scholarly journals DETERMINATION OF THE QUALITY OF RAPID ENGINE BREAK-IN BY CHANGING THE CRANKCASE GAS FLOW RATE, OIL PRESSURE AND TEMPERATURE

2020 ◽  
pp. 22-27
Author(s):  
М.А. Karpenko ◽  
◽  
G.V. Karpenko ◽  
Keyword(s):  
Pressure Drop ◽  
Internal Combustion Engines ◽  
Gas Flow ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Lubrication System ◽  
General Internal ◽  
Repair Costs ◽  
Engine Testing

he effectiveness of the additive for running-in. In addition, in the process of engine break-in there is a decrease in oil pressure. Reducing the rate of pressure drop and oil temperature in the engine lubrication system characterizes the quality of run-in. The use of various oils with pre-processing compositions containing surface-active agents (SAA) and chemically active substances (CAS), accelerate the process of break-in and improve its quality and reduce repair costs in general. Internal combustion engines of the UMZ-421 brand were studied, speed run-in of which was carried out at the run-in section of OJSC «Ulyanovsk automobile repair plant № 2» and in the internal combustion engine testing laboratory of the Ulyanovsk SAU. It is established that the efficiency of additives and oils in relation to M-8-B oil is distributed as follows during speed-up run-in: ОМД-8; М-8-В SINTEC + 3 % ВАРКС; М-8-В SINTEC + 2 % ОГМ-3 respectively in 3,52; 3,25; 3,07 times. According to the results of the research, it was concluded that the use of fast run-in on various pre-production compositions M-8-in SINTEC (GOST 17479.1- 85) + 2 % OGM-3; M-8 - in SINTEC (GOST 17479.1-85) + 3% VARS; OMD-8 reduces the volume of crankcase gases released up to 3.5 times, reduces the pressure drop in the engine lubrication system during fast run-in from 2.38 times to 1.17 times. Also, the oil temperature in the engine lubrication system decreases at the end of hot running under load by 1.15 times, from 433 K to 376 K. These studies confirm the assumption that the use of rolling oils with additives to accelerate running-in of rubbing surfaces has a positive effect not only on the alignment of the cylinder group, but also other critical friction pairs of the engine UMZ -421.

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 Individual drive of internal combustion engine lubrication system based on switched reluctance motor

2020 ◽  
Vol 6 (2) ◽  
pp. 146-151
Author(s):  
Ihor Holovach ◽  
◽  
Lidiia Kasha ◽  
Ivan Hudzii
Keyword(s):  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Switched Reluctance Motor ◽  
Internal Combustion ◽  
Hydrodynamic Resistance ◽  
Lubrication System ◽  
Resistance Characteristic ◽  
Switched Reluctance ◽  
Reluctance Motor

The article analyses the modern lubrication systems for internal combustion engines. Systems with mechanical drive components that contain mechanical and electronic components have been found to have a number of disadvantages. In particular, when the internal combustion engine is started cold, when the viscosity of the oil is high, the hydrodynamic resistance characteristic rises sharply, which leads to high pressure at low speeds and the drive requires low pump speeds. Again, the increase in oil temperature causes a decrease in viscosity, the hydrodynamic resistance characteristic becomes flatter. This, in turn, reduces the pressure in the lubrication system and requires an increase in pump speed in order to keep the pressure constant. Based on the analysis, the requirements for lubrication systems are formulated and a separate lubrication system with forced oil supply is proposed in this paper. For the drive of pump lubrication system of the internal combustion engine, a switched reluctance motor is proposed and calculated. Such motor by its qualities is one of the most useful in this type of systems.

On the Pressure Relief Valve for the Lubrication System of an Internal Combustion Engine

2007 ◽  
Author(s):  
Antonio Giuffrida ◽  
Rosario Lanzafame
Keyword(s):  
Flow Rate ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Pressure Relief Valve ◽  
Design Parameters ◽  
Lubrication System ◽  
Relief Valve ◽  
Pressure Relief ◽  
Oil Flow

The lubrication system for automotive internal combustion engines consists of several components. Oil flow rate for lubrication is generated by a positive displacement pump equipped with a pressure relief valve, usually present in the casing of the pump to prevent high oil pressures building up in the system and to deliver to the sump the exceeding generated flow rate. This study focuses on the static and dynamic characteristics of the pressure relief valve with considerations about the stability of the overall system, according to design parameters of both the valve and the system itself.

