Interrelated power delivery controls – including engine control – Transmission control – Continuously variable friction transmission
Patent
1997-01-28
1999-01-12
Wright, Dirk
Interrelated power delivery controls, including engine control
Transmission control
Continuously variable friction transmission
477 43, 477 48, F16H 900
Patent
active
058579370
ABSTRACT:
A speed change ratio of a continuously variable transmission for converting the rotation of the output shaft of an engine in a stepless manner and transmitting it to a drive shaft of a vehicle is controlled to a target speed change ratio. A target vehicle speed at a predetermined future time is estimated based on a real vehicle speed, and the target speed change ratio is calculated based on the estimated vehicle speed. By controlling a real speed change ratio to this target speed change ratio, the response of the transmission is enhanced. Preferably, a feedback vehicle speed is calculated by processing the estimated vehicle speed with a predetermined lag element. By integrating a difference between the real vehicle speed and feedback speed so as to estimate the vehicle speed at the predetermined future time, hunting of the speed change ratio in the speed change ratio control is suppressed.
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Adachi Kazutaka
Ashizawa Hiroyuki
Ito Ken
Kwon Peter T.
Nissan Motor Co,. Ltd.
Wright Dirk
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