Fev Gmbh

Feb Gmbh

Paul Grzeschik

Uwe Schaffrath

Michael Paul

Karsten Wittek

Christoph Muller

The invention relates to an internal combustion engine having an adjustable variable compression ratio, a crankshaft having a crankshaft center line and at least one counterweight, which has an extent with a maximum distance from the crankshaft center line, at least one connecting rod, an adjusting mechanism for adjusting the adjustable variable compression ratio, a switchover element for switching the adjusting mechanism, wherein the switchover element is arranged on the connecting rod, and an actuating element for switching over the switchover element from a first position, which corresponds to a first compression ratio, into a second position.

Positioning the switching element for a mechanically switched VCR connecting rod

A switching valve for an internal combustion engine, which has an adjustable compression ratio, namely to control a hydraulic oil flow particularly for an eccentric adjustment mechanism, having a control piston, which can be shifted by a switching mechanism similar to a ballpoint pen mechanism, wherein the control piston controls the hydraulic oil flow dependent on the switch position thereof, wherein the switching mechanism comprises at least one actuation element and a detent element, and wherein at least the control piston, the actuation element and the detent element are nested in each other so that they are implemented in a concentrically overlapping manner, at least in sections, when viewed in the shifting direction of the control piston.

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Aachen, Germany

Paul Grzeschik