Effects of pilot diesel injection strategies on combustion and emission characteristics of dual-fuel engines at part load conditions

Mousavi, Seyed Mohammad; Saray, Rahim Khoshbakhti; Bahlouli, Keyvan; Poorghasemi, Kamran; Maghbouli, Amin; Sadeghlu, Alireza

doi:10.1016/j.fuel.2019.116153

Cited by 26 publications

(6 citation statements)

References 30 publications

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“…The authors analyzed the effect of multiple injections on combustion and performance characteristics such as ICP, HRR, indicated power, and specific fuel consumption during the study. Mousavi et al 19 and Kesharwani and Gupta 20 evaluate the combustion and emission attributes for different split injection strategies. The result shows that a small amount of pilot injection increases the fuel-air mixing rate and decreases the delay period at the main injection period.…”

Section: Introductionmentioning

confidence: 99%

Effect of injection system parameters on overall performance of a small diesel engine

Dond¹,

Gulhane²

2021

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Limited fuel capacity and pollution are major concerns in the automobile industry. The combustion, performance, and emission characteristics are important considering the engine's overall performance. In the present paper, an experimental investigation was carried out on a small diesel engine to analyze the effect of injection system parameters on all measurable characteristics. The conventional diesel engine injection system was retrofitted with a common rail diesel injection (CRDI) system. The injection system parameters such as injection pressure, start of pilot injection timing, the start of main injection timing, and quantity of fuel injection percentage during the pilot and the main injection period were considered in the study. With the use of the CRDI system, it was observed that mean effective pressure and cylinder pressure were increased compared to the conventional diesel engine. There was a decrease in the peak value of the HRR and RoPR curve and simultaneously an increase in the width of the curve. MGT inside the combustion cylinder was also decreased. The retrofitted CRDI system shows higher thermal efficiency with good fuel economy as well as found a considerable reduction in carbon monoxide (CO) and smoke percentage. Overall, the considered injection system parameters deliver a significant improvement to the overall attributes of the small diesel engine.

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Section: Introductionmentioning

confidence: 99%

Effect of injection system parameters on overall performance of a small diesel engine

Dond¹,

Gulhane²

2021

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“…Compression ignition (CI) engines attract more attention because of lower fuel consumption, higher output power, and higher torque in comparison with spark ignition (SI) engines. 3 To be more specific, diesel direct injection (DI) into a high pressure and temperature combustion chamber (compression ratio usually from 15:1 to 24:1) makes it possible to reach high thermal efficiency. As compression ratio increases, the thermal efficiency rises consequently.…”

Section: Introductionmentioning

confidence: 99%

“…The results of this study show that TSC combustion mode is more capable in reducing the NO x and soot emissions especially at high engine load conditions. Mousavi et al 3 have investigated the effects of diesel injection parameters on a NG/diesel dual-fuel engine at part load conditions. They have found that by advancing the single injection timing from 217 to 270 ATDC, CO and UHC emissions decrease considerably.…”

Section: Introductionmentioning

confidence: 99%

Statistical analysis on the effect of premixed ratio, EGR, and diesel fuel injection parameters on the performance and emissions of a NG/Diesel RCCI engine using a DOE method

Poorghasemi

Saray

Ansari

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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In reactivity-controlled compression ignition (RCCI) engines, the ignition and combustion of premixed low reactive fuel (LRF) such as natural gas (NG) is controlled by the injection of high reactive fuel (HRF) such as diesel fuel during the compression stroke. In this study, the effects of six different input parameters on the performance and emissions of the natural gas/diesel fueled RCCI engine are studied using fractional factorial design (FFD) method, which is one of the design of experiment (DOE) methods. In this method, the effects of the interactions of input parameters, referred to as “factors,” on the outputs, referred to as “responses,” are investigated. The factors include premixed ratio (PR), start of first injection (SOI1), spray angle (SA), exhaust gas recirculation (EGR), start of second injection (SOI2), and mass fraction of first injection. Sixteen runs were conducted to evaluate the effects of the interaction between input factors on performance and emissions of a RCCI engine using a validated computational fluid dynamics (CFD) model. DOE results indicate that in order to increase gross indicated efficiency (GIE), higher premixed ratio, 85%, with wider spray angle, 150°, is an effective way. Meanwhile, carbon monoxide (CO) and unburned hydrocarbons (UHC) emissions as well as ringing intensity (RI) are decreased at this condition. To reduce NOx emissions, it is beneficial to raise premixed ratio from 55% to 85% or to use 40% EGR, independently.

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“…9 Hence, many researchers split the fuel injection quantity with an appropriate interval between the two injections. Mousavi et al 10 and Kesharwani et al 11 evaluated the combustion and emission attributes for different split injection strategies. Results show that a small amount of pilot injection increases the fuel-air mixing rate and decreases the delay period at the main injection period.…”

Section: Introductionmentioning

confidence: 99%

Effect of a turbocharger and EGR on the performance and emission characteristics of a CRDI small diesel engine

Dond¹,

Gulhane²

2021

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Limited fuel capacity and pollution are major concerns in the automobile industry. Methods to tackle these issues are continuously being investigated. The present work represents the experimental evaluation of a turbocharger and exhaust gas recirculation's (EGR's) combined effect on the common rail direct injection (CRDI) small diesel engine's performance and emission attributes. The fuel handling CRDI system variables, such as injection pressure, split injection timing, and fuel injection quantity along with EGR and turbocharger technology were considered for the study. Experiments were conducted with and without EGR and turbocharger conditions. Efforts are made to correlate the performance and emission characteristics with and without EGR and turbochargers. A combination of turbocharger and EGR shows much more lowering in nitrogen oxides, carbon monoxide, and hydrocarbon emission at the cost of a slight rise in smoke percentage. The thermal efficiency and fuel economy of the engine show a significant improvement for the turbocharger system. Overall, turbocharger and EGR combinations positively impact the engine

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Effects of pilot diesel injection strategies on combustion and emission characteristics of dual-fuel engines at part load conditions

Cited by 26 publications

References 30 publications

Effect of injection system parameters on overall performance of a small diesel engine

Effect of injection system parameters on overall performance of a small diesel engine

Statistical analysis on the effect of premixed ratio, EGR, and diesel fuel injection parameters on the performance and emissions of a NG/Diesel RCCI engine using a DOE method

Effect of a turbocharger and EGR on the performance and emission characteristics of a CRDI small diesel engine

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