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Silniki tłokowe zasilane paliwem wodorowym: badania i rozwój, doświadczenia

Kovar Z., Scholz C., Beroun S., Nydrle M, Drozda H., Blazek J., Svoboda M.

Silniki Spalinowe

2006

R. 45, nr 2

28-36

W artykule przedstawiono wyniki badań eksperymentalnych silników zasilanych wodorem obejmujące: tworzenie mieszanki palnej, spalanie mieszanki powietrza i wodoru dla różnego jej składu, tworzenie tlenków azotu, parametry pracy silnika. Prace badawczo-rozwojowe przeprowadzono na jednocylindrowym silniku doświadczalnym (wolnossącym i doładowanym) oraz na turbodoładowanym sześciocylindrowym silniku doświadczalnym.

Results of experimental works on hydrogen testing engines are presented in the paper: mixture forming, burning of air-hydrogen mixtures with different air/fuel ratio, NOx production, power parameters. The R&D works were realized on a single cylinder test engine (both natural aspirated and supercharged) and on a turbocharged six cylinder test engine as well.

Combustion variability of spark ignition hydrogen fuelled engine

Berun S., Scholz C., Salhab Z., Zuzanek L.

Journal of KONES

1999

Vol. 6, No. 3-4

1-6

Cyclic variability of combustion process in spark-ignition (SI) engines, manifested by variations in combustion pressure near the peaks of pressure, is a long-term problem and a contemporary one. Coefficient of MIP (mean indicated pressure) variation is one of the most significant parameters of combustion variability, which affects the fuel efficiency and toxic components of exhaust gas emissions. In the paper, they are presented some of results, which are obtained from the research work of the hydrogen combustion in SI engine. The presentation of results is intended on the following areas: - Effect air excess ratio (lambda) on coefficient of MIP variation (VARpi) with hydrogen and CNG fuels. It was also watched behaviour of extremely lean mixture of hydrogen fuel. - Effect of rate of heat release (ROHR) on VARpi. ROHR were watched in different stages of burning with known parameters of heat release (0.5%; 5%; 50%) at equal VARpi for different hydrogen and CNG fuels. The priority purpose is to inquire, that VARpi, are caused by ROHR.