Patent ID: 9217384
Filing Date: 2015-12-22
Classification: F01N,F02D,Y02T

Abstract:
1. A method for operating an internal combustion engine including multiple cylinders corresponding to respective injection valves for the metering of fuel, an exhaust-gas probe arranged in an exhaust tract and configured to generate a measurement signal representative of an air/fuel ratio in a respective cylinder, and a crankshaft angle sensor configured to generate a measurement signal representative of a crankshaft angle of a crankshaft, the method comprising: within a predefined operating range of the internal combustion engine, when at least one predefined condition is met, performing a cylinder-specific diagnosis with regard to pollutant emissions, during the cylinder-specific diagnosis, defining in a cylinder-segment-synchronous manner a forced inducement configured to induce a predefined air/fuel ratio to be set, and during successive working cycles: