Bayerische Motoren Werke Aktiengesellschaft

Ngk Spark Plug Company, Limited

Josef Holzmann

Alfred Krappel

Johannes Guggenmos

Wataru Matsutani

Junichi Kagawa

Robert Tschuk

Georg Buchholz

An ignition device for piston internal combustion engines with a moving piston electrode disposed in the piston face and a counter-electrode arranged in the cylinder head, and with a spark gap forming between the two electrodes wherein the spatial arrangement of the two electrodes is such that the spark gap is smaller than the minimum distance between the counter-electrode and the piston face.

Ignition device for piston-type internal combustion engines

An ignition unit for internal combustion engines with an ignition coil having a ferromagnetic core integrated with a spark plug connector, about the main core of which is arranged a primary winding and a secondary winding surrounded by an insulating body; the ignition coil and the spark plug connector are so arranged to one another that the axial directions of the spark plug connector and of the main core of the ignition coil form at least approximately a right angle.

Ignition unit for internal combustion engines

The outer or side electrode of a spark plug is configured as a flat plate confronting the center electrode to define a gap, and fixed to the threaded shell or body of the plug by a plurality of spider legs. A plurality of holes are formed in the plate to improve the plug durability and retard any discharge voltage increases.

Spark plug with counterelectrode having plural apertures in flat portion

Ignition system for internal combustion engines

Growing community of inventors

Munich, Germany

Josef Holzmann