COOLING STRUCTURE FOR INTERNAL COMBUSTION ENGINE

摘要

A cooling structure for an internal combustion engine comprises: a cylinder liner (20) provided with first cooling bores (30) formed so as to extend obliquely upward from the outer peripheral surface toward the inside of the wall; and a cylinder cover (40) provided with second cooling bores (42) formed so as to extend obliquely upward from the outer peripheral surface toward the inside of the wall, the cylinder cover (40) being disposed on the upper part of the cylinder liner (20) and closing the opening located in the upper part of the cylinder liner (20). The cooling structure for an internal combustion engine also comprises a ring-shaped metallic reinforcing member (10) which is located at the joint between the cylinder liner (20) and the cylinder cover (40) so as to straddle both the cylinder liner (20) and the cylinder cover (40) and so as to be fitted over the outer peripheral surfaces of the cylinder liner (20) and the cylinder cover (40), the metallic reinforcing member (10) forming a cooling water path (11) between the metallic reinforcing member (10) and the outer peripheral surfaces of the cylinder liner (20) and the cylinder cover (40), the metallic reinforcing member (10) preventing the cylinder liner (20) from expanding outward in the radial direction during the operation of the internal combustion engine.