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2015-06-26 ...
  • June 26, 2015 (12:30 p.m. - 4:30 p.m.) - Grand Rapids, Michigan
Training / Education Classroom Seminars
Most muffler design in the automotive industry is accomplished by using "cut-and-try" methods that rely on what has worked in the past and/or extensive full-scale testing on engines for validation. New computer software aimed at muffler design can shorten the design cycle and yield more effective results. This four hour seminar provides an introduction to the behavior of mufflers and silencers including a description of the two-port approach to muffler design. This seminar covers the acoustic simulation of muffler and silencer systems and the use of experimental methods to measure muffler performance.
2015-04-23
Event
The spectrum of papers solicited for this session reflect the truly multi-disciplinary nature of the field of Multi-Dimensional Engine Modeling. The session covers advances in the development and application of models and tools involved in multi-dimensional engine modeling. This includes advances in chemical kinetics, combustion and spray modeling, turbulence, heat transfer, mesh generation, and approaches targeting improved computational efficiency. Papers employing multi-dimensional modeling to gain a deeper understanding of processes related to turbulent transport, transient phenomena, and chemically reacting, two-phase flows are also encouraged.
2015-04-23
Event
The spectrum of papers solicited for this session reflect the truly multi-disciplinary nature of the field of Multi-Dimensional Engine Modeling. The session covers advances in the development and application of models and tools involved in multi-dimensional engine modeling. This includes advances in chemical kinetics, combustion and spray modeling, turbulence, heat transfer, mesh generation, and approaches targeting improved computational efficiency. Papers employing multi-dimensional modeling to gain a deeper understanding of processes related to turbulent transport, transient phenomena, and chemically reacting, two-phase flows are also encouraged.
2015-04-22
Event
The spectrum of papers solicited for this session reflect the truly multi-disciplinary nature of the field of Multi-Dimensional Engine Modeling. The session covers advances in the development and application of models and tools involved in multi-dimensional engine modeling. This includes advances in chemical kinetics, combustion and spray modeling, turbulence, heat transfer, mesh generation, and approaches targeting improved computational efficiency. Papers employing multi-dimensional modeling to gain a deeper understanding of processes related to turbulent transport, transient phenomena, and chemically reacting, two-phase flows are also encouraged.
2015-04-22
Event
The spectrum of papers solicited for this session reflect the truly multi-disciplinary nature of the field of Multi-Dimensional Engine Modeling. The session covers advances in the development and application of models and tools involved in multi-dimensional engine modeling. This includes advances in chemical kinetics, combustion and spray modeling, turbulence, heat transfer, mesh generation, and approaches targeting improved computational efficiency. Papers employing multi-dimensional modeling to gain a deeper understanding of processes related to turbulent transport, transient phenomena, and chemically reacting, two-phase flows are also encouraged.
2015-04-22
Event
This session covers transmission and driveline modeling, including topics related to transmission hardware, software, and system integration.
2015-04-22
Event
This session covers transmission and driveline modeling, including topics related to transmission hardware, software, and system integration.
2015-04-21
Event
Developments of experimental and theoretical schemes in various engineering disciplines are accompanied with growing complexity. This complexity can be attributed to extensive acquisition of measured data as well as higher order levels of computational analysis. One significant feature of this complexity is the presence of uncertainty, which is inherent in both experimental and analytical engineering schemes. This session is intended to bring a collection of papers on current methods and new directions in treating the presence of uncertainty in: 1) data acquisition and analysis and 2) in the mechanical systems. Papers are specifically sought in new analytical and data quality assurance methods for treating uncertainty.
2015-04-21
Event
The spectrum of papers solicited for this session reflect the truly multi-disciplinary nature of the field of Multi-Dimensional Engine Modeling. The session covers advances in the development and application of models and tools involved in multi-dimensional engine modeling. This includes advances in chemical kinetics, combustion and spray modeling, turbulence, heat transfer, mesh generation, and approaches targeting improved computational efficiency. Papers employing multi-dimensional modeling to gain a deeper understanding of processes related to turbulent transport, transient phenomena, and chemically reacting, two-phase flows are also encouraged.
