This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Further Exhaust Emission Control for Two-Stroke Engines
Annotation ability available
Sector:
Language:
English
Abstract
Two-stroke engines are being utilized in large numbers as small utility, lawn and garden equipment engines. The following two subjects were examined with regards to exhaust emission control.
The first subject was to compare the theoretical values of a combustion model simulation with the experimentally measured values of the base line emission of two-stroke volume as follows in detail.
- Considering high short-circuiting and residual gas characteristics peculiar to two-stroke engines, comparison analysis between measured exhaust emissions and calculated values by a thermodynamic combustion model simulation.
- Comparison analysis of the trapping efficiency-corrected HC, NOx, CO mass emission rates by the fuel flow and the fuel and air flow method.
- Analysis of influence to engine power and mass emission rates by the cylinder thermal load change with varing air-fuel ratio of the charge mixture.
Thus, in small utility two-stroke engines, it was considered that, using the correction by the trapping efficiency ηtr, the evaluations for the theoretically estimated and experimentally measured values of exhaust emissions could be done sufficiently accurately.
The second subject was to examine the emission conformability to the 1995 and 1999 California Air Resources Board(CARB) exhaust emission regulations (California Regulations for 1995 and Later Utility and Lawn and Garden Equipment Engine, adopted at March 20, 1992, amended, at November 3, 1993 [1]*, was used in our paper abridging as “the 1995 and/or 1999 US-CARB exhaust emission regulations.”) in two-stroke engines with various combinations between various fuels, fuel supply systems and scavenging systems.
For this subject it was determined that the emission control systems based on the lean combustion can be used to meet the 1995 CARB exhaust emission regulations. However, it was also concluded that to meet the 1999 CARB exhaust emission regulations, various emission control systems with various combinations regarding such parameters as fuels, scavenging systems and exhaust systems must be used.
Recommended Content
Authors
Topic
Citation
Sato, K., Nakano, M., Ukawa, H., and Inaga, H., "Further Exhaust Emission Control for Two-Stroke Engines," SAE Technical Paper 941686, 1994, https://doi.org/10.4271/941686.Also In
References
- California Regulations for 1995 and Later Utility and Lawn and Garden Equipment Engines March 20 1992 November 3 1993
- Test Procedure for the Measurement of Exhaust Emissions from Small Utility Engines SAE J1088 February 26 1994 SAE Recommended Practice
- Sato, K. Nakano, M. “Study of a Small Two-Stroke Cycle Engine for Industrial and Farm Use Using Dual Fuels,” Journal of the Japanese Society of Agricultural Machinery 49 1 1987 81
- Sato, K. Kido, K. Nakano, M. “A Method on [Improvement of a Two-Stroke Cycle Gasoline Engine for General Purpose and Agricultural Use (Ist Report),” Journal of the Japanese Society of Agricultural Machinery 41 1 1979 9
- Sato, K. Kido, K. Nakano, M. A Method on [Improvement of a Two-Stroke Cycle Gasoline Engine for General Purpose and Agricultural Use (2nd Report),” Journal of the Japanese Society of Agricultural Machinery 41 2 1979 193
- Sato, K. Kido, K. Nakano, M. “A Method on Improvement of a Two-Stroke Cycle Gasoline Engine for General Purpose and Agricultural Use (3rd Report),” Journal of the Japanese Society of Agricultural Machinery 41 3 1979 353
- Sato, K. Kido, K. Nakano, M. “A Method on Improvement of a Two-Stroke Cycle Gasoline Engine for General Purpose and Agricultural Use (4th Report),” Journal of the Japanese Society of Agricultural Machinery 41 4 1980 535
- Sato, K. “Two-Stroke Cycle Gasoline Engine,”
- Sato, K. Nakano, M. “Separation of Exhaust Gas in Two-Stroke Cycle Gasoline Engines,” Transaction of the Japan Soc. of Mech. Engrs. 52 482 1986 3616
- Sato, K. Nakano, M. “A Method of Separating Short-Circuit Gas from Exhaust Gas in Two-Stroke Cycle Gasoline Engines,” SAE Paper, 871653 1987
- Sato, K. Nakano, M. “Separation of Exhaust Gas in Two-Stroke Cycle Engines (a Follow-UD),” Transaction of the Japan Soc. of Mech. Engrs. 54 497 1988 197
- Sato, K. Nakano, M. Ito, Y. “Separation and Effective Utilization of Exhaust Gas in Two-Stroke Cycle Engines,” Transaction of the Japan Soc. of Mech. Engrs. 56 526 1990 1843
- Sato, K. Ogawa, Y. Nakano, M. “Effective Energy Utilization and Emission Reduction of Exhaust Gas in Two-Stroke Cycle Engines,” Transaction of the Japan-Soc. of Mech. Engrs. 57 534 1991 756
- Sato, K. Ogawa, Y. Nakano, M. “Effective Energy Utilization and Emission Reduction of Exhaust Gas in Two-Stroke Cycle Engines,” International Journal of the Japan Soc. of Mech. Engrs. 34 4 1991 535
- Sato, K. Ukawa, H. Nakano, M. “Effective Energy Utilization and Emission Reduction of the Exhaust Gas in Two-Stroke Cycle Engines,” SAE Paper, 911848 1991
- Sato, K. Nakano, M. Ukawa, H. “Effective Energy Utilization and Emission Reduction of the Exhaust Gas in Two-Stroke Cycle Engines,” SAE Paper, 932394 1993
- Sato, K. Takahashi, S. Nakano, M. Fujita, H. “On the Scavenging Action of a New Type Two- Stroke Cycle Engine with Scavenging and Exhaust Valves on Cylinder Head,” Journal of Soc. of Japan Marine Engine 16 11 1981 935
- Nakano, M. Sato, K. Ukawa, H. “A Two- Stroke Cycle Gasoline Engine with Poppet Valves on the Cylinder Head,” SAE Paper 901664 1990
- Sato, K. Ukawa, H. Nakano, M. “A Two- Stroke Cycle Gasoline Engine with Poppet Valves on the Cylinder Head - Part II,” SAE Paper 920780 1992
- Ukawa, H. Nakano, M. Sato, K. “A Two Stroke Cycle Gasoline Engine with Poppet Valves on the Cylinder Head - Part III,” SAE Paper 930983 1993
- Shimizu, Y. Yamamoto, W. Fujita, M. “Research and Development in a Two-Stroke Cycle Engine,” District Conference of Japan Society of Automotive Engrs.
- Plohberger, D. Miklic, Leo A. Landfahrer, K. “Development of a Fuel InJected TWo Stroke Gasoline Engine,” SAE Paper 880170 1988
- Newhall, H. K. International Comb. Conf Twelth Symp. (International), on Combustion 1969 603
- Nakachi, M. Kawahara, Y. Nakata, Y. “Exhaust Emission Control for Small Utility Engines,” District Conference of Land Engine Manufactures Association
- Sato, K. Nakano, M. Ito, T. Takano, M. Matumoto, T. “Improvement of Combustion for Small Two-Stroke Cycle Engine at Lean Region,” Yamanashi District Conference of Japan Society of Mech. Engrs. 189
- Miyabe, H. Shimomura, R. “A Study on Trapping Efficiency of Two-Stroke Cycle Gasoline Engines,” Transaction of the Japan Soc. of Mech. Engrs. 28 192 1962 1006
- Tomizuka, K. Shibata, H. “On Method of Measuring Charging Efficiency of Two-Stroke Cycle Engine,” Aeronautical Research Institute Report 61 1929 455