Method and apparatus for speed change control of an automotive a

Details Method and apparatus for speed change control of an automotive a Method and apparatus for speed change control of an automotive a

1994-06-13

1995-08-22

Denion, Thomas E.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477143, F16H 540

Patent

active

054434327

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)'. Further, 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: 4807496 (1989-02-01), Hayasaki
patent: 4913004 (1990-04-01), Panoushek et al.
patent: 4943920 (1990-07-01), Hiramatsu et al.
patent: 4984483 (1991-01-01), Hiramatsu et al.
patent: 4998451 (1991-03-01), Sano
patent: 5046176 (1991-09-01), Lin
patent: 5058014 (1991-10-01), Saitou et al.
patent: 5063814 (1991-11-01), Baba et al.
patent: 5119697 (1992-06-01), Vukovich et al.
patent: 5123302 (1992-06-01), Brown et al.

Affiliated with

Also associated with

Rating

Method and apparatus for speed change control of an automotive a 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 automotive a, 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 automotive a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2137510