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Viewing 1 to 30 of 2541
2015-04-22
Event
Visual perception continues to be a critical aspect of overall driver performance. This session welcomes paper offers highlighting new developments designed to provide better support for driver rearward vision, better understanding of how to measure light and its effects on drivers’ eyes, and better understanding of how drivers accomplish the visually difficult task of negotiating intersections.
2015-04-22
Event
LED technology advancement continues in the past year. This leads to broader lighting applications. The latest studies presented in this session cover design strategy, thermal management and reliability related testing. Other topics in this session also centered on continuing improvement for lighting performance and product safety.
2015-04-21
Event
Automotive glazing, while remaining a somewhat stable part of vehicle design, is contributing to passenger comfort in new ways, and is subject to an ever-expanding web of regulation around the world.
2015-04-21
Event
The scope of the Wiper System session encompasses the design, analysis and experiments related to windshield wipers and their associated components. Engineers and researchers in the field are encouraged to submit their innovative ideas and findings in empirical studies, numerical simulations as well as fundamental advancements dealing with material, mechanics, tribology, mechanism and heat transfer.
2015-04-14
Technical Paper
2015-01-1705
Miguel Hurtado, Amine Taleb-Bendiab, Julien Moizard, Patrice M. Reilhac, Heinz Mattern
Current market trend indicates an increased interest in replacing mirrors by camera monitoring systems (CMS) to reduce CO2 emissions while at the same time improve driver visibility in future cars with a more aerodynamic profile. This improvement in visibility is expected to be more beneficial during the night or under extreme weather conditions. A CMS is an advanced system composed of an electronic imager, a display, and an intelligent electronic control unit. The CMS is intended to provide at least the same level of functionality of mandatory and legally prescribed interior and exterior mirrors in vehicles as specified in various international regulations and standards such as FMVSS 111 and SAE J985. Such system must take into consideration not only the required external field of view (FoV), but also the physical constraints of the human operator, i.e. visual acuity. This captured information is subsequently displayed to the driver inside the cockpit.
2015-04-14
Technical Paper
2015-01-1702
Alex Wang, Jung Hsien Yen
This paper presents a novel technology to achieve world lowest power (4W) FOG lamp by single LED design which is much enhanced than the existing 2-3 LEDs solutions. This design saves 92.7% energy than conventional Halogen lamp(55W) and saves 38.4% than existing LED FOG lamp(6.5W). The optical design adopts the optimized multifaceted reflector, with precise and unique optimization design scheme, we are able to generate a very sharp cut-off line with a 3.2W LED to enable stronger light penetration in low vision weather condition. The efficiency of multifaceted reflector optics in this study is 50.9% which is 27% higher than the existing reflector design. Design details, anti-block skills and the manufacturing tolerance control are analyzed in this paper. The total light output of the LED fog lamp is 210lm, the L6-line minimal is 4200cd above the ECE R19 requirement of 2700cd.
2015-04-14
Technical Paper
2015-01-1701
Luciano Lukacs
The challenges around global products have been lately one of the key challenges for the Lighting community. This paper will present a survey which was held with costumers from China, India, Europe and Brazil understanding the difference and similarities regarding the lighting attributes. it brings also a discussion how to develop a lamp globally that fulfils everyone's needs and addresses potential trade-offs in design and performance.
2015-04-14
Technical Paper
2015-01-1544
Sunil patil, Robert Lietz, Sudesh Woodiga PhD, Hojun Ahn, Levon Larson, Ronald Gin, Michael elmore, Alexander simpson
One of the passive methods to reduce drag on the unshielded underbody of a passenger road vehicle is to use a vertical deflectors commonly called as air dams or chin spoilers. These deflectors reduce the flow rate through the non-streamlined underbody and thus reduce the drag caused by underbody components protruding in to the high speed underbody flow. Air dams or chin spoilers have traditionally been manufactured from hard plastics which could break upon impact with a curb or any solid object on the road. To alleviate this failure mode vehicle manufacturers are resorting to using soft plastics which deflect and deform under aerodynamic loading or when hit against a solid object without breaking in most cases. This report is on predicting the deflection of soft chin spoilers under aerodynamic loads. The aerodynamic loads deflect the chin spoiler and the deflected chin spoiler changes the fluid pressure field resulting in a drag change.
2015-04-14
Technical Paper
2015-01-1378
Takeshi Sasaki, Tatsuya Ohmaru, Taisuke Goto
We developed a windshield washer system that enhances washing performance while reducing the amount of washer fluid consumed. This system reduces the time required to remove dirt and reduces stress on users. To enhance washing efficiency, we studied how the windshield wiper and washer remove dirt. The washer fluid contacts and floats the dirt from the glass surface then wipes it away with the wiper blade. The amount of windshield washer fluid required and the time after the windshield washer fluid floats the dirt from the windshield and wipes it away were analyzed. When mounting the system in a vehicle, the required amount of windshield washer fluid and the required time were correlated to the washer fluid spray and control. The washer spray format, the target amount of washer fluid that contacts the glass surface and the target wiping timing can be achieved by locating the windshield washer nozzle near the center of the wiper blade.
