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Vehicle Interior cleanliness tracker

Aptiv Components India Pvt Ltd.-Vijayalakshmi kr, Anitha Loganathan
  • Technical Paper
  • 2019-28-2466
Published 2019-11-21 by SAE International in United States
The future of mobility is being driven towards fully autonomous driving. As a result, people spend majority of the time in vehicles for chores other than driving. The focus of automotive makers shifts towards providing best-in-class passenger comfort. One of the least focused area in passenger comfort is vehicle interior cleanliness which requires periodic human intervention. An intelligent vehicle can outsmart a human by self-caring to maintain the cleanliness elements on floor, seat and roof. This paper addresses subjects like wetness, dirt and stains in the vehicle interior utilizing the capability of Interior sensing platform. An internally mounted camera in the vehicle can capture images of the interior and apply image processing techniques to identify the subjects mentioned above. The wetness on the floor mats can lead to moldy odor, corrosion, failure of the electronic components in the car. Over a period, the vehicle upholstery or seats absorb the dirt and stains and lead to foul smell. HVAC can be used for drying the interior as appropriately detected by the system. A modern system to…
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Wheel and Wheel Trim Weathering Testing for Paint Coatings

Wheel Standards Committee
  • Ground Vehicle Standard
  • J2633_201910
  • Current
Published 2019-10-21 by SAE International in United States
This SAE lab test procedure should be used when performing the following specialized weathering tests for wheels; Florida Exposure, QUV, Xenon and Carbon Weatherometer. In addition to these procedures, some additional post-weathering tests may be specified. Please refer to customer specifications for these requirements.
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Hydraulic Fluid Power Circuit Filtration - Application and Methods

CTTC C1, Hydraulic Systems
  • Ground Vehicle Standard
  • J931_201910
  • Current
Published 2019-10-02 by SAE International in United States
This SAE Information Report is primarily to familiarize the designer of hydraulic powered machinery with the necessity for oil filtration in the hydraulic power circuit, the degree of system cleanliness required, types of filtration and filters available, and their location and maintenance in the hydraulic circuit.
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Snowmobile Passenger Handgrips

Snowmobile Technical Committee
  • Ground Vehicle Standard
  • J1062_201907
  • Current
Published 2019-07-24 by SAE International in United States
This SAE Recommended Practice is intended to give information to engineers and designers in order that access to a passenger handgrip, when used, is easily obtained, and that such handgrips offer maximum safety for a person at least as large as a 95th percentile adult male during snowmobile operation.
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Celebrating the 50th Anniversary of Apollo 11: Exploring Apollo's Impact Beyond 'One Small Step'

  • Magazine Article
  • TBMG-34763
Published 2019-07-01 by Tech Briefs Media Group in United States

On July 20, 1969, humans walked on another world for the first time in history. After a landing that included dodging a lunar crater and boulder field and almost running out of fuel just before touchdown, Neil Armstrong and Buzz Aldrin explored the area around their lunar landing site for 21 hours and 36 minutes while Michael Collins piloted the Command Module around the Moon. They collected soil and rock samples, set up experiments, planted an American flag, and left behind medallions honoring the Apollo 1 crew and a plaque saying, “We came in peace for all mankind.”

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Experimental Investigation of the Droplet Field of a Rotating Vehicle Tyre

FKFS, Forschungsinstitut für Kraftfahrwesen und Fahrzeugmoto-Domenik Schramm, Timo Kuthada
Helmut-Schmidt-Universität Hamburg-Franz Joos
Published 2019-06-18 by SAE International in United States
The consideration of vehicle soiling in the development process becomes ever more important because of the increasing customer demands on current vehicles and the increased use of camera and sensor systems due to autonomous driving. In the process of self-soiling, a soil-water mixture is whirled up by the rotation of the car’s own wheels and deposits on the vehicle surface. The validation of the soiling characteristics in vehicle development usually takes place in an experimental manner, but is increasingly supported by numerical simulations.The droplet field at the tyre has been investigated several times in the past. However, there are no published information regarding the physical background of the droplet formation process and the absolute droplet sizes considering the position at the tyre and the behaviour at different velocities. In the numerical self-soiling simulations, this droplet whirl up process is modelled by a non-rotating wheel, where equally sized droplets are injected tangentially from homogenous emitter lines on the tyre surface into the airfield. The impact of the simplifications of this approach on the final result of…
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Systems and Methods for Correcting Optical Reflectance Measurements

  • Magazine Article
  • TBMG-34625
Published 2019-06-01 by Tech Briefs Media Group in United States

Optical spectroscopy can be used to determine the concentration of chemical species in samples. The amount of light absorbed by a particular chemical species is often linearly related to its concentration through Beer’s Law. For nontransparent materials such as powders, tablets, natural materials (soil), blood, skin, and muscle, optical information can be collected via diffuse reflectance spectroscopy.

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Sensitivity Analysis of Tire-Soil Interaction Using Finite Element Analysis and Smoothed Particle Hydrodynamics Techniques

UOIT-Mirwais Sharifi, Moustafa El-Gindy
University of Ontario Institute of Technology-Zeinab El-Sayegh
Published 2019-04-02 by SAE International in United States
This paper presents the modelling, calibration and sensitivity analysis of LETE sand soil using Visual Environment’s Pam Crash. LETE sand is modelled and converted from Finite Element Analysis mesh (FEA) to Smooth-particle hydrodynamics (SPH). The sand is then calibrated using terramechanics published data by simulating a pressure sinkage test and shear box test using the SPH LETE sand particles. The material properties such as tangent modulus, yield strength and bulk modulus are configured so the simulation’s results match those of theoretical values. Sensitivity analysis of the calibrated LETE sand material is then investigated. The sensitivity analysis includes mesh size, plate geometry, smoothing length, max smoothing length, artificial viscosity and contact thickness. The effect of these parameters on the sand behavior is analyzed. Finally, SPH LETE Sand is used to determine the rolling resistance coefficient of FEA off-road truck tire size 315/80R22.5 for different mesh size sand particles. The results found within this paper will be continued in regard to achieving better understanding of vehicle dynamics for tire-terrain interaction.
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Development of Motor with Heavy Rare Earth-Free Magnet for Two-Motor Hybrid System

SAE International Journal of Advances and Current Practices in Mobility

Honda R&D Co., Ltd.-Yuta Ito, Tadanobu Aoki, Tomokazu Naito, Toru Hiranishi
  • Journal Article
  • 2019-01-0600
Published 2019-04-02 by SAE International in United States
Conventional HEV motors use neodymium magnets with added heavy rare earths, to realize high output and size reduction. However, deposits of heavy rare earths such as Dysprosium (Dy) and Terbium (Tb) are unevenly distributed, so it is important to reduce the amount used, because of supply issue and material cost. In this paper, the application of a heavy rare earth-free magnet is considered on the new motor for a two-motor hybrid system. Compared to conventional neodymium magnets, heavy rare earth free magnets tend to have low coercivity. Also, heavy rare earth-free magnet have low thermal durability, so it is not easy to apply them to motors for a two-motor hybrid system, which requires high output and small size. The motor requires twice as much torque and six times output than one-motor hybrid system. Increase demagnetization resistance and magnet cooling performance is studied by development of the new motor. With the new rotor structure, a magnetic circuit suitable for the magnetic property of heavy rare earth-free magnet was designed, and demagnetization resistance property is raised 24%.…
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Numerical Investigation of Wiper Drawback

Dassault Systemes-Jonathan Jilesen
Exa Corporation-Tom Linden
Published 2019-04-02 by SAE International in United States
Windscreen wipers are an integral component of the windscreen cleaning systems of most vehicles, trains, cars, trucks, boats and some planes. Wipers are used to clear rain, snow, and dirt from the windscreen pushing the water from the wiped surface. Under certain conditions however, water which has been driven to the edge of the windscreen by the wiper can be drawn back into the driver’s field of view by aerodynamic forces introduced by the wiper motion. This is wiper drawback, an undesirable phenomenon as the water which is drawn back on to the windscreen can reduce driver’s vision and makes the wiper less effective.The phenomena of wiper drawback can be tested for in climatic tunnels using sprayer systems to wet the windscreen. However, these tests require a bespoke test property or prototype vehicle, which means that the tests are done fairly late in the development of the vehicle. Furthermore, these results do not provide significant insight into the mechanisms driving the wiper drawback.In order to better understand wiper drawback a numerical simulation is presented of…
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