scholarly journals Impact of diethyl ether in blends with diesel fuel on acceleration process of the diesel engine

2018 ◽  
Vol 19 (12) ◽  
pp. 411-414
Author(s):  
Wincenty Lotko ◽  
Krzysztof Górski ◽  
Jerzy Stobiecki
Keyword(s):  
Diesel Engine ◽  
Diethyl Ether ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Negative Impact ◽  
Chemical Properties ◽  
Diesel Oil ◽  
Injection System ◽  
Acceleration Process ◽  
Engine Fuel

The paper presents results of the crankshaft acceleration process of the diesel engine fuelled with diesel oil - diethyl ether blends. In particular mixtures of diesel fuel with addition of 5, 10, 15 and 20 % by volume were tested. Results confirmed that DEE addition has negative impact on acceleration process of the AD3.152 engine. However it should be pointed that tests were carried out for nominal settings of the engine fuel injection system. It means that these settings were not optimal for tested blends with different physico-chemical properties compared to regular diesel fuel.

A Survey of Analysis, Modeling, and Diagnostics of Diesel Fuel Injection Systems

2016 ◽  
Vol 138 (8) ◽  
Author(s):  
Tomi R. Krogerus ◽  
Mika P. Hyvönen ◽  
Kalevi J. Huhtala
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Power Plants ◽  
Fuel Injection ◽  
High Reliability ◽  
Injection System ◽  
Engine Fuel ◽  
Injection Equipment ◽  
Diesel Fuel Injection

Diesel engines are widely used due to their high reliability, high thermal efficiency, fuel availability, and low consumption. They are used to generate power, e.g., in passenger cars, ships, power plants, marine offshore platforms, and mining and construction machines. The engine is at heart of these applications, so keeping it in good working condition is vital. Recent technical and computational advances and environmental legislation have stimulated the development of more efficient and robust techniques for the diagnostics of diesel engines. The emphasis is on the diagnostics of faults under development and the causes of engine failure or reduced efficiency. Diesel engine fuel injection plays an important role in the development of the combustion in the engine cylinder. Arguably, the most influential component of the diesel engine is the fuel injection equipment; even minor faults can cause a major loss of efficiency of the combustion and an increase in engine emissions and noise. With increased sophistication (e.g., higher injection pressures) being required to meet continuously improving noise, exhaust smoke, and gaseous emission regulations, fuel injection equipment is becoming even more susceptible to failure. The injection systems have been shown to be the largest contributing factor in diesel engine failures. Extracting the health information of components in the fuel injection system is a very demanding task. Besides the very time-consuming nature of experimental investigations, direct measurements are also limited to selected observation points. Diesel engine faults normally do not occur in a short timeframe. The modeling of typical engine faults, particularly combustion related faults, in a controlled manner is thus vital for the development of diesel engine diagnostics and fault detection. Simulation models based on physical grounds can enlarge the number of studied variables and also obtain a better understanding of localized phenomena that affect the overall behavior of the system. This paper presents a survey of the analysis, modeling, and diagnostics of diesel fuel injection systems. Typical diesel fuel injection systems and their common faults are presented. The most relevant state of the art research articles on analysis and modeling of fluid injection systems as well as diagnostics techniques and measured signals describing the behavior of the system are reviewed and the results and findings are discussed. The increasing demand and effect of legislation related to diagnostics, especially on-board diagnostics (OBD), are discussed with reference to the future progress of this field.

scholarly journals The Influence of Diesel Oil Improvers on Indices of Atomisation and Combustion in High-Efficiency Engines

2017 ◽  
Vol 24 (3) ◽  
pp. 99-105 ◽  
Author(s):  
Ireneusz Pielecha ◽  
Jacek Pielecha ◽  
Maciej Skowron ◽  
Aleksander Mazanek
Keyword(s):  
Diesel Engine ◽  
Physicochemical Properties ◽  
Diesel Fuel ◽  
Liquid Fuel ◽  
High Efficiency ◽  
Fuel Injection ◽  
Diesel Oil ◽  
Fuel Combustion