2015-04-14
Technical Paper
2015-01-1330
Yoshiyuki Tosa, Hiroyuki Mae
The passenger airbag hits the windshield when it deploys, causing the impulse force to the windshield. To protect passengers, we must adequately support the airbag between the windshield and the instrument panel. We must not fracture the windshield deploying the airbag. We reviewed methods to simulate the stress on the windshield during deployment. This research predicts the dynamic strain on the windshield from deploying the airbag without vehicle tests. Deployment is fast enough to ignore spatial difference in the patterns of the pressure time histories. In this study, the prediction method consists of a deployment test and an FE simulation. The simple deployment test measures the dynamic pressure distribution between the airbag and the flat panel simulating the windshield.
2015-04-14
Technical Paper
2015-01-1304
G Karthik, K V Balaji, Rao Venkateshwara, Bagul Rahul
This paper describes about recycled polyethylene terephthalate(R-PET) material for canopy strip part in automotive application. This recycled PET is a compounded material which is made out of used PET bottles and it is compounded with glass fibre to meet the product functional requirements. Canopy strip is a structural exterior part which requires better mechanical and thermal properties. The major function of this part is to act like a structural frame to hold the canopy sheet which is present at the both sides of the vehicle. Generally, PET bottles are use and throw product. PET is inert and takes an extremely long time to degrade so the empty bottles would also take an enormous amount of space in landfills which will directly affect rain water percolation. This compounded material is one of the sustainable solution for the environment where the waste bottles get converted to useful automotive parts.
2015-04-14
Technical Paper
2015-01-0564
Sung wook Moon, Byunghyun Kang, Jaeyoung Lim, Byoung-Ho Choi
In a car accident involving pedestrians, head injury occurs very frequently as head of the pedestrian hits the windshield. The head injury criterion (HIC) obtained through the windshield impact test is used to evaluate pedestrian injury and car manufacturers are trying to meet the criterion and lightweight at the same time. However, there are some difficulties in the windshield impact test like a large scatter of the test data or windshield shape-dependent property of the test. These problems make it very difficult to obtain the meaningful result from single test and thus, test should be done several times. In this study, lab-scale windshield impact test is done by using modified Instrumented dart impact (IDI) tester. Test was carried out by switching test conditions like impact speed, size of the headform and specimen thickness.
2015-04-14
Technical Paper
2015-01-1558
Amir Kharazi, Edward Duell, Austin Kimbrell, Ann Boh
Unsteady flow over automotive side-view mirrors may cause flow-induced vibrations of the mirror assembly which can result in blurred rear-view images, adversely affecting marketability and driver safety, as well as customer comfort and quality perception. Prior research has identified two mechanisms by which aerodynamically induced vibrations are introduced in the mirror. The first mechanism is unsteady aero pressure loading on the mirror face due to the unsteady wake, causing direct vibration of the mirror glass. The second mechanism, and the focus of this study, is a fluctuating loading on the mirror housing caused by an unsteady separation zone on the outer portion of the housing. A time-dependent Computational Fluid Dynamics (CFD) methodology to correctly model mirror wake behavior, and thereby predict flow-induced mirror vibration to improve performance estimations, was developed.
2015-04-14
Technical Paper
2015-01-0673
Rohit Ray, Nagarjun Jawahar
Automotive OEM’s are looking to develop plastic parts with maximum life and durability through virtual simulations with help of CAE tools, thereby saving the mold cost, material cost and time. The design constrains would be manufacturability, loads, boundary condition and aesthetics. This work involves the multi-discipline approach to virtually visualize the effect of fluid structure interaction due to splashing on the rear fender of a motorcycle which acts as mud guard. This study shows effect of splashing of water over rear fender on wet roads. First, the pressure developed on the rear fender due to impingement of water on surface is obtained through a multiphase volume of fluid analysis using CFD software Fluent. Secondly, these pressure values are taken as input in Abaqus software and the part is analyzed for its durability along with road excitations.
2015-04-14
Technical Paper
2015-01-0590
Dae-Un Sung, Young Hyun Ryu, Soon Cheol Park
Recently, many kinds of new technology systems are adapted to a new developing vehicle. However the field usage information of a new technology system could not be easily obtained because this system has not been used by customers. It is not easy to evaluate the reliability and durability of these kinds of new systems. In this research, the durability test mode of AFLS (Adaptive Front Lightning System) with LED (Light Emitting Diode) lamp has been developed. First of all, The failure modes were analyzed by considering failure mechanism for each component. The thermal load, vibration, swiveling movement and electrical loads were investigated. The RLDA (Road Load Data Acquisition) technique was used for obtaining the vibration and temperature of LED AFLS in proving ground. The vibration test mode was developed by PSD (Power Spectral Density). The thermal load effect on life time of LED was investigated.