Integrated modelling of internal combustion engine intake and exhaust systems

2001 ◽  
Vol 215 (4) ◽  
pp. 495-506 ◽  
Author(s):  
O Chiavola
Keyword(s):  
Internal Combustion Engines ◽  
Gas Flow ◽  
Complex Geometry ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Integrated Modelling ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
One Dimensional ◽  
Exhaust Systems

This paper presents a new method to analyse the unsteady gas flow in both intake and exhaust systems of internal combustion engines. Such a method is based on the simultaneous use of a one-dimensional model applied to describe the phenomena in ducts, together with a lumped parameter scheme to investigate the cylinder or other volume behaviour, coupled with a three-dimensional model, able to guarantee detailed information on flow behaviour in complex geometry, retaining the advantages of all methods, accuracy as well as fast processing and high flow pattern resolution. The description of the one-dimensional model developed with an example of its application is presented. The integrated approach with the coupling procedure is then described. Finally the results of a multicylinder exhaust system simulation are illustrated.

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.

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.

About a New Conception of Internal Combustion Engine Construction: I—Rotary Engines

2008 ◽  
Author(s):  
Wieslaw J. Oledzki
Keyword(s):  
Gas Turbines ◽  
Internal Combustion Engines ◽  
Gas Flow ◽  
Combustion Engine ◽  
Patent Application ◽  
Weight Ratio ◽  
Internal Combustion ◽  
Substantial Improvement ◽  
Rotary Engine ◽  
Rotary Engines

In the paper I present a new construction of positive displacement internal combustion engines (US patent application 12/218,959, PL patent application PL 385 728). The construction is based on some newly invented mechanisms, the most compact and robust ones in existence, and is particularly suitable for coping with high loads. The construction is intended for high power density Diesel engines (particularly special purpose, e.g. military ones), homogeneous charge compression ignition and detonation engines. The presented conception promises substantial improvement of such important engine parameters as swept volume/total volume, power/total volume and power/weight ratio, without increasing specific loads and thus without sacrificing engine’s strength and reliability. Moreover, there exists a large variety of engine’s configurations within the proposed conception, namely oscillating engines and rotary engines utilizing flat or spatial mechanisms that can be combined with considerable variety of scavenging systems, ignition systems etc. Engines of the proposed structure (including rotary ones) have sealing almost as simple, tight and reliable as conventional ones and much simpler, tighter and much more reliable than conventional (Wankel) rotary engines. Besides the exceptional strength and compactness, the most outstanding features of the engines according to the presented invention are their gas turbines-like qualities. For example, rotary engine of the presented invention can produce 6 power strokes per shaft revolution (thus displaying V12 engine smoothness) while having only 3 major moving parts of extraordinarily strong structure. Moreover, the engine scavenging system makes the gas flow almost as smooth as (and similar to) that to be found in gas turbines. The first part of the paper concerns exclusively rotary engines and discussion of oscillating ones is postponed to the second part. The paper also touches upon the method for balancing the proposed rotary engines as well as an analogous problem of balancing my oscillating engines presented in the second part of the paper.

MODERNIZATION ELEMENTS RESEARCH OF CYLINDER PISTON GROUP OF INTERNAL COMBUSTION ENGINEANNOTATION

2019 ◽  
Vol 1 (12) ◽  
pp. 133-140
Author(s):  
L. Petrov ◽  
O. Lysy ◽  
V. Nikishin ◽  
I. Kishyanus
Keyword(s):  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Theoretical Calculations ◽  
Internal Combustion ◽  
Auxiliary Equation ◽  
Efficiency Coefficient ◽  
Piston Group ◽  
Cylinder Piston

Actuality. Meaning of efficiency coefficient of internal combustion engine fully depends on type and construction. Common world practice of automobile construction is directed on increasing of quality of indicators of usage of internal combustion engine, which is linked to directions of increasing efficiency. Leading overseas firms that “dictate” the engineering direction of the design improvement of internal combustion engines in connection with the improvement of the technology of processing fuel into mechanical work in the engine use various technological opportunities in conjunction with the design developments in the cylindrical piston group. That’s why modernization elements research of cylinder piston group is relevant. Goal. Research possible ways to increase efficiency internal combustion engine by modernization of cylinder piston group due to the scientific work plan. Task. Design measures for internal combustion engine modernization for increasing of quality of its usage. Research methodology. Due to methodology [2] we performed theoretical calculations of efficiency of real engine and efficiency of engine which cylinder piston group was upgraded. While we defied indicating efficiency of patrol engine ZMZ-406 we used auxiliary equation of B. Stechkin. We performed theoretical calculations of functional dependence of efficiency because of working body parameters changes simultaneously.

