CYLINDER BLOCK

摘要

PROBLEM TO BE SOLVED: To provide a cylinder block which includes a cylinder liner formed of a fiber-reinforced metal composite material and which is excellent in abrasion resistance. SOLUTION: In the cylinder block in which a porous structure is adopted as a preform of a cylinder liner and a metal matrix is impregnated in the preform, the porous structure comprises inorganic particles of 1-50μm mean grain size, smaller diameter inorganic fibers of 2-5μm mean fiber diameter and 10-200μm mean fiber length which mainly capture and disperse the inorganic particles in forming a formed body and larger diameter inorganic fibers of 4-20μm mean fiber diameter and 10-200μm mean fiber length which form cavities in combination with the smaller diameter inorganic fibers in forming the formed body.