FORBRENNINGSFORFARANDE OCH ANORDNING FOR UTOVANDE AV FORFARANDET VID EN SEPARATTEND, LUFTTETANDE FORBRENNINGSMOTOR

摘要

A combustion process and apparatus for a spark ignited air compressing internal combustion engine with direct injection of the major portion of the fuel onto the wall of the combustion chamber provided in the piston in the form of a body of revolution, according to which a rotary motion is imparted upon the inflowing air in such a way that the fuel is gradually released from the combustion chamber wall and mixed with the air in the form of vapors. The injection nozzle is positioned in the cylinder head near the combustion chamber throat while the ignition device extends into the combustion chamber at the top dead center position of the piston. The fuel is injected onto the combustion chamber wall by means of a jet from which individual small fuel particles are detached which are immediately mixed with the air on being emitted from the injection nozzle opening. The small amount of combustible mixture formed by the fuel particles detached from the fuel jet and not yet conveyed by the centrifugal forces onto the wall is toward the end of the injection phase ignited close to the injection nozzle opening by the ignition device. The thus initiated combustion propagates in the direction of the revolving air across to the fuel film existing on the wall of the combustion chamber in the piston. Subsequently the main combustion takes place in conformity with the progress of the mixture of the fuel vapors generated in the wall region with the air circulating in the combustion chamber.