Control system for internal combustion engine, internal combustion engine system, and method of controlling internal combustion engine

An internal combustion engine system, the internal combustion engine system comprising:

• an internal combustion engine comprising:
• a plurality of cylinders;
• a first injector configured to inject a first fuel and a second injector configured to inject a second fuel into at least one cylinder of the plurality of cylinders;
• and
• a control system configured to control the internal combustion engine, the control system comprising at least one controller configured to:
• send at least one fueling command to at least one of the first injector or the second injector;
• estimate an actual fueling amount within the internal combustion engine based on a signal received from the at least one cylinder of the plurality of cylinders;
• estimate a fueling amount for the first fuel based on the actual fueling amount;
• and
• estimate a fueling amount for the second fuel based on at least one of the actual fueling amount or the fueling amount for the first fuel.

A method of controlling an internal combustion engine, the method comprising:

• receiving, by at least one controller, at least one fueling request;
• wherein the at least one fueling request comprises a first fueling request and a second fueling request, the first fueling request corresponding to a first fuel and the second fueling request corresponding to a second fuel;
• determining, by the at least one controller, a first fueling compensation amount for the first fuel;
• determining, by the at least one controller, a second fueling compensation amount for the second fuel;
• and
• determining, by the at least one controller, a first fueling command corresponding to the first fuel based on the first fueling compensation amount and a second fueling command corresponding to the second fuel based on the second fueling compensation amount,
• wherein each of the first fueling compensation amount and the second compensation amount are based on at least one pressure within at least one cylinder of a plurality of cylinders within the internal combustion engine.