FIELD: mechanical engineering: internal combustion engines. SUBSTANCE: invention relates to fuel injection devices of internal combustion engines and method of determining parameters of air taken by engine. According to proposed method, mass air flow rate is measured by respective flowmeter, and air humidity is determined by humidity sensor. Mass flow rate of air and humidity of air are measured simultaneously with measuring pressure in intake gas liner, and results, thus obtained, are processed in one processing circuit. Measuring unit for internal combustion engine contains air flowmeter with sensitive element for determining mass flow rate of air taken into internal combustion engine. Humidity sensor and/or pressure pickup and processing circuit for date received from air flowmeter, from its sensitive element, from humidity sensor and from pressure pickup are arranged close to air flowmeter, i. e. near its sensitive element, preferably in common housing. Invention makes it possible to determine parameters of air taken by internal combustion engine and amount of air directly combustion in internal combustion engine. EFFECT: enhanced operation reliability. 8 cl, 5 dwg
