Criteria

Text:
Display:

Results

Viewing 1 to 30 of 6464
2015-07-27 ...
  • July 27-29, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
  • November 9-11, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
The need to control emissions and maintain fuel economy is driving the use of advanced turbocharging technology in both diesel and gasoline engines. As the use of diesel engines in passenger car gasoline and diesel engines increases, a greater focus on advanced turbocharging technology is emerging in an effort to reap the benefits obtained from turbocharging and engine downsizing. This seminar covers the basic concepts of turbocharging of gasoline and diesel engines (light and heavy duty), including turbocharger matching and charge air and EGR cooling, as well as associated controls.
2015-07-20 ...
  • July 20-21, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
The purpose of this course is to provide an overview of the factors in the cylinder kit assembly of natural gas, gasoline, and diesel engines that affect oil consumption, ring and cylinder bore wear, and blow-by. This course includes background and the evolution of designs and materials currently employed in modern engines as well as providing an overview of computer models, designs, and material systems that can be utilized to optimize the performance of new engines. An overview of the trends in materials and designs employed in U.S., European and Japanese engines will be presented.
2015-06-16 ...
  • June 16-17, 2015 (8:30 a.m. - 4:30 p.m.) - Charlotte, North Carolina
  • August 24-25, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
  • December 8-9, 2015 (8:30 a.m. - 4:30 p.m.) - Norwalk, California
Training / Education Classroom Seminars
As diesel engines become more popular, a fundamental knowledge of diesel technology is critical for anyone involved in the diesel engine support industry. This course will explain the fundamental technology of diesel engines starting with a short but thorough introduction of the diesel combustion cycle, and continue with aspects of engine design, emission control design, and more. An overview of developing technologies for the future with a comprehensive section on exhaust aftertreatment is also included. The text, Diesel Emissions and Their Control, authored by Magdi Khair and W. Addy Majewski is included with the seminar.
2015-06-15
Technical Paper
2015-01-2254
WenbIn Shangguan
The driving pulley in the Engine Front End Accessory Drive System (EFEAD) is usually used as a torsional vibration damper for the crankshaft. Although the crankshaft torsional vibrations are dampened, the torsional vibration is absorbed by the inertia ring of the driving pulley and then is transmitted to the EFEAD. The isolation pulley is a new device and is to reduce the belt tension fluctuation by isolating the belt transmission from the crankshaft torsional vibrations. In the isolation pulley, there are two inertia rings, one is used to damp the crankshaft vibration and another one is to drive the EFEAD. The purpose of this paper is to study design method for isolation pulley to reduce the EFEAD vibrations. An EFEAD with five-pulley system and isolation pulley is taken as studying example and a non-linear model is established to predict the dynamic response of the pulleys, tensioner motion and pulley slips.
2015-06-03 ...
  • June 3-5, 2015 (2 Sessions) - Live Online
  • December 9-11, 2015 (2 Sessions) - Live Online
Training / Education Online Web Seminars
Turbocharging is already a key part of heavy duty diesel engine technology. However, the need to meet emissions regulations is rapidly driving the use of turbo diesel and turbo gasoline engines for passenger vehicles. Turbocharged diesel engines improve the fuel economy of baseline gasoline engine powered passenger vehicles by 30-50%. Turbocharging is critical for diesel engine performance and for emissions control through a well designed exhaust gas recirculation (EGR) system. In gasoline engines, turbocharging enables downsizing which improves fuel economy by 5-20%.
2015-05-15
Book
This is the electronic format of the Journal.
2015-05-01
Journal Article
2015-01-9081
Sakthinathan Ganapathy Pandian, Srivathsan Puzhuthivakkam Rengarajan, Terrin P Babu, Vignesh Natarajan, Harikrishnan Kanagasabesan
Abstract Functionally Graded Thermal Barrier Coatings (FG-TBC) increases the performance of high temperature components in gasoline engines by decreasing the thermal conductivity and increasing the unburned charge oxidation in the flame quenching area with the increase in temperature near the entrance of the crevice volume between the piston and the liner during the compression and the early part of the expansion strokes. In this study, a 3-D finite element steady state thermal and structural analysis are carried out on both uncoated and functionally graded NiCrAlY/YSZ/Al2O3 coated gasoline engine piston using a commercial code, namely ANSYS. The effects of coating on the thermo mechanical behaviours of the piston are investigated. It has been shown that the maximum surface temperature of the ceramic coated piston is improved approximately by 7% for the Al-Si alloy.
2015-04-23
Event
This session covers the Power Cylinder: piston, piston rings, piston pins, and connecting rods. The papers include information on reducing friction and increasing fuel economy, improving durability by understanding wear, and decreasing oil consumption and blow-by.
