Transmission controller for continuously variable...

Details Transmission controller for continuously variable... Transmission controller for continuously variable...

2008-04-01

2008-04-01

Wright, Dirk (Department: 3681)

Planetary gear transmission systems or components

Input from independent power sources

Including electric motor input

Reexamination Certificate

active

07351173

ABSTRACT:
A transmission controller for a continuously variable transmission system steadily returns a gear ratio toward the low-ratio range during deceleration, even in a hybrid vehicle which stops an engine during deceleration. A control unit determines the return-start number of revolutions of a driving pulley and the duty ratio of an actuator and issues a control instruction to the actuator which changes the gear ratio by varying the groove width of the driving pulley. The control instruction is issued after an engine stop instruction from a drive control element and the return-start number of revolutions is set higher as the gear ratio is closer to the top-ratio range.

REFERENCES:
patent: 6427793 (2002-08-01), Hanada et al.
patent: 6547024 (2003-04-01), Ohyama et al.
patent: 6602157 (2003-08-01), Kashiwase
patent: 6663524 (2003-12-01), Gu et al.
patent: 7255188 (2007-08-01), Tsukada et al.
patent: 6-249328 (1994-09-01), None

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