2015-04-14
Technical Paper
2015-01-1700
John D. Bullough
Warning lights and beacons on service vehicles such as maintenance trucks, tow trucks, utility service vehicles and delivery vehicles are an important line of defense for the workers who operate them. These lights can also contribute to visual chaos making it difficult to navigate through a work zone location. Research on the flashing configuration and spatial and temporal coordination of warning lights that adapt to ambient conditions and situations will be described, leading to recommendations for preliminary performance specifications.
2015-04-14
Technical Paper
2015-01-1703
John D. Bullough
Assessing the safety impacts of vehicle forward lighting is a challenge because crash data do not always contain details necessary to ascertain the role, if any, of lighting in crashes. The present paper will describe several approaches to evaluating the safety impacts of lighting using naturalistic driving data. Driving behavioral data and records of near-miss incidents might provide new opportunities to understand how forward lighting improves traffic safety.
2015-04-14
Technical Paper
2015-01-1704
Dee Kivett, John Smith
Several emerging technologies hold great promise to improve the 360-degree awareness of the heavy vehicle driver. However, current industry-standard evaluation methods do not measure all the comprehensive factors contributing to the overall effectiveness of such systems. As a result, industry is challenged to evaluate new technologies in a way that is objective and allows the comparison of different systems in a consistent manner. This research aims to explore the methods currently in use, identify relevant factors not presently incorporated in standard procedures, and recommend best practices to accomplish an overall measurement system that can quantify performance beyond simply the field of view of a driver visibility system. We introduce a new metric, “Clarity of View,” that incorporates several important factors for visibility systems including: gap acceptance, response time, and behavior accuracy.
2015-04-14
Technical Paper
2015-01-1377
Hiroshi Yokoyama, Atsushi Otani, Naoyuki Shirota, Takao Umezawa
Windshield wipers and washers are essential for safety driving of motor vehicles and expected to steadily provide a good field of vision under various weather and environment conditions. However, there is a concern that washers are likely to be affected by several factors such as fast air flow at high speed driving and high washer fluid viscosity at low temperature, which may result in unsatisfactory distribution of washer fluid onto windshields. As another example, particularly-high cleaning performance is required while vehicles are running on a winter road with mud and salt. Conversely, if these concerns are resolved, washers can contribute more to vehicle safety. Thus, we have developed a washer nozzle with a self-oscillating flow passage focusing on distributing appropriate amount of washer fluid.
2015-04-14
Technical Paper
2015-01-1376
Thomas Leonhard, Thomas Cleary, Michael Moore, Shane Seyler, W Keith Fisher
Driven by future emission legislation and consumer requirements fuel efficiency improvement continues to be a focus area for the automotive industry. OEMs are pursuing various technical paths in parallel to meet upcoming CO2 and fuel economy targets. Lightweight designs, being one of them, are becoming increasingly important. In that context automotive glazing offers an attractive potential for vehicle weight reduction above the belt line. This potential grows as the application of laminate windows is expanding from windshields into other vehicle openings. Utilizing conventional soda-lime glass designs for these laminate windows typically comes along with a weight penalty. A new concept using ultrathin chemically strengthened Corning® Gorilla® Glass in automotive glazing laminates has the potential to break that design challenge, enabling the advantages of laminates as well as weight savings. This concept is being evaluated by leading OEMs.
2015-03-30
Technical Paper
2015-01-0106
Zhe Yu, Wenjie Qin, Qingdong Hou, Mu Tang, Yang Ran
Wiper noise generated in the process of wiping is one of the main influence factors affecting the driving comfort. Since the dynamic pressure of the contact between a blade and a windshield glass is difficult to be simulated or measured, which make it is extremely particularly difficult to predicte the degree of the wiper noise. To solve this problem, in this paper, as the reversal noise problem of a passenger-vehicle windscreen wiper system is concerned, the system dynamic models of the both wipers on the sides of the driver and copilot were built on the basis of consideration of the blade deformation and the elastic contact between the blades and the windscreen glass, which including the crank pivot, the four linkage mechanism, the wiper blades, the wiper arms and the windscreen glass.
2015-03-30
Technical Paper
2015-01-0108
Qingdong Hou, Wenjie Qin, Zhe Yu, Mu Tang, Yang Ran
With the increasing of ride comfort requirements for modern vehicles, the noise generatingbefore and after the windshield wiper reverses direction becomes more noticeable.In this paper,the impacts of some factors---the preload of wiper lever spring, the torsional stiffness of blade neck and the flexible connection between the wiper arm and the wiper lever on the vibration excitation appliedto the front windshield are analyzed based on the multi-body dynamic modelof wiper system (includingthe crank pivot, the four linkage mechanism, the wiper blades, the wiper arms and the windscreen glass) which has been established by taking elastic contact between the wiper blade and the front windshieldinto consideration.
2015-01-20
WIP Standard
ARP6402B
The purpose of this document is to provide certain basic considerations and design criteria for installation of LED landing, runway turnoff, and taxiing light systems for night operation. Criteria for recognition lights are also included.
Viewing 1 to 30 of 2541

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