System for controlling the transmission ratio of an infinitely v

Details System for controlling the transmission ratio of an infinitely v System for controlling the transmission ratio of an infinitely v

1985-04-12

1987-07-21

Braun, Leslie

Machine element or mechanism

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

Preselected indexed position

74866, 74877, 192 356, B60K 4116

Patent

active

046809902

ABSTRACT:
An infinitely variable transmission has a primary pulley having a hydraulically shiftable disc and a hydraulic cylinder for operating the disc, a secondary pulley having a hydraulically shiftable disc and a hydraulic cylinder for operating the disc, and a belt engaged with both pulleys. A hydraulic circuit having a transmission ratio control valve is provided for shifting the disc of the primary pulley in the downshift direction and upshift direction. The transmission ratio control valve is operated to shift the disc of the primary pulley in the downshift direction when the throttle valve of the engine is rapidly opened for accelerating the engine.

REFERENCES:
patent: 4387608 (1983-06-01), Mohl et al.
patent: 4438664 (1984-03-01), Fiala
patent: 4457411 (1984-07-01), Hiramatsu
patent: 4458318 (1984-07-01), Smit et al.
patent: 4459879 (1984-07-01), Miki et al.
patent: 4462275 (1984-07-01), Mohl et al.
patent: 4484672 (1984-11-01), Takano et al.
patent: 4534243 (1985-08-01), Yokoyama et al.
patent: 4546673 (1985-10-01), Shigematsu et al.
patent: 4547178 (1985-10-01), Hayakawa et al.

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