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Viewing 1 to 30 of 3655
2016-10-26
Event
This session describes the design, modeling and performance validation of cylinder heads, lubrication systems and pumps, coolant systems and pumps, intake manifolds, exhaust manifolds, and engine block structures.
2016-10-24
Event
Papers are invited on technology developments and the integration of these technologies into new emission control systems. Topics include the integration of various diesel particulate matter (PM) and diesel Nitrogen Oxide (NOx) reduction technologies plus analogous technologies for the growing population of direct injection gasoline engines. Novel developments in sensors and control systems will also be considered.
2016-10-17
Technical Paper
2016-01-2350
Jiangmi chen, Zhien Liu
This paper combines fluid software STAR-CCM+ and finite element software ABAQUS to stimulate the internal field of this Gasoline engine exhaust manifold based on the theory of loose coupling. Through the simulation of car parking cooling - full load condition at full speed, we estimate thermal fatigue life of the exhaust manifold with the plastic strain increment as the evaluation parameters. Results shows that the manifold satisfies the target life performance. Here we also made a consideration about the how the bolt force affects the manifold elastic and plastic material behavior.
2016-10-17
Technical Paper
2016-01-2352
Narendra V. Bansode, Arnab Ganguly, Vikas Kumar Agarwal
In SAE paper 2016-01-1080, the authors have discussed the importance of simulating and predicting excessive thermal stress in the components of a dual exhaust muffler assembly at their design stage. A simulation procedure was put forward which was able to effectively combine the CFD and FE analysis to accurately predict a failure in one of the muffler component. It has thereby ensured the durability of this part and saved precious prototyping cost and time. This paper primarily deals with the design improvement of another component in the dual exhaust muffler assembly for the same single cylinder gasoline engine used in a sports bike. Volume mapping method is used in which flow and temperature field is solved in CFD software and temperature distribution is obtained to apply on FE based mesh to analyze thermal stress.
2016-10-17
Technical Paper
2016-01-2211
Peter Larsson, Will Lennard, Oivind Andersson, Per Tunestal
Increased research is being driven by the automotive industry facing challenges, requiring to comply with both current and future emissions legislation, and to lower fuel consumption. The reason for this legislation is to restrict the harmful pollution which every year causes 3.3 million premature deaths worldwide. One factor that causes this pollution is NOx emissions. NOx emission legislation has been reduced from 8 g/kWh (Euro 1) down to 0.4 g/kWh (Euro 6) and recently new legislation for ammonia slip results in even more challenge for the SCR technology. In order to achieve a good NOx conversion together with a low slip of ammonia, small droplets of UREA solution need to be injected which can be rapidly evaporated and mixed into the flow of exhaust gases.
2016-10-17
Technical Paper
2016-01-2212
Peter Larsson, Will Lennard, Jessica Dahlstrom, Oivind Andersson, Per Tunestal
Yearly 3.3 million premature deaths occur worldwide due to air pollution and NOx pollution counts for nearly one seventh of those. This makes exhaust after-treatment a very important research and hase caused the permitted emission levels for NOx to decrease to very low levels, for EURO 6 only 0.4 g/kWh. Recently new legislation on ammonia slip with a limit of 10 ppm NH3 has been added which makes the SCR-technology more challenging. This technology injects small droplets of an aqueous UREA solution into the stream of exhaust gases and through a catalytic reaction within the SCR-catalyst, NOx is converted into Nitrogen and Water. To enable the catalytic reaction the water content in the UREA solution needs to be evaporated and the ammonia molecules need to have sufficient time to mix with the gases prior to the catalyst.
2016-10-17
Technical Paper
2016-01-2213
Tomoaki Ito, Makoto Nagata
Diesel exhaust emission control systems often contain DOC (Diesel Oxidation Catalyst) + CSF (Catalyzed Soot Filter) components. In this system PM (particulate matter) is filtered and accumulated in the CSF and such filtered PM is periodically combusted by supplying heat to the CSF. The heat to CSF is generated within the DOC by an exothermic reaction with extra fuel supplied to the DOC. Here the exothermic performance of DOC depends on not only the active catalytic site (such as Pt and/or Pd) but also on the characteristics of the porous material supporting the precious metals. Various properties of Al2O3, i.e. pore diameter, pore volume, BET, acidity, basicity and the Ea (activation energy) of fuel combustion, used in DOCs and PGM particle size of each DOC were measured. The fuel combustion performance of each DOC was evaluated by diesel engine bench.
