FIELD: vehicles.
SUBSTANCE: invention relates to vehicles, to a method and device for calculating the pressure in a Venturi tube. The method for calculating the venturi pressure comprises the following steps: obtaining an air inlet pressure value P2 and obtaining a pressure difference ΔP between the inlet and the mouth of the venturi; performing a P2 adjustment with a predetermined first MAP adjustment and obtaining a first point pressure PA before the EGR mixer; performing a ΔP correction with a predetermined second MAP correction and obtaining a venturi pressure loss PB; and summation of PA and PB to obtain the venturi pressure. According to the method for calculating the venturi pressure, the inlet pressure of the venturi can be collected and calculated using a calculation mode other than a sensor. Additionally, a venturi pressure calculation device is provided.
EFFECT: it is not necessary to place an intake venturi pressure sensor, the number of sensors placed on the venturi is reduced, and the exhaust flow rate can also be calculated.
10 cl, 4 dwg
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