Pressure control system for automatic transmission

Details Pressure control system for automatic transmission Pressure control system for automatic transmission

2006-01-17

2008-12-09

Lewis, Tisha D (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C477S079000, C475S120000

Reexamination Certificate

active

07462131

ABSTRACT:
A pressure control system of an automatic transmission includes a control-pressure regulating valve, a path switching valve, and a coupling-pressure regulating valve. The path switching valve selectively outputs a control pressure or a line pressure, so that the coupling-pressure regulating valve regulates a coupling pressure based on the control pressure during gear shifting, and regulates the coupling pressure based on the line pressure after completion of the gear shifting.

REFERENCES:
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patent: 5486146 (1996-01-01), Asahara et al.
patent: 7300383 (2007-11-01), Nozaki et al.
patent: 2007/0149355 (2007-06-01), Shin et al.
patent: 06-328950 (1994-11-01), None
patent: 2000-239278 (2000-09-01), None
patent: 2002-195376 (2002-07-01), None

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