Title:
Oil pressure driver system
Document Type and Number:
Japanese Patent JP5956184
Kind Code:
B2
Abstract:
An operating state determining unit determines whether a hydraulic cylinder is in operation or not in operation. A discharge pressure reducing unit reduces the discharge pressure of a charge pump. A discharge pressure control unit controls the discharge pressure reducing unit when the hydraulic cylinder in not in operation to reduce the discharge pressure of the charge pump to a low pressure lower than a normal pressure. The normal pressure is the discharge pressure of the charge pump when the hydraulic cylinder is in operation. An accumulator is connected to a charge flowpath. A one-way valve is disposed between the accumulator and the charge pump. The one-way valve allows the flow of hydraulic fluid from the charge pump to the accumulator and prohibits the flow of hydraulic fluid from the accumulator to the charge pump.
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Inventors:
Teruo Akiyama
Noboru Iida
Kenji Oshima
Kenji Sasano
Noboru Iida
Kenji Oshima
Kenji Sasano
Application Number:
JP2012039787A
Publication Date:
July 27, 2016
Filing Date:
February 27, 2012
Export Citation:
Assignee:
KOMATSU LTD.
International Classes:
F15B21/14; E02F9/22; F15B11/00; F15B11/08
Domestic Patent References:
| JP3862256B2 | ||||
| JP200979775A | ||||
| JP66706U |
Foreign References:
| US20110030364 |
Attorney, Agent or Firm:
Shinki Global IP Patent Corporation
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