The engine backfire leading to the damage to the intake system is observed in the mixer-type LPG engines. The hot spot flowing back into the intake manifold from the engine cylinder during the valve overlap period is known to give rise to the backfire. This backfire is known to be the main cause of the abrupt stop of the vehicle leading to the accidents on the streets. In this study, the cylinder pressure buildup at the later stage of combustion due to the prolonged burning is presumed to be the main cause of the backflow leading to the backfire. This is experimentally observed by creating the engine misfire using the ill-conditioned ignition systems.

Abstract
 1. 서론
 2. 실험장치 및 방법
 3. 실험 결과
  3.1 배전기식 점화장치
  3.2 전자식 점화장치
  3.3 직접 점화장치
  3.4 점화플러그
 4. 결론
 5. 참고문헌

• 전광수 | Kwang-Su Jeon
• 최성은 | Sung-Eun Choi
• 진영욱 | Young-Wook Chin
• 정진은 | Young-Wook Chin