Experimental investigation on the effect of injector hole number on engine performance and particle number emissions in a light-duty diesel engine

Mohiuddin, Khawar; Kwon, Hee-Yong; Choi, Moon‐Hee; Park, Sungwook

doi:10.1177/1468087420934605

Cited by 14 publications

(10 citation statements)

References 35 publications

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“…(7) One effective method for obtaining a nonlinear algorithm to change the fuel injection advance angle is to correct the shape of the HPFP plunger's cut-off edge. (8) The modernization of the fuel system makes it possible to reduce specific fuel consumption by almost 3% and NOx emissions by almost 30% in comparison with a basic ICE.…”

Section: Discussionmentioning

confidence: 99%

“…For our purposes, the most relevant are (1) optimizing the fuel system's parameters (fuel supply method, injection pressure, fuel injection advance angle, etc.) [4][5][6]; (2) fine-tuning the design of the fuel injector and adjusting the time needed for fuel injection [7,8]; and (3) controlling the law of fuel supply during fuel supply [9]. Agarwal A. K. et al [4] examined the effect of different injection strategies (different initial pressures and the start of the fuel supply) on the efficiency and environmental parameters of a diesel engine.…”

Section: Introductionmentioning

confidence: 99%

“…The influence of these parameters on the performance of a diesel engine is shown. Mohiuddin K. et al [8] experimentally evaluated the effect of the number of holes in the nozzle and the injection time on the environmental performance of a diesel ICE. It should be noted that some data were obtained using optical research methods.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, these researchers developed a mathematical model that was able to predict the change in the degree of fuel atomization, pressure in the cylinder, the rate of heat release and the amount of emissions quite well. Many studies on improving the mixture formation and combustion have been performed using optical methods [8,[10][11][12]. Optical research methods have made it possible to visualize the fuel supply process while qualitatively and quantitatively assessing the influence of the fuel system parameters on the ICE's technical and economic indicators.…”

Section: Introductionmentioning

confidence: 99%

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Modernization of the Mechanical Fuel System of a Diesel Locomotive Engine through Physical and Numerical Modeling

Plotnikov

Grigoriev

2021

Energies

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Reducing harmful emissions from exhaust gases and increasing energy efficiency are urgent tasks when designing reciprocating internal combustion engines. In this experimental work, the fuel system of a diesel locomotive engine operating on the Miller cycle is improved. The purpose of the study is to improve the environmental and economic indicators of diesel engines at minimal financial cost. The article provides an overview of the main research on improving fuel supply, mixing and combustion. The features of engine operation are also briefly described. Numerical simulation of the diesel engine operating cycle was performed before the bench tests. The experiments were performed on a full-size diesel engine with a power of 1200 kW. The measuring equipment and experimental technique are described in the article. The technical solutions that made it possible to improve the fuel supply are described. A new design for the high-pressure fuel pump drive is proposed. The optimal fuel injection advance angles are determined. An original design for the fuel pump plunger was developed. The proposed technical solutions made it possible to reduce fuel consumption by up to 3% (from 217.8 to 211.4 g/kW·h) and NOx emissions two-fold (from 19.4 to 8.8 g/kW·h).

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modernization of the Mechanical Fuel System of a Diesel Locomotive Engine through Physical and Numerical Modeling

Plotnikov

Grigoriev

2021

Energies

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“…Prasetya et al 17 showed that the filament-like string cavitation occurs when strong vortex ring flow forms in the sac at low needle lift. Mohiuddin et al 18 showed that increasing hole number with decreasing orifice diameter had a positive effect on Soot-NOx and ISFC-NOx trade-off in a light-duty diesel engine.…”

Section: Introductionmentioning

confidence: 99%

Identification of significant design factors for diesel spray combustion control through comprehensive experiments with various multi-hole nozzle internal geometries

Watanabe

Kurimoto

Serizawa

et al. 2021

International Journal of Engine Research

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It is well known that nozzle internal geometries affect the characteristics of diesel spray and combustion. However, despite a number of studies, the effects are difficult to generalize. It is also not clear which spray features are more important for combustion than others. To investigate these subjects, a comprehensive dataset on diesel spray combustion was obtained with 20 variations of multi-hole injector nozzle. The 20 variations had different combinations of orifice diameter, orifice length, sac length and orifice hub-to-tip ratio, which cover the large range of existing production injectors. Vapor penetration, vapor width, ignition delay time, ignition distance and lift-off length were quantified using schlieren and excited-state hydroxyl radical (OH*) chemiluminescence imaging for an isolated plume emerging from these different nozzles. The experiments were conducted with Japanese diesel fuel in a constant-volume diesel spray combustion facility at Sandia National Laboratories. The results were analyzed with response surface and Lasso regression analysis to identify significant design factors for spray combustion. Orifice diameter has large effects on spray combustion. Orifice length, sac length, orifice hub-to-tip ratio and their interactions have effects on spray combustion, but each effect is smaller than the effect of orifice diameter. Vapor penetration is a significant design factor for ignition delay time, ignition distance and lift-off length, while vapor width is not. Lift-off length is well-explained by ignition distance and ignition delay time. Ignition distance should be taken into consideration as a significant design factor for lift-off length as well as ignition delay time.

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A numerical investigation of injector hole configuration and injection parameters in a dimethyl ether fueled DICI engine

Sahu

Tripathy

2022

Env Prog and Sustain Energy

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The lower calorific value of dimethyl ether (DME) is approximately 65% of that of diesel; therefore, a higher quantity of DME must be supplied per cycle to generate the same magnitude of power. A retrofitted DME-fueled engine generally uses a longer fuel injection duration to provide the excess fuel mass. The present work seeks to find the most appropriate way to increase the mass flow rate of a DME-fueled direct-injected compression ignition engine by varying the number of nozzle holes, nozzle hole diameter, and injection pressure. The results show that increasing mass flow rate increases peak combustion pressure and heat release rate but decreases combustion duration. Increasing the number of injector holes increases indicated specific fuel consumption (ISFC) and exhaust emissions (NOx, HC, and CO) due to mixing between unburned fuel spray and neighboring combustion products.Increasing the nozzle hole diameter or fuel injection pressure increases spray tip penetration and improves fuel-air mixing before combustion initiates. Increasing the nozzle hole diameter by merely 22 μm than the baseline injector reduces ISFC and exhaust emissions at a slightly retarded start of injection (SOI). However, the lowest ISFC was found at the 30 MPa injection pressure at the most advanced SOI, at the expense of higher NOx.

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Experimental investigation on the effect of injector hole number on engine performance and particle number emissions in a light-duty diesel engine

Cited by 14 publications

References 35 publications

Modernization of the Mechanical Fuel System of a Diesel Locomotive Engine through Physical and Numerical Modeling

Modernization of the Mechanical Fuel System of a Diesel Locomotive Engine through Physical and Numerical Modeling

Identification of significant design factors for diesel spray combustion control through comprehensive experiments with various multi-hole nozzle internal geometries

A numerical investigation of injector hole configuration and injection parameters in a dimethyl ether fueled DICI engine

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