Experimental investigation of spark timing on extension of hydrogen knock limit and performance of a hydrogen-gasoline dual-fuel engine

This work focused on the influence of spark timing on the hydrogen knock limit and performance of a hydrogen-gasoline dual-fuel engine. A gasoline direct injection engine with hydrogen port induction was used for this study. The engine speed was kept at 1000 rpm, with a gasoline injection quantity o...

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Bibliographic Details
Published inInternational journal of hydrogen energy Vol. 49; pp. 910 - 922
Main Authors Purayil, S.T.P., Al-Omari, S.A.B., Elnajjar, E.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 02.01.2024
Subjects
Combustion
Cyclic variation
Dual-fuel engine
Gasoline injection
Hydrogen addition
Hydrogen-gasoline
Hydrogen addition
Gasoline injection
Hydrogen-gasoline
Combustion
Cyclic variation
Dual-fuel engine
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Summary:This work focused on the influence of spark timing on the hydrogen knock limit and performance of a hydrogen-gasoline dual-fuel engine. A gasoline direct injection engine with hydrogen port induction was used for this study. The engine speed was kept at 1000 rpm, with a gasoline injection quantity of 6 mg. The hydrogen flow rate was varied until engine knock was detected. The spark timing was varied from 4 to 36֯ CA BTDC with a step size of 4֯ CA. A higher hydrogen flow rate was achieved when the spark timing was retarded close to TDC. The addition of hydrogen increased the cylinder pressure, exhaust temperature, brake mean effective pressure, and brake thermal efficiency. Advancing the spark timing produced a prolonged flame development period and shorter flame propagation period. Cyclic variation increased and then decreased with spark advance. NOX emissions increased with increase in spark advance and hydrogen flow rate, whereas spark timing had little effect on CO2 and CO emissions. •Study of effect of spark timing in a hydrogen-gasoline dual fuel engine.•The hydrogen knock limit was considerably influenced by the spark timing.•The flame development period increased, and the flame propagation period decreased with the spark advancement.•COVPmax first increased and then decreased with advancing the spark timing.•Higher hydrogen flow rate was achieved with spark timings close to TDC.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2023.09.139