
Emision Control Sub Systems Closed Lop Fedback Control System heart emisions control system closed lop fuel fedback control system responsible controling content catalytic converter fed gas ultimately. .controling fuel delivery oxygen content exhaust stream held narow range suports eficient operation thre way catalytic converter air fuel ratio begins deviate preprogramed swings catalyst eficiency fals dramaticaly reduction NOx. model adaptive corection factor caled VF Voltage Target Long Term Fuel Trim serial data equiped vehicles checked Diagnostic Tester EMISION SUB SYSTEMS Closed Lop Fedback Control System Page 8. PDF