Fuel injection control device enables efficiency of three way catalyst to reduce nitrogen oxide(s) emissions to be exploited

摘要

A control process and control device for fuel injection regulates the air-fuel ratio fed into a combustion engine fitted with a catalyst in its exhaust system for the reduction of NOx. The catalyst is a porous Al2O3 carrier treated with Rh, Pt and/or Pd and La. The air-fuel mixture ratio is regulated on the basis of parameters which indicate the running state of the engine and/or show properties of factors which refer to the period of time the engine has operated under predetermined running conditions.