Effect of Injection Parameters: Injection Timing and Injection Pressure on the Performance, Emission and Combustion Characteristics of CRDI Diesel Engine Operate with Palm Oil Methyl Ester (POME)

Blending diesel with biofuels, such as ethanol and palm oil methyl ester (PME), enhances the fuel properties and produces improved engine performance and low emissions. However, the presence of ethanol, which has a small cetane number and low heating value, reduces the fuel ignitability. This work aimed to study the effect of injection strategies, compression ratio (CR), and air intake temperature (Ti) modification on blend ignitability, combustion characteristics, and emissions. Moreover, the best composition of diesel–ethanol–PME blends and engine modification was selected. A simulation was also conducted using Converge CFD software based on a single-cylinder direct injection compression ignition Yanmar TF90 engine parameter. Diesel–ethanol–PME blends that consist of 10% ethanol with 40% PME (D50E10B40), D50E25B25, and D50E40B10 were selected and conducted on different injection strategies, compression ratios, and intake temperatures. The results show that shortening the injection duration and increasing the injected mass has no significant effect on ignition. Meanwhile, advancing the injection timing improves the ignitability but with weak ignition energy. Therefore, increasing the compression ratio and ambient temperature helps ignite the non-combustible blends due to the high temperature and pressure. This modification allowed the mixture to ignite with a minimum CR of 20 and Ti of 350 K. Thus, blending high ethanol contents in a diesel engine can be applied by advancing the injection, increasing the CR, and increasing the ambient temperature. From the emission comparison, the most suitable mixtures that can be operated in the engine without modification is D50E25B25, and the most appropriate modification on the engine is by increasing the ambient temperature at 350 K.

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The Effects of Injection Parameters on the Performance of Common Rail Light Duty Engine Fueled with Palm Oil Biodiesel

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.465-466.322 ◽

2013 ◽

Vol 465-466 ◽

pp. 322-326 ◽

Cited By ~ 2

Author(s):

M. Adlan Abdullah ◽

Farid Nasir Ani ◽

Masjuki Hassan

Keyword(s):

Diesel Engine ◽

Palm Oil ◽

Fuel Economy ◽

Fuel Injection ◽

Control Strategies ◽

Engine Performance ◽

Common Rail ◽

Injection Timing ◽

Injection Duration ◽

Injection Parameters

It is in the interest of proponents of biodiesel to increase the utilization of the renewable fuel. The similarities of the methyl ester properties to diesel fuel and its miscibility proved to be an attractive advantage. It is however generally accepted that there are some performance and emissions deficit when a diesel engine is operated with biodiesel. There are research efforts to improve the diesel engine design to optimize the combustion with biodiesel. Since the common rail engines operates on flexible injection strategies, there exist an opportunity to improve engine performance and offset the fuel economy deficit by means of optimizing the engine control strategies. This approach may prove to be more practical and easily implemented. This study investigated the effects of the fuel injection parameters - rail pressure, injection duration and injection timing - on a common rail passenger car engine in terms of the fuel economy. Palm oil based biodiesel up to 30% blend in diesel was used in this study. The end of injection, (EOI), was found to be the most important parameter for affecting fuel consumption and thermal efficiency.

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809 Combustion Characteristics of a Dual Fuel Diesel Engine with Palm Oil Methyl Ester /1-ButanoI Blend

The Proceedings of Conference of Kyushu Branch ◽

10.1299/jsmekyushu.2013.66.251 ◽

2013 ◽

Vol 2013.66 (0) ◽

pp. 251-252

Author(s):

Ryuki YOSHIMOTO ◽

Eiji KONOSHITA ◽

Yasufumi YOSHIMOTO ◽

Takeshi OTAKA

Keyword(s):

Diesel Engine ◽

Methyl Ester ◽

Palm Oil ◽

Combustion Characteristics ◽

Dual Fuel

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Effect of Compression Ratio on the Performance Characteristics of a Palm Oil Methyl Ester Run Diesel Engine

Volume 4: Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy, Parts A and B ◽

10.1115/imece2011-65135 ◽

2011 ◽

Cited By ~ 1

Author(s):

Biplab K. Debnath ◽

Ujjwal K. Saha ◽

Niranjan Sahoo

Keyword(s):

