Patent ID: 7931001

Claim:
A valve train of an internal combustion engine comprising a substantially cylindrical valve tappet, which is adjustable for the variable transmission of a cam lift to a valve push rod inclined in relation to a longitudinal axis of the valve tappet in that the valve tappet has an outer part, secured against torsion about the longitudinal axis and with a cam follower face, an inner part, displaceably supported in a longitudinal bore in the outer part and acting on the valve push rod, and a lost motion spring, which is held inside the longitudinal bore between the outer part and the inner part and which forces the inner part towards an axial position relative to the outer part, in which the inner part and the outer part have seats aligning with one another, one or more coupling elements, displaceable in a direction of the other seat, being arranged in one of the seats for coupling the inner part to the outer part in the relative position, and at least one retainer ring, which is fixed in an annular groove of the longitudinal bore and interacts with an axial stop face of the inner part, being provided for fixing the relative position, said retainer ring on an inner circumference thereof having lugs with fitting holes extending radially inwards and separated by a fitting gap, wherein a free movement of the valve push rod relative to the lugs is assured by the provision of a torsional locking arrangement that fixes a radial position of the fitting gap inside the annular groove, with a position of the fitting gap is fixed basically perpendicular to a plane defined by the longitudinal axis of the valve tappet and a longitudinal axis of the valve push rod.