Development of a Control Oriented Model for Controlling HCCI EngineUsing VCR system

سال انتشار: 1392
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,145

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شناسه ملی سند علمی:

ICICE08_009

تاریخ نمایه سازی: 11 خرداد 1393

چکیده مقاله:

A known problem of HCCI engine is its lack of direct control and its requirements for feedback control. Due to theauto‐ignition phenomena of HCCI combustion, fast and appropriate prediction of the SOC (Start of Combustion),BD (Burn duration) and CA50 (Crank Angle in which 50% of cumulative heat release occurs) is required forsuitable control strategy. In this Study, COMs (Control Oriented Models) are modified according to a multi‐zoneThermo Kinetic Model (TKM) in which closed and gas exchange cycles of the engine are modeled. This model iscoupled with a full kinetic model. MKIM (Modified Knock Integral Model) is used for prediction of SOC while anew simple modified model is proposed for BD and CA50 prediction. The MKIM outputs are validated with TKMoutputs and favorable accuracy is observed. A comparison has been made between a new and a known Weibefunction for BD and CA50 and a simple modified model is proposed having both sets of minimum BD and CA50errors. Experimental data of the CFR (Cooperative Fuel Research) engine using VCR (Variable CompressionRatio) by affecting the clearance volume is used. The maximum errors in prediction of BD and CA50 usingproposed modified model are 0.6 and 0.4 crank angle degree, respectively.

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نویسندگان

F Khoshabadi

Faculty of Mechanical Engineering , Sahand University of Technology

R Khoshbakhti Saray

Faculty of Mechanical Engineering , Sahand University of Technology

M Mirzaei

Faculty of Mechanical Engineering , Sahand University of Technology

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