A vehicle includes an engine with an associated engine-speed sensor, and wheels each having a respective wheel-speed sensor. The vehicle also includes a continuously variable transmission (CVT) coupled to the engine and configured to operate at variable input-to-output ratios. At least one controller is programmed to reduce the operating ratio of the CVT in response to the engine-speed sensor indicating the engine is operating at idle speed and the wheel-speed sensor indicating the velocity is approximately zero. This provides less noise, vibration and harshness in the vehicle due to the reduced ratio that is possible during conditions in which a vehicle launch in that reduced ratio may not be acceptable.
Continuously variable transmission (CVT) ratio control
2018-07-31
Patent
Elektronische Ressource
Englisch
Ratio changing the continuously variable transmission
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|Ratio Changing the Continuously Variable Transmission
British Library Conference Proceedings | 2004
|Ratio Changing the Continuously Variable Transmission
British Library Conference Proceedings | 2004
|Ratio changing the continuously variable transmission
Kraftfahrwesen | 2004
|Ratio Changing the Continuously Variable Transmission
SAE Technical Papers | 2004
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