Robert Boschgmbh

Alexander Schramm

Andreas Benz

Matthias Blankmeister

Stephan Kaske

Manfred Roeckelein

Mario Fleischhauer

Gabriel Petersen

Anatolij Odegov

A spark plug with a longitudinal axis. The spark plug includes a housing; an insulator disposed at least partly inside the housing; a center electrode disposed at least partly inside the insulator and having a base body and a first ignition element; and at least one ground electrode disposed inside the housing and having a base body and a second ignition element. The ground electrode and the center electrode are disposed such they form a spark gap which extends radially with respect to the spark plug longitudinal axis. A surface of the first ignition element of the center electrode which serves as ignition surfaces and a surface of the second ignition element of the ground electrode which serves as ignition surfaces are flat surfaces. A width of the spark gap is not greater than 0.3 mm, and the spark gap is formed inside the housing.

Spark plug with small spark gap and flat ignition element surfaces

A pre-chamber spark plug includes (i) a middle electrode with a first noble metal body which has a first end spark face, (ii) a ground electrode with a second noble metal body which has a second end spark face, (iii) a housing, with the ground electrode being fixed in the housing, (iv) an insulator which electrically insulates the middle electrode with respect to the ground electrode, and (v) a cap, which together with a part of the housing, defines a pre-chamber. The first end spark face and the second end spark face are arranged oppositely at a distance from one another.

Economical pre-chamber spark plug

Growing community of inventors

Knetzgau, Germany

Alexander Schramm