Speed change control apparatus for continuously variable transmission
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Oct 5, 2004
Grant Date -
Nov 29, 2001
app pub date -
May 2, 2001
filing date -
May 12, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A continuously variable transmission having a primary pulley and a secondary pulley on which a belt wound on the primary pulley is fitted. The width of the groove on the primary pulley is adjusted by the oil pressure in the primary hydraulic chamber in the primary cylinder, the width of the groove on the secondary pulley is adjusted by the oil pressure in the secondary hydraulic chamber in the secondary cylinder. The switching operation between the speed change operation in a state in which the line pressure is supplied to the secondary hydraulic chamber and the primary pressure is supplied to the primary hydraulic chamber by the oil passage switching valve, and the speed change control in a state in which the line pressure is supplied to the primary hydraulic chamber and the primary pressure is supplied to the secondary hydraulic chamber can be performed.
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