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Miba Sintermetall Aktiengesellschaft

Karl-Heinz Menzl

Raimund Ratzi

Described is a molded part made of light metal, in particular a crankcase for an internal combustion engine, comprising holes ( ) for receiving fastening screws ( ) with the help of which compressive strains can be exerted on the molded body in a light metal area. In order to create advantageous constructional conditions, it is proposed that at least one open-pored sintered body ( ) is cast in the light metal area exposed to compressive strains with infiltration of the light metal at least in the pores of a surface layer; and that the sintered body ( ) having a lower coefficient of thermal expansion than the light metal has a strength at least corresponding with the strength of the light area when combined with the infiltrated light metal.

Light metal molded part, especially a crankcase for an internal combustion engine

The description relates to a crankcase made of light metal for an internal combustion engine with a parting plane ( ) running through the crankshaft axis between a case upper part and a case bottom part, whose bearing walls ( ), which connect the case outer walls ( ), are provided with inserts ( ) made of an iron material, in which the bearing shells of the crankshaft bearing and the bearing bolts ( ) provided on both sides of the bearing shells are borne. To achieve favorable construction features it is suggested that the bearing walls ( ) forming a continuous light metal bridge between the case outer walls ( ) accommodate the inserts ( ) that are lower than the bearing walls ( ) in recesses ( ) starting from the parting plane ( ) and are provided, in the area of the bearing bolts ( ), with through holes ( ) for the bolt heads ( ).

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München, Germany

Karl-Heinz Menzl