| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for a continuously variable transmission capable of constituting a vehicle system with high safety and fuel efficiency by the optimum control of a transmission gear ratio of a CVT (Continuously Variable Transmission) when an engine stops while the vehicle is in travel. SOLUTION: When the engine stops and is switched to a neutral state, while changing the transmission gear ratio of a CVT 4 to a target transmission gear ratio which is changed according to vehicle speeds, after a CVT-ECU 14 disengages a lock-up clutch of a torque converter 2 and a forward/backward clutch 3, a control parameter of a feedback control circuit is changed to reset an integral term. At the same time, the CVT-ECU 14 calculates inertia torque based on the change amount of target rotation speeds of a primary pulley 18, and then hydraulic pressure PD is changed using the calculated inertia torque. Thereby, clamp pressure required by a belt 20 is secured. COPYRIGHT: (C)2008,JPO&INPIT |
