Interrelated power delivery controls – including engine control – Transmission control – Engine controlled by transmission
Reexamination Certificate
2006-07-31
2009-06-23
Estremsky, Sherry (Department: 3655)
Interrelated power delivery controls, including engine control
Transmission control
Engine controlled by transmission
C477S109000
Reexamination Certificate
active
07549946
ABSTRACT:
The invention relates to a shift control apparatus for an automatic transmission, that executes a torque reduction control when the transmission executes a second downshift in response to a second downshift determination made during first downshift. The shift control apparatus includes a multiple shift execution unit that starts the second downshift operation in response to the second downshift determination, and a torque reduction control execution unit that executes a torque reduction control when the rotational speed of the input member is increased to at least a predetermined first determination speed, which is determined in accordance with a shift ratio of a gear stage after the second downshift operation, after the second downshift starts. This allows the rotational speed of the input shaft to be quickly changed to the appropriate synchronous rotational speed. Thus, the desired driving force is provided upon completion of the second downshift without overspeeding the engine.
REFERENCES:
patent: 5012695 (1991-05-01), Kyohzuka et al.
patent: 2003/0022756 (2003-01-01), Ayabe et al.
patent: 2007/0287588 (2007-12-01), Steinhauser et al.
patent: 2007/0287591 (2007-12-01), Steinhauser et al.
patent: 2008/0064566 (2008-03-01), Lee
patent: 36 25 156 (1987-02-01), None
patent: 42 10 626 (1993-10-01), None
patent: 5-99322 (1993-04-01), None
patent: 8-244499 (1996-09-01), None
patent: 9-291835 (1997-11-01), None
patent: 10-281277 (1998-10-01), None
patent: 2002-30951 (2002-01-01), None
patent: 10-0459744 (2004-12-01), None
Ayabe Atsushi
Ishihara Hisashi
Sagawa Ayumu
Sugimura Toshio
Suzuki Toshinari
Estremsky Sherry
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Shift control apparatus and shift control method of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shift control apparatus and shift control method of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shift control apparatus and shift control method of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4120110