BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION AND VEHICLE INCLUDING THE SAME
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United States of America Patent
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Issued Date -
Dec 5, 2013
app pub date -
Dec 14, 2011
filing date -
Feb 24, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A hydraulic circuit includes a first control valve that controls a hydraulic pressure of a first oil chamber of a CVT; a lubrication circuit whose hydraulic pressure changes in accordance with an engine rotational speed so that the higher the engine rotational speed, the higher the hydraulic pressure; and a fail-safe valve including an electromagnetic four-way valve. During normal operation, the fail-safe valve is set to a first state in which the first control valve and the first oil chamber communicate with each other. At a time of failure, the fail-safe valve is switched to a second state in which at least the first oil chamber and the lubrication circuit communicate with each other.
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