Engine Performance and Exhaust Characteristics of Direct-injection Diesel Engine Operated with DME

Kajitani, Shuichi; Chen, Z. L.; Konno, Mitsuru; Rhee, K. T.

doi:10.4271/972973

Cited by 167 publications

(99 citation statements)

References 9 publications

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“…Smoke, THC and NO x emission for DME and diesel from a single cylinder of 638 cm 3 DI compression-ignition engine [33]. longer in the initial combustion period due to the shorter ignition delay of DME [39]. When injection retardation is optimized for each fuel, NO x from DME is lower than from diesel fuel [39,40].…”

Section: No Xmentioning

confidence: 99%

“…longer in the initial combustion period due to the shorter ignition delay of DME [39]. When injection retardation is optimized for each fuel, NO x from DME is lower than from diesel fuel [39,40]. Teng et al [11] suggested that, although DME is an oxygenated fuel, the release of free oxygen is very limited as revealed by chemical kinetics calculations [12] which makes the effect of the oxygen content in DME on NO x formation insignificant.…”

Section: No Xmentioning

confidence: 99%

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The potential of di-methyl ether (DME) as an alternative fuel for compression-ignition engines: A review

Arcoumanis

Bae

Crookes

et al. 2008

Fuel

909

412

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Citation: Arcoumanis, C., Bae, C., Crookes, R. and Kinoshita, E. (2008). The potential of di-methyl ether (DME) as an alternative fuel for compression-ignition engines: A review. Fuel, 87(7), pp. 1014-1030. doi: 10.1016/j.fuel.2007.06.007 This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent AbstractThis paper reviews the properties and application of di-methyl ether (DME) as a candidate fuel for compression-ignition engines. DME is produced by the conversion of various feedstock such as natural gas, coal, oil residues and bio-mass. To determine the technical feasibility of DME, the review compares its key properties with those of diesel fuel that are relevant to this application. DME's diesel engine-compatible properties are its high cetane number and low auto-ignition temperature. In addition, its simple chemical structure and high oxygen content result in soot-free combustion in engines. Fuel injection of DME can be achieved through both conventional mechanical and current common-rail systems but requires slight modification of the standard system to prevent corrosion and overcome low lubricity. The spray characteristics of DME enable its application to compression-ignition engines despite some differences in its properties such as easier evaporation and lower density. Overall, the low particulate matter production of DME provides adequate justification for its consideration as a candidate fuel in compression-ignition engines. Recent research and development shows comparable output performance to a diesel fuel led engine but with lower particulate emissions. NO x emissions from DME-fuelled engines can meet future regulations with high exhaust gas recirculation in combination with a lean NO x trap. Although more development work has focused on medium or heavy-duty engines, this paper provides a comprehensive review of the technical feasibility of DME as a candidate fuel for environmentally-friendly compression-ignition engines independent of size or application.

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Section: No Xmentioning

confidence: 99%

Section: No Xmentioning

confidence: 99%

The potential of di-methyl ether (DME) as an alternative fuel for compression-ignition engines: A review

Arcoumanis

Bae

Crookes

et al. 2008

Fuel

909

412

View full text Add to dashboard Cite

show abstract

“…Because the engine was not able to be operated for Modes 4 and 8 for each additive, the data is presented in a mode by mode The effect seen in Mode 7 by comparing the baseline diesel to the DME-diesel blends may be due to a change in the injection timing. As shown in Figure 4-2 and Figure 4-3, the injection timing and injection pressure were changing as commanded by the engine [85]. Their work showed that as the mean effective pressure increases, which correlates with increasing load for an engine speed of 960 RPM combusting diesel fuel, so do soot emissions based on the Bosch Smoke Number.…”

Section: Particulatesmentioning

confidence: 96%

“…Other tests determined that lower injector opening pressure reduces NO x , and nozzle types did not seem to influence NO x emissions. Experiments by Kajitani and coworkers [85] also showed the effects of injection timing on reducing NO x , which had little effect on HC emissions, from a single cylinder Yanmar engine fueled with neat DME. Recently, experiments completed by Ikeda and coworkers [86] with a single cylinder engine using a binary fuel injection method, showed similar NO x emissions between diesel fuel and 40 volume % DME mixed with diesel fuel, as injection timing was retarded.…”

Section: Research With Dme In Engine Applicationsmentioning

confidence: 99%

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Dimethyl Ether (Dme)-Fueled Shuttle Bus Demonstration Project

Chapman¹,

Bhide²,

Stefanik³

et al. 2003

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Several oxygenates have been proposed and tested for use with or as diesel fuel. This paper examines two such oxygenates, CETANER TM and dimethyl ether (DME), partially or wholly produced by Air Products and Chemicals, Inc's Liquid Phase Technology. In previous studies on a single cylinder compression ignition engine and a Volkswagen TDI four cylinder engine, significant reductions in particulate matter emissions were observed with blends of CETANER TM in diesel fuel. In this study, experiments were performed on a multicylinder Navistar 7.3L Turbodiesel engine confirmed and extended the observations from the earlier studies. This is an important step in not only showing that the fuel does perform on each type of engine in similar fashion, but also in showing that DME and its derivatives can give consistent, significant results in lowering emissions. The oxygenated fuels were blended to achieve a net addition of 2 wt.% oxygen in the blended fuel. A pressurized fueling system was developed to deliver mixtures of DME-diesel at up to 1 MPa (150 psi). With the DME-diesel blend, less consistent emissions results were obtained owing to an inability to sufficiently the fuel in the rail.

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