Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid controlled mechanical clutch or brake
Reexamination Certificate
2006-12-22
2010-02-09
Estremsky, Sherry (Department: 3655)
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid controlled mechanical clutch or brake
Reexamination Certificate
active
07658691
ABSTRACT:
A modification to the manual valve of an automatic transmission is provided which improves the shift quality of the automatic transmission when the transmission is shifted from a drive gear to either Park or Neutral. More particularly, the invention provides a control orifice which regulates the release of hydraulic fluid from one or more clutch circuits such that pressure to one or more clutches is gradually released. The gradual release of pressure form the one or more clutches provides an improved shift quality. In alternate embodiments, the present invention provides a further modification to an automatic transmission which allows the control orifice to be circumvented in situations where a rapid swap of pressure from on clutch control solenoid to another is required.
REFERENCES:
patent: 3823621 (1974-07-01), Kubo et al.
patent: 4515176 (1985-05-01), McCarthy et al.
patent: 5085102 (1992-02-01), Iwase et al.
patent: 5115698 (1992-05-01), Leising et al.
patent: 5211080 (1993-05-01), Leising et al.
patent: 5730685 (1998-03-01), Younger
patent: 5890509 (1999-04-01), Becker et al.
patent: 2005/0215395 (2005-09-01), Morise et al.
Binienda Gary J.
Botosan Valentin
Champine Mark R.
Chrysler Group LLC
Estremsky Sherry
Smith Ralph E.
LandOfFree
Automatic transmission with improved shift quality does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic transmission with improved shift quality, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic transmission with improved shift quality will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4164235