초록 ▼

A 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

A 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-inward 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 connects the spark plug to an opening in the combustion chamber.

대표청구항 ▼

[ What is claimed is:] [1.] A spark plug, comprising:an insulator body having a longitudinally-extending through bore;a one-piece, central electrode secured within said longitudinally-extending through bore and providing an annular zone for communicating with combustion chamber;an earth lower electr

[ What is claimed is:] [1.] A spark plug, comprising:an insulator body having a longitudinally-extending through bore;a one-piece, central electrode secured within said longitudinally-extending through bore and providing an annular zone for communicating with combustion chamber;an earth lower electrode projecting towards said central electrode and spaced a longitudinally-fixed distance beyond a lower end of said central electrode;a first, non-central, longitudinally-extending bore within said insulator body for connection to a fuel metering device for controllably admitting fuel to the combustion chamber;a second, non-central, longitudinally-extending bore within said insulator body for connection between said combustion chamber and an exhaust manifold to exhaust gases from the combustion chamber; anda lower-threaded base for connection to an opening in the combustion chamber.