| 摘要 |
PROBLEM TO BE SOLVED: To improve responsiveness and drivability of a vehicle equipped with a continuously variable transmission when an accelerator is pressed down or returned. SOLUTION: A target speed-change ratioαon the low side and a target speed-change ratioβon the high side are calculated by using a map Ma for UP and a map Mb for DOWN from vehicle speed and accelerator openings. When the target speed-change ratioαis "high" compared to the previous speed-change ratio of the continuously variable transmission, the target speed-change ratioαis made the speed-change ratio of the continuously variable transmission. When the target speed-change ratioβis "low" compared to the previous speed-change ratio of the continuously variable transmission, the target speed-change ratioβis made the speed-change ratio of the continuously variable transmission. As for the area where the target speed-change ratioαis not "high" compared to an actual speed-change ratio, and the target speed-change ratioβis not "low" compared to an actual speed-change ratio, the speed-change ratio of the continuously variable transmission is put on hold. Thus, the responsiveness of accelerator operation at the time of pressing down on an accelerator and returning it is improved. COPYRIGHT: (C)2009,JPO&INPIT
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