发明名称 Transmission device and control method for continuously variable transmission
摘要 In the case where a belt return of a continuously variable transmission is not determined when the vehicle speed has become equal to or lower than a threshold value, control that causes a hydraulic actuator to have an intermediate pressure by setting a duty of a duty solenoid based on an input torque and an oil temperature and closing control are repeatedly performed, in accordance with the running and the stopping of the vehicle. As a result, it is possible to inhibit the continuously variable transmission from being shifted up due to a gradual increase in the hydraulic pressure in the hydraulic actuator caused by a line pressure seeping to the hydraulic actuator side through a small clearance in a spool of a flow rate control valve in a hydraulic circuit, and it is also possible to allow the continuously variable transmission to be shifted down.
申请公布号 US7935023(B2) 申请公布日期 2011.05.03
申请号 US20080138832 申请日期 2008.06.13
申请人 AISIN AW CO., LTD. 发明人 KURITA KIYOSHI;HAZU FUMIHIRO
分类号 F16H61/662 主分类号 F16H61/662
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