Browse Publications Technical Papers 2000-05-0157
2000-06-12

Flame propagation measurement using ionization probes during fast acceleration 2000-05-0157

Flame propagation was detected with ionization probes located at a spark plug and a head gasket to study the relations of ionization signal to the flame propagation period. Five ionization probes were inserted at a spark plug to detect the initial flame development and eight ionization probes were inserted at a head gasket to detect the overall flame propagation. Experiments were done while the A/F ratio, load and engine speed were varied. In the fast acceleration period, lean peak phenomenon due to the fuel wall wetting occurred for one or two cycles. Ionization signals were used to determine the flame propagation duration during fast acceleration and the lean peak could be avoided by injecting proper amount of fuel.

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