Additive manufacturing new piston design and injection strategies for highly efficient and ultra-low emissions combustion in view of 2030 targets

Blasio, Gabriele Di; Ianniello, Roberto; Tunestål, Per; Pesce, Francesco Concetto; Vassallo, Alberto; Belgiorno, Giacomo

doi:10.1016/j.fuel.2023.128270

Cited by 14 publications

(2 citation statements)

References 31 publications

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“…Studies reported an improvement in soot reduction and efficiency compared to the previous piston designs [24]. However, an increase in HC emissions has also been reported using this geometry [29], mainly at higher loads. This effect has been related to promoting lean mixture regions and spray impingement on the piston and liner surface.…”

Section: Introductionmentioning

confidence: 86%

A Synergic Application of High-Oxygenated E-Fuels and New Bowl Designs for Low Soot Emissions: An Optical Analysis

et al. 2023

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Synthetic fuels significantly reduce pollutant emissions and the carbon footprint of ICE applications. Among these fuels, oxymethylene dimethyl ethers (OMEX) are an excellent candidate to entirely or partially replace conventional fuels in compression ignition (CI) engines due to their attractive properties. The very low soot particle formation tendency allows the decoupling of the soot-NOX trade-off in CI engines. In addition, innovative piston geometries have the potential to reduce soot formation inside the cylinder in the late combustion stage. This work aims to analyze the potential of combining OMEX with an innovative piston geometry to reduce soot formation inside the cylinder. In this way, several blends of OMEX-Diesel were tested using a radial-lips bowl geometry and a conventional reentrant bowl. Tests were conducted in an optically accessible engine under simulated EGR conditions, reducing the in-cylinder oxygen content. For this purpose, 2-colour pyrometry and high-speed excited state hydroxyl chemiluminescence techniques were applied to trace the in-cylinder soot formation and oxidation processes. The results confirm that increasing OMEX in Diesel improves the in-cylinder soot reduction under low oxygen conditions for both piston geometries. Moreover, using radial lips bowl geometry significantly improves the soot reduction, from 17% using neat Diesel to 70% less at the highest OMEX quantity studied in this paper.

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Section: Introductionmentioning

confidence: 86%

A Synergic Application of High-Oxygenated E-Fuels and New Bowl Designs for Low Soot Emissions: An Optical Analysis

et al. 2023

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“…Generally, the formation of NOx in the cylinder is related to the combustion efficiency. This can be achieved through various means including the utilization of a steel piston with an innovative bowl geometry, 5 implementing the Miller cycle with variable compression ratio function, 6 adopting new clean energy sources like methyl ester fuel 7 and hydrotreated vegetable oil, 8 introducing exhaust gas recirculation (EGR), 9 and the meticulous calibration of injection parameters such as pilot injection, 10 injection timing, 11 and duration and fuel amount. 12 To effectively tackle NOx emissions, after-treatment techniques such as selective catalytic reduction (SCR), 13 an SCR catalyst-coated diesel particulate filter (SDPF), 14 and a lean NOx trap (LNT) 15 are employed for the conversion of NOx emissions.…”

Section: Introductionmentioning

confidence: 99%

Study on Control Strategies on NO_X Emissions to Meet Real Driving Emissions

Chen,

Su,

Xiaoping

et al. 2023

ACS Omega

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The aim of this study was to fulfill the NOx emissions standards for a light-duty diesel vehicle under real driving emissions (RDE) testing conditions by implementing various control strategies. In this study, RDE tests were performed by adjusting the air mass quantity and postinjection quantity in order to analyze engine-out and tail-pipe nitrogen oxides (NOx) emissions for different phases of RDE. The results showed that reducing in air mass quantity enabled the engine to operate in higher exhaust gas recirculation (EGR) rate regions, resulting in a 32.5% reduction in engine-out NOx emissions and an 80.4% decrease in tail-pipe NOx emissions. Increasing the postinjection quantity primarily enhanced the NOx conversion efficiency for the urban phase by 7.5%, leading to a 22.6% reduction in tail-pipe NOx emissions. By employing both strategies, vehicles can comfortably meet the CN6b emission regulations by a substantial margin.

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Cobalt chromite nanoparticle effects on kapok diesel emulsion performance and emission characteristics at various injection pressures

Anbarasan,

Muralidharan,

Sakthi Rajan

et al. 2024

Env Prog and Sustain Energy

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Alternative fuels derived from vegetable oil have great potential as diesel fuel replacements in the transportation and manufacturing sectors. The aim of this study is to use cobalt chromite nanoparticles as a fuel additive with biodiesel in engine and to experimentally investigate the influence of injection pressure on combustion parameters. As an addition, cobalt chromite nanoparticles are used with biodiesel made from kapok oil, which is blended with mineral diesel at a ratio of 20:80. The engine is operated at various injection pressures (200–260 bar) and with an 80 ppm nanoparticle concentration. The results have shown that the increased injection pressure caused by the use of nanoparticles enhances engine combustion properties, such as the peak pressure and the rate of heat release. The main purpose of this research was to investigate the effects of a CoCr2O4 + KME20 mix on a CI engine, with the hope of improving engine performance characteristics. This investigation examines the effects of varying test fuel injection pressures. The increased injection pressure of CoCr2O4 + KME20 resulted in better performance and combustion. The 240‐bar IP was shown to be superior to lower IPs because of its greater penetration length and more uniform formation. The IP rating of 240 bar represented a significant improvement over competing products with respect to emission controls. In addition to reducing our reliance on fossil fuels, this also prevents harmful chemicals from being released into the air.

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Additive manufacturing new piston design and injection strategies for highly efficient and ultra-low emissions combustion in view of 2030 targets

Cited by 14 publications

References 31 publications

A Synergic Application of High-Oxygenated E-Fuels and New Bowl Designs for Low Soot Emissions: An Optical Analysis

A Synergic Application of High-Oxygenated E-Fuels and New Bowl Designs for Low Soot Emissions: An Optical Analysis

Study on Control Strategies on NO_X Emissions to Meet Real Driving Emissions

Cobalt chromite nanoparticle effects on kapok diesel emulsion performance and emission characteristics at various injection pressures

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Additive manufacturing new piston design and injection strategies for highly efficient and ultra-low emissions combustion in view of 2030 targets

Cited by 14 publications

References 31 publications

A Synergic Application of High-Oxygenated E-Fuels and New Bowl Designs for Low Soot Emissions: An Optical Analysis

A Synergic Application of High-Oxygenated E-Fuels and New Bowl Designs for Low Soot Emissions: An Optical Analysis

Study on Control Strategies on NOX Emissions to Meet Real Driving Emissions

Cobalt chromite nanoparticle effects on kapok diesel emulsion performance and emission characteristics at various injection pressures

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Study on Control Strategies on NO_X Emissions to Meet Real Driving Emissions