Control system for variation of the sheave ratio in a continuous

Details Control system for variation of the sheave ratio in a continuous Control system for variation of the sheave ratio in a continuous

1992-12-14

1993-12-07

Bui, Thuy M.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

474 18, F16H 700

Patent

active

052679071

ABSTRACT:
A control system for a continuously variable transmission reduces the noise generated as a result of the use of an articulated belt for connecting the first and second variable pulleys. The control system dithers the ratio set point in order to prevent a cyclic repetition of the forces between the belt and the pulleys. This reduces the amplitude of noise peaks generated at discrete frequencies by operation of the transmission resulting in a decrease in the level of perceived noise.

REFERENCES:
patent: 3720113 (1973-03-01), Van Doorne et al.
patent: 4313730 (1982-02-01), Cole et al.
patent: 4516963 (1985-05-01), Mott
patent: 4516964 (1985-05-01), Laster
patent: 4516965 (1985-05-01), Mott
patent: 4579021 (1986-04-01), Yamamuro et al.
patent: 4650445 (1987-03-01), Mott
patent: 4853858 (1989-08-01), Kumura
patent: 5194049 (1993-03-01), Knop, Jr.

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