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Viewing 1 to 30 of 12285
2017-04-04
Event
Technical presentation, review and investigation focusing on China market, including powertrain technology roadmap, regulation review, product development and localization, off road applications, new technology evaluation etc, covering both conventional and alternative powertrain and other vehicular component and system aspects.
2017-04-04
Event
This session considers modeling (zero-D, 1D, 2D, 3D CFD) and experimental papers on: combustion chamber, systems (lubrication, cooling, fuel, EGR); components (oil pumps, coolant pump, fuel injectors, compressors, turbines, turbochargers, torque converters, gear box, fans, bearings, valves, ports, manifolds, turbine housing); heat exchangers (radiators, oil coolers); aftertreatment (SCR, DOC, DOF, exhaust gas cooling); battery cooling (HEV, EV, motor/generator) and controls (passive and active).
2017-04-04
Event
This session covers topics regarding new CI and SI engines and components. This includes analytical, experimental, and computational studies covering hardware development as well as design and analysis techniques.
2017-04-04
Event
Classical diesel engine combustion with relatively short ignition delay, including papers dealing with low CR and high EGR calibrations. Papers describing experiments and test data, simulation results focused on applications, fuel/additive effects, combustion control, and mode change are invited and will be placed in appropriate sub-sessions. Papers with an emphasis on the modeling aspects of combustion are encouraged to be submitted into PFL110 or PFL120 modeling sessions.
2017-04-04
Event
This session includes four papers related to spark-ignition engines and their fuels and five papers related to the processes of compression ignition combustion of different fuels.
2017-04-04
Event
This session focuses on both SI and CI combustion and mixture preparation during cold start and transient engine operation. Example topics include engine performance, emissions, control strategies and calibrations for cold start and transient operation impact on NOx, PM, HC, CO, and CO2 emissions; also including the impact of variable valve timing, spark, and turbocharger controls.
2017-04-04
Event
This session sets out to reflect the recent advances on the research, development and practices of Powertrain NVH treatment. The technical papers are of interest to powertrain system designers, testing specialists, NVH experts, and other individuals who evaluate and develop technologies to control powertrain NVH. The coverage includes: engine, engine subsystem and components noise and vibration; powertrain systems noise measurement and instrumentation; powertrain systems noise analysis.
2017-04-04
Event
Separate sub-sessions cover zero-dimensional, one-dimensional, and quasi-dimensional models for simulation of SI and CI engines with respect to: engine breathing, boosting, and acoustics; SI combustion and emissions; CI combustion and emissions; fundamentals of engine thermodynamics; numerical modeling of gas dynamics; thermal management; mechanical and lubrication systems; system level models for controls; system level models for vehicle fuel economy and emissions predictions.
2017-04-04
Event
The session covers advances in the development and application of models and tools involved in multi-dimensional engine modeling: 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.
2017-04-04
Event
Papers are invited for this session on the general topics of combustion engine gaseous emissions (regulated and non-regulated). This includes papers discussing well-to-wheels CO2 production for alternative technologies, fuel economy and all greenhouse gas emission research with their primary focus on engine, emissions, fuels, control or related components or sub-components within. It also includes hydrocarbon species and specific NOx species production over aftertreatment devices as a result of changes in fuel specification and the inclusion of bio-derived components and consideration of secondary emissions production (slip) as a result of aftertreatment. (Papers focusing on vehicle-system approach on fuel economy should be directed to PFL370.)
2016-11-15
Event
This session focuses on advanced combustion technologies in both 4-stroke and 2-stroke engines. The scope of topics includes studies of mixture formation, dilution effects, ignition, abnormal combustion, engine efficiency, flame propagation, and emissions formation.
2016-11-15
Event
This session focuses on advanced combustion technologies in both 4-stroke and 2-stroke engines. The scope of topics includes studies of mixture formation, dilution effects, ignition, abnormal combustion, engine efficiency, flame propagation, and emissions formation.
2016-11-15
Event
This session contains manuscripts focused on two-stroke engines. Topics such as emissions, performance, and efficiency will be explored. Advanced combustion control, direct fuel injection, simulation models and experimental results will be presented.
2016-11-15
Event
Papers in this session will pertain to studies of naturally aspirated and boosted diesel engines including their design, emission control, NVH, fuel system, fuel type, aftertreatment, combustion quality, or engine control.
2016-11-15
Event
This session focuses on advanced combustion technologies in both 4-stroke and 2-stroke engines. The scope of topics includes studies of mixture formation, dilution effects, ignition, abnormal combustion, engine efficiency, flame propagation, and emissions formation.
2016-11-15
Event
This session contains manuscripts focused on two-stroke engines. Topics such as emissions, performance, and efficiency will be explored. Advanced combustion control, direct fuel injection, simulation models and experimental results will be presented.
