scholarly journals Study on Combustion and Emission Characteristics of Marine Diesel Oil and Water-In-Oil Emulsified Marine Diesel Oil

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1830 ◽  
Author(s):  
Moonchan Kim ◽  
Jungmo Oh ◽  
Changhee Lee
Keyword(s):  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Direct Injection ◽  
Internal Combustion ◽  
Diesel Oil ◽  
Combustion Efficiency ◽  
Compression Ignition ◽  
Compression Ignition Engines ◽  
Brake Mean Effective Pressure ◽  
Marine Diesel

Compression ignition engines used as marine engines are the most efficient internal combustion engines. They are well-established products, and millions are already on the market. Water-in-MDO (marine diesel oil) emulsions are the best alternative fuel for compression ignition engines and can be utilised with the existing setup of 2.0 L automotive common rail direct injection (CRDI) engines. They have benefits for the simultaneous reduction of both NOx and smoke (black carbon). Furthermore, they have a significant impact on the improvement of combustion efficiency. Micro-explosions are the most important phenomenon of water-in-diesel emulsions inside an internal combustion engine chamber. They affect both the emission reduction and combustion efficiency improvements directly and indirectly in accordance with the brake mean effective pressure (BMEP) and rpm. Owing to the influence of micro-emulsions on the combustion and emissions of water-in-diesel emulsion fuel, the reduction ratios of NOx and smoke in a used engine are approximately 30% and 80%, respectively. The effect of the operating parameters on micro-emulsions is presented.

scholarly journals Diagnosing of misfire events in compression-ignition engines with the help of vibroacoustic methods in the aspect of OBD system application in diesel locomotives

2008 ◽  
Vol 132 (1) ◽  
pp. 3-16
Author(s):  
Jerzy MERKISZ ◽  
Marek WALIGÓRSKI
Keyword(s):  
Internal Combustion Engines ◽  
Combustion Engine ◽  
High Reliability ◽  
Direct Injection ◽  
Combustion Process ◽  
Vibration Signal ◽  
Internal Combustion ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Railway Traction

The article concerns the possibilities of use of the method being able to assess of the combustion process and its lack in internal combustion engines of railway traction vehicles, that bases on the use of vibration signal parameters. The paper includes the results of research conducted on the engine test bench with a single cylinder research and compression-ignition engine with direct injection, and tests for the engine of a diesel locomotive in the exploitation condition. Possibility of the vibration signal estimators application to the assessment of a combustion process lack in an internal combustion engine and a high reliability of combustion process diagnostics basing on the above method have been proved.

scholarly journals Effects of mixture formation strategies on combustion in dual-fuel engines – a review

2021 ◽  
Vol 184 (1) ◽  
pp. 30-40
Author(s):  
Ireneusz Pielecha ◽  
Maciej Sidorowicz
Keyword(s):  
Internal Combustion Engines ◽  
Direct Injection ◽  
Combustion Process ◽  
Critical Factor ◽  
Diesel Oil ◽  
Combustion Efficiency ◽  
Dual Fuel ◽  
Compression Ignition ◽  
Mixture Formation ◽  
Spark Plug

The article presents an overview of technical solutions for dual fuel systems used in internal combustion engines. It covers the historical and contemporary genesis of using two fuels simultaneously in the combustion process. The authors pay attention to the value of the excess air coefficient in the cylinder, as the ignitability of the fuel dose near the spark plug is a critical factor. The mixture formation of compression ignition based systems are also analyzed. The results of research on indirect and direct injection systems (and their combinations) have been presented. Research sections were separated based to the use of gasoline with other fuels or diesel oil with other fuels. It was found that the use of two fuels in different configurations of the fuel supply systems extends the conditions for the use of modern combustion systems (jet controlled compression ignition, reactivity controlled compression ignition, intelligent charge compression ignition, premixed charge compression ignition), which will enable further improvement of combustion efficiency.

Application of Hyperbolic Tangent Approximation Model to Gasoline Direct Injection Engine Simulation

2017 ◽  
Author(s):  
Tomoyuki Hosaka ◽  
Taisuke Sugii ◽  
Eiji Ishii ◽  
Kazuhiro Oryoji ◽  
Yoshihiro Sukegawa
Keyword(s):  
Open Source ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Direct Injection ◽  
Internal Combustion ◽  
Experimental Results ◽  
Gasoline Direct Injection ◽  
Pollutant Emissions ◽  
Mixture Formation ◽  
Hyperbolic Tangent

