An improved spark plug system

Details An improved spark plug system An improved spark plug system

H - Electricity

01

T

H01T 13/54 (2006.01)

Patent

CA 2169835

A spark plug system (20) incorporating a spark plug and an associated venturi passage (38) said spark plug being spaced from the venturi passage (38) and projecting outwardly from one end thereof; and an electrode member (32) surrounding one end of an insulator member (21) which in turn surrounds and is spaced from a main electrode (23) carried by the insulator member (21) with at least the tip of said main electrode (23) being so positioned whereby to create sparks between itself and the surrounding electrode member (32). The electrode member (32) is so shaped to define, with the insulator member (21) a pre-combustion chamber (30) surrounding the main electrode (23). The electrode member (32) has at least one aperture (29) related in space to the tip of the main electrode (23) of the insulator member (21) and the associated venturi passage (38), and such as to allow communication between the cylinder chamber of an associated engine and the pre-combustion chamber.

L'invention concerne un système amélioré de bougie d'allumage (20) comprenant une bougie et un passage de venturi associé (38), cette bougie étant espacée du passage de venturi et faisant saillie à une extrémité de celui-ci, et un élément d'électrode (32) entourant une extrémité d'un élément isolant (21) qui à son tour entoure l'électrode principale (23). Cette électrode est portée par l'élément isolant et au moins l'extrémité de ladite électrode principale est positionnée de manière à produire des étincelles entre cette électrode et le corps d'électrode qui l'entoure. Le corps d'électrode (32) est formé de manière à délimiter avec l'élément isolant une chambre de précombustion (30) entourant l'électrode principale. Le corps d'électrode a au moins une ouverture (29) située en face de l'extrémité de l'électrode principale de l'élément isolant et débouchant sur le passage de venturi associé, pour permettre une communication entre la chambre cylindrique d'un moteur associé et la chambre de précombustion.

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