Optimum Compression Ratio variation of 4-Stroke, Direct-Injection Diesel Engine for Maximum Brake power and Torque and Minimum Soot an NOx Emissions Research Authors Abou Al-Sood, M. M., Abdel-Rahim, Y. M., Abdel-Moniem, A. M., and Abdel-Latif, A. A. Research Journal SAE (Society of Automotive Engineering) Research Member Maher Mustafa Hamed Aboul Seoud Research Rank 2 Research Year 1999