Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Clutch control
Reexamination Certificate
2008-05-06
2008-05-06
Camby, Richard M. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Clutch control
C701S068000
Reexamination Certificate
active
10846017
ABSTRACT:
A method and apparatus to control an electrically variable transmission, by dynamically controlling system main hydraulic clutch pressures, based upon required clutch capacity, as determined by output load of the transmission. Included is a method to regulate hydraulic clutch pressure in an electrically variable transmission equipped with at least one clutch. This comprises monitoring magnitude of slippage of the clutches and controlling hydraulic boost pressure based upon the magnitude of clutch slippage. Controlling hydraulic boost pressure based upon the magnitude of clutch slippage comprises monitoring operator inputs, determining a requested operator torque command, and determining a required main boost pressure. The main boost pressure is based upon the requested operator torque command, the monitored operator inputs, parameters of the EVT and clutches. Commanded main boost pressure is then determined based upon the determined required main boost pressure.
REFERENCES:
patent: 3283862 (1966-11-01), Warnock
patent: 5931757 (1999-08-01), Schmidt
patent: 6910493 (2005-06-01), Foster et al.
Foster Michael D.
Hsieh Tung-Ming
Hubbard Gregory A.
Camby Richard M.
General Motors Corporation
LandOfFree
Method and apparatus to control hydraulic pressure in an... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus to control hydraulic pressure in an..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus to control hydraulic pressure in an... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3933694