Automotive engine cylinder block having good bonding strength and performance characteristics

摘要

Provided is casting cylinder blocks for a vehicle engine with excellent adhesion and operating characteristics. The present invention relates to cylinder blocks of a vehicle engine including an Fe sleeve, having an inner circumferential surface in contact with a piston ring and an outer circumferential surface in casting connection with an aluminum cylinder block. Moreover, the Fe sleeve has an inner circumferential surface coming in contact with the piston ring and having a DCI structure, an inner portion having a CV or the DCI structure, and an outer circumferential surface coming in contact with the aluminum cylinder block and having a GCI structure.