Title:
HYBRID SYSTEM OF CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2012/033064
Kind Code:
A1
Abstract:
On the basis of a drive torque of a hydraulic pump (3) which is detected by a torque sensor (34), in the case where an actuator drive torque is smaller than a switch torque τ0, a controller (35) closes an electromagnetic switch valve (17), causes a rotating electrical machine device (8) to function as a generator, and controls a flow rate control valve (13) with a pressure compensation function so that pressure oil supplied from the hydraulic pump (3) to a rotating hydraulic device (9) is decreased as the actuator drive torque increases, and in the case where the actuator drive torque is larger than the switch torque, the controller (35) opens the electromagnetic switch valve (17), causes the rotating electrical machine device (8) to function as an electrical motor, and controls the flow rate control valve (13) with a pressure compensation function so that discharged oil of the hydraulic pump (3) is not supplied to the rotating hydraulic device (9). As a result, a shock due to a flow rate variation is prevented when the operation state of the rotating hydraulic device and the rotating electrical machine device during the rotation of a construction machine.
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Inventors:
TSURUGA YASUTAKA (JP)
TAKAHASHI KIWAMU (JP)
ISHII HAJIME (JP)
YOSHIDA HAJIME (JP)
TAKAHASHI KIWAMU (JP)
ISHII HAJIME (JP)
YOSHIDA HAJIME (JP)
Application Number:
PCT/JP2011/070194
Publication Date:
March 15, 2012
Filing Date:
September 05, 2011
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
TSURUGA YASUTAKA (JP)
TAKAHASHI KIWAMU (JP)
ISHII HAJIME (JP)
YOSHIDA HAJIME (JP)
TSURUGA YASUTAKA (JP)
TAKAHASHI KIWAMU (JP)
ISHII HAJIME (JP)
YOSHIDA HAJIME (JP)
International Classes:
F15B11/00; E02F9/20; F15B21/14
Foreign References:
| JP3875900B2 | 2007-01-31 | |||
| JP2005195102A | 2005-07-21 | |||
| JP2004211779A | 2004-07-29 | |||
| JP2007120573A | 2007-05-17 | |||
| JP2005282643A | 2005-10-13 | |||
| JPH0478306A | 1992-03-12 | |||
| JP2001173024A | 2001-06-26 | |||
| JP3875900B2 | 2007-01-31 |
Attorney, Agent or Firm:
KASUGA Yuzuru (JP)
Kasuga 讓 (JP)
Kasuga 讓 (JP)
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Claims:
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