Mercedes-benz Aktiengesellschaft

Edgar Brutsch

Erhard Rau

Dieter Scherenberg

In a crank chamber venting arrangement for an internal combustion engine including a crankcase defining a crank chamber and having integrally formed in an end wall thereof an oil separating chamber disposed at the top end of the crank case, a crank chamber venting passage extending between the crank chamber and the separating chamber and a return passage extending between the separating chamber and the crank chamber and including a siphon, the crank chamber venting passage and the oil return passage including the siphon are open at the end wall of the crankcase and are closed by a cover and the separating chamber is open at the top and closed by a cylinder head mounted on the crankcase such that the passages and the separating chamber can be formed integrally during casting of the crankcase without the use of sacrificial cores.

Crank chamber venting arrangement for an internal combustion engine

In multi-valve engines, a partition wall dividing the intake channel into inlet-valve channels as an evaporation element in the intake channel of a cylinder head of an internal-combustion engine for improving the fuel-mixture formation and consequently for reducing the emission of hydrocarbons. The partition wall is electrically heated by a heating bar and is subjected to fuel substantially tangentially from a fuel injection located at the intake channel. As a result of this configuration, the flow behavior of the mixture is optimized in terms of the installation of evaporation elements in the intake channel, and an improved transmission of heat to the mixture and a homogeneous mixture formation are achieved. In addition, sealing problems between the intake channel and the surroundings are solved in a simple way.

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Stuttgart, Germany

Edgar Brutsch