Impact of Engine Operating Conditions on Low-NOx Emissions in a Light-Duty CIDI Engine Using Advanced Fuels

Gonzalez, A D Manuel; Clark, Wendy; Wolf, Leslie R.; Garbak, J.; Wright, Kenneth J.; Natarajan, Mani; Yost, Douglas M.; Frame, Edwin A; Kenney, Thomas E.; Ball, James C.; Wallace, James P.; Hilden, David L.; Eng, King D.

doi:10.4271/2002-01-2884

Cited by 14 publications

(2 citation statements)

References 13 publications

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“…Based on total PM emissions and other considerations, dibutyl maleate and tripropylene glycol monomethyl ether were identified as the most promising oxygenated compounds for future engine testing. These more extensive engine tests carried out in several engine operating modes confirmed high efficiency of the abovementioned oxygenates in PM emissions reduction and showed that these oxygenates had no unfavorable influence on NO x emissions [19].…”

Section: The Essence Of Application Of Oxygenated Diesel Fuelsmentioning

confidence: 54%

The Study on the Influence of Diesel Fuel Oxygenates on Exhaust Emissions

Kozak¹

2016

Alternative Fuels, Technical and Environmental Conditions

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The study discusses the use of oxygenated fuels in reduction of exhaust emissions from diesel engines. The study analyzes the physicochemical properties of oxygenated compounds in diesel fuels based on which 12 such compounds were selected for experimental research (glycol ethers, maleates, carbonates and alcohols). The study presents the results of investigations of the influence of oxygenated fuels on the exhaust emissions under dynamic homologation cycle chassis dynamometer conditions (diesel passenger vehicle, NEDC and FTP-75 cycles). The relationship among the content of individual oxygenated compounds, the conditions of the tests cycle and the exhaust emissions has been ascertained. The performed studies and experimental research have shown that the application of oxygenated fuels in diesel engines results in a significant reduction of the PM emission at a small increase in the emission of NO x. Changes in the emission of CO and HC depend not only on the oxygen content in the fuel but also on the self-ignition quality of the applied oxygenated compounds. The application of oxygenated fuels does not influence the emission of CO 2. Out of the analyzed oxygenated compounds, the most advantageous emission changes (reduction of the emission of PM, CO and HC at a small increase in the emission of NO x) are generated by the compounds of the glycol ethers group.

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Section: The Essence Of Application Of Oxygenated Diesel Fuelsmentioning

confidence: 54%

The Study on the Influence of Diesel Fuel Oxygenates on Exhaust Emissions

Kozak¹

2016

Alternative Fuels, Technical and Environmental Conditions

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“…The study also investigated the effectiveness of a diesel oxidation catalyst (DOC) on the destruction of CO, HC and formaldehyde, as well as the reduction of PM, and found that the DOC was effective at reducing all four, even at the lower exhaust temperatures resulting from RCCI operation. Further MCE investigations by Curran et al 16 looked at estimating the drive-cycle performance of RCCI using the ad hoc modal points that loosely approximate the federal light-duty drive cycle 17–19 and compared RCCI emissions and efficiency to CDC and diesel PCCI. The study found that low-load operation of RCCI was possible, but a mismatch of turbomachinery at the lower engine speed/load points (due to lower exhaust enthalpy) and high fraction of diesel fuel required to maintain stable combustion offered little reduction in NO X emissions compared to CDC, which uses a high EGR fraction during those points.…”

Section: Introductionmentioning

confidence: 99%

Reactivity controlled compression ignition combustion on a multi-cylinder light-duty diesel engine

Curran

Hanson

Wagner

2012

International Journal of Engine Research

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Reactivity controlled compression ignition is a low-temperature combustion technique that has been shown, both in computational fluid dynamics modeling and single-cylinder experiments, to obtain diesel-like efficiency or better with ultra-low nitrogen oxide and soot emissions, while operating primarily on gasoline-like fuels. This paper investigates reactivity controlled compression ignition operation on a four-cylinder light-duty diesel engine with production-viable hardware using conventional gasoline and diesel fuel. Experimental results are presented over a wide speed and load range using a systematic approach for achieving successful steady-state reactivity controlled compression ignition combustion. The results demonstrated diesel-like efficiency or better over the operating range explored with low engine-out nitrogen oxide and soot emissions. A peak brake thermal efficiency of 39.0% was demonstrated for 2600 r/min and 6.9 bar brake mean effective pressure with nitrogen oxide emissions reduced by an order of magnitude compared to conventional diesel combustion operation. Reactivity controlled compression ignition emissions and efficiency results are compared to conventional diesel combustion operation on the same engine.

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