Slip protection method for a belt-type variator of a CVT
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United States of America Patent
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Jan 27, 2004
Grant Date -
Mar 6, 2003
app pub date -
Mar 15, 2000
filing date -
Mar 23, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for protecting a variator in a continuously variable belt-type transmission of a motor vehicle, simultaneously with a calculation based on an engine signal containing the magnitude of the engine torque and subsequent conversion of a contact-pressure theoretical value, providing the added safety on the variator, that the contact pressure on the variator is measured by a pressure sensor and the maximum transmissible transmission input torque is calculated with reference to this value. The maximum transmissible transmission input torque is then compared with the engine torque to the transmission and in case the maximum transmissible transmission input torque is less than the engine torque, an engine interruption is effected.
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