Patent ID: 6725829
Filing Date: 2004-04-27
Classification: F02B,F02D,Y02T

Abstract:
A combustion control apparatus of a diesel engine, comprising a fuel injector projecting into a combustion chamber of a cylinder of an engine,exhaust gas recirculation amount adjusting means for adjusting the amount of recirculated exhaust gas to the combustion chamber, main-injection control means for controlling said fuel injector, so that the fuel injector injects the fuel at least during either the intake stroke or the compression stroke of cylinder at a first engine operating condition to make a first combustion state where the rate of pre-mixed combustion is greater than that of diffusion combustion, while so that the fuel injector injects the fuel at least at around the top dead center of the compression stroke of cylinder at a second engine operating condition to make a second combustion state where the rate of diffusion combustion is greater than that of pre-mixed combustion, and exhaust gas recirculation control means for controlling said exhaust gas recirculation amount adjusting means, in which an EGR value relating to the amount of recirculated exhaust gas at said first engine operating condition is larger than a first predetermined value, while the EGR value at said second engine operating condition is smaller than a second predetermined value which is smaller than said first predetermined value, the combustion control apparatus comprising: latter-injection control means for performing a latter-injection when the engine operating condition transfers from one of said first and second engine operating conditions to the other thereof, wherein the fuel is injected by said fuel injector within a predetermined range of either the expansion stroke or the exhaust stroke of cylinder after the main-injection fuel injected into the combustion chamber by controlling said fuel injector by said main-injection control means begins to burn.