Patent ID: 6877366
Filing Date: 2005-04-12
Classification: F01N,F02D,Y02T

Abstract:
1. A test method for an exhaust gas catalytic converter of an internal combustion engine comprising the steps of: Test injection of fuel during the expansion stroke and/or during the exhaust stroke of the internal combustion engine, Conversion in the exhaust gas catalytic converter of at least a part of the unburned fuel contained in the exhaust gas of the internal combustion engine, Exhaust gas recirculation of exhaust gas removed downstream of the exhaust gas catalytic converter, together with the unconverted fuel from the test injection, into an intake manifold of the internal combustion engine, Determination of the increase in power of the internal combustion engine, which increase results from the exhaust gas recirculation of the unconverted fuel, Determination of the quantity of unconverted fuel in the exhaust gas catalytic converter from the increase in power of the internal combustion engine, and Determination of the operating capacity of the exhaust gas catalytic converter from the quantity of unconverted fuel.