Abstract

For reduction of CO, NOx and soot emission emitted by diesel diffusion combustion, the authors focused on injection actuator to improve fuel availability inside combustion chamber. In this study, it was investigated the internal dynamic characteristics of two-stage injection with diesel injectors with different driving type for the common rail direct injection by using the AMESim simulation code. The analysis parameter defined such as fuel pressure, injection hole's diameter and driven voltage. As the results, it was shown that the piezo-driven injector had a faster response and had better control capability than the solenoid-driven injector. It was found the piezo-driven injector can be utilized effectively as multiple injector than solenoid-driven injector.

Keywords

• Two-stage injection;
• dynamic characteristics;
• Piezo stack;
• Inverse piezoelectric effect;
• AMESim simulation code

• 2단분사;
• 동특성;
• 피에조 스택;
• 역압전효과;
• AMESim 해석 코드;