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OwnerKarlheinz Bing, Frank Winger +2inventors
InventorsKarlheinz Bing, Frank Winger, Ulrich Bischofberger, Stefan Spangenberg
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The invention relates to a cylinder crankcase (1) for an internal combustion engine, into which crankcase a one-piece cylinder jacket system (9) is diecast, the system comprising at least two cylinder jackets (5, 6, 7) that are arranged in a row and that are interconnected via webs (2, 3, 4). The aim of the invention is to provide a cylinder crankcase which can be produced at low cost and which comprises a cylinder jacket system that can be subjected to high thermal and mechanical stresses. According to the invention, a lateral face of the cylinder jacket system (9) has a rough structure and is surrounded by a diecast outer casing (26). Respective coolant passages (14, 15, 16) having openings (31, 32) for supplying and discharging the coolant are formed into the webs (2, 3, 4), at least one opening (32) extending through the outer casing (26) into the recess (25) for the water cooling jacket.
Cylinder crankcase (1) for an internal combustion engine, which consists of an aluminum/silicon alloy, and into which a sleeve system (9) consisting of one piece is cast, using the high-pressure die-casting method, which system consists of a super-eutectic aluminum/silicon alloy, and which has at least two cylinder sleeves (5, 6, 7) disposed in a row and connected with one another by way of webs (2, 3, 4), whereby the side surface of the sleeve system, composed in part of the radially outer mantle surfaces (10, 11, 12) of the cylinder sleeves (5, 6, 7) and in part by the adjacent surfaces of the webs (2, 3, 4) has a rough structure, wherein the side surface of the sleeve system (9) is surrounded by an outer casing (26) formed by the cylinder crankcase (1), which delimits a recess (25) for a water jacket formed into the cylinder crankcase (1) on the cylinder sleeve side, and wherein at least one coolant passage (14, 15, 16, 33), in each instance, is introduced into the webs (2, 3, 4), having openings (31, 32, 34, 35) for entry and exit of the coolant, whereby at least one opening (32, 34, 35) opens into the recess (25) for the water jacket, by way of the outer casing (26).
Dependencies are inferred from the claim text.