초음파센서를 이용한 전자식 연료분사엔진의 흡기유량측정

Air Flow Rate Measurement in Multi Point Injection Engine U sing Ultrasonic Sensors

In this study an air flow meter was developed for MPI engine using ultrasonic sensors. The major characteristcs of the ultrasonic flow meter are high speed response, flow direction recognition and linear output. The air flow rate measurements were conducted at upstream of the throttle and intake manifold. The characteristics of the ultrasonic flow meter are compared with those of the Bosch hot wire flow meter at both steady and unsteady engine conditions.