Effect of gasoline aromatic compositions coupled with single and double injection strategy on GDI engine combustion and emissions

Zhang, Wenbin; Ma, Xiao; Shuai, Shijin; Wu, Kaihua; Macias, James; Shen, Yuehai; Yang, Chen; Guan, Li

doi:10.1016/j.fuel.2020.118308

Cited by 24 publications

(9 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is known that heavy aromatics (>C 9 ) favor the particulate formation, resulting in higher total particulate emissions [29][30][31][32]. Despite the fact that the aromatic content of the bioliq ® 2019 fuel has not decreased compared to the bioliq ® 2017 fuel, the aromatics are smaller than C 9 , and thus improve the particulate emissions, which is also shown by [33]. In addition, [33] remarks that the aromatic size has a stronger influence than the total aromatics content on the particulate emissions.…”

Section: Particulate Emissionsmentioning

confidence: 94%

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

Michler

Niethammer

Fuchs

et al. 2023

Fuels

View full text Add to dashboard Cite

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.

show abstract

Section: Particulate Emissionsmentioning

confidence: 94%

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

Michler

Niethammer

Fuchs

et al. 2023

Fuels

View full text Add to dashboard Cite

show abstract

“…Jiao and Reitz 30 evaluated the effect of injection timing on soot distribution, particle size, and number density, using the CFD simulation. Zhang et al 31 analyzed how the multiple injection strategies and injection timing impact the emissions of the GDI engine. Jiang et al 32 showed that using lower injection pressure and delayed injection time, GDI can obtain lower CO and UHC.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the effect of injection timing on the in-cylinder activity of a gasoline direct injection engine

Zhang

Wang

Yang

et al. 2022

Advances in Mechanical Engineering

View full text Add to dashboard Cite

GDI (Gasoline direct injection) technology is used in downsized engines for its economy and low emissions. However, if the injection strategy is not set properly, GDI will produce more emissions than conventional gasoline engines. In this paper, the effect of injection timing on GDI engine emissions under optimal phasing conditions was analyzed by using a three-dimensional (3D) computational fluid dynamics (CFD) GDI engine numerical model. The results showed that at medium engine speed and medium load advancing the injection timing from −300 to −290 CAD ATDC resulted in a more efficient and cleaner combustion process, as evidenced by the higher power output, the increased thermal and combustion efficiencies, and the reduced CO, UHC, soot emissions. The raised NOx emissions at advanced injection timing operation corresponded to the high combustion quality. There was a trade-off relation for advancing injection timing strategy. Specifically, an advanced injection timing operation would increase the amount of liquid film formed on the piston and liner, which is not favorable to clean combustion. However, advancing injection timing also provides more time for fuel-air mixing, which is beneficial for the formation of a more homogeneous mixture. The numerical simulations suggested that the advantages of earlier injection timing outweighed the disadvantages and improved engine efficiency, at least for the conditions and the engine investigated here. Moreover, the comparison indicated that changing injection timing also altered the chemical reaction pathways for pollutant species formation. Overall, all of these findings demonstrated that more fundamental work is still needed to understand the effect of injection timing on engine performance.

show abstract

“…Among internal combustion engines, gasoline direct injection (GDI) engines have the advantages of fuel economy, transient response, and precise air-fuel ratio control 6,7 . Thus, many studies have been focused on improving engine efficiency and reducing the exhaust emissions of GDI engines [8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Intake Manifold Geometry on Cylinder-to-Cylinder Variation and Tumble Enhancement in Gasoline Direct Injection Engine

Shin

Kim

Son

et al. 2022

Preprint

View full text Add to dashboard Cite

In order to improve the performance of the gasoline direct injection engine system, it is fundamentally important to reduce the cylinder-to-cylinder variation which affected by the intake manifold geometry. Furthermore, the early tumble development which influences the characteristics of the mixture as followed by the atomization and evaporation of the fuel, also greatly affects engine performance. Thus, in this study, the cylinder-to-cylinder variation in volumetric efficiency and tumble for two different type of intake manifold (curved type and straight type) was investigated using computational fluid dynamic program, CONVERE v2.4. And influence of the intake manifold curve radius to the early flow intensity and tumble development was analyzed. As a result, it was advantageous for cylinder-to-cylinder variation in the straight intake manifold compared to the curved intake manifold. When the intake manifold curve radius was increased in the straight intake manifold, it was effective in strengthening the early flow and tumble intensity. At 3000 rpm, the distance from the intake manifold inlet to the port also had an effect. Therefore, it is possible to improve the intake manifold performance by increasing the intake manifold curve radius and adapting turbocharging at engine speeds above 3000 rpm.

show abstract

Effect of gasoline aromatic compositions coupled with single and double injection strategy on GDI engine combustion and emissions

Cited by 24 publications

References 48 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

Numerical investigation of the effect of injection timing on the in-cylinder activity of a gasoline direct injection engine

Effect of Intake Manifold Geometry on Cylinder-to-Cylinder Variation and Tumble Enhancement in Gasoline Direct Injection Engine

Contact Info

Product

Resources

About