Multi-fuel control system and method

A system, comprising:

• a controller operable to communicate with at least one sensor and with an engine, and thereby to control operation of the engine, wherein the engine is operable with a first fuel and a second fuel, the first fuel and the second fuel not being the same type of fuel;
• wherein the controller is configured to change or maintain the engine operation based on information regarding the first fuel and the second fuel, and further based on one or more signals received from the at least one sensor compared to determined engine operation threshold limits, and the controller is configured to change or maintain an engine fuel supply to control specific fuel consumption of at least one of the first fuel or the second fuel and to achieve values for the one or more signals in a determined range relative to the engine operation threshold limits,
• wherein the one or more signals indicate at least one of an exhaust emissions parameter or one or more of:
• a pre-turbine temperature, a fuel injection pressure, a turbocharger rotational speed, a peak firing pressure, a rate of pressure rise, or a knock intensity.