Title:
車両用動力伝達装置の油圧制御回路
Document Type and Number:
Japanese Patent JP6834878
Kind Code:
B2
Abstract:
To secure evacuation travel performance by establishing a specific travel mode at the time of all-off fail of plural electro-magnetic valves that supply respective plural engagement devices with engagement hydraulic pressure.SOLUTION: In a hydraulic pressure control circuit 60, either electro-magnetic valve of linear solenoid valves SL1,SL3 is a normal-open electro-magnetic valve, while another of the electro-magnetic valve thereof and the linear solenoid valves SL2 are normal-close electro-magnetic valves. In an all-off fail state of the linear solenoid valves SL1,SL2,SL3, an engagement device of either of clutches CL1 and CLc is supplied with engagement hydraulic pressure, and therefore an U/DHV mode or O/DHV mode is established to enable an evacuation travel. Therefore, it is possible to establish a specific travel mode at the time of all-off fail of the linear solenoid valves SL1,SL2,SL3, thus securing evacuation travel performance.SELECTED DRAWING: Figure 2
Inventors:
Hirota Fujii
Atsushi Tabata
Tatsuya Imamura
Koichi Okuda
Atsushi Tabata
Tatsuya Imamura
Koichi Okuda
Application Number:
JP2017181660A
Publication Date:
February 24, 2021
Filing Date:
September 21, 2017
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F16H61/18
Domestic Patent References:
| JP2016150675A | ||||
| JP2006282070A | ||||
| JP2012225420A | ||||
| JP2015222091A |
Attorney, Agent or Firm:
Haruyuki Ikeda
Kojiro Ikeda
Kojiro Ikeda