Patent ID: 6804952
Filing Date: 2004-10-19
Classification: F02D,F02P,Y02T

Abstract:
A diesel engine comprising:a combustion chamber; a fuel injection device for injecting fuel into the combustion chamber; a catalyst for purifying exhaust gases from the combustion chamber; and a controller for controlling a plurality of devices of the diesel engine including the fuel injection device; wherein the controller is configured to perform operation in a first warm-up mode in an early warm-up period after startup of the diesel engine, and to perform operation in a second warm-up mode in a late warm-up period after the early warm-up period, so as to accelerate and maintain activation of the catalyst; wherein the first warm-up mode is configured to provide more energy to the catalyst with exhaust gases than a normal operation mode of the diesel engine, the normal operation mode being performed after the late warm-up period; wherein the second warm-up mode is configured to provide exhaust gases of higher temperature to the catalyst than the normal operation mode; and wherein the second warm-up mode provides a smaller exhaust gas flow to the catalyst than both the first warm-up mode and the normal operation mode.