Method for operating a hydrodynamic coupling device of the open 3-conduit type

摘要

The method involves displacing a clutch piston (50) by a fluid pressure that is provided in the space areas (52,54) for engaging the lockup clutch (48). The clutch piston is displaced in the disengaging direction by a secondary fluid pressure provided in the secondary space area for disengaging the lockup clutch. The fluid supply pressure is adjusted for the space areas based on an operating variable in the engaged and disengaged states of the lockup clutch.