scholarly journals SOLVING APPLIED PROBLEMS OF AUTOMATING THE PREPARATION OF MODERN TECHNOLOGICAL PROCESSES OF MECHANICAL PROCESSING

2019 ◽  
pp. 97-102
Author(s):  
Viktor Dubchak
Keyword(s):  
Equilateral Triangle ◽  
Machine Tools ◽  
Internal Combustion Engines ◽  
Combustion Engines ◽  
Mechanical Processing ◽  
Technological Processes ◽  
Different Types ◽  
Common Center ◽  
The Common ◽  
The Difference

The article proposes a technique for solving applied problems for the preparation of technological processes of mechanical processing on machine tools with numerical programmed control (CNC) of different types of profiled surfaces with the aim of ensuring their further precise connection. In particular, the question of the optimal coverage of the “circle” profile with the common center of these profiles by the “equilateral triangle” profile is investigated. These tasks are relevant in the processing of parts of rotary-piston internal combustion engines, parts of profile joints with equiaxial contour and in other similar technologies. In the work, the value of the function determining the difference of areas, according to which these profiles do not coincide, was obtained, the function was investigated for extremality, two points of its extremum were determined in the domain of definition, it was shown that at one of these points the function acquires a minimum . The conditions for such an extremal coverage of one profile in accordance with another profile are established, figures are given for the formulation and solution of the problem, conclusions are made.

https://elibrary.ru/item.asp?id=44369782&pf=1

2020 ◽  
Author(s):  
QI CHEN ◽  
◽  
JINTAO SUN ◽  
JIANYU LIU ◽  
BAOMING ZHAO ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Internal Combustion Engines ◽  
Nonequilibrium Plasma ◽  
Combustible Mixture ◽  
Combustion Engines ◽  
Combustion Chemistry ◽  
Microwave Radio ◽  
Different Types ◽  
Gas Molecules ◽  
Ignition And Combustion

Plasma-assisted ignition and combustion, widely applied in gas turbines, scramjets, and internal combustion engines, has been considered as a promising technique in shortening ignition delay time, improving combustion energy efficiency, and reducing emission. Nonequilibrium plasma can excite the gas molecules to higher energy states, directly dissociate or ionize the molecules and, thereby, has the potential to produce reactive species at residence time and location in a combustible mixture and then to efficiently accelerate the overall pyrolysis, oxidation, and ignition. Previous studies have demonstrated the effectiveness of plasma-assisted combustion by using direct current, alternating currant, microwave, radio frequency, and pulsed nanosecond discharge (NSD). Due to the complicated interaction between plasma and combustion in different types of plasma, detailed plasma-combustion chemistry is still not well understood.

scholarly journals The influence of centrial forces on crankshaft bearing lubrication is in emergency modes of the engine of the car

2021 ◽  
Vol 12 (2) ◽  
pp. 112-121
Author(s):  
Oleksandr Khrulev ◽  
◽  
Olexii Saraiev ◽  
Iryna Saraieva ◽  
◽  
...  
Keyword(s):  
Internal Combustion Engines ◽  
Operating Mode ◽  
Internal Combustion ◽  
Technical Condition ◽  
Operating Conditions ◽  
Combustion Engines ◽  
Connecting Rod ◽  
Oil Supply ◽  
Technical Expert ◽  
The Difference

The analysis of the crankshaft bearing condition of the automotive internal combustion engines in the case of insufficiency and breakage of oil supply to them is carried out. It is noted that this fault is one of the most common causes of damage to rubbing pairs in operation. At the same time, the different groups of bearings are often damaged, which cannot be explained within the framework of existing models of plain bearing lubrication. The objective of the work is to develop a mathematical model of oil supply to connecting rod bearings in emergency mode, taking into account the characteristic features of the bearing design. The model also, depending on the nature of the damage, should help to determine and explain the causes of bearing failures if they occur in different modes when operating conditions are broken. A computational model has been developed that makes it possible to assess the effect of design differences in the features of oil supply and the action of the centrifugal forces during crankshaft rotation on the oil column in the lubrication hole where oil is supplied to the conrod bearing. Calculations of the change in time of the oil supply pressure to the connecting rod bearings for the various designs of the crankshaft lubrication holes have been performed. It is shown that, depending on the operating mode of the engine and its design, the oil pressure in front of the connecting rod bearings does not disappear immediately after oil supply failure to crankshaft. Moreover, the lower the crankshaft speed is, the longer the lubrication of the conrod bearings will continue. The calculation results are confirmed by the data of the expert studies of the engine technical condition, in which the crankshaft was wedged in the damaged main bearings was found in the absence of serious damage to the connecting rod ones. It has been found that such features of the damage correspond to an rapid breakage of the oil supply to the crankshaft in the case of such operational damage as the oil pump and pressure reducing valve failure, the oil filter seal and oil pan destruction, etc. The developed model explains the difference in lubrication conditions and in the damage feature to the main and connecting rod bearings in the emergency cases of the oil supply breakage, which are observed during operation, and helps to clarify the failure causes. This makes it possible to use the model and the obtained data when providing auto technical expert studies of the failure causes of automobile internal combustion engines This makes it possible to use the model and the obtained data when providing auto technical expert studies of the failure causes of automobile internal combustion engines when the operating conditions are broken.

