고압가스 내압용기 장착 대형상용차의 측면충돌 시 연료장치 안전성 평가 방법에 관한 연구

다국어 초록 (Multilingual Abstract)

Heavy duty vehicles equipped with high pressure vessels are expected to expand the supply of hydrogen commercial vehicles like large bus and trucks according to the governments hydrogen economy roadmap (2019 yr). In particular, the hydrogen fuel pressure vessels have high pressure about 700 bar unlike other fuel pressure vessels, so there are possible to high severe accidents due to damage and leakage of the fuel system when happened side collisions and rollover accidents from actual roads. high. Currently, there is no actual vehicle crash evaluation(Full scale crash test) for fuel system integrity of heavy duty vehicles of post-crash through worldwide except Korea. The regulations applied the alternative acceleration test (Sled) that evaluates only the severity according to the inertial load in the case of a collision. Korea does not also evlauate actual crash test about side impacts happened most frequent accident cases. The purpose of this study is to confirm the necessity of actual crash evaluation and to verify fuel system safety through those tests. In addition, heavy duty vehicles not only need the actual vehicle crash evaluation but also the module systems of Compressed hydrogen storage systems because of the small-volume production of multiple types, relatively high test vehicle cost and various fuel install locations unlike passenger cars. Through this study, find the risk mechanisms such as fuel system leakage/damage according to side collisions, so the following results were derived. First, find the evaluation necessity according to the direct impact load as well as the inertia load from actual crash tests. Second, the intrusion of the vehicle stucture around the fuel systems is more effects than the impact acceleration in terms of actual crash test. Third, the dangerous situations of the fuel system like fuel leakage does not happen the direct contact with vehicle structure or ground but the fuel system breakage of the valves and connection pipes of the fuel system. This study results are expected to utilize the basic data for developing new side crash evaluation methods for heavy duty vehicle vehicles like buses and trucks equipped with high pressure vessels.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 고압가스용기 장착 대형상용차 측면충돌평가 방법
• 3. 시험결과 및 분석
• 4. 결론
• References