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dc.contributor.authorHlaing, Ponnya
dc.contributor.authorMarquez, Manuel Echeverri
dc.contributor.authorSingh, Eshan
dc.contributor.authorAlmatrafi, Fahad
dc.contributor.authorCenker, Emre
dc.contributor.authorBen Houidi, Moez
dc.contributor.authorJohansson, Bengt
dc.date.accessioned2020-03-22T05:58:48Z
dc.date.available2020-03-22T05:58:48Z
dc.date.issued2020-04-14
dc.identifier.urihttp://hdl.handle.net/10754/662246
dc.description.abstractPre-chamber spark ignition (PCSI) combustion is an emerging lean-burn combustion mode capable of extending the lean operation limit of an engine. The favorable characteristic of short combustion duration at the lean condition of PCSI results in high indicated efficiencies and low specific fuel consumption compared to conventional spark ignition combustion. Since the engine operation is typically lean, PCSI can significantly reduce engine-out NOx emissions while maintaining relatively short combustion duration. In this study, experiments were conducted on a heavy-duty engine at mid to low loads to study the effects of pre-chamber enrichment on globally lean combustion with methane fuel injection in both pre and main chambers. Two parametric variations were performed where, in the first study, the total fuel energy input to the engine was fixed while the intake pressure was varied, which resulted in varying the global air excess ratio. In the second, the intake pressure was fixed while the amount of fuel injection was changed to alter the global air excess ratio. At each global air excess ratio, the fuel injection to the pre-chamber was varied parametrically to assess the effect of pre-chamber enrichment on engine operating characteristics. Multi-chamber heat release analysis was performed in order to investigate the pre-chamber and main chamber heat release characteristics separately. The discharge coefficient of the pre-chamber nozzles was estimated by the model calibration using a 1-D GT Power Model. The analyzed data revealed two-stage combustion in the main chamber where the second stage is thought to be indicating auto-ignition of the main chamber charge. As the global air excess ratio became leaner, the combustion efficiency deteriorates as the emissions of HC and CO increased while NOx emission declined significantly. The resulting heat release data is presented alongside the engine-out specific emissions.
dc.description.sponsorshipThe paper is based upon work supported by Saudi Aramco Research and Development Center FUELCOM3 program under Master Research Agreement Number 6600024505/01. FUELCOM (Fuel Combustion for Advanced Engines) is a collaborative research undertaking between Saudi Aramco and KAUST intended to address the fundamental aspects of hydrocarbon fuel combustion in engines, and develop fuel/engine design tools suitable for advanced combustion modes. The author would like to thank King Abdullah University of Science and Technology (KAUST) and the Clean Combustion Research Center (CCRC) for lab facilities and research support. Last but not least, the authors would like to convey gratitude towards the IC Engine Lab Safety Supervisor Adrian I. Ichim and the lab technician Riyad H. Jambi for their kind input and assistance in performing the experiments.
dc.publisherThe Society of Automotive Engineers
dc.relation.urlhttps://saemobilus.sae.org/content/2020-01-0825/
dc.rightsArchived with thanks to The Society of Automotive Engineers
dc.titleEffect of Pre-chamber Enrichment on Lean Burn Pre-chamber Spark Ignition Combustion Concept with a Narrow-throat Geometry
dc.typeConference Paper
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.rights.embargodate2020-10-14
dc.conference.date14 April 2020
dc.conference.nameSAE World Congress Experience 2020
dc.conference.locationDetroit, USA
dc.eprint.versionPost-print
dc.contributor.institutionSaudi Aramco
pubs.publication-statusAccepted
kaust.personHlaing, Ponnya
kaust.personMarquez, Manuel Echeverri
kaust.personSingh, Eshan
kaust.personAlmatrafi, Fahad
kaust.personBen Houidi, Moez
kaust.personJohansson, Bengt
refterms.dateFOA2020-03-22T05:58:49Z
kaust.acknowledged.supportUnitClean Combustion Research Center (CCRC)


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