Patent ID: 7383805

Claim:
A cylinder liner for insert casting, having a plurality of projections each having a constriction on an outer circumferential surface, wherein the cylinder liner satisfies the following requirements (i) to (iv): (i) the height of projections is in a range between 0.5 mm and 1.0 mm, inclusive; (ii) the number of the projections is in a range between 5 and 60, inclusive, per cm 2 on the outer circumferential surface; (iii) a ratio S 1 of area of a region that is encircled by a contour line of a height of 0.4 nim is no less than 10% in a contour diagram of the projections, the diagram being obtained through measurement of the outer circumferential surface along the height direction of the projections with a three-dimensional laser measuring device; and (iv) a ratio S 2 of area of a region that is encircled by a contour line of a height of 0.2 mm is no more than 55% in a contour diagram of the projections, the diagram being obtained through measurement of the outer circumferential surface along the height direction of the projections with a three-dimensional laser measuring device.