Transmission ratio control system for a continuously variable tr

Details Transmission ratio control system for a continuously variable tr Transmission ratio control system for a continuously variable tr

1987-03-27

1989-04-11

Braun, Leslie A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74867, 3644241, B60K 4118

Patent

active

048195138

ABSTRACT:
A control system has a transmission ratio control valve having a spool for controlling oil supplied to a cylinder of a drive pulley to change the transmission ratio. The transmission ratio control valve has chambers at both ends of the spool. The amount of oil supplied to the chambers is controlled by a control signal which is determined by a desired transmission ratio and the actual transmission ratio, so that the transmission ratio is controlled.

REFERENCES:
patent: 4458318 (1984-07-01), Smit et al.
patent: 4466521 (1984-08-01), Hattori et al.
patent: 4515040 (1985-05-01), Takeuchi et al.
patent: 4561327 (1985-12-01), Niwa
patent: 4569254 (1986-02-01), Itoh et al.
patent: 4593582 (1986-06-01), Sawada et al.
patent: 4622865 (1986-11-01), Itoh et al.
patent: 4637279 (1987-01-01), Itoh et al.
patent: 4641553 (1987-02-01), Kobayashi
patent: 4649488 (1987-03-01), Osanai et al.
patent: 4665773 (1987-05-01), Hiramatsu et al.

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