GDI: Interaction Between Mixture Preparation, Combustion System and Injector Performance

Preussner, C.; Döring, C.; Fehler, S.; Kampmann, Stefan

doi:10.4271/980498

Cited by 60 publications

(30 citation statements)

References 6 publications

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“…Multihole injectors have been studied because of their potential for achieving good fuel stratification, thus extending the lean limit further (Preussner et al, 1998). They also offer the highest possible flexibility in adapting the spray pattern layout to a particular combustion chamber design.…”

Section: Introductionmentioning

confidence: 99%

Effects of intake flow on the spray structure of a multi-hole injector in a DISI engine

Kim

Nouri

Yan

et al. 2009

Int.J Automot. Technol.

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This is the accepted version of the paper.This version of the publication may differ from the final published version. ABSTRACT−The spray characteristics of a 6-hole injector were examined in a single cylinder optical direct injection spark ignition engine. The effects of injection timing, in-cylinder charge motion, fuel injection pressure, and coolant temperature were investigated using the 2-dimensional Mie scattering technique. It was confirmed that the incylinder charge motion played a major role in the fuel spray distribution during the induction stroke while injection timing had to be carefully considered at high injection pressures during the compression stroke to prevent spray impingement on the piston. Permanent

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Section: Introductionmentioning

confidence: 99%

Effects of intake flow on the spray structure of a multi-hole injector in a DISI engine

Kim

Nouri

Yan

et al. 2009

Int.J Automot. Technol.

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show abstract

“…The optic access was placed in one section of the piston head, being the most appropriate collation place due to the geometric characteristics of the model. In the same way as Preussner, laser induced fluorescence was used as the technique of measure, obtaining extremely satisfying results in addition to confirm (Preussner et al, 1998) theories, who postulated that the laser induced fluorescence technique was no the best option to study the combustion effects due to the problems generated to detect species. Something that does not exist in the case of vapour concentration studies, as long as the fuel is mixed with tracers to make it behave as a fluorescent source (the combustible by its own nature tends to illuminate when its subject to high pressure and temperature, which is why tracers are required to carry out concentration studies, because the presence of tracers allows to define the different wavelengths for each element that constitutes the mixture).…”

Section: According To the Geometry Of The Chambermentioning

confidence: 95%

“…With the purpose of visualizing the atomization process in a gasoline direct injection system, (Preussner et al, 1998) used a model pressurized with oxygen (pressure and temperature of 20 bar and 673 K correspondingly). Where the combustion products of each cycle were constantly evacuated by the use of nitrogen and the visualization of the atomization process was done through windows located on the far ends of the injection chamber.…”

Section: According To the Geometry Of The Chambermentioning

confidence: 99%

Experimental Cells for Research Diesel Sprays

Martínez-Martínez¹,

García-Yera²,

Bermúdez³

2010

Fuel Injection

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“…They also observed that the spray tip penetration and the spray width decreased under high ambient pressure conditions. Preussner et al [3] investigated the basic mechanisms of interaction between droplets and air over a hollow-cone fuel spray. In their study, after the primary breakup, momentum exchange between the droplets and air leads to a dynamic vacuum in the inner part of the cone.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study on hollow-cone fuel spray of highpressure swirl injector under high ambient pressure condition

2008

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A hybrid breakup model was proposed as a trustworthy prediction of hollow-cone fuel spray in the present study and the atomization process of the hollow-cone fuel spray of a high-pressure swirl injector in a Gasoline Direct Injection (GDI) engine under high ambient pressure conditions was studied by a new hybrid breakup model. The proposed hybrid breakup model is composed of the Linearized Instability Sheet Atomization (LISA) model as a primary breakup process. The Aerodynamically Progressed Taylor Analogy Breakup (APTAB) model, instead of the Taylor Analogy Breakup (TAB) model, was used as a secondary breakup process. The effects of the droplet deformation on a droplet aerodynamic external force are considered in the APTAB model. In addition, we replaced the 2x distribution function used in previous the APTAB model by the Rosin-Rammler distribution function to improve the prediction precision. The Laser Induced Exciplex Fluorescence (LIEF) technique and the Phase Doppler Anemometry (PDA) system were used to produce a set of experimental data for the model validation. The estimation of the prediction ability of the LISA+APTAB model was carried out, and spray characteristics, which are difficult to obtain by experimental method, were calculated and discussed. The suggested hybrid breakup model showed better prediction capability compared with the previous model (LISA+TAB model). From the calculated results, the effect of the ambient pressure on the SMD (Sauter Mean Diameter) and droplet velocity could be discussed quantitatively.

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GDI: Interaction Between Mixture Preparation, Combustion System and Injector Performance

Cited by 60 publications

References 6 publications

Effects of intake flow on the spray structure of a multi-hole injector in a DISI engine

Effects of intake flow on the spray structure of a multi-hole injector in a DISI engine

Experimental Cells for Research Diesel Sprays

Numerical and experimental study on hollow-cone fuel spray of highpressure swirl injector under high ambient pressure condition

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