Pulstar Spark Plugs

Pulsed Power

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About Pulsed Power

Steady accumulation of energy followed by its rapid release can result in the delivery of a larger amount of instantaneous power over a shorter period of time (although the total energy is the same). Energy is typically stored within electrostatic fields (capacitors) [and others]... By releasing the stored energy over a very short interval (a process that is called energy compression), a huge amount of peak power can be delivered. For example, if one joule of energy is stored within a capacitor and then evenly released over one second, the peak power delivered would only be 1 watt. However, if all of the stored energy were released within one microsecond, the peak power would be one megawatt, a million times greater.

Definition courtesy of Wikipedia: Pulsed Power

To form a spark, a vehicles ignition coil will slowly (relative to the process) inductively increase the voltage delivered to the spark plug until enough voltage is being delivered to allow electricity to bridge the air-fuel mixture between the center electrode and ground strap of the spark plug. This is known as achieving breakdown voltage. Pulstar Spark Plugs use a patented internal capacitor to store this energy prior to achieving breakdown voltage. When a spark is formed the energy stored in the capacitor is released in a quick and powerful pulse. This pulse is equal to 5,000,000 watts and takes approximately three nanoseconds to complete. The intense converts a portion of the gaseous air-fuel mixture into a highly excited plasma that conditions the fuel mixture to ignite immediately and burn efficiently.

Captured by AVL using a process known as Schlieren high-speed photography, this video shows Pulstar’s 5MW pulse followed by the plasma affected fuel mixture burning at an increased rate compared to a conventional spark plug.


Energy delivered by the ignition coil prior to the spark is stored in Pulstar’s capacitor and rapidly released when breakdown
voltage is achieved.