Heat dissipation of spark plug
When the spark plug is working, the electrode of the spark plug and the ceramic insulator skirt (ceramic small head) are exposed to the combustion chamber, and the constantly changing high temperature gas contact, from 60-120 ° C of the intake to 300-600 ° C of the compression process, to 2000-3000 ° C of the combustion flame, and then to the exhaust 600-1600 ° C, relatively speaking, The low temperature time accounts for less, the high temperature time accounts for more, and the heated area continues to heat up
A — The working temperature of the spark plug terminal is about 100℃
B — The upper part of the spark plug ceramic insulator (the large head part of the ceramic) works at about 100℃
B1 — The temperature at the upper part of the spark plug ceramic insulator near the wrapping edge is about 100℃ to 200℃, and too much is abnormal.
C — the working temperature of the hexagonal part of the shell is about 100 ° C or more than 100 ° C, and the working temperature of the threaded part of the shell is about 100 ° C to 260 ° C, if it exceeds 300 ° C, it is an abnormal working condition.
D — the temperature of the spark plug washer is about 100℃ to 200℃, and if it exceeds 300℃, it is an abnormal condition.
E — The temperature of the spark plug resistor body when working is about 100℃ to 200℃.
F — water jacket coolant, working temperature at about 80℃ to 100℃, more than abnormal conditions.
G — The connection part of the spark plug housing thread and the side electrode, the working temperature is about 100℃ to 200℃, if more than 300℃ for abnormal conditions.
H — The copper core of the spark plug center electrode works at a temperature of about 200℃ to about 500℃.
I — the temperature of the spark plug insulator skirt (ceramic small head) during operation is about 300℃ to 800℃, and if it exceeds 900℃, it is an abnormal working condition.
J — The temperature of the central electrode of the spark plug is about 200℃ to about 700℃, and if it exceeds 900℃, it is an abnormal condition.
K — the temperature of the spark plug side electrode when working is about 200℃ to about 500℃, if more than 900℃ for abnormal conditions.
Note: The above temperature refers to the steady state temperature, not the instantaneous temperature.
Usually, the spark plug shell is made of low carbon steel, and the temperature of a certain part of the shell can be seen through the color of the shell (except the electrode) after the use of the spark plug.
