scholarly journals Possibilities of development of internal combustion engines, including downsizing and rightsizing strategy

2019 ◽  
Vol 24 (6) ◽  
pp. 155-160
Author(s):  
Mateusz Bor ◽  
Marek Idzior ◽  
Wojciech Karpiuk ◽  
Rafał Smolec
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Design Strategies ◽  
Toxic Compounds ◽  
Advantages And Disadvantages ◽  
Economic Parameters ◽  
Further Development

The article discusses the development directions of the then internal combustion engines used in automotive vehicles. The regulations in force regarding permissible emission of harmful and toxic compounds force the vehicle manufacturers to systematically reduce their mass and improve the ecological and economic parameters of engines in order to meet stringent requirements. Favorable application parameters are obtained through the use of downsizing strategies and rightsisers in the construction of motors. The article presents both conceptional concepts. The most important features of downsizing and rightsizing engines, their advantages and disadvantages were determined. There is also described the direction of further development of internal combustion engines, which is characterized by the use of both design strategies.

ANALYSIS OF KNOWN METHODS OF DIAGNOSIS OF INTERNAL COMBUSTION ENGINES

2015 ◽  
Vol 2 (2) ◽  
pp. 445-449 ◽  
Author(s):  
Лемешева ◽  
E. Lemesheva ◽  
Митин ◽  
S. Mitin ◽  
Кондрико ◽  
...  
Keyword(s):  
Internal Combustion Engines ◽  
Chemical Elements ◽  
Thermal Control ◽  
Internal Combustion ◽  
Diagnostic Information ◽  
Technical Diagnostics ◽  
Combustion Engines ◽  
Advantages And Disadvantages ◽  
Control Computer ◽  
The Cost

The article analyzes the effective methods and techniques of diagnosing gasoline internal combustion engines, highlighted the most promising ones. Of the existing seven modern methods considered: thermal control, computer diagnostics, analysis of the composition and quantity of waste gases, technical endoskopirovanie, gauging the compression, the analysis of chemical elements and vibroacoustic. On the presented methods compiled a comparative table on a number of parameters: the cost of ongoing services, the cost of equipment, the length of the diagnostic information content requirements for personnel. The advantages and disadvantages of the methods considered in the parameters. It concludes that characterize the main directions of development of systems of technical diagnostics of internal combustion engines.

scholarly journals On the issue of reducing the negative impact of nitrogen oxides in the system recirculation of diesel exhaust gases on applying the vortex effect

2020 ◽  
Vol 221 ◽  
pp. 02006
Author(s):  
Irina Belinskaia ◽  
Rahim Zainetdinov ◽  
Konstantin Evdokimov
Keyword(s):  
Nitrogen Oxides ◽  
Internal Combustion Engines ◽  
Negative Impact ◽  
Exhaust System ◽  
Internal Combustion ◽  
Solid Particles ◽  
Combustion Engines ◽  
Exhaust Gases ◽  
Advantages And Disadvantages ◽  
Vortex Effect

The problem of negative impact on the environment of motor transport is one of the most fundamental in the complex of global problems. The constant increase in the number of cars with internal combustion engines encourages the search for methods and ways to reduce the volume of negative impulses. The operation of heat engines is accompanied by significant emissions of gaseous harmful substances into the atmosphere, i.e. nitrogen oxides, carbon monoxide, hydrocarbons, as well as solid particles, including soot. The solution to this problem should be implemented within the framework of a systematic approach. To do this, it is necessary to combine the study of technical, economic, and organizational approaches to the organization of the exhaust gas disposal process. To date, there is a significant methodological base in the field of organizational and economic decisions. The article discusses various methods of cleaning exhaust gases of piston engines, their advantages and disadvantages are noted. The method of processing using ammonia is widely known. It is noted that a catalytic method for reducing nitrogen oxides using ammonia is quite economical. However, the optimal temperature range at which nitrogen oxides are reduced is rather narrow. To solve this problem, it is proposed to use the vortex effect in the exhaust system. The efficiency of using a vortex gas recirculation pipe is due to its significant influence on the thermal gasdynamic processes occurring in the exhaust system. Using the principles of non-equilibrium thermodynamics allows us to take into account dissipative processes when establishing the relationship of fuel and economic indicators of internal combustion engines with thermodynamic parameters. This significantly increases the accuracy of calculations and allows you to develop measures to reduce the level of negative impact on the environment.

