Real time HC concentration measutrement in exhaust gas from a spark-ignition engine by using 3.392 mi m absorption method

• Autorzy: Tomita E. , Kawahara N.
• Języki publikacji: EN

Abstrakty

EN

It is a problem that unburned hydrocarbons are exhausted at cold start in spark-ignition engines. In this study, an infrared absorption method was applied to in-situ measurement of hydrocarbon concentration. A He-Ne laser was used as an incident light and reflected three times in the exhaust pipe to make the measurement length long enough to determine the HC. As a result, misfire is detected without fail. It was found that the HC concentration has a relation to indicated mean effective pressure. In late ignition timing, the temperature of the exhaust gas increases and the HC concentration decreases while the cycle-to-cycle fluctuation of mean eff'ective pressure increases. When the fluctuation is large, the HC is larger in the cycle of lower mean effective pressure and the HC is smaller higher one.

Słowa kluczowe

EN

internal combustion engine; spark-ignition engine; laser diagnostics; absorption; concentration; Unburned Hydrocarbons

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2004
• Tom: Vol. 11, No. 3-4
• Strony: 280--287
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Tomita E.

• Okayama University Department of Mechanical Engineering Tsushima-Naka 3-1-1, Okayama 700-8530, Japan Phone: [phone], FAX: [phone]

autor

Kawahara N.

• Okayama University Department of Mechanical Engineering Tsushima-Naka 3-1-1, Okayama 700-8530, Japan Phone: [phone], FAX: [phone]

Bibliografia

• [1] Collings, N., 1988, A New Technique for Measuring HC Concentration in Real Time, in a Running Engine, SAE Paper, No.880517.
• [2] Hall. M.J. and Koenig, M., 1996, A Fiber-Optic to Measure Pre-Combustion In Cylinder Fuel-Air Ratio Fluctuations in Production Engines, The Proceedings of Combustion Institute, Vol.26, pp.2613-2618.
• [3] Mizaikoff, B., Fuss, P. and Hall, M. J., 1998, Fast-Spec: An infrared Spectroscoріс Diagnostic to Measure Time-Resolved Exhaust Hydrocarbon Emissions from S. I. Engines, The Proceedings of Combustion Institute, Vol.27, pp.2093-2100.
• [4] Namazian, M. and Heywood, J.B., 1982, Flow in the Piston-Cylinder-Ring Crevices of a Spark-Ignition Engine: Effect on Hydrocarbon Emissions, Efficiency and Power, SAE Paper, No.820088.
• [5] Nishiyama, A., Kawahara, N. and Tomita, E., 2003, In-Situ Fuel Concentration Measurement near Spark Plug by 3.39µm Infrared Absorption Method (Application to Spark Ignition Engine), SAE Paper, No.2003-01-1109.
• [6] Nishiyama, A., Kawahara, N., Tomita, E., Fujiwara, M., Ishikawa, N., Kamei, K. and Nagashima, K., 2004, In-Situ Fuel Concentration Measurement near Spark Plug by 3.392µm Infrared Absorption Method -Application to a Port Injected Lean-Burn Engine- SAE Paper, No.2004-01-1353.
• [7] Nishiyama, A.. Kawahara, N. and Tomita, E., 2003, In-Situ Fuel Concentration Measurement near Spark Plug by 3.39µm Infrared Absorption Method (Application to Spark Ignition Engine), SAE Paper, No.2003-01-1109.
• [8] Nishiyama, A., Kawahara, N., Tomita, E., Fujiwara, M., Ishikawa, N., Kamei, K. and Nagashima, K., 2004, In-Situ Fuel Concentration Measurement near Spark Plug by 3.392µm Infrared Absorption Method -Application to a Port Injected Lean-Burn Engine- SAE Paper, No.2004-01-1353.
• [9] Rothman, L.S., Rinsland, C.P., Goldman, A., Massie, S.T., Edwards, D.P., Flaud, J.-М., Schroeder, J., McCann, A., Gamache, R.R., Wattson, R.B., Yoshino, K., Chance, K.V., Jucks, K.W., Brown, L.R., Nemtchinov, V, and Varanasi, P., 1998, J. Quant. Spectrosc. Radiat. Transfer, 60, pp.665-710.
• [10] Tomita, E., Kawahara, N., Yoshiyama, S., Kakuho, A., Itoh, T. and Hamamoto, Y. 2002, In situ fuel concentration measurement near spark plug in spark-ignition enginesby 3.39µm infrared laser absoiption method, The Proceedings of Combustion Institute, Vol.29, pp.735-741.
• [11] Tomita, E., Kawahara, N., Shigenaga, M., Nishiyama, A. and Dibble, R.W., 2003, In situ Measurement of Hydrocarbon Fuel Concentration near a Spark Plug in an Engine Cylinder by 3.392µm Infrared Laser Absorption Method -Discussion of Applicability with Homogeneous Methane-Air Mixture-, Measurement Science and Technology, Vol.14, No. 8, pp. 1350-1356.
• [12] Tomita, E., Kawahara, N., Nishiyama, A. and Shigenaga, M., 2003, In situ Measurement of Hydrocarbon Fuel Concentration near a Spark Plug in an Engine Cylinder by 3.392µm Infrared Laser Absorption Method -Application to Actual EngineMeasurement Science and Technology, Vol.14, No. 8, pp.1357-1363.
• [13] Yoshiyama, S., Hamamoto, Y, Tomita, E., and Minami, K., 1996, Measurements of Hydrocarbon Fuel Concentration by Means of Infrared Absorption Technique with 3.39µm He-Ne Laser, JSAE Review, Vol.17, No.4, pp.339-345.