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Title: The thermal effect of internal exhaust gas recirculation on controlled auto ignition
Authors: Chen, Rui
Milovanovic, Nesa
Turner, J.W.G.
Blundell, D.
Keywords: Computer simulation
Cylinder pressure
Engine tests
Exhaust gas recirculation
Heat release analysis
Valve timing
Issue Date: 2003
Publisher: © SAE International
Citation: CHEN, R. ... et al, 2003. The thermal effect of internal exhaust gas recirculation on controlled auto ignition. IN: Proceedings of SAE 2003 World Congress, Detroit, USA, 3rd-6th March.
Series/Report no.: SAE Technical Papers;2003-01-0751
Abstract: Controlled Auto Ignition (CAI) uses compression heat to auto ignite a homogeneous air/fuel mixture. Using internal exhaust gas recirculation (IEGR) as an indirect control method, CAI offers superior fuel economy and pollutant emission reductions. Practically, this can readily be achieved by a method of early exhaust valve closure and late inlet valve opening to trap exhaust gas residuals within the cylinder from one cycle to the next. In order to understand the combustion mechanism, we did a comprehensive investigation on CAI fuelled with isooctane. Test data was gathered from a single cylinder research engine equipped with Lotus’ Research Active Valve Train (AVT) System, and the modelling study was based on detailed chemical kinetics. It was found that CAI can only occur when the thermal energy of the engine charge, which is a mixture of air / fuel and IEGR, reaches a certain level. This thermal energy is inherited from IEGR trapped inside the cylinder from the previous combustion cycle, when the air / fuel fresh charge was supplied at ambient conditions.
Description: This is a conference paper [2003 © SAE International]. It was posted on this site with permission from SAE International. Further use and distribution of this paper requires permission from SAE International.
Version: Published
URI: https://dspace.lboro.ac.uk/2134/8404
Publisher Link: http://www.sae.org/congress/2003/
ISSN: 0148-7191
Appears in Collections:Conference Papers and Contributions (Aeronautical and Automotive Engineering)

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