Detection and reduction of an injection volume difference in a combustion engine with multiple cylinders

The consecutive pressure values of pressure tube (14) are acquired before fuel injection into cylinder for all cylinders (2-5). The consecutive pressure values of pressure tubes after the injection of fuel into cylinder are acquired for each cylinder. The statistical analysis of acquired pressure values is performed. The pressure difference value of cylinder is determined based on acquired pressure values, when the pressure values satisfy preset statistical property. The fuel injection quantity difference of cylinders is determined as function of pressure difference value. An independent claim is included for device for determining injection quantity difference of cylinders in internal combustion engine.