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It is a question concerning the IRIDIUM TOUGH that is often.
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| The quenching effect of the plug is reduced by using 0.4mm dia. center electrode. |
| The electrode also has a quenching (cooling) effect (effect where the electrode takes away the heat of the spark as soon as firing occurs). Therefore, in a thick electrode the cooling effect is large and sometimes firing does not occur as shown in Figure 4. The characteristics of this firing is called ignitability. To improve ignitability, the contact area between the electrode and the flame kernel needs to be made reduced in size. Accordingly, the electrode was made as fine as possible in the IRIDIUM TOUGH to improve ignitability. |
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