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Viewing 1 to 30 of 11986
2015-10-22 ...
  • October 22-23, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
Engines can and do experience failures in the field in a variety of equipment, vehicles, and applications. On occasion, a single vehicle type or equipment family will even experience multiple engine failures leading to the inevitable need to determine what the most likely cause of one or all of those failures was. This comprehensive seminar introduces participants to the methods and techniques used to determine the most likely cause of an individual engine or group of engine failures in the field.
2015-09-28 ...
  • September 28, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
The improved efficiencies of the modern diesel engine have led to its increased use within the mobility industry. The vast majority of these diesel engines employ a high-pressure common rail fuel injection system to increase the engine's fuel-saving potential, emissions reduction, and overall performance. This one-day seminar will begin with a review of the basic principles of diesel engines and fuel injection systems. Diesel and alternative fuels will be discussed, followed by current and emerging diesel engine applications.
2015-08-18 ...
  • August 18-19, 2015 (8:30 a.m. - 4:30 p.m.) - Rosemont, Illinois
Training / Education Classroom Seminars
Meeting the requirements of heavy-duty engine emissions regulations is a challenge for all engine manufacturers. Since the introduction of Exhaust Gas Recirculation (EGR) in medium and heavy-duty diesel engines, these systems have become more sophisticated and tightly integrated with emission control systems. This 2-day seminar will explore the advantages and disadvantages of EGR and the most effective implementation of various EGR systems. This seminar will begin by defining EGR and why it is used in diesel engines, along with an explanation of the mechanisms by which EGR is able to reduce NOx.
2015-08-04 ...
  • August 4-6, 2015 (2 Sessions) - Live Online
Training / Education Online Web Seminars
This web seminar provides an in-depth overview of diesel engine noise including combustion and mechanical noise sources. In addition, the instructor will discuss a system approach to automotive integration including combining sub-systems and components to achieve overall vehicle noise and vibration goals.
2015-06-24
Event
The diesel NVH session is focused on issues related to making diesel engines achieve better NVH characteristics. Topics include both analytical and experimental techniques for developing low noise diesel engines and components. Related topics covered in this session include linear and torsional vibration of diesel engines, as well as features intended to reduce diesel specific intake and exhaust noise problems, such as turbocharger whine.
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
2015-01-2295
Aniket Parbat, Todd Tousignant, Kiran Govindswamy
The definition of vehicle and powertrain level targets is one of the first tasks toward establishing where a vehicle will reside with respect to the current or future state of industry. Target setting at the vehicle level is relatively straightforward. Realization of these targets relies on a combination of competitive powertrain (source) and vehicle (path) NVH performance. Assessment of vehicle NVH performance (sensitivity) is well understood, and can be accomplished through determination of customer interface response to measured excitations at the source input locations. However, definition of powertrain source targets can be more difficult, particularly if powertrain level data (as acquired in a hemi-anechoic powertrain test cell) is not available. In addition to powertrain source noise and vibration levels, methods have been developed for quantification of powertrain radiated sound quality issues which can propagate to the vehicle.
2015-06-15
Technical Paper
2015-01-2298
Stephen Chittick, Mark Swindell, Samir Raorane
As part of the long-term business strategy Jaguar Land Rover (JLR) has designed and developed a new family of advanced, highly efficient engines for future models. The all-new Ingenium family of inline 4 cylinder engines will increase JLR's capability to offer high performance engines with class-leading levels of refinement, whilst ensuring continued significant reductions in vehicle emissions. This paper details the NVH development of the lead engine, a 2.0 litre common rail turbo diesel. The task from the outset of this new programme was to reduce the mass of the engine by 21.5kg, whilst also improving the structural attenuation by 5 dB in comparison to the outgoing engine. Improving the structural attenuation by 5 dB was not only a key enabler in reducing combustion noise, but also helped to achieve a certified CO2 performance of 99 g/km in the all-new Jaguar XE model, by allowing more scope for increasing cylinder pressure forcing without compromising NVH.
