Browse Topic: Headlamps

Performance Requirements for Road Illumination Devices Using Light Emitting Diode (LED) Sources

J2650_202104 (Current)

04/14/2021

Road Illumination Devices Standards Committee

Headlamp Cleaners

J2111_202008 (Current)

08/26/2020

This SAE Recommended Practice provides test procedures, performance requirements, and guidelines for cleaners intended for use on motor vehicles.

Road Illumination Devices Standards Committee

Motorcycle and Motor Driven Cycle Electrical System Maintenance of Design Voltage

J392_202005 (Current)

05/26/2020

This SAE Recommended Practice pertains to electrical systems of motorcycles both with and without batteries.

Motorcycle Technical Steering Committee

Front Fog Lamp

J583_202005 (Current)

05/13/2020

This SAE Standard provides test procedures, performance requirements, design guidelines, and installation guidelines for front fog lamps.

Road Illumination Devices Standards Committee

Influence of Background Spectral Distribution on Perceptions of Discomfort Glare

2020-01-063704/14/2020

The advent of light-emitting diode (LED) technology for automotive lighting allows flexibility of the spectral distribution of forward headlighting systems, while meeting current requirements for “white” illumination. As vehicle headlights have become whiter (with more short-wavelength light output) over the past several decades, their potential impacts on visual discomfort for oncoming and preceding drivers have been hotly debated. It is known that a greater proportion of short-wavelength energy increases discomfort glare, and that increasing the background light level (e.g., through roadway lighting) will decrease perceptions of discomfort. More recently it has been demonstrated that the visual system exhibits enhanced short-wavelength sensitivity for perceptions of scene brightness. As a result, roads illuminated by light sources with higher correlated color temperatures (CCTs) will be judged as appearing to be brighter than those illuminated to the same light level by sources with

Nagare, Rohan M., Bullough, John D.

Innovative Bulb for Compact Headlamps Design

2019-36-006601/13/2020

The Single beam reflector usage with H4 halogen bulb type is adopted in low cost emerging market countries that represent a very important segment for General Motors South America region. Currently, GM engineering tech centers have developed several different solutions for H4 halogen bulb reflector type that have their package, in terms of dimensions, to meet legal requirement and performance. Taking that into consideration, this new H19LL bulb development represents a great opportunity to find out an innovative new design with reduced mass and consequently cost reduction. Besides, it could allow enhancing reflectors portfolio as well as enabling Design Studio to better define customer driven theme for the vehicle appearance.

Cancino Junior, Israel João, Sônego, João Guilherme, de Souza, Raphael Nunes

Maintenance of Design Voltage - Snowmobile Electrical Systems

J277_201909 (Current)09/25/2019

Snowmobile Technical Committee

Halogen Light Source Performance Requirements for Motor Vehicle Forward Lighting

J2560_201909 (Current)09/04/2019

This document establishes performance, material, and design requirements and design guidelines for halogen replaceable light sources used in road illumination devices for forward lighting. Non-halogen filament light sources suitable for forward lighting are specified in SAE J573. The terms “high beam filament” and “low beam filament” used throughout this document refer only to typical use, not to a mandatory, exclusive, or universal function of the filaments. This SAE Recommended Practice is periodically updated to keep pace with experience and technical advances.

Lighting Standard Practices Committee

Design of an Energy-Efficient Critical Angle Lens Reflector

TBMG-3476807/01/2019

The critical angle lens reflector has commercial applications that supersede ordinary mirrored reflectors. The physics of the critical angle lens reflector are based on the optics principle of total internal reflection. Total internal reflection is characterized as follows: (1) as shown in Figure 2, the light rays are reflected off of the reflecting surface whereby the angle of reflection – with respect to the perpendicular to the reflecting surface – is equal to the angle of incidence of the ray, and (2) the reflection of the light ray takes place with no loss of energy upon reflection.

Glare Investigations and Safety Research on Digital Light Technologies

2019-01-084904/02/2019

New human-machine interfaces are the direct result of digitalization. So also in lighting, new constellations have to be taken into account when looking to the possibilities of giving additional informations to the driver. Lighting and furthermore information given by light is a clear preference during nighttime driving. The global interest in standardization of light driven messages from autonomous vehicles to other traffic participants has opened new research needs in order to prepare full view on such new human-machine interface. In Europe, GTB (Group de Travail de Bruxelles) has established a working group dedicated to this topic. In order to provide a complete picture of the effects of digital light, the question of additional glare contribution by digital informations, i.e. extra projected light in form of patterns, symbols or areas was addressed in this research study. This article will show the investigations on wet and dry road glare while driving with digital informations

