Abstract: An injection and ignition device is disclosed, for preparing, injecting and igniting a stratified air-fuel charge inside the cylinder of an internal combustion engine. The device comprises and injection valve, ignition means and a combustion shell surrounding the injection valve and ignition means. The combustion shell has a plurality of flame nozzles cut through its walls. The injection valve divides the total amount of fuel injected per cycle into a main dose and a pilot dose. The main dose is injected into the combustion chamber, forming a lean mixture therein. The smaller pilot dose is injected inside the combustion shell, forming a rich moisture therein. The ignition means easily ignite this rich mixture. As the fuel burs inside the combustion shell, the pressure therein will rise and the combustion flames will be ejected through the flame nozzles into the combustion chamber. Thus torch ignition of the lean mixture field occurs.

Abstract: A direct injection fuel system for internal combustion engines is disclosed, which relies on a novel device for preparing, injecting and igniting a stratified air-fuel charge inside the cylinder of an internal combustion engine.