Continuously variable transmission control method and apparatus

Details Continuously variable transmission control method and apparatus Continuously variable transmission control method and apparatus

1997-03-11

1998-09-08

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

477 46, 477 48, 701 61, B60K 4112

Patent

active

058038620

ABSTRACT:
A method and apparatus for controlling a transmission for use with an automotive vehicle including an engine. The transmission coupled to the engine for transmitting a torque inputted thereto from the engine to produce an output torque at a continuously variable speed ratio. A target value for the speed ratio is calculated based on vehicle operating conditions. A rate at which the speed ratio changes to the calculated target value is calculated. An upper limit for the rate is calculated to satisfy such a condition that the transmission input torque is less than a maximum value below which there is no danger of damaging the transmission. The rate of change of the speed ratio is limited to the upper limit when the calculated rate of change of the speed ratio is greater than the upper limit.

REFERENCES:
patent: 4649487 (1987-03-01), Osanai et al.
patent: 4715258 (1987-12-01), Shigematsu et al.
patent: 4727771 (1988-03-01), Niwa et al.
patent: 4827803 (1989-05-01), Miyawaki et al.
patent: 5628705 (1997-05-01), Kashiwabara et al.
patent: 5671137 (1997-09-01), Ishino et al.

Affiliated with

Also associated with

Rating

Continuously variable transmission control method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Continuously variable transmission control method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuously variable transmission control method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1277335