15. Business Organizations

2019 ◽  
pp. 421-451
Author(s):  
Lucy Jones
Keyword(s):  
Limited Liability ◽  
Business Organizations ◽  
Limited Partnership ◽  
Legal Personality ◽  
Different Types ◽  
The Common ◽  
The Difference ◽  
Set Up ◽  
Limited Liability Partnership ◽  
The Relationship

This chapter discusses the common types of business organizations and explains the difference between unincorporated and incorporated businesses. The three types of partnership arrangements are considered, namely a general (ordinary) partnership, a limited partnership, and a limited liability partnership. The chapter includes discussion of the rules relating to partnerships under the Partnership Act 1890 and the Limited Liability Partnership Act 2000. It explains how different types of partnerships may be set up and looks at the relationship between partners and the relationship between partnerships and outsiders. It considers the dissolution of the different types of partnerships. The chapter concludes with a discussion of the different types of companies and the separate legal personality of companies.

15. Business Organisations

2017 ◽  
Author(s):  
Lucy Jones
Keyword(s):  
Limited Liability ◽  
Limited Partnership ◽  
Legal Personality ◽  
Different Types ◽  
The Common ◽  
The Difference ◽  
Set Up ◽  
Limited Liability Partnership ◽  
The Relationship

This chapter discusses the common types of business organisations and explains the difference between unincorporated and incorporated businesses. The three types of partnership arrangements are considered, namely a general (ordinary) partnership, a limited partnership, and a limited liability partnership. The chapter includes discussion of the rules relating to partnerships under the Partnership Act 1890 and the Limited Liability Partnership Act 2000. It explains how different types of partnerships may be set up and looks at the relationship between partners and the relationship between partnerships and outsiders. It considers the dissolution of the different types of partnerships. The chapter concludes with a discussion of the different types of companies and the separate legal personality of companies.

scholarly journals IMPACT OF AUTOMOTIVE AND MOTORCYCLE SPORT ON THE ENVIRONMENT

2019 ◽  
Vol 17 (Suppl.1) ◽  
pp. 860-863
Author(s):  
Boyan Doytchev
Keyword(s):  
Future Development ◽  
Environmental Conditions ◽  
Environmental Sustainability ◽  
Internal Combustion Engines ◽  
Age Groups ◽  
Environmental Issues ◽  
Combustion Engines ◽  
Electric Motors ◽  
Different Types ◽  
Motor Sports

Automotive and motorcycle sports are motor sports in which various vehicles (serial and modified cars, motorcycles, buggies, jeeps, trucks, prototypes, etc.) compete with engines of different types (electric motors, hybrid and mostly thermal internal combustion engines - piston and partly rotary). Interest in the discuss sport are progressively increases in the years from people of different age groups. The article comments on environmental issues related to these sports and environmental recommendations for their application. The combined efforts of various institutions are needed to increase the popularity and awareness of sport that can be realized under optimal environmental conditions and does not impair its environmental sustainability. This requires an actual environmental policy and education aimed at future development in this direction.

scholarly journals Design and Vibrational Characteristic Analysis of Exhaust Manifold with Experimental Validation Using FFT Analyzer

2021 ◽  
pp. 645-665
Author(s):  
Shubham Mittal ◽  
Dr. Kiran C. More
Keyword(s):  
Internal Combustion Engines ◽  
Experimental Validation ◽  
Exhaust System ◽  
Vertical Vibration ◽  
Combustion Engines ◽  
Exhaust Manifold ◽  
Characteristic Analysis ◽  
Vibrational Characteristic ◽  
Different Types ◽  
Vibration Problems

The vibrations observed in internal combustion engines transfer to the Tail pipe via exhaust manifold. Such Vibrations cause failure of exhaust system. Two types of vibration can affect the exhaust manifold: the sonic pressure waves coming from the exhaust ports, and the vibration of the engine itself. Pressure wave vibrations are usually transparent, travelling through the exhaust system to either absorb into or cancel out in the muffler. These waves are harmonic, like the vibration of a speaker, but they are usually too minute to cause noise through component movement. Engine vibrations, on the other hand, can easily shake your complete exhaust system. Such cyclic loading of waves can cause component rattling or failure. This vibration failure occurs due to resonant frequencies occurring in defined frequency range. The ‘frequency match’ could lead to a response detrimental to the life of the structure.FEA techniques are proposed in this work to avoid resonance. Physical experimentation is proposed using FFT Analyzer. This work deals with the damping of such later mentioned vibration problems with a concept of CAE (Computer Aided Engineering). In this project we are analyzing the exhaust system under various conditions for modal (natural vibrations). Static and modal analysis of exhaust manifold has been performed using ANSYS 19 software along with experimental validation of manifold using FFT and impact hammer test. Different types of methods for reducing vibration of manifold are studied. After studying these methods and procedures for reducing a vibration, we conclude that, exhaust manifold concept 02 is more efficient by changing the geometry or adding proper stiffener for reducing vertical vibration which further increases the frequency response of component..

