Patent ID: 8667932
Filing Date: 2014-03-11
Classification: F01P,F02F

Abstract:
1. A cooling structure for an internal combustion engine in which: a spacer is fitted inside a water jacket formed to surround a periphery of a plurality of cylinder bores of a cylinder block in the internal combustion engine, the spacer comprising a spacer main body part surrounding the cylinder bores, the spacer main body part being formed of a uniform height around all of the cylinder bores of the cylinder block in an axial direction of the cylinder bores; and a cooling condition of the cylinder bores is controlled by regulating a flow of cooling water in the water jacket by use of the spacer, wherein the spacer covers the cylinder bores entirely in a peripheral direction of the cylinder bores, and covers only an intermediate portion of the cylinder bores in a depth direction of the water jacket on both of an intake side and an exhaust side of the cylinder bores, and wherein the spacer is arranged closer to an inner wall surface of the water jacket than to an outer wall surface of the water jacket on both of the intake side and the exhaust side of the cylinder bores.