scholarly journals IMPROVEMENT OF METHODS AND MEANS OF TESTING AGRICULTURAL TRACTOR ENGINES

2020 ◽  
pp. 98-107
Author(s):  
А.П. ИНШАКОВ ◽  
И.А. УСПЕНСКИЙ ◽  
С.В. ТИМОХИН ◽  
И.И. КУРБАКОВ ◽  
М.С. КУРБАКОВА
Keyword(s):  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Software Systems ◽  
Combustion Engines ◽  
Power Graph ◽  
Loading Mode ◽  
Engine Testing ◽  
High Level

Проблема и цель. В настоящее время работы по разработке новых и модернизации выпускаемых дизелей не представляются возможными без проведения лабораторных испытаний, в ходе которых на стендах получают различные характеристики двигателей, проводят настройку и оптимизацию систем ДВС. В этой связи исследования, направленные на повышение эффективности испытания ДВС путем совершенствования методов и средств испытания, использования ПК и современных программных комплексов, являются несомненно актуальными. Таким образом, целью исследования является совершенствование методов и средств испытания тракторных двигателей. Задачами данного исследования является разработка эффективной методики и средств для испытания ДВС, моделирования его характеристик в программных комплексах и его апробация с представлением результатов экспериментальных исследований. Методология. Для выполнения задач исследования была проведена модернизация стенда КИ-5543 ГОСНИТИ, которая позволила расширить его функциональные возможности добавлением функции регистрации быстро протекающих процессов в ходе испытания как в режиме холостого хода, так и в режиме нагружения. Использование АЦП, программного комплекса Power Graph в составе стенда позволяет получать характеристики ДВС в зависимости от различных аргументов, в частности, от оборотов ДВС. Для целей моделирования была использована программа «ДИЗЕЛЬ-РК», предназначенная для расчета и оптимизации двухтактных и четырехтактных двигателей внутреннего сгорания. Результаты. С целью определения эффективности предложенных методов и средств, применимых для испытания двигателей внутреннего сгорания, в данном исследовании был проведен ряд опытов. В результате были получены характеристики переходных процессов ДВС, решены оптимизационные задачи и смоделированы характеристики ДВС в программе «ДИЗЕЛЬ РК». Заключение. Таким образом, в ходе выполнения исследований был представлен современный комплекс, позволяющий на высоком уровне проводить научные исследования и испытания автотракторных двигателей внутреннего сгорания Problem and purpose. Currently, work on the development of new and modernization of manufactured diesel engines is not possible without conducting laboratory tests, during which various engine characteristics are obtained on stands, and internal combustion engine systems are confgured and optimized. In this regard, research aimed at improving the efciency of internal combustion engine testing by improving testing methods and tools, using PCs and modern software systems, is undoubtedly relevant. Thus, the purpose of the study is to improve methods and means of testing tractor engines. The objectives of this study are to develop an efective methodology and tools for testing the internal combustion engine, modeling its characteristics in software systems, and testing it with the presentation of the results of experimental studies.Methodology. To perform the research tasks, GOSNITI Ki-5543 stand was upgraded, which allowed expanding its functionality by adding the function of registering fast-moving processes during the test both in idle mode and in loading mode. Using ADC and Power Graph software package as a part of the stand allows to get characteristics of the internal combustion engine depending on various arguments, in particular, on the engine speed. For modeling purposes, program "DIESEL-RK" was used, designed for calculating and optimizing twostroke and four-stroke internal combustion engines. Results. In order to determine the efciency of the proposed methods and tools used for testing internal combustion engines, a number of experiments were conducted in this study. In the result, the characteristics of the transients of the internal combustion engine solved the optimization problem and the simulated characteristics of the engine in DIESEL RK program. Conclusion. Thus, in the course of the research, a modern complex was presented allowing high-level research and testing of automotive internal combustion engines.

Systematic Reduction of Detailed Chemical Reaction Mechanisms for Engine Applications

2016 ◽  
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 (SRM) 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 CFD 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.

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