Experimental Comparative Study on Performance and Emissions of E85 Adopting Different Injection Approaches in a Turbocharged PFI SI Engine

Cinzia Tornatore, Luca Marchitto, Maria Antonietta Costagliola and Gerardo Valentino
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Cinzia Tornatore: Istituto Motori-CNR-via Marconi, 4-80125 Napoli, Italy
Luca Marchitto: Istituto Motori-CNR-via Marconi, 4-80125 Napoli, Italy
Maria Antonietta Costagliola: Istituto Motori-CNR-via Marconi, 4-80125 Napoli, Italy
Gerardo Valentino: Istituto Motori-CNR-via Marconi, 4-80125 Napoli, Italy

Energies, 2019, vol. 12, issue 8, 1-15

Abstract: This study examines the effects of ethanol and gasoline injection mode on the combustion performance and exhaust emissions of a twin cylinder port fuel injection (PFI) spark ignition (SI) engine. Generally, when using gasoline–ethanol blends, alcohol and gasoline are externally mixed with a specified blending ratio. In this activity, ethanol and gasoline were supplied into the intake manifold into two different ways: through two separated low pressure fuel injection systems (Dual-Fuel, DF) and in a blend (mix). The ratio between ethanol and gasoline was fixed at 0.85 by volume (E85). The initial reference conditions were set running the engine with full gasoline at the knock limited spark advance boundary, according to the standard engine calibration. Then E85 was injected and a spark timing sweep was carried out at rich, stoichiometric, and lean conditions. Engine performance and gaseous and particle exhaust emissions were measured. Adding ethanol could remove over-fueling with an increase in thermal efficiency without engine load penalties. Both ethanol and charge leaning resulted in a lowering of CO, HC, and PN emissions. DF injection promoted a faster evaporation of gasoline than in blend, shortening the combustion duration with a slight increase in THC and PN emissions compared to the mix mode.

Keywords: E85; ethanol; port fuel injection; dual fuel; spark ignition engine; particles; particulate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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