| 摘要 |
PURPOSE:To ensure the ignition of an engine even if either one of electrodes cannot spark, by arranging a plurality of ignition electrodes in the peripheral section of a space through which atmoized fuel stream from a fuel injection device passes, and by arranging spark gaps in the electrodes in parallel with each other. CONSTITUTION:An atomized fuel stream injected from a jet port in a fuel injection valve reaches a through-hole, and is evaporated successively from liquid drops. The thus evaporated fuel is mixed with air introduced from the outer peripheral edge of the atomized fuel stream to form a burnable mixture while the evaporated fuel passes through spark gaps 23 and moves toward a vortex chamber. An ignition voltage applied to a high spark voltage supply section 12 allows one of spark gaps 23 which is easiest to spark, to generate a spark while the other spark gaps 23 do not spark since the spark gaps 23 establish parallel gaps. Accordingly, even if the position of the atomized fuel stream is shifted, natural spark is effected at a spark gap 23 which has a maximum possibility to make in contact with this atomized fuel, and the spark initiation voltage may be made lower and the ignition may be stabilized. |
