Internal combustion engine control system

An internal combustion engine control system comprising:

• a control unit configured to control a combustion state of an internal combustion engine based on a detection value of a temperature sensor that is configured to detect a temperature of a detection object;
• a monitor unit configured
• to calculate an estimated torque as an estimated value of an actual torque of the internal combustion engine and an engine-requested torque requested for the internal combustion engine and
• to monitor whether the estimated torque differs from the engine-requested torque by an amount greater than or equal to a predetermined criterion to be in an abnormal torque state;
• and
• a detection abnormality determination unit configured to determine whether one of the detection value and a behavior of the detection value is abnormal, wherein
• the monitor unit includes:
• a normal-state torque calculation unit configured to calculate the estimated torque by using the detection value when the detection abnormality determination unit does not determine an abnormality;
• and
• an abnormal-state torque calculation unit configured to calculate the estimated torque by inhibiting using of the detection value when the detection abnormality determination unit determines an abnormality, wherein
• the detection abnormality determination unit includes an upper and lower limit determination unit configured to determine an abnormality when the detection value exceeds a predetermined range between upper and lower limits, and
• the abnormal-state torque calculation unit is configured to:
• measure an abnormality state elapsed time that has elapsed from the determination of an abnormality by the upper and lower limit determination unit, and
• calculate the estimated torque while inhibiting using of the detection value on determination that the abnormality state elapsed time does not exceed a predetermined time.