Hamm, Michael, Huhn, Wolfgang

Porsche reveals eighth-generation of fabled 911

19AUTP01_1501/01/2019

Regularly updating and evolving the Porsche 911's aesthetic signature might seem an impossible task. But more than half a century after its birth, the unveiling of the eighth-generation at the 2018 L.A. Auto Show demonstrated that it is in fact still a totally possible art-with design boss Michael Mauer the chief artist. Designated in-house as the 992 series and slightly larger than the outgoing 991, it is launched in rear-wheel-drive and all-wheel-drive forms-Carrera S and Carrera 4S-and now only in the wide-body width previously used for the Carrera 4 GT3 and GTS, instead of two body widths. Across the nose, the new 911 is 45 mm (1.8 in) wider than the outgoing version, a figure some 911 purists may look at askance, as growth in recent years has already been considerable.

Birch, Stuart

Function Performance Status Classification for EMC Immunity Testing

J1812_201809 (Current)09/13/2018

This SAE Standard provides a general method for defining the acceptable function performance status classification for the functions of automotive electronic devices upon application of the test conditions specified as described in appropriate EMC immunity test standards (for example, SAE J1113 and SAE J551). Testing of devices could be performed either on or off vehicles. Appropriate test signal and methods, Function Performance status, and test signal severity level would have to be specified in the individual cases.

Electromagnetic Compatibility (EMC) Standards

Reflex Reflectors

J594_201806 (Current)

06/19/2018

This SAE Standard provides test procedures, requirements, and guidelines for reflex reflectors.

Signaling and Marking Devices Stds Comm

Motorcycle Headlamp Distribution Comparison

2018-01-103704/03/2018

The forward lighting systems on a motorcycle differ from the forward lighting systems on passenger cars, trucks, and tractor trailer. Many motorcycles, for instance, have only a single headlamp. For motorcycles that have more than one headlamp, the total width between the headlamps is still significantly less than the width of an automobile, an important component in the detection of a vehicle at night, as well as a factor in the efficacy of the beam pattern to help a driver see ahead. Single headlamp configurations are centered on the vehicle, and provide little assistance in marking the outside boundaries like a passenger car or truck headlamps can. Further, because of the dynamics of a motorcycle, the performance of the headlamp will differ around turns or corners, since the motorcycle must lean in order to negotiate a turn. As a result, the beam pattern, and hence visibility, provided by the headlamps on a motorcycle are unique for motorized vehicles. This paper measures the

Neale, William T., Mckelvey, Nathan, Pentecost, David, Koch, Daniel

New Osram IREDs enhance vehicle vision without harming human eyes

18AUTP08_0801/01/2018

As a compliment to cameras, LiDAR and radar, a new family of Infrared LEDs (IREDs) can expand the vision of SAE Level 4 and 5 autonomous vehicles without harming human eyes, claims maker Osram Opto Semiconductors. Infrared night vision cameras, LiDAR, radar, and vehicle headlights will provide autonomous vehicles with an ability to see the surroundings at night, but the technologies have limitations.

Buchholz, Kami

Lighting Identification Code

J759_201712 (Current)12/20/2017

Lighting Standard Practices Committee

Dimensional Specifications for General Service Sealed Lighting Units

J3003_201711 (Current)11/16/2017

Headlamp Aim Adjustment Deflection Analysis

2017-36-007911/07/2017

It is common to see application of simulations to Support product development, being parts, sub-system or complete product, like a passenger vehicle. Another possible application of the simulation is to simulate assembly of parts and sub-systems. This paper captures one example of this application, where the headlamp aim adjustment done during the assembly line, is simulated to provide design changes to avoid issues during the normal production.

Junior, Israel João Cancino, Ramos, Roberto P, Lima, Alex Fabian Fragoso, Sales, Flávio Bréglia

J2087_201708 (Historical)08/17/2017

This SAE Standard provides test procedures, requirements, and guidelines for a daytime running light (DRL) function.