2016-10-17
Technical Paper
2016-01-2214
Teuvo Maunula, Thomas Wolf
The emission regulations for mobile on- and off-road applications are becoming stricter in Euro 6/Stage 5 and beyond levels and require the use of SCR for NOx and diesel particulate filter (DPF) for PM removal. The presence of wall-flow filter with active regeneration creates a risk of thermal deactivation of SCR catalyst in the aftertreatment system (ATS). The thermal and chemical durability of Cu- and Fe-SCR catalysts were screened and developed to stand these conditions. The performance of catalysts were investigated with laboratory simulations and engine-bench equipments. New Cu-SCR catalysts have a very high low-temperature SCR activity and a low dependency on NO2 promotion. Developed Fe-SCR catalysts showed also an improved low temperature activity and durability but were more dependant on NO2 concentration too. Low N2O formation with Cu-SCR catalyst is a key factor to minimize green house gas emissions.
2016-10-17
Technical Paper
2016-01-2348
Rudolf Wichtl, Michael Schneider, Peter Grabner, Helmut Eichlseder
The required CO2 reduction by legislation represents a major challenge to the OEMs now and in the future. The use of fuel consumption saving potentials of friction causing engine components can make a significant contribution. Boundary potential aspects of a combustion engine offer a good opportunity for estimating fuel consumption potentials. As a result, the focus of development is placed deliberately on components with great potential. Friction investigations using the motored method are still state of the art. The disadvantages using this kind of friction measurement method are incorrect engine operating conditions like cylinder pressure, piston and liner temperatures, piston secondary movement and warm deformations which can lead to incorrect measurement results compared to a fired engine. In the last few years two new friction measurement methods came up, the so called “floating liner” method and a motored friction measurement with external charging.
2016-10-17
Technical Paper
2016-01-2349
Suresh Kumar Kandreegula, Ram Krishna Kumar Singh, Jham Tikoliya
To compete with the current market trends there is always a need to arrive at a cost effective and light weight designs. For Commercial Vehicles, an attempt is made to decrease weight of the current design without compromising its strength & stiffness, considering/bearing all the worst road/engine load cases and severe environmental conditions. The topic was chosen because of interest in higher payloads, lower weight, and higher efficiency. Automotive cylinder head must be lighter in weight, to meet increasingly demanding customer requirements. The design approach for cylinder head has made it difficult to achieve this target. A designer might make some judgment as to where ribs are required to provide stiffness, but this is based on engineering experience and Finite Element Analysis (FEA) of the stand-alone head.
2016-08-15 ...
  • August 15-16, 2016 (8:30 a.m. - 4:30 p.m.) - Rosemont, Illinois
Training / Education Classroom Seminars
Stringent requirements of reduced NOx emission limits in the US have presented engineers and technical staff with numerous challenges. Several in-cylinder technical solutions have been developed for diesel engines to meet 2010 emission standards. These technologies have been optimized and have yielded impressive engine-out results in their ability to reduce emissions to extremely low levels. However, current and state-of-the-art in-cylinder solutions have fallen short of achieving the limits imposed on diesel emissions for 2010.
2016-06-15
Technical Paper
2016-01-1822
Drasko Masovic, Franz Zotter, Eugene Nijman, Jan Rejlek, Robert Höldrich
Abstract Radiation of sound from an open pipe with a hot mean flow presents one of the classic problems of acoustics in inhomogeneous media. The problem has been especially brought into focus in the last several decades, in the context of noise control of vehicle exhaust systems and jet engines. However, the reports on the measurements of the radiated sound field are still rare and scattered over different values of subsonic and supersonic flow speeds, cold and hot jets, as well as different sound frequency ranges. This paper focuses on low Mach number values of the mean flow speed and low frequencies of the incident (plane) sound waves inside an unflanged cylindrical pipe with a straight cut. It presents the results of the far-field radiation pattern measurements and compares them with an existing analytical model from the literature. The mean flow inside the pipe reached Mach number values up to 0.25 and temperature up to 300°C.
2016-06-15
Technical Paper
2016-01-1820
Mikael Karlsson, Magnus Knutsson, Mats Abom
Abstract This work explores how fluid driven whistles in complex automotive intake and exhaust systems can be predicted using computationally affordable tools. Whistles associated with unsteady shear layers (created over for example side branches or perforates in resonators) are studied using vortex sound theory; vorticity in the shear layer interacts with the acoustic field while being convected across the orifice. If the travel time of a hydrodynamic disturbance over the orifice reasonably matches a multiple of the acoustic period of an acoustic feedback system, energy is transferred from the flow field to the acoustic field resulting in a whistle. The actual amplitude of the whistle is set by non-linear saturation phenomena and cannot be predicted here, but the frequency and relative strength can be found. For this not only the mean flow and acoustic fields needs to be characterized separately, but also the interaction of the two.
