Fluid pressure supply arrangement for fluid operated countershaft power transmission

摘要

A fluid pressure supply arrangement for the hydraulic control system of an automated countershaft power transmission for an automotive vehicle, wherein a fluid pressure is generated by vacuum supplied through a vacuum cut-off valve and is directed to the hydraulic control system through a pressure cut-off valve, each of the vacuum and pressure cut-off valves being closed when the engine is at rest and simultaneously the gearshift control lever for the power transmission is held free from a manipulative force.