Testing system for post-processing device of engine

Abstract

The invention relates to a testing system for a post-processing device of an engine. The testing system is characterized in that a compressor provides high-pressure air for an air seperation machine, and O2 and N2 from the air seperation machine respectively enter into an O2 voltage stabilizing air tank and an N2 voltage stabilizing air tank; the fluxes of high pressure gas cylinder groups containing various exhaust gas components are controlled by using a mass flowmeter; the various exhaust gas components are mixed with O2 and N2 in a mixing cavity to form a gas with different proportions ofcomponents so as to simulate the exhaust gas of the engine; the mixed gas is heated to a set experimental temperature; the heated gas enters a main body section for testing a carrier in the post-processing device; the pressure drop of the main body section is measured by using a differential pressure transducer; the change of an internal temperature field of the main body section is measured through a temperature sensor; and the collection and control of signals of the testing system are finished through a data acquisition card and a microcomputer. The testing system can be used for testing the carrier by accurately simulating exhaust gases of working conditions of the engine and has the characteristics of convenient testing and good repeatability of test results.

Description

technical field [0001] The invention belongs to an engine exhaust gas post-processing test device, and in particular relates to a test system for simulating exhaust gas in various working conditions of an engine and using a carrier of an engine post-processing device to process the exhaust gas. Background technique [0002] At present, energy saving and emission reduction has become a hot topic in the world, and automobiles are large energy consumers. Therefore, it is imperative to realize energy saving and emission reduction of automobiles. Various advanced engine technologies are applied to automobiles to reduce their fuel consumption rate and pollutant emissions; but only relying on in-cylinder combustion to achieve engine energy saving and emission reduction can no longer fully meet the requirements of increasingly stringent emission regulations, especially for The control of its exhaust gas pollutants will gradually depend on the engine's post-treatment technology. Eng...

AI Technical Summary

Problems solved by technology

These post-processing devices usually need to be installed on the engine bench or the whole vehicle for testing when performing performance testing and development. The test workload is large and requires a lot of manpower and material resources; During the test, its huge workload and experimental cost will bring great difficulties to the performance test and development of the post-processing device

Images