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승용디젤엔진의 closed-loop 연소압기반 실시간 연소제어 기술 개발
한경찬(Kyoungchan Han),유준(Jun Yu),박승일(Seungil Park),유성은(Seungeun Yu),민경덕(Kyoungdoug Min),최회명(Hoimyung Choi) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
As vehicle emission regulations are becoming more severe, various engine subsystems and control technologies are being introduced to meet the stringent demands of these regulations. However, because the diesel engine combustion is initiated by auto-ignition, control of the combustion is considerably more difficult. Moreover, there must be cylinder-to-cylinder deviations in diesel combustion engines due to tolerances of the engine hardware and variations in fuel quality. In this study, a ‘closed-loop combustion control’ method was used to accomplish real time combustion control. To achieve the combustion control, MFB 50 (burned mass fraction 50%) was initially determined by analyzing in-cylinder pressure in the diesel engine. Main injection timing was then corrected to sustain the target MFB50 using a in-house control logic. The control logic was demonstrated at steady and transient conditions including NEDC mode. Results from the control method proved possibilities to minimize variation effects of diesel fuel quality and improve fuel efficiency and emissions.