Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Reexamination Certificate
2007-01-16
2007-01-16
Beaulieu, Y. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
C477S034000, C477S158000
Reexamination Certificate
active
10902242
ABSTRACT:
A line pressure variable control method for an automatic transmission uses a solenoid valve to control a line pressure according to a duty ratio thereof. The method includes determining whether a current shift range is one of forward driving shift ranges, calculating a minimum line pressure based on at least one automatic transmission operating condition if the current shift range is one of the forward driving shift ranges, and calculating a solenoid duty ratio corresponding to the calculated minimum line pressure. Determining whether there is clutch slip, calculating a solenoid correction duty ratio based on an amount of the clutch slip. If it is determined that there is clutch slip, modifying the solenoid duty ratio with the solenoid correction duty ratio and controlling the solenoid valve using the modified solenoid duty ratio.
REFERENCES:
patent: 5458545 (1995-10-01), Adam et al.
patent: 5667457 (1997-09-01), Kuriyama et al.
patent: 5916059 (1999-06-01), Takiguchi
patent: 6022293 (2000-02-01), Dourra et al.
patent: 6208498 (2001-03-01), Ueda
patent: 6832977 (2004-12-01), You
patent: 19851110 (2000-05-01), None
patent: 1020010059154 (2001-07-01), None
Beaulieu Y.
Hyundai Motor Company
Morgan & Lewis & Bockius, LLP
LandOfFree
Line pressure variable control method and system for 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 Line pressure variable control method and system for an..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Line pressure variable control method and system for an... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3749237