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The effects of EGR and injection timing on the engine combustion and PM emission performances fueled with diesel-ethanol blends

ABSTRACT
In this paper, an experimental study was carried out to assess the effects of diesel/ethanol blends, including pure diesel, diesel (90%)/ethanol (10%) (E10, by mass) and diesel (80%)/ethanol (20%) (E20), on combustion and exhaust particulate matter (PM) emissions characteristics in a four-cylinder diesel engine under a low engine load condition with different injection timings and exhaust gas recirculation (EGR) ratios. Results indicated that ethanol addition delayed the ignition timing and shortened the combustion duration, meanwhile, produced higher brake thermal efficiency (BTE) and lower brake specific fuel consumption (BSFC). Moreover, the total particulate and nucleation mode particle (particle size (Dp) <50 nm) number concentrations were increased and the total particulate mass and the accumulation mode (50 nm Keywords: diesel engine, diesel/ethanol, combustion characteristics, particulate matter
KEYWORDS
PAPER SUBMITTED: 2017-11-19
PAPER REVISED: 2017-12-23
PAPER ACCEPTED: 2018-01-11
PUBLISHED ONLINE: 2018-02-18
DOI REFERENCE: https://doi.org/10.2298/TSCI171119011L
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