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

1986-12-19

1988-05-31

Wright, Dirk

Machine element or mechanism

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

Preselected indexed position

3644241, B60K 4112, B60K 4118

Patent

active

047473258

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. By controlling the pressure of oil supplied to one end of the spool of the transmission ratio control valve in accordance with conditions of the engine and transmission, the spool is shifted, so that the rate of change of the transmission ratio is controlled. Actual rate of change of the transmission ratio is compared with a desired rate of change to produce an error signal. In response to the error signal, the actual rate of change is converged to the desired rate of change.

REFERENCES:
patent: 4509125 (1985-04-01), Fattic et al.
patent: 4536171 (1985-08-01), Tanaka et al.
patent: 4649487 (1987-03-01), Osanai et al.
patent: 4653004 (1987-03-01), Osanai et al.
patent: 4653006 (1987-03-01), Osanai et al.

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