2016-06-15
Technical Paper
2016-01-1843
Jan Krueger, Viktor Koch, Ralf Hoelsch
Abstract Over the past few years, the measurement procedure for the pass-by noise emission of vehicles was changed and new limit values have been set by the European Parliament which will come into force within the next few years. Moreover, also the limits for chemical emissions such as NOx, particulates and CO2 have been lowered dramatically and will continue to be lowered according to a roadmap decided not only in Europe but also in other markets throughout the world. This will have an enormous impact on the design of future passenger cars and in particular on their powertrains. Downsizing, downspeeding, forced induction, and hybridization are among the most common general technology trends to keep up with these challenges. However, most of these fuel saving and cleaner technologies also have negative acoustic side effects.
2016-06-15
Technical Paper
2016-01-1826
Roman Gartz, Detlev Rammoser, Matthew Maunder
Abstract The transfer characteristics, location of the mounting points, where the exhaust system is attached to the vehicle structure, and the level of excitation forces have a significant contribution to the overall interior noise. The aim of this study is to define targets for the excitation forces of the exhaust line in order to identify its contribution to the overall vehicle interior cabin noise in the early vehicle concept phase when the hardware is not yet available. Furthermore, psychoacoustic parameters are calculated, e.g. the articulation index which provide a representation of the human hearing perception. Therefore a software tool was developed in MATLAB to cascade the interior noise contributions of the exhaust system using the corresponding transfer paths. This tool enables a quick prediction of different combinations (different hanger stiffness and other parameters) to evaluate the potential for improvements.
2016-06-14
Event
2016-06-03
Magazine
Executive viewpoints Industry leaders offer their insights on the state of the heavy-duty on- and off-highway industries in this annual series of opinion pieces. The executives share their views on the most pressing technologies and trends shaping their business and the industry moving forward. Annual Product Guide Top products from throughout the industry covering technologies such as Powertrain & Energy, Hydraulics, Electronics, and Testing & Simulation.
2016-05-18
Journal Article
2016-01-9109
Roxanna Moores, Nicholas Cernansky, Gregory Birky, Timothy Suder
Abstract In this study a 1-dimensional computational model of a Fe-Zeolite catalyst, implementing conservation of mass, species and energy for both gas and catalyst surface phases has been developed to simulate emissions conversion performance. It is applied to both a fresh catalyst and one that has been aged through exposure to the exhaust system of a Heavy Duty Diesel engine performing in the field for 376K miles. Details of the chemical kinetics associated with the various NOx reduction reactions in the two Fe-Zeolite configurations have been examined and correlated with data from a synthetic gas rig test bench. It was found that the Standard reaction, (4NH3 + 4NO + O2 → 2N2 + 6H2O), which is one of the main reactions for NOx reduction, degraded significantly at the lower temperatures for the aged system.
2016-05-17
Magazine
Base-engine value engineering for higher fuel efficiency and enhanced performance Continuous improvement in existing engines can be efficiently achieved with a value engineering approach. The integration of product development with value engineering ensures the achievement of specified targets in a systematic manner and within a defined timeframe. Integrated system engineering for valvetrain design and development of a high-speed diesel engine The lead time for engine development has reduced significantly with the advent of advanced simulation techniques. Cars poised to become 'a thing' Making automobiles part of the Internet of Things brings both risks and rewards. Agility training for cars Chassis component suppliers refine vehicle dynamics at the high end and entry level with four-wheel steering and adaptive damping.
2016-04-13
Event
This session deals with particle emissions from combustion engines, including measurement and testing methods, and the effects of changes in fuel composition. Topics include the environmental and health effects of elemental carbon and organic carbon that constitutes solid cored particles plus the environmental and health effects of secondary organic aerosol emissions. This includes particulate emissions from both gasoline and diesel engines.
2016-04-13
Event
This session describes the design, modeling and performance validation of cylinder heads, lubrication systems and pumps, coolant systems and pumps, intake manifolds, exhaust manifolds, and engine block structures.
2016-04-13
Event
This session deals with particle emissions from combustion engines, including measurement and testing methods, and the effects of changes in fuel composition. Topics include the environmental and health effects of elemental carbon and organic carbon that constitutes solid cored particles plus the environmental and health effects of secondary organic aerosol emissions. This includes particulate emissions from both gasoline and diesel engines.
Viewing 1 to 30 of 3655

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