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It is general question concerning DENSO SPARK PLUG that is often.
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What is the difference in the life of an iridium plug used under 2-cycle conditions and one used under 4-cycle conditions? |
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In 4-cycle engines, a spark is produced for every 2 revolutions of the crankshaft, resulting in explosion and combustion in the engine.
In 2-cycle engines, a spark is produced for each revolution of the crankshaft, resulting in explosion and engine combustion in the engine.
This simple comparison may lead you to conclude that 2-cycle engines simply have twice the wear; however wear is made up of not only wear from sparking, but also wear from high temperatures (oxidation).
Thus, the amount of wear depends on the driving conditions of the vehicle, how the rotations of the engine are applied (that is, how the shift is used), and whether the resulting combustion temperature is high or low.
2-cycle engines have a higher level of electrode wear. This electrode wear is estimated at approximately 1.5 to 2 times that of 4-cycle engines, and plug life is also shorter with 2-cycle engines. Iridium has a high melting point; however, it will undergo wear from sparking and wear from high temperatures (oxidation). To our knowledge, 2-cycle engines are only found in 2-wheel vehicles, our recommended value in this catalog for lifetime is 3000 to 5000km. (This value is based on a variety of conditions, and, racing use may require even more frequent replacement.) From the above, it is recommended that plugs for 2-cycle engines be replaced about every 3000km. However, the condition of wear depends on operating conditions and the typical engine rpms, so it is also possible to take out the plugs occasionally to confirm the amount of electrode wear and judge when the best time is to replace the plug. |
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