Partially Homogenous Charge Compression Ignition Engine Development for Low Volatility Fuels

Singh, Akhilendra Pratap; Ágarwal, Avinash Kumar

doi:10.1021/acs.energyfuels.6b02832

Cited by 18 publications

(5 citation statements)

References 38 publications

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“…It is probably because EGR diluted the oxygen entering the cylinder and prolonged the ID period, thereby compressing the combustion time, which resulted in high EGT [38]. This performance is slightly different from that observed in other studies [35,39]. It was found that EGT decreased with the growth of EGR rate, mainly because EGR reduced the temperature in the cylinder.…”

Section: Engine Performancecontrasting

confidence: 62%

NOx–Smoke Trade-off Characteristics in a Palm Oil-Fueled CRDI Diesel Engine under Various Injection Pressures and EGR Rates

Kim

et al. 2022

Applied Sciences

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Palm oil is one of the most common and productive vegetable oils, so it is often used as an excellent feedstock for biodiesel production. However, due to the high viscosity and other issues of palm oil, it cannot be directly used as an alternative fuel for diesel engines unless some treatment is carried out. In this study, the effects of palm oil-diesel blend fuel on the nitrogen oxides (NOx)–smoke trade-off characteristics were investigated in a common rail direct injection (CRDI) diesel engine under various injection pressures and exhaust gas recirculation (EGR) rates. It was found that NOx and smoke from the combustion of fuel containing 50% palm oil (P50D50) were simultaneously suppressed by 3% and 3.1% compared with diesel fuel at an injection pressure of 400 bar, respectively. The performance of P50D50 was comparable to that of diesel, but at high injection pressure and high EGR rate, it showed shorter ignition delay (ID) and lower smoke emission.

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Section: Engine Performancecontrasting

confidence: 62%

NOx–Smoke Trade-off Characteristics in a Palm Oil-Fueled CRDI Diesel Engine under Various Injection Pressures and EGR Rates

Kim

et al. 2022

Applied Sciences

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“…Wu et al [18] designed a variable cross-section dual-channel chamber and optimized the swirl rate, fuel consumption rate, and emission performance in a single-cylinder diesel engine. Singh et al [19] conducted experiments on a two-cylinder diesel engine to explore the feasibility of lowtemperature combustion, where the combustion phasing is an important parameter in the combustion process. Ni et al [20] conducted an external characteristic experiment on a two-cylinder diesel engine, and found that Brake Specific Fuel Consumption (BSFC) could be significantly reduced by about 6% by improving the combustion chamber.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Combustion Performance of a Non-road Air-Cooled Two-Cylinder Turbocharged Diesel Engine

Yao,

Dong,

et al. 2024

Preprint

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Relying on the advantages of small size, simple structure, low cost and weight, air-cooled two-cylinder turbocharged diesel engines have been widely used in generator sets. However, there is still a lack of systematic study on the combustion characteristics of small air-cooled diesel engines. This paper presented a quantitative study on the combustion performance of a non-road air-cooled two-cylinder turbocharged diesel engine by both simulation and experiment. The results show that the increase of intake air temperature can delay the combustion center of gravity, and improve the combustion performance and the sustainability of diesel engines. The decrease of intake air pressure will lead to a reduction in oxygen amount during the combustion process, thus causing a deterioration of cylinder pressure and combustion performance. By modifying the combustion chamber, the ignition delay and combustion duration are each extended by 1.6 degrees and 4.2 degrees under 100% engine load. The ignition delay and combustion duration are not obviously affected by modifying the combustion chamber shape under 25% and 50% loads. By increasing the compression ratio from 19.5 to 20.5, the ignition delay and combustion duration are shortened, which could enhance the cylinder pressure and heat release rate. However, reducing the compression ratio from 19.5 to 18.5 could significantly decrease the heat release rate. Under middle and low loads, combustion duration is less affected by injection timing. Under 100% load, the peak cylinder pressure increases to 11.4 MPa, and the ignition delay is shortened by advancing injection timing from -17°CA to -20°CA. The findings of this study have the potential to offer new insights for promoting the sustainable development of diesel engines used in generator sets.

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Section: Introductionmentioning

confidence: 99%

“…10 In order to further reduce engine-out soot, several strategies, such as exhaust gas recirculation (EGR) and partially premixed charge compression ignition, are adopted to advanced diesel engines. [11][12][13][14] With one method for advanced combustion strategies, irregular shapes of the piston bowl have been developed to improve the quality of air-fuel mixing through the swirl and subsequently optimize combustion. 15 However, spray impingement tends to occur in compact-size engines with irregular shapes of the piston bowl.…”

Section: Introductionmentioning

confidence: 99%

Assessment of impinged flame structure in high-pressure direct diesel injection

Zhao

Zhu

Naber

et al. 2019

International Journal of Engine Research

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Spray impingement often occurs during cold-start in direct-injection diesel engines, affecting the subsequent combustion process by altering the local flow condition. This work has investigated the impinged flame structure by examining local expansion distance and planar curvature of the boundary in details. The experiments were carried out in a constant volume combustion chamber. The injection pressure and ambient density were varied from 120 to 180 MPa and 14.8 to 30.0 kg/m3 under non-vaporizing conditions, respectively. For reacting conditions, the injection pressure and ambient density were fixed at 150 MPa and 22.8 kg/m3 but with different ambient temperatures from 800 to 1000 K. Unlike orthogonal spray impingement, the profile of expansion distance along the radial direction at the 60° impinging angle is non-uniform but the profile is comparable between the non-vaporizing and reacting conditions under the same injection pressure and ambient density. With the help of Intensity-aXial-Time method, the most intensive soot luminosity region and Mie scattering intensity region are identified and the region has been found to be along the impinged spray axial direction. Outmost boundary of an impinged flame is found to have wrinkles attributed to air entrainment. The temporal level of flame wrinkles is higher in reacting conditions than in non-vaporizing conditions. The scatter distribution of the boundary curvature and near-field soot formation illustrates an inverted “S” shape correlation with time. High flame luminosity is found to be formed in concave regions while less soot is formed in convex regions. This inverted S-shape is a new finding of the state relationship at the solid–liquid–gas impinged flame propagation. Finally, heat flux measurement through the plate is examined.

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Partially Homogenous Charge Compression Ignition Engine Development for Low Volatility Fuels

Cited by 18 publications

References 38 publications

NOx–Smoke Trade-off Characteristics in a Palm Oil-Fueled CRDI Diesel Engine under Various Injection Pressures and EGR Rates

NOx–Smoke Trade-off Characteristics in a Palm Oil-Fueled CRDI Diesel Engine under Various Injection Pressures and EGR Rates

Exploring the Combustion Performance of a Non-road Air-Cooled Two-Cylinder Turbocharged Diesel Engine

Assessment of impinged flame structure in high-pressure direct diesel injection

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