Performance and Exhaust Emissions of a Diesel Engine Running With DME

2001 ◽  
Author(s):  
F. Maroteaux ◽  
G. Descombes ◽  
F. Sauton
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Exhaust Emissions ◽  
Injection Rate ◽  
Combustion Reaction ◽  
Emissions Reduction ◽  
Turbocharged Diesel Engine ◽  
Turbocharging System ◽  
Performance And Emissions ◽  
Thermodynamic Conditions

Abstract This research investigates engine performance and the potential of reducing exhaust emissions by using Dimethyl Ether (DME) which is an alternative fuel for diesel engines. The objective of this study it to evaluate (on the bed test) the performance and emissions reduction potential of an engine running with DME. A 4 cylinder passenger car HSDI Common Rail turbocharged diesel engine without specific modifications was used. The results obtained on this engine running with DME using diesel fuel as reference are encouraging. In the next steps of this study the injection rate will be adapted to DME operation and to the geometric and thermodynamic conditions of the combustion reaction. A study of the combustion reaction is also necessary in order to optimize the turbocharging system to exclusive DME operation.

Effects of the Re-Entrant Bowl Geometry on a DI Turbocharged Diesel Engine Performance and Emissions—A CFD Approach

2010 ◽  
Vol 132 (12) ◽  
Author(s):  
S. Pasupathy Venkateswaran ◽  
G. Nagarajan
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Combustion Process ◽  
Engine Performance ◽  
Maximum Diameter ◽  
Diffusion Combustion ◽  
Turbocharged Diesel Engine ◽  
Performance And Emissions ◽  
Di Diesel Engine ◽  
Fuel Mixing

The purpose of this study is to investigate the influence of re-entrant bowl geometry on both engine performance and combustion efficiency in a direct injection (DI), turbocharged diesel engine for heavy-duty applications. The piston bowl design is one of the most important factors that affect the air–fuel mixing and the subsequent combustion and pollutant formation processes in a DI diesel engine. The bowl geometry and dimensions, such as the pip region, bowl lip area, and toroidal radius, are all known to have an effect on the in-cylinder mixing and combustion processes. Based on the idea of enhancing diffusion combustion at the later stage of the combustion period, three different bowl geometries, namely, bowl 1 (baseline), bowl 2, and bowl 3 were selected and investigated. All the other relevant parameters, namely, compression ratio, maximum diameter of the bowl, squish clearance and injection rate were kept constant. A commercial CFD code STAR-CD was used to model the in-cylinder flows and combustion process, and experimental results of the baseline bowl were used to validate the numerical model. The simulation results show that, bowl 3 enhance the turbulence and hence results in better air-fuel mixing among all three bowls in a DI diesel engine. As a result, the indicated specific fuel consumption and soot emission reduced although the NOx emission is increased owing to better mixing and a faster combustion process. Globally, since the reduction in soot is larger (−46% as regards baseline) than the increase in NOx (+15% as regards baseline), it can be concluded that bowl 3 is the best trade-off between performance and emissions.

Analysis of Engine Performance Parameters of Electrically Assisted Turbocharged Diesel Engine

2015 ◽  
Vol 799-800 ◽  
pp. 861-864
Author(s):  
Tayfun Özgür ◽  
Kadir Aydın
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Fuel Economy ◽  
Engine Performance ◽  
Performance Parameters ◽  
Turbocharged Diesel Engine ◽  
Charging System ◽  
Electrically Assisted ◽  
Turbocharging System ◽  
Exhaust Energy

Charging system is used to increase the charge density. Supercharging system suffers from fuel consumption penalty because of compressor powered by engine output. Turbocharging system uses wasted exhaust energy that means compressor powered by exhaust turbine but has a turbo lag problem. The electrically assisted turbocharger which can eliminate turbo lag problem and fuel consumption penalty is the topic of this paper. The purpose of this paper is to analyze the effect of electrically assisted turbocharger on diesel engine performance parameters. The AVL Boost software program was used to simulate the electrically assisted turbocharged diesel engine. Simulations results showed that electrically assisted turbocharger increases low end torque and improves fuel economy.

