Title: Knock limit prediction via multi-zone modelling of a primary reference fuel HCCI engine

Authors: Tommy Tzanetakis, Priyanka Singh, Ju-Tsung Chen, Murray J. Thomson, Charles R. Koch

Addresses: Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto ON, M5S 3G8, Canada. ' Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto ON, M5S 3G8, Canada. ' Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto ON, M5S 3G8, Canada. ' Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto ON, M5S 3G8, Canada. ' Department of Mechanical Engineering, University of Alberta, 4-9 Mechanical Engineering Building, Edmonton AB, T6G 2G8, Canada

Abstract: A multi-zone model was used to predict the combustion behaviour of a single cylinder Homogeneous Charge Compression Ignition (HCCI) engine. Blow-by was considered to capture engine performance at the low operating speed of 700 rpm. The model was calibrated and verified by matching predicted and experimental pressure traces at two engine operating points. The calculated CO and Unburned Hydrocarbon (UHC) emissions showed good agreement with experiments at both points. The onset of knock during HCCI was adequately reproduced using the Maximum Pressure Rise Rate (MPRR) criterion and another method based on the pressure equalisation rate within the charge.

Keywords: internal combustion engine; HCCI; homogeneous charge compression ignition; PRFs; primary reference fuels; excess air dilution; EGR; exhaust gas recirculation; multi-zone modelling; blow-by; MPRR; maximum pressure rise rate; UHCs; unburned hydrocarbons; knock boundary prediction; knock limit prediction; vehicle design; pressure equalisation rate.

DOI: 10.1504/IJVD.2010.034870

International Journal of Vehicle Design, 2010 Vol.54 No.1, pp.47 - 72

Published online: 26 Aug 2010 *

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