In order to achieve the needs of continuous improvement of fuel efficiency of the engine, the development of the passenger diesel engine is progressing in the direction of increasing the combustion pressure for the lightening of the engine and the com...
In order to achieve the needs of continuous improvement of fuel efficiency of the engine, the development of the passenger diesel engine is progressing in the direction of increasing the combustion pressure for the lightening of the engine and the combustion efficiency. Especially, The cylinder block constituting the combustion chamber is a core part having the largest weight in the engine. Therefore, Aluminum block with cast iron cylinder liners is developing to reduce the weight of integrated cast iron structural blocks. However, cylinder liners currently used in gasoline engine aluminum block have gray cast iron with a tensile strength of 250MPa, which limits the durability of passenger diesel engines with combustion pressures up to 70% higher than gasoline engines. In this study, high strength cast iron added Mo, Cu, Ni has been developed, and its tensile strength has been increased by 16% and the bonding strength with Al cylinder block by 19% compared with the conventional cylinder liner. Also hardening mechanism and durability, workability of developed high strength cylinder liner were investigated.