OEM 22440-VJ202 China Spark Plug Wire

A spark plug wire, also known as an ignition wire, is made up of several key components:

1. Core: The core is typically made of a conductive material, which can be copper, stainless steel, or a carbon-impregnated fiber. This core is responsible for carrying the high voltage from the ignition coil to the spark plug.

2. Insulation: Surrounding the core is a layer of insulation, usually made of materials like silicone, EPDM (ethylene propylene diene monomer), or a combination of both. This insulation is crucial to prevent voltage leakage and ensure that the high voltage reaches the spark plug.

3. Conductive Layer: Some spark plug wires have an additional conductive layer or winding to provide electromagnetic interference (EMI) suppression, reducing the risk of radio interference.

4. Outer Jacket: The outermost layer is the jacket, which is made of durable materials like silicone or a similar rubber compound. This layer protects the wire from heat, chemicals, moisture, and physical abrasion.

5. Boots: At each end of the spark plug wire, there are boots made of high-temperature resistant materials, usually silicone or similar compounds. These boots insulate and protect the connection points at the spark plug and the ignition coil or distributor.

6. Terminals: Inside the boots are metal terminals that connect to the spark plug and the ignition coil/distributor. These terminals ensure a secure and efficient electrical connection.