Patent ID: 8510001
Filing Date: 2013-08-13
Classification: F16H

Abstract:
1. In a motor vehicle, a method for failsafe disengaging of a gear and reaching a neutral position located between a first end position and a second end position of a gearshift fork in a shift transmission from a starting position of the gearshift fork where a first gear is engaged, said transmission being adapted to move the gearshift fork between the first end position where a first gear is engaged and a second end position where a second gear is engaged in a first direction and in a second direction; and synchronize a rotational speed of an input shaft of the shift transmission with a rotational speed of an output shaft of the shift transmission at a respective first synchronization point that is related to the first gear and a second synchronization point that is related to the second gear; said method comprising the steps of: applying a latching force to the gearshift fork that pushes the gearshift fork in a direction of the neutral position when located in a first position, and away from the neutral position when the gearshift fork is located in a second position that is more remote from the neutral position than the first position, wherein the latching force preferably reaches a maximum in the neutral position; determining a first time period Δt applying in a step S terminating in a step S