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Viewing 271 to 300 of 9398
2016-02-01
Technical Paper
2016-28-0233
Sindhu Ls, Vishwas Vaidya
Abstract The OEM's aim is to reduce development time and testing cost, hence the objective behind this work is to achieve a flexible stateflow model so that changes in the application during supply chain or development, on adding/deleting any switches, varying timer cycle, changing the logic for future advancements or else using the logic in different application, would end in minimal changes in the chart or in its states which would reflect least changes in the code. This research is about designing state machine architecture for chime/buzzer warning system and wiper/washer motor control system. The chime/buzzer stateflow chart includes various input switches like ignition, parking, seat belt buckle, driver door and speed accompanied with warning in the form of LED, lamp and buzzer. The logic is differentiated according to gentle and strong warning. Various conditions and scenarios of the vehicle and driver are considered for driver door and seat belt which is resolved in the chart.
2016-02-01
Technical Paper
2016-28-0143
K. Krishnamoorthy, V. Saishanker
Abstract With increasing growth of vehicular population, there is an increasing demand for raw materials. This has added strain to the available resources, which is becoming more and more unsustainable. As a result, search for sustainable materials are continuously happening in our industry and there is a strong focus from everyone to incorporate more and such materials. One way of doing so, is by blending naturally available materials like fibers, with polymers. In this study, naturally available Coconut fibers have been blended successfully with Polyurethane foam, thereby improving the green footprint of the vehicle. Coconut fibers are naturally occurring fiber extracted from the husk of the coconut. Polyurethane foam is the most versatile polymeric foam used in several places of automobile for reducing the Noise, Vibration & Harshness. The composite was manufactured using reaction injection molding technique by reacting polyol with iso-cyanide.
2016-02-01
Technical Paper
2016-28-0239
Sri Siva Sai Meduri, V Sundaram, S. Sathish Kumar
Abstract Noise reduction is a major concern in the recent times and global automotive industries evolve new technology to meet the norms. The major contribution to vehicle’s interior noise is from engine, intake, exhaust, structure, aerodynamic and road. In recent days, more attention is given to other sources of noises which are dominant. Purge noise is one such noise which has more impact to the interior noise because the cabin has become much quieter due to the latest advancements and new technologies used in vehicle design and development. Using the air dampening device in the vapor line is one of the techniques to minimize the purge noise. In this paper a study is carried out in order to optimize the design of air dampening device which meets the requirements. Fuel vapors that got collected in canister will purge through vapor line and are controlled by purge valve before they enter the engine.
2016-02-01
Technical Paper
2016-28-0193
Sankalp Talegaonkar, Mohammad Rafiq B. Agrewale, Kamalkishore Chhaganlal Vora
Abstract The Exhaust Noise is one of the major noise pollutants. It is well-known that for higher noise reduction, the engine has to bear high back pressure. For a race car, back-pressure plays a major role in engine's performance characteristics. For a given condition of engine rpm & load, conventional muffler has a fixed value of back-pressure and noise attenuation. Better acceleration requires low back-pressure, but the exhaust noise should also be less than the required (Norm) value (110 dBA). This contradicting condition is achieved here by using a ‘Butterfly Valve’ in this novel exhaust muffler. The butterfly valve assumes 2 positions i.e. fully open & fully closed. When the valve is fully closed, the noise reduction will be higher, but the back-pressure will also shoot up. When open, noise reduction will be less and so the back-pressure. So, when better performance is required, the valve is opened and back-pressure is reduced.
2016-01-30
Article
GKN believes that flight tests will prove 8% wing drag reduction in natural laminar flow wing concepts.
2016-01-29
Article
Electric propulsion is on the verge of causing the biggest changes in aviation since the advent of the jet engine.
2016-01-27
Article
A new Michelin tire is an all-season street grabber with technical attributes derived from endurance racing.
2016-01-20
Article
System offers fast response and eliminates piston drag, but hydraulic output to front wheels is still needed for larger cars.
2016-01-07
Article
Ford has begun evaluating a new, smaller-size, lower cost LiDAR that will help enable vehicle autonomy at SAE Levels 4 and 5.
2016-01-06
Magazine
Time to get personal Industry engineers are combining apps, voice, the cloud, and other technologies such as artificial intelligence to enable drivers to customize their vehicles and anticipate their needs. Technology report GM and TARDEC co-developing fuel cell powered Chevrolet Colorado for military evaluation vehicles and anticipate their needs. Global vehicles Sports cars take center stage in Tokyo
2016-01-03
Article
Purdue University has developed a new system that allows a 3D printer to produce functioning products with enclosed electronic and motorized components and customized devices such as a computer mouse molded to a user's hand.
