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The task of “Around the world in 80 days on 1000 liters of fuel” was successfully accomplished on the 3rd of August 2000. Volkswagen has set up a formidable record with its Lupo 3L TDI, the world's first ever 3 liters car. In 80 days this car traveled 33333 kilometers across 5 continents using only 792.57 liters of fuel. 2.38 liters per 100 kilometers, equal to 98.9 miles/gallon, at an average speed of 85.6 km/h, what has never been done before. Beside other features of the car and the drive train, credit must be given to the 1.2 liter Diesel engine equipped with Unit Injectors. Further improvement of the fuel consumption and emissions might be reached with Diesel-like and S.I.-like Stratified Charge engines as discussed in this paper.

The paper presents the thermodynamic analysis of the engine supplied with small and large diesel fuel doses while increasing natural gas quantity. The paper presents changes in the combustion process thermodynamic indexes and changes in the exhaust gas emissions for dynamically increased share of the gaseous fuel. The cylinder pressure history was subject to thermodynamic analysis, . based on which the mean indicated pressure, the heat release rate, the quantity of heat released as well as the pressure rate increase after self-ignition were determined. These parameters were also referred to the subsequent engine operation cycles by specifying the scope of the change per cycle. The relationship between the engine load and the start, the center and the end of combustion while increasing the gas amount supplied to the cylinder was indicated.