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Viewing 91 to 120 of 9220
2016-03-27
Technical Paper
2016-01-1724
Jyotirmoy Barman
In order to meet tightening emission regulations and increasing needs of lower fuel consumption and emissions, turbocharging is playing a vital role in internal combustion engine development. It is therefore possible to increase engine specific power output as well as reduce fuel consumption. Turbo matching is the critical and important parameter for turbocharging systems to an internal combustion engine plays an important role in engine development to meet stringent emission legislation and customer demands such as specific power output and fuel economy. Turbocharger matching is meant by selection of a compressor and turbine combination in order to meet the required boosting pertaining to prescribed band of engine operations. An effort is also done to optimize this combination. It’s expected that the compressor so chosen should offer maximum possible efficiency during crucial engine operation zones while engine running at full load.
2016-03-27
Technical Paper
2016-01-1734
G. Magendran
The input shafts are conventionally developed through Hot forging route. Considering upcoming new technologies the same part was developed through cold forging route which resulting in better Mechanical properties than existing hot forging process.Generally the part like Input shaft which having gear teeth, splines etc., will be manufactured through Hot forging process due to degree of deformation, availability of press capacity, diameter variations etc., This process consumes more energy in terms of electricity for heating the bar and also creates pollution to the atmosphere. Automotive input shaft design modified to accommodate cold forging process route to develop the shaft with press capacity of 2500T which gives considerable benefit in terms of mechanical and metallurgical Properties, close dimensional tolerances, less machining time, higher material yield when compared to hot forging and metal cutting operation.
2016-03-27
Technical Paper
2016-01-1733
Jyotirmoy Barman, Sumit Arora, Rizwan Khan, Munendra Parashar
An efficient after treatment technique is driven by the need to maintain strict emission norms for heavy-duty and medium-duty ground vehicles. SCR being an advanced active emission technology system for diesel engine, is one of the most cost-effective and fuel-efficient technologies available for complying with the stringent NOx emission legislations. The design of the SCR system involves catalyst selection, complex controller development like urea dosing strategy and the interaction between engine setup and after treatment system. For this purpose, the SCR model must be computationally efficient to evaluate the complete efficiency along with to take care for the NH3 slip also. The SCR model was prepared with respect to SCR inlet temperature and ratio of NOx and ammonia to study the behavior of NOx conversion efficiency keeping consideration of NH3 slip also required for optimizing the calibration.
2016-03-27
Technical Paper
2016-01-1735
Suresh Kumar Kandreegula, Sonu Paroche, Sayak Mukherjee, Diwakar Ayyar, Umashanker Gupta
To compete with the current market trends there is always a need to arrive at a cost effective and light weight designs, hence the need for upgrading the Existing/Proven Integral Connecting Rod to Fracture Split Connecting Rod. This technique provides gains as weight reduction and consequently reducing noise and vibration due to the decrease of the oscillating mass from the system. Using the proposed fracture split connecting rod, it is estimated that cost savings of up to 10%, reduction in weight and better fatigue performance (25% - 30%) can be achieved. For this, we have used simulation tools to reduce number of physical tests and thereby achieving considerable reduction in design and development time and cost. High carbon alloy steel used for manufacturing Fracture Split connecting rod and it doesn't require additional heat treatment after hot forging.
2016-02-03
Article
Britain has established a real-world test highway for connected and autonomous vehicle technologies. JLR is one of the companies investing in the 66-km-long R&D route.
2016-02-02
Article
Imetrum’s precision, noncontact 3D measurement system, the Precision Displacement Tracker, slashes setup times and provides richer data sets without compromising measurement resolution or sampling speed.
2016-02-02
Article
Intertek’s Milton Keynes Transportation Technologies laboratory has developed a portable vehicle exhaust emissions testing system that enables manufacturers to report real-world driving emissions.
2016-02-02
Article
EngineLab’s EL129 control units for engine simulation and testing have a range of input and output options and can be adapted for flexible control system development.
2016-02-01
Technical Paper
2016-28-0039
Vijay Antony John Britto, Sudipto Karmakar, Madhan Muthuveeraswamy, Balasubramanian Natarajasundaram
NVH refinement of a vehicle with light weight structure[1] focusing on fuel efficiency is a challenging task. Resonance between the air volume of the cabin and revolving engine excitation generates booming. This booming noise affects the annoyance of sound quality in the cabin. Engine torque variation, penetration of air intake and exhaust system, and tire unbalance caused by engine auxiliary resonance are the most influential sources for high speed booming. This paper describes the booming noise level reduction between 100-200 Hz during high RPM driving conditions in one of the passenger cars. Detailed CAE iterations and testing has been done to identify the root cause of the booming noise. By considering the cost vs NVH performance trade off, the optimized NVH countermeasure has been chosen and validated. Modal analysis, operational deflection shapes, Input point inertance and Noise transfer function techniques have been used for root-cause analysis and counter measure proposal.
2016-02-01
Technical Paper
2016-28-0068
Nishant Kataria, Kota Nageswara rao Puli, Pankaj Maheshwari, Sandeep Raina
Abstract In automotive seating, there are multiple applications wherein parts have relative motions. During the relative motion of parts, noise is generated due to friction which can be irritant to the end user. This paper focuses on, one such application where conventional noise reduction solutions like grease application are not very effective. Typically, Seats can have two types of Head Restraint, a) Adjustable, b) Non Adjustable. In Adjustable type of Head restraint, during adjustment by the end user, head restraint rod rubs against the metal plate inside the locking guide. This creates friction and that in turn results in noise. The paper focuses on understand the phenomenon of noise, identifying the root cause and studying about potential solutions to reduce the noise to acceptable level. In this paper, parameters affecting the noise are studied and evaluated.
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
2016-28-0193
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.
2016-02-01
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
2016-28-0233
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.
2016-01-30
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
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.
2015-12-04
WIP Standard
J1324
This SAE Recommended Practice provides test methods for determining the characteristics of acoustical and thermal materials. Where applicable, methods of test developed by SAE and ASTM have been referenced.
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.
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