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2015-06-22
Event
This session is dedicated to the tools and methodology involved in identifying, calculating and modifying various noise and vibration sources and paths in vehicles, aircraft and various consumer products and assist in the design and validation of noise and vibration targets
2015-06-22
Event
This session covers subjective testing and analysis related to automotive noise and vibration, usually referred to as sound quality and vibration quality. The focus is on both subjective and objective tools and methods that can be used either to design sound or vibration quality into the automotive product, or to characterize and eliminate undesired sounds or vibrations.
2015-06-22
Event
This session covers the relationships between vibration and noise that can be generated throughout the vehicle. Included in this session are modal vibration studies related to noise, vibration transfer paths throughout the vehicle, and coupling of vibration and acoustical modes. Both experimental and analytical approaches are included in this session.
2015-06-22
Event
This session provides a good overview of recent innovations to SEA modeling techniques. SEA models can be used alone or together with hybrid analytical or experimental techniques to establish good comparative NVH predictions at the earliest stage of the vehicle design process. The papers of this session will describe recent advances and / or validations of SEA theory, applications, or use in conjunction with hybrid techniques for high- and mid-frequency NVH predictions.
2015-05-06 ...
  • May 6, 2015 (8:30 a.m. - 4:30 p.m.) - Tysons, Virginia
Training / Education Classroom Seminars
This seminar will include a review of statistical theory and present statistical methods, which are used to better select and/or analyze Tolerance Stack-ups. The Probability (RMS) Method, the Monte Carlo Simulation Technique and tolerance optimization techniques will be discussed along with guidelines on which method(s) to use in given situations. Attendees will also view a demonstration of a microcomputer Monte Carlo Simulation program that analyzes the effects of form and assembly variation on the quality of a finished product. This seminar will provide an overview of Design of Experiments (DOE)...
2015-03-16 ...
  • March 16-27, 2015 (6 Sessions) - Live Online
  • September 14-25, 2015 (6 Sessions) - Live Online
Training / Education Online Web Seminars
The Finite Element Analysis (FEA) has been widely implemented by automotive companies and is used by design engineers as a tool during the product development process. Design engineers analyze their own designs while they are still in the form of easily modifiable CAD models to allow for quick turnaround times and to ensure prompt implementation of analysis results in the design process. While FEA software is readily available, successful use of FEA as a design tool still requires an understanding of FEA basics, familiarity with FEA process and commonly used modeling techniques, as well as an appreciation...
2014-12-15 ...
  • December 15-17, 2014 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
  • April 1-3, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
  • August 10-12, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
  • December 9-11, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
RMS (Reliability-Maintainability-Safety-Supportability) engineering is emerging as the newest discipline in product development due to new credible, accurate, quantitative methods. Weibull Analysis is foremost among these new tools. New and advanced Weibull techniques are a significant improvement over the original Weibull approach. This workshop, originally developed by Dr. Bob Abernethy, presents special methods developed for these data problems, such as Weibayes, with actual case studies in addition to the latest techniques in SuperSMITH® Weibull for risk forecasts with renewal and optimal component...
2014-12-02 ...
  • December 2-3, 2014 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
  • April 23-24, 2015 (8:30 a.m. - 4:30 p.m.) - Detroit, Michigan
  • August 3-4, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
  • November 23-24, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
Attendees to the seminars held in conjunction with the SAE 2015 World Congress will receive COMPLETE access to Congress activities for only $55 per day. If interested, please contact our Customer Service department at +1.877.606.7323 (U.S. and Canada only) or +1.724.776.4970 (outside U.S. and Canada) to register for this special Congress daily rate. Failure Mode and Effects Analysis (FMEA) is a systematic method for preventing failure through the discovery and mitigation of potential failure modes and their cause mechanisms. Actions are developed in a team environment and address each high: severity,...
2014-11-19
Event
The session is associated with engine and vehicle simulation tasks and their related measurements. Simulation and measurement methodology as well as the simulation and measurement application on development tasks will find a place within the session.
2014-11-19
Event
The session is associated with engine and vehicle simulation tasks and their related measurements. Simulation and measurement methodology as well as the simulation and measurement application on development tasks will find a place within the session.
