Open AccessTHE EFFECT OF ADDING HYDROGEN ON THE PERFORMANCE AND THE CYCLIC VARIABILITY OF A SPARK IGNITION ENGINE POWERED BY NATURAL GAS
Author(s) -
Andrej Chríbik,
Marián Polóni,
Ján Lach,
Branislav Ragan
Publication year - 2014
Publication title -
acta polytechnica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.207
H-Index - 15
eISSN - 1805-2363
pISSN - 1210-2709
DOI - 10.14311/ap.2014.54.0010
Subject(s) - hydrogen , spark (programming language) , combustion , spark ignition engine , flammability limit , ignition system , ignition timing , mean effective pressure , lean burn , natural gas , materials science , analytical chemistry (journal) , nuclear engineering , thermodynamics , chemistry , organic chemistry , compression ratio , engineering , physics , computer science , programming language , nox
This paper deals with the influence of blending hydrogen (from 0 to 50% vol.) on the parameters and the cyclic variability of a Lombardini LGW702 combustion engine powered by natural gas. The experimental measurements were carried out at various air excess ratios and at various angles of spark advance, at an operating speed of 1500 min −1 . An analysis of the combustion pressure showed that as the proportion of hydrogen in the mixture increases, the maximum pressure value also increases. However, at the same time the cyclic variability decreases. Both the ignition-delay period and the period of combustion of the mixture become shorter, which requires optimization of the spark advance angle for various proportions of hydrogen in the fuel. The increasing proportion of hydrogen extends the flammability limit to the area of lean-burn mixtures and, at the same time, the coefficient of cyclic variability of the mean indicated pressure decreases.