Induktive Pulse Generator (coil ignition system)

Function

Why, actually, it was necessary to use four inductive pickups connected in row, has to be explained with the fact that the design should fit into one distributor. It was one of the first non-contact ignition triggers. Additionally, you should consider maximum revs of more than 3000 1/min. Moreover, the switch devices were still in their infancy. They needed a big amplitude and an almost vertical zero passage for the ignition release.

How it works

Four coils switched one after the other are arranged such that in one position of the star, all the coils align exactly with the teeth of the star. The star has as many teeth as there are cylinders in the engine. The permanent magnets behind it build up a magnetic field. If the star turns, an alternating voltage is generated in the coils. From this, the switchgear generates a rectangle signal for the release of the ignition.