Controller for a continuously variable transmission

Details Controller for a continuously variable transmission Controller for a continuously variable transmission

1998-08-12

2000-10-24

Nguyen, Tan

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 52, 701 61, 701 79, 477 15, 477905, G06F 1700, G06F 1900, G06F 700

Patent

active

061380709

ABSTRACT:
A controller for a continuously variable transmission of a vehicle sets a command speed ratio so that a real speed ratio approaches a target speed ratio which is set according to running conditions including throttle opening. When an upshift is performed, this controller determines, from the variation of throttle opening, whether the upshift is due to a decrease in throttle opening or whether it is another type of upshift. When it is determined that the upshift is due to throttle opening decrease, a response rate of the command speed ratio relative to the target speed ratio immediately after start of speed change is temporarily increased, and subsequently slowly decreased.

REFERENCES:
patent: 5233523 (1993-08-01), Follmer
patent: 5383812 (1995-01-01), Tibbles
patent: 5984829 (1999-11-01), Minagawa et al.

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