Patent ID: 8437931
Filing Date: 2013-05-07
Classification: B60Y,F16D,F16H,Y10T

Abstract:
1. Method for performing gear shifting by engaging a coupling element with a gear wheel, wherein the gear wheel is adapted to be locked to an input shaft with the aid of the coupling element in order to transmit power from the input shaft to an output shaft, comprising moving the coupling element relative to the gear wheel from a disengaged position to an engaged position, in which a particular gear is selected, controlling a rotational speed of the coupling element relative to a rotational speed of the gear wheel by a synchronizing arrangement, the synchronizing arrangement comprising a first synchronizing gear wheel which is rotationally locked to the input shaft, and a second synchronizing gear wheel which is in mesh with the first synchronizing gear wheel, and a synchronizer unit operatively arranged between the output shaft and the second synchronizing gear wheel, wherein the synchronizer gear wheels are designed so that a desired, predetermined speed difference between the input shaft and the gear wheel is achieved when the synchronizer unit is in an engaged state, and controlling a rotational speed of the coupling element during movement of the coupling element so that the speed difference is maintained until the coupling element reaches the engaged position.