scholarly journals Supercapacitors and starting modes of a hybrid car engine

2021 ◽  
Author(s):  
V.S. Antipenko ◽  
S.V. Antipenko ◽  
S.A. Lebedev
Keyword(s):  
Quality Of Life ◽  
Low Temperatures ◽  
Internal Combustion Engines ◽  
Metropolitan Areas ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Hybrid Car ◽  
Start Up

Reducing the start-up time of internal combustion engines, especially at low temperatures and when the batteries are discharged, the use of supercapacitors leads to a reduction in emissions into the atmosphere, improving the quality of life in large metropolitan areas.

scholarly journals Quality Management of Aluminum Pistons with the Use of Quality Control Points

2020 ◽  
Vol 28 (1) ◽  
pp. 29-33
Author(s):  
Grzegorz Ostasz ◽  
Karolina Czerwińska ◽  
Andrzej Pacana
Keyword(s):  
Quality Control ◽  
Production Process ◽  
Internal Combustion Engines ◽  
Control Point ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Control Points ◽  
Control Methods ◽  
Aluminium Piston

AbstractThe publication analyses the way of managing and improving the quality of the production process of aluminum pistons for internal combustion engines. The aim of the article is to propose a method of analysis of the effectiveness of individual control methods used in the process of controlling the aluminium piston. Thanks to the location of a control point with the highest share of product non-compliance detection in the production process, it is possible to reduce quality control points by less effective points, which will contribute to lower costs or shorten the time of production processes. In view of the increasing demands on the efficiency of the checkpoints for components in internal combustion engines, the issue is important and topical.

scholarly journals EXPERT RESEARCH ON THE ESTABLISHMENT DISTURBANCES CAUSES OF TRIBOUNITS OF INTERNAL COMBUSTION ENGINES

2018 ◽  
Vol 18 ◽  
pp. 399-405
Author(s):  
V. I. Fedorchenko ◽  
V. S. Olkhov ◽  
O. M. Panasenko
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Large Area ◽  
Actual Contact ◽  
Operating Modes ◽  
Start Up ◽  
Friction Surfaces ◽  
Number Of Individuals ◽  
Metal Bonds

Recently, the appeals number of individuals and legal entities for establishment disturbances causes in internal combustion engines has increased in the Kharkiv Research Institute of Forensic Examinations. Analyzing the conclusions of performed expert research it was established that one of the main disturbances causes of internal combustion engines is the turning of plain bearings (bearing brass) of crankshaft. Conditions for metals jawing, scratching and grabbing are created during the start-up or turning of the plain bearing when oil does not contact details or while transient operating modes of the engine when the thickness of layer oil is less critical and the surfaces are in contact. This leads to a significant increase of friction surfaces temperature and the destruction of the oil film on. At the same time, the forces acting in the places of actual contact cause stresses exceeding metal yield strength; this leads to the fact that metal plastic deformations occur in thin surface layers, while surface adsorbed oxidizing, gas films and contaminants are destroyed. Simultaneously, the smoothing of irregularities on friction surfaces occurs, thereby their area actual contact is significantly increased. When the friction surfaces close together, interatomic gravities of metals arise, and in the large area of factual contact, metal bonds are formed, similar to interatomic bonds in a continuous metal; this leads to the metal adhesion. This results in a sharp increase of the friction coefficient and intense adhesive deterioration of the rubbing details. It should be noted that provided information can be used by forensic autotechnician experts while research disturbances causes of internal combustion engines.

Systematic Reduction of Detailed Chemical Reaction Mechanisms for Engine Applications

2017 ◽  
Vol 139 (9) ◽  
Author(s):  
Lars Seidel ◽  
Corinna Netzer ◽  
Martin Hilbig ◽  
Fabian Mauss ◽  
Christian Klauer ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Reactor Model ◽  
Mechanism Reduction ◽  
Rating Method ◽  
Chemical Reaction Mechanisms

In this work, we apply a sequence of concepts for mechanism reduction on one reaction mechanism including novel quality control. We introduce a moment-based accuracy rating method for species profiles. The concept is used for a necessity-based mechanism reduction utilizing 0D reactors. Thereafter a stochastic reactor model for internal combustion engines is applied to control the quality of the reduced reaction mechanism during the expansion phase of the engine. This phase is sensitive on engine out emissions, and is often not considered in mechanism reduction work. The proposed process allows to compile highly reduced reaction schemes for computational fluid dynamics application for internal combustion engine simulations. It is demonstrated that the resulting reduced mechanisms predict combustion and emission formation in engines with accuracies comparable to the original detailed scheme.