Development of High Efficiency Rectifier with MOSFET in “eSC Alternator”

2017-01-122803/28/2017

Alternator, which supplies electric energy to a battery and electrical loads when it is rotated by engine via belt, is one of key components to improve vehicle fuel efficiency. We have reduced rectification loss from AC to DC with a MOSFET instead of a rectifier diode. It is important to turn on the MOSFET and off during a rectification period, called synchronous control, to avoid a current flow in the reverse direction from the battery. We turn it off so as to remain a certain conduction period through a body diode of the MOSFET before the rectification end. It is controlled by making a feedback process to coincide with an internal target conduction period based on the rotational speed of the alternator. We reduced a voltage surge risk at turn-off by changing the feedback gain depending on the sign of the time difference between the measured period and the target. In addition to reducing the rectification loss, reducing copper loss with low resistance coil winding and iron loss with

Nakanishi, Masaya

High Performance LED Bi-function Module for Universal HID Replacement

2017-01-136103/28/2017

In this study, we are presenting design considerations for the development of a LED (Light-Emitting Diode) bi-function headlight module to replace conventional HID (High-Intensity Discharge) projector modules for retrofitting or first installation purposes. The objective was to develop a projector-type module to outperform current 35 W HID light sources in both low beam and high beam, but with far less installation space. Essential features like multichip LED usage and the optical system design will be described in detail. Special care was taken for the heat management of the high-power LEDs, with optimization of the heat dissipation thermal path via printed circuit board, heatsink and active cooling by extensive Computational Fluid Dynamics simulation work (CFD). The achieved projector lumen output of greater 1300 lm in low beam and 2000 lm in high beam enables a projector module of very compact size (<1,200 cm3) to easily replace HID modules.

Chiu, Huan-Ping, Uhlenberg, Gerald, Wang, Alex, Yen, Jung Hsien

Apparatus and Method for a Light Direction Sensor

TBMG-2635702/01/2017

This invention, developed at NASA's Goddard Space Flight Center, was originally conceived as a high-accuracy, high-sensitivity, bi-axial Sun angle sensor, but has also been proposed for applications involving the general field of precisely measuring the direction in which light travels toward the sensor. It has applications in spacecraft navigation, formation flying in space, space beacons, and automotive collision avoidance.

Case Study: An Accelerated Methodology for Simulating Thermal Stress in Automotive Headlamps

2017-26-032201/10/2017

In any industry, early detection and mitigation of a failure in component is vital for feasible design changes or development iterations or saving money. So it becomes pivotal to capture the failure mode in an accelerated way. This theory poses many challenges in devising the methodology to validate the failure mode. In real world, vehicle head lamp is exposed to all possible kinds of harsh environments such as variable daily ambient, rain, dust and engine compartment temperature …etc. This brings rapid thermal stress onto headlamp resulting into warpage cracks. At vehicle level on particular model, this failure is typically observed after 20,000-25,000 kms in a span of 3-4 months of running. Any corrective action to revalidate the design change or improvement will need similar timelines in regular way to test, which is quite high in product development cycle. In this paper, we emphasize on accelerated test cycle to generate the failure mode within 12-15days on vehicle level test and 4

Kasinathan, Saktheeswaran, Gupta, Sreenivasa, Agha, Husain, Modi, Rajiv

Replaceable Motorcycle Headlamp Bulbs

J1577_201611 (Current)11/15/2016

Motorcycle Lighting Committee-SumanTest-SumanTest-SumanTest

2016 Create the Future Contest: Automotive & Transportation Category Winner

TBMG-2576511/01/2016

Krishan Arora, Mike Baker, Glenn Barber, Peter Brett, Ross Dewhurst, Melvyn Dover, John Gamston, Steven Goodier, Annie Leeson, Vincent Panel, Ben Russell, Alessandra Scotese, Oliver Taylor, Julian Von Thungen-Reichenbach-Evans, Chris Wilks, John Ward-Zinski, and Roy Williamson

Front Fog Lamp

J583_201609 (Historical)09/21/2016

This SAE standard provides test procedures, performance requirements, design guidelines and installation guidelines for front fog lamps.

439A Simulated Air Traffic Control Environments in Flight Simulation Training Devices

ARINC439A-1909/08/2016

This document provides guidance on provision of an SATCE system in Flight Simulation Training Devices (FSTD) for the benefit of flight crew training. This guidance recommends a more mature set of requirements, and provides commentary on system scope, currently available technologies, integration, qualification, and maintenance.

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J2087_201606 (Historical)06/03/2016

This SAE Standard provides test procedures, requirements, and guidelines for a daytime running light (DRL) function.

Deutz-Fahr tractor debuts industry-first Hella LED light package

15MEIP12_1512/01/2015

Deutz-Fahr collaborated with Hella to develop an industry-first LED light package for its line of 7 Series tractors. The Deutz-Fahr 7250 Warrior is equipped with 14 new Hella Module 70 LED Generation IV worklights, which in addition to close- and long-range illumination also offer a special extra-wide illumination, allowing for homogeneous light distribution across the work area. The tractor is the first in the market to incorporate this latest-generation LED light package. For the first time, LED output is on par with that of xenon in this compact design, according to Stefan Maierhofer, the Worklights Program Manager at Hella Fahrzeugteile Austria GmbH, where the company develops and produces its worklights. Equipped with three high-performance multichip LEDs, the Module 70 LED is rated to 2470 lumen and consumes just 30 W of energy.

