A compression-sensing ignition system uses which type of ignition?

A compression-sensing ignition system primarily utilizes a waste spark ignition method. In this type of ignition system, both the compression stroke for one cylinder and the exhaust stroke for the adjacent cylinder share the same ignition coil. The system allows for a spark to be generated in both cylinders simultaneously, but only one cylinder requires it at any given moment, specifically during its compression phase.

The waste spark design is particularly efficient, as it simplifies wiring and reduces the number of ignition coils needed, while also enhancing the overall control of the ignition timing. This is crucial in a compression-sensing context, where precise timing is important for optimal combustion efficiency.

Other ignition types, such as distributor systems or coil-on-plug setups, do not typically incorporate this dual-spark methodology which is specifically characteristic of waste spark systems, thus making waste spark the most fitting option for this scenario regarding compression-sensing ignition.