scholarly journals Diesel Internal Combustion Engine Emissions Measurements for Methanol-Based and Ethanol-Based Biodiesel Blends

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Charalambos A. Chasos ◽  
George N. Karagiorgis ◽  
Chris N. Christodoulou
Keyword(s):  
Internal Combustion Engine ◽  
Diesel Fuel ◽  
Combustion Engine ◽  
Fuel Mixture ◽  
Internal Combustion ◽  
Experimental Investigations ◽  
Biodiesel Fuel ◽  
The European Union ◽  
Fuel Blend ◽  
Biodiesel Blends

There is a recent interest for the utilisation of renewable and alternative fuel, which is regulated by the European Union, that currently imposes a lower limit of 7% by volume of biodiesel fuel blend in diesel fuel. The biodiesel physical characteristics, as well as the percentage of biodiesel blend in diesel fuel, affect the injector nozzle flow, the spray characteristics, the resulting air/fuel mixture, and subsequently the combustion quality and emissions, as well as the overall engine performance. In the present study, two different types of pure biodiesel fuel, namely, methanol-based biodiesel and ethanol-based biodiesel, were produced in the laboratory of Frederick University by chemical processing of raw materials. The two biodiesel fuels were used for blending pure diesel fuel at various percentages. The blends were used for smoke emissions measurements of a diesel internal combustion engine at increasing engine speed and for increasing engine temperatures. From the experimental investigations it was found that ethanol-based biodiesel blends result in higher smoke emissions than pure diesel fuel, while methanol-based biodiesel blends smoke emissions are lower compared to pure diesel fuel.

scholarly journals A 3D modelling of the in-cylinder combustion dynamics of two stroke internal combustion engine in its service condition

2020 ◽  
Vol 39 (1) ◽  
pp. 161-172 ◽  
Author(s):  
A.E. Ikpe ◽  
I.B. Owunna
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Maximum Shear Stress ◽  
Fuel Mixture ◽  
Internal Combustion ◽  
Maximum Temperature ◽  
Ideal Condition ◽  
Gas Temperature ◽  
Ic Engine ◽  
Combustion Dynamics

In this study, a two stroke internal combustion engine was successfully modeled as a closed cycle with the intake, compression, expansion and exhaust processes considered in two strokes of the reciprocating piston. The in-cylinder combusted gases with respect to air-fuel mixture of 14.4:1 in the two stroke engine model were analyzed, showing the dynamics of the combusted gases, the flame pressure and temperature trajectories. It was observed that provided compression and expansion takes place at air-fuel mixture near ideal condition (14.7:1), the combusted gas temperature which occurred in the range of 293.92-3000.60 K is directly proportional to the cylinder gas pressure which occurred in the range of 60.76-80.20 bar. With a heat transfer coefficient of 581.236 W/m2K, the maximum temperature of the IC engine material was found to be 2367.56K at equilibrium and the maximum shear stress was found to be 176 x 102 MPa (1.76 x 105 bar). The 14.4:1 air-fuel mixture implies that 26% O2, 73% N2 and 1% trace gases are the in-cylinder air constituent that will react with 1 mole of hydrocarbon to form the combusted products of 96.2% CO2, 3.2% H2O and 0.6% N2. This will vary in conditions where the air-fuel mixture changes. Keywords: Modelling, Gas dynamics, Two stroke, IC engine, Air-fuel mixture.

scholarly journals Investigation of the environmental characteristics of a diesel engine when operating on activated fuel

2021 ◽  
Vol 1 (1) ◽  
pp. 54-62
Author(s):  
S.A. Plotnikov ◽  
◽  
A.N. Kartashevich ◽  
M.V. Motovilova ◽  
◽  
...  
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engine ◽  
Diesel Fuel ◽  
Laboratory Tests ◽  
Combustion Engine ◽  
Combustion Process ◽  
Internal Combustion ◽  
Fuel Injector ◽  
Exhaust Gases ◽  
Technical Requirements

The internal combustion engine is the most widespread source of energy for vehicles. The main requirements for an internal combustion engine include: the efficiency of functioning as part of a vehicle, high performance indicators, as well as environmental parameters of the emission of exhaust gases into the environment. The fulfillment of these conditions is possible by improving the design of the engine, as well as improving the working process of the diesel engine while increasing the quality of diesel fuel or additional impact directly on the fuel itself. One of the most effective ways to influence diesel fuel is to transfer a certain amount of heat to it in the high-pressure fuel line in front of the injectors. At the same time, the physical and mechanical properties of diesel fuel change, which leads to a change in mixture formation and the combustion process in the engine cylinder. To intensify the combustion process, a method of preliminary high-temperature local heating of diesel fuel in the fuel supply system in front of the injectors was proposed. To achieve this goal, several main directions were identified, including the study of environmen-tal indicators during the intensification of the combustion process. The tests were carried out in stages. At the first stage, the operation of the fuel injector when op-erating on activated fuel (bench, laboratory tests) was investigated. At the next stage, the indicators of the diesel engine in the main modes of its operation were investigated. Bench (laboratory) tests made it possible to draw a conclusion about the operability and compli-ance of the aggregate with the technical requirements of the manufacturer and the parameters of GOST. The bench tests proved the possibility of a diesel engine running on activated fuel without deteriorating environmental performance in the exhaust gases; at the same time, changes in the tox-icity and smoke of the exhaust gases from different values of the average effective pressure were revealed.

