75
Tell me about the required voltage
in the .
The ultra-fine 0.4mm center electrode lowers
the required voltage by several kV.
Recently, there has been a trend to increase the compression ratio to increase output in
engines. This means that the required voltage of spark plugs tends to increase and high
compression is required in highly tuned engines. When this occurs, the required voltage
increases and, in the worst case, sparking ceases while the engine is running.
Minimization of the electrode diameter is an effective way of avoiding this.
In the , the center electrode has a diameter of 0.4mm.
Because required voltage is kept low, this enables the to be used
in high performance engines and for high response driving.
The following graph gives examples of required voltage measurements for
and normal spark plugs.
20
15
10
25
The required voltage is reduced by 3~5kV
for as compared to normal spark plugs.
Normal spark plug
( 2.5)
Good
Required voltage
(kV)
When
started
Idling
Fast
acceleration
Full load
driving
