Effects of Injection Timings and Intake Port Flow Control on the In-Cylinder Wetted Fuel Footprints during PFI Engine Startup Process

Kim, Hoisan; Yoon, Sun Jung; Xie, Xuan; Lai, Ming‐Chia; Quelhas, Sergio; Boyd, R.M.; Kumar, Naresh; Moran, Carilee

doi:10.4271/2005-01-2082

Cited by 8 publications

(5 citation statements)

References 19 publications

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“…In the case of port injection, closed valve injection is better than open valve injection, since it utilizes the valve heat to vaporize the fuel easily. This also reduces HC emissions . Thus, the closed valve injection strategy was followed in this experimental study.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of hydrous ethanol gasoline blend (E10) in a four stroke port fuel-injected spark ignition engine

Venugopal

Sharma

Satapathy

et al. 2012

Int. J. Energy Res.

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SUMMARY Performance, emissions and combustion characteristics of a port‐injected engine fuelled with hydrous ethanol gasoline blend (E10 ‐ 10% of hydrous ethanol by volume in gasoline) were compared with gasoline operation. Hydrous ethanol blend produced higher power output with lean mixtures at part throttle condition. Higher flame velocity and wider flammability limits of the blend resulted in lower cycle‐by‐cycle variations in indicated mean effective pressure as compared to gasoline. Hydro carbon emission was also lower due to the oxygen available in the fuel (E10), which enhanced the combustion rate. Higher latent heat of evaporation of the ethanol blend and water present in it resulted in lower in‐cylinder temperature, which in turn led to lesser NOx emissions. Thermal efficiency with the blend was higher in the leaner operating conditions than gasoline. Not much difference in performance, emission and combustion characteristics between neat gasoline and E10 were observed at full throttle operation. On the whole, hydrous ethanol blends can be used as a fuel with good performance and low emissions at part load condition. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Experimental study of hydrous ethanol gasoline blend (E10) in a four stroke port fuel-injected spark ignition engine

Venugopal

Sharma

Satapathy

et al. 2012

Int. J. Energy Res.

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“…When ethanol is injected at 540°bTDC, the injection sequence takes place while the intake valves are closed. This injection strategy is denoted as closed valve injection (CVI) [23]. On the other hand, ethanol is injected while the intake valves are open when the injection timing is set at 305°bTDC and 270°bTDC.…”

Section: Experimental Conditionsmentioning

confidence: 99%

A study on the combustion and emission characteristics of an SI engine under full load conditions with ethanol port injection and gasoline direct injection

Kim

Cho

Min

2015

Fuel

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“…The fuel droplets cannot evaporate in the first cycle of engine start-up because of the cold intake manifold. Mixture formation gets better when turbulence is created in the intake manifold [8].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Injection Parameters on Fuel Consumption and Emissions in A PFI Small Spark Ignition Engine

Demirci

Doğan

Cihan

et al. 2021

International Journal of Automotive Science and Technology

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Mixture formation in port fuel spark ignition engines is one of the most im-portant parameters, which affect combustion and emissions. In this study, the ef-fects of different injection start timings and some other port fuel injection (PFI) parameters on the performance and emissions of a water cooled and single cylin-der spark ignition engine were examined experimentally. The experiments were performed at different engine speeds (1200 and 1500 rpm for effect of injection pressure and 1500 rpm for changing injection timings) and different engine loads (3 bar and 5 bar for injection pressure and 1 bar and 5 bar for start of injection). The start of injection was chosen according to intake pressure measurements. The experiment results showed that brake specific fuel consumption (BSFC) and total hydrocarbon (THC) emissions are increased by the increase of the injection pressure. Because with the increase of injection pressure, the fuel can reach the intake manifold wall or intake valve. Therefore, the fuel enters the cylinder as a droplet. Different start of injection experiments showed that injection times have an effect on emissions and performance. The minimum brake specific fuel con-sumption and THC values were obtained at -243 °CA value of injection start. The twice injection in one cycle increased brake specific fuel consumption and THC emissions.

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Effects of Injection Timings and Intake Port Flow Control on the In-Cylinder Wetted Fuel Footprints during PFI Engine Startup Process

Cited by 8 publications

References 19 publications

Experimental study of hydrous ethanol gasoline blend (E10) in a four stroke port fuel-injected spark ignition engine

Experimental study of hydrous ethanol gasoline blend (E10) in a four stroke port fuel-injected spark ignition engine

A study on the combustion and emission characteristics of an SI engine under full load conditions with ethanol port injection and gasoline direct injection

The Effect of Injection Parameters on Fuel Consumption and Emissions in A PFI Small Spark Ignition Engine

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