Continuously variable V-belt transmission including hydrodynamic

Details Continuously variable V-belt transmission including hydrodynamic Continuously variable V-belt transmission including hydrodynamic

1982-03-26

1985-04-16

Herrmann, Allan D.

Machine element or mechanism

Gearing

With fluid drive

74731, 474 11, 474 28, 474 70, 192 331, 192 333, 192 357, F16H 4700, F16H 5552, F16D 3300, F16D 3500

Patent

active

045108226

ABSTRACT:
A continuously variable V-belt transmission comprises a hydrodynamic transmission unit including a lock-up means. A switch valve is provided which is responsive to fluid pressure in a cylinder chamber of a drive pulley, which fluid pressure being indicative of the reduction ratio of a continuously variable V-belt transmission unit. The lock-up means is engaged in response to the state of the switch valve to lock the hydrodynamic transmission unit when the reduction ratio is small. The switch valve may be responsive to stator reaction of a stator of the hydrodynamic transmission unit so that the lock-up means is released as long as the hydrodynamic transmission unit multiply torque.

REFERENCES:
patent: 3451283 (1969-06-01), Rattunde
patent: 3526305 (1970-09-01), August
patent: 3949847 (1976-04-01), Hoehn
patent: 4099603 (1978-07-01), Peppel
patent: 4125037 (1978-11-01), Palmer et al.
patent: 4176564 (1979-12-01), Ahlen et al.
patent: 4270636 (1981-06-01), Sunohara et al.
patent: 4274520 (1981-06-01), Van der Hardt Aberson
patent: 4304150 (1981-12-01), Lupo et al.
patent: 4349088 (1982-09-01), Ito et al.

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