2015-04-23
Event
In this session, research and development of small engine technology, including two-stroke cycle, will be covered. Topics include combustion, scavenging, emissions, fuel systems, control, and NVH.
2015-04-22
Event
This session will cover conceptual, modeling and experimental studies relating to advanced turbochargers/superchargers and advanced boosting systems to achieve increased power density, better fuel economy, and reduced emissions.
2015-04-22
Event
This session will cover conceptual, modeling and experimental studies relating to advanced turbochargers/superchargers and advanced boosting systems to achieve increased power density, better fuel economy, and reduced emissions.
2015-04-21
Event
This sub-session covers zero-dimensional, one-dimensional, and quasi-dimensional models for simulation of SI and CI engines as a plant in engine controls
2015-04-17
Video
Inside the turbocharger of your family car is a special material that was also used in the skin of NASA's X-15 rocket plane. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at Inconel, a material commonly used in turbocharger rotors.
2015-04-14
Collection
This technical paper collection covers conceptual, modeling and experimental studies relating to advanced turbochargers/superchargers and advanced boosting systems to achieve increased power density, better fuel economy, and reduced emissions.
2015-04-14
Technical Paper
2015-01-1121
Enrico Galvagno, Mauro Velardocchia, Alessandro Vigliani, Antonio Tota
Abstract This paper investigates the torsional dynamic behaviour of a Dual Mass Flywheel (DMF) both numerically and experimentally. First, the experimental setup is described, followed by a mathematical description in the frequency domain of the mechanical system under test, using a lumped parameter model. An analytical expression for the frequency response function describing the rotational dynamics is derived and compared with experimental data. Sine sweep tests are used to characterise the system, imposing constant amplitude excitation, i.e. the torque applied to the engine side of the DMF. Moreover a method for enhancing the dynamic performance of the electric motor torque control is suggested in order to use it as a torsional shaker.
2015-04-14
Technical Paper
2015-01-1075
Muhammad Ahmar Zuber, Wan Mohd Faizal Wan Mahmood, Zambri Harun, Zulkhairi Zainol Abidin, Antonino La Rocca, Paul Shayler, Fabrizio Bonatesta
Abstract The focus of this study is to analyse changes in soot particle size along the predicted pathlines as they pass through different in-cylinder combustion histories obtained from Kiva-3v CFD simulation with a series of Matlab routines. 3500 locations representing soot particles were selected inside the cylinder at 8° CA ATDC as soot was formed in high concentration at this CA. The dominant soot particle size was recorded within the size range of 20-50 nm at earlier CA and shifted to 10-20 nm after 20° CA ATDC. Soot particle quantities reduce sharply until 20° CA ATDC after which they remain steady at around 1500 particles. Soot particles inside the bowl region tend to stick to the bowl walls and those remaining in the bowl experience an increase in size. Soot particles that move to the upper bowl and squish regions were observed to experience a decrease in size.
2015-04-14
Technical Paper
2015-01-1300
Shuanlu Zhang, Changlu Zhao, ZhenFeng Zhao, Dong Yafei, Fukang Ma
Abstract The hydraulic free piston engine is a complex mechanical-electro-liquid system, in order to simplify the complex system of the single hydraulic free piston engine, a new method for the driving of hydraulic free piston engine is proposed. Hydraulic differential drive achieves the compression stroke automatically rather than special recovery system. The structure and principle of hydraulic differential drive free-piston engine are analyzed and the mathematical model is established based on the piston force analysis and the hydraulic system working principle. In addition, the control strategy of this novel hydraulic driving engine is also introduced. Finally, the transient results of dynamics are obtained through simulation. Then we compare our results to the ones from the hydraulic free piston engine made by the company Innas.
2015-04-14
Technical Paper
2015-01-1302
Alexander Oliva, Stefan Held, Anatoli Herdt, Georg Wachtmeister
Abstract Developing piston assemblies for internal combustion engines faces the conflicting priorities of blow-by, friction, oil consumption and wear. Solving this conflict consists in finding a minimum for all these parameters. This optimization can only be successful if all the effects involved are understood properly. In this paper only blow-by and its associated flow paths for a diesel engine in part load operating mode are part of a detailed numerical investigation. A comparison of the possibilities to do a CFD analysis of this problem should show why the way of modeling described here has been picked. Further, the determination of the complex geometry, which results in a challenging set of calculations, is described. Besides the constraints for temperature and pressure, a meshing method for the creation of a dynamic mesh that is capable of describing the movement of all three rings of the piston ring pack simultaneously is also explained.
