Oil pressure supply device

Details Oil pressure supply device Oil pressure supply device

2008-02-27

2009-11-24

Pang, Roger (Department: 3655)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C477S127000, C475S209000

Reexamination Certificate

active

07621845

ABSTRACT:
An oil pressure control circuit includes an oil pump for outputting an oil pressure from each of a first port and a second port, a lockup control valve for making a switchover between a state in which a secondary pressure is supplied to an engagement-side oil chamber of a torque converter and a state in which a secondary pressure is supplied to a release-side oil chamber of the torque converter, in accordance with an oil pressure supplied from a first solenoid valve, a garage shift control valve for maintaining a supply source of an oil pressure when an oil pressure is supplied from the first solenoid valve, and a port switchover valve for shutting off the first port of the oil pump from a line-pressure oil passage when an oil pressure is supplied from each of both the first solenoid valve and a second solenoid valve.

REFERENCES:
patent: 5776028 (1998-07-01), Matsuda et al.
patent: 6612958 (2003-09-01), Imai et al.
patent: 7128688 (2006-10-01), Katou
patent: 2003/0083169 (2003-05-01), Iwata et al.
patent: 2003/0119618 (2003-06-01), Iwata et al.
patent: 3-213773 (1991-09-01), None

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