1. Home
  2. Honda R&D Technical Review Vol.21 N...
  3. Measurement of Local Air/Fuel Ratio...

Technical Review e-Book: Summary

Measurement of Local Air/Fuel Ratio and Evaluation of Accuracy of Engine Simulation Using Micro-Cassegrain Sensor

Article of Honda R&D Technical Review Vol.21 No.1


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.


(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) 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) 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) 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) 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) 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) 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) 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) 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) 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) 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(Automobile R&D Center)、Shusuke AKAZAKI(Automobile R&D Center)、Yuji IKEDA(Imagineering, Inc.)

We would like to get your opinion on this research paper. (This is only applicable to registered members.)

The readers of this research paper have also selected these research papers.

Advanced Ignition Control Technology for HCCI Combustion
Article of Honda R&D Technical Review Vol.26 No.2
Development of 2.4 L i-VTEC Gasoline Engine for 2008 Model Year ACCORD
Article of Honda R&D Technical Review Vol.20 No.1
Achievement of Enhanced Fuel Economy via i-VTEC Intake Valve Closure Delay Mechanism
Article of Honda R&D Technical Review Vol.18 No.1