This applied thermoscience book covers the basic principles and applications of various types of internal combustion engines. Explores the fundamentals of most types of internal combustion engines with a major emphasis on reciprocating engines. Covers both spark ignition and compression ignition engines as well as those operating on four-stroke cycles and on two-stroke cycles ranging in size from small model airplane engines to the larger stationary engines. Examines recent advancements, such as, Miller cycle analysis, lean burn engines, 2-stroke cycle automobile engines, variable valve timing, and thermal storage.