HYDRAULIC CONTINUOUSLY VARIABLE SPEED TRANSMISSION

摘要

A hydraulic continuously variable speed transmission comprises means for detecting speed reduction ratio of said continuously variable speed transmission, means for detecting accelerator opening, and means for detecting vehicle speed. During running, when the means for detecting accelerator opening detects a fact that accelerator opening has been fully closed, the means for detecting speed reduction ratio detects the speed reduction ratio at the moment, and then an operation initiating vechicle speed of said clutch valve is determined based on the detected speed reduction ratio, and when the vehicle speed detected by the means for reduction vehicle speed is reduced to the operation initiating vehicle speed, clutch valve starts to open.