Diesel Engine ◽

Methyl Ester ◽

Palm Oil ◽

Compression Ratio ◽

Cetane Number ◽

Calorific Value ◽

Injection Timing ◽

Oxides Of Nitrogen ◽

Promising Alternative ◽

Standard Design

Palm Oil Methyl Ester (POME) is a very promising alternative renewable biofuel. This is because it has a better cetane number and a comparable lower calorific value with respect to its competitors. However, due to difference in molecular composition and hence dissimilar properties, it does not perform proficiently in diesel engine with standard design and operating parameters. Therefore, a study is arranged to realize the effect of compression ratio variation on POME run in diesel engine. The load is varied from ‘no load’ to ‘full load’ with six equal intervals. During this study, standard diesel injection timing is maintained unaffected. The study conveys that at higher compression ratio, POME causes reduction in brake fuel consumption and thereby increases the engine efficiency. The increase in compression ratio also causes smoother combustion, lower ignition delay with early heat release than diesel operation. The detrimental emission quantities in the form of carbon monoxide, oxides of nitrogen and hydrocarbon emissions are also cut down with presence of POME in the diesel engine at high compression ratio. Thus, POME can be regarded as a good alternative fuel for diesel engine for locomotive applications.

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Effect of Injection Parameters and Strategy on the Noise From a Single Cylinder Direct Injection Diesel Engine

ASME 2011 Internal Combustion Engine Division Fall Technical Conference ◽

10.1115/icef2011-60148 ◽

2011 ◽

Author(s):

Sukhbir Singh Khaira ◽

Amandeep Singh ◽

Marcis Jansons

Keyword(s):

Diesel Engine ◽

Direct Injection ◽

Injection Pressure ◽

Combustion Noise ◽

Injection Timing ◽

Cylinder Pressure ◽

Frequency Spectra ◽

Single Cylinder ◽

Direct Injection Diesel Engine ◽

Injection Parameters

Acoustic noise emitted by a diesel engine generally exceeds that produced by its spark-ignited equivalent and may hinder the acceptance of this more efficient engine type in the passenger car market (1). This work characterizes the combustion noise from a single-cylinder direct-injection diesel engine and examines the degree to which it may be minimized by optimal choice of injection parameters. The relative contribution of motoring, combustion and resonance components to overall engine noise are determined by decomposition of in-cylinder pressure traces over a range of load, injection pressure and start of injection. The frequency spectra of microphone signals recorded external to the engine are correlated with those of in-cylinder pressure traces. Short Time Fourier Transformation (STFT) is applied to cylinder pressure traces to reveal the occurrence of motoring, combustion noise and resonance in the frequency domain over the course of the engine cycle. Loudness is found to increase with enhanced resonance, in proportion to the rate of cylinder pressure rise and under conditions of high injection pressure, load and advanced injection timing.

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Assessment on the consequences of injection strategies on combustion process and particle size distributions in Euro VI medium-duty diesel engine

International Journal of Engine Research ◽

10.1177/1468087419865652 ◽

2019 ◽

Vol 21 (4) ◽

pp. 683-697 ◽

Cited By ~ 2

Author(s):

Vicente Bermúdez ◽

Antonio García ◽

David Villalta ◽

Lian Soto

Keyword(s):

Particle Size ◽

Diesel Engine ◽

Size Distribution ◽

Particle Concentration ◽

Combustion Process ◽

Injection Pressure ◽

Injection Timing ◽

Injection Parameters ◽

Main Injection ◽

Injection Strategies

Although there are already several works where the influence of injection parameters on exhaust emissions, and specifically on particulate matter emissions, in diesel engines has been evaluated, the diversity in the results that can be found in the literature indicates the need to carry out new experiments that can provide more information about the influence of these parameters on modern diesel engines. This study intends to be placed within this scientific framework, hence a parametric study was carried out based on the independent modification of the main injection timing and the injection pressure with respect to the nominal conditions of a new Euro VI direct injection diesel engine. Four steady-state operation points of the engine map were chosen: 25% load and 950 r/min, 50% load and 1500 r/min, 75% load and 2000 r/min and 100% load and 2200 r/min, where in each of these operation points, the variations of the injection parameters in the study on the combustion process and its consequent impact on the particle size distribution, including an analysis of the geometric mean diameter values, were evaluated. The results showed that the different injection strategies adopted, despite not significantly affecting the engine efficiency, did cause a significant impact on particle number emissions. At the low load operation, the size distribution showed a bimodal structure, and as the main injection timing was delayed and the injection pressure was decreased, the nucleation-mode particle concentration decreased, while the accumulation-mode particle concentration increased. In addition, at medium load, the nucleation-mode particle emission decreased considerably while the accumulation-mode particle emission increased, and this increase was much greater with the main injection timing delay and the injection pressure reduction. Similar behavior was observed at high load, but with a much more prominent pattern.

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