Hydraulic coupling element, used in internal combustion engine, comprises a piston having one surface larger than a further surface

摘要

Hydraulic coupling element coupling a first shaft (17) to a second shaft (21) comprises a first (52) and a second chamber (54) in which a piston (53) is movably positioned, a channel (533) connecting the first chamber to the second chamber, and a valve (60) feeding oil into one of the chambers. The piston is coupled to the first or second shaft and a housing (51) forming the walls of the first and/or the second chamber is coupled to the second or first shaft. The piston has a first surface (531) facing the first chamber and a second surface (532) facing the second chamber. The second surface is larger than the first surface. The second surface is 15-40% larger than the first surface.