EGR rate prediction method and device, equipment and medium

Abstract

The invention discloses an EGR rate prediction method and device, equipment and a medium, and the method comprises the steps: building an initial basic model according to a first actual structure parameter of an engine and a second actual structure parameter of an EGR system; inputting a first basic performance parameter into the engine virtual model, and inputting a flow characteristic parameterand a pressure loss characteristic parameter into the EGR virtual model, so the initial basic model is updated into the first basic model; inputting each EGR valve opening parameter to the first basicmodel, so that the first basic model simulates operation under each EGR valve opening parameter, and determining each corresponding first EGR rate of the first basic model under each EGR valve opening parameter. The EGR virtual model is established through the basic performance parameters of the engine, and the EGR rate of the EGR system of the initial basic model under a certain working condition is determined through EGR virtual model simulation, so accurate reference parameters of the EGR system can be provided for the engine when the engine enters a test stage, and the research and development period of the engine is shortened.

Description

technical field [0001] The invention relates to the technical field of automobile simulation, in particular to an EGR rate prediction method, device, equipment and medium. Background technique [0002] In order to meet the increasingly stringent fuel consumption and emission regulations challenges of gasoline engines, the external cooling EGR (Exhaust Gas Re-circulation, exhaust gas recirculation system) technology is currently favored by various car companies. [0003] When developing an engine, firstly determine the parameters of the complete engine, which is a bare metal that has not yet built an EGR system; then determine the EGR system that needs to be built for the engine through simulation. [0004] However, in related technologies, the simulation of the EGR system has not really been realized, only the EGR system with a certain EGR rate is configured for the engine being developed based on the experience of the staff, whether the EGR rate is suitable for the engine b...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application solves the technical problem in the prior art that the EGR system that matches the engine cannot be quickly determined through simulation by providing an EGR rate prediction method, device, equipment, and medium, and realizes the rapid determination of the EGR system that matches the engine , to provide technical effects of guiding EGR system parameters for the engine test phase

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