Centrifugal cvt oil pressure control device

摘要

A centrifugal oil pressure control arrangement for a continuously variable transmission includes an oil pressure chamber connected to a sheave member, a centrifugal oil pressure correction chamber connected to the opposite side of the oil pressure chamber with respect to the sheave member, and a cylinder connected to the sheave. A piston is disposed fixedly in the cylinder and defines the oil pressure chamber and the centrifugal oil pressure chamber by the piston. A first opening formed on the piston and the oil pressure chamber is communicated with the centrifugal oil pressure chamber by the first opening. The centrifugal oil pressure control arrangement includes the cylinder having a main cylinder and a sub-cylinder. The main cylinder is connected to the sheave and slidably moved on the main cylinder. The sub-cylinder is fixedly connected to the shaft and has a second opening communicated between the centrifugal oil pressure chamber and a casing. The second opening is radially located to become equal to or a slightly smaller than the inner radius of the sheave.