Influence of fuel properties on fundamental spray characteristics and soot emissions using different tailor-made fuels from biomass

García, Antonio; Monsalve‐Serrano, Javier; Heuser, Benedikt; Jakob, Markus; Kremer, Florian; Pischinger, Stefan

doi:10.1016/j.enconman.2015.11.010

Cited by 48 publications

(24 citation statements)

References 35 publications

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“…This phenomenon can create diffusion-controlled flames that can persist well after the first combustion phase [40]. Just before the opening of the exhaust valves, these flames produce soot that cannot be completely oxidized due to low temperatures in the cylinder [41].…”

Section: Soot Formationmentioning

confidence: 99%

Flame Front and Burned Gas Characteristics for Different Split Injection Ratios and Phasing in an Optical GDI Engine

2019

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Direct-injection in spark-ignition engines has long been recognized as a valid option for improving fuel economy, reducing CO2 emissions and avoiding knock occurrence due to higher flexibility in control strategies. However, problems associated with mixture formation are responsible for soot emissions, one of the most limiting factors of this technology. Therefore, the combustion process and soot formation were investigated with different injection strategies on a gasoline direct injection (GDI) engine. The experimental analysis was realized on an optically accessible single cylinder engine when applying single, double and triple injection strategies. Moreover, the effect of fuel delivery phasing was also scrutinized by changing the start of the injection during late intake- and early compression-strokes. The duration of injection was split in different percentages between two or three pulses, so as to obtain close to stoichiometric operation in all conditions. The engine was operated at fixed rotational speed and spark timing, with wide-open throttle. Optical diagnostics based on cycle resolved digital imaging was applied during the early and late stages of the combustion process. Detailed information on the flame front morphology and soot formation were obtained. The optical data were correlated to in-cylinder pressure traces and exhaust gas emission measurements. The results suggest that the split injection of the fuel has advantages in terms of reduction of soot formation and NOx emissions and a similar combustion performance with respect to the single injection timing. Moreover, an early injection resulted in higher rates of heat release and in-cylinder pressure, together with a reduction of soot formation and flame distortion. The double injection strategy with higher percentage of fuel injected in the first pulse and early second injection pulse showed the best results in terms of combustion evolution and pollutant emissions. For the operative condition studied, a higher time for mixture homogenization and split of fuel injected in the intake stroke shows the best results.

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Section: Soot Formationmentioning

confidence: 99%

Flame Front and Burned Gas Characteristics for Different Split Injection Ratios and Phasing in an Optical GDI Engine

2019

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“…An in-house developed 1D spray model called DICOM [28,29] are non-zero and zero, respectively. An extensive explanation of the calculation process and the hypotheses assumed by the model can be found in [31].…”

Section: Analysis Of Mixing Processmentioning

confidence: 99%

Impact of diesel pilot distribution on the ignition process of a dual fuel medium speed marine engine

Valladolid

Tunestål

Monsalve‐Serrano

et al. 2017

Energy Conversion and Management

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“…Engine and vehicle manufacturers are continuously working on developing new technologies [2] to increase fuel economy and reduce pollutant emissions [3] [4] according to requirements imposed by both users and regulations [5]. Historically, the higher efficiency of compression ignition (CI) engines than spark ignition (SI) engines has led them to lead heavy-duty transportation.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the emissions and performance of two dual-mode RCCI combustion strategies under the World Harmonized Vehicle Cycle (WHVC)

García

Monsalve‐Serrano

Roso

et al. 2017

Energy Conversion and Management

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This work compares the emissions and performance of two dual-mode reactivity controlled compression ignition (RCCI) combustion strategies under the World Harmonized Vehicle Cycle (WHVC), a chassis dynamometer version of the World Harmonized Transient Cycle (WHTC) test proposed by the EURO VI emission regulation for heavy-duty engines. The major difference between the two dual-mode combustion strategies investigated is that, while one of them relies on covering with conventional diesel combustion (CDC) the part of the map that cannot be covered by RCCI regime (RCCI/CDC dual-mode), the other does it relying on dual-fuel diffusion combustion (dualmode dual-fuel). The influence of the gear shifting strategy on the emissions and performance over the WHVC is discussed first. Later, both dual-mode concepts are compared considering the optimal gear shifting strategy. The results suggest that dual-mode dual-fuel concept allows reducing the specific fuel consumption by 7% in average versus RCCI/CDC concept. Moreover, NOx emissions are around 87% lower with dual-mode dual-fuel, meeting the EURO VI requirements without the need for an SCR aftertreatment system. In counterpart, HC and CO emissions are near 2 and 10 times greater, respectively, for dual-mode dual-fuel than for RCCI/CDC.

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Influence of fuel properties on fundamental spray characteristics and soot emissions using different tailor-made fuels from biomass

Cited by 48 publications

References 35 publications

Flame Front and Burned Gas Characteristics for Different Split Injection Ratios and Phasing in an Optical GDI Engine

Flame Front and Burned Gas Characteristics for Different Split Injection Ratios and Phasing in an Optical GDI Engine

Impact of diesel pilot distribution on the ignition process of a dual fuel medium speed marine engine

Evaluating the emissions and performance of two dual-mode RCCI combustion strategies under the World Harmonized Vehicle Cycle (WHVC)

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