scholarly journals Developing the model of normal operation of starter motor traction relays

2019 ◽  
Vol 124 ◽  
pp. 05039
Author(s):  
Andrey Puzakov
Keyword(s):  
Mathematical Model ◽  
Electric Motor ◽  
Traffic Accident ◽  
Internal Combustion Engines ◽  
Normal Operation ◽  
Combustion Engines ◽  
Magnetomotive Force ◽  
Diagnostic Parameters ◽  
Starter Motor ◽  
Voltage Loss

Malfunction of motor starter traction relays cause the impossibility of the reliable start of internal combustion engines which, if the worst comes to the worst, can create the risk of traffic accident occurrence. Electric resistances of traction relay coils are structural and diagnostic parameters at the same time. Emergence and development of failures causes the change of magnetomotive force generated by the traction relay coils. Critical values of electric resistances correspond to failures of traction relay coils, i.e., inability to perform the built-in functions. The developed mathematical model of traction relay normal operation includes the amount of effort generated and voltage loss on contacts as controlled values for the drive mechanism and the starter electric motor, respectively. The results obtained contribute to the development of the method of motor-and-tractor starter diagnostics without removing it from the engine.

Study of Operation of Power-Generating Devices of Gaseous Fuels Combustion

2015 ◽  
Vol 725-726 ◽  
pp. 1417-1422
Author(s):  
Anton A. Sinitsyn
Keyword(s):  
Mathematical Model ◽  
Combustion Chamber ◽  
Internal Combustion Engines ◽  
Design Stage ◽  
Combustion Engines ◽  
Calculation Methods ◽  
Energy Devices ◽  
Gaseous Fuels ◽  
Further Development ◽  
Production Industry

The paper identifies the relevance of research on the effectiveness of fire-technical processes in energy devices (boilers, furnaces and internal combustion engines, etc.) in order to optimize them and improve their reliability. The survey revealed the closeness of calculation methods for such devices. The development of engineering methodology of design and verification calculations is necessary for the further development of vibration combustion machines production industry. The author identifies the main problems of formation of calculating methodology for energy devices operating on the basis of vibration combustion. To determine the frequency of the impulse response of these devices the author proposes a mathematical model and the description of the process of the thermodynamic fluctuations in the combustion chamber, allowing to determine the reliability and efficiency of these devices for different purposes based on the principle of self-oscillating combustion of fuel at the design stage.

scholarly journals MATHEMATICAL MODEL OF AUTOMATION OF THE DIAGNOSIS OF INTERNAL COMBUSTION ENGINES OF THE YAMZ-238 FAMILY

2021 ◽  
pp. 12-23
Author(s):  
Dmytro Borysiuk ◽  
Viacheslav Zelinskyi ◽  
Igor Tverdokhlib ◽  
Yurii Polievoda
Keyword(s):  
Mathematical Model ◽  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Structural Parameters ◽  
Internal Combustion ◽  
Operating Conditions ◽  
Inverse Transformation ◽  
Combustion Engines ◽  
Functional Relationships

Constructive improvement of mobile energy means, in particular their main unit - the internal combustion engine, is directed on: maintenance of differentiation of size of parameters of functioning of mechanisms of systems depending on variability of conditions and modes of operation of cars; increase of technical resource at use of cars on purpose in the set operating conditions. The existing methods and tools for diagnosing vehicle engines do not fully determine their current technical condition, which requires the development of mathematical models to automate the process of diagnosing their components and parts was found іn the analysis of literature sources. The object of diagnosis is a diesel internal combustion engine of the YaMZ-238 family, which is part of the power unit of most vehicles. Mathematical model of automation of the process of diagnosing internal combustion engines of the YaMZ-238 family is presents in the article. Replacing real technical devices with their idealized models allows the widespread use of various mathematical methods. In this case, the internal combustion engine of the YaMZ-238 family, as the object of diagnosis, is presented in the form of a «black box», the input and output parameters of which have a finite set of values. In general, the mathematical model is a system of functional relationships between each diagnostic signal and structural parameters. For internal combustion engines of the YaMZ-238 family, a diagnostic matrix has been compiled, which includes a list of faults and signs of faults. It is determined that the process of diagnosis based on the model of the diagnostic object is possible if the inverse transformation of the number of signs of malfunctions into the number of structural parameters (malfunctions) of the object was unambiguous. The proposed mathematical model of automation of the process of diagnosing internal combustion engines of the family YaMZ-238 will detect faults of components and parts depending on their characteristics.

scholarly journals Modeling of failures of the starter electric motor

2019 ◽  
Vol 298 ◽  
pp. 00006 ◽  
Author(s):  
Andrey Puzakov
Keyword(s):  
Electric Motor ◽  
Electrical Resistance ◽  
Internal Combustion Engines ◽  
Traffic Accidents ◽  
Road Traffic ◽  
Short Circuit ◽  
Combustion Engines ◽  
Road Traffic Accidents ◽  
In Series ◽  
Electrical Faults