2014-11-18
Event
The session is associated with engine and vehicle simulation tasks and their related measurements. Simulation and measurement methodology as well as the simulation and measurement application on development tasks will find a place within the session.
2014-11-18
Event
The session is associated with engine and vehicle simulation tasks and their related measurements. Simulation and measurement methodology as well as the simulation and measurement application on development tasks will find a place within the session.
2014-11-18
Event
The session is associated with engine and vehicle simulation tasks and their related measurements. Simulation and measurement methodology as well as the simulation and measurement application on development tasks will find a place within the session.
2014-11-11
Technical Paper
2014-32-0047
Mohamed El Morsy, Gabriela Achtenova
Through PULSE platform for vibration analysis, which is developed as an advanced solution for vibration measurements was developed the robust diagnostic concept (RDC). The PULSE setup is designed to help in fault diagnosis of vehicle gearbox -the main part of vehicle powertrain-. Time Domain, Continuous Wavelet Transformation Technique (CWT), FFT and Order analysis measurements are used for detection of an artificial pitting defect in gear by tracking the gearbox response at accelerated speed and different load. The test stand is equipped with three dynamometers; the input dynamometer serves as internal combustion engine, the output dynamometers introduce the load on the flanges of output joint shafts. The pitting defect is manufactured on the tooth side of gear of the fifth speed on the intermediate shaft. Temperature effect on the vibration measurements has been also investigated to study its effect on the fault diagnosis. The presented concept has an important application in the field of mechanical fault diagnosis.
2014-11-11
Technical Paper
2014-32-0020
Patrick Falk, Christian Hubmann
Abstract Originally developed for the automotive market, a fully automatic real-time measurement tool AVL-DRIVE is commercially available for analyzing and scoring vehicle drive quality, also known as “Driveability”. This system from AVL uses its own transducers, calibrated to the sensitivity and response of the human body to measure the forces felt by the driver, such as acceleration, shock, surging, vibration, noise, etc. Simultaneously, the vehicle operating conditions are measured, (throttle grip angle, engine speed, gear, vehicle speed, temperature, etc.). Because the software is pre-programmed with the scores from a multitude of different vehicles in each vehicle class via neural networks and fuzzy logic formula, a quality score with reference to similar competitor vehicles is instantly given. This tool is already successfully implemented in the market for years to investigate such driveability parameters for passenger cars. Due to the fact that electronic systems more and more find their way into the 2-wheeler applications, motorcycle manufacturers are facing a lot of challenges and these are increasing from year to year.
2014-11-11
Technical Paper
2014-32-0128
Francisco Payri, José Javier Lopez, Benjamin Pla, Diana Graciano Bustamante
Abstract Direct injection compression ignited (CI) engines are today's most efficient engine technology, granting efficiencies exceeding 40% for their optimal operation point. In addition, a strong technological development has allowed the CI engine to overcome its traditional weak points: both its pollutant emissions and the gap in specific power regarding its competitor, i.e. the spark ignited (SI) engine, have been noticeably reduced. Particularly, the increase in specific power has led to the downsizing as an effective method to improve vehicle efficiency. Despite the reduction in total displacement, the cylinder displacement of current CI engines is still around 0.5 liters. For some applications (urban light duty vehicles, Range Extenders…) it may be interesting to reduce the engine displacement to address power targets around 20kW with high efficiencies. This paper assesses the thermo- and fluid-dynamic limitations which make challenging extending the application of automotive CI engines to the low power region: Firstly, space limitations for injection and combustion processes.
2014-11-11
Technical Paper
2014-32-0109
Denis Neher, Maurice Kettner, Fino Scholl, Markus Klaissle, Danny Schwarz, Blanca Gimenez
Abstract Electrical power and efficiency are decisive factors to minimise payoff time of cogeneration units and thus increase their profitability. In the case of (small-scale) cogeneration engines, low-NOx operation and high engine efficiency are frequently achieved through lean burn operation. Whereas higher diluted mixture enables future emission standards to be met, it reduces engine power. It further leads to poor combustion phasing, reducing engine efficiency. In this work, an engine concept that improves the trade-off between engine efficiency, NOx emissions and engine power, was investigated numerically. It combines individual measures such as lean burn operation, overexpanded cycle as well as a power- and efficiency-optimised intake system. Miller and Atkinson valve timings were examined using a detailed 1D model (AVL BOOST). Indicated specific fuel consumption (ISFC) was improved while maintaining effective compression ratio constant. However, brake specific fuel consumption (BSFC) rises due to lower IMEP.
