Patent ID: 6460491
Filing Date: 2002-10-08
Classification: F02B,F02M,Y02T

Abstract:
A method for reducing NOx and smoke emissions from a diesel engine during periods of transient changes in an engine load demand, wherein said engine has at least one combustion chamber and an injector in fluid communication with said combustion chamber, said injector injecting fuel into said combustion chamber and selectively injecting water with said fuel into said combustion chamber, said method comprising:monitoring at least one engine operating parameter representative of an engine operation in a combustion cycle of the engine during operation of said engine; detecting a change in the engine load demand; determining an engine operating condition resulting from said detected change in the engine load demand that is indicative of at least one of a high smoke and a high NOx condition; co-injecting water and fuel through said injector and into said combustion chamber in response to said determined at least one of a high smoke and a high NOx condition; and terminating said co-injection of water and fuel in response to determining an absence of the engine operating condition resulting from said detection in the change in engine load demand indicative of the at least one of a high smoke and a high NOx condition.