Gehm, Ryan

Development of Cost Advantageous Designs for Headlight System Using Light Emitting Diodes

2015-32-075011/17/2015

So far, the application of LED headlights to the motorcycle has been limited for only high-priced models, because LED light units and the drivers are expensive. In our development, the cost reduction of light source units was examined by implementing multiple medium intensity LEDs. Distributed mounting scheme was created for LEDs placed on the circuit board to meet the heat dissipation requirement without a heat sink, which is usually installed. By new mounting scheme, the requirement of heat dissipation has been successfully fulfilled by only using the copper foil layer. Moreover, by connecting LEDs in series, the driver circuit configuration was made simple while separate circuits are generally required both for a high-beam and a low-beam. By this configuration, the driver cost was reduced. With this circuitry change, some associated issues arose and measures were devised to cope with them. In addition, the method of driver circuitry, established through applications for conventional

Tsuchiya, Yosuke, Matsuzaki, Teppei, Takeshige, Tetsuo, Oguchi, Tsuyoshi

Lighting Inspection Code

J599_201511 (Current)11/05/2015

This code is intended only for the inspection and maintenance of lighting equipment on motor vehicles that are in use.

J583_201510 (Historical)10/28/2015

Front Fog Lamp

This SAE standard provides test procedures, performance requirements, design guidelines and installation guidelines for front fog lamps.

J1319_201510 (Historical)10/28/2015

Rear Fog Lamp Systems

J2087_201509 (Historical)09/02/2015

This SAE Standard provides test procedures, requirements, and guidelines for a daytime running light (DRL) function.

Harmonized Provisions for Installation of Exterior Lamps and Retro-Reflecting Devices on Road Vehicles Except Motorcycles

J2442_201507 (Current)07/22/2015

International Cooperation Committee

Ultra Low Power LED Fog Lamp with Sharp cut-off optics for Electric Vehicle

2015-01-170204/14/2015

This paper presents a novel technology to achieve very power (4W, 3.2W LED+0.8W driver) 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. Furthermore, by taking advantages of this low power and simpler design, additional features like

Wang, Alex, Yen, Jung Hsien

Comparison Amongst Emerging Markets in Regards to Headlamp Performance and the Challenges Ahead for Global Programs

2015-01-170104/14/2015

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.

Lukacs, Luciano

J2087_201412 (Historical)12/02/2014

This SAE Standard provides test procedures, requirements, and guidelines for a daytime running light (DRL) function.

Fluid Dispensing Solutions for LEDs

TBMG-2099711/01/2014

LED lighting is popular because many governments are banning incandescent bulbs to save energy and carbon dioxide, especially for general lighting. In the automotive industry LEDs are being used because they save energy and costs, especially with the migration to hybrid cars and electric vehicles, and because the flexible LED light shape creates cool designs. These applications have created a need for more precise and accurate fluid dispensing as well as the dispensing of some fluids that require special attention. These dispensing applications must take into account:

Conclusive Aircraft Lighting Approach for Reducing Maintenance and Improving Safety

2014-01-212309/16/2014

Advanced technologies in LED's have the potential to reduce maintenance and improve aircraft safety. Aircrafts need adequate illumination for night time landing. New technology such as high-power LEDs allow for better suited light distributions, more whitish light compatible for mesopic lighting conditions and reduced glare in adverse weather conditions. LEDs and the associated electronics are more susceptible to harsh environmental conditions and this needs to be accounted for in the design of the equipment. Highly conductive metal core PCBs (MCPCB) allow for adequate cooling in a mirror telescopic optical arrangement when coupled with robust active cooling. Closed loop optical feedback of output flux ensures constant performance over the lifetime of the light unit and allows for indication of remaining useful life to the operator to plan maintenance activities. Parylene coating inhibits premature degradation of the LEDs induced by water vapor and corrosive gases.

Hessling, Andre

Tail Lamps (Rear Position Lamps) for Use on Motor Vehicles Less than 2032 mm in Overall Width

J585_201406 (Historical)06/17/2014

This SAE Standard provides test procedures, requirements, and guidelines for tail lamps (rear position lamps) intended for use on vehicles of less than 2032 mm in overall width.