Spray characterization of DMC and MeFo on multi-hole injectors for highly boosted DISI combustion engines

Plaß, Alexander; Maliha, Malki; Kubach, Heiko; Koch, Thomas

doi:10.1177/14680874211038101

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…The image rate used was 8 kHz, and the resolution of the image was 0.17 mm/pixel. For the analysis, the penetration length and the projected spray area were determined using a Matlab script described by [19], and the average of five measurements was used. In addition, the shape of the spray was observed based on the time series of each injection.…”

Section: Pressure Chambermentioning

confidence: 99%

“…Due to the measurement methodology, only fuel droplets-and no gaseous phase-could be measured. A detailed explanation of the measurement setup and the calculation method used is given in [19].…”

Section: Pressure Chambermentioning

confidence: 99%

“…For example, the spray shape, the penetration length and the spray area have a significant influence on the spray targeting and the homogenization of the air and the fuel in the combustion chamber, which has a major impact on the emissions. The authors of [19][20][21] pointed out a significant influence of fuel characteristics on the mentioned spray parameters. Due to different boiling and vapor temperatures, effects such as flash boiling and spray collapse have to be considered.…”

Section: Spray Analysismentioning

confidence: 99%

See 2 more Smart Citations

Further Development of Gasoline from the bioliq® Process with Focus on Particulate and Hydrocarbon Emissions

Michler

Niethammer

Fuchs

et al. 2023

Fuels

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The production of CO2-neutral fuels is a key technology to achieve the European Union’s targets of greenhouse gas reduction in the transport sector. For a straightforward application such as drop-in fuel, regenerative gasoline must meet emission requirements without causing significant changes in engine parameters. The objective of this work was to demonstrate the emission reduction potential of fuel from the bioliq® plant by reducing the content of heavy aromatics in the product refinement. For three blends with varying contents of bioliq® fuel, the spray behavior was studied in a pressurized chamber and the particulate and hydrocarbon emissions were investigated using a single-cylinder research engine. With increasing bioliq® fuel content, atomization was degraded by lower flash boiling at low pressure. This effect vanished at higher chamber pressures. Measurements of particulate and hydrocarbon emissions showed significant improvements of 50% to 100% and 10%, respectively, compared to previously investigated bioliq® fuel fractions from 2017. The formation of particulate emissions is virtually unaffected by the blending of bioliq® fuel, due to the absence of heavy aromatics in the refined bioliq® product. Hydrocarbon emissions increased by 20% with higher bioliq® fuel content and late injection timings due to inferior mixture formation as a result of slightly reduced atomization. However, near the optimum injection timing, the hydrocarbon emissions are independent of the bioliq® fuel admixture.

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Section: Pressure Chambermentioning

confidence: 99%

Section: Pressure Chambermentioning

confidence: 99%

Section: Spray Analysismentioning

confidence: 99%

See 1 more Smart Citation

Further Development of Gasoline from the bioliq® Process with Focus on Particulate and Hydrocarbon Emissions

Michler

Niethammer

Fuchs

et al. 2023

Fuels

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Spray dynamics of synthetic dimethyl carbonate and its blends with gasoline

Huang

Pratama

Oguma

et al. 2023

Fuel

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Potential Analysis of Defossilized Operation of a Heavy-Duty Dual-Fuel Engine Utilizing Dimethyl Carbonate/Methyl Formate as Primary and Poly Oxymethylene Dimethyl Ether as Pilot Fuel

Mühlthaler,

Härtl,

Jaensch

2024

Engines

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<div>This study demonstrates the defossilized operation of a heavy-duty port-fuel-injected dual-fuel engine and highlights its potential benefits with minimal retrofitting effort. The investigation focuses on the optical characterization of the in-cylinder processes, ranging from mixture formation, ignition, and combustion, on a fully optically accessible single-cylinder research engine. The article revisits selected operating conditions in a thermodynamic configuration combined with Fourier transform infrared spectroscopy.</div> <div>One approach is to quickly diminish fossil fuel use by retrofitting present engines with decarbonized or defossilized alternatives. As both fuels are oxygenated, a considerable change in the overall ignition limits, air–fuel equivalence ratio, burning rate, and resistance against undesired pre-ignition or knocking is expected, with dire need of characterization.</div> <div>Two simultaneous high-speed recording channels granted cycle-resolved access to the natural flame luminosity, which was recorded in red/green/blue and OH chemiluminescence.</div> <div>Selected conditions were investigated in more detail with the simultaneous application of planar laser-induced fluorescence of OH and HCHO and recording natural flame luminescence in a cycle-averaged manner.</div> <div>Poly oxymethylene dimethyl ether was used as pilot fuel, building on prior investigations. The mixture of 65 vol% Dimethyl Carbonate and 35 vol% Methyl Formate with prior verification on a passenger-car-sized engine substitutes synthetic natural gas in this study.</div> <div>Thermodynamically, the increased compression ratio up to 17.6 resulted in feasible operation and increased indicated efficiency. On the lower compression ratio of 15.48, a more comprehensive range of applicable air–fuel equivalence ratios and increased degrees of freedom regarding the pilot’s total energy share are observed compared to the base configuration with natural gas and EN590 as pilot fuel.</div> <div>The air–fuel equivalence ratio sweep from λ = 1.0–2.0 revealed predominantly premixed and high-temperature heat release via OH*. The temporal and spatial evolution shifts while leaning out the mixture with increasing gradients on the radial distribution and decouples for lean mixtures from the initial spray trajectory.</div>

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Spray characterization of DMC and MeFo on multi-hole injectors for highly boosted DISI combustion engines

Cited by 5 publications

References 29 publications

Further Development of Gasoline from the bioliq® Process with Focus on Particulate and Hydrocarbon Emissions

Further Development of Gasoline from the bioliq® Process with Focus on Particulate and Hydrocarbon Emissions

Spray dynamics of synthetic dimethyl carbonate and its blends with gasoline

Potential Analysis of Defossilized Operation of a Heavy-Duty Dual-Fuel Engine Utilizing Dimethyl Carbonate/Methyl Formate as Primary and Poly Oxymethylene Dimethyl Ether as Pilot Fuel

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