Patent ID: 11952935
Assignee: TRANSPORTATION IP HOLDINGS, LLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 7:
8. A method, comprising:
injecting a first fuel to a combustion chamber via a direct injector positioned to inject directly into the combustion chamber;
flowing a different, second fuel to the combustion chamber via a valve positioned to inject toward an intake port of the combustion chamber;
determining a first auto-ignition exceeds a threshold level;
in response determining the first auto-ignition exceeds the threshold level:
adjusting a substitution rate of the first fuel and the second fuel; and
retarding an injection timing of the injection of the first fuel;

determining a second auto-ignition is equal to or less than the threshold level; and
in response to determining the second auto-ignition is equal to or less than the threshold level:
retarding a first fuel injection timing while maintaining the substitution rate; and
incrementally reducing the substitution rate in response to auto-ignition occurring following retarding the first fuel injection timing.