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승용CRDi용 3세대 피에조 인젝터의 내부 유압 모델링 및 수치검증
조인수(Insu Jo),정명철(Myoungchul Jeong),우세종(Saejong Woo),이진욱(Jinwook Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Performance of DI diesel engine with high fuel injection method is directly related to its emission characteristics and fuel consumption. In this study, new numerical model is designed to analyze of 3rd generation piezo-driven injector. And the injection response characteristics of CRDi injectors between conventional 3-way piezo and 3rd generation piezo-driven injector was investigated by using the AMESim simulation code. From this study, we found the bypass-circuit inside 3rd generation piezo injector can cause the injection response with the biggest difference of each injector. Also it was shown that 3rd generation piezo-driven injector had a faster response and had better control capability than 3-way piezo-driven injector due to hydraulic bypass-circuit.
승용 2.0L급 휘발유·LPG·경유 자동차의 주행모드별, 극미세입자 배출 특성 분석
권지원(Jiwon Kwon),정명철(Myungchul Chung),김민식(Minsik Kim),성기수(Gisu Sung),우세종(Saejong Woo),권상일(Sangil Kwon),이진욱(Jinwook Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
The main purpose of this study is to analyze and compare the nano-particle emission characteristics by 3-different fuel(Gasoline, LPG, Diesel) and 2-different driving mode(CVS-75, NEDC) in a 2.0L passenger vehicle. Nano-particle number density emitted by various operating conditions of combustion methods(SI, CI). Test vehicle"s particle emissions was investigated by using the GPMS(Golden Particle Measurement System). Under the driving mode(CVS-75, NEDC) of the 2.0L passenger vehicles with different fuel, the nano-particle number density was measured at the downstream position of DPF(diesel Vehicle), TWC(gasoline, LPG vehicle) system. As a result, this research indicates that all results are much lower than permissible emission regulation (6×10 <SUP>11</SUP>#/km).