Method for adapting a fuel quantity to be injected in an internal combustion engine

An engine control unit for operating an internal combustion engine, the engine control unit configured to:

• operate the internal combustion engine including a lambda regulation which sets a fuel quantity to be injected by an injector connected to a fuel tank via a fuel line in accordance with a predefined setpoint lambda value;
• at preset times, carry out a filter cleaning operation for a fuel tank ventilation;
• as a function of the presence of a release condition of the internal combustion engine, carry out an adaptation of the lambda regulation by adapting at least one adaptation parameter as a function of operating variables of the internal combustion engine;
• at active filter cleaning operation and upon the presence of the release condition, injecting fuel using the injector connected to the fuel tank via the fuel line, wherein the operating variables which are required to carry out the adaptation of the lambda regulation are recorded without being used for the lambda regulation, and at deactivated filter cleaning operation and presence of the release condition, the adaptation of the lambda regulation being carried out as a function of the recorded operating variables.

A non-transitory machine-readable storage medium on which is stored a computer program for operating an internal combustion engine, the computer program, when executed by a data processing device, causing the data processing device to perform the following steps:

• operating the internal combustion engine including a lambda regulation which sets a fuel quantity to be injected by an injector connected to a fuel tank via a fuel line in accordance with a predefined setpoint lambda value;
• at preset times, carrying out a filter cleaning operation for a fuel tank ventilation;
• as a function of the presence of a release condition of the internal combustion engine, carrying out an adaptation of the lambda regulation by adapting at least one adaptation parameter as a function of operating variables of the internal combustion engine;
• and
• at active filter cleaning operation and upon the presence of the release condition, injecting fuel using the injector connected to the fuel tank via the fuel line, wherein the operating variables which are required to carry out the adaptation of the lambda regulation are recorded without being used for the lambda regulation, and at deactivated filter cleaning operation and presence of the release condition, the adaptation of the lambda regulation is carried out as a function of the recorded operating variables.