Speed ratio controller and control method of continuously variab

Details Speed ratio controller and control method of continuously variab Speed ratio controller and control method of continuously variab

1999-07-01

2000-11-07

Marmor, Charles A

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

701 54, 701 61, B60K 4116

Patent

active

061429082

ABSTRACT:
A gyration angle .phi. of a power roller (3) of a toroidal continuously variable transmission (10) is made to vary via a step motor (4) and control valve (5). A controller (61) calculates a feedback control amount v of a step motor (4) so that a real speed ratio i of the transmission (10) coincides with a target speed ratio i*. The controller (61) calculates a command value u by correcting a control value v based on a non-linear relation between the gyration angle .phi. and the real speed ratio i, and controls the actuator (4) based on the command value u.

REFERENCES:
patent: 4509125 (1985-04-01), Fattic et al.
patent: 4729103 (1988-03-01), Oshiage et al.
patent: 5669845 (1997-09-01), Muramoto et al.
patent: 5674145 (1997-10-01), Kidokoro et al.
patent: 5707313 (1998-01-01), Suzuki

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