A Correlation Between Re-Defined Design Parameters and Flow Coefficients of SI Engine Intake Ports

Son, Jinwook; Lee, Sihun; Han, Bong-Hoon; Kim, Wootae

doi:10.4271/2004-01-0998

Cited by 14 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These analyses are based on dimensionless discharge and flow coefficients [14][15][16][17], that supply significant information on the fluid dynamic efficiency of engines during the intake and/or the exhaust processes. Furthermore, dimensionless coefficients provide practical advices to engine designers and tuners on the sizing and location of valves and ducts [13], and they represent a fundamental reference to develop and validate the CFD models that are adopted to simulate and optimize the modern engines [18].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Analysis of the Fluid Dynamic Efficiency of a Production Spark-Ignition Engine during the Intake and Exhaust Phase

Algieri

2011

ISRN Mechanical Engineering

View full text Add to dashboard Cite

The present work aims at analyzing the fluid dynamic efficiency of a four-stroke spark-ignition engine. Specifically, a production four-cylinder internal combustion engine has been investigated during the intake and exhaust phase. The experimental characterization has been carried out at the steady flow rig adopting the dimensionless flow and discharge coefficients. The analysis has highlighted the great influence of the valve lift on the volumetric efficiency of the intake and exhaust system. Furthermore, the global investigation has demonstrated that the throttle angle has a significant influence on the head permeability during the induction phase. Particularly, the throttling process effect increases with the valve lift. Finally, the work has shown that all experimental data can be correlated by a single curve if an opportune dimensionless plot is adopted.

show abstract

Section: Introductionmentioning

confidence: 99%

An Experimental Analysis of the Fluid Dynamic Efficiency of a Production Spark-Ignition Engine during the Intake and Exhaust Phase

Algieri

2011

ISRN Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…Averaged coefficients representing the blowdown path and the scavenging path are calculated from the measured coefficients for each cylinder and port and applied to the GT power model. The detailed methodology of steady-state engine port flow measurements can be found in the authors' previous study [28]. Figure 4 shows the GT power model for the DEP engine utilized for optimization of design parameters which will be discussed in the following subsections.…”

Section: Divided Exhaust Period Systemmentioning

confidence: 99%

Effect of Divided Exhaust Period in a High Efficiency TGDI Engine

Jung

Son

et al. 2021

Energies

View full text Add to dashboard Cite

The divided exhaust period (DEP) concept was applied to a high-efficiency gasoline engine and its impact on various engine performance aspects were investigated. To this end, key design parameters of DEP components were optimized through 1-D engine simulation. The designed DEP components were fabricated and experimental verification was performed through an engine dynamometer test. The developed DEP engine shows suitable performance for electrified vehicles, with a maximum thermal efficiency of 42.5% as well as a wide sweet spot area of efficiency over 40%. The improvement in thermal efficiency was mainly due to a reduction in pumping loss. Notably, the reduction in pumping loss was achieved under high exhaust gas recirculation (EGR) flow conditions, where further improvements in fuel consumption could be achieved through a synergistic combination of DEP implementation and high dilution combustion. Furthermore, a significantly improved catalyst light-off time, uncharacteristic in turbocharged engines, was confirmed through a simulated cold-start catalyst heating engine test.

show abstract

“…Tests and simulation methods were often used to study the flow field in the intake port and incylinder of diesel engines (Deqing et al, 2002, Micklow G J,et al,2007, Ma Hongwei,et al,2013, Wang Tianyou,et al,2008, Stiehl, R.,et al,2016.At the same time, the intake port design method of some non diesel engine was also studied (Yuguo, et al,2014, Thangavel et al, 2016 ,at last , the ports were optimized , Son, J. W.,et al,2004. Because the air flow in-cylinder was difficult to experiment research at the same time, the three-dimensional models of four different combined intake ports with spiral and tangential port were established.…”

Section: Introductionmentioning

confidence: 99%

Flow Field Influence Analysis of Combination Intake Port to Port and In-Cylinder for a Four-Valve Diesel Engine

Jia

Deng

Wang³

et al. 2019

JAFM

View full text Add to dashboard Cite

Intake port structure directly affects the flow characteristics and combustion process of diesel engine, and then affects the comprehensive performance of diesel engine. To the intake ports of a four-valve direct injection diesel engine, the flow characteristics are analyzed on the four combined intake ports : (1) helical (left) and tangential (right), (2) tangential (left) and helical (right); (3) helical (left) and helical (right); and (4) tangential (left) and tangential (right).And the influence of air flow in four combined intake ports to incylinder gas flow is also analyzed. Results show that the helical and tangential combination intake ports flow velocity increases with the valve lift increases, and small turbulence arises at the valve guide lug, and the intake flow velocity of the minimum cross-section of the junction of the guiding section and the helical section is the maximum. The air flow in-cylinder moves from top cylinder head bottom to the cylinder bottom, the air flow is enlarged gradually by the small-scale irregular swirl, which eventually converges to a single swirl. The turbulence kinetic energy is very big when the air is just entering the cylinder, the flow space expands rapidly, and the dissipation of turbulent kinetic energy is very significant with the gas moves to the bottom of the cylinder.

show abstract

A Correlation Between Re-Defined Design Parameters and Flow Coefficients of SI Engine Intake Ports

Cited by 14 publications

References 4 publications

An Experimental Analysis of the Fluid Dynamic Efficiency of a Production Spark-Ignition Engine during the Intake and Exhaust Phase

An Experimental Analysis of the Fluid Dynamic Efficiency of a Production Spark-Ignition Engine during the Intake and Exhaust Phase

Effect of Divided Exhaust Period in a High Efficiency TGDI Engine

Flow Field Influence Analysis of Combination Intake Port to Port and In-Cylinder for a Four-Valve Diesel Engine

Contact Info

Product

Resources

About