Magnetic core-coil assembly for spark ignition systems

H - Electricity – 01 – F

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H01F 38/12 (2006.01)

Patent

CA 2253571

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. The assembly is then potted in a housing consisting of a high temperature polymer.

Un ensemble bobine/noyau magnétiques produit un allumage dans un système d'allumage commandé possédant au moins une chambre de combustion. Cet ensemble comprend un noyau magnétique en métal amorphe possédant une première bobine pour une excitation basse tension et une deuxième bobine pour une sortie haute tension alimentant une bougie d'allumage. Une tension élevée est produite dans la deuxième bobine pendant une courte durée après son excitation. L'ensemble détecte l'état d'allumage dans la chambre de combustion afin de commander l'allumage. Cet ensemble est fabriqué à partir de pièces de sous-ensembles pouvant être produites avec des machines existantes de façon économique. On encastre ensuite cet ensemble dans un boîtier constitué par un polymère haute température.

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