Abgasemissionssteuervorrichtung für eine Brennkraftmaschine

摘要

A recognition unit recognizes machines combustion characteristic, based on the parameter related to one of the machine revolution numbers and machine loads. An electronic control unit (80) selects one of the control modes stored in a memory, to perform temperature rise of NOx catalyst based on recognized machine's combustion characteristic. The control modes in memory control fuel injection unit perform sub fuel injection into engine before/after performing main fuel injection into engine, respectively. One of the control modes adjusts flow amount of exhaust gas which is recirculated in recirculation route and increases the quality of the inert gas of intake side of the system. The control mode controls a reducer addition unit to perform addition of reducer to NOx catalyst in the exhaust gas type of the engine. A recognition unit recognizes temperature set in exhaust-steam admission into club of NOx catalyst. A prohibition unit prohibits continuous operation of reducer increase-in-quantity, based on the recognized temperature and amount of reduction component.