Spark plug thermal value is actually an indicator of the ability to receive and dissipate heat, the amount of heat emitted by itself is called the thermal value. The thermal value includes nine numbers from 1 to 9, of which 1 – 3 is the low thermal value, 4 – 6 is the medium thermal value, 7 – 9 is the high thermal value. The original spare parts spark plug thermal value generally has 5, 6, 7 three, can be a lot of heat dissipation is called cold spark plug, that is, high thermal value spark plug, cold spark plug (high thermal value) of the insulator skirt is relatively short, because the heat dissipation path is relatively short, heat dissipation is relatively more, so it is not easy to cause the center electrode temperature rise.
The relatively smaller heat dissipation is called hot type Double Iridium Spark Plug, which is also called low thermal value spark plug. When the temperature in the cylinder is evenly arranged, the longer the skirt is, the larger the heat area is, and the longer the distance of heat conduction is, so the heat dissipation is less, and the temperature of the center electrode rises higher.
Generally speaking low thermal value spark plugs are more suitable for low speed low compression ratio low power engines, while high thermal value spark plugs are suitable for high speed high compression ratio high power engines. The larger the value, the more “cold”, the smaller the value, the smaller the heat dissipation of the Lawn Mower Spark Plug , the more “hot”, the thermal value of the high and low, depending on the cylinder mixture temperature and spark plug design.
Whether the spark plug belongs to the “cold” or “hot” type directly determines its own heat dissipation capacity, that is, the original thermal value of the spark plug directly determines its working environment temperature.
For the spark plug working environment temperature requirements are very high, spark plug heat dissipation can not be too large, nor too small, to ensure that the working temperature of the spark plug, it must match the original thermal value. In general, the upper and lower drop is controlled within 1, if the drop is too large, the light will affect the engine power output, the heavy will lead to spark plug damage, and then damage the engine.
Ningbo Exceed Electrical technology is a private enterprise specialized in spark plug manufacture. We registered trademark of EET.
We manufacture spark plug over hundreds types including resistor type, iridium power type, platinum type, iridium-platinum type, natural gas type and Motorcycle, ATVS,Snowmobiles,Marine in board,Marine outboard,Personal watercraft etc.
Post time: Apr-18-2023