Combustion engine

A method for operation of a combustion engine for combustion of an air-fuel mixture containing air and fuel, wherein the method comprises:

• determining a target knock value and an actual knock value of the fuel and/or the air-fuel mixture;
• obtaining a temperature of the air-fuel mixture downstream from mixing of the air and the fuel and upstream from at least one temperature adjuster;
• and
• controlling the temperature of the air-fuel mixture based on the target knock value versus the actual knock value by controlling the at least one temperature adjuster downstream from compression of the air-fuel mixture and upstream from a combustion chamber of the combustion engine, wherein the target knock value and the actual knock value comprise a knock resistance or a knock probability.

A computer program product for operation of a combustion engine for combustion of an air-fuel mixture containing air and fuel, comprising instructions causing an executing computer to perform the following:

• determining a target knock value and an actual knock value of the fuel and/or the air-fuel mixture;
• obtaining a temperature of the air-fuel mixture downstream from mixing of the air and the fuel and upstream from at least one temperature adjuster;
• and
• outputting control signals to at least one temperature adjuster to control the temperature of the air-fuel mixture based on the target knock value versus the actual knock value downstream from compression of the air-fuel mixture and upstream from a combustion chamber of the combustion engine, wherein the target knock value and the actual knock value comprise a knock resistance or a knock probability.

A combustion engine for combustion of an air-fuel mixture containing air and fuel, comprising:

• a mixer configured to mix the air the fuel to obtain the air-fuel mixture;
• a sensor configured to sense the temperature of the air-fuel mixture;
• a compressor configured to compress the air-fuel mixture downstream from the sensor;
• at least one temperature adjuster configured to cool or heat the air, the fuel, and/or the air-fuel mixture, wherein the at least one temperature adjuster is downstream from the compressor, wherein the at least one temperature adjuster comprises at least one intercooler and/or at least one fluid circuit with a temperature adjusting fluid;
• and
• a controller configured to control a temperature of the fuel and/or the air-fuel mixture based on a target knock value versus an actual knock value by controlling the at least one temperature adjuster, wherein the target knock value and the actual knock value comprise a knock resistance or a knock probability.