In this paper, the influence of the injector failure of the GDI engine on the air-fuel ratio inside the combustion chamber can be analyzed through time and shape analysis of the damping process of the ignition coil secondary waveform at 800rpm, 1500rpm, 2000rpm, 3000rpm. In particular, there is a correlation that affects air pollution associated with global warming, such as HC and NOx. To prevent this, periodic injector inspections can improve the fuel efficiency of the vehicle and reduce exhaust pollutants.

• 이근종(Member, Gangneung-Wonju National University) | Geun-Jong Lee Corresponding author
• 김철수(Gangneung-Wonju National University) | Chul-Soo Kim