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1. 发明专利

DE19738119A1 System to estimate net operating time of vehicle 未知
公开(公告)号：DE19738119A1
公开(公告)日：1998-03-12
申请号：DE19738119
申请日：1997-09-01
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TANAKA YASUO , FURUNO YOSHINORI , WATANABE YUTAKA , YAGYU TAKASHI , SUGIYAMA YUKIHIKO
IPC分类号： F02D29/00 , B60K15/077 , E02F9/26 , F02D29/02 , F02D29/04 , G07C5/10 , G07C5/08
摘要： The vehicle has an engine (1) driving hydraulic pumps (7A-7C) supplying actuators (8a-8b) The engine speed is controlled by a regulator (4). The operational use of the machine is determined by measuring the engine speed (Ne) and the difference from the command value. These signals together with signals from the actuator detection circuit (10) and the fuel level sensor (6b) are fed to an arithmetic processor to determine net operating time and fuel consumption.

2. 发明专利

DE102005019599B4 未知
公开(公告)号：DE102005019599B4
公开(公告)日：2009-04-23
申请号：DE102005019599
申请日：2005-04-27
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TAKIGUCHI KAZUO , OCHIAI MASAMI , UDAGAWA TSUTOMU , UENO KATSUMI , YAGYU TAKASHI , SUGIYAMA YUKIHIKO , AIHARA MITSUO
IPC分类号： F15B13/01 , F15B13/042 , F15B11/00 , F15B11/042 , F15B11/044 , F15B11/08 , F16K31/12 , F16K31/124
摘要： The control valve apparatus holds a seat valve member in a position seated on a valve seat to thereby prevent a backward flow even if the pressure in the inlet chamber side becomes lower than the pressure in the outlet chamber side. With a pilot control valve member is in a closed state, when the pressure in the inlet chamber is higher, a pressurized medium is introduced to the control pressure chamber via a first valve unit and is cut off from the outlet chamber by a second valve unit. When the pressure in the outlet chamber is higher, the pressurized medium is introduced to the control pressure chamber via the second valve unit and is cut off from the outlet chamber by the first valve unit.

3. 发明专利

DE102005019599A1 未知
公开(公告)号：DE102005019599A1
公开(公告)日：2005-11-24
申请号：DE102005019599
申请日：2005-04-27
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TAKIGUCHI KAZUO , OCHIAI MASAMI , UDAGAWA TSUTOMU , UENO KATSUMI , YAGYU TAKASHI , SUGIYAMA YUKIHIKO , AIHARA MITSUO
IPC分类号： F15B13/042 , F15B11/00 , F15B11/042 , F15B11/044 , F15B11/08 , F15B13/01 , F16K31/12 , F16K31/124
摘要： The control valve apparatus holds a seat valve member in a position seated on a valve seat to thereby prevent a backward flow even if the pressure in the inlet chamber side becomes lower than the pressure in the outlet chamber side. With a pilot control valve member is in a closed state, when the pressure in the inlet chamber is higher, a pressurized medium is introduced to the control pressure chamber via a first valve unit and is cut off from the outlet chamber by a second valve unit. When the pressure in the outlet chamber is higher, the pressurized medium is introduced to the control pressure chamber via the second valve unit and is cut off from the outlet chamber by the first valve unit.

4. 发明专利

DE19780822T1 未知
公开(公告)号：DE19780822T1
公开(公告)日：1999-03-25
申请号：DE19780822
申请日：1997-08-07
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TANAKA YASUO , OCHIAI MASAMI , YAGYU TAKASHI , HASHIMOTO AKIRA , FURUNO YOSHINORI , WATANABE YUTAKA , SUGIYAMA YUKIHIKO
IPC分类号： E02F9/22 , E02F9/26 , F04B49/06 , F04B51/00 , F15B20/00
摘要： PCT No. PCT/JP97/02771 Sec. 371 Date Sep. 3, 1998 Sec. 102(e) Date Sep. 3, 1998 PCT Filed Aug. 7, 1997 PCT Pub. No. WO98/06946 PCT Pub. Date Feb. 19, 1998This invention relates to a fault diagnosis system for hydraulic pumps in a work vehicle, which is economical and permits sure identification of one or more trouble-developed ones of the hydraulic pumps. Pressure sensors 61-64 are arranged on pressurized fluid lines 30,40, which extend to a tank T from points immediately out of center bypasses of flow control valves 21,231-234,451-454,26 communicated to hydraulic pumps 1-6. Solenoid-operated directional control valves 51-56 are interposed in input circuits of individual regulators 11-16 so that, upon excitation, a pressure of a pilot pump 7 is introduced into the regulators 11-16. When all the flow control valves are brought into neutral positions thereof and a determination is instructed through a switch 80, one of the solenoid-operated directional control valves is excited by a signal from a processor 70 so that pressurized fluid is delivered at a maximum flow rate from the corresponding hydraulic pump. A detection value of the corresponding pressure sensor at this time is translated into a flow rate, which is then stored. These procedures are performed with respect to the individual hydraulic pumps successively. Based on a flow rate obtained in every determination, a fault diagnosis of the corresponding particular hydraulic pump is performed.

