Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Kolbenschmidt Pierburg Innovations Gmbh

Frederic Lauer

Rudolf Flierl

Daniel Hosse

Prof-Dr Rudolf Flierl

A valve spring collar () for supporting spring forces of closing springs () that act on gas exchange valves () in an internal combustion engine has a plate-shaped main body (). A through opening () leads through the main body () for receiving and attaching a valve stem () of the gas exchange valve (). The valve spring collar () also has at least one cavity (). A method for producing the valve spring collar () includes at least one additive production method step.

Reduced-weight value spring collar

A mechanically controllable valve drive for a reciprocating piston engine configured to adjust a gas exchange valve includes the gas exchange valve, a cam assembly comprising a camshaft and at least one cam for the gas exchange valve, a valve, a valve lift adjustment assembly, a drag lift assembly, and a device. The valve lift adjustment assembly comprises a valve lift adjustment device, and an intermediate lever assembly comprising at least one intermediate lever comprising a working curve comprising curve portions. The valve lift adjustment assembly is configured to shift the valve between a zero lift and a maximum lift. The drag lever assembly is operatively connected to the working curve. The device is configured to provide a valve-lift standstill range so that, in a maximum lift position, the valve is opened for a turning angle &#x3c9; of the camshaft with a flattened valve lift height.

Growing community of inventors

Oberriexingen, Germany

Frederic Lauer