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3기통 스파크 점화기관의 전자식 연료 분사화에 관한 연구
정동훈(D.H.Jeong),정광민(K.M.Chun) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In rocent years there has been a great demand of developing engines of high performance, low fuel consumption. and low pollutant emission. To optimize engine operation, electronic control system has been developed to control spark timing, fuel injection timing, and injection duration. Consequently many automobile companies have changed fuel supply system of spark-ignition engines from traditional carburetor type to fuel injection type.<br/> In this study the change of engine performance and combustion stability in a 3-cylinder spark ignition engine was studied when carburetor was replaced with eletronic fuel injection system. Electronic fuel injection system and its accessory parts for experiment engine were developed and replaced with carburetor. And air-fuel ratio was controlled at stoichiometric(A/F=14.6).<br/> A 3-cylinder spark ignition engine was used in our experiment, engine performance and cylinder pressure were measured at various engine speed and throttle position. Combustion stability calculated from cylinder pressure and engine perfonnance data were analyzed and compared between carburetor type and electronic fuel injection type.<br/> On part load condition, fuel consumption of eletronic fuel injection type was improved in comparison with carburetor type. And cycle-by-cycle variation in IMEP was reduced by combustion stability increase. On wide open condition, engine torque and power were enhanced and fuel consumption was improved in comparison with carburetor type.<br/>
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