HYDRAULIC CONTINUOUSLY VARIABLE TRANSMISSION AND POWER TRANSMISSION DEVICE

摘要

In a hydraulic continuously variable transmission, an oil path connecting a valve hole, a first and a second plunger hole is formed in a cylinder block. The oil path has a confluent portion for converging the valve hole with the first and the second plunger hole. A distributing valve which stops flow-in of hydraulic fluid into the plunger hole or flow-out of the hydraulic fluid from the plunger hole has a land portion located at both sides of the confluent portion and a shaft portion opposed to the confluent portion. The land portion has a cross section area set almost identical to the cross section area of the valve hole and the shaft portion has a cross section area set smaller than the cross section area of the valve hole.