scholarly journals Current Trends in Automotive Lightweighting Strategies and Materials

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6631
Author(s):  
Frank Czerwinski
Keyword(s):  
Structural Engineering ◽  
Internal Combustion Engines ◽  
Material Design ◽  
Combustion Engines ◽  
Matrix Composites ◽  
Design Concepts ◽  
Current Trends ◽  
Car Racing ◽  
And Performance ◽  
Aluminum And Magnesium Alloys

The automotive lightweighting trends, being driven by sustainability, cost, and performance, that create the enormous demand for modern lightweight materials and design concepts, are assessed as a part of the circular economy solutions in modern mobility and transportation. The current strategies that aim beyond the basic weight reduction and cover also the structural efficiency as well as the economic and environmental impact are explained with an essence of guidelines for materials selection with an eco-friendly approach, substitution rules, and a paradigm of the multi-material design. Particular attention is paid to the metallic alloys sector and progress in global R&D activities that cover the “lightweight steel”, conventional aluminum, and magnesium alloys, together with well-established technologies of components manufacturing and future-oriented solutions, and with both adjusting to a transition from internal combustion engines to electric vehicles. Moreover, opportunities and challenges that the lightweighting creates are discussed with strategies of achieving its goals through structural engineering, including the metal-matrix composites, laminates, sandwich structures, and bionic-inspired archetypes. The profound role of the aerospace and car-racing industries is emphasized as the key drivers of lightweighting in mainstream automotive industry.

Impact of a Holistic Turbocharger Model in the Prediction of Engines Performance in Transient Operation and in Steady State With LP-EGR

2018 ◽  
Author(s):  
José Ramón Serrano ◽  
Francisco José Arnau ◽  
Luis Miguel García-Cuevas González ◽  
Alejandro Gómez-Vilanova ◽  
Stephane Guilain
Keyword(s):  
Steady State ◽  
Internal Combustion Engines ◽  
Inlet Temperature ◽  
Detailed Calculation ◽  
Combustion Engines ◽  
Reciprocating Engine ◽  
Steady State Operation ◽  
And Performance ◽  
Source Of Information ◽  
Optimization And Performance

Turbocharged engines are the standard powertrain type of internal combustion engines for both spark ignition and compression ignition concepts. Turbochargers modeling traditionally rely in look up tables based on turbocharger manufacturer provided maps. These maps as the only secure source of information. They are used both for the matching between reciprocating engine and the turbocharger and for the further engine optimization and performance analysis. In the last years have become evident that only these maps are not being useful for detailed calculation of variables like after-treatment inlet temperature (turbine outlet), intercooler inlet temperature (compressor outlet) and engine BSFC at low loads. This paper shows a comprehensive study that quantifies the errors of using just look up tables compared with a model that accounts for friction losses, heat transfer and gas-dynamics in a turbocharger and in a conjugated way. The study is based in an Euro 5 engine operating in load transient conditions and using a LP-EGR circuit during steady state operation.

scholarly journals Experimental study on noise reduction and performance enhancement for internal combustion engines

2020 ◽  
Vol 318 ◽  
pp. 01014
Author(s):  
Ioan Radu Şugar ◽  
Mihai Banica
Keyword(s):  
Experimental Study ◽  
Combustion Chamber ◽  
Noise Reduction ◽  
Fuel Consumption ◽  
Internal Combustion Engines ◽  
Performance Enhancement ◽  
Ceramic Materials ◽  
Combustion Engines ◽  
Large Cities ◽  
And Performance

As the number of cars increases and large cities become more and more crowded, noise reduction becomes more and more important. The decrease of the fuel consumption and the increase of power to the same cylindrical capacity are always current topics. This paper’s aim is to bring a contribution to solving these problems. The proposed solution consists in the use of ceramic materials in the design of the combustion chamber.

