Modern automotive gasoline engines are using ignitions systems that integrate the sparkplug and ignition coil into the engine block in order to have the high voltage system as small as possible and and close as possible to the cylider to create an optimal fuel efficiency. To protect this system for environmental conditions and contamination, the sparkplug and ignition coil can be covered by a silicone rubber plugboot.
Shin-Etsu Silicone rubber for plugboots has very excellent characteristics to create a durable and stable cover as it is sustainable to high temperatures and is resistant to engine oil, water, moisture and dirt. Furthermore, it has good electrical insulation properties and prevents the corona effect.
The design of the plugboot is up to custom requirements.
Plugboot properties
| Parameter | Unit | Value |
|---|---|---|
| Hardness | Shore A | 58~60 |
| Volume resistivity | Ω•cm | 3•10^15 |
| Breakdown voltage | kV/mm | 30 |
| Elongation | % | > 400 |
| Tensile strength | MPa | 9.4 |