Failures of automotive starters make it impossible to reliably start internal combustion engines, which, under adverse circumstances, may cause a risk of road traffic accidents. A significant part of starter failures is associated with electrical faults in electric motors. The occurrence and development of failures causes a change in the torque produced by the starter. A mathematical model of the starter’s performance dependant from the magnitude of the electrical resistance of its windings was developed. Physical modeling of failures was carried out using an adjustable active resistance connected in series and parallel to the armature winding. Critical values of electrical resistance correspond to an open and short circuit of the armature winding of the starter electric motor, and, consequently, to starter failure. The results obtained are instrumental to the development of a diagnostics method for automotive starters without removing them from the motor.

The Practical Design of Turbocharger Turbines Using a Throughflow-Based Optimisation Process

2012 ◽  
Author(s):  
Graham D. Cox
Keyword(s):  
Knowledge Base ◽  
Electric Motor ◽  
Internal Combustion Engines ◽  
Preliminary Design ◽  
Combustion Engines ◽  
Two Stage ◽  
General Applicability ◽  
Choice Of Major ◽  
Practical Design ◽  
Selection Of

The modern trends in automotive turbocharger applications are towards the boosting of smaller internal combustion engines and more advanced systems including two-stage, turbo-compounding and hybrid electric-motor assist. Off-the-shelf turbochargers will become a smaller share of the market and the choice of major parameters for the compressor and turbine, e.g. speed and diameter, will fall outside of the manufacturer’s knowledge base. The selection of the compressor and turbine may even be independent. The only certainty is that the turbomachinery will have to be small, cheap and efficient. To provide some guidance to the turbine designer, this paper presents the results of a study in which practical designs have been generated to cover the range of conceivable parameters, presented in non-dimensional terms to provide general applicability. All the designs are generated using a throughflow-based optimisation system in which the candidate geometries are assessed against mechanical as well as aerodynamic and inertia targets. Analysis of the results gives clues to the form of the basic empiricism that would be of use in the preliminary design of automotive turbocharger turbines.

scholarly journals Cylinder sleeve of the internal combustion engine. Mathematical model of the deformation process

2021 ◽  
Vol 2131 (2) ◽  
pp. 022072
Author(s):  
E Gubin ◽  
S Andriushchenko ◽  
K Mochalin
Keyword(s):  
Mathematical Model ◽  
Internal Combustion Engine ◽  
Deformation Process ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Two Stage ◽  
Cylinder Sleeve ◽  
Neutral Section

Abstract During the operation of internal combustion engines, deformation of the cylinder sleeve is possible, which causes its premature wear during the operation of the “piston ring – sleeve” pair. Imagine the sleeve as a two-stage hollow cylinder with forces applied to it, which cause deflection in the section. It can be assumed that if the greatest deformation of the cylinder is in the section of the application of forces, then with distance from this place it will decrease. At some distance from the point of application of forces, the deflection of the sleeve will be equal to zero. It is required to simulate a mathematical formula that would make it possible to evaluate the possibility of estimating the value depending on the basic geometric dimensions of the cylinder sleeve. A mathematical model of the deformation process of a hollow two-stage sleeve of an internal combustion engine has been developed, an analytical dependence has been obtained for the value of the “neutral” section depending on the main geometrical dimensions of the cylinder sleeve of the engine, a rather extensive analysis of the influence of various parameters on the value of the “neutral” section has been carried out.

scholarly journals ENERGY EFFICIENT ELECTROMECHANICAL SOIL TREATMENT SYSTEM BASED ON ELECTRIC MOTORBLOCK

2021 ◽  
pp. 71-78
Author(s):  
Ihor Nazarenko ◽  
Oleksandr Kovalov
Keyword(s):  
Motor Unit ◽  
Direct Current ◽  
Electric Motor ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Maximum Efficiency ◽  
Experimental Sample ◽  
Combustion Engines ◽  
Traction Motor ◽  
Soil Structures

