Macroscopic thermodynamic views of internal combustion engines

This thesis presents a study of macroscopic thermodynamic concepts used to evaluate advanced design modifications to the internal combustion engine.; A set of analytical solutions is developed which is used to determine the thermal efficiencies of such designs based on modified ideal gas cycles (MIGC).; The first design considered (modified engine 1) is an engine equipped with an "expander-cycle" exhaust and induction system used to recirculate the hot exhaust gases from the combustion chamber in order to vaporize the incoming fuel charge for complete combustion.; The second design to be considered (modified engine 2) is a diesel low heat rejection engine (LHRE) which uses ceramics to lower the amount of heat transfer from the combustion chamber.; A test of these qualitative findings of MIGC methods is sought by comparison of predictions of the elaborate engine simulation code ENGSIM. The exhaust temperature where predicted, for example, within 5% of the code. (Abstract shortened with permission of author).