Dual Fuel Turbocharged Engine Operated with Exhaust Gas Recirculation

2016 ◽  
Vol 34 (1) ◽  
pp. 21-27
Author(s):  
H.-W. Wu ◽  
T.-Z. Hsu ◽  
W.-H. Lai
Keyword(s):  
Diesel Engine ◽  
Consumption Rate ◽  
Direct Injection ◽  
Engine Performance ◽  
Exhaust Gas Recirculation ◽  
Dual Fuel ◽  
Exhaust Gas ◽  
Turbocharged Diesel Engine ◽  
Performance And Emissions ◽  
Gas Recirculation

AbstractWith good combustion characteristics, hydrogen has been developing as a clean alternative fuel of engines. This study is to develop a diesel/hydrogen dual fuel engine. The hydrogen was added at inlet port in a 4-cylinder direct injection turbocharged diesel engine with an EGR (Exhaust Gas Recirculation) system to investigate engine performance and exhaust pollutant. The measured items are composed of the gas pressure of cylinder, crank angle, consumption rate of diesel, consumption rate of hydrogen, air flow rate, emissions (HC, CO2, NOX, and Smoke), and so on. The authors analyze how the addition of hydrogen with EGR system influences the engine performance and emissions. The diesel/hydrogen dual fuel turbocharged engine can increase the brake thermal efficiency with a greater decrease in emissions compared with the turbocharged diesel engine. Furthermore, the authors little altered the engine structure to get the positive effect of energy saving and pollutant decreasing.

Improving diesel engine performance and emissions characteristics fuelled with biodiesel

Fuel ◽  
2021 ◽  
Vol 302 ◽  
pp. 121097
Author(s):  
M. Mourad ◽  
Khaled R.M. Mahmoud ◽  
El-Sadek H. NourEldeen
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Performance And Emissions ◽  
Engine Performance And Emissions

scholarly journals Investigation on Physicochemical Properties of Wastewater Grown Microalgae Methyl Ester and its Effects on CI Engine

2020 ◽  
Vol 24 (1) ◽  
pp. 72-87 ◽  
Author(s):  
Sara Tayari ◽  
Reza Abedi ◽  
Ali Abedi
Keyword(s):  
Methyl Ester ◽  
Engine Performance ◽  
Exhaust Emissions ◽  
Biodiesel Production ◽  
Emissions Reduction ◽  
Test Results ◽  
Main Fatty Acid ◽  
Ci Engine ◽  
Hc Emissions ◽  
A Minor

AbstractMicroalgae have been mentioned as a promising feedstock for biodiesel production. In this study, microalgae Chlorella vulgaris (MCV) was cultivated in a bioreactor with wastewater. After biodiesel production from MCV oil via transesterification reaction, chemical and physical properties of MCV methyl ester were evaluated with regular diesel and ASTM standard. Besides, engine performance and exhaust emissions of CI engine fuelled with the blends of diesel-biodiesel were measured. The GC-MS analysis showed that oleic and linoleic acids were the main fatty acid compounds in the MCV methyl ester. Engine test results revealed that the use of biodiesel had led to a major decrease in CO and HC emissions and a modest reduction in CO2 emissions, whereas there was a minor increase in NOx emissions. Furthermore, there was a slight decrease in the engine power and torque while a modest increase in brake specific fuel consumption which are acceptable due to exhaust emissions reduction. The experimental results illustrate considerable capabilities of applied MVC biodiesel as an alternative fuel in diesel engines to diminish the emissions.

scholarly journals A Comparison of Ethanol, Methanol, and Butanol Blending with Gasoline and Its Effect on Engine Performance and Emissions Using Engine Simulation

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1322
Author(s):  
Simeon Iliev
Keyword(s):  
Alternative Fuels ◽  
Fossil Fuels ◽  
Gasoline Engine ◽  
Engine Performance ◽  
Exhaust Emissions ◽  
Engine Simulation ◽  
Engine Model ◽  
Fuel Blends ◽  
Performance And Emissions ◽  
Blended Fuels

Air pollution, especially in large cities around the world, is associated with serious problems both with people’s health and the environment. Over the past few years, there has been a particularly intensive demand for alternatives to fossil fuels, because when they are burned, substances that pollute the environment are released. In addition to the smoke from fuels burned for heating and harmful emissions that industrial installations release, the exhaust emissions of vehicles create a large share of the fossil fuel pollution. Alternative fuels, known as non-conventional and advanced fuels, are derived from resources other than fossil fuels. Because alcoholic fuels have several physical and propellant properties similar to those of gasoline, they can be considered as one of the alternative fuels. Alcoholic fuels or alcohol-blended fuels may be used in gasoline engines to reduce exhaust emissions. This study aimed to develop a gasoline engine model to predict the influence of different types of alcohol-blended fuels on performance and emissions. For the purpose of this study, the AVL Boost software was used to analyse characteristics of the gasoline engine when operating with different mixtures of ethanol, methanol, butanol, and gasoline (by volume). Results obtained from different fuel blends showed that when alcohol blends were used, brake power decreased and the brake specific fuel consumption increased compared to when using gasoline, and CO and HC concentrations decreased as the fuel blends percentage increased.

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