KNOCKING CONTROL SYSTEM FOR GAS ENGINE

A knocking control system 1 comprises a knocking determiner device 24 for determining whether or not a knocking with a predetermined intensity or higher has occurred in a cylinder 3 of a gas engine 2 in each cycle; an integration variable calculator 30 which adds 1 to an integration variable CT when the knocking determiner device 24 determines that the knocking with the predetermined intensity or higher has occurred, and subtracts 1 from the integration variable CT when the knocking determiner 24 determines that the knocking with the predetermined intensity or higher has not occurred; and a main controller 20 for reducing a power output of the cylinder 3 if the integration variable CT is not less than a threshold.