Tri-Axial Force Measurements on the Cylinder of a Motored SI Engine Operated on Lubricants of Differing Viscosity

2010 ◽  
Vol 132 (9) ◽  
Author(s):  
Bryan O’Rourke ◽  
Donald Radford ◽  
Rudolf Stanglmaier
Keyword(s):  
Axial Force ◽  
Internal Combustion Engines ◽  
Axial Direction ◽  
Internal Combustion ◽  
Mechanical Efficiency ◽  
Combustion Engines ◽  
Friction Characteristics ◽  
Colorado State University ◽  
And Performance ◽  
Lubricant Viscosity

Friction is a determining factor in the efficiency and performance of internal combustion engines. Losses in the form of friction work typically account for 10–20% of an engine’s output. Improvements in the friction characteristics of the power cylinder assembly are essential for reducing total engine friction and improving the mechanical efficiency of internal combustion engines. This paper describes the development and implementation of a new concept of the “floating liner” engine at Colorado State University that allows 0.5 crank angle deg resolved measurement of the forces on the cylinder along three axes—in the axial direction, the thrust direction, and along the wrist pin. Three different lubricants with differing properties were tested to observe the friction characteristics of each. The experimental results showed that the floating liner engine was able to resolve changes in friction characteristics coinciding with changes in lubricant viscosity and temperature. The axial force increases at TDC and BDC were observed as lubricant viscosity was decreased and larger amounts of mixed and boundary lubrication began to occur. For each test the axial friction force data was used to calculate total cycle friction work. The thrust and off-axis (wrist pin direction) forces are discussed under the same circumstances.

scholarly journals Development of a virtual bench for the analysis of the physical processes of internal combustion engines

2021 ◽  
Vol 2102 (1) ◽  
pp. 012013
Author(s):  
J P Rojas Suárez ◽  
J A Pabón León ◽  
M S Orjuela Abril
Keyword(s):  
Heat Release ◽  
Fuel Consumption ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Maximum Deviation ◽  
Pressure Curve ◽  
Combustion Engines ◽  
Operating Characteristics ◽  
And Performance

Abstract Currently, internal combustion engines face the challenge of reducing fuel consumption and reducing polluting emissions due to their significant impact on the environment. Therefore, it is necessary to use tools that allow us to evaluate the operating characteristics of this type of thermal machines. In the present investigation, the development of a virtual bench was proposed for the analysis of the behavior and performance characteristics of an internal combustion engine for use as a learning tool in higher education students. From the results obtained, it could be demonstrated that the pressure curves of the combustion chamber and the rate of heat release obtained by means of the virtual bench presented a high concordance with the experimental records. The maximum deviation obtained was 5% and 15% for the pressure curve and the heat release rate. Comparing the performance parameters of the brake specific fuel consumption of the engine and energy efficiency, a maximum deviation of 2.96% was shown compared to the real engine. In general, the virtual development bank can describe the behavior of the engine, allowing the characterization of physical phenomena, as well as evaluating the effect of auxiliary technologies such as turbo-compression systems.

Tri-Axial Force Measurements on the Cylinder of a Motored SI Engine Operated on Lubricants of Differing Viscosity

2009 ◽  
Author(s):  
Bryan O’Rourke ◽  
Donald Radford ◽  
Rudolf Stanglmaier
Keyword(s):  
Axial Force ◽  
Internal Combustion Engines ◽  
Axial Direction ◽  
Internal Combustion ◽  
Mechanical Efficiency ◽  
Combustion Engines ◽  
Friction Characteristics ◽  
Colorado State University ◽  
And Performance ◽  
Lubricant Viscosity

Friction is a determining factor in the efficiency and performance of internal combustion engines. Losses in the form of friction work typically account for 10–20% of an engine’s output. Improvements in the friction characteristics of the power cylinder assembly are essential for reducing total engine friction and improving the mechanical efficiency of internal combustion engines. This paper describes the development and implementation of a new concept of the ‘floating liner’ engine at Colorado State University that allows 0.5 crank angle degree resolved measurement of the forces on the cylinder along 3 axes — in the axial direction, the thrust direction, and along the wrist pin. Three different lubricants with differing properties were tested to observe the friction characteristics of each. Experimental results showed that the floating liner engine was able to resolve changes in friction characteristics coinciding with changes in lubricant viscosity and temperature. Axial force increases at TDC and BDC were observed as lubricant viscosity was decreased and larger amounts of mixed and boundary lubrication began to occur. For each test the axial friction force data was used to calculate total cycle friction work. The thrust and off-axis (wrist pin direction) forces are discussed under the same circumstances.

