Method for operating an internal combustion engine

A control unit for operating an internal combustion engine with intake manifold injection and direct injection, the control unit comprising:

• a processor, wherein the processor is configured to:
• ascertain a value of at least one parameter that is correlated with an exhaust gas of a combustion chamber of the internal combustion engine and that is influenced by purging of uncombusted fuel through the combustion chamber into the exhaust gas;
• responsive to concluding, based on the ascertained value of the at least one parameter, that uncombusted fuel is purged, adjust at least one operating parameter for filling the combustion chamber in order to avoid upstream or downstream deposition of fuel in an intake manifold, wherein the at least one operating parameter includes a fuel quantity to be introduced into the intake manifold via intake manifold injection and an injection duration of the intake manifold injection;
• and
• responsive to ascertaining, during the adjustment of the at least one operating parameter, that a fuel quantity to be introduced into the combustion chamber is not completely introducible into the combustion chamber via the intake manifold injection, set a fuel quantity to be introduced into the combustion chamber via direct injection, to covers at least a portion of the fuel quantity to be introduced into the combustion chamber that is not introducible into the combustion chamber via the intake manifold injection.

A non-transitory computer-readable medium on which are stored instructions that are executable by a processor and that, when executed by the processor, cause the processor to method for operating an internal combustion engine with intake manifold injection and direct injection, the method comprising:

• ascertaining a value of at least one parameter that is correlated with an exhaust gas of a combustion chamber of the internal combustion engine and that is influenced by purging of uncombusted fuel through the combustion chamber into the exhaust gas;
• responsive to concluding, based on the ascertained value of the at least one parameter, that uncombusted fuel is purged, adjusting at least one operating parameter for filling the combustion chamber in order to avoid upstream or downstream deposition of fuel in an intake manifold, wherein the at least one operating parameter includes a fuel quantity to be introduced into the intake manifold via intake manifold injection and an injection duration of the intake manifold injection;
• and
• responsive to ascertaining, during the adjustment of the at least one operating parameter, that a fuel quantity to be introduced into the combustion chamber is not completely introducible into the combustion chamber via the intake manifold injection, setting a fuel quantity to be introduced into the combustion chamber via direct injection, to covers at least a portion of the fuel quantity to be introduced into the combustion chamber that is not introducible into the combustion chamber via the intake manifold injection.