Piston reciprocating movements and a movement of revolution, the control of internal combustion engine

摘要

The piston (2), rotatable on a connecting rod (1) about its longitudinal axis (19), has a control element (10) capable of swivelling to and fro as a function of the swivel movement of the connecting rod (1). The control element (10) has two friction surfaces (11, 12), inclined towards the longitudinal axis (19) and enclosing an obtuse angle with one another. The one friction surface (12) interacts with a correspondingly formed friction surface in the piston (2) and the other friction surface (11) with a correspondingly formed friction surface on a contact pressure part (15). The contact pressure part (15) is arranged axially moveable in the piston (2) and its axial play (2s) is greater than the axial play (s) of the control element (10). A frictional connection of the control element (10) to the piston (2) comes about under the effect of the inertial forces of the contact pressure part (15) and of the control element (10). Because of the double cone shape of the two friction surfaces (11, 12) of the control element (10), large moments of friction are generated on the one hand, whilst on the other, owing to the different design plays of the control element (10) and the contact pressure part (15), a good separation of the interacting surfaces is always achieved at the end of the positive rotary movement of the piston (2), so that no return rotary movement of the piston can occur. IMAGE