The Influence of Fuel Composition on Pollutant Emission of Premixed Spark Ignition Engines in Presence of EGR Istituto Motori C.N.R. - Italy

Format:

Conference/Event

Author/Creator:

Diana, S., author.

Conference Name:

International Fall Fuels & Lubricants Meeting & Exposition (1998-10-19 : San Francisco, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1998

Summary:

A fuel matrix consisting of twelve gasolines was tested in presence of Exhaust Gas Recirculation (EGR). The fuels have different percentages of aromatics (2035% volume), olefins (515% volume) and oxygen (02% wgt). Four different oxygenated compounds (MTBE, ETBE, TAME, DIPE) were chosen as additives.Tests were carried out on a MPI premixed spark ignition engine at steady operating conditions (2000 rpm, 2 bar BMEP, 13.5% EGR) and stoichiometric air/fuel ratio. Regulated and unregulated pollutants were measured upstream the catalytic converter. Cyclic variation of Indicated Mean Effective Pressure (IMEP) in presence of EGR was also evaluated.The adoption of EGR increases PAH and aldehydes emissions, and decreases benzene emissions of unoxygenated fuels. Conversion efficiencies of CO and of total HC are lowered by EGR. An increase of aromatics content in an unoxygenated fuel leads to higher engine out NOx emission. This effect is reduced if MTBE is added. In presence of EGR, the addition of oxygenated compounds as MTBE, ETBE, TAME, DIPE reduces 1-3 butadiene emission but it can increase aldehydes

Notes:

Vendor supplied data

Publisher Number:

982621

Access Restriction:

Restricted for use by site license