Federal-mogul Valvetrain Gmbh

Dirk Schober

Thorsten Matthias

Stefan Kellermann

Guido Bayard

Florian Ringeling

Frank Zwein

A valve rotating device with valve stem seal includes a valve rotating device, with a cylinder head rest and a spring rest intended to bear against a valve spring during operation. The valve rotating device is designed to rotate the spring rest relative to the cylinder head rest during operation. A valve stem seal is attached to the cylinder head rest of the valve rotating device. The valve stem seal being designed to bear against a valve stem and to seal same during rotational and axial movements.

Valve stem seal comprising a valve rotating device

A method for shaping a hollow valve preform of a pull rod () includes a structuring bulb () which is inserted into the cavity () of a shaft portion () of a valve preform. The structuring bulb () has an outer diameter, and has an outer structuring, whereafter the hollow shaft portion () is shaped, wherein at least a portion of an inner diameter of the cavity () is reduced below an outer diameter of the structuring bulb (). The structuring bulb () is then pulled out through the shaped shaft portion (), wherein the outer structuring is at least partially pressed into the surface of the cavity ().

Method and device for manufacturing hollow, internally cooled valves

An internally cooled inlet or outlet valve for internal combustion engines, has a valve disc, a valve stem and a cavity inside the valve stem and the valve disc. A coolant is arranged in the cavity, wherein the cavity is provided with at least one guide vane for the coolant.

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Uetze, Germany

Dirk Schober