Title:
HYDRAULIC CIRCUIT DEVICE
Document Type and Number:
Japanese Patent JP2018021591
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce a leak amount of a working fluid of a clutch control linear solenoid, to reduce a capacity of an oil pump, to improve the transmission efficiency of an automatic transmission, and to improve fuel economy.SOLUTION: In a vehicle having an oil pump, an automatic transmission, a plurality of clutches and linear solenoids for making the clutches engaged while responding to the respective clutches, a hydraulic circuit device for supplying working fluids to a plurality of the linear solenoids comprises: a first selector valve for selectively supplying the working fluid to a part of a plurality of the linear solenoids; a second selector valve for further supplying the working fluid to at least a part of remaining parts of a plurality of the linear solenoids; a third selector valve which supplies the working fluids to the remaining parts of a plurality of the linear solenoids, and to which the working fluid is supplied from the second selector valve; and a manual valve. The hydraulic circuit device supplies the working fluid to the linear solenoid corresponding to the clutch which necessitates an engagement state in order to obtain a prescribed gear change stage out of a plurality of the linear solenoids.SELECTED DRAWING: Figure 1
Inventors:
NAGASATO YU
Application Number:
JP2016152259A
Publication Date:
February 08, 2018
Filing Date:
August 02, 2016
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F16H61/00; F16K31/06
Attorney, Agent or Firm:
Sakai International Patent Office
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