MPI 엔진용 공기 보조 인젝터의 분무 미립화 및 및 연소 특성에 관한 연구

The spray characteristics of air-assisted fuel injection and its effects on the lean combustion was investigated in this study. The atomization characteristics of a Bosch fuel injector inserted into the air-assist adapter is measured with PMAS. Droplet size decreased with air supplied and fine spray with below 6O㎛ of SMD is acquired at the assistant air pressure over O.5bar. The lean combustion performance of a 1.8L DOHC engine equipped with air-assist adapters is tested on the dynamometer. When the assistant air pressure is increased. lean limit was extended, and fuel consumption and emissions were decreased.