AN ARRANGEMENT FOR FUEL INJECTION AND IGNITION OF AN AIR-FUEL MIXTURE IN AN INTERNAL COMBUSTION ENGINE CYLINDER

摘要

An arrangement for fuel injection and ignition of a fuel-air mixture in the compression chamber in a cylinder (12) of an internal combustion engine, wherein the cylinder (12) includes a moveable piston (18) which is preferably provided with an earth electrode. The arrangement includes a combined injection and ignition device (38) which can be fastened in a through-penetrating accommodation opening (32) in the cylinder head (10) of the engine, wherein said device (38) includes an attachment part (40) and an effective or active part (46) that projects out from said attachment part and that has an end part (48) which projects into the compression chamber when said device is fastened in the cylinder head. This end-part (48) includes an injection nozzle (50) which has connected thereto an ignition electrode (52) that forms a central electrode in said device (38), said device also functioning as a sparking plug. Mounted in the front part (58) of the accommodation opening (32) that opens out into the compression chamber is an electrically conductive ring-part (62) which is provided with an earth electrode and which surrounds the effective or active part (46) of the injection and ignition device and the earth electrode (60) of which forms a side electrode relative to the central electrode (52).