The improved fuel economy and low pollutant emissions are highly demanded for internal combustion engines. Gasoline Direct Injection (GDI) engine is the one of promising devices for highly efficient engine. However, GDI engines generally tend to emit more Particulate Matter (PM) than Port Fuel Injection (PFI) engine because the fuel sprayed from the injector can easily attach to the wall, which is the major origin of PM. Therefore, the precise analysis of the fuel/air mixture formation and the prediction of emissions are required. From the view of industrial use, Computational Fluid Dynamics (CFD) becomes a necessary tool for the various analyses including the fuel/air mixture formation, spray attachment on the cylinder wall, the in-cylinder turbulence formation, the combustion and emission etc. In our previous study, the flow and spray simulation in internal combustion engine has been conducted using OpenFOAM®, the open-source CFD toolbox. Since the engine involves the dynamic motion such as valve and piston, the morphing and mapping approach was employed. Furthermore, by virtue of open-source code, we have developed the methodology of the hybrid simulation from the internal nozzle flow to the fuel/air mixture in order to take into account detailed breakup process nearby injector nozzle. We expand the above research to the combustion simulation. For the combustion model, the Hyperbolic Tangent Approximation (HTA) model is adopted. The HTA model has a simple form of equation and one can easily implement; moreover, the HTA model has the following features: 1. capability of both laminar and turbulent flow, 2. the clearness of analytical derivation based on the functional approximation of the reaction progress variable distribution in a one-dimensional laminar flame. In the current study, the premixed flame is studied on a gasoline combustion engine. The simulations for in-cylinder engine are conducted with different Air/Fuel (A/F) ratio conditions, and the results are compared with the experimental results. The in-cylinder pressure agrees well with experimental results and the validity of the current methodology is confirmed.

A Feasibility Study into the Use of Direct Injection of Exhaust Generated Steam for Improving the Efficiency of Reciprocating Internal Combustion Engines

1980 ◽  
Vol 194 (1) ◽  
pp. 157-169
Author(s):  
L. C. Hall ◽  
M. E. Saatci
Keyword(s):  
Computer Simulation ◽  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Direct Injection ◽  
Thermodynamic Cycle ◽  
Steam Injection ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Three Stages

This paper reports on a study into the feasibility of generating steam, using the exhaust gases of a reciprocating internal combustion engine, and expanding it in the cylinders of the engine to produce additional power without increasing the fuel consumption. The study was conducted in three stages; firstly an equivalent ideal thermodynamic cycle was analysed to examine the fundamental principles, secondly a computer simulation was carried out based on a particular engine, and thirdly an attempt was made to modify the engine and run it with steam injection. The results suggest that this proposal is thermodynamically sound and could in practice permit substantial gains in efficiency using relatively straightforward technology.

scholarly journals A Model of Fuel Combustion Process in The Marine Reciprocating Engine Work Space Taking Into Account Load and Wear of Crankshaft-Piston Assembly and The Theory of Semi-Markov Processes

2016 ◽  
Vol 23 (3) ◽  
pp. 50-57 ◽  
Author(s):  
Jerzy Girtler
Keyword(s):  
Markov Processes ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Diesel Oil ◽  
Fuel Combustion ◽  
Engine Operation ◽  
Work Space ◽  
State Process ◽  
Marine Diesel ◽  
Semi Markov Processes

Abstract The article analyses the operation of reciprocal internal combustion engines, with marine engines used as an example. The analysis takes into account types of energy conversion in the work spaces (cylinders) of these engines, loads of their crankshaft-piston assemblies, and types of fuel combustion which can take place in these spaces during engine operation. It is highlighted that the analysed time-dependent loads of marine internal combustion engine crankshaft-piston assemblies are random processes. It is also indicated that the wear of elements of those assemblies resulting from their load should also be considered a random process. A hypothesis is formulated which explains random nature of load and the absence of the theoretically expected detonation combustion in engines supplied with such fuels as Diesel Oil, Marine Diesel Oil, and Heavy Fuel Oil. A model is proposed for fuel combustion in an arbitrary work space of a marine Diesel engine, which has the form of a stochastic four-state process, discrete in states and continuous in time. The model is based on the theory of semi-Markov processes.

scholarly journals A Review of Hydrogen Direct Injection for Internal Combustion Engines: Towards Carbon-Free Combustion

2019 ◽  
Vol 9 (22) ◽  
pp. 4842 ◽  
Author(s):  
Ho Lung Yip ◽  
Aleš Srna ◽  
Anthony Chun Yin Yuen ◽  
Sanghoon Kook ◽  
Robert A. Taylor ◽  
...  
Keyword(s):  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Current Knowledge ◽  
Direct Injection ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Flammability Limits ◽  
Compression Ignition Engine ◽  
Engine Operation ◽  
Engine Industry

