Search Results

The tendency to use aluminum alloys to replace conventional gray cast irons (GCI) materials in engine blocks of passenger cars is gaining more and more importance driven by reduction of engine weight to achieve expectation for lowering fuel consumption and CO₂ emissions. Cast-in cylinder liners are commonly applied inside of aluminum engine blocks with designs of the outer surface usually selected through analysis of the aluminum casting process (e.g., high pressure die casting, precision sand cast), geometry complexity, thermal and mechanical loads. A good quality of clamping (bonding and shear strength) between the cast-in cylinder liner and aluminum block might guarantee a reliable heat transfer and thus low bore distortion. The good clamping can also contribute to improve the final machining of the liner after block casting. The most effective variants of cast-in cylinder liner designs were selected for the evaluation of clamping performance.