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Ab Volvo

Ovako Arvika Ab

Henk Ravenshorst

Gerhard Berr

Lars Olof Lundin

Magnus Horn

Armin Ihle

Jorgen Konig

In a multipart cooled piston ( ) for a combustion engine with a piston upper part ( ) of steel comprising a combustion bowl ( ) and a ring wall ( ) with ring belt ( ), and with a piston lower part ( ) comprising a piston skirt ( ), pin bosses ( ) for receiving the piston pin connecting the piston ( ) to the connecting rod, and pin boss supports ( ) connected to the piston skirt ( ), and in a method for manufacture of such a piston ( ), inexpensive manufacture and good form stability are to be achieved in that a cooling channel ( ) formed inside the piston upper part ( ) has forged supporting ribs ( ) in its area extending to the combustion bowl ( ), which each form sections of an all-round ring rib ( ) with a connection surface radially to the longitudinal piston axis (K), in that the piston lower part ( ) has an annular and all-round carrier rib ( ) with a connection surface connected to the pin boss supports ( ), and in that the piston upper part ( ) and the piston lower part ( ) are non-detachably connected by means of the connection surfaces of the ring rib ( ) and the carrier rib ( ).

Multipart cooled piston for a combustion engine and method for manufacture thereof

Method of manufacturing connecting rods

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Västra Frölunda, Sweden

Henk Ravenshorst