2015-12-31
WIP Standard
J670
The vehicle dynamics terminology presented herein pertains to passenger cars and light trucks with two axles and to those vehicles pulling single-axle trailers. The terminology presents symbols and definitions covering the following subjects: axis systems, vehicle bodies, suspension and steering systems, brakes, tires and wheels, operating states and modes, control and disturbance inputs, vehicle responses, and vehicle characterizing descriptors. The scope does not include terms relating to the human perception of vehicle response.
2015-12-22
Article
A new test service introduced by Bal Seal Engineering offers verified performance results for the company’s low-friction spring-energized seals used in rotary/face applications.
2015-12-22
Article
Messring, in cooperation with carbon fiber specialist Wolf Composite Solutions, has developed a new hybrid solution that enables testing of autonomous emergency braking (AEB) systems according to both U.S. and EU procedures.
2015-12-20
Standard
ARP1839
This Aerospace Recommended Practice (ARP) is a general overview of typical airborne engine vibration monitoring (EVM) systems applicable to fixed or rotary wing aircraft applications, with an emphasis on system design considerations. It describes EVM systems currently in use and future trends in EVM development. The broader scope of Health and Usage Monitoring Systems, (HUMS) is covered in SAE documents AS5391, AS5392, AS5393, AS5394, AS5395, AIR4174. This ARP also contains the essential elements of AS8054 which remain relevant and which have not been incorporated into Original Equipment Manufacturers (OEM) specifications.
2015-12-18
Article
Sx-STG from IPETRONIK is an eight-channel multi analog measuring module with sensor supply for various applications inside the vehicle cabin.
2015-12-18
Article
Kvaser has introduced the PCIEcan 4xHS, an integrated controller area network (CAN) card that adds four high-speed CAN channels to any standard computer board with PCI Express capability.
2015-12-04
WIP Standard
J1355
This SAE Recommended Practice is applicable for determining the thickness of various resilient materials, such as insulating padding used in the automotive industry. This test method is intended to establish a uniform procedure for determining the thickness of various resilient thermal and acoustical insulating pad materials.
2015-12-04
WIP Standard
J2846
This SAE Recommended Practice describes a laboratory test procedure for measuring the acoustical performance of a system consisting of a body cavity filler material formed into a rectangular cross-section channel. Materials for this test may include both heat reactive and chemically reactive products, with or without a nylon or other shelf to simulate a baffle in an application, or a combination of body cavity filler and aluminum foil to enhance the performance. These materials are commonly installed in transportation systems such as ground vehicles, and thus reduce the noise propagation through the rails, rockers, and pillar/posts. This document is intended to rank order the acoustical performance of materials for application on channels using general automotive steel, such that the effects of sealing of pinch welds in addition to the material could be easily evaluated. The acoustical performance is expressed in terms of insertion loss (IL) which is described below.
2015-12-01
Magazine
Uncertainty quantification The technique is a must for next-generation simulation tools. Oil-pump sizing Researchers from Hinduja Tech investigate options for low friction and power consumption. The future of Indian commercial aviation The growth in traffic that airport modernization has supported has also made a significant contribution to the local and national economies, while the improved infrastructure has been positive for the perception of India in the global market. Driving EVs toward lower cost The race ison to reduce battery and electric-drive systems cost while improving efficiency. Powering on Rolls-Royce's Chief Engineer discusses new technologies that inspire current R&D design and evaluation work as part of its strategic roadmap for future big commercial programs. HMIs extend beyond the cab Telematic functions are being integrated into multi-function user interfaces.
2015-11-25
Article
Claimed to be more package-efficient than conventional portable emissions measurement systems, the Firefly will hit the market as early as mid-2016.
2015-11-24
Article
DTS offers the ARS PRO high-performance angular rate sensor, which is designed for a range of applications including vehicle handling, crash, biomechanics, and even high-rate ballistics testing.
2015-11-24
Standard
J2641_201511
This SAE Information Report provides basic information about the issues surrounding the administration of stationary, infield sound testing of snowmobiles. The information provided herein is meant to enhance safety, improve the environment and promote uniform testing.
