System for determining and regulating EGR (Exhaust Gas Recirculation) mass flow and use method thereof

Abstract

The invention provides a system for determining and regulating EGR (Exhaust Gas Recirculation) mass flow. The system comprises an EGR valve and a processor, wherein the EGR valve is connected with the output end of the processor by virtue of an EGR valve motor; the inlet of the EGR valve is provided with a sensor I; the outlet of the EGR valve is provided with a sensor II; the EGR valve motor is provided with a position opening sensor; the sensor I is a temperature and pressure sensor; the sensor II is a pressure sensor; The output ends of the sensor I, the sensor II and the position opening sensor are in signal connection with the input end of the processor. When the system is in use, the flow characteristic curve of the EGR valve is calibrated firstly and then stored into the processor, then the processor is used for calculating real-time EGR mass flow according the real-time data and the flow characteristic curve received by the processor and regulating the opening size of the EGR valve; due to the design, the cost is lowered, and the method is simple, convenient and practical.

Description

technical field [0001] The invention relates to a flow measurement system and its use method, in particular to a system for determining and adjusting EGR mass flow and its use method, which is particularly suitable for reducing costs and simplifying the measurement method. Background technique [0002] In order to protect the living environment of our planet, countries are increasingly advocating the concept of low-carbon and environmentally friendly life. Due to the development of social economy, the engine has become an indispensable force in daily transportation and other aspects. With the increasing number of vehicles, the pollutants emitted by them continue to endanger the surrounding environment. Engine emissions mainly include nitrogen oxides and particulates. Nowadays, the emission regulations of diesel engines in various countries in the world are becoming increasingly stringent, while reducing NOx and soot has become a common problem and challenge we are facing. ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of relatively high cost and relatively complicated measurement methods in the prior art, and provide a system for determining and adjusting EGR mass flow rate with relatively low cost and simple measurement and its use method

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