Browse Publications Technical Papers 2002-01-0741
2002-03-04

Investigation into Air-Fuel Ratio Measurement of a High Performance Two-Stroke Engine by an Optical Method 2002-01-0741

Close control of air-fuel ratio is vital to attaining optimum performance from internal combustion engines. To ensure that air-fuel ratio is maintained at the correct value, an accurate measurement of the real-time air-fuel ratio is required.
This paper investigates the use of an optical method to measure air-fuel ratio of a high performance two-stroke engine.
The technique measures the light emission from the combustion process at two wavelengths, corresponding to the CH and C2 radicals. A relationship between characteristics of this light emission and air-fuel ratio has been developed over a range of engine operating conditions. Other factors that affect this relationship have also been quantified.

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