Assessing the power quality of internal combustion engines operating with different fuels

2016 ◽  
Vol 99 (3) ◽  
pp. 899-905
Author(s):  
Jesús Martínez Patiño ◽  
Miguel A. Hernández Figueroa ◽  
Martín Picón Núñez ◽  
Fernando Ireta Moreno ◽  
Jose Merced Lozano García
Keyword(s):  
Power Quality ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines

Sensitivity Analysis of the Air Flow inside a Single Cylinder Engine for Different Turbulence Models Using CFD

2014 ◽  
Vol 1016 ◽  
pp. 624-629
Author(s):  
Felipe Grossi L. Amorim ◽  
Jean Helder M. Ribeiro ◽  
Marília Gabriela J. Vaz ◽  
Ramon Molina Valle
Keyword(s):  
Internal Combustion Engines ◽  
Turbulence Models ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Single Cylinder ◽  
Greenhouse Gases Emissions ◽  
Single Cylinder Engine ◽  
Computational Resources ◽  
Experimental Pressure

Theincrease of greenhouse gases emissions makes necessary to improve the comprehension of the Internal Combustion Engines operation. One of the factors that affect the combustion in these engines is the turbulence, since it can raise the quality of the fuel-air mixture inside the combustion chamber. However, when modeling internal combustion engines using CFD, the turbulence model choice is always a relevant problem. The present paper analyzes the results for three different turbulence models (k-ε Realizable, RNG k-ε and Menter k-ω SST) ina single-cylinder engine geometry, comparing numerical and experimental pressure data. For this experiment, the k-ε models obtained more trustable results than the k-ω SST, using less computational resources. The models achieved good results for eddy recirculation inside de cylinder and in regions of free shear flow at the valve openings, which makes possible to observe the correlation between parameters such as tumble and turbulent kinetic energy.

scholarly journals Application of Synthetic Filters from Polypropylene in Diesel Locomotive Oil Systems to Improve the Efficiency of Cleaning Engine Oil

2018 ◽  
Vol 7 (4.3) ◽  
pp. 162 ◽  
Author(s):  
Oleksandr Babanin ◽  
Oleksandr Butskiy ◽  
Oleksandr Kovalenko ◽  
Maksym Maksimov
Keyword(s):  
Service Life ◽  
Diesel Engines ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Engine Oil ◽  
Combustion Engines ◽  
Diesel Locomotive ◽  
Synthetic Materials

The questions of application of synthetic materials as filtering, in oil systems of internal combustion engines are considered in the article. In existing oil systems, diesel engines of internal combustion use filtering elements that provide limited protection of oil systems from particles of potentially dangerous dimensions and, therefore, wear. They are not designed to work for a long service life with the higher level of oil purity required at the present time. The urgency of these issues is caused by the need to improve the quality of engine oil cleaning and, as a consequence, to increase the reliability of the engine. The use of filter elements made of porous, fibrous polypropylene is proposed. Which, according to the results of the experiment, will allow to extend the service life of the filter elements and improve the quality of their operation. 

scholarly journals Improvement of the technology for controlling the parameters of the lubricating system of the D-245 diesel engine

2020 ◽  
pp. 163-171
Author(s):  
S.V. Timokhin ◽  
◽  
Yu.V. Rodionov ◽  
I.I. Kurbakov ◽  
◽  
...  
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engine ◽  
Cylinder Head ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Engine Oil ◽  
Combustion Engines ◽  
Lubrication System

