Fev Gmbh

Fev Europe Gmbh

Feb Gmbh

Uwe Schaffrath

Paul Grzeschik

Michael Paul

Knut Habermann

Christoph Muller

Andre Prinz

Simon Gottorf

Karsten Wittek

Reciprocating-piston machine (), in particular a combustion machine, with a variable compression ratio, having

Variable compression ratio reciprocating piston engine

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

The invention relates to an internal combustion engine () having a settable variable compression ratio and having a connecting rod (), which connecting rod has an adjustment mechanism () for the adjustment of the settable variable compression ratio, a first hydraulic line (), a second hydraulic line (), a hydraulic outflow duct () and a switching module () for the switching of the adjustment mechanism (), wherein the switching module () is arranged on the connecting rod () and a first position of the switching module () corresponds to a first compression ratio and a second position of the switching module () corresponds to a second compression ratio that differs from the first compression ratio, wherein the switching module () has a switching element () and a sleeve () surrounding the switching element (), wherein the switching element () and the sleeve () are movable relative to one another, and the switching element () has a recess () and an edge region () bordering the recess (), wherein, in the first position of the switching module (), the recess () and the sleeve () connect the first hydraulic line () in fluid-conducting fashion to the hydraulic outflow duct (), and the edge region () and the sleeve () shut off a fluidic connection between the second hydraulic line () and the hydraulic outflow duct (), and in the second position of the switching module (), the recess () and the sleeve () connect the second hydraulic line () in fluid-conducting fashion to the hydraulic outflow duct (), and the edge region () and the sleeve () shut off a fluidic connection between the first hydraulic line () and the hydraulic outflow duct ().

Internal combustion engine with settable variable compression ratio and with a switching module

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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Herzogenrath, Germany

Uwe Schaffrath