Effects of intake air temperature on homogenous charge compression ignition combustion and emissions with gasoline and n-heptane

In a port fuel injection engine, Optimized kinetic process (OKP) technology is implemented to realize HCCI combustion with dual-fuel injection. The effects of intake air temperature on HCCI combustion and emissions are investigated. The results show that dual-fuel control prolongs HCCI combustion du...

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Bibliographic Details
Published in:Thermal science 2015, Vol.19 (6), p.1897-1906
Main Authors: Zhang, Jianyong, Li, Zhongzhao, Zhang, Kaiqiang, Lv, Xingcai, Huang, Zhen
Format: Article
Language:English
Subjects:
Air temperature
Combustion stability
Control stability
Dual fuel
Fuel control
Fuel injection
Gasoline
Heptanes
Military helicopters
Temperature
Temperature control
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Summary:In a port fuel injection engine, Optimized kinetic process (OKP) technology is implemented to realize HCCI combustion with dual-fuel injection. The effects of intake air temperature on HCCI combustion and emissions are investigated. The results show that dual-fuel control prolongs HCCI combustion duration and improves combustion stability. Dual-fuel HCCI combustion needs lower intake air temperature than gasoline HCCI combustion, which reduces the requirements on heat management system. As intake air temperature decreases, air charge increases and maximum pressure rising rate decreases. When intake air temperature is about 55?C, HCCI combustion becomes worse and misfire happens. In fixed dual fuel content condition, HC and CO emission decreases as intake air temperature increases. The combination of dual-fuel injection and intake air temperature control can expand operation range of HCCI combustion. nema
ISSN:0354-9836
2334-7163
DOI:10.2298/TSCI140524174Z