Valve train for internal combustion engine, has valve sleeve guided by axially movable piston, and central fastening screw accomplishing axial securing of camshaft adjuster when adjuster is centered to camshaft by direct attachment

摘要

The train (1) has a camshaft adjuster (2) fastened with a screw head (48) by a central fastening screw (12) i.e. central valve, with a valve sleeve (28). The sleeve is arranged in a central point of a rotor core (16) of the adjuster. The sleeve has a central P-channel (103) connected with a pressure connector (P), a tank connector (T) i.e. hydraulic return connection, and a pair of working connections (A, B). The sleeve is guided by an axially movable piston (20). The screw accomplishes an axial securing of the adjuster when the adjuster is centered to a camshaft (24) by direct attachment.