Patent ID: 7131419
Filing Date: 2006-11-07
Classification: F02F,F05C,F16C,F16M

Abstract:
1. A crankshaft supporter comprising: a support member which is attached to a cylinder block of an engine to support a crankshaft and which is formed of a matrix of aluminum alloy with a preform cast inside, said support member having a mounting surface in contact with an attachment surface on said cylinder block; a first bolt hole corresponded to a second bolt hole in said cylinder block and opened to said mounting surface; a dowel hole in coaxial alignment with said first bolt hole and opened to said mounting surface; a support member-side bearing metal on the support member for supporting the crankshaft in cooperation with a cylinder block-side bearing metal on the cylinder block; a dowel pin inserted in said dowel hole for positioning the attachment surface on said cylinder block and the mounting surface on the support member side so as to join the cylinder block-side bearing metal with the support member-side bearing metal when mounting the support member to the cylinder block; and said support member having a recess section which is formed of said matrix and which is positioned between said mounting surface and an opposing surface of a penetrated section of said preform that faces said mounting surface, said dowel hole being formed entirely within said recess section; and wherein the dowel pin has a tip which is inserted into the recess section and is positioned above the opposing surface of the penetrated section of said preform.