2016-11-08
Technical Paper
2016-32-0003
Chunming Hu, Liu Na MD
In order to analyze the abnormal combustion phenomenon occurred in combustion chamber of the GDI engine, a new method on the integral of heat release rate (IHRR) was proposed in this paper to indicate the energy changing process at knock in the engine cylinder. The energy, which contained most of the band-pass filtered heat released by end gas auto-ignition, in some certain frequency bands at knock was higher than normal combustion and can be used to indicate knock intensity (KI). The testing on a single-cylinder low pressure air-assistant GDI engine was carried out to analyze the linear correlation between IHHR and the Maximum Amplitude Pressure Oscillation (MAPO), and the knock combustion analysis and control based on IHHR were conducted at same time in this paper. Testing data showed that IHRR and MAPO were good linear correlation, which can be convenient and more accurate to investigate the knock process of the GDI engine.
2016-11-08
Technical Paper
2016-32-0007
Kento Shimizu, Shuhei Takahata, Kenta Miura, Hideo Shoji, Akira Iijima, Toshimasa Utaka, Kazushi Tamura
Abnormal combustion experiments were conducted in which engine oil additives were mixed into the test fuel in order to investigate their influence on the occurrence of abnormal combustion. A four-stroke side-valve engine that allowed in-cylinder visualization of the combustion flame and light absorption measurements were used in the experiments. Different type of calcium-based engine oil additives were mixed into the primary reference fuel (PRF 50) at the same ratios at which they are found in ordinary automotive engine oil.
2016-11-08
Technical Paper
2016-32-0063
Marc Cyrill Besch, April Nicole Covington, Derek Johnson, Nathan Fowler, Robert Heltzel
The aim of this investigation was to improve understanding and quantify the impact of exhaust gas recirculation (EGR) as an emissions control measure onto cyclic variability of a small-bore, single-cylinder, diesel-fueled compression-ignition (CI) power generation unit. Of special interest were how cycle-to-cycle variations of the CI engine affect steady-state voltage deviations and frequency bandwidths. Furthermore, the study strived to elucidate the impact of EGR addition onto combustion parameters, as well as gaseous and particle phase emissions along with fuel consumption. The power generation unit was operated over five discrete steady-state test modes, representative of nominal 0, 25, 50, 75, and 100% engine load (i.e. 0-484kPa BMEP), by absorbing electrical power via a resistive load bank. The engine was equipped with a passive EGR system that directly connected the exhaust and intake runners through a 4mm diameter passage.
2016-11-08
Technical Paper
2016-32-0046
Stephan Schneider, Marco Chiodi, Horst Friedrich, Michael Bargende
The proposed paper deals with the development process and initial measurement results of an opposed piston engine for the use in a Free Piston Linear Generator (FPLG). The FPLG, which is being developed at the German Aerospace Center (DLR), is an innovative internal combustion engine for the generation of electrical power. With its arrangement, the piston freely oscillates between the compression chamber of the combustion unit and a gas spring with no mechanical coupling like a crank shaft. A linear alternator converts the kinetic energy of the moving piston into electric energy. The virtual development of the novel combustion system is divided into two stages: One the one hand, the combustion system including e.g. a cylinder liner, pistons, cooling and lubrication concepts has to be developed.
2016-11-08
Technical Paper
2016-32-0005
Kotaro Takeda, Shimada Takashi, Yuki Yoshida, ZhiMin Lin, Akira Iijima, Hideo Shoji
One of the main issues of high efficient Spark Ignition (SI) engine is knocking. In addition, the extremely rapid combustion that occurs under a high load in an HCCI engine prevents the stable operating region from being expanded. It is known that abnormal combustion occurs in an HCCI engine accompanied by in-cylinder pressure oscillations resembling knock in spark-ignition (SI) engines. In this study, experiments were conducted in which images of SI and HCCI combustion were obtained using the same test engine and frame rate. A two-stroke engine that allowed visualization of the entire bore area was used in this study. In the visualization experiments, the condition in the cylinder was photographed directly with a high-speed camera through a quartz observation window installed in the top of the cylinder head. Photographs were taken at a speed of 54000 frames/s and a resolution of 256 x 256 pixels.
2016-11-08
Technical Paper
2016-32-0062
Yusuke Miyata
Recently, large market of industrial machinery is formed across Asian countries due to the mechanization of industries. In China and India, where further economic growth is expected, tighter exhaust emissions regulations are phased in for industrial diesel engines with the rise of environmental awareness. On the other hand, high durability, low fuel consumption and low cost are earnestly requested for those engines. While diesel engines with mechanical direct fuel injection system have potential to meet their demands at high levels, it is difficult to achieve both low-fuel consumption and low-exhaust emissions.  To exhibit these performances, it is important to keep good condition of combustion even under high EGR rate. We adopted high pressure fuel supply pump, and concave fuel cam profile which realize high injection rate for promoting atomization of injected fuel.
2016-11-08
Technical Paper
2016-32-0064
Keiya Nishida, Takeru Matsuo, Kang Yang, Youichi Ogata, Daisuke Shimo
The injection amount per stage in the multiple injection strategy is smaller than the conventional single-stage injection. The research of the spray mixture formation and the combustion characteristics with a small injection amount is being meaningful. In this study, the effect of the injection amount (0.27mg, 0.89mg, 2.97mg) under 100MPa injection pressure and the effect of injection pressure (100MPa, 170MPa) under different injection amount (0.27mg, 2.97mg) on the spray and mixture formation characteristics were studied based on the vapor and liquid phase concentration distributions in the fuel spray by using the tracer LAS technique. In order to satisfy the requirements for the LAS test fuel, the tracer LAS technique was adopted. The spray was injected used a single-hole nozzle with a diameter 0.133mm into the high-pressure and high-temperature constant volume vessel.
