Patent ID: 11933243
Assignee: ROLLS-ROYCE SOLUTIONS GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G  Y | IPC F  G

Claim 13:
14. An internal combustion engine, comprising:
at least one combustion chamber;
at least one injector which is configured for introducing a fuel into the at least one combustion chamber; and
a control unit, which is configured for:
capturing respectively a wear value for the at least one injector for a plurality of fuel introduction events into the at least one combustion chamber of the internal combustion engine;
assigning each respective one of the wear value that is captured to a respective one of a plurality of wear value classes;
determining, for each of the plurality of wear value classes, a class frequency of a plurality of the wear value that are detected and assigned to a corresponding one of the plurality of wear value classes;
calculating, based on a plurality of class frequencies of the plurality of wear value classes, a total wear value for the injector; and
evaluating a condition of the at least one injector based on the total wear value, as a respective one of the wear value a cavitation number being captured which is characteristic of a cavitation occurring at the injector during a respective one of the plurality of injection events, the cavitation number being determined based on a plurality of pressure conditions at the injector, depending on a fuel pressure at the injector, as a quotient of a difference between the fuel pressure at the injector and a back pressure divided by the back pressure.