Patent ID: 6382165
Filing Date: 2002-05-07
Classification: F05C,F16F,Y10T

Abstract:
An engine balancer apparatus installed under a cylinder block and having a crankshaft and balancer shaft that are made of materials different from that of said cylinder block, whereinsaid crankshaft has a driving gear meshing with a driven gear of said balancer shaft, said balancer shaft has a support portion made of a material having substantially the same coefficient of linear expansion as that of said balancer shaft and said crankshaft, said support portion extending from said cylinder block corresponding to an axis of said crankshaft, an upper end face of said support portion being set to coincide with a horizontal straight line extending through the axis of said crankshaft; and said balancer apparatus comprising a first portion surrounding the balancer shaft, a second portion comprising an arm extending from the first portion in a first direction, and a third portion comprising an arm extending from the second portion in a second direction, the second and third portions being substantially perpendicular to the axis of the crankshaft.