Line pressure control of hydraulic control system for automatic

Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position

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74867, B60K 4116

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active

045639183

ABSTRACT:
A hydraulic control system comprises a pressure regulator valve which generates a line pressure in response to a throttle related pressure and a cut back pressure. The throttle related pressure varies in a pattern corresponding to the pattern of output torque of an engine. The cut back pressure appears at low rotational speeds of a transmission output shaft and varies with an increase in the degree of throttle opening and decreases with an increase of rotational speed of the transmission output shaft. The line pressure, therefore, varies in a pattern corresponding to the pattern of torque supplied to a transmission input shaft through a torque converter.

REFERENCES:
patent: 3327554 (1967-06-01), Searles
patent: 3362261 (1968-01-01), Snyder et al.
patent: 3393585 (1968-07-01), Pierce, Jr.
patent: 3400613 (1968-09-01), Johnson et al.
patent: 3613484 (1971-10-01), Pierce et al.
patent: 3714836 (1973-02-01), Pierce, Jr. et al.
patent: 3908485 (1975-09-01), Miyauchi et al.
patent: 4301697 (1981-11-01), Iwanaga et al.
patent: 4334441 (1982-06-01), Iwanaga et al.
Patent Abstracts of Japan, vol. 6, No. 101, Jun. 10, 1982, p. M-135.

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