А significant factor affecting the reliability of the internal combustion engine and its technical and Economic indicators is the efficiency of the lubrication system. When the standard oil supply is applied, semiliquid friction occurs between the contacting parts, in which the parts are not completely separated by a layer of oil. However, with this friction, the required durability of components and parts with heat removal is guaranteed. The performance of the engine lubrication system is determined by the state of its elements (coarse and fine filters, oil radiator and pump, valves), as well as the quality of oil, its level in the internal combustion engine crankcase and temperature. In domestic internal combustion engines, the minimum oil level in the crankcase is controlled, but in operation there are situations when the oil level exceeds its maximum permissible value. This situation occurs when coolant or fuel enters the lubrication system. Coolant can get into the oil if the cylinder head gaskets, sleeve o-rings, or cracks in the cylinder head and block are broken. Top-Livo can enter the oil through worn and damaged parts of the fuel equipment (gas pump diaphragm, fuel pump plunger pairs, etc.). These liquids sharply degrade the quality of the oil and increase the wear of internal combustion engine parts, and the standard singlelevel indicator will not give the driver operational information about the malfunction. In connection with the above, the purpose of this work is to improve the technology for monitoring the technical condition of the internal combustion engine lubrication system on the example of the d-245 diesel engine and its modifications, which are widely used in GAZ (GAZ-3309), ZIL (ZIL-5301), MAZ (MAZ Zubrenok), PAZ buses (PAZ-3205), MTZ tractors (MTZ — 100, 892, 1020), agricultural and construction equipment.by developing and implementing a built — in device for monitoring the minimum and maximum oil levels in the crankcase, as well as its temperature. The scientific novelty of the work is due to the use of new circuit and technical solutions, as well as the original algorithm of the sensor operation developed by the authors, based on the use of switching laws of reed switches with normally closed and normally open contacts, the operation of which is spaced over time and controlled oil levels. Block diagram of the proposed device comprises a multifunction sensor level and oil temperature, including sensors of the mi-minimum and increased levels of engine oil in the crankcase of the engine and its temperature, the operation mode switch signal cooling temperature-edusei fluid and engine oil, the first and second voltage сomparators, indicator lights, buzzer, switch power supply, voltage regulator and regular temperature sensor coolant. The use of the developed device significantly increases the reliability and convenience of monitoring one of the most important indicators of internal combustion engines-the oil level in the crankcase, which will avoid significant engine damage. As a result of further research, it is planned to develop the device design, conduct laboratory studies of the developed multifunctional sensor in order to determine the dependence of its resistance on the temperature at the normal level of engine oil in the measuring flask, as well as determine the actual values of the developed sensor response heights at the lower and upper levels.

scholarly journals Electronic Study Guides for Applied Bachelor’s Degree Programs

2019 ◽  
Vol 28 (4) ◽  
pp. 134-141 ◽  
Author(s):  
D. V. Maltsev ◽  
E. M. Genson ◽  
D. S. Repetskiy
Keyword(s):  
Internal Combustion Engines ◽  
Field Experiments ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Bachelor's Degree ◽  
Remote Access ◽  
Degree Programs ◽  
Combustion Engines ◽  
Study Guides

The development of electronic study guides (ESG) for Bachelor’s disciplines enables to reduce procurement costs for print library collections. Posting of ESGs on the University Internet resources will provide their accessibility and usability, so the subject is topical. The article analyzes the experience of developing electronic study guides for the disciplines of basic professional bachelor’s degree programs in various universities and reviews the literature on this subject. The main features that distinguish ESG from paper teaching materials are the following: multimedia presentation of information, interactivity, dynamic content. In addition, remote interaction between a teacher and students in forums or video conferences is possible, depending on the format of the ESG. Furthermore, ESG allows one to remotely monitor the completeness and timeliness of the study of certain topics of the discipline, unlike other types of educational and methodological support. The implementation of the ESG makes it possible to maintain control in two forms: internal and external. There are also such criteria for assessing the quality of ESG as: proportion in ensuring the total volume of discipline, proportion in ensuring the self-directed student work, quality of design, the effectiveness of multimedia, adaptability, level of remote access. The result of the analysis was the development of requirements for the ESG design for the discipline «Structure and calculation of engines». This discipline includes the basics of structure and calculation elements and systems of internal combustion engines and the processes occurring in them. In Perm National Research Polytechnic University, according to the curriculum, the discipline is studied for 2 semesters; the labor intensity is 7 credits. Classroom lessons consist of lectures, laboratory and practical classes, additionally, coursework was provided. The difficulty of organizing and maintaining a laboratory in working condition is due to high labor and material costs for fuels and lubricants, electricity, forced-air ventilation, maintenance and repair of internal combustion engines, etc. In this regard, it is relevant to use simulation methods and create virtual laboratory benches to determine the characteristics of the internal combustion engine. These benches may be considered as an alternative to field experiments and stands. As a result of the generalization experience, it was possible to draw up general requirements to the structure and content of the ESG and to provide recommendations on the development of ESGs taking into account the specifics of applied bachelor’s programs.

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