The effect of using iridium alloy spark plug[汽车修理知识]

1. Stability of idle speed/saving fuel
Put platinumSpark plugAfter changing to iridium alloy spark plug, idle speedSpeedAs it increases, the range of speed variation decreases. Decreasing the idling speed of the iridium alloy spark plug to that of the platinum spark plug can save 3% of the fuel consumption at idling speed
2. Increasing the EGR rate can reduce NOx emissions
Increase the EGR of the iridium alloy spark plug by 2.5%, and the Nox emission of the iridium alloy spark plug is 25% lower than that of the platinum spark plug.
3. During cold start, HC emissions are reduced
When the engine is cold-started, the air-fuel ratio (A/F) of the iridium alloy spark plug can be set to 0.7, resulting in a 60% reduction in HC displacement
In order to activate the catalyst quickly, the general method is to delay the ignition time during the warm-up process to increase the exhaust temperature. However, delaying ignition will worsen combustion, so ignition cannot be delayed for a long time. However, the excellent ignition performance of the iridium alloy spark plug can achieve long-term delayed ignition.
4. Reduced voltage required / miniaturization of spark plugs
Iridium alloy spark plugs and platinum spark plugs require voltage during rapid acceleration. The smaller the electrode diameter, the stronger the electric field, and the local insulation is easily broken. The iridium alloy spark plug with an electrode diameter of 0.4mm is better than the platinum spark plug (electrode diameter 1.1mm) The required voltage can be reduced by 6kv.

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