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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
To be published on 2019-11-21 by SAE International in United States
All round visibility is critical for safety of vehicle and road users. A vehicle must be designed in such a way that the driver encounters minimal hindrance for visibility of vehicle surroundings. This is even more essential during poor visibility conditions like during rain, snow, heavy fog etc. At present, wiper systems play an essential role in providing better visibility. There are other technological aides like cameras, sensors etc., but they must be considered as secondary systems, the must not be relied upon. Current wiper systems for front windscreen are very efficient, in terms of wiping area. But the wiper systems for rear windscreen are starkly opposite. The rear wiper arm length is very low, mainly due to low height of rear windscreen. This combined with the motion of wiper arm in an arc, results in low wiping area, leading to poor visibility through rear mirror. This paper addresses this problem with a simple solution - Telescopic Wiper Arm with Cam and Roller Mechanism. This mechanism can be divided into two parts. First is the…
 
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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.
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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.
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Bolt, Machine - Double Hex Extended Washer Head, Close Tolerance Shank, UNS S66286 - 160 ksi

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3530B
  • Current
Published 2019-08-14 by SAE International in United States

Scope is unavailable.

 
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Bolt, Machine - Double Hex Extended Washer Head, Close Tolerance Shank, Drilled Head, UNS S66286 - 160 ksi

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS3531B
  • Current
Published 2019-08-14 by SAE International in United States

Scope is unavailable.

 

Turbulent Pressure Spectra for Separated Flow Conditions

Calvin College-Kurtis DeVries
Calvin Engineering-Richard DeJong
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.
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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.
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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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Development of Brushless Smart Motor for Front Wipers

Mitsuba Corp.-Tomohiko Annaka, Naoki Kojima, Takeshi Ikeda, Masaaki Kimura
Published 2019-04-02 by SAE International in United States
Along with the auto industry’s proactive engagement in autonomous driving and the development of hybrid electric vehicles (HEVs) and electric vehicles (EVs) driven by regulatory compliance for vehicle emissions control and fuel economy, there is a growing need for quieter, lighter, more compact and efficient designs of electronic components for automobiles. For wiper functions, the demand for improving wiping performance at high driving speeds and increasing wiped areas is on the rise. To fulfill all these needs, this project aimed to develop the world’s first brushless controlled wiper system, focusing on the following key elements: 1) power efficiency improvement and noise reduction through an effective sensing design and control methods of field weakening and wide-angle commutation, and 2) lightweight and compact design by reducing the weight and shaft length. The first challenge was to minimize power consumption in consideration of constant load changes during wiper operation as well as reducing the motor noise. With the correction method applied to the sensing design and the field weakening control and the wide-angle commutation control, the final design…
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A Development of the Prediction and Optimization Tool for Wiper High Speed Performance

Hyundai Motor Company-Hunjae Kim
Published 2019-03-25 by SAE International in United States
In this paper, we focused on the robust wiping performance of high speed driven condition as an important situation for vehicle safety. Frist, we selected appropriate wiper performance parameter to accurately predict its ability not only systematic point but also vehicle point. Second, we obtained parameter sensitivity of wiper high-speed performance using DFSS technique. Third, we developed prediction and optimization tool using commercial program; Excel and Visual Basic. Finally, we improved our tool to compare vehicle test and then modified prediction coefficient for the accuracy of tool. Thus, we proposed a systematic tool to predict wiping performance in high speed vehicle, and successfully obtained efficiency when we developed the new project’s wiper performance.
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