Control system for an infinitely variable transmission

Details Control system for an infinitely variable transmission Control system for an infinitely variable transmission

1986-04-04

1988-01-26

Braun, Leslie

Machine element or mechanism

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

Preselected indexed position

74868, B60K 4116

Patent

active

047210192

ABSTRACT:
A control system for an infinitely variable transmission 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. By controlling the pressure of oil supplied to the chambers in accordance with the difference between a desired transmission ratio and the actual transmission ratio, the spool is shifted, so that the speed of changing the transmission ratio is controlled.

REFERENCES:
patent: 4369675 (1983-01-01), Van Deursen
patent: 4458318 (1984-07-01), Smit et al.
patent: 4462275 (1984-07-01), Mohl et al.
patent: 4466521 (1984-08-01), Hattori et al.
patent: 4475416 (1984-10-01), Underwood
patent: 4509125 (1985-04-01), Fattic et al.
patent: 4534243 (1985-08-01), Yokoyama et al.
patent: 4547178 (1985-10-01), Hayakawa et al.
patent: 4559850 (1985-12-01), Sakakibara
patent: 4565110 (1986-01-01), Ito
patent: 4584907 (1986-04-01), Niwa et al.

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