Controlling shift in synchronized vehicle gearbox, involves changing input shaft revolution rate towards synchronized rate by minimum amount in defined period with actuator in defined range

摘要

The method involves determining a synchronous point for a shift actuator (3) with a gearbox evaluation device (4) and using the stored synchronous point in a gearbox controller (5) to change between first and second control modes of the synchronization process. The gearbox input shaft (2) revolution rate is first changed towards a synchronized revolution rate by a defined minimum amount in a defined period, the shift actuator is in a defined positional range and its position within this range changes by no more than a maximum value in a defined period to fix the synchronous point. Independent claims are also included for the following: an arrangement for implementing the method.