커먼레일 디젤 엔진용 피에조 인젝터 제어에 관한 연구 (A Study on the Piezo Injector Control Algorithm for CRDI Diesel Engines)

서지정보

· 발행기관 : 한국정밀공학회
· 수록지 정보 : 한국정밀공학회지 / 26권 / 2호 / 54 ~ 62페이지
· 저자명 : 오병걸, 이강윤, 선우명호, 오승석, 박영섭

초록

The purpose of this study is to develop a piezo injector driver for common-rail direct injection
diesel engines. In this research, we analyzed the electrical and mechanical characteristics of the
piezo actuator through experiments. Current flow and charging voltage of the piezo injector are
controlled by the PWM signal of variable duty ratio in order to realize both fast response and low
peak current. The optimal switching duty ratio was designed by modeling and analyzing of the
piezo driver circuit. In order to avoid resonance and unacceptably long settling time, appropriate
frequency range of the PWM signal was derived based on the driver circuit model. The developed
injector driver was validated by experiments under various fuel rail pressure, injection duration,
and charging voltage.

영어초록

The purpose of this study is to develop a piezo injector driver for common-rail direct injection
diesel engines. In this research, we analyzed the electrical and mechanical characteristics of the
piezo actuator through experiments. Current flow and charging voltage of the piezo injector are
controlled by the PWM signal of variable duty ratio in order to realize both fast response and low
peak current. The optimal switching duty ratio was designed by modeling and analyzing of the
piezo driver circuit. In order to avoid resonance and unacceptably long settling time, appropriate
frequency range of the PWM signal was derived based on the driver circuit model. The developed
injector driver was validated by experiments under various fuel rail pressure, injection duration,
and charging voltage.

참고자료

· 없음