Planetary gear transmission systems or components – Condition responsive control – Speed responsive control adjusted or opposed by torque
Patent
1993-03-30
1996-05-07
Ta, Khoi Q.
Planetary gear transmission systems or components
Condition responsive control
Speed responsive control adjusted or opposed by torque
475262, 475266, 475330, B60K 1708, F16H 374
Patent
active
055140440
ABSTRACT:
The transmission apparatus comprises serially mounted two-speeds modules. Each module is responsive to speed and torque for shifting up when speed is relatively high and/or torque relatively low, and for shifting down in the contrary case. Speed sensitivity is provided by flyweights tending to engage a direct drive clutch. Torque sensitivity for shifting down is provided by the clutch having a limited torque capability, depending upon the force produced by the flyweights. Torque sensitivity for shifting up is provided by the helical gear teeth inducing an axial thrust which is able, or not, to oppose engagement of the clutch by the flyweights. Such a transmission apparatus can dispense with a centralized control.
REFERENCES:
patent: 1239379 (1917-09-01), Fountain
patent: 2046468 (1936-07-01), La Fountain
patent: 2201848 (1940-05-01), Cotterman
patent: 2296532 (1942-09-01), Mekeel, Jr.
patent: 2303026 (1942-11-01), Croden
patent: 3228261 (1966-01-01), Puls et al.
patent: 4450735 (1984-05-01), Koivunen et al.
patent: 4854190 (1989-08-01), Won
Antonov Automotive North America B.V.
Ta Khoi Q.
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