In Ukraine, the number of farms, private land users and protected soil structures has increased significantly in recent years. To increase the efficiency of vegetable production, small-sized mobile units in the form of motoblocks with internal combustion engines of domestic and foreign production have been widely used. However, during the operation of mobile units with internal combustion engines in greenhouses and hotbeds, the noise level and air pollution increase, which negatively affect not only people but also plants. The disadvantages of motoblocks with internal combustion engines should also include a fairly high specific consumption of liquid fuel, which has a high cost, difficulties in starting and stopping the unit, as well as the relatively low reliability of the internal combustion engine. More promising for work in protected soil structures are mobile units with traction motors, called electric motors, as environmentally friendly units that do not have these shortcomings. The main technical characteristics of the experimental sample of a small-sized electrified soil-cultivating motoblock are given in the work. The structural scheme of the power energy channel of the electric motor unit is substantiated, which clearly demonstrates the processes of energy conversion in it. The equation of energy balance of the electric motor unit and the main energy ratios that determine the properties of the traction motor in the drive of the electric motor unit are obtained. The algorithm of optimal control of a direct current traction motor by the maximum efficiency for direct current motors of serial and mixed excitation is substantiated. The results of field tests of the prototype of the electric motor unit are presented. The analysis of the obtained results of experimental researches of the electrified tillage motor-drive driven by the direct current motor of sequential excitation testifies to the reduction of specific energy consumption for the main types of tillage by 12-15%.

scholarly journals MODELLING OF INTERNAL COMBUSTION ENGINES’ EMISSION THROUGH THE USE OF TRAFFIC FLOW MATHEMATICAL MODELS

Transport ◽  
2011 ◽  
Vol 26 (3) ◽  
pp. 271-278 ◽  
Author(s):  
Raimundas Junevičius ◽  
Marijonas Bogdevičius ◽  
Ádám Török
Keyword(s):  
Mathematical Model ◽  
Traffic Flow ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Flow Speed ◽  
Model Description ◽  
Regression Equations ◽  
Combustion Engines ◽  
Traffic Flows ◽  
The Mathematical Model

Road traffic flows on a straight road segment are modelled in this article. The mathematical model of traffic flows has been constructed by using the method of lumped parameters. CO2, CO, CH, NOx, PM regression equations of internal combustion engines’ (ICE) emission has been developed. The accuracy of regression equations is 0.98÷0.99. The article presents assumptions for constructing the mathematical model, description of the mathematical model and gives simulation results. Traffic flow parameters, such as traffic flow concentration and traffic flow speed are presented as modelling results. ICE emission depending on the concentration and traffic flow speed are presented as well.

scholarly journals Motores Elétricos Flex a Etanol: uma nova Era no Setor Automotivo Mundial

2018 ◽  
Vol 12 (12) ◽  
pp. 45 ◽  
Author(s):  
Silvio Rodrigo Dos Reis ◽  
Elaine Aparecida Da Silva
Keyword(s):  
Electric Motor ◽  
Alternative Energy ◽  
Internal Combustion Engines ◽  
Daily Activities ◽  
Combustion Engines ◽  
Global Awareness ◽  
Electric Cars ◽  
Alternative Energy Sources ◽  
Current Consumption ◽  
Development Policies

O conceito de motores elétricos está inserido na sociedade desde meados do século XIX. O advento do petróleo e a maior eficiência do motor a combustão interna a gasolina fez com que o desenvolvimento dos elétricos permanecesse adormecido por várias décadas. Ressurgiu este conceito após a conscientização mundial sobre problemas de poluição ambiental, que os motores a combustão, movidos com petróleo e derivados trouxeram ao longo dos anos, originando a introdução de políticas de desenvolvimento sustentável, que visa eliminar a circulação de veículos com motores a combustão interna pelos países europeus nos próximos anos. Fontes alternativas de energia, como o etanol, auxilia na propulsão do motor elétrico, cuja eficiência fica comprometida em longas distâncias e em veículos de médio e grande porte. O motor elétrico híbrido flex a etanol é uma alternativa eficaz para atender aos padrões atuais de consumo, já que há muito tempo se tem o motor a combustão interna a etanol eficiente, bem como auxiliar a falta de oferta de uma ampla rede de reabastecimento de baterias elétricas, possibilitando que o consumidor possa realizar suas atividades diárias sem a preocupação com a falta de disponibilidade de eletropostos em algumas cidades do território nacional.Palavras-chave: Motor. Elétrico. Etanol. Automóveis. Híbrido.AbstractThe electric motors concept has been inserted in the society since the mid-nineteenth century. The oil advent and the internal gasoline-fueled engine increased efficiency meant that the electric cars development had remained dormant for several decades. This concept emerged after global awareness of the environmental pollution problems caused by oil-derived combustion engines, which led to the introduction of sustainable development policies to eliminate the vehicles circulation with internal combustion engines by European countries in the next years. Alternative energy sources, such as ethanol, help propel the electric motor, whose efficiency is compromised over long distances and in medium and large vehicles. The ethanol-flex hybrid electric motor is an effective alternative to meet current consumption standards, since the engine has long been the fuel-efficient domestic ethanol, as well as adi the lack of supply of a wide network of battery replenishment making it possible for the consumer to carry out his or her daily activities without worrying about the lack of electricity availability in some cities of the national territory.Keywords: Motor. Electric. Ethanol. Automobiles. Hybrid.

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