Patent ID: 6212880
Filing Date: 2001-04-10
Classification: B01D,F01N,F02D,Y02A

Abstract:
An engine control device comprisinga means for determining the amount of air taken into a cylinder of the engine;a means for calculating the amount of fuel injected so as to achieve a target air-to-fuel ratio;a means for calculating the amount of time that power must be supplied to an injector, so as to inject said amount of fuel;an injector for supplying fuel to said engine during the time power must be supplied obtained by said means for calculating the time power must be supplied;a means for igniting a combustible mixture by generating sparks with an ignition plug at a designated ignition time; anda lean NOx catalyst for cleaning exhaust gas released from said engine, which further comprisesa means for determining or estimating the deteriorating condition of said lean NOx catalyst, anda means for reactivating a clean up rate by reactivating the clean up rate of said lean NOx catalyst based on a result obtained by said means for determining or estimating the deteriorating condition of said lean NOx catalyst.