Patent ID: 6543408
Filing Date: 2003-04-08
Classification: F02B,Y02T

Abstract:
A gasoline engine having direct fuel injection, comprising:a combustion chamber delimited in each cylinder by a longitudinally movable piston and an inner wall of a cylinder head; an injector having an injection nozzle configured to inject fuel in a conical shape into the combustion chamber to form an ignitable fuel/air mixture with separately supplied combustion air; and a spark plug having electrodes arranged outside a lateral surface of a conical fuel jet generated by the injection nozzle in a region of a mixture vortex; wherein the combustion chamber is configured so that the fuel is injected in a form of a free jet having a hollow cone shape; wherein the fuel jet is substantially uninfluenced by a combustion chamber perimeter so that fuel vortices form substantially independently of a shape of the combustion chamber; and wherein the electrodes of the spark plug project into a fuel vortex that develops from the lateral surface of the free jet during injection.