400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 SAE TECHNICAL PAPER SERIES 980889 First and Second Law Analyses of a Naturally-Aspirated, Miller Cycle, SI Engine with Late Intake Valve Closure Michael K. Anderson General Motors Corporation Dennis N. Assanis and Zoran S. Filipi The University of Michigan International Congress and Exposition Detroit, Michigan February 23-26, 1998