A paradigm shift towards the utilization of carbon-neutral and low emission fuels is necessary in the internal combustion engine industry to fulfil the carbon emission goals and future legislation requirements in many countries. Hydrogen as an energy carrier and main fuel is a promising option due to its carbon-free content, wide flammability limits and fast flame speeds. For spark-ignited internal combustion engines, utilizing hydrogen direct injection has been proven to achieve high engine power output and efficiency with low emissions. This review provides an overview of the current development and understanding of hydrogen use in internal combustion engines that are usually spark ignited, under various engine operation modes and strategies. This paper then proceeds to outline the gaps in current knowledge, along with better potential strategies and technologies that could be adopted for hydrogen direct injection in the context of compression-ignition engine applications—topics that have not yet been extensively explored to date with hydrogen but have shown advantages with compressed natural gas.

scholarly journals Multipurpose conversion of marine diesel engines when creating piston motor-compressor units

2021 ◽  
Vol 5 (3) ◽  
pp. 14-22
Author(s):  
V. L. Yusha ◽  
◽  
G. I. Chernov ◽  
I. D. Obukhov ◽  
O. G. Bessonov ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Piston Compressor ◽  
Rankine Cycle ◽  
Internal Combustion ◽  
Marine Diesel ◽  
Engine Compressor ◽  
Mobile Compressor ◽  
Compressor Performance

This paper present an assessment of the energy efficiency of various combinations of piston stages of an internal combustion engine, a compressor, and a Rankine engine as part of piston motor-compressor units based on modernized marine diesel engines. An eight-cylinder single-row diesel engine 8Ch23/30-1 is chosen as the object of research, the base of which is used as a single platform for creating powertechnology units for various purposes and power. The proposed variants for converting the original engine allow, with minimal costs for the development of design and manufacturing technology, to create gas engine compressor units with reduced fuel consumption and improved weight and size characteristics in comparison with the known mobile compressor stations driven by diesel internal combustion engines. In the paper, on the basis of the developed mathematical models of working processes, the possibility of joint operation of diesel cylinders with piston expanders of the Rankine cycle and one or more stages of a piston compressor is assessed. Various possible combinations of diesel cylinders, compressor cylinders and expander cylinders are considered, as well as the dependences of engine power and compressor performance depending on the number of compressor stages and the number of diesel power cylinders used.

scholarly journals Statistical assessment of injection aparatus of diesel

2018 ◽  
Vol 182 ◽  
pp. 01023
Author(s):  
Wiktor Kupraszewicz
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Technological Condition ◽  
Compression Ignition ◽  
Statistical Assessment ◽  
Special Regard ◽  
Ecological Conditions ◽  
Compression Ignition Engines ◽  
Special Meaning

The issue of estimating technological condition of internal combustion engine gathers special meaning mostly in using stage, in consideration of economic and ecological conditions. Appliances which are used now a days and which diagnose condition of subjects such as compression - ignition engines, are limited only to the measurements. This article discusses problems of methods diagnosis with special regard of fuel apparatus

Study of Combustion Anomalies of H2-ICE With External Mixture Formation

2006 ◽  
Author(s):  
Stephen A. Ciatti ◽  
Thomas Wallner ◽  
Henry Ng ◽  
William F. Stockhausen ◽  
Brad Boyer
Keyword(s):  
Internal Combustion Engines ◽  
Large Scale ◽  
High Efficiency ◽  
Combustion Engine ◽  
Direct Injection ◽  
Combustion Process ◽  
Engine Performance ◽  
Internal Combustion ◽  
Hydrogen Combustion ◽  
Mixture Formation

Although hydrogen is considered one of the most promising future energy carriers, there are several challenges to achieving a “hydrogen economy,” including finding a practical, efficient, cost-effective end-use device. Using hydrogen as a fuel for internal combustion engines is seen as a bridging technology toward a large-scale hydrogen infrastructure. To facilitate high-efficiency, high-power-density use of hydrogen with near-zero emissions in an internal combustion engine, detailed analysis of the hydrogen combustion process is necessary. This paper presents thermodynamic results regarding engine performance and emissions behavior during investigations performed on a single-cylinder research engine fueled by pressurized gaseous hydrogen. Avoiding combustion anomalies is one of the necessary steps to further improve the hydrogen engine power output at high-load operation while, at the same time, reducing fuel consumption and emissions during part-load operation. The overall target of the investigations is an improved combustion concept especially designed for hydrogen-engine-powered vehicles. Future activities include performing optical imaging of hydrogen combustion by using an endoscope. We will also investigate supercharged external mixture formation, as well as hydrogen direct-injection operation.

Sign in / Sign up

Export Citation Format

Share Document