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Studying the Influence of Direct Injection on PCCI Combustion and Emissions at Engine Idle Condition Using Two Dimensional CFD and Stochastic Reactor Model
Technical Paper
2008-01-0021
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A detailed chemical model was implemented in the KIVA-3V two dimensional CFD code to investigate the effects of the spray cone angle and injection timing on the PCCI combustion process and emissions in an optical research diesel engine. A detailed chemical model for Primary Reference Fuel (PRF) consisting of 157 species and 1552 reactions was used to simulate diesel fuel chemistry. The model validation shows good agreement between the predicted and measured pressure and emissions data in the selected cases with various spray angles and injection timings. If the injection is retarded to -50° ATDC, the spray impingement at the edge of the piston corner with 100° injection angle was shown to enhance the mixing of air and fuel. The minimum fuel loss and more widely distributed fuel vapor contribute to improving combustion efficiency and lowering uHC and CO emissions in the engine idle condition. Finally, the coupling of CFD and multi-zone Stochastic Reactor Model (SRM) was demonstrated to show improvement in CO and uHC emissions prediction.
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Authors
- Li Cao - University of Cambridge
- Haiyun Su - University of Cambridge
- Sebastian Mosbach - University of Cambridge
- Markus Kraft - University of Cambridge
- Amit Bhave - Reaction Engineering Solutions Ltd.
- Sanghoon Kook - Korea Advanced Institute of Science and Technology (KAIST)
- Choongsik Bae - Korea Advanced Institute of Science and Technology (KAIST)
Topic
Citation
Cao, L., Su, H., Mosbach, S., Kraft, M. et al., "Studying the Influence of Direct Injection on PCCI Combustion and Emissions at Engine Idle Condition Using Two Dimensional CFD and Stochastic Reactor Model," SAE Technical Paper 2008-01-0021, 2008, https://doi.org/10.4271/2008-01-0021.Also In
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