Tech Tips

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Electrical System

What Does a Spark Plug Do?

The spark plug's function is to supply the high voltage generated in the ignition coil to the combustion chamber, and to ignite the compressed air/fuel mixture by means of the electric sparks between the electrodes. In simple terms, the spark plug ignites the air/fuel mixture, producing thepicture of Platinum plus 4 spark plug combustion that powers the engine.

The spark plug is an important factor in determining optimal performance and reliable functioning of an engine. It must permit reliable cold starting, it must guarantee that there is no misfiring during acceleration, and it must withstand the engine being operated for hours on end at maximum power. These requirements apply throughout the entire service life of the spark plug.

For 100 years, Bosch spark plugs have been designed for optimal performance and reliable functioning, and to withstand extreme operating conditions. Today, the continuously developing spark plug is a key engine system component. It plays a major role in fuel economy, clean, efficient combustion and the reliable operation of engines and catalytic converters.

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