Camshaft Efficiency Optimization: Employing the Rolling Bearing

2012 ◽  
Author(s):  
Mohsen Bayat Pour
Keyword(s):  
Internal Combustion Engines ◽  
Manufacturing Industry ◽  
Rolling Bearing ◽  
Internal Combustion ◽  
Simulation Software ◽  
New Method ◽  
Combustion Engines ◽  
Rolling Bearings ◽  
Efficiency Optimization ◽  
Advantages And Disadvantages

This paper is intended to discuss the optimization of camshaft efficiency; using the rolling bearing instead of the sliding bearing within the internal combustion engines. The advantages and disadvantages of employing this new method will be accordingly identified and determined in-order to open new windows to the vehicle manufacturing industry. Following the mentioned goal; a camshaft is designed and tested over two types of sliding and rolling bearings in the same conditions of testing. After the comparisons being made; the achieved records have been analyzed and finally the results have been concluded and discriminated by the tables. The calculations and analyses; which are reachable within this paper, are implemented by employing both simulation software and laboratory devices.

scholarly journals Assessment methods of the basic parameters of the combustion process in reciprocating internal combustion engines

2019 ◽  
Vol 179 (4) ◽  
pp. 21-26
Author(s):  
Kazimierz LEJDA ◽  
Michał WARIANEK
Keyword(s):  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Combustion Process ◽  
Internal Combustion ◽  
Polytropic Index ◽  
Logarithmic Scale ◽  
Combustion Engines ◽  
Advantages And Disadvantages ◽  
Work Cycle ◽  
Basic Parameters

The article presents selected methods of assessing the basic parameters of the combustion process, as well as assessing the usability and limitations of the methods used to determine the initiation and the end of the combustion process in reciprocating internal combustion engines. The methods considered are based on data contained in real, developed indicator diagrams. Basic thermodynamic assumptions and the scope of application of the combustion process evaluation method based on the actual work cycle of a combustion engine prepared in a double logarithmic scale were discussed. The article also mentions the application of the following methods: a direct pressure comparison method in the cylinder, the comparison of the first pressure derivative in the cylinder, logarithmic derivative method of pressure change in the cylinder, the method of the polytropic index, method of the first derivative of the polytropic index and the method of constant values of the polytropic index. The article presents the advantages and disadvantages of the research of our methods.

scholarly journals Analysis of the Possibility of Using Low Speed Two-Stroke Dual-Fuel Engines for Propulsion of Sea-Going Vessels

2019 ◽  
Vol 26 (2) ◽  
pp. 45-52
Author(s):  
Mariusz Giernalczyk
Keyword(s):  
Diesel Engines ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Economic Benefits ◽  
Dual Fuel ◽  
Combustion Engines ◽  
Gas Combustion ◽  
Low Speed ◽  
Advantages And Disadvantages ◽  
Dual Fuel Engines

Abstract The use of gas/LNG to supply marine engines in addition to tangible economic benefits is also a method of limiting emissions of harmful substances into the atmosphere and meeting strict environmental protection regulations, especially in special areas. The technology of supplying liquid and gas fuels (Dual Fuel) is most easily used in four-stroke engines but the highest thermal efficiency is ensured by combustion two-stroke piston engines. However, in the first two-stroke dual-fuel engines, the gas supply installation was more complicated than in the four-stroke engine. It resulted, among others from the necessity of compressing the gas to high pressures (15÷30 MPa), for which extremely energy-consuming multi-stage compression systems were needed. The complicated technical system is inherently prone to failures, which is why the dual-fuel low-speed two-stroke diesel engines remained for a long period in the design and experimental phase. In recent years, there has been a significant breakthrough thanks to the introduction of new solutions with the possibility of supplying two-stroke engines with low-pressure gas (less than 1.6 MPa). In recent years, many ships powered by two-stroke, dual-fuel internal combustion engines were commissioned. Some ship-owners owning a fleet of LNG carriers with two-stroke diesel engines that so far have been powered only by liquid fuels have decided to adapt them to gas combustion. This required the adaptation of the engine for gas combustion and the expansion of the supply gas fuel system. This paper is an attempt to analyse the legitimacy of introducing two-stroke, dual-fuel internal combustion engines into the propulsion system and adaptation of engines that are already used to burn gas in them. It presents the changes introduced on one of the LNG gas carriers consisting in adapting the engine to gas combustion through modification of the cylinder head and fuel supply installation. Parameter results of the modified engines obtained during sea trials have been presented. Both advantages and disadvantages resulting from gas combustion have been pointed out. Finally, the possibility of this solution application to other LNG carriers was assessed.

