METHOD FOR CONTROLLING THE INJECTION OF COOLANT INTO AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE AND RELATED MOTOR VEHICLE AND COMPUTER PROGRAM PRODUCT

Method for controlling the injection of a coolant into a combustion chamber (8) of an internal combustion engine (7) of a motor vehicle (1); the motor vehicle (1) comprises a vehicular powertrain (2) comprising a propulsion unit (4) and a transmission system interposed between the propulsion unit (4) and drive wheels (6) of the motor vehicle (1), the propulsion unit (4) comprises at least the internal combustion engine (7). The propulsion unit (4) comprises at least one cylinder (9) comprising at least a first and a second injector (10A, 10B) configured to inject fuel and the coolant, respectively, into the combustion chamber (8) or into the intake duct of the internal combustion engine (7). The method comprises the steps of: acquiring (S100) at least one electrical signal (SI1, SIi); determining (S101) a corresponding quantity (FFS1, FFSi) indicative of the rate of the combustion reaction within the internal combustion engine (7) based on the acquired electrical signal (SI1, SIi) associated with the operation of the injectors (10A, 10B); verifying (S102-S105, S110) that the quantity (FFS1, FFSi) indicative of the rate of the combustion reaction within the internal combustion engine (7) meets a control criterion; if the quantity (FFS1, FFSi) indicative of the rate of the combustion reaction within the internal combustion engine (7) meets the control criterion, performing (S106-S109) first actions to control the injection of coolant into the combustion chamber (8); and if the quantity (FFS1, FFSi) indicative of the rate of the combustion reaction within the internal combustion engine (7) does not meet the control criterion, performing (S111-S114) second actions to control the injection of coolant into the combustion chamber (8).