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Numerical Simulation of Mixture Formation and Combustion of Gasoline Engines With Multi-Stage Direct Injection Compression Ignition (DICI)
Technical Paper
2003-01-1091
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Homogeneous Charge Compression Ignition (HCCI) combustion concept has advantages of high thermal efficiency and low emissions. However, how to control HCCI ignition timing is still a challenge in the application. This paper tries to control HCCI ignition timing using gasoline direct injection (DI) into cylinder to form a desired mixture of fuel and air. A homogeneous charge can be realized by advancing injection timing in intake stroke and a stratified charge can be obtained by retarding injection timing in compression stroke. Multi-stage injection strategy is used to control the mixture concentration distribution in the cylinder for HCCI combustion.
A three-dimensional Computational Fluid Dynamics (CFD) code FIRE™ is employed to simulate the effects of single injection timing and multi-stage injection on mixture formation and combustion. Effects of mixture concentration and inlet temperature on HCCI ignition timing are also investigated in this paper. Simulation results show that a homogeneous charge mixture is realized at the optimal injection timing. The mixture concentration distribution in cylinder can be controlled by changing injection timing and applying multi-stage injection. The inlet temperature and the fuel/air equivalence ratio have significant effects on HCCI ignition timing.
Authors
- Yong Sun - State Key Laboratory of Automotive Safety and Energy, Tsinghua University
- Shi-Jin Shuai - State Key Laboratory of Automotive Safety and Energy, Tsinghua University
- Jian-Xin Wang - State Key Laboratory of Automotive Safety and Energy, Tsinghua University
- Yan-Jun Wang - State Key Laboratory of Automotive Safety and Energy, Tsinghua University
Citation
Sun, Y., Shuai, S., Wang, J., and Wang, Y., "Numerical Simulation of Mixture Formation and Combustion of Gasoline Engines With Multi-Stage Direct Injection Compression Ignition (DICI)," SAE Technical Paper 2003-01-1091, 2003, https://doi.org/10.4271/2003-01-1091.Also In
Homogeneous Charge Compression Ignition (Hcci) Combustion 2003
Number: SP-1742; Published: 2003-03-03
Number: SP-1742; Published: 2003-03-03
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