scholarly journals Environmental effect of molecular degradation of internal combustion engine exhaust gases

2021 ◽  
pp. 31-35
Author(s):  
В.В. Мурамович ◽  
В.Ю. Каминский ◽  
С.Н. Турусов
Keyword(s):  
Power Plants ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Ecological Problem ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Exhaust Gases ◽  
Advantages And Disadvantages ◽  
Toxic Components

Рассматривается экологическая проблема очистки отработавших газов углеводородных энергетических установок от токсичных компонентов. Показан состав основных токсичных компонентов, приведены значения энергии связи их молекул. Представлены существующие методы улучшения экологических характеристик двигателей внутреннего сгорания: рециркуляция отработавших газов, снижение степени сжатия, уменьшение угла опережения впрыска, добавление присадок к топливу и др. Перечислены их достоинства и недостатки. Предлагается новый метод – использование электромагнитных полей для очистки отработавших газов от токсичных компонентов. Выполнен оценочный расчет его эффективности. Показано, что применение устройств модификации в топливной системе двигателей внутреннего сгорания, а также в системе выпуска отработавших газов позволяет существенно снизить выбросы в окружающую среду вредных веществ, и, при этом, не требует принципиальных изменений в конструкции двигателей. Рабочий ресурс предлагаемых устройств электромагнитной обработки обусловлен применяемыми для их изготовления материалами. The ecological problem of cleaning the exhaust gases of hydrocarbon power plants from toxic components is considered. The composition of the main toxic components is shown; the values of the binding energy of their molecules are given. The existing methods of improving the environmental characteristics of internal combustion engines are presented: exhaust gas recirculation, reduction of the compression ratio, reduction of the injection advance angle, addition of fuel additives, etc. Their advantages and disadvantages are listed. A new method is proposed – the use of electromagnetic fields for cleaning exhaust gases from toxic components. An estimated calculation of its effectiveness is performed. It is shown that the use of modification devices in the fuel system of internal combustion engines, as well as in the exhaust gas system, can significantly reduce emissions of harmful substances into the environment, and, at the same time, does not require fundamental changes in the design of engines. The materials used for their manufacture determine the working life of the proposed electromagnetic processing devices.

Biofuels in Automobiles: Advantages and Disadvantages: A Review

2019 ◽  
Vol 3 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Ashraf Elfasakhany
Keyword(s):  
Water Vapor ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Alternative Fuel ◽  
Combustion Engines ◽  
Promising Alternative ◽  
Advantages And Disadvantages ◽  
Co2 Balance ◽  
Engine Systems ◽  
Engine Power

Background: Biofuels are one of the promising alternative fuel sources for automobiles. The use of biofuels in combustion engines of automobiles showed many advantages and disadvantages. In this study, the advantages and disadvantages of using biofuels in internal combustion engines are reviewed and summarized based on early studies. Biofuels can offer favorable well-towheel CO2 balance in our environment and improve engine power and efficiency. Oxygen contents in biofuels also provide advantages for the fuel combustion. However, biofuels, also showed some disadvantages, like corrosiveness to engine systems and low heating values of biofuels. Boiling temperature, absorption with water, vapor toxicity, and autoignition of biofuels showed advantages for some types and drawbacks for others.

scholarly journals Introduction of HCCI for Hydrogen Fuel Engines

2020 ◽  
pp. 127-132
Author(s):  
Chuanhao Zhao ◽  
Yang Luo
Keyword(s):  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Homogeneous Charge Compression Ignition ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Compression Ignition ◽  
Hydrogen Fuel ◽  
Advantages And Disadvantages ◽  
Hcci Combustion

This paper is a brief review of the homogeneous charge compression ignition (HCCI) model for hydrogen-fueled internal combustion engines based on an analysis of the advantages and disadvantages of hydrogen internal combustion engines and HCCI combustion. It found that HCCI can be realized in a hydrogen-fueled internal combustion engine, meanwhile the HCCI can effectively reduce the emission of hydrogen internal combustion engine.

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