Monitoring method, system and storage medium for cooling efficiency of exhaust gas recirculation system

Abstract

The invention provides a monitoring method, system and storage medium for the cooling efficiency of an exhaust gas recirculation system, including the temperature T of the exhaust gas at the outlet of the cooler out , The air intake volume of the intake pipe m 1 and the air intake temperature T of the intake pipe 1 , The total intake volume V of the engine intake manifold 2 and the total intake pressure P 2 , calculate the intake air temperature T of the engine intake manifold 2 ; Obtain the engine speed and cycle fuel injection quantity, and determine the real-time combustion temperature rise temperature dT according to the engine speed and cycle fuel injection quantity; according to the real-time combustion temperature rise temperature dT and the intake air temperature T of the engine intake manifold 2 Calculate the exhaust temperature T of the exhaust manifold of the engine 3 ;Get the inlet water temperature T of the cooler W ;According to the inlet water temperature T of the cooler W , The exhaust temperature T of the exhaust manifold of the engine 3 and the exhaust gas temperature T at the outlet of the cooler out The cooling efficiency ε of the exhaust gas recirculation system is obtained. The method for monitoring the cooling efficiency of the exhaust gas recirculation system has the advantages of low manufacturing cost and simple algorithm.

Description

Technical field [0001] The present invention relates to the field of cooling efficiency monitoring of automotive exhaust gas recirculation systems, and more particularly to a monitoring method, system, and storage medium for cooling efficiency of exhaust gas recirculation system. Background technique [0002] The Exhaust Gas Recirculation (EGR) system is the main means of reducing NOx emissions at present, the principle is to introduce a portion of exhaust gas in the exhaust pipe into an intake manifold, and reduce the exhaust gas of extremely low oxygen content to enter the engine cylinder. The oxygen concentration is lowered, and the combustion temperature is lowered, and the low-temperature hypoxic combustion environment is reached, thereby reducing the generation of NOx. [0003] The EGR system generally adds a cooler (heat exchange device) to the EGR line to reduce the EGR gas flow temperature, reach the low temperature condition, and the requirements of the EGR downstream t...

AI Technical Summary

Problems solved by technology

[0011] The main purpose of the present invention is to provide a monitoring method, system and storage medium for the cooling efficiency of an exhaust gas recirculation system, aiming to solve the technical problems of complex or high-cost cooling efficiency detection methods in the prior art

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