System and method of controlling line pressure for V-belt...

Details System and method of controlling line pressure for V-belt... System and method of controlling line pressure for V-belt...

2005-07-12

2005-07-12

Pang, Roger (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

C477S045000

Reexamination Certificate

active

06916269

ABSTRACT:
In a V-belt type CVT, an actual-shift-ratio corresponding operated position of a step motor is calculated through conversion of an actual shift ratio expressed by the rotational-speed ratio between primary and secondary pulleys. A displacement amount is calculated between the actual-shift-ratio corresponding operated position of the step motor and an actual position thereof. A correction amount of the line pressure is calculated to reduce the displacement amount, and the line pressure is corrected in accordance therewith.

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patent: 6846266 (2005-01-01), Iida et al.
patent: 8-178042 (1996-07-01), None

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