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Comparison the piston air engine performance with aviation gasoline (Avgas) or the E-85 ecological fuel supply

Balicki W., Irzycki A., Snopkiewicz K.

Journal of KONES

2010

Vol. 17, No. 3

25-32

The fuel presently used for feeding of aircraft piston engines (petrol including TEL) is characterized by "strong unfriendliness" for environment. Many research centres have been going on fuels investigation, which could substitute Avgas utilized in aviation. This is why are there no being in force for Europe standards defining the allowable emission of pollutions in exhaust gases of aircraft piston engines (equivalent to EURO - standards introduced for traction engines). The mixtures of gas o line and alcohols are tested as "alternative" aircraft fuels for spark ignition engines, and in case of Diesel engines - evenjet kerosene. During the research works on test bed carried out at Institute of Aviation the performance offour-stroke aircraft carburettor piston engine supplied by "classical" aircraft petrol and the E - 85 fuel (mixture of petrol and ethanol) were compared. Except for measuring the functional parameters of engine (rotational speed, torque, specific fuel consumption, pressures and temperatures) the emissions of gaseous pollutants incorporated in exhaust gas were measured and analyzed. The range of modifications of engine supply system - necessary to introduce in case of changing of fuel type within the tested engine -was worked up. There are foreseen comparative test of fuelling the engine with mixtures of petrol and alcohols in different proportions in the next phase of research works.

An effective method of creating dynamic characteristics using drive tests.

Brzozowski K., Romaniszyn K.

Archive of Mechanical Engineering

2003

Vol. L, nr 4

403-420

The paper presents the methodology for creating dynamic characteristics of fuel consumption and intensity of emission of toxic components of exhaust gas. The source of data is the result of model analysis of fuel consumption and emission intensity obtained from experimental drive tests. Two certified tests have been used: Europeans NEDC and American FTP-75. A general algorithm for obtaining dynamic characteristics in the form of approximated functions is formulated on the basis of measured data. Examples of characteristics obtained for a real car with spark ignition engine are presented. The results obtained from experimental measurements and numerical sumilations are compared and discussed.

W artykule przedstawiono metodykę tworzenia charakterystyk dynamicznych zużycia paliwa i natężenia emisji związków szkodliwych spalin. Jako źródło danych wykorzystano wyniki analizy modalnej natężenia emisji i zużycia paliwa uzyskane podczas realizacji omawianych tastów jezdnych. Wykorzystano dwa legislacyjne testy jezdne: europejski NEDC i amerykański FTP-75. Opisano ogólny algorytm tworzenia charakterystyk dynamicznych w postaci funkcji aproksymujących dane pomiarowe. W artykule przedstawiono również przykłady uzyskanych charakterystyk dynamicznych dla rzeczywistego samochodu z silnikiem z zapłonem iskrowym. Porównano i skomentowano wyniki otrzymane z badań rzeczywistych i symulacyjnych.