Speed change control system for synchromesh type transmission

摘要

A speed change control system for a synchromesh type transmission includes a synchromesh mechanism having a sleeve ring adapted to be moved in the axial direction of an output shaft to mesh with an idle gear to fix the idle gear on the output shaft, and a shift actuator adapted for acting on a shift fork connected to the sleeve ring, to effect engagement/disengagement between the sleeve ring and the idle gear. A pressure control device is provided for making variable the pressure to be applied to the shift fork by the shift actuator. The pressure control device sets the pressure so high from the speed change start to the balk point that the shift fork is able move as fast as possible and so low from the balk point onward that shift shock is reduced.