Patent ID: 6840209
Filing Date: 2005-01-11
Classification: F02B,F02D,Y02T

Abstract:
1. A direct injection diesel engine comprising a combustion chamber defined by a cylinder, cylinder head and piston, a cavity formed as a recess in said piston defining and forming part of said combustion chamber, and a fuel-injection nozzle that injects fuel into said combustion chamber, in which there is provided a conventional injection mode in which fuel is injected from said fuel injection nozzle with a timing in the vicinity of the compression top dead center of said piston and a homogeneous charge compression injection mode in which fuel is injected from said fuel injection nozzle with a timing that is earlier then that in the conventional injection mode and such that fuel ignition does not occur at least until injection has been completed, fuel injection being performed by said conventional injection mode during full load operation of the engine and fuel injection being performed by said homogeneous charge compression injection mode during part load operation of the engine, wherein the injection angle of said fuel injection nozzle with respect to the nozzle axis is a fixed angle such that in said conventional injection mode fuel reaches the inside wall of the cavity on the outside in the radial direction from the lowermost position of said cavity and in said homogeneous charge compression injection mode fuel reaches at least the inside wall of the cavity.