Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1981-04-24
1985-06-11
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74862, 74864, 74870, 474 18, B60K 4112, B60K 4114
Patent
active
045220867
ABSTRACT:
The disclosed control system for a CVT controls the line pressure which is applied to the secondary pulley to maintain adequate belt tension, at a level significantly lower than previously was produced. An improved throttle valve is provided, and used in this throttle-sensitive regulation of line pressure. An improved ratio valve is provided, which combines spring and fluid forces in a manner to produce the ratio-indicating fluid signal, with negligible loading on the movable sheave where the ratio change is sensed. In the ratio-changing portion of the system, the combination of a timing valve and accumulator valve cooperate in demand type downshifts to provide adequate time for oil flow into the secondary pulley chamber as the primary pulley chamber is exhausted, to keep adequate belt tension during such a downshift.
REFERENCES:
patent: 3115049 (1963-12-01), Moan
patent: 3200666 (1965-08-01), Schrodt et al.
patent: 3600961 (1971-08-01), Rattunde
patent: 3714836 (1973-02-01), Pierce, Jr. et al.
patent: 3768339 (1973-10-01), Kolehmainen et al.
patent: 4152947 (1979-05-01), van Deursen et al.
patent: 4161894 (1979-07-01), Giacosa
patent: 4476746 (1984-10-01), Mike
Borg-Warner Corporation
Braun Leslie A.
Jennings James J.
Wright D.
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