Control device for continuously variable transmission
First Claim
1. A control device for a continuously variable transmission which includes a belt wound around a primary pulley and a secondary pulley, and which is shifted by controlling a belt clamping force of the primary pulley and of the secondary pulley, the control device comprising:
- an oil pump and a pressure regulator valve configured to generate a line pressure;
a pilot valve configured to supply a pilot pressure regulated so as not to exceed a first predetermined pressure when the line pressure exceeds the first predetermined pressure; and
a control unit to control the continuously variable transmission, the control unit being configured togenerate the clamping force by controlling the pilot pressure; and
increase the line pressure to be greater than the first predetermined pressure when a control to increase the line pressure is performed when the line pressure is lower than the first predetermined pressure.
1 Assignment
0 Petitions
Accused Products
Abstract
A control device for a continuously variable transmission includes: a line pressure generating-section configured to generate a line pressure; a pilot valve configured to supply a pilot pressure regulated so as not to exceed a first predetermined pressure when the line pressure exceeds the first predetermined pressure; a control section configured to generate the clamping forces by controlling the pilot pressure; a line pressure increase section configured to increase the line pressure to be greater than the first predetermined pressure when the control to increase the line pressure is performed when the line pressure is lower than the first predetermined pressure.
15 Citations
10 Claims
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1. A control device for a continuously variable transmission which includes a belt wound around a primary pulley and a secondary pulley, and which is shifted by controlling a belt clamping force of the primary pulley and of the secondary pulley, the control device comprising:
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an oil pump and a pressure regulator valve configured to generate a line pressure; a pilot valve configured to supply a pilot pressure regulated so as not to exceed a first predetermined pressure when the line pressure exceeds the first predetermined pressure; and a control unit to control the continuously variable transmission, the control unit being configured to generate the clamping force by controlling the pilot pressure; and increase the line pressure to be greater than the first predetermined pressure when a control to increase the line pressure is performed when the line pressure is lower than the first predetermined pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification