The SAE MOBILUS platform will continue to be accessible and populated with high quality technical content during the coronavirus (COVID-19) pandemic. x

Your Selections

Wipers and washers
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Committees

Events

Magazine

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Simulation of Conductive and Radiated Emission for Off and On-Board Radio Receivers According to CISPR 12 and 25.

Altair Engineering-Aseim Elfrgani, C. J. Reddy
Altair ProductDesign, Inc-Dipen Das
  • Technical Paper
  • 2020-01-1371
To be published on 2020-04-14 by SAE International in United States
Two of the most commonly exercised standards by Electromagnetic compatibility (EMC) automotive engineers are CISPR 12 and CISPR 25. Both are developed and established by EMC regulatory committee named as CISPR (International Special Committee on Radio Interference) which is a part of International Electrotechnical Commission (IEC). While CISPR 12 is imposed as a regulation to ensure uninterrupted communication for off-board radio receivers, CISPR 25 is often applied to ensure the quality of services of on-board receivers. Performing these tests becomes challenging until the vehicle is prototyped which may prolong the production time in case of failure or need for modification. However, conducting these tests in simulation environment can offer more time and cost-efficient way of analyzing the electromagnetic environment of automotive vehicles. In this paper, a computational approach is proposed in order to predict electromagnetic disturbance from on-board electronics/electrical systems using 3D computational electromagnetic (CEM) tool; Altair Feko. The presented study elaborates on radiated and conductive emission simulations performed for both vehicular and component/module level EMI testing according to CISPR 12 and 25. Simulation setup…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Telescopic Rear Wiper Arm with Cam and Roller Mechanism for Increased Wiping Area

Hyundai Motor India Engineering Pvt Ltd.-Venkata Aravind Masimukku, Karthik MSVS
  • Technical Paper
  • 2019-28-2407
Published 2019-11-21 by SAE International in United States
Visibility is a critical factor to avoid the accidents and incidents on road. Every year there are over 5 million car accidents reported in USA. Of these 23% are caused by the hazardous weather and poor visibility. Driving in poor visibility increases the potential for a serious crash. Over the last decade 15% of the accidents on road are due to poor visibility in bad weather conditions. This paper addresses the poor visibility through the rear windshield glass of a car.A vehicle is designed in a way to provide the maximum possible visibility. But due to the vehicle design constraints, the visibility through the rear glass is very less. This visibility reduces drastically in the extreme weather conditions like rain, snow, dust and fog. At present, wiper systems play an essential role in providing better visibility for the driver in bad weather. Even though there are other technological aids like cameras, sensors etc.., they come with a high cost and act as only passive visibility for the driver. These cannot give as much confidence to…
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Measurement of Aerodynamic Performance for Mass-Produced Cars and Light-Duty Trucks

Road Vehicle Aerodynamics Forum Committee
  • Ground Vehicle Standard
  • J2881_201910
  • Current
Published 2019-10-09 by SAE International in United States
This Recommended Practice provides a procedure for measuring and documenting the aerodynamic performance in a full-scale wind tunnel of passenger vehicles, i.e., mass-produced cars and light-duty trucks intended primarily for individual consumers. Testing or numerical modeling of pre-production and/or reduced-scale models is outside the scope of this document. Aerodynamic development procedures, i.e., methods to improve or optimize aerodynamic performance, are also excluded. It is well-known that aerodynamic performance results depend significantly on vehicle content and loading, as well as the wind tunnel itself (type, scale, and simulation qualities of the wind tunnel). Publication of non-standard test results causes unnecessary additional development work and incorrect perception of a vehicle’s anticipated aerodynamic performance by government, academia, and the general public. The intent of this document is to promote uniformity and traceability of published aerodynamic performance data acquired in a wind tunnel, thereby enhancing the public reputation and credibility of the aerodynamics discipline in the total vehicle development process. Measurement of the aerodynamic performance according to this Recommended Practice requires a full-scale wind tunnel test on a production-ready,…
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Passenger Vehicle Windshield Demisting and Defrosting Systems

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J902_201909
  • Current
Published 2019-09-25 by SAE International in United States
This SAE Recommend Practice establishes for passenger cars, light trucks, and multipurpose vehicles with GVW of 4500 kg (10000 pounds) or less, as defined by EPA, and M1 category vehicles as defined by the European Commission:
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

WASHER, KEY - 180 DEG, LOCKING, CRES, UNS S32100

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS9276B
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
This content contains downloadable datasets
This content contains a 2D/3D configurator
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

WASHER, KEY - 90 DEG, LOCKING, CRES, UNS S32100

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS9581B
  • Current
Published 2019-08-15 by SAE International in United States
No Abstract Available.
This content contains downloadable datasets
This content contains a 2D/3D configurator
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Shaft Nut and Keywasher Installation Dimensions for

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS1495B
  • Current
Published 2019-07-29 by SAE International in United States
The purpose of this Standard is to provide installation dimensions for shaft nuts and their companion keywasher. The Standard type typically shown on MS9951 and MS9952, but is also suitable for parts which are dimensionally equivalent.
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Turbulent Pressure Spectra for Separated Flow Conditions

SAE International Journal of Advances and Current Practices in Mobility

Calvin College-Kurtis DeVries
Calvin Engineering-Richard DeJong
  • Journal Article
  • 2019-01-1475
Published 2019-06-05 by SAE International in United States
The magnitude of the turbulent pressure spectrum in fluid flow over an obstruction is usually much larger than in attached flow over a smooth surface. External features on a vehicle, such as windshield wipers, side mirrors and pillars which cause flow separation, are a major source of wind noise. The modeling of the pressure spectrum in separated flow is important for designing quiet vehicles. In this study wind tunnel tests have been performed with different shaped obstructions to measure and correlate the surface pressure spectra with flow parameters such as the pressure coefficient and separation size. The model by Chase for attached turbulent boundary layer pressures is generalized to apply to separated flow conditions.
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

WASHER, KEY - 270 DEG, LOCKING, CRES, UNS S32100

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS9582C
  • Current
Published 2019-04-10 by SAE International in United States
No Abstract Available.
This content contains downloadable datasets
This content contains a 2D/3D configurator
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

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…
Annotation ability available