2015-06-15
Technical Paper
2015-01-2299
Dhanesh Purekar
In comparison to medium duty and heavy duty diesel engines, NVH development of light duty diesel engines requires significant collaboration with the OEM. Typically, competitive benchmark studies and customer expectations define the NVH targets at the vehicle and subsequently cascaded down at the powertrain level. For engine manufacturing companies like Cummins, it is imperative to work closely with OEM to deliver on the NVH expectations. In certain situations, engine level NVH targets needs to be demonstrated in the OEM or 3rd party acoustic test facility for contract approvals. However, this is a difficult task to accomplish, considering the differences between acoustic test facilities and hardware, instrumentation, etc. In addition, engine itself is a big contributor to the noise variation. This technical paper documents one such case study conducted on a standalone light duty diesel engine in three different acoustic test facilities.
2015-06-15
Technical Paper
2015-01-2297
Insoo Jung, Jaemin Jin, Kwangmin Won, Kyoungdoug Min, Hoimyung Choi
Combustion noise of diesel engine can be deteriorated by combustion characteristics that are influenced by the factors such as engnine NVH durability, driving conditions, environmental factors and fuel properties. Therefore we need to develop robust combustion noise to be insensitive to the factors. To achieve this purpose, the method for combustion characteristics prediction has been developed by means of analyzing vibration signal measured from engine cylinder block. The closed-loop control by controlling injection parameters through combustion characteristics prediction has been carried out to make combustion characteristics that we want to exhibit. We have also evaluated the effect of combustion noise and fuel consumption by applying the closed-loop control.
2015-06-15
Technical Paper
2015-01-2296
Seunghyun Lee, Kyoungdoug Min
The diesel engine noise is classified into mechanical noise, flow dynamic noise and combustion noise. Among of them, the combustion noise is higher than the others due to diesel combustion high compression ratio and auto ignition. The injected fuel is mixed with air in ignition delay process, followed by simultaneous ignition of premixed mixture. This process results in rapid pressure rise which is the main source of the combustion noise. The amount of fuel burned during premixed combustion is mainly affected by the ignition delay. The EGR rate has impact on the ignition delay, and thus it influences combustion noise characteristics. Therefore, during the transient state, combustion noise characteristics changes as the EGR rate deviates from the target value. Therefore, in this study, the effect of EGR rate deviation during transient state the combustion noise is studied. The 1.6 L diesel engine with a VGT was used for the experiment.
2015-06-15
Technical Paper
2015-01-2250
Masahiro Akei, Nobutaka Tsujiuchi, Akihito Ito, Takayuki Yamauchi, Daisuke Kubota
This paper describes the identification of the sound source model for the diesel engine installed on the agricultural machine by Inverse-Numerical Acoustic analysis (INA), and the noise prediction using the sound source model identified by INA. INA is a method to identify surface vibrations from surrounding sound pressures. This method is applicable for a complicated-shaped sound source like an engine. Although many studies about INA have been conducted, these past studies are the studies on improvement of the identified accuracy and noise prediction in the free sound field or hemi-free sound field. The authors predicted accurately sound pressure level of engine enclosure using sound source model identified by INA and boundary element method (BEM). However, we have not yet verified the effectiveness of sound source model against the enclosure which has an absorption material and an opening.
2015-06-15
Technical Paper
2015-01-2333
Brandon Sobecki, Patricia davies, J Stuart Bolton, Frank Eberhardt
Component sound quality is an important factor in the design of competitive diesel engines. One component noise source that causes complaints is the gear rattle that originates in the front-of-engine gear train which drives the fuel pump and other accessories. The rattle is caused by repeated tooth impacts resulting from fluctuations in differential torsional acceleration of the driving gears. These impacts generate a broadband, impulsive noise that is often perceived as annoying. In most previous work, the overall sound quality of diesel engines has been considered without specifically focusing on predicting the perception of gear rattle. Gear rattle level has been quantified based on angular acceleration measurements, but those measurements can be difficult to perform. Here, the emphasis was on developing a metric based on subjective testing of the perception of gear rattle.
2015-06-15
Technical Paper
2015-01-2234
Giancarlo Chiatti, Ornella Chiavola, Silvia Conforto, Manfredi Amalfi
Besides pollutant emissions, fuel consumption and performance, vehicle NVH constitutes a further object during engine development and optimization. In recent years, research activity for diesel engine noise reduction has been devoted to investigate aerodynamic noise due to intake and exhaust systems and surface radiated noise. Most of the attention has been devoted to the identification and analysis of noise sources in order to evaluate the individual contribution (injection, combustion, piston slap, turbocharger, oil pump, valves) to the overall noise with the aim of selecting appropriate control strategies. Several studies have been devoted to analyze combustion process that has a direct influence on engine noise emission; the influence of injection strategies on the combustion noise has been evaluated and approaches able to separate engine combustion and mechanical noise have been presented.