Abstract The process of fuel combustion in a diesel engine is determined by factors existing during liquid fuel injection and atomisation. The physicochemical properties of the fuel to a large extent decide upon the quality of this phase of cylinder fuelling. So it is important to ensure appropriate properties of a fuel affecting its atomisation and, as a result, combustion. The paper deals with the topic of diesel oil improvers and the analysis of their influence on atomisation and combustion indices. In the studies base diesel oil and a diesel fuel improved by a package of additives, were used. The process of conventional and improved fuel injection was analysed by using optical examinations. The amount of released heat was evaluated during the studies carried out on combustion. Significant aspects of the applied improvers in relation to fuel injection and its combustion have been indicated.

scholarly journals A Study on Water-Induced Damage Severity on Diesel Engine Injection System Using Emulsified Diesel Fuels

Electronics ◽  
2021 ◽  
Vol 10 (18) ◽  
pp. 2285
Author(s):  
Min-Seop Kim ◽  
Ugochukwu Ejike Akpudo ◽  
Jang-Wook Hur
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Energy Demand ◽  
Fuel Injection ◽  
Nox Reduction ◽  
Cost Effective ◽  
Operating Conditions ◽  
Injection System ◽  
Diesel Fuels ◽  
Diesel Fuel Injection

Diesel engine emissions contribute nearly 30% of greenhouse effects and diverse health and environmental problems. Amidst these problems, it is estimated that there will be a 75% increase in energy demand for transportation by 2040, of which diesel fuel constitutes a major source of energy for transportation. Being a major source of air pollution, efforts are currently being made to curb the pollution spread. The use of water-in-diesel (W/D)-emulsified fuels comes as a readily available (and cost-effective) option with other benefits including engine thermal efficiency, reduced costs, and NOx reduction; nonetheless, the inherent effects—power loss, component wear, corrosion, etc. still pose strong concerns. This study investigates the behavior and damage severity of a common rail (CR) diesel fuel injection system using exploratory and statistical methods under different W/D emulsion conditions and engine speeds. Results reveal that the effect of W/D emulsion fuels on engine operating conditions are reflected in the CR, which provides a reliable avenue for condition monitoring. Also, the effect of W/D emulsion on injection system components-piston, nozzle needle, and ball seat–are presented alongside related discussions.

The Effects of Fuel Injection Pressure and Fuel Type on the Combustion Characteristics of a Diesel Engine

2014 ◽  
Author(s):  
Jim Cowart ◽  
Dianne Luning Prak ◽  
Len Hamilton
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Common Rail ◽  
Injection System ◽  
Fuel Type ◽  
Delay Times ◽  
Fuel Injection Pressure ◽  
Physical And Chemical

In an effort to understand the effects of injection system pressure on alternative fuel performance, a single cylinder diesel engine was outfit with a modern common rail fuel injection system and piezoelectric injector. As future new fuels will likely be used in both older mechanical injected engines as well as newer high pressure common rail engines, the question as to the sensitivity of a new fuel type across a range of engines is of concern. In this study conventional diesel fuel (Navy NATO F76) was compared with the new Navy HRD (Hydro-processed Renewable Diesel) fuel from algal sources, as well as the high cetane reference fuel nC16 (n-hexadecane CN=100). It was seen that in general, IGD (Ignition Delay) was shortened for all fuels with increasing fuel injection pressure, and was shortened with higher CN fuels. The combustion duration for all fuels was also significantly reduced with increasing fuel injection pressure, however, longer durations were seen for higher CN fuels at the same fuel pressure due to less pre-mixing before the start of combustion. Companion modeling using the LLNL (Lawrence Livermore National Lab) heavy hydro-carbon and diesel PRF chemical kinetic mechanisms for HRD and nC16 was applied to understand the relative importance of the physical and chemical delay periods of the IGD. It was seen that at low fuel injection pressures, the physical and chemical delay times are of comparable duration. However, as injection pressure increases the importance of the chemical delay times increases significantly (longer), especially with the lower CN fuel.

