MONITORING OF LEAKS IN AN EXHAUST TREATMENT SYSTEM OF AN INTERNAL COMBUSTION ENGINE

摘要

In a method of monitoring leaks in an exhaust treatment system of an internal combustion engine (10) having a three-way catalytic converter (14) with or without a nitrogen oxide trap (16) and an electronic engine control unit (12) with a device for fixing the air/fuel ratio lambda to be supplied to the engine as a function of various engine operating parameters, in the event of temperatures determined at the catalytic converter exceeding specific limiting values, stoichiometric operation is set and lambda control is interrupted.