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2. Working principle
High voltage connecting wire is a device connecting ignition coil and spark plug. It consists
of spark plug cap, high voltage wire and ignition coil connector cap.
3. Possible failures
The connection of high voltage wire with spark plug cap and ignition coil connector cap is
loose;
The insulation rubber sleeve of spark plug cap and ignition coil joint cap is aging and
leakage;
The clip spring of spark plug cap and ignition coil connector cap is invalid and the contact
is poor.
Spark plug
1. Outline drawing
2. Working principle
The function of the spark plug is to introduce the high pressure produced by the ignition
coil into the combustion chamber and ignite the mixture by spark between its two
electrodes. The spark plug is mainly composed of center electrode, side electrode,
connecting screw, insulator, sealing washer and shell. In order to better restrain the
interference of ignition to the outside world, damping resistance powder is added between
the connecting screw and the center electrode. According to the length of the insulator skirt,
the spark plug can be divided into different thermal mass. The longer the insulator skirt is,
the lower the heat dissipation degree and the lower the calorific value, otherwise, the higher
the calorific value.
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