Title:
POWER TRANSMITTING DEVICE FOR VEHICLE
Document Type and Number:
WIPO Patent Application WO/2023/175914
Kind Code:
A1
Abstract:
A first variable relief valve (51A) cuts off the flow of hydraulic oil from a first main line (37A) to a second main line (37B) when the pressure in the first main line (37A) is a first pressure or less and opens the flow when the pressure exceeds the first pressure. A second variable relief valve (51B) cuts off the flow of hydraulic oil from the second main line (37B) to the first main line (37A) when the pressure in the second main line (37B) is a second pressure or less and opens the flow when the pressure exceeds the second pressure. The first pressure for the first variable relief valve (51A) is set higher than the second pressure for the second variable relief valve (51B) to thereby set the "power transmission capacity from a first hydraulic pump motor (36) to a second hydraulic pump motor (38)" and the "power transmission capacity from the second hydraulic pump motor (38) to the first hydraulic pump motor (36)" to mutually different magnitudes.
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Inventors:
NAKAGAKI MAKOTO (JP)
KOINUMA TAKUMA (JP)
KOINUMA TAKUMA (JP)
Application Number:
PCT/JP2022/012643
Publication Date:
September 21, 2023
Filing Date:
March 18, 2022
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F16H47/04; F16H61/4043
Domestic Patent References:
| WO2018199301A1 | 2018-11-01 |
Foreign References:
| JP2020200676A | 2020-12-17 | |||
| JP2005090573A | 2005-04-07 | |||
| JP2009079704A | 2009-04-16 | |||
| JP2008039013A | 2008-02-21 |
Attorney, Agent or Firm:
HIROWA PATENT FIRM (JP)
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