Line pressure control apparatus for continuously variable...

Details Line pressure control apparatus for continuously variable... Line pressure control apparatus for continuously variable...

2006-06-27

2006-06-27

Charles, Marcus (Department: 3682)

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Load responsive

C474S028000

Reexamination Certificate

active

07066855

ABSTRACT:
There is provided a line pressure control apparatus that is comprised of a line pressure control section that controls line pressure according to its target value calculated based on input torque information, target gear ratio, and so forth; and a line pressure setting section that sets the upper limit of the line pressure according to an inputted range signal when the engine speed is equal to or higher than a predetermined speed. The line pressure control section suppresses an increase in line pressure by controlling the line pressure such that it does not exceed the set upper limit in the case where the upper limit of the line pressure has been set. Therefore, it is possible to prevent the occurrence of cavitation noise in an oil pump, which generates basic pressure for line pressure, during high-speed engine revolution.

REFERENCES:
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patent: 5941786 (1999-08-01), Van Wijk et al.
patent: 6120413 (2000-09-01), Kawamura
patent: 6168547 (2001-01-01), Kawamura
patent: 6217469 (2001-04-01), Sawada et al.
patent: (62-83548 (1987-04-01), None
patent: (11-166620 (1999-06-01), None

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