METHOD AND DEVICE FOR CALCULATING PRESSURE OF VENTURI TUBE

A method for calculating a pressure of a Venturi tube, comprising acquiring a pressure value P2 of an air inlet tube, and acquiring a pressure difference ΔP between an inlet and a throat of the Venturi tube; performing correction on the P2 by using a predetermined first correction MAP, and obtaining...

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Bibliographische Detailangaben
Hauptverfasser:	YAO, Wang, ZHANG, Chen, LUAN, Junshan, DAI, Ziyang
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	MEASURING MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME PHYSICS TESTING
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	A method for calculating a pressure of a Venturi tube, comprising acquiring a pressure value P2 of an air inlet tube, and acquiring a pressure difference ΔP between an inlet and a throat of the Venturi tube; performing correction on the P2 by using a predetermined first correction MAP, and obtaining a pressure PA of a first point before an EGR mixer; performing correction on the ΔP by using a predetermined second correction MAP, and obtaining a pressure loss PB of the Venturi tube; and summing the PA and the PB to obtain the pressure of the Venturi tube. According to the method for calculating the pressure of the Venturi tube, an inlet pressure of the Venturi tube can be collected and calculated by using a calculation mode rather than a sensor. Therefore, it is not necessary to arrange an inlet pressure sensor of the Venturi tube, the number of sensors arranged on the Venturi tube is reduced, and an exhaust flow can also be calculated. Further provided is a device for calculating the pressure of the Venturi tube.