Abstract

The fuel consumption rate of gasoline engines can be decreased by reducing cyclic variation and variations in the combustion state between cylinders, but this necessitates high-precision combustion control. Control of the air-fuel ratio (A/F) in the cylinders, in particular the local A/F near the spark plugs, is an important factor in combustion control. A three-dimensional engine simulation model enabling prediction of the local A/F near the spark plugs was therefore constructed. A micro-Cassegrain sensor able to measure the local A/F near the spark plugs in a real engine was used to evaluate the accuracy of the prediction. The results indicated that the local A/F can be predicted within the range of cyclic variation.

References

1. (1) Ikeda, Y., Nishiyama, A., Takeuchi, A., Winklhofer, E.: Optimization of fuel injection by measurement of mixture, 2006 JSAE Annual Congress Proceedings, No. 28-06, p. 15-20 (2006)
2. (2) Tanino, S., Oguri, Y., Suzuki, T.: The Relation between Cyclical Fluctuation and Residual Gas of SI Engine, 2007 JSAE Annual Congress Proceedings, No. 118-07, p. 17-21 (2007)
3. (3) Shiraishi, T., Kimura, H.: Effect of Ignition Specification on Combustion Performance of Spark Ignition Engines, 2005 JSAE Annual Congress Proceedings, No. 107-05, p. 1-4 (2005)
4. (4) Ishikawa, N., Hiraide, A., Takabayashi, T.: Air/Fuel Distribution Simulation in a Port-injected Gasoline Lean-Burn Engine, SAE Paper, No. 2001-01-1230 (2001)
5. (5) Kojima, J., Ikeda, Y., Nakajima, T.: Spatially and Spectrally Resolved Measurement of Chemiluminescence in Laminar Methane/Air Premixed Flames (Correlation between Emission Intensity Ratio of OH*/CH* to the Equivalence Ratio), Transactions of The Japan Society of Mechanical Engineers, B, Vol. 66, No. 647, p. 1871-1878 (2000)
6. (6) Ikeda, Y., Nishiyama, A., Kawahara, N., Tomita, E., Arimoto, S., Takeuchi, A.: In-Spark-Plug Sensor for Analyzing the Initial Flame and Its Structure in an SI Engine, SAE Paper, No. 2005-01-0644 (2005)
7. (7) Nishiyama, A., Jeong, H., Katano, H., Ikeda, Y.: Application of micro Cassegrain system to in-cylinder A/F measurement under cold start condition, 2008 JSAE Annual Congress Proceedings, No. 17-08, p. 11-14(2008)
8. (8) Ikeda, Y., Jeong, H., Nishiyama, A., Baritaud, T.: Cylinder to cylinder A/F fluctuations measurement in a racing engine by chemiluminescence, COMODIA 2008, JSME No. 08-202, p. 535-540 (2008)
9. (9) Jeong, H., Ikeda, Y., Nishiyama, A., Lee, K.: Cycle-resolved flame characteristics measurement with soot in a HSDI diesel engine using micro-Cassegrain system, COMODIA 2008, JSME No.08-202, p. 541-546 (2008)
10. (10) Nishiyama, A., Ikeda, Y., Jeong, H., Katano, H.: Application of a Micro Cassegrain System to A/F Measurements Under Cold Start Conditions, COMODIA 2008, JSME No.08-202, p. 555-561 (2008)
11. (11) Reitz, R.D., Diwakar, R.: Effect of Drop Breakup on Fuel Sprays, SAE Paper, No. 860469 (1986)

Author (organization or company)

• Shunichi KUBOTA（Automobile R&D Center）
• Takafumi KOMORI（Automobile R&D Center）
• Yuji YAMAMOTO（Tochigi R&D Center）
• Shusuke AKAZAKI（Tochigi R&D Center）
• Yuji IKEDA（Imagineering, Inc.）

Publication Information

Article of Honda R&D Technical Review Vol.21 No.1 (205 - 211)

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