Performance Simulation of HCCI Engine Equipped with Direct Injection System

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Mozaffari, Behnam | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40563 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Mozafari, Ali Asghar
Abstract:
HCCI engines have lower NOX and PM emissions and higher thermal efficiency compared to spark ignition engines. But these engines have some deficiencies which up to now have prevented their widespread employment. These engines have not been very successful at high loads and speeds and in these conditions normally produce high pollution and noise. In order to solve this problem the present research proposes to equip the HCCI engines with fuel injection system so that at low loads and speeds operate at HCCI engine mode and at loads and speeds higher than pre-set limits, use the fuel injection system in order to operate at a combined HCCI and compression ignition engine mode and provide a successful performance. Therefore based on this proposal, the combined system enjoys the advantages of HCCI engines (at low loads and speeds) and benefits the advantages of compression ignition engine at high loads and speeds. In this research the performance of HCCI engine and dual engine are compared and the quantity of the fuel injection at high loads and speeds are studied. Performance of these engines, with inclusion of heat transfer from in-cylinder contents to surrounding surfaces is predicted.
Keywords:
Homogeneous Charge Compression Ignition (HCCI) ; Combustion ; Diesel Engines