2015-04-21
Event
The spectrum of papers solicited for this session reflect the truly multi-disciplinary nature of the field of Multi-Dimensional Engine Modeling. The session covers advances in the development and application of models and tools involved in multi-dimensional engine modeling. This includes advances in chemical kinetics, combustion and spray modeling, turbulence, heat transfer, mesh generation, and approaches targeting improved computational efficiency. Papers employing multi-dimensional modeling to gain a deeper understanding of processes related to turbulent transport, transient phenomena, and chemically reacting, two-phase flows are also encouraged.
2015-04-21
Event
Papers cover exhaust aftertreatment system models, as well as their validation and application. Technologies encompassed include DOC, HC Trap, DPF, GPF, LNT, TWC, SCR, SCRF, ammonia oxidation catalysts, hybrid or combined catalysts, urea-water solution spray dynamics, and mixture non-uniformity. Modeling aspects range from fundamental, 3D models of individual components to system level simulation, optimization, variation, degradation, and control.
2015-04-21
Event
Meeting Reliability, Design, quality and safety requirements for electrical/electronic systems becomes more challenging every year as E/E content, complexity, time-to-market and globalization pressures increase. This session focuses on intelligent practices for achieving high reliability. New approaches and techniques for integrating robust design and robustness validation into the mainstream global automotive electronics product development and manufacturing processes are discussed
2015-04-21
Event
Researchers and engineers involved in development in simulation and digital modeling of manufacturing process. Studies in wear patterns, failure modes, extending life in modern tools, optimal layout of tools are also welcome.
2015-04-14
Technical Paper
2015-01-1718
Jan Macek, Zdenek Zak, Oldrich Vitek
Aiming at high low-end ICE torque with turbocharged and massively downsized engines revitalized high pulsation exhaust manifolds, which improve exhaust gas energy transfer especially while engine runs at reduced speed. The lack of turbine maps if twin scroll or divided scroll is used for radial turbine stator entry is well-known. The remedy is not simple. The measurements of maps for twin-entry turbines are costly and time consuming. Any lookup-map based interpolation suffers from lack of physical fundamentals, since the mixing processes take place inside a turbine at governing pressure differences significantly different from turbine inlet pressures. The paper describes a way to a 1-D central streamline model of a radial turbine flow suitable for twin-scroll description based on approximation to real physics of flow mixing and energy transformation.
2015-04-14
Technical Paper
2015-01-1719
Daniel Pachner, Lukas Lansky, David Germann, Markus Eigenmann
Turbocharger maps measured on the gas stand are commonly used to represent turbine and compressor performance. The maps are useful source of information for mean value modeling, engine calibration optimization, virtual sensing and feedback control design. For some tasks, representing the maps by fitted functional forms can be more convenient than using the interpolation of the map data directly. The functional representation usually allows for wider extrapolation ranges and more reliable application of numerical optimization methods. Several functional forms have been proposed for compressor map modeling, often based on empirical polynomial models. However, most successful models are based rational polynomials of dimensionless head and flow parameters (Winkler, Jensen). The turbines are usually modeled as orifices, or orifices with variable cross-section in case of variable nozzle (VNT) turbines.
2015-04-14
Technical Paper
2015-01-1716
Oldrich Vitek, Jan Macek, Jiri Klima, Martin Vacek
The proposed paper deals with an optimization of a highly-turbocharged large-bore gas SI engine. Only steady state operation (constant engine speed and load) is considered. The results are obtained by means of simulation using complex 0-D/1-D engine model including the control algorithm. Different mixture composition concepts are considered to satisfy TA Luft norm (different levels of TA Luft NOx limit are evaluated) – fresh air and external cooled EGR is supposed to be the right way while optimal EGR level is to be found. Considering EGR circuit, 5 different layouts are tested to select the best desing. As the engine control is relatively complex (2-sage turbocharger group, external EGR, compressor blow-by, controlled air excess), 5 different control means of boost pressure were considered. Each variant (based on above mentioned possibilities) is optimized in terms of compressor/turbine size (swallowing capacity) to obtain the best possible BSFC.
