Abstract:
Spark plug for an internal combustion engine, having a center electrode and a ground electrode arranged in radial direction around the center electrode, wherein an annular spark gap is formed between the center electrode and the ground electrode for igniting a fuel mixture by means of an electric ignition spark developing between the center electrode and the ground electrode, and wherein the ground electrode is contoured in such a way that particles reaching the region of the ground electrode can be removed from the spark gap under the influence of gravitational force.
Abstract:
An apparatus for preventing the radiation and conduction of electro-magnetic wave noises generated from the igniting device of a gasoline engine is disclosed. The igniting portion of a gasoline engine such as an igniting coil, a continuously contacting and opening contact breaker, a power distributor, and igniting plugs generate all kinds of electro-magnetic wave noises of wide frequency bands. These noises give adverse effects to the various components of an automobile or an air plane such as electric and electronic convenience devices, safety devices and engine controllers, resulting in malfunctions of the components. By shielding and absorbing such electro-magnetic wave noises, an automobile or an air plane is protected from possible accidents, and human lives are saved.