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The Thermal Effect of Internal Exhaust Gas Recirculation on Controlled Auto Ignition
Technical Paper
2003-01-0751
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
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 iso-octane. 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.
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Authors
- Rui Chen - Department of Aeronautical & Automotive Engineering, Loughborough University
- Nebojsa Milovanovic - Department of Aeronautical & Automotive Engineering, Loughborough University
- Jamie Turner - Powertrain Research Department, Lotus Engineering
- Dave Blundell - Powertrain Research Department, Lotus Engineering
Topic
Citation
Chen, R., Milovanovic, N., Turner, J., and Blundell, D., "The Thermal Effect of Internal Exhaust Gas Recirculation on Controlled Auto Ignition," SAE Technical Paper 2003-01-0751, 2003, https://doi.org/10.4271/2003-01-0751.Also In
Homogeneous Charge Compression Ignition (Hcci) Combustion 2003
Number: SP-1742; Published: 2003-03-03
Number: SP-1742; Published: 2003-03-03
References
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