Continuously variable transmission with control arrangement and

Details Continuously variable transmission with control arrangement and Continuously variable transmission with control arrangement and

1998-12-30

2000-08-08

Battista, Mary Ann

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Speed responsive

474 18, 474 70, F16H 5900, F16H 6100, F16H 900

Patent

active

06099424&

ABSTRACT:
A continuously variable transmission, and particularly a control arrangement thereof and a method for recovering belt slippage in the transmission, are disclosed. A source of hydraulic pressure is operatively connected for driving each of the hydraulically operated actuators for axially movable sheaves of primary and secondary pulleys of the transmission. A hydraulic pressure control loop controls the hydraulic pressure applied to the actuator of the secondary pulley as a function of the load of the device being driven on the transmission and the pitch radius of the secondary pulley. An output speed control loop controls the output speed of the transmission driving the device to be driven during normal operation of the transmission. Preferably, the output speed control loop may be set to control the output speed at a constant value for driving an aircraft electric generator. A belt speed matching loop overrides the output speed control loop for adjusting the transmission ratio when a condition of belt slipping is detected to recover from belt slipping.

REFERENCES:
patent: 4729264 (1988-03-01), Sakai
patent: 4730522 (1988-03-01), Morimoto
patent: 4734082 (1988-03-01), Tezuka
patent: 4751857 (1988-06-01), Saaki
patent: 4771658 (1988-09-01), Miyawaki
patent: 4798561 (1989-01-01), Hattori et al.
patent: 5182968 (1993-02-01), Mott
patent: 5683318 (1997-11-01), Snel et al.

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