This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Study on Homogeneous Lean Charge Spark Ignition Combustion
Technical Paper
2013-01-2562
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In practical lean burn engines used to date, the use of a stratified air-fuel configuration, with a comparatively rich mixture in the vicinity of the spark plugs, has resulted in the stable combustion of an overall lean mixture. However, because a comparatively rich mixture is burned during the first half of combustion, NOx emissions are not reduced sufficiently.
This research focused on a form of lean burn with homogeneous premixture that would be able to balance low NOx emissions with combustion controllability. It is widely known that homogeneous lean premixed gas has poor flame propagation characteristics. To determine the dominant cause of this, this study investigated the combustion properties of a single-cylinder engine while changing the compression ratio and intake temperature. As a result, the primary cause of combustion fluctuation, the abnormal cycle has a low TDC temperature compared to that of other cycles. It was clear that cycles with an unburned gas temperature in TDC below 950 K had particularly poor heat production during the expansion stroke.
The effect of the temperature of the unburned mixture on the laminar burning velocity using a chemical reaction calculation indicated that the laminar burning velocity increased rapidly when the temperature of the unburned mixture exceeded approximately 1,000K. An investigation of the reason for this phenomenon by conducting sensitivity analyses for the chemical reactions contributing to the laminar burning velocity showed that when the temperature of the unburned mixture reached 1,000K or more, the decomposition of H2O2 produced OH radicals, which promoted combustion. The authors therefore made the modifications to a mass-production engine in order to help ensure that TDC in-cylinder temperature exceeded approximately 1,000K during lean burn. As a result, stable combustion in A/F30, the balance of -low NOx emissions with high efficiency could be achieved.
Recommended Content
Authors
Citation
Hanabusa, H., Kondo, T., Hashimoto, K., Sono, H. et al., "Study on Homogeneous Lean Charge Spark Ignition Combustion," SAE Technical Paper 2013-01-2562, 2013, https://doi.org/10.4271/2013-01-2562.Also In
References
- Germane , G. , Wood , C. , and Hess , C. Lean Combustion in Spark-Ignited Internal Combustion Engines - A Review SAE Technical Paper 831694 1983 10.4271/831694
- Quader , A. What Limits Lean Operation in Spark Ignition Engines-Flame Initiation or Propagation? SAE Technical Paper 760760 1976 10.4271/760760
- Gomez , A. and Reinke , P. Lean Burn: A Review of Incentives, Methods, and Tradeoffs SAE Technical Paper 880291 1988 10.4271/880291
- Yagi , S. , Date , T. , and lnoue , K. NOx Emission and Fuel Economy of the Honda CVCC Engine SAE Technical Paper 741158 1974 10.4271/741158
- Date , T. , Yagi , S. , Ishizuya , A. , and Fujii , I. Research and Development of the Honda CVCC Engine SAE Technical Paper 740605 1974 10.4271/740605
- Kiyota , Y. , Akishino , K. , and Ando , H. Concept of Lean Combustion by Barrel-Stratification SAE Technical Paper 920678 1992 10.4271/920678
- Hardalupas , Y. , Taylor , A. , Whitelaw , J. , Ishii , K. et al. Influence of Injection Timing on In-Cylinder Fuel Distribution in a Honda VTEC-E Engine SAE Technical Paper 950507 1995 10.4271/950507
- Kume , T. , Iwamoto , Y. , Iida , K. , Murakami , M. et al. Combustion Control Technologies for Direct Injection SI Engine SAE Technical Paper 960600 1996 10.4271/960600
- Iwamoto , Y. , Noma , K. , Nakayama , O. , Yamauchi , T. et al. Development of Gasoline Direct Injection Engine SAE Technical Paper 970541 1997 10.4271/970541
- Harada , J. , Tomita , T. , Mizuno , H. , Mashiki , Z. et al. Development of Direct Injection Gasoline Engine SAE Technical Paper 970540 1997 10.4271/970540
- Horie , K. , Kohda , Y. , Ogawa , K. , and Goto , H. Development of a High Fuel Economy and Low Emission Four-Valve Direct Injection Engine With a Center- Injection System SAE Technical Paper 2004-01-2941 2004 10.4271/2004-01-2941
- Furutani , M. , Kawashima , K. , Ohta , Y. A New Concept of Ultralean Premixed Compression-Ignition Engine Transactions of the Japan Society of Mechanical Engineers, Series B 62 595 1240 1246 1996
- Urata , Y. , Awasaka , M. , Takanashi , J. , Kakinuma , T. et al. A Study of Gasoline-fuelled HCCI Engine Equipped with an Electromagnetic Valve Train SAE Technical Paper 2004-01-1898 2004 10.4271/2004-01-1898
- Ishibashi , Y. and Asai , M. Improving the Exhaust Emissions of Two-Stroke Engines by Applying the Activated Radical Combustion SAE Technical Paper 960742 1996 10.4271/960742
- Hashimoto , K. , Koshi , M. , Miyoshi , A. , Murakami , Y. et al. Development of Gasoline Combustion Reaction Model SAE Technical Paper 2013-01-0887 2013 10.4271/2013-01-0887
- Zeldovich , Y. B. Combust. Flame 39 211 214 1980
- Martz , J. B. , Kwak , H. , Im , H.G. , Lavoie , G.A. , Assanis , D.N. Proc. Combus. Inst. 33 3001 3006 2011