A kind of aftertreatment temperature control device and method for diesel engine-in-the-loop

Abstract

The invention provides a post-processing temperature control device and method for diesel engine-in-the-loop. The EIL can accurately simulate the engine running state under the operating condition of the whole vehicle on the engine bench, and the engine running speed and load can be inputted through The required vehicle speed, transmission ratio, transmission efficiency and other parameters are calculated, and the patented device can be used to simulate the situation that the post-processing system is blown by the wind during the driving process of the vehicle on the engine bench, and realize the post-processing system on the engine bench and the installation. The state of the vehicle is close, so that the evaluation of pollutants emitted by the whole vehicle can be carried out on the engine bench in the early stage of development. The invention creates the temperature control device and method, improves the accuracy of the EIL method for testing exhaust pollutants, and can use this method to control the exhaust gas temperature entering the after-treatment system of the whole vehicle on the bench. Combined with the EIL test system, it can be Evaluate vehicle emission levels in the early stages of development.

Description

technical field [0001] The invention belongs to the technical field of engine testing, and in particular relates to an after-treatment temperature control device and method for a diesel engine-in-the-loop. Background technique [0002] With the increase of motor vehicles in the market, the problems of energy consumption and environmental pollution have become increasingly prominent, and the state has also introduced more stringent regulations on fuel consumption and emission limits to prompt OEMs and car companies to speed up research on energy conservation and emission reduction. GB30510-2018 Fuel Consumption Limits for Heavy Commercial Vehicles", the fuel consumption of trucks with different design total masses is reduced by 11.5%-15.4% compared with the previous limit, and the four-stage fuel consumption to be promulgated immediately will require lower fuel consumption of the whole vehicle Therefore, it is very necessary to evaluate the fuel consumption and emission of ve...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention aims to propose a post-treatment temperature control device and method for diesel engines in the loop, to solve the problem that the exhaust pipeline and after-treatment system are not the same as the whole vehicle during the EIL bench test of the diesel engine. Under the real conditions of being blown by the ambient wind at different vehicle speeds, the aftertreatment parts will continue to maintain a high temperature after the engine runs under high-load transient conditions, so that the SCR has always been at a high conversion efficiency, resulting in the emission of the EIL test and the actual vehicle. The problem with large deviations in the test

Images