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Combustion and emission characteristics of a 2.2L common-rail diesel engine fueled with jatropha oil, soybean oil, and diesel fuel at various EGR-rates

  • To investigate the combustion and emission behavior of straight vegetable oils (SVO), jatropha oil, soybean oil, and diesel fuel were tested. For this research, a 2.2L common-rail engine with a two-stage turbocharging concept was equipped with a cylinder pressure indication system, an exhaust-gas analyzer, an AVL Micro Soot sensor and a Scanning Mobility Particle Sizer 3936 (SMPS) device to detect the particle-size-distribution (PSD). At a low and mid-load engine-operating point (EOP), the thermodynamic and emissions were investigated under various exhaust gas recirculation (EGR) rates with respect to the PSD. Moreover, the injection behavior of the three test fuels was analyzed separately using an injection rate analyzer. This procedure facilitates the thermodynamic investigations of the engine process and allows the calculation of the hydraulic delay (HD) as well as the ignition delay (ID). The ID of the SVO fuels compared to diesel fuel was found to be lower at all engine-operating modes, while jatropha oil always showed the shortest ID. In the particulate-nitrogen oxide (NOX) trade-off, the SVO fuels showed higher particulate matter (PM) emissions at the low-load EOP, whereas the PM emissions of diesel fuel overtop the SVO fuels at a higher engine load. With increased EGR-rates, a rise in the particle size was observed for all fuels. At the low-load EOP, the SVO fuels showed larger particles for high EGR-rates. This effect also changed by increasing the engine-load to the mid-load EOP, wherein the particle size of the diesel fuel emissions is higher by applying elevated EGR-rates.

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Metadaten
Author:Alexander Koder, Peter SchwanzerORCiD, Florian ZacherlORCiD, Hans-Peter Rabl, Wolfgang Mayer, Georg Gruber, Thomas Dotzer
DOI:https://doi.org/10.1016/j.fuel.2018.04.147
Parent Title (English):Fuel
Publisher:Elsevier
Document Type:Article
Language:English
Year of first Publication:2018
Release Date:2022/03/29
Tag:BEHAVIOR; BLENDS; Exhaust gas recirculation; IGNITION; INJECTION; Jatropha oil; KARANJA; PERFORMANCE; Particle-size-distribution; RME; Soybean oil; Straight vegetable oil combustion; VEGETABLE-OILS
Volume:228
Issue:September
First Page:23
Last Page:29
Institutes:Fakultät Maschinenbau
Fakultät Maschinenbau / Combustion Engines and Emissions Control Laboratory (CEEC)
Begutachtungsstatus:peer-reviewed
research focus:Energie und Mobilität
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG