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Download fileThe thermal effect of internal exhaust gas recirculation on controlled auto ignition
conference contribution
posted on 2011-05-25, 08:54 authored by Rui Chen, Nesa Milovanovic, J.W.G. Turner, D. BlundellControlled 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.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
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.Publisher
© SAE InternationalVersion
- VoR (Version of Record)
Publication date
2003Notes
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.ISSN
0148-7191Publisher version
Book series
SAE Technical Papers;2003-01-0751Language
- en