• Title, Summary, Keyword: Pedestrian Safety Airbag

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Performance Analysis of an Active System for Pedestrian Protection Using Impact Analysis (충돌 해석을 이용한 능동형 보행자 보호 시스템의 성능 분석)

  • Park, Jong-Sun;Jeong, Seong-Boem;Yun, Yong-Won;Park, Gyung-Jin
    • Transactions of the Korean Society of Automotive Engineers
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    • v.21 no.6
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    • pp.100-107
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    • 2013
  • Although automotive safety technologies have been developed steadily, the efforts for pedestrian protection still seems to be insufficient. In a car-pedestrian accident, the structures such as the engine under a hood, the lower part of a windshield and the A-pillar are the major causes of fatal pedestrian injuries. Recently, there have been several studies on the active safety system to reduce the pedestrian injuries. The safety system consists of an active hood lift system and a pedestrian airbag. In this research, the safety performance of the active hood lift system and the pedestrian airbag is investigated by using the finite element method. The finite element model of the system is set up based on the head impact test, and the impact analyses are performed. The necessity and the usefulness of the safety system are verified.

Effectiveness of Active Hood and Pedestrian Protection Airbag Based on Real Vehicle Impact Test (실차평가시험을 기반으로 한 액티브 후드 및 보행자 보호 에어백 효과)

  • Yun, Yong-Won;Park, Gyung-Jin;Kim, Tai-Kyung
    • Transactions of the Korean Society of Automotive Engineers
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    • v.22 no.1
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    • pp.36-45
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    • 2014
  • Pedestrian to vehicle traffic accidents show a very high mortality rate compared to the frequency of occurrence. In order to improve the pedestrian protection performance of the vehicle, the korean government added a "pedestrian safety" entry from the year 2007. The performance for pedestrian protection of current vehicles gradually improved compared to the past, but it is still insufficient. It was found that the pedestrian protection performance was very weak, such as the top of the bonnet, the A-pillar and under the front windshield. A application of an active hood and pedestrian protection airbags can be countermeasures for these weak points of pedestrian safety. The active hood and pedestrian protection airbags are designed and manufactured to apply to the top of the hood and to the bottom of the windshield. The manufactured system is equipped in a test vehicle and evaluated based on the Korea New Car Assessment Program(KNCAP) test procedures for the performance of pedestrian safety. As a result, the outstanding effect of pedestrian protection has been achieved by the active hood and the pedestrian protection airbag. The rates of pedestrian injury are reduced by 82.2% and 95.4%, respectively.

An Optimal Design of a Pedestrian Safety System Using a Design Scenario (설계방법론을 이용한 보행자 보호 시스템의 최적설계)

  • Yun, Yong Won;Park, Gyung Jin
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.38 no.9
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    • pp.1019-1027
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    • 2014
  • Vehicle-into-pedestrian traffic accidents show a very high mortality rate compared to their frequency of occurrence. Throughout the world, governments and insurance companies tend to establish and implement new safety standards for pedestrian protection. In order to improve the performance of pedestrian protection, the Korean government has evaluated the pedestrian safety of vehicles under the Korea New Car Assessment Program (K-NCAP) since 2007. The pedestrian protection performance has improved gradually, but it remains insufficient. A pedestrian protection system consisting of a hood lift system and a pedestrian airbag can be a solution to pedestrian safety. A pedestrian airbag design procedure based on a newly defined design scenario is introduced to reduce the head injury criterion of pedestrians. The proposed design scenario is discussed from a practical viewpoint and applied to manufacture pedestrian protection systems.

Assessment of Vehicle Safety Standard Requirements for New Micro-mobility Vehicle (초소형자동차의 자동차안전기준에 대한 효과분석)

  • Jang, Jeong Ah;Sim, Sojung
    • Transactions of the Korean Society of Automotive Engineers
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    • v.25 no.2
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    • pp.190-200
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    • 2017
  • In general, an assessment of the benefits and costs with regard to vehicle safety standards are validated before regulations are implemented. This paper performs this validation for the mandatory automobile safety devices requirement for new micro-mobility. The reviewed car safety standards involved the installation of seat belts, airbags, ABS, crash speed standards, and pedestrian warning system. The benefit was estimated as the cost of accident reduction due to the installation of vehicle safety standards. As a result, the safety belt showed a B / C of 4.0 or higher, and it was found that the seat belt should be installed from 2017. After the seatbelt regulation in 2017, the results of the scenarios with the airbag, ABS, crash speed of 40 km/h, and the pedestrian warning system showed B / C of 1.0 or more according to the year of regulation. This study can be useful as a tool in the decision-making process with regard to the timing and type of vehicle safety standards requirement of micro-mobility in the future.