2015-04-14
Journal Article
2015-01-1335
Matthew W. Dickinson, Nathalie Renevier, John Calderbank
For decades the operational dynamics of the compression ring during operation, have been subject to debate [1, 2, 3, 4, 5, 6, 7]. A complex computer simulation, using Design Of Experiments (DOE) methodology, was developed to study the effect of the compression ring rotation during running-in stages. Response Surface (RS) has been used to optimize ring displacement, as function of ring mass, width and radius. The optimised surface response has been compared to used compression rings and has shown a 2% variation between calculated and measured values.
2015-04-14
Technical Paper
2015-01-0681
Yuki Ono, Kenji Matsumoto
Abstract The reciprocating frictional test is a common approach for screening the materials of the piston and sleeve of an automobile engine. The frictional speed of this test is, however, limited mainly by the vibration of test apparatus due to the absence of damping factors in engines. Considering that the frictional velocity between the piston and sleeve reaches around 20 m/s, common test conditions at less than 2 m/s are not sufficient to understand the real phenomena at a frictional interface. We therefore developed a high-speed reciprocating test apparatus that can operate at a much higher speed range and examined two materials used for piston rings and sleeves. For the piston ring material, nitrided SUS440C was used. Plates were made of centrifugal cast iron FC250 or cast aluminum AC2B, which were coated with Nikasil. The experimental results showed that the lubrication regimes of the two plate materials were different even at the same reciprocating speeds.
2015-04-14
Journal Article
2015-01-0495
Shohei Mikami, Georgi Chakmakov
Abstract Designing a lightweight and durable engine is universally important from the standpoints of fuel economy, vehicle dynamics and cost. However, it is challenging to theoretically find an optimal solution which meets both requirements in products such as the cylinder head, to which various thermal loads and mechanical loads are simultaneously applied. In our research, we focused on “non-parametric optimization” and attempted to establish a new design approach derived from the weight reduction of a cylinder head. Our optimization process consists of topology optimization and shape optimization. In the topology optimization process, we explored an optimal structure with the theoretically-highest stiffness in the given design space. This is to provide an efficient structure for pursuing both lightweight and durable characteristics in the subsequent shape optimization process.
2015-04-14
Technical Paper
2015-01-0523
Marco Maurizi, Roland Lochmann
Abstract In modern car engines, the oscillating masses, the inertia forces of the moving engine parts has to be kept as low as possible. Small oscillating masses are not only the basis for the engine smoothness; they also have a great influence on the reliability and life of the components. The smaller oscillating mass in the crank mechanism minimizes, the weaker the vibrations and reduces friction and wear of the parts. The contribution of the piston pin to the oscillating mass can be between ten and thirty percent. Mass reduction of the piston pin has a corresponding large effect. In the newly developed MAHLE composite piston pin, an aluminum core is pressed in a steel sleeve. This enables a weight reduction in the piston pin up to twenty percent for gasoline engines and up to thirty percent for diesel passenger car engines. As the production of piston pins should be kept simple and economical, the new composite piston pin utilizes a forming process for its manufacturing.
2015-04-14
Technical Paper
2015-01-0505
Miguel Angel Reyes Belmonte, Colin D. Copeland, Drummond Hislop, George Hopkins, Adrian Schmieder, Scott Bredda, Sam Akehurst
Abstract Pressure and temperature levels within a modern internal combustion engine cylinder have been pushing to the limits of traditional materials and design. These operative conditions are due to the stringent emission and fuel economy standards that are forcing automotive engineers to develop engines with much higher power densities. Thus, downsized, turbocharged engines are an important technology to meet the future demands on transport efficiency. It is well known that within downsized turbocharged gasoline engines, thermal management becomes a vital issue for durability and combustion stability. In order to contribute to the understanding of engine thermal management, a conjugate heat transfer analysis of a downsized gasoline piston engine has been performed. The intent was to study the design possibilities afforded by the use of the Selective Laser Melting (SLM) additive manufacturing process.
2015-04-14
Technical Paper
2015-01-0558
Xiaobei Cheng, Xin Wang, Yang Ming, Zhang Hongfei, Ran Gao
Abstract With a focus on a heavy diesel engine, complete set of multi-field coupling methodology aimed at analyzing and optimizing for fatigue-strength of cylinder head is proposed. A detailed model of the engine consisting of both the coolant galleries and the surrounding metal components is employed in both fluid-dynamic and structural analyses to accurately mimic the influence of the thermo-mechanical load on the cylinder head and block structural reliability. This model carries out several simulating experiments like 3-dimensional CFD of in-cylinder combustion and engine cooling jacket, simulation of cylinder head temperature field which use fluid-structure interaction, stress and strain analysis under thermal-mechanical coupling conditions and high cycle fatigue analysis. In order to assess a proper CFD setup useful for the optimization, the experimentally measured temperature distribution within the engine head is compared to the CFD forecasts.