5. 发明专利

AU3869697A Measurement and display of load of excavating blasted ground 未知
公开(公告)号：AU3869697A
公开(公告)日：1998-03-19
申请号：AU3869697
申请日：1997-08-26
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TANAKA YASUO , WATANABE YUTAKA , FURUNO YOSHINORI , YAGYU TAKASHI , SUGIYAMA YUKIHIKO
IPC分类号： E02F3/42 , E02F3/43 , E02F9/20 , E02F9/26 , E21C41/26

6. 发明专利

AU3605197A System for estimating residual service time of work vehicle 未知
公开(公告)号：AU3605197A
公开(公告)日：1998-03-05
申请号：AU3605197
申请日：1997-08-27
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TANAKA YASUO , FURUNO YOSHINORI , WATANABE YUTAKA , YAGYU TAKASHI , SUGIYAMA YUKIHIKO
IPC分类号： F02D29/00 , B60K15/077 , E02F9/26 , F02D29/02 , F02D29/04 , G07C5/10 , G06F17/60 , F02B77/08

7. 发明专利

AU723725B2 System for estimating residual service time of work vehicle 未知
公开(公告)号：AU723725B2
公开(公告)日：2000-09-07
申请号：AU3605197
申请日：1997-08-27
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TANAKA YASUO , FURUNO YOSHINORI , WATANABE YUTAKA , YAGYU TAKASHI , SUGIYAMA YUKIHIKO
IPC分类号： F02D29/00 , B60K15/077 , E02F9/26 , F02D29/02 , F02D29/04 , G07C5/10 , G06F17/60 , F02B77/08

8. 发明专利

AU708692B2 Apparatus for diagnosing failure of hydraulic pump for work machine 未知
公开(公告)号：AU708692B2
公开(公告)日：1999-08-12
申请号：AU3784397
申请日：1997-08-07
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TANAKA YASUO , OCHIAI MASAMI , YAGYU TAKASHI , HASHIMOTO AKIRA , FURUNO YOSHINORI , WATANABE YUTAKA , SUGIYAMA YUKIHIKO
IPC分类号： E02F9/22 , E02F9/26 , F04B49/06 , F04B51/00 , F15B20/00
摘要： PCT No. PCT/JP97/02771 Sec. 371 Date Sep. 3, 1998 Sec. 102(e) Date Sep. 3, 1998 PCT Filed Aug. 7, 1997 PCT Pub. No. WO98/06946 PCT Pub. Date Feb. 19, 1998This invention relates to a fault diagnosis system for hydraulic pumps in a work vehicle, which is economical and permits sure identification of one or more trouble-developed ones of the hydraulic pumps. Pressure sensors 61-64 are arranged on pressurized fluid lines 30,40, which extend to a tank T from points immediately out of center bypasses of flow control valves 21,231-234,451-454,26 communicated to hydraulic pumps 1-6. Solenoid-operated directional control valves 51-56 are interposed in input circuits of individual regulators 11-16 so that, upon excitation, a pressure of a pilot pump 7 is introduced into the regulators 11-16. When all the flow control valves are brought into neutral positions thereof and a determination is instructed through a switch 80, one of the solenoid-operated directional control valves is excited by a signal from a processor 70 so that pressurized fluid is delivered at a maximum flow rate from the corresponding hydraulic pump. A detection value of the corresponding pressure sensor at this time is translated into a flow rate, which is then stored. These procedures are performed with respect to the individual hydraulic pumps successively. Based on a flow rate obtained in every determination, a fault diagnosis of the corresponding particular hydraulic pump is performed.

9. 发明专利

AU705565B2 Measurement and display of load of excavating blasted ground 未知
公开(公告)号：AU705565B2
公开(公告)日：1999-05-27
申请号：AU3869697
申请日：1997-08-26
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TANAKA YASUO , WATANABE YUTAKA , FURUNO YOSHINORI , YAGYU TAKASHI , SUGIYAMA YUKIHIKO
IPC分类号： E02F3/42 , E02F3/43 , E02F9/20 , E02F9/26 , E21C41/26

10. 发明专利

DE19780822B4 未知
公开(公告)号：DE19780822B4
公开(公告)日：2006-02-23
申请号：DE19780822
申请日：1997-08-07
申请人： HITACHI CONSTRUCTION MACHINERY
发明人： TANAKA YASUO , OCHIAI MASAMI , YAGYU TAKASHI , HASHIMOTO AKIRA , FURUNO YOSHINORI , WATANABE YUTAKA , SUGIYAMA YUKIHIKO
IPC分类号： E02F9/20 , E02F9/22 , E02F9/26 , F04B49/06 , F04B51/00 , F15B20/00
摘要： PCT No. PCT/JP97/02771 Sec. 371 Date Sep. 3, 1998 Sec. 102(e) Date Sep. 3, 1998 PCT Filed Aug. 7, 1997 PCT Pub. No. WO98/06946 PCT Pub. Date Feb. 19, 1998This invention relates to a fault diagnosis system for hydraulic pumps in a work vehicle, which is economical and permits sure identification of one or more trouble-developed ones of the hydraulic pumps. Pressure sensors 61-64 are arranged on pressurized fluid lines 30,40, which extend to a tank T from points immediately out of center bypasses of flow control valves 21,231-234,451-454,26 communicated to hydraulic pumps 1-6. Solenoid-operated directional control valves 51-56 are interposed in input circuits of individual regulators 11-16 so that, upon excitation, a pressure of a pilot pump 7 is introduced into the regulators 11-16. When all the flow control valves are brought into neutral positions thereof and a determination is instructed through a switch 80, one of the solenoid-operated directional control valves is excited by a signal from a processor 70 so that pressurized fluid is delivered at a maximum flow rate from the corresponding hydraulic pump. A detection value of the corresponding pressure sensor at this time is translated into a flow rate, which is then stored. These procedures are performed with respect to the individual hydraulic pumps successively. Based on a flow rate obtained in every determination, a fault diagnosis of the corresponding particular hydraulic pump is performed.

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