Patent ID: 6694834
Filing Date: 2004-02-24
Classification: B60K,F16H,Y10T

Abstract:
A method for performing a synchronized gear shift of a gear system comprised of a first rotary input member, a second rotary input member, a rotary output member movable between a first position where it is coupled to the first rotary input member and a second position where it is coupled to the second rotary input member, and a synchronizing mechanism for synchronizing the rotational speed of the rotary output member with the rotational speed of the second rotary input member while the rotary output member moves from its first position toward its second position at a variable shift velocity, which steps comprise:accelerating the rotary output member to a first shift velocity that is greater than a synchronization shift velocity, wherein the synchronization shift velocity corresponds to the shift velocity of the rotary output member during the period of time in which rotational speed synchronization between the second rotary input member and the rotary output member occurs; decelerating the rotary output member to a second shift velocity that is less than the synchronization shift velocity; and accelerating the rotary output member to a third shift velocity that is substantially equal to the synchronization shift velocity.