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Thermal indicators of spark plugs
WHAT IS THE HEAT INDEX OF SPARK PLUGS?
A spark plug must release some of the heat generated by the combustible gas. The heat index is the parameter that indicates the amount of heat released.
The heat index is denoted as a number. The lower number is the hot type. The higher number is the cold type.
Hot type spark plugs have a long insulated part, which has a larger surface in contact with hot combustion gas. The ignition head heats up quickly but the heat transfer to the engine is slower.
Cold type spark plugs: short insulated parts, whose smaller surface is in contact with hot gas, can transfer heat to the engine faster.
It is necessary to use spark plugs with a heat index appropriate to the specific engine and its conditions of use. Choosing the wrong heat index will lead to conditions such as:
- When the heat index is too high, the spark plug temperature is still too low, causing sediment to accumulate at the ignition head. The residue will form an electrical leak line, resulting in poor ignition.
- When the heat index is too low, the spark plug temperature rises too high, causing abnormal combustion (pre-ignition). This causes the spark plug electrode to flow, which can cause a piston blockage.
Other
If we categorize vehicles by design and use, we will have 08 popular car models: SEDAN SERIES, HATCHBACK SERIES, SUVs...
Manufacturers have solved this problem by using a preheating system to assist in increasing the required initial temperature in diesel or some other non-sparking engines.
NGK spark plugs guide to use NGK spark plug codes corresponding to popular cars in Vietnam market
At the beginning of 2021, NGK Spark Plugs have updated the instruction sheet for using NGK spark plug codes for popular motorcycles in the Vietnamese market, in order to help customers, partners and car mechanics quickly find the right type. products according to your needs.
The Iridium NGK Laser spark plug features a microscopic central electrode head design with a layer of precious metal code on the contact electrode surface, which increases maximum performance and life, increases ignition, acceleration and is more fuel efficient with conventional spark plugs or platinum spark plugs.
Diesel engines work by compressing the fuel mixture under such great pressure that it ignites automatically. By not using sparks, diesel engines need a large compression ratio to push the temperature up. This ratio sometimes reaches 20:1 while the average gasoline engine only needs 9.5:1.
When used for a long time, it will often experience some conditions such as soot, overheating,... These phenomena make the car difficult to operate and quickly fail the engine.
As we all know, spark plugs are products that need to be replaced every year. What's more, it's a small but important part that's integral to every person's motor vehicle.
What should I do in these situations?