2015-04-14
Technical Paper
2015-01-1717
Li-Chun Chien, Matthew Younkins, Mark Wilcutts
Dynamic skip fire is a control method for internal combustion engines in which engine cylinders are selectively fired or skipped to meet driver torque demand. Each cylinder is operated at or near its best thermal efficiency and flexible control of acoustic and vibrational excitations is achieved. In this type of engine operation, fueling, and possibly intake and exhaust valves of each cylinder are actuated on an individual firing opportunity basis. The implementation and benefits of this system have been described in several previous papers. This paper describes engine thermofluid modeling for this type of operation for purposes of air flow and torque prediction. Airflow dynamic and thermodynamic results for skip fire engine operation are presented and compared with experimental data under several different firing sequences. Unique impacts of dynamic skip fire on air estimation, and performance parameters are discussed.
2015-04-14
Technical Paper
2015-01-0195
Satishchandra C. Wani
Bonds wires in automotive electronics modules are used to carry current from external harness to components on PCB. They are very thin wires (few µm) made up of gold, aluminum or copper and have to undergo mechanical reliability to withstand extreme mechanical and thermal loads under vehicle operation. Thermal reliability of bond wire is to make sure that it can withstand prescribed electric current under given external boundary conditions without fusing retaining electronic module functionality. While carrying current, wire bond material by nature offers electric resistance that is converted to heat, joule heating, is proportional to current flow and electrical resistance. For constant current flow, electrical resistance is proportional to wire material resistivity, length and inversely proportional to cross sectional area available for current flow. The resistivity of wire increases with temperature thus leading to thermal runaway situation if not handled properly.
2015-04-14
Technical Paper
2015-01-1302
Alexander Oliva, Stefan Held, Anatoli Herdt, Georg Wachtmeister
The piston assembly development of internal combustion engines is between the conflicting priorities of blow-by, friction, oil consumption and wear. The aim of this conflict consists in finding a minimum for all the mentioned parameters. This optimization can only be successful, if all involved effects are understood properly. In this paper only the 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 the decision why the here described way of modelling has been picked. Further, the determination of the complex geometry is described, which results in a challenging calculation area. Beside the constraints for temperature and pressure, also a meshing method for the creation of a dynamic mesh is explained that is capable to describe the movement of all three rings of the piston ring pack simultaneously.
2015-04-14
Technical Paper
2015-01-1147
Dongxu Li
Driveline NVH characteristics is very important to vehicle drive quality and possible issues may be perceived by a customer through audible sound, drive torque and chassis etc. The strong need to further improve fuel efficiency demands powertrain systems of increased complexity that may result in new NVH issues. Many NVH phenomena are determined by driveline architecture (FWD, RWD, and AWD) as well powertrain subsystem architecture and components. In addition to transmission type (AT, DCT, CVT), architecture of a particular transmission and arrangement of components can affect driveline behavior to a large degree. As the driveline components are highly coupled, component identification and isolation for certain vibration phenomenon experienced from the driveline can be very challenging. In this context, development of a refined powertrain and driveline system with desired performance requires a deep understanding of such system is highly desired.
2015-04-14
Technical Paper
2015-01-1140
Kevin Newman, John Kargul, Daniel Barba
The Advanced Light-Duty Powertrain and Hybrid Analysis (ALPHA) modeling tool was created by EPA to estimate greenhouse gas (GHG) emissions of light-duty vehicles. ALPHA is a physics-based, forward-looking, full vehicle computer simulation capable of analyzing various vehicle types combined with different powertrain technologies. The ALPHA model has been updated from the previous version to include more realistic vehicle behavior and now includes internal auditing of all energy flows in the model. As a result of the model refinements, and in preparation for the 2017-2025 Light-Duty GHG rule mid-term evaluation (MTE), EPA is revalidating the model with newly acquired vehicle data. This paper presents the benchmarking, modeling and continued testing of a 2013 Chevy Malibu 1LS. During the initial benchmarking phase the engine and transmission were removed from the vehicle and tested and evaluated on separate test stands.
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