Performance Improvement of a HFO Fuelled Medium-Speed Diesel Engine

2011 ◽  
Vol 148-149 ◽  
pp. 1504-1509
Author(s):  
Li Yan Feng ◽  
Bao Guo Du ◽  
Jia Xing Li ◽  
Xin Liu
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Fuel Economy ◽  
Fuel Injection ◽  
Fuel Oil ◽  
Injection System ◽  
Fuel Injection System ◽  
Heavy Fuel Oil ◽  
Cycle Simulation ◽  
Medium Speed

This paper presents the endeavor to use Heavy Fuel Oil on a medium-speed diesel engine. The researched engine is a locomotive diesel engine, which used to be only fuelled with light diesel fuel. Since the fuel injection system of the original engine is unfit for HFO, the authors reformed the fuel injection system to meet the requirements of using HFO. In order to decrease the viscosity of the fuel, light diesel fuel was blended with HFO and heating apparatus was applied. A serial of experiments were carried out to check the performance of the reformed engine. Meanwhile, 1-D engine working cycle simulation tool was employed to study the fuel economy and combustion performance of the engine. The results indicate that compared with using light diesel fuel, when using HFO, the engine’s power performance was maintained, and the brake specific fuel consumption was increased. But considering lower price of heavy fuel oil, the fuel economy was greatly improved.

scholarly journals Design adaptation of the automobile and tractor diesel engine for work on mixed vegetable-mineral fuel

2020 ◽  
Vol 17 ◽  
pp. 00077 ◽  
Author(s):  
Alexei Khokhlov ◽  
Anton Khokhlov ◽  
Dmitry Maryin ◽  
Denis Molochnikov ◽  
Ilnar Gayaziev
Keyword(s):  
Diesel Engine ◽  
Vegetable Oil ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Electronic Control Unit ◽  
Carbon Oxide ◽  
Partial Substitution ◽  
Engine Fuel ◽  
Camelina Oil ◽  
Injection Pump

The article is devoted to the solution of the problem associated with the partial substitution of marketable mineral diesel fuel (DF) with mixed vegetable-mineral (MDF) engine fuel. The bio-component of MDF is vegetable oil, for example, Camelina seed oil. A design option of a dual-fuel feeding system has been proposed, the main component of which is a mixing and metering unit for vegetable oil and mineral diesel fuel which allows electric metering units controlled by an electronic control unit (ECU) to respond to signals from diesel load-speed sensors (crankshaft speed, injector rack position (fuel injection pump)) and temperature gauge of camelina oil, to ensure the feed of mixed diesel fuel with components of different content. The use of mixed diesel fuel based on vegetable oil, containing for example 50 % of mineral commercial fuel and 50 % of camelina oil, makes it possible with a slight decrease in the effective power (not more than 6 %) and some increase in the specific effective consumption of mixed fuel (up to 14 %) to save 50 % of fuel of petroleum origin, as well as to reduce the smoke opacity of exhaust gases by 17–20 % and reduce the content of carbon oxide by 35–40 % compared with the work of a diesel engine on commercial mineral diesel fuel.

Reduction of Nitric Oxides and Soot by Premixed Fuel in Partial HCCI Engine

2005 ◽  
Vol 128 (3) ◽  
pp. 497-505 ◽  
Author(s):  
Dae Sik Kim ◽  
Myung Yoon Kim ◽  
Chang Sik Lee
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Direct Injection ◽  
Heating System ◽  
Injection System ◽  
Intake Manifold ◽  
Soot Emission ◽  
Nitric Oxides ◽  
Compression Ignition Engine

In order to obtain the reduction effect of NOx and soot emission in a partial homogeneous charge compression ignition engine, premixed fuel was supplied with direct injection diesel fuel. Several additional systems such as a premixed fuel injection system, exhaust gas recirculation (EGR) system, supercharger, and air heating system were equipped in the intake manifold of conventional diesel engine. Premixed fuel with air was compressed and ignited by the directly injected diesel fuel in the combustion chamber at the end of compression stroke. The effect of premixed fuel on combustion and emission characteristics of HCCI diesel engine was investigated experimentally under various conditions of intake air temperature, pressure, and EGR rate. The results showed that in case of the use of gasoline as a premixed fuel, single stage ignition is found, but premixing the diesel fuel accompanies the cool flame prior to the combustion of the directly injected diesel fuel. For the gasoline premixed fuel, both NOx and soot can be reduced by the increase of premixed ratio simultaneously. However, for the diesel premixed fuel, the increase of premixed ratio does not have a significant effect in reducing the soot emission.

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