2015-06-01 ...
  • June 1-5, 2015 (8:00 a.m. - 8:00 p.m.) - Troy, Michigan
Training / Education Classroom Engineering Academies
This Academy covers the diesel engine engineering principles and practices necessary to effectively understand a modern diesel engine. Types of engines addressed include naturally aspirated, turbocharged, pre-chamber, open chamber, light duty, and heavy duty. It is an intensive learning experience comprised of lecture and structured practical sessions, including a team-solved case study problem. Evening sessions are included. Attendees will receive a copy of the textbook, Diesel Emissions and Their Control, by lead instructor Magdi K. Khair and W. Addy Majewski.
2015-05-14 ...
  • May 14-15, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
  • October 19-20, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
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.
2015-04-23
Event
This sub-session covers zero-dimensional, one-dimensional, and quasi-dimensional models for simulation of CI engines with respect to combustion and emissions.
2015-04-23
Event
Papers focusing on efficiency and emissions for classical diesel engine combustion with relatively short ignition delay, including papers dealing with low CR and high EGR calibrations. Subject matter may include both experimental and simulation results focused on applications of piston bowl design, heat transfer, and fuel injection, or other factors affecting fuel efficiency and engine-out emissions.
2015-04-22
Event
Papers focusing on in-cylinder processes of classical diesel engine combustion with relatively short ignition delay, including papers dealing with low CR and high EGR calibrations. Subject matter may include both simulation results and experimental work, including applications of optical diagnostics, with emphasis on in-cylinder spray, evaporation, mixing, pollutant formation/destruction, or any other in-cylinder phenomena.
2015-04-22
Event
Papers focusing on in-cylinder processes of classical diesel engine combustion with relatively short ignition delay, including papers dealing with low CR and high EGR calibrations. Subject matter may include both simulation results and experimental work, including applications of optical diagnostics, with emphasis on in-cylinder spray, evaporation, mixing, pollutant formation/destruction, or any other in-cylinder phenomena.
2015-04-21
Event
Papers focusing on fuel and fuel additive effects on classical diesel engine combustion with relatively short ignition delay, including papers dealing with low CR and high EGR calibrations. Subject matter may include both experimental and simulation results focused on oxygenated or bio-derived fuels, alternative petroleum formulations, fuel blends, or any other fuel-related factors affecting engine performance and emissions.
2015-04-21
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.
2015-04-21
Event
Mixed mode with auto ignition but inhomogeneous charge. Injection-controlled but with EOI before SOC. Papers describing experiments and test data, simulation results focused on applications, fuel/additive effects, combustion control, and PPC injection strategies 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.
2015-04-21
Event
Mixed mode with auto ignition but inhomogeneous charge. Injection-controlled but with EOI before SOC. Papers describing experiments and test data, simulation results focused on applications, fuel/additive effects, combustion control, and PPC injection strategies 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.
2015-04-21
Event
Papers focusing on fuel and fuel additive effects on classical diesel engine combustion with relatively short ignition delay, including papers dealing with low CR and high EGR calibrations. Subject matter may include both experimental and simulation results focused on oxygenated or bio-derived fuels, alternative petroleum formulations, fuel blends, or any other fuel-related factors affecting engine performance and emissions.
2015-04-14
Technical Paper
2015-01-1015
Guanyu Zheng, Jianhua Zhang, Fengshuang Wang, Kaihua Zhao
Multiple suppliers have developed new cordierite 10.5″ OD substrates in China market. One key issue is to evaluate the feasibility of their applications to diesel SCR markets. To this end, test procedures were conceived and performed towards multiple substrate characteristics. Besides typical parameters such as product dimensions, structures, and material strength, thermo-mechanical properties were characterized by hot vibration, thermal shock and thermal cycle tests. Flow performance before and after tests was characterized by a hot flow bench. Four suppliers were selected to provide product samples which went through these developed rigorous test procedures. Comparisons of multiple properties were made. Conclusions regarding their applicability and recommendations for future work are provided at the end.
Viewing 1 to 30 of 11986

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