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Impact of Automated Lane Change Assist on Energy Consumption

Embry-Riddle Aeronautical University-Casey Troxler, Patrick Currier, Charles Reinholtz
  • Technical Paper
  • 2020-01-0082
To be published on 2020-04-14 by SAE International in United States
Automated lane change assist combined with adaptive cruise control has the potential to reduce energy consumption and improve safety. This paper models adaptive cruise control combined with automated lane change assist to investigate the energy consumption improvements that such a system may provide compared to conventional adaptive cruise control. Automatically executing a lane change may improve efficiency, for example, when following a vehicle that is slowing to make a turn. Changing lanes while maintaining speed should be more efficient than staying in the same lane as the turning vehicle and reducing speed. The differences in such scenarios are simulated in a virtual environment using a cuboid model with idealized sensors. The ego-vehicle will detect scenarios, evaluate if a lane change is feasible, and possibly perform a lane change to reduce or eliminate required speed changes. The results of the simulations compare the energy content of the resulting drive cycle as an idealized method to measure energy consumption for each cruise control strategy. The simulations consider traffic laws, such as turn signal requirements that may dictate…
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Influence of Background Spectral Distribution on Perceptions of Discomfort Glare

Rensselaer Polytechnic Institute-Rohan M. Nagare, John D. Bullough
  • Technical Paper
  • 2020-01-0637
To be published on 2020-04-14 by SAE International in United States
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 lower CCTs. The present laboratory study was conducted to identify whether the increased scene brightness of a road illuminated with greater short-wavelength light helps to mitigate discomfort glare more than the same scene illuminated to the…
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Full Adaptive Forward Lighting Systems

Road Illumination Devices Standards Committee
  • Ground Vehicle Standard
  • J2838_202003
  • Current
Published 2020-03-12 by SAE International in United States
This SAE standard provides test procedures, performance requirements, design guidelines and installation guidelines for full adaptive forward lighting systems (AFS).
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15 Pole Connector Between Towing Vehicles and Trailers with 12 Volt Nominal Supply

Truck and Bus Electrical Systems Committee
  • Ground Vehicle Standard
  • J2691_202002
  • Current
Published 2020-02-25 by SAE International in United States
This SAE Standard establishes the minimum construction and performance requirements for a 15 pole connector between towing vehicles and trailers, for trucks, trailers, and dollies, for 12 VDC nominal applications in conjunction with SAE J2742. The connector accommodates both power and ISO 11992-1 signal circuits along with dual ground wires to accommodate grounding requirements within the constraints of the SAE J2691 terminal capacity.
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Longitudinal Behavior Analysis of Drivers in Cut-Out Scenes Based on Natural Driving

Tongji University, China-Han Dashuang, Ma Zhixiong, Zhu Xichan, Meng Zhe
  • Technical Paper
  • 2020-01-5032
Published 2020-02-24 by SAE International in United States
Cutting out of the lane in the process of following a car is a natural driving scene that often happens, and it is also a typical scene faced by self-driving cars. In this scenario, the driver may either change lanes after the car in front or continue in the original lane. Based on the natural driving data, the longitudinal driver response behavior of the scene cut out of the car in front is analyzed. For the driver's longitudinal response behavior, firstly, the acceleration behavior domain related to TV1 (Target Vehicle I) was divided by support vector machine method, and then the acceleration time was represented by the transverse body overlap rate of the Vehicle and the Vehicle in front at the initial acceleration time, and the acceleration response process was represented by the average acceleration and the maximum acceleration. The influencing factors were analyzed by single factor analysis of variance and Pearson correlation test. The results show that the factors that significantly affect the acceleration time include cutting average lateral speed, vehicle type in front,…
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Motorcycle Headlamps

Motorcycle Lighting Committee
  • Ground Vehicle Standard
  • J584_202002
  • Current
Published 2020-02-17 by SAE International in United States
This SAE Standard provides test procedures, performance requirements, design guidelines, and installation guidelines for motorcycle headlamps.
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Recommendations for Children’s Snowmobile

Snowmobile Technical Committee
  • Ground Vehicle Standard
  • J1038_202001
  • Current
Published 2020-01-15 by SAE International in United States
This SAE Recommended Practice establishes the test procedures, performance requirements, and criteria necessary to evaluate minimum safety and reliability requirements of a children's snowmobile as identified in 1.2.
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Truck Tractor Power Outlet for Trailer ABS

Truck and Bus Electrical Systems Committee
  • Ground Vehicle Standard
  • J2247_201912
  • Current
Published 2019-12-17 by SAE International in United States
This SAE Recommended Practice identifies the minimum truck tractor electrical power output of the stop lamp and ABS (antilock brake system) circuits measured at the primary SAE J560 tractor trailer interface connector(s).
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Predicting Photometric Degradation of Exterior Aircraft Lights

A-20B Exterior Lighting Committee
  • Aerospace Standard
  • ARP6621
  • Current
Published 2019-12-09 by SAE International in United States
This Aerospace Recommended Practice provides guidance for designers and specifiers of aircraft exterior lighting. Typical causes of light degradation and methods of predicting performance degradation in the aircraft environment are given. Although the document considers only exterior lighting, many of the principles and methods discussed apply to interior or flight deck lighting as well.
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Flashing Warning Lamp for Industrial Equipment

OPTC3, Lighting and Sound Committee
  • Ground Vehicle Standard
  • J96_201912
  • Current
Published 2019-12-09 by SAE International in United States
This SAE Standard covers the general requirements and the test requirements for a flashing warning lamp for industrial wheeled equipment.
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