Druckmittelabhängige Lagepositionierung des Stellkolbens einer Nockenwellenverstellung

摘要

The invention relates to a device fitted in internal combustion engines for the stepless adjustment of the rotary position of a crankshaft in relation to a camshaft, having a drive wheel to which a housing (12) is integrally fitted in which an adjusting piston (11) is hermetically guided and axially defines two pressure chambers (13, 14) which can be alternately connected to a pressure medium inlet and a pressure medium outlet and the adjusting piston (11) engages positively with the drive wheel (2) via a first set of teeth (4, 5) and to the toothed bush (9) via a second set of teeth (7, 8). According to the invention, in the housing (12) there is a locking piston (17) secured against rotation on the housing (12) and arranged between the adjusting piston (11) and the housing (12) which limits a further pressure chamber (27), where the locking piston (17) secured against rotation on the housing (12), arranged in the basic position between the adjusting piston (11) and the housing (12) and in positive engagement with the toothed bush (9), is axially movable depending on the pressure medium.