Method and apparatus for speed change control of an automatic tr

Details Method and apparatus for speed change control of an automatic tr Method and apparatus for speed change control of an automatic tr

1993-04-14

1995-08-29

Denion, Thomas E.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

3644241, F16H 5948

Patent

active

054455774

ABSTRACT:
During downshift operation of an automotive automatic transmission in which a lower-speed clutch for establishing a lower-speed gear is engaged while a higher-speed clutch, which has established a higher-speed gear, is disengaged, to increase the turbine rotational speed Nt toward a synchronous rotation speed Ntj associated with the lower-speed gear, speed change control is carried out according to the same control method regardless of whether the engine is in a power-on or power-off state. A target change rate (Nir)' of turbine rotational speed associated with the higher-speed clutch and a target change rate (Nia)' of turbine rotational speed associated with the lower-speed clutch are set, and a change rate (Nt)' of the turbine rotational speed is detected. The transmission torque through the higher-speed clutch is controlled in a feedback manner such that the detected change rate (Nt)' coincides with the change rate (Nir)', and also the transmission torque through the lower-speed clutch is feedback-controlled such that the change rate (Nt)' coincides with the change rate (Nia)', thereby carrying out downshift.

REFERENCES:
patent: 4665772 (1987-05-01), Greene
patent: 4843902 (1989-07-01), Patton et al.
patent: 4913004 (1990-04-01), Panoushek et al.
patent: 4947329 (1990-08-01), Benford et al.
patent: 4984483 (1991-01-01), Hiramatsu et al.
patent: 5046176 (1991-09-01), Lin
patent: 5046383 (1991-09-01), Butts et al.
patent: 5058014 (1991-10-01), Saitou et al.
patent: 5197006 (1993-03-01), Saitou et al.
patent: 5245893 (1993-09-01), Koenig et al.
patent: 5282401 (1994-01-01), Hebbale et al.

Affiliated with

Also associated with

Rating

Method and apparatus for speed change control of an automatic tr 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 for speed change control of an automatic tr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for speed change control of an automatic tr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1816826