Magnetic core-coil assembly for spark ignition systems
AssigneeAlliedSignal Inc.
InventorsWilliam R. Rapoport, Paul A. Papanestor
Life of this patent
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Abstract
A magnetic core-coil assembly generates an ignition event in a spark ignition internal combustion system having at least one combustion chamber. The assembly comprises a magnetic core of amorphous metal having a primary coil for low voltage excitation and a secondary coil for a high voltage output to be fed to a spark plug. A high voltage is generated in the secondary coil within a short period of time following excitation thereof. The assembly senses spark ignition conditions in the combustion chamber to control the ignition event. The assembly is constructed from sub-assembly parts that can be manufactured with existing machines at reasonable cost.
Claims12
A magnetic core-coil assembly for generating an ignition event in a spark ignition internal combustion system having at least one combustion chamber, said assembly comprising:
- a magnetic core composed of ferromagnetic amorphous metal alloy, said core having a common primary coil for low voltage excitation and a secondary coil for a high voltage output;
- said secondary coil comprising a plurality of stacked core-coil sub-assemblies connected in series with each other that are simultaneously energized in response to the low voltage excitation of said common primary coil, each of said core-coil sub-assemblies comprising a toroidally wound section having a secondary winding wound in a predetermined direction which is different than that for each of said core-coil sub-assemblies adjacent thereto;
- said core-coil sub-assemblies, when simultaneously energized by said common primary coil, producing secondary voltages that are additive, said high voltage output being the sum of said secondary voltages which are collectively fed to a spark plug to generate the ignition event in the internal combustion system;
- and
- said magnetic core-coil sub-assembly being configured for repeatedly generating said high voltage output in said secondary coil following the low voltage excitation of said common primary coil.
Dependencies are inferred from the claim text.