2016-11-08
Technical Paper
2016-32-0004
Muhammad Amin
In the current situation of automobile industry where engineers are focusing on making more efficient fuel engines that are not only efficient but more reliable.Engineers all around world are working on this kind of technologies which includes adding turbo chargers,more efficient transmission and variable compression ratio. Variable compression ratio can be easily through special designed pistons that saves upto 20% fuel and is more powerful than conventional engines.It can adjust the compression ratio based on driving conditions giving the maximum fuel economy.
2016-11-08
Technical Paper
2016-32-0047
Xinyan Wang, Jun Ma, Hua Zhao
In this study, a 2-stroke Boosted Uniflow Scavenged Direct Injection Gasoline (BUSDIG) engine was proposed and researched to achieve aggressive engine downsizing and downspeeding. Compared to the loop or cross scavenged 2-stroke engines, the BUSDIG engine can achieve excellent scavenging performance and be operated with higher boost pressure as well as the absence of air and fuel short-circuiting. As a fundamental engine geometric parameter, the bore/stroke (B/S) ratio would directly affect the scavenging process in the uniflow scavenged 2-stroke engine. In this paper, the three dimensional (3D) computational fluid dynamics (CFD) simulations were applied to investigate the scavenging process in the BUSDIG engine with different bore/stroke (B/S) ratios. Four bore and stroke (B/S) ratios of 0.66, 0.8, 1 and 1.3 were analyzed.
2016-11-08
Technical Paper
2016-32-0045
Joseph K. Ausserer, Marc D. Polanka, Paul Litke, Jacob Baranski
Small remotely piloted aircraft (20-55 lbs) powered by internal combustion engines typically operate on motor gasoline, which has an anti-knock index (AKI) greater than 80. In order to comply with the single battlefield fuel initiative in DoD Directive 4140.25, there is an increasing interest in converting the 1 10 kW power plants in the aforementioned size class to run on lower AKI fuels such as Diesel and JP-8, which have AKIs of approximately 20. It has been speculated that the higher losses (short circuiting, incomplete combustion, heat transfer) that cause these engines to have lower efficiencies than their conventional scale counterparts may also relax the fuel AKI requirements of the engines. To investigate that supposition, the fuel AKI requirement of a 3W-55i engine (a larger variant of the engine used on the Scan Eagle) was mapped and compared to operation of the engine on the manufacturer recommended 98 ON fuel.
2016-11-08
Technical Paper
2016-32-0038
He Changming, Xu Sichuan
Current lightweight IC engine has potentials to further decrease CO2 emissions and improve fuel economy due to less friction losses. Small and compact IC engines with higher power density have been developed in order to achieve these downsizing targets for recent years. Here an innovative opposed-piston diesel engine in two-stroke mode was built, which with upgraded power performance and thermal efficiency advantages, as well as almost equivalent fuel consumption and pollutant emissions as compared to conventional four-stroke diesel engines. But the exhaust manifold of this engine will be subjected to thermo-mechanical fatigue from higher thermal loads. The maximum exhaust gas temperature is also elevated that may cause cracking on exhaust manifold. At design initial stage, compared with physical prototypes, a series of virtual model verifications with modern analytic tools seems to be more feasible and reasonable, in consideration of relatively high costs and time saving.
2016-11-08
Technical Paper
2016-32-0049
Kuniyoshi Eto, Masaru Nozawa, Masato Nara, Buhei Kobayashi, Daiki Shibasaki, Ken Shirai
A new air-cooled SI two-stroke gasoline engine has been developed for an arborist-chainsaw. This engine has a displacement of 25 cc and generates about 1.1 kW and complies with the latest CARB and EPA exhaust regulations by optimizing scavenging flows and the use of a catalytic converter. Characteristics of lightweight, compact and high power-to-weight ratio are required for handheld chainsaws, especially for arborist chainsaws. As a matter of course, these characteristics are needed for engine itself in order to satisfy such market requirements for hand-held power equipment. To realize lightweight and compact design, the placement of catalytic converter is optimized for the engine and a two-piece crankshaft is adopted.
2016-11-08
Technical Paper
2016-32-0006
Ran Amiel, Leonid Tartakovsky
This paper provides an overview of the effect of a flight altitude on knock occurrence in reciprocating SI turbocharged engines. It presents results of the computational study aimed at investigating reasons leading to knock occurrence and methods of alleviating the knock tendency of aircraft engines. Knock has been one of the key limiting factors in the development of IC engines since the first use of the technology more than a century ago. Aviation platforms are becoming increasingly widespread around the world, and turbochargers are frequently added to improve the performance of the platforms at high altitudes. Although a turbocharger provides the benefits of improved BSFC and a downsized engine, turbocharging can result in engine knock because of increasing the intake air temperature, due to a rise in the compression ratios as the air density drops.
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