New spark plug

H - Electricity – 01 – T

Patent

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Details

H01T 13/02 (2006.01)

Patent

CA 2162405

A novel spark plug is provided herein. Such spark plug includes an insulator body provided with a longitudinally-extending through bore. A one-piece, central electrode is secured within the longitudinally-extending through bore while simultaneously providing an annular zone communicating with a combustion chamber. An earth lower electrode projects diametrically-inwardly towards the central electrode and is spaced a longitudinally-fixed distance beyond the lower end of the central electrode. A first, non-central, longitudinally-extending bore in the insulator body is connected to a fuel metering device for controllably admitting fuel to the combustion chamber. A second, non-central, longitudinally-extending bore in the insulator body is connected between the combustion chamber and an exhaust manifold to exhaust gases from the combustion chamber. A lower-threaded base is provided for connection of the spark plug to an opening in the combustion chamber.

L'invention a trait à une bougie d'allumage innovatrice. Cette bougie d'allumage comprend un corps isolant percé d'un trou dans le sens longitudinal. Une électrode centrale monopièce est fixée dans le trou longitudinal de manière à former une zone annulaire communiquant avec une chambre de combustion. Une prise de terre inférieure est inclinée diamétralement vers l'intérieur en direction de l'électrode centrale et espacée longitudinalement du bout inférieur de l'électrode centrale. Un premier trou longitudinal non central dans le corps isolant est raccordé à un dispositif de mesure du carburant pour admettre le carburant de façon contrôlée dans la chambre de combustion. Un deuxième trou longitudinal non central dans le corps isolant relie la chambre de combustion et un collecteur d'échappement pour évacuer les gaz de la chambre de combustion. La bougie d'allumage comporte un culot à partie inférieure filetée permettant de la fixer dans un orifice de la chambre de combustion.

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