Line pressure control device of an automatic transmission

Details Line pressure control device of an automatic transmission Line pressure control device of an automatic transmission

1980-04-01

1983-06-21

Byers, Jr., Nile C.

Machine element or mechanism

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

Preselected indexed position

74866, B60K 4104

Patent

active

043888453

ABSTRACT:
In a line pressure control device of an automatic transmission for vehicle a circuit is provided for generating a target line pressure signal corresponding an actually measured load signal obtained from an engine load sensor. A line pressure sensor generates an actually measured line pressure signal corresponding to the line pressure. A converter converts the target line pressure signal and the actually measured line pressure signal into upper limit line pressure signals and lower limit line pressure signals which are set given amounts above and below the target signal and the actually measured signal respectively. A decision circuit compares the upper and lower limit line pressure signals drives and properly driving and controls the hydraulic pressure adjusting valve in accordance with the result of the comparison.

REFERENCES:
patent: 2990041 (1961-06-01), Binder
patent: 3324738 (1967-06-01), Olsen et al.
patent: 3621735 (1971-11-01), Lemieux
patent: 3675511 (1972-07-01), Wakamatsu
patent: 3693479 (1972-09-01), Toyoda
patent: 3738197 (1973-06-01), Brumm et al.
patent: 4027554 (1977-06-01), Ito
patent: 4106367 (1978-08-01), Bouvet
patent: 4107776 (1978-08-01), Beale
patent: 4131035 (1978-12-01), Mizuno
patent: 4172505 (1979-10-01), Rabus
patent: 4231092 (1980-10-01), Grob
patent: 4259882 (1981-04-01), Miller

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