Continuously variable transmission

Details Continuously variable transmission Continuously variable transmission

1996-12-13

1998-11-10

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

475211, 475212, F16H 5906, F16H 3702

Patent

active

058335714

ABSTRACT:
A continuously variable transmission is switchable between the low and high modes by changing engagement between two clutches. A sensor shoe which moves in association with a movable sheave of a primary pulley is provided with an indent and a protrusion formed at different locations on the sensor shoe. In addition, indents are formed on a spool of a low-high control valve. An interlock rod is provided between the sensor shoe and the low-high control valve. In a predetermined pulley-ratio region in the low and high modes, for example, on a low pulley-ratio side, as the movable sheave moves to the O/D side a base end of the interlock rod rides on the upper surface of the sensor shoe while its opposite end is engaged within one of the indents, thus mechanically locking the low-high control valve. In this way, switching between the low and high modes due to selective engagement of the low and high clutches can be inhibited.

REFERENCES:
patent: 3375734 (1968-04-01), Lemons
patent: 3385132 (1968-05-01), Browning
patent: 3552232 (1971-01-01), Kress
patent: 4553450 (1985-11-01), Gizard
patent: 4619157 (1986-10-01), Sakai
patent: 4644820 (1987-02-01), Macey et al.
patent: 4864889 (1989-09-01), Sakakibara et al.
patent: 5092434 (1992-03-01), Smith
patent: 5669846 (1997-09-01), Moroto et al.
patent: 5690576 (1997-11-01), Moroto et al.

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