Patent ID: 6755766
Filing Date: 2004-06-29
Classification: F16D,F16H,Y10T

Abstract:
A vehicle power transmission device in which a fluid coupling and a wet friction clutch are provided in series at points on a power transmission path which extends from an engine to a transmission, and which performs engagement/disengagement control of the clutch by varying the pressure of operating fluid used for engagement/disengagement driving the clutch in accordance with duty pulse signals outputted from an electronic control unit,wherein, when a vehicle starts up from a standstill, clutch engagement control is begun at the same time as the transmission is put into gear during a braking operation and a state of clutch disengagement, a duty pulse signal corresponding to full clutch engagement being outputted from the electronic control unit when the rotation difference on the input and output sides of the fluid coupling reaches or exceeds a predetermined value during this engagement control.