Patent ID: 6545415
Filing Date: 2003-04-08
Classification: F02P

Abstract:
An ignition system with a high efficiency ignition coil usable with any type of high voltage ignition system from the class of capacitive and inductive and hybrids of these for producing an ignition spark in a spark gap, with a primary winding of turns (Np) and secondary winding of turn (Ns), and turns ratio N (N=Ns/Np), wherein the secondary winding is wound on a segmented type bobbin with multiple bays separated by radial flanges, the coil including an end-effect inductor of inductance (Lc) located between the high voltage end of the coil winding and the spark gap, the inductor having core material which is electrically lossy with resistance (Rc(f)) at a frequency associated with the oscillation between the coil output capacitance (Cs) and the inductor following spark breakdown, such that immediately following spark breakdown, the voltage across each of the windings in the last few bays at the high voltage end is substantially reduced from the value it would have without said inductor.