2015-11-24
Standard
J2567_201511
This SAE Recommended Practice establishes the test procedure, environment and instrumentation for determining the sound levels of snowmobiles in the stationary test mode. This test method is intended to provide an accurate measurement of exhaust and other engine noise and may be used to evaluate new and in-use snowmobiles to determine compliance with noise control regulations. Sound level measurements obtained with this test method are not intended as an engineering determination of overall machine noise. For this purpose, the use of SAE J192 is recommended.
2015-11-19
Article
GM recently announced that its fuel-cell engineering team is working with the U.S. Army TARDEC to develop a prototype pickup truck with a commercial hydrogen fuel-cell powertrain that is capable of meeting U.S. military duty cycles. The vehicle will be put into daily use and driven by soldiers for 12 months.
2015-11-19
Article
It is possible to look at Audi’s new-generation aluminum/carbon fiber-constructed V10 R8 supercar in two ways: its entire technology comprises 50% of the latest R8 LMS (Le Mans Series) GT3 racecar; alternatively, the racecar comprises 50% of the road car. Oliver Jarvis, Audi’s motorsport team driver, provides insights to both cars.
2015-11-17
Technical Paper
2015-32-0747
Hiroko Oshima, Hilmi Bin Hela Ladin, Akihito Ito, Nobutaka Tsujiuchi, Takayuki Koizumi
This paper describes a measurement points' placement technique for the sound source identification using inverse acoustic analysis. In order to reduce noise in NVH problem for various kinds of machines including small size engine, it is necessary to identify the sound source. The inverse acoustic analysis is a technique that is effective for the sound source identification.[1,2] The inverse acoustic analysis identifies a surface vibration of an object by measuring the radiated sound and solving the inverse problem. Nakano et al. researched about the location of sound pressure measurement points for accurate improvement.[3] They clarified that the sound pressure measurement points on the concentric circle gave more accurate surface vibration than the measurement points on the square lattice.
2015-11-17
Technical Paper
2015-32-0774
Hilmi Bin Hela Ladin, Nobutaka Tsujiuchi, Katsuhiko Kuroda, Akihito Ito
This paper describes the comparison method of input powers and contribution rates from vibration sources to a small power generator's enclosure represented by a thin-walled plane structure determined by Statistical Energy Analysis (SEA) and Transfer Path Analysis (TPA). In the pursuit of efficient ways to analyze the design dynamics of small machines such as a small power generator, it is important to identify information and dynamics of input power sources during machine operation. SEA and TPA are two of the most efficient methods in identifying the dynamics of a structure during machine operation. SEA is used for systems with many resonant modes, and predicted results are based on space averages. On the other hand, TPA is based on estimation of a frequency response function between an excitation point and a response point. In this study, we proposed a method to compare SEA evaluated by power injection method and TPA evaluated by matrix inversion method.
2015-11-17
Technical Paper
2015-32-0727
Akiyuki Yamasaki, Teruaki Yamamoto, Kazumasa Hisada, Hiroshi Nakahara, Takumi Kawasaki
This paper describes an engine mount system that achieves reduced vibration on an industrial type utility vehicle. First the vibration level and direction of the inline three cylinder engine installed in the vehicle was analyzed and based on these results a mount layout that leads to a reduced level of vibration felt by the passengers was developed. Next, this was applied on an actual vehicle and spring characteristics were designed for each mount. The actual spring constants were set such that when considering the engine to be a rigid body, the resonance frequency thereof occurs at an engine speed lower than idle and in addition were set to ensure component strength relative to driving forces and inertial forces that act while the utility vehicle is being driven. Lastly, achievement of significant vibration reduction was confirmed on an actual vehicle showing that this engine mount system is effective at reducing vibration.
2015-11-17
Journal Article
2015-32-0739
Hiroshi Kuribara, Hiroshi Horikawa, Takashi Teraguchi, Takanori Nagata, Daisuke Kitamura
A method applicable in the design stage to predict fatigue strength of a motorcycle exhaust system was developed. In this prediction method, a vibrating stress, thermal stresses, stresses resulting from the assembling of the exhaust system components and a deterioration of fatigue strength of materials originated from high temperature were simultaneously taken into account. For the prediction of the vibrating stress, flexible multibody dynamics was applied to get modeling accuracy for vibration characteristics of the entire motorcycle and the exciting force delivered from engine vibrations. The thermal conduction analysis and the thermal deformation analysis based on finite element method (FEM) were applied for the prediction of thermal stresses in the exhaust system components. The temperature distribution on the surfaces of the exhaust system components is required for calculations of the thermal stresses.
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