2014-11-11
Technical Paper
2014-32-0023
Daniele Barbani, Niccolò Baldanzini, Marco Pierini
Abstract In the study of new solutions for motorcycle passive safety, FE models of full-scale crash tests play a strategic role. The most important issue in the development process of FE models is their reliability to reproduce real crash tests. To help the engineering in the validation phase, a sensitivity analysis of a FE model for motorcycle-car crash tests is carried-out. The aim of this study is to investigate the model response subjected to variations of specific input parameters. The DOE is performed generating a list of simulations (each one composed by a unique combination of 8 parameters) through Latin Hypercube Sampling. The outputs monitored are the Head Injury Criterion (HIC) and Neck Injury Criteria (Nij). The analysis of the results is performed using scatter plots and linear regression curves to identify the parameters that have major impact on the outputs and to assess the type of dependency (linear or non-linear).
2014-11-11
Technical Paper
2014-32-0018
Kenichi Morimoto, Kenichi Tanaka
Abstract There have been a number of attempts to clarify the relationship between motorcycle specifications and shimmy phenomenon. Some of such efforts are based on equations of motion. The methods used in those efforts are suitable for analyzing motions in a fundamental structure. However, when the degree of freedom is large, it is extremely difficult to deliver an equation of motion. Therefore, a practical method cannot be found generally when applying the methods employing equations of motion. We also conducted the analysis of shimmy using multi-body dynamics simulation. The yielded results were useful only for clarifying the differences in shimmy levels among motorcycles. However, they were not helpful to understand the relationships between specifications and shimmy phenomenon. In this study, we focused clarifying these relationships and we took four study steps shown below: 1 Narrowing down the motorcycle specifications affecting shimmy2 Determining physical parameters influential to shimmy3 Investigating how a change of physical parameters affects shimmy using simplified model4 Analyzing how the changes of motorcycle specifications affect the shimmy Following these steps, we clarified the relationships between motorcycle's specifications and shimmy by using only three physical parameters.
2014-11-11
Technical Paper
2014-32-0050
Tomokazu Nomura, Koichiro Matsushita, Yoshihiko Fujii, Hirofumi Fujiwara
To meet growing demands on the fuel economy, various studies have been made to improve thermal efficiency of engines. In spite of such efforts, approximately 30% of fuel energy is still dissipated to the atmosphere finally as cooling loss, through engine parts, coolant and oil. Therefore, if the heat dissipation from the engine is insufficient, the temperature of engine parts rises. An excessively higher engine temperature causes a degradation of engine performance and a deterioration of material strength. Especially in air-cooled engines, there are contradicting demands between the heat dissipation capacity and the light weighted compactness. Therefore, to realize the optimized design for a light and compact engine, a method of a precise temperature prediction is required in the early stage of the development. A number of studies have been made on the cooling performance and the temperature prediction of engines. In many of such studies, temperature of an engine cannot be directly estimated but heat transfer from the engine to the atmosphere and to the coolant are evaluated on the basis of heat transfer coefficients calculated by 3D-CFD.
2014-11-11
Technical Paper
2014-32-0051
Akira Ishibashi, Muneaki Nakamura, Hitoshi Muramatsu
Fuel economy improvement has become the most important issue in automobile engine developments nowadays. For the purpose of improving fuel economy due to the higher thermal efficiency, the enhancement of compression ratio and the reduction of thermal loss through cooling have been conducted widely. Those efforts exerted in the ongoing developments to improve thermal efficiency increase the thermal load on pistons. Considering the reliability of the pistons and anti-knocking capacity of engines, it is necessary to make a better understanding of piston temperature distributions through accurate measurement under various engine operating conditions. Thus, direct and indirect measurement methods have been developed to estimate the actual piston temperature. The direct method, such as linkage-type is not typically available under higher engine speed due to the durability of linkages. The indirect method, such as material hardness-type can neither measure real-time piston temperature nor measure temperature of piston skirts which are thin-walled.    
