Continuously variable powertrain

Details Continuously variable powertrain Continuously variable powertrain

1998-02-20

1999-04-20

Marmor, Charles A

Planetary gear transmission systems or components

Nonplanetary variable speed or direction transmission...

Nonplanetary transmission is belt or chain gearing

F16H 926

Patent

active

058953353

ABSTRACT:
A continuously variable transmission (CVT) of the variable belt (CVU) type provides a variable drive range. A simple planetary gearset disposed between a power source and the CVU provides a forward direct ratio and a reverse underdrive ratio. The CVT is controlled at a lower overall ratio determined by the diameter of the input sheave being controlled during the forward drive condition at a dimension M. During the reverse drive condition, the diameter of the input sheave is maintained at a larger diameter (M*R) where R is the reverse underdrive ratio of the planetary.

REFERENCES:
patent: 4467670 (1984-08-01), Kawamoto
patent: 4550629 (1985-11-01), Kawamoto
patent: 5607371 (1997-03-01), Yamaguchi

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