Iridium Power Spark Plug

● Platnium is used for both the center and ground electrodes.
● Milleage drivability and durability are improved by using a finer center electrode with a platinum tip.
● The structure reduce the voltage required for the positive discharges.

Higher Ignitability

Fig. 3 shows the results of evaluating how the miniaturized-portion protrusion direction may influence the ignitability of an engine. The evaluation checked idle speed at equal throttle opening with the ISC (idle speed control) turned off. A higher idle speed represents higher ignitability.
This figure shows the results of evaluating IRIDIUM TT. This figure shows that IRIDIUM TT are superior to the Iridium Spark Plugs in ignitability.