2014-11-11
Technical Paper
2014-32-0052
Tatsuhiko Sato, Hirotaka Kurita, Akemi Ito, Hideyuki Iwasaki
The frictional force generated between an actual monolithic aluminum cylinder block and a piston / a piston-ring in a firing mode was measured with using a newly developed floating liner device for the first case in the world. The improvement of fuel consumption is the most important issue for engine manufactures from the viewpoint of energy and environment conservation. The piston-cylinder system plays quite important role for the reduction of the engine friction. For the improvement of the frictional behavior of the piston-cylinder system, it is beneficial to observe and analyze the frictional waveforms during an engine operation. In order to meet the above-mentioned demand, the renewed floating liner device was developed. In the newly developed floating liner device, the actual cylinder block itself was used as a test specimen, whereas a thin-walled cylindrical sleeve should be used as the test specimen in the conventional floating liner device. The measured single cylinder was an aluminum monolithic type made of hypereutectic Al-17Si alloy using a high pressure die casting process.
2014-11-11
Technical Paper
2014-32-0054
Toshio Watanabe, Hiroki Sakamoto
It is well known that for high-speed planing craft with outboard motor, cavitation occurs around the lower unit(gear case) and propeller blades. There are several kinds of cavitation; (1)Tip vortex cavitation (2)Hub vortex cavitation (3)Sheet cavitation (4)Cloud cavitation (5)Root cavitation Among them ,Cloud cavitation and root cavitation lead to erosion damage on the surface of lower unit and propeller. To prevent from poor appearance or performance deterioration of outboard motor by erosion damage, It is important to simulate the occurrence of erosion in advance at the design stage. In this paper, we propose the new method of predicting the area that erosion occurs using CFD (computational fluid dynamics). In order to simulate cavitation phenomena, basically, we have implemented the CFD analysis using the barotropic model. But the area that cavitation occurs does not correspond to the position of erosion damage. Therefore, we focus on the bubble nucleus which is due to cavitation. First, we predict cavitation phenomena on the basis of single-bubble motion with Rayleigh plesset model.
2014-11-11
Technical Paper
2014-32-0060
Giovanni Vichi, Luca Romani, Giovanni Ferrara, Luca Carmignani, Francesco Maiani
In the last years, the engineering in the automotive industry has been revolutionized by the continuous research in the reduction of consumption and pollutant emissions. On this topic there is the maximum attention both by the legislative bodies and by the costumers. The more and more severe limitations in pollutant and CO2 emissions imposed by international standards on the engine manufacturers and the increasing price of the fuel force the automotive research to more efficient and ecological engines. The standard approach for the definition of the engine parameters at the beginning of the design process is based on wide open throttle condition although, both in homologation cycles and in the real utilization, engines work mainly in partial load where the efficiency dramatically decreases. This aspect has recently become strongly relevant also for two-wheels vehicles especially for urban purpose. Within this context the authors developed an integrated numerical model, in MatLab Simulink ambient, in order to couple the engine simulation, performed by means of a 1D computer-aided engineering code, with the whole vehicle dynamic behaviour.
2014-11-11
Technical Paper
2014-32-0119
Diego Copiello, Ze Zhou, Gregory Lielens
Abstract This paper addresses the numerical simulation of motorcycle exhaust system noise using a transfer matrix method (TMM) supporting high order analytical acoustic modes representation combined with finite element method (FEM) included in the Actran software, R15. In the state-of-the-art of hybrid TMM/FEM approach the main assumption consists in a 1D plane wave acoustic propagation in the components connections which is intrinsically limiting the maximum frequency of the analysis. In motorcycle exhaust systems this limitation is even stronger because typical geometries exhibit strong curvatures and bends causing the scattering of the acoustic wave into higher order modes. Therefore, results might be erroneous even at frequencies at which only the plane wave is expected to be propagating. The improved transfer matrix method presented in this paper overcomes this limitation allowing to increase the range of applicability of this method. Specifically, the method is theoretically described and then validated on a set of test cases directly derived from a typical motorcycle exhaust system.
