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An Alternate Methodology to Measure the A-Pillar Obstruction in Passenger Cars
Technical Paper
2013-26-0030
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
With ever increasing demand for vehicle safety and fuel efficiency, Body in White (BIW) designers are striving for vehicle's body mass optimization leading to the development of lean designs. Nevertheless, considerations like ergonomics also play a significant role while deciding the vehicle structure.
As an example, A-pillar (front pillar) plays a major role in vehicle's passive safety. Increase in its cross section size, beyond a particular grade and gauge optimization is eminent to meet target requirements of rigidity and crash. However, the increased obstruction because of the wider section would not only lead to poor visibility and a claustrophobic feeling to the driver but also lead to a lesser response time for him or her to prevent a collision.
Obstruction from A-pillar can be a subjective feeling of driver but it should also be quantified and measured to optimize the A-pillar structure. Numerous methodologies are being adopted globally to measure the A-pillar obstruction. One of the widely accepted methodologies has been provided in “AIS-021 Field of Vision of Motor Vehicle Drivers” for M1 category of vehicles [1]. However, vehicles with similar obstruction angle may have a very different driver's perception regarding the actual obstruction in his or her field of view.
In order to address this problem, a new methodology has been studied that measure A-pillar blind spot in terms of A-pillar obstruction ratio, which is the obstructed area within an effective visibility boundary. The paper discusses this methodology in detail through a measurement of the obstruction ratio across various passenger cars and comparing with the already used methodology as per AIS-021.
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Authors
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Citation
Ramu, B., Khurana, R., and Sharma, P., "An Alternate Methodology to Measure the A-Pillar Obstruction in Passenger Cars," SAE Technical Paper 2013-26-0030, 2013, https://doi.org/10.4271/2013-26-0030.Also In
References
- AIS-021 Field of Vision of Motor Vehicle Drivers for M1 Category The Automotive Research Association of India P. B. No. 832, Pune 2004
- Allen , M. J. , Abrams , B. S. , Ginsburg , A. P. and Weintraub , L. Forensic Aspects of Vision and Highway Safety Lawyers & Judges Publishing Co, Inc. 1996
- Haslegrave , C. M. , Peacock , B. and Kaewowski , W Visual Aspects in Vehicle Design. Automotive Ergonomics Taylor and Francis 79 98 1993
- Council Directive 77/649/EEC Council Directive on the Approximation of the Laws of the Member States Relating to the Field of Vision of Motor Vehicle Drivers Official Journal of the European Communities, No. L 267/1 1977
- ECE R125 Uniform Provisions Concerning the Approval of Motor Vehicles with regard to the Forward Field of Vision of the Motor Vehicle Driver Agreement concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipment and Parts Geneva 1958