Crankshaft of a ferro-metallic material for reciprocating piston internal combustion engines
AssigneeDr. Ing. h.c.F. Porsche Aktiengesellschaft
InventorsPeter Krotky, Herbert Ampferer
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Abstract
A crankshaft of a ferro-metallic material for reciprocating engines, particularly for internal combustion engines, includes bearing pins and crank pins whereby the crank pins are delimited by webs extending transversely to a longitudinal center axis of the crankshaft which are constructed as counterweights. For optimizing the crankshaft as regards weight and structural length combined with good mass balancing, the crank pins are provided with hollow bores in the direction of their center axis and the counterweights with heavy-metal bodies.
Claims13
A crankshaft of ferro-metallic material for reciprocating piston engines, particularly for six cylinder internal combustion engines having two rows of cylinders extending in a V-shape, comprising bearing pin means extending in a crankshaft longitudinal center axis, crank pin means offset with respect to said bearing pin means, web means extending substantially transversely to the crankshaft longitudinal axis for delimiting said crank pin means, said web means being constructed as counterweights, said crank pin means being provided with hollow relief bores extending substantially in the direction of their center axes, said counterweights including counterweight bores having heavy-metal bodies fixed therein, and at least a portion of said counterweight bores and said hollow relief bores of said crank pin means having common machining directions.
Dependencies are inferred from the claim text.