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Hydrogen-fueled diesel engine without timed ignitionExperiments were carried out to investigate the feasibility of converting a diesel engine to hydrogen-fueled operation without providing a timed ignition system. Use was made of a glow plug and a multiple-strike spark plug. The glow plug was found to provide reliable ignition and smooth engine operation. It caused the hydrogen to ignite almost immediately upon the start of injection. Indicated mean effective pressures were on the order of 1.3 MPa for equivalence ratios between 0.1 and 0.4 at a compression ratio of 18. This is significantly higher than the corresponding result obtained with diesel oil (about 0.6 MPa for equivalence ratios between 0.3 and 0.9). Indicated thermal efficiencies were on the order of 0.4 for hydrogen and 0.20-0.25 for diesel oil. Operation with the multiple-strike spark system yielded similar values for IMEP and efficiency, but gave rise to large cycle-to-cycle variations in the delay between the beginning of injection and ignition. Large ignition delays were associated with large amplitude pressure waves in the combustion chamber. The measured NO(x) concentrations in the exhaust gas were of the order of 50-100 ppm. This is significantly higher than the corresponding results obtained with premixed hydrogen and air at low equivalence ratios. Compression ignition could not be achieved even at a compression ratio of 29.
Document ID
19790070284
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Homan, H. S.
(Cornell Univ. Ithaca, NY, United States)
De Boer, P. C. T.
(Cornell Univ. Ithaca, NY, United States)
Mclean, W. J.
(Cornell University Ithaca, N.Y., United States)
Reynolds, R. K.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Publication Information
Publication: International Journal of Hydrogen Energy
Volume: 4
Issue: 4, 19
Subject Category
Inorganic And Physical Chemistry
Accession Number
79A54297
Distribution Limits
Public
Copyright
Other

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