scholarly journals Analysis of Air Flow, Air and Fuel Induction for Internal Combustion Engine

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Mohd Fitri Arshad ◽  
◽  
Muhammad Faris Ahmad ◽  
Amir Khalid ◽  
Izuan Amin Ishak ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Flow Behavior ◽  
Combustion Process ◽  
Engine Performance ◽  
Fuel Mixture ◽  
Internal Combustion ◽  
Spark Ignition Engine ◽  
Rotating Flow

In an internal combustion engine, performance, efficiency and emission formation depends on the formation of air-fuel mixture inside the engine cylinder. The fluid flow dynamics plays an important role for air-fuel mixture preparation to obtain the better engine combustion, performance and efficiency. This review article discuss the rotating flow (swirl and tumble) in premixed spark-ignition engine and its effect on turbulence generation and flame propagation. Rotating flow can substantially increase turbulence intensity for the duration of the combustion period. This review paper discusses the in-cylinder swirl and tumble flow that affects air induction during the combustion process in internal combustion engine. Alternatively, this study using computer simulation (Computational Fluid Dynamic, CFD) which offer the opportunity to carry out repetitive parameter studies. An integration-type flowmeter (IFM) also has been used which consists of ultrasonic flowmeter, that integrates the flowrate during the intake process, gives accurate measurements regardless of sampling time and frequency. Research parameter in this study was swirl and tumble that represents the fluid flow behavior occurred inside combustion chamber. Fuel injection and air mass also were the important parameters that have been discussed about in air induction process. The results obtain from the numerical analysis can be employed to examine the homogeneity of air-fuel mixture structure for better combustion process and engine performance.

scholarly journals Internal Combustion Engine Analysis of Energy Ecological Parameters by Neutrosophic MULTIMOORA and SWARA Methods

Energies ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1415 ◽  
Author(s):  
Edmundas Kazimieras Zavadskas ◽  
Audrius Čereška ◽  
Jonas Matijošius ◽  
Alfredas Rimkus ◽  
Romualdas Bausys
Keyword(s):  
Internal Combustion Engine ◽  
Information And Communication Technologies ◽  
Fuel Injection ◽  
Combustion Engine ◽  
Multicriteria Decision Making ◽  
Internal Combustion ◽  
Ratio Analysis ◽  
Injection Time ◽  
The European Union ◽  
Ecological Parameters

The investigation for new innovative solutions to reduce transport pollution is a priority for the European Union (EU). This study includes energy and a sustainable environment, as well as transport, logistics, and information and communication technologies. Energy ecological parameters of internal combustion depend on many factors: fuel, the fuel injection time, engine torque, etc. The engine’s energy ecological parameters were studied by changing engine torques, using different fuels, and changing the start of the fuel injection time. The selection of the optimum parameters is a complex problem. Multicriteria decision-making methods (MCDM) present powerful and flexible techniques for the solution of many sustainability problems. The article presents a new way of tackling transport pollution. The analysis of the energy ecological parameters of the experimental internal combustion engine is performed using the neutrosophic multi-objective optimization by a ratio analysis plus the full multiplicative form (MULTIMOORA) and step-wise weight assessment ratio analysis (SWARA) methods. The application of MCDM methods provides us with the opportunity to establish the best alternatives which reflect the best energy ecological parameters of the internal combustion engine.

scholarly journals MODIFIED ENERGY MODEL OF FRICTION AND WEAR AS APPLIED TO INTERNAL COMBUSTION ENGINE TRIBOCOUPLINGS

2016 ◽  
Vol 2016 (3) ◽  
pp. 58-66
Author(s):  
А. Дойкин ◽  
A. Doykin ◽  
К. Гаврилов ◽  
K. Gavrilov ◽  
В. Лазарев ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Friction And Wear ◽  
Combustion Engine ◽  
Cylinder Liner ◽  
Internal Combustion ◽  
Experimental Investigations ◽  
Wear Model ◽  
Modified Model ◽  
Model Of Friction ◽  
Definition Of

For the description and wear prediction in tribicouplings there are theoretical formulae and also empirical models. Most of well-known regulations may be used only under specific conditions of contacting. The purpose of this work is the investigation of tribicoupling “piston guide – cylinder liner” in an internal combustion engine (ICE). In particular, for that there were carried out experimental investigations on a tribometer realizing a reciprocal motion of piston and cylinder liner samples. The results of experimental investigations were analyzed with the use of a wear model which is the most applicable for the description of this type of tribocouplings. This model is based on the combination of energetic theory and molecularmechanical method with a precise definition of friction surface topography parameters. Such a modified model of friction and wear allows combining the prognostication of a layer worn with fatigue theory that gives a possibility of its use as applied to the life analysis of any reciprocating tribosystem.

Sign in / Sign up

Export Citation Format

Share Document