Method For Operating an Internal Combustion Engine

摘要

A mixture pilot control for operating an internal combustion engine, in particular a gasoline engine of a motor vehicle, is provided. The mixture pilot control determines at least one composition of an air-fuel mixture required for a predetermined target air-fuel mixture ratio. The internal combustion engine is also provided with a lambda control with at least one lambda probe arranged in the exhaust gas flow of the internal combustion engine for determining a deviation of the actual air-fuel ratio from the predetermined target air-fuel ratio. Operating-parameter-dependent correction factors for the composition of the air-fuel mixture by the mixture pilot control are determined in dependence on the lambda control deviation, at least one of the load and/or the rotational speed and/or the temperature of the internal combustion engine, and further operating parameters of the vehicle other than the load, rotation speed or temperature of the internal combustion engine.

主权项

1. A method for operating an internal combustion engine of a motor vehicle having a mixture pilot control which determines at least one composition of an air-fuel mixture required for a predetermined target air-fuel mixture ratio and a lambda control with at least one lambda probe arranged in the exhaust gas flow of the internal combustion engine, comprising the acts of:
determining the at least one composition of the air-fuel mixture required for the predetermined target air-fuel mixture ratio by the mixture pilot control; determining from at least one of a load on, a rotational speed of, and a temperature of, the internal combustion engine a first operating-parameter-dependent correction factor for the at least one composition of the air-fuel mixture determined by the mixture pilot control; determining from a vehicle operating parameter other than the load on, the rotational speed of, or the temperature of, the internal combustion engine a second operating-parameter-dependent correction factor for the at least one composition of the air-fuel mixture determined by the mixture pilot control; determining a corrected air-fuel mixture by adjusting the at least one composition of the air-fuel mixture required for the predetermined target air-fuel mixture ratio by the mixture pilot control by the first and second operating-parameter-dependent correction factors; and controlling a fuel injection quantity by the mixture pilot control in accordance with the corrected air-fuel mixture.