Control system for toroidal type continuously variable transmiss

Details Control system for toroidal type continuously variable transmiss Control system for toroidal type continuously variable transmiss

1998-03-23

1999-11-09

Herrmann, Allan D.

Friction gear transmission systems or components

Fluid control

Of toroidal transmission

477 50, B60K 4112, F16H 6130, F16H 1538

Patent

active

059804203

ABSTRACT:
A toroidal type continuously variable transmission whose gear ratio is varied by changing the position of a trunnion is provided with double-slider valves driven by stepping motors and linear solenoid valves. The gear ratio control is performed by controlling position of the double-slider valves when the vehicle travels at speeds higher than a specified speed or by controlling directly line and relief pressures applied to the trunnion through the solenoid valves.

REFERENCES:
patent: 4772249 (1988-09-01), Kouno et al.
patent: 5194052 (1993-03-01), Ueda et al.
patent: 5707313 (1998-01-01), Suzuki
European Search report, EP 98 10 5232, dated Dec. 21, 1998.

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