2015-04-14
Technical Paper
2015-01-0548
Andrew Halfpenny, Robin Anderson, Xiaobin Lin
Abstract This paper reviews the topic of Thermo-Mechanical Fatigue (TMF) as applied to automotive components such as cylinder heads, pistons, manifolds, turbochargers and exhaust components. The paper starts by looking at the physical influence of temperature on the microscopic failure of materials, in particular concentrating on the mechanisms of creep, fatigue, oxidation and their interactions. Finite Element Analysis (FEA) techniques suitable for high-temperature environments are discussed briefly, in particular the applications of elastic, elastic-plastic or elastic-viscoplastic analyses. Finally, methods for high-temperature fatigue and creep-fatigue based on the Chaboche approach are reviewed. The paper concludes with a review of laboratory tests on several materials at elevated temperatures under combined creep and fatigue conditions. Two case studies are then presented on a turbocharger housing and an exhaust-gas recirculation valve housing.
2015-04-14
Technical Paper
2015-01-1249
Jinli Wang, Fuyuan Yang, Minggao Ouyang
Abstract There is increasing demand for engine diagnostic and control with in-cylinder pressure signal. However, the application of cylinder pressure sensors are restricted by the high cost of the sensor. Another possible way for engine combustion state estimation is by processing of instantaneous crankshaft speed signal, but it is limited by the precision and complexity of the algorithm. It could be a solution by processing one cylinder pressure signal in combination with a crankshaft speed signal. The indicated torque could be estimated through engine speed processing and also from the measure cylinder pressure for the reference cylinder. Measurement results from experiments show that the indicated torque error traces of different cylinder are similar in shape. According to this assumption, the reference cylinder with cylinder pressure signal available can serve as both a parameter calibration information source and an error reduction measure.
2015-04-14
Technical Paper
2015-01-1269
Ming Huo, Yuexin Huang, Peter Hofbauer
Abstract A comprehensive investigation on the impact of piston design on scavenging and combustion in an opposed- piston, opposed-cylinder (OPOC) two-stroke engine is carried out and presented in this paper. Two-stroke engines, in general, have superior power densities and brake thermal efficiencies. Compared with opposed-piston (OP) engines, the OPOC architecture comprises only one crankshaft instead of two, and all the forces generated on the piston go to this one crankshaft via a common bearing, thus making the engine structure inherently simple, lightweight, compact and efficient. Due to the piston motion of the OPOC engine, two opposing injectors were mounted at the center of the cylinder wall for each cylinder. This unique feature posed challenges on air entrainment for air/fuel mixing because of the inherent limited space for injection spreading angle near top-dead-center (TDC).
2015-04-14
Journal Article
2015-01-1288
Marcello Canova, Massimo Naddeo, Yuxing Liu, Junqiang Zhou, Yue-Yun Wang
Abstract Engine downsizing and super/turbocharging is currently the most followed trend in order to reduce CO2 emissions and increase the powertrain efficiency. A key challenge for achieving the desired fuel economy benefits lies in optimizing the design and control of the engine boosting system, which requires the ability to rapidly sort different design options and technologies in simulation, evaluating their impact on engine performance and fuel consumption. This paper presents a scalable modeling approach for the characterization of flow and efficiency maps for automotive turbochargers. Starting from the dimensional analysis theory for turbomachinery and a set of well-known control-oriented models for turbocharged engines simulation, a novel scalable model is proposed to predict the flow and efficiency maps of centrifugal compressors and radial inflow turbines as function of their key design parameters.
2015-04-14
Technical Paper
2015-01-1287
Silvia Marelli, Giulio Marmorato, Massimo Capobianco, Andrea Rinaldi
In the last few years, the effect of diabatic test conditions on compressor performance maps has been widely investigated leading some authors to propose different correction models. The accuracy of performance maps constitutes the basis of the turbocharger matching with the engine, for which 1D procedures are more and more adopted. The classical quasi-steady approach generally used is based on the employment of compressor and turbine characteristic maps assuming adiabatic turbocharger conditions. The aim of the paper is to investigate the effect of heat transfer phenomena on the experimental definition of turbocharger maps, focusing on compressor performance. This work was developed within a collaboration between the Polytechnic School of the University of Genoa and CRITT M2A. The compressor steady flow behavior was analyzed through tests performed on different test rigs operating at the University of Genoa and at CRITT M2A, under various heat transfer conditions.
Viewing 1 to 30 of 6464

Filter

  • Range:
    to:
  • Year: