The spark plug of Cadillac atsl is made of iridium and platinum. The spark plug made of this material has good heat resistance, electrical conductivity, corrosion resistance and long service life. The function of the spark plug is to introduce the pulse high voltage electricity generated by the ignition coil into the combustion chamber, and use the electric spark generated by the electrode to ignite the mixture to complete the combustion.
BBA cars are more "noble", the engine ignition system is more complicated, and the spark plug consumption will be faster, just as the super-running technology is more advanced, adding 98 or even10/gasoline.
Different spark plug materials will lead to different service life. First of all, some Mercedes-Benz, BMW and Audi models suggest replacing spark plugs for 20,000 kilometers, because the spark plugs used in the original factory are of poor material. Didn't expect that, did you
For example: mercedes benz c class (configuration | inquiry) and E class, the original factory uses iridium spark plugs, while the original spark plugs of most Honda models are iridium platinum.
The "How often do we change the spark plug" in the video before said: The life of iridium spark plug is about 80,000 km, and iridium platinum spark plug is 65,438+100,000 km, which is better.
Spark plugs in different cars work in different ways. The life of iridium spark plug is obviously 80 thousand km. Why are some BBA cars recommended to be replaced after 20,000 kilometers? Four times the difference, right?
There is a reason why the spark plug wears faster in turbocharged engines. BBA is a turbocharged engine, and the spark plug wears faster than Honda's naturally aspirated engine.
Li Baiqi and others published a paper entitled "Research on Spark Plug Matching Design of Small Turbocharged Gasoline Engine" in Proceedings of APC Joint Academic Annual Meeting 20 13.
It says: With the increase of intake pressure, the in-cylinder thermal load and mechanical load of turbocharged engine are obviously heavier than that of naturally aspirated engine with the same displacement.
For the spark plug, it needs to bear greater thermal shock, higher voltage, stronger mechanical shock and stronger corrosiveness, which will lead to a rapid decline in service life.
In terms of ignition voltage, the ignition voltage of B48TU engine of BMW has increased to 42kV, and that of L 15B2 engine of Honda is only 20 to 30kV.
Higher voltage means more losses. For example, a snack 15 yuan is enough, right? If you have to eat KFC, of course, money will be spent faster.
The engine is ignited many times at a time, and the spark plug wears off quickly. Even for turbocharged engines, BBA will cause spark plug loss faster than Honda's turbine because the ignition system is more complicated.
For example: Mercedes-Benz M27.
4、M27
0, M276 and other engines adopt a technology called "Fast Multiple Discharge Ignition" (MSI).
This technology is very simple: in a working cycle, the spark plug can be "snapped" up to five times in one fuel injection, in order to make the combustion more complete.
BMW B48 and other engines also use a similar continuous ignition system, 1 fuel injection, which can ignite 3 to 8 times.
Because of this thing, the multiplied ignition frequency will cause BBA's engine to be about 20 thousand kilometers, so forget it with a new one.
(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)