Advanced Techniques for Engine Research and Design

1989 ◽  
Vol 203 (3) ◽  
pp. 169-183 ◽  
Author(s):  
C C J French
Keyword(s):  
High Speed ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Recent Past ◽  
And Performance ◽  
Research And Design ◽  
Speed Computer ◽  
Made In

This paper discusses technical improvements that have been made to internal combustion engines in the recent past. It then goes on to show that, with the availability of the high-speed computer, great possibilities exist for many more advances to be made in design and performance.

scholarly journals Fundamentals of design and performance matching of scrubbers and ship diesel installations

2021 ◽  
pp. 67-74
Author(s):  
А.А. Иванченкο ◽  
В.В. Шарик ◽  
С.В. Митрашов
Keyword(s):  
Internal Combustion Engines ◽  
Experimental Studies ◽  
Combustion Engines ◽  
Short Period ◽  
Wide Range ◽  
System Components ◽  
And Performance ◽  
Special Control ◽  
Efficiency Consideration ◽  
Research Analysis

Отмечается, что вступление в силу в 2015году норм на содержание серы в морских топливах 0,1 % для особых районов контроля и в 2020 г. 0,5% за их пределами привело к росту интереса судовладельцев к системам абсорбционной очистке отработавших газов с использованием скруббера. Соответственно в короткий период времени различными производителями были предложены судовладельцам различные модели систем с рассматриваемой технологией в основе. Это требует анализа существующего опыта проектирования и выполнения дополнительных исследований как по устранению влияния систем очистки на экономичность судовой дизельной установкой, так и по повышению их эффективности. Рассмотрение этих задач является целью настоящего исследования. В его основу положен анализ как собственных исследований авторов, так и результаты расчетных и экспериментальных исследований, выполненных с их участием. В отличии от ранее выполненных работ в настоящей статье рассматриваются практические вопросы проектирования и согласования элементов систем очистки с характеристиками дизельных установок. Рассмотрены взаимосвязи элементов абсорбционных систем очистки с системами судна и их двигателей. It is observed that the entry into force in 2015. Marine fuels new sulfur standards of 0.1% for special control areas and in 2020, 0.5% outside of them have increased interests of ship owners in the systems of absorption cleaning of exhaust gases by running the scrubber. Accordingly, in a short period, various manufacturers offered to the ship-owners wide range of systems configurations based on the technology under consideration. This requires an analysis of the existing design experience and the implementation of technical studies, both to eliminate the effect of cleaning systems on the efficiency of a ship diesel installation and to increase their efficiency. Consideration of these tasks is the purpose of this research. Its fundamentals on the authors' own research analysis and on the results of computational and experimental studies carried out with their participation. In contrast to the previously performed work, this article discusses the practical issues of the design and coordination of scrubber system components with the characteristics of diesel installations. The interaction of absorption systems elements with the ship's systems and internal combustion engines is considered.

REVIEW OF CONVENTIONAL AIR CONDITIONING SYSTEM FOR INTERNAL COMBUSTION ENGINES

2013 ◽  
Vol 21 (02) ◽  
pp. 1330001 ◽  
Author(s):  
JAE-HYEONG SEO ◽  
HYUNG-JIN KIM ◽  
KWANG-JONG JUNG ◽  
DAE-WAN KIM ◽  
JEONG-KUK YEOM ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Air Conditioning System ◽  
Automotive Air Conditioning ◽  
Automotive Air Conditioning System ◽  
Experimental Works ◽  
And Performance ◽  
Effective Design

In spite of the increase of the concern on electric vehicles (which is called green cars) and electrically driven automotive air conditioning system, the conventional automotive air conditioning system for internal combustion engines has been still investigated widely due to the realistic consideration. This paper is intended to include many automotive air conditioning system articles published in 1997 to 2013. This review, although extensive cannot include every paper; some selection is necessary. Reviewed papers herein are related to the research and development on effective design and performance improvement for the automotive air conditioning system and components, including theoretical, numerical, analytical and experimental works. Therefore, a number of published articles about the automotive air conditioning system, which contain the belt-driven compressors, heat exchangers and refrigerants, were considered. Many researches have focused on improving the efficiency of automotive air conditioning system to decrease the usage rate of the internal combustion engines.

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