Control of an infinitely variable transmission of a motor vehicl

Details Control of an infinitely variable transmission of a motor vehicl Control of an infinitely variable transmission of a motor vehicl

1981-04-08

1984-08-28

Herrmann, Allan D.

Machine element or mechanism

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

Preselected indexed position

74859, 74860, 74872, B60K 4112, B60K 4116

Patent

active

044676743

ABSTRACT:
Apparatus for controlling the transmission ratio of an infinitely variable motor vehicle transmission of the type including a belt and two pulleys each having conical discs which are hydraulically movable toward and away from each other, the apparatus including a hydraulic valve having an axially movable internal pilot slide for supplying and exhausting hydraulic fluid to the movable pulley discs to effect movement thereof, a first device responsive to actual engine speed for urging the slide in a first direction, a second device responsive to desired engine speed for applying an urging force on the slide in a second, opposite direction, and a third device for limiting the resulting urging force on the slide in the second direction, the third means being responsive to the transmission ratio.

REFERENCES:
patent: 3043152 (1962-07-01), Karig et al.
patent: 3052132 (1962-09-01), Dittrich et al.
patent: 3200666 (1965-08-01), Schrodt et al.
patent: 3256747 (1966-06-01), Kempson
patent: 3360069 (1967-12-01), Chana et al.
patent: 3395586 (1968-08-01), Kirchner
patent: 3600961 (1971-08-01), Rattunde
patent: 3893344 (1975-07-01), Dantlgraber
patent: 3941016 (1976-03-01), Will
patent: 3943715 (1976-03-01), Miyao
patent: 4094203 (1978-06-01), van Deursen
patent: 4152947 (1979-05-01), van Deursen
patent: 4161894 (1979-07-01), Giacosa
patent: 4229988 (1980-10-01), Rattunde

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