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

S. T.P. Purayil, S. A.B. Al-Omari, E. Elnajjar

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)910-922
Number of pages13
JournalInternational Journal of Hydrogen Energy
Volume49
DOIs
Publication statusPublished - Jan 2 2024

Keywords

  • Combustion
  • Cyclic variation
  • Dual-fuel engine
  • Gasoline injection
  • Hydrogen addition
  • Hydrogen-gasoline

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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