In this paper, we investigate the relationship between control system of Bosch system and that of Delphi system by measuring the high and low voltage waveform, current waveform and fuel injection quantity of D-2 and R- engines. Waveform measurements are used the PICO scope and the CDS tester. The injectors of D-2 and R-engines were tested under no load condition using injector with normal fuel injection quantity, injector with small fuel injection quantity and injector with many fuel injection quantity. The relation between current energy and fuel injection quantity shows that the injector variation rate of D2-engine is much larger than that of R-engine. The injector current energy of the D2-engine was more linear than that of the R-engine, therefore making the system more stable. Although the control system of the D2-engine is a more stable system only in terms of the durability of the internal parts of the injector, the injector of the R-engine has a good response because the current value is large.

ABSTRACT
1. 서 론
2. 이론적 연구
    2.1 제어 회로
    2.2 피에조 인젝터의 이론 전압파형과 전류파형
3. 실험장치의 구성과 방법
    3.1 실험 장비
    3.2 실험 방법
4. 실험결과 및 고찰
5. 결 론
References

• 강성구(Department of Automotive Engineering of Korea Polytechnics National University) | Sung-Gu Kang
• 김철수(Department of Automotive Engineering of Gangneung-Wonju National University) | Chul-Soo Kim Corresponding Author