CONTROL DEVICE FOR STEPLESS TRANSMISSION FOR VEHICLE

摘要

An electronic control device for a stepless transmission for a vehicle. When a target transmission ratio is being set to a maximum transmission ratio and the vehicle speed lowers below a first reference vehicle speed, the electronic control device stops a change in the transmission ratio performed by shift control, releases an operating oil from a first hydraulic pressure chamber, and starts a transmission ratio holding control which holds the transmission ratio at the maximum transmission ratio. When the vehicle speed is increased to a level higher than or equal to a second reference vehicle speed which is lower than the first reference vehicle speed, the electronic control device finishes the transmission ratio holding control and fills the operating oil into the first hydraulic chamber, and when after that the vehicle speed is increased to a level higher than or equal to the first reference vehicle speed, the electronic control device restarts a change in the transmission ratio performed by shift control.