2014-11-11
Technical Paper
2014-32-0114
Enrico Mattarelli, Carlo Alberto Rinaldini, Giuseppe Cantore, Enrico Agostinelli
Abstract The paper compares two different design concepts for a range extender engine rated at 30 kW at 4500 rpm. The first project is a conventional 4-Stroke SI engine, 2-cylinder, 2-valve, equipped with port fuel injection. The second is a new type of 2-Stroke loop scavenged SI engine, featuring a direct gasoline injection and a patented rotary valve for enhancing the induction and scavenging processes. Both power units have been virtually designed with the help of CFD simulation. Moreover, for the 2-Stroke engine, a prototype has been also built and tested at the dynamometer bench, allowing the authors to make a reliable theoretical comparison with the well assessed 4-Stroke unit. Even if the optimized design of each one of the two engines is similar to that of existing prototypes, the paper is not intended to be a benchmarking, but a general study, aimed to define the fundamental project guidelines and compare different solutions under the same conditions, including the unavoidable arbitrary hypotheses.
2014-11-11
Technical Paper
2014-32-0127
Hideyuki Ogawa, Gen Shibata, Yuhei Noguchi, Mutsumi Numata
Abstract Diesel-like combustion of an emulsified blend of water and diesel fuel in a constant volume chamber vessel was visualized with high speed color video, further analyzing with a 2-D two color method and shadowgraph images. When the temperature at the fuel injection is 900 K, here while the combustion with unblended diesel fuel in the vessel is similar to ordinary diesel combustion with diffusive combustion, combustion with the emulsified fuel is similar to premixed diesel combustion with a large premixed combustion and very little diffusive combustion. With the emulsified fuel the flame luminosity and temperature are lower, the luminous flame and high temperature regions are smaller, and the duration of the luminous flame is shorter than with diesel fuel. This is due to promotion of premixing with increases in the ignition delay and decreases in the combustion temperature with the water vaporization. The soot number density (total KL factor) with the water emulsified fuel is smaller than with the diesel fuel.
2014-11-11
Technical Paper
2014-32-0126
Giovanni Vichi, Isacco Stiaccini, Alessandro Bellissima, Ryota Minamino, Lorenzo Ferrari, Giovanni Ferrara
Abstract A condition monitoring activity consists in the analysis of several information from the engine and the subsequent data elaboration to assess its operating condition. By means of a continuous supervision of the operating conditions the internal combustion engine performance can be maintained at design-level in the long term. The growing use of turbocharger (TC) in automotive field suggests to use the TC speed as a possible feedback of engine operating condition. Indeed, the turbocharger behavior is influenced by the thermo and fluid-dynamic conditions in the cylinder exhaust port: this feature suggests that the TC speed could provide useful data about the engine cycle. In this study the authors describe a theoretical and numerical analysis focused on the TC speed in a four stroke turbo-diesel engine. The purpose of this study is to highlight whether the TC speed allows one to detect the variation of the engine parameters. In addition, when the TC speed alone is not sufficient to detect the variation in the engine operating conditions, the proper set of additional, easy-to-measure, engine parameters is studied to univocally identify the causes of the variation.
2014-11-10 ...
  • November 10-13, 2014 (3 Sessions) - Live Online
  • June 15-19, 2015 (3 Sessions) - Live Online
  • December 14-17, 2015 (3 Sessions) - Live Online
Training / Education Online Web Seminars
Design Review Based on Failure Modes (DRBFM) is a methodology focused on change management and continuous improvement. It centers on early prevention and engineering knowledge, eliminating time spent debating ranking systems, waiting for lead engineers to document and list their concerns, identifying what types of concerns are open for discussion and resolution, and brainstorming without any actionable closure. This web seminar will explain all phases of the DRBFM methodology and provide details on how to accomplish the specific steps. With the Design Review Based on Failure Modes (DRBFM) and Design...
2014-11-10 ...
  • November 10-11, 2014 (8:30 a.m. - 4:30 p.m.) - Chennai, India
  • November 13-14, 2014 (8:30 a.m. - 4:30 p.m.) - Pune, India
  • April 23-24, 2015 (8:30 a.m. - 4:30 p.m.) - Detroit, Michigan
  • October 22-23, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
Attendees to the seminars held in conjunction with the SAE 2015 World Congress will receive COMPLETE access to Congress activities for only $55 per day. If interested, please contact our Customer Service department at +1.877.606.7323 (U.S. and Canada only) or +1.724.776.4970 (outside U.S. and Canada) to register for this special Congress daily rate. 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...
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