| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a control deice of a continuously variable transmission for a vehicle capable of quickly resuming changing of the gear ratio, when a rotating speed sensor can accurately detect a rotating speed when a vehicle speed increases, while holding the gear ratio to the maximum gear ratio by bleeding a hydraulic fluid of a primary pulley when existing in an extremely low vehicle speed area. <P>SOLUTION: An electronic control device 300 executes gear ratio holding control for holding the gear ratio to the maximum gear ratio by bleeding the hydraulic fluid of a hydraulic chamber 131, by stopping the changing of the gear ratio by shift control for performing feedback control so that the actual gear ratio calculated based on the rotating speed of the primary pulley 130 and a secondary pulley 150, coincides with the target gear ratio, when the target gear ratio is set to the maximum gear ratio and a vehicle speed is reduced up to being less than a first reference vehicle speed, and resumes the changing of the gear ratio when the vehicle speed increases up to the first reference vehicle speed or more, after filling the hydraulic fluid in the hydraulic chamber 131 when the vehicle speed increases up to a second reference vehicle speed or more. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
