Speed of travel-related switching device for preventing inadmissible changing down in a motor vehicle transmission

摘要: Speed of travel-related switching device in a motor vehicle transmission which contains safeguard to prevent or at least essentially impede over-revving the engine when changing down too high speed. A plunger (3), is pressed by spring force into control shaft (1) producing gears, also acted upon piston (5) pressure cylinder (6) pressure, varying as function speed rotation output (12), exceeds predetermined value and thereby opens directional valve (7), result medium flows with greater against (3).