Compacted Graphite Iron – A New Material for Highly Stressed Cylinder Blocks and Cylinder Heads

Authors

Dr. S. Dawson, SinterCast Ltd., London; Prof. Dr. F. Indra, Honorary Professor, Vienna University of Technology

Year

2007

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 639

Summary

The demands for downsizing and power-up continue to pose challenges for engine designers and for the materials they choose. The present state-of-the-art for highly charged diesel engine performance is 60-65 kW/litre and 150 Nm/litre. This is forecast to rise to 80 kW/litre and 200 Nm/litre in the next generation of DI diesel engines and will surely reach 100 kW/litre during the next decade. These performance demands will result in significant increases in thermal and mechanical loading and will require new material solutions. The application of Compacted Graphite Iron (CGI) provides approximately double the fatigue limit of conventional grey iron and aluminium alloys and therefore satisfies bottomend durability requirements without increasing the size or weight of the main bearing region.

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