The intake system of a 2-Valve TJ376QE gasoline engine was modified so that its intake swirl and tumble motions were considerably intensified. The stronger air motions are helpful to organize air and fuel mixture strength distribution. The previous port electronic fuel injection system was modified and the technique of TEFI (Twice Electronic Fuel Injection per cycle) is employed. Through regulations of the two injection timings and proportions, an adequate air and fuel mixture stratification–quasi-homogenous mixture was produced and the lean burn can be realized in a product 2-valve S.I. engine. The experimental results show that the scope of bsfc reduction can be >10 % at quite wide load range by ether 1 injection or by 2 injections. Comparing to the conventional single injection, a leaner mixture can be used by TEFI and an even more reduced fuel consumption of 5% was reached by 2 injections. The optimized values of A/F ratio can be higher by 2–3 units of A/F than that of the single injection method. The TEFI can reduce NOx emission by 35–50% than that of single injection at engine load (bmep) range of 0.20–0.75 (MPa).
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ASME 2005 Internal Combustion Engine Division Fall Technical Conference
September 11–14, 2005
Ottawa, Ontario, Canada
Conference Sponsors:
- Internal Combustion Engine Division
ISBN:
0-7918-4736-5
PROCEEDINGS PAPER
An Investigation of Lean Burn in a 2-Valve TJ376QE SI Engine
Shu-Liang Liu,
Shu-Liang Liu
Tianjin University, Tianjin, China
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Tian-You Wang,
Tian-You Wang
Tianjin University, Tianjin, China
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Hong-Jun Su,
Hong-Jun Su
Tianjin University, Tianjin, China
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Jian-Wen Li,
Jian-Wen Li
Tianjin University, Tianjin, China
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Mao-Lin Fu
Mao-Lin Fu
Tianjin University, Tianjin, China
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Shu-Liang Liu
Tianjin University, Tianjin, China
Tian-You Wang
Tianjin University, Tianjin, China
Hong-Jun Su
Tianjin University, Tianjin, China
Xing Li
Tianjin University, Tianjin, China
Jian-Wen Li
Tianjin University, Tianjin, China
Mao-Lin Fu
Tianjin University, Tianjin, China
Paper No:
ICEF2005-1250, pp. 295-302; 8 pages
Published Online:
November 11, 2008
Citation
Liu, S, Wang, T, Su, H, Li, X, Li, J, & Fu, M. "An Investigation of Lean Burn in a 2-Valve TJ376QE SI Engine." Proceedings of the ASME 2005 Internal Combustion Engine Division Fall Technical Conference. ASME 2005 Internal Combustion Engine Division Fall Technical Conference (ICEF2005). Ottawa, Ontario, Canada. September 11–14, 2005. pp. 295-302. ASME. https://doi.org/10.1115/ICEF2005-1250
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