (5), the pump port (15, 16) and the tank port (18, 19) and operable independently of the first pool valve 2 for controlling the direction and rate of fluid flow to and from the second port of the device (7). A position sensing arrangement (23, 24) is provided for supplying electrical position signals indicative of the actual positions of the spools (12, 13) of the first and second spool valves (2, 3) and a pressure sensing arrangement (26, 27, 28 and 29) is provided for supplying electrical pressure signals indicative of the fluid pressures in the first and second actuating ports (4, 5), the pump port (15, 16) and the tank port (18, 19). A servo control (not shown) controls the positions of the first and second spools (2, 3) in dependence on the electrical position and pressure signals and in response to an electrical demand signal provided in response to operator actuation, in order to set the throughflow cross sections for fluid flow to effect the required control of the device (7).