Engine Thermal Efficiency versus Fuel Availability

The higher thermal efficiency of diesel engine over gasoline engine has been known. Recent developments show that more and more compact diesel engines come into the market. Therefore, diesel engines will not only be used for trucks and buses, but also for jeeps and passenger cars. However, concerning the increasing demand of diesel engines in the automotive field, the fuel availability must be considered as one of the very important parameters for engine selection. In the paper the basic consideration will be put forward and the methodology will be developed so that alternative soluctions can be shown.