Method of operating a clutch during a vehicle launch

Details Method of operating a clutch during a vehicle launch Method of operating a clutch during a vehicle launch

2011-03-15

2011-03-15

Tran, Khoi (Department: 3664)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

C701S001000, C701S051000, C701S058000, C701S067000, C701S070000, C477S045000, C477S046000, C477S092000, C477S175000, C477S181000

Reexamination Certificate

active

07908069

ABSTRACT:
A method of operating a clutch during vehicle launch including increasing a first hydraulic pressure in an inner chamber from a first to a second level; decreasing a second hydraulic pressure in an outer chamber from a third to a fourth level in response to engine speed and throttle position for the vehicle; and slipping the clutch in response to increasing and decreasing the first and second pressures, respectively. The first hydraulic pressure urges a clutch disposed between the engine and an impeller for a vehicle torque converter to an engaged position. The second hydraulic pressure opposes the first hydraulic pressure. In some aspects, the method includes determining a temperature for oil in a transmission in the vehicle. Then, decreasing the second hydraulic pressure includes decreasing the second pressure in response to the determined temperature. In some aspects, the clutch and the chambers are located in the torque converter.

REFERENCES:
patent: 4967884 (1990-11-01), Norcia
patent: 5180339 (1993-01-01), Haley et al.
patent: 5269726 (1993-12-01), Swanson et al.
patent: 6007452 (1999-12-01), Sawada et al.
patent: 6030313 (2000-02-01), Sawada et al.
patent: 6216081 (2001-04-01), Tabata et al.
patent: 6517465 (2003-02-01), Hrazdera
patent: 6641498 (2003-11-01), Okuwaki
patent: 7134538 (2006-11-01), Hasegawa et al.
patent: 7146262 (2006-12-01), Matsubara et al.
patent: 7359784 (2008-04-01), Murasugi et al.
patent: 7575111 (2009-08-01), Ogata et al.
patent: 2004/0204290 (2004-10-01), Ito
patent: 2004/0226795 (2004-11-01), Morise et al.
patent: 2004/0231951 (2004-11-01), Hasegawa et al.
patent: 2004/0249542 (2004-12-01), Murasugi et al.
patent: 2005/0020403 (2005-01-01), Hasegawa et al.
patent: 2005/0027424 (2005-02-01), Matsubara et al.
patent: 2007/0142174 (2007-06-01), Swank et al.
patent: 2010/0174465 (2010-07-01), Gibson et al.

Affiliated with

Also associated with

Rating

Method of operating a clutch during a vehicle launch 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 of operating a clutch during a vehicle launch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of operating a clutch during a vehicle launch will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2681551