Optimum Compression Ratio Variation of a 4-Stroke, Direct Injection, Diesel Engine for Optimum Performance Research Authors Abou Al-Sood, M. M., Ahmed , M., Abdel-Rahim, Y.M. Research Journal ASME- IMECE 2011-62156, November 11- 17, Denver, CO, USA. Research Member Yousef Mohamed Abdel-Rahim Research Rank 3 Research Year 2011