Calculation of Exhaust Gas Heat Produce for Ron 95, Ron97 and Vpower Racing Base Fuels use in Internal Combustion Engines

2017 ◽  
Vol 9 (3) ◽  
Author(s):  
I.B. Lias ◽  
H.B. Sharudin ◽  
M.H.B. Ismail ◽  
A.M.I.B. Mamat
Keyword(s):  
Heat Transfer ◽  
Heat Loss ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Exhaust System ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Exhaust Temperature ◽  
Different Types

The purpose of this study is to identify and analyse the calculation of exhaust gas heat produce (EGHP) in internal combustion engine (ICE) based on three types of fuel used specifically Petrol Ron 95, Petrol Ron 97 and Vpower racing base. The experimental test rig has used 1.6 CamPro Proton engine with 1561cc capacity and dynamometer. The calculation has used the basic formula of heat transfer equation and heat loss through the exhaust that included the mass flow rate of exhaust gas, specific heat of exhaust gas and temperature gradient. The exhaust temperature of ICE is generally in range from 400C to 600C and exhaust gas heat transfer affects the emissions burn-up in the exhaust system. This contributes significantly to the engine requirement. The experimental data was statistically analysed to identify the unknown parameter. High correlation of data variables can be determined based on the heat loss produced or EGHP. This also has significance by using different types of fuel in ICE.

The selection of cooling fluids for internal combustion engines operating at low temperatures

Polar Record ◽  
1955 ◽  
Vol 7 (50) ◽  
pp. 370-379
Author(s):  
E. S. Sellers
Keyword(s):  
Heat Supply ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Heat Engines ◽  
The Difference ◽  
Materials Used ◽  
Lower Temperature ◽  
Selection Of

Internal combustion engines, in common with all heat engines, derive their capacity for work from a cycle of operations which comprises the supply of heat at a high temperature followed by the rejection of heat at a much lower temperature. The difference between the two quantities of heat represents the maximum amount of energy which can be converted into useful work. In the familiar piston-type internal combustion engine, the heat supply is maintained by burning a suitable fuel in air, and heat is rejected largely in the exhaust gases. With heat engines in general, it is true that the higher the temperature of the heat supply, the greater the efficiency of the engine. There are, however, limitations to the temperature at which an engine can operate. These are imposed by the properties of the materials used in its construction, and by the necessity of maintaining satisfactory lubrication in all circumstances.

15. Inchoate offences: attempt, conspiracy and assisting and encouraging under the Serious Crime Act 2007

2018 ◽  
Author(s):  
Janet Loveless ◽  
Mischa Allen ◽  
Caroline Derry
Keyword(s):  
Great Britain ◽  
Common Law ◽  
Mens Rea ◽  
Court Decisions ◽  
Serious Crime ◽  
Different Types ◽  
Actus Reus ◽  
The Common ◽  
The Difference

This chapter examines different types of inchoate offences in Great Britain, which include attempt, conspiracy, and encouraging or assisting. It explains the conditions of liability for these offences, discusses the relevant provisions of the Serious Crime Act 2007, clarifies the general principles of these offences, and identifies their actus reus and mens rea elements. It also explores and clarifies the difference between these offences. The chapter discusses the three offences that replace the common law offence of incitement which apply to one who ‘facilitates’ another’s offence. Examples of relevant cases and analyses of court decisions in each of them are also provided.

15. Inchoate offences: attempt, conspiracy and assisting and encouraging under the Serious Crime Act 2007

2020 ◽  
pp. 681-718
Author(s):  
Janet Loveless ◽  
Mischa Allen ◽  
Caroline Derry
Keyword(s):  
Great Britain ◽  
Common Law ◽  
Mens Rea ◽  
Court Decisions ◽  
Serious Crime ◽  
Different Types ◽  
Actus Reus ◽  
The Common ◽  
The Difference

This chapter examines different types of inchoate offences in Great Britain, which include attempt, conspiracy, and encouraging or assisting. It explains the conditions of liability for these offences, discusses the relevant provisions of the Serious Crime Act 2007, clarifies the general principles of these offences, and identifies their actus reus and mens rea elements. It also explores and clarifies the difference between these offences. The chapter discusses the three offences that replace the common law offence of incitement which apply to one who ‘facilitates’ another’s offence. Examples of relevant cases and analyses of court decisions in each of them are also provided.

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