Patent ID: 8103430

Claim:
A method for the diagnosis of the uneven distribution of a fuel-air mixture fed to the individual cylinders of an internal combustion engine comprising a plurality of cylinders, the method comprising the steps of: supplying the air via a throttle flap and the fuel for each cylinder via an injection valve and wherein following the combustion of the fuel-air mixture, sensing a lambda value of the created exhaust gas, wherein the uneven distribution for each cylinder is individually determined depending on the operating mode of the internal combustion engine by determining a lambda value or an operational roughness of the internal combustion engine, the values individually determined for the individual cylinders are compared with a limit value predetermined for the internal combustion engine and upon exceeding of the predetermined limit value for the cylinder concerned a fault entry is made in a fault memory, that upon exceeding of the predetermined limit value the fuel quantity to be injected for the cylinder concerned is corrected so that the predetermined limit value is maintained with a subsequent injection, with unsuccessful correction of the cylinder concerned the fuel supply to the cylinder concerned is limited to a maximum or a minimum value.