Testing method for judging consistency of original emission performance of engine

Abstract

Disclosed is a testing method for judging consistency of original emission performance of an engine. The testing method includes taking out exhaust gas directly from an engine exhaust pipe to perform an analytical test of exhaust pollutant samplings, and drawing an exhaust emission curve graph according to test data of sampling analysis 40 seconds before the test prior to determining an emission peak value T; and comparing a total amount of emission S, the Peak value T and an emission performance set value according to the total amount of the emission S calculated from the exhaust emission curve graph to judge the consistency of the original emission performances of the engine. Compared with emission tests of a whole vehicle hub-turning rack in the prior art, the testing method for judging the consistency of the original emission performance of the engine is simple and free of affects of factors of a post-processing system, electronic control unit data and personnel operating and the like when the whole vehicle is tested; the amount of the original emission of the engine data can be directly and objectively reflected, a production consistency of the engine can be measured and evaluated, and basis for controlling the production consistency of the engine can be provided.

Description

technical field [0001] The invention relates to an engine detection technology, in particular to a test method for judging the consistency of the engine's original emission performance, and belongs to the technical field of engines. Background technique [0002] With the continuous improvement of the level of science and technology, the automobile industry has developed rapidly, and the number of automobiles in the world has increased sharply in recent years. As a means of transportation, automobiles have entered thousands of households. While bringing people a comfortable life, the emission of automobile exhaust has become a serious social nuisance. In cities with dense automobiles, CO and HC in automobile exhaust gas are the main pollution sources of environmental pollution, which has caused a great negative impact on people's living environment. It not only endangers people's health, but also endangers the survival of animals and plants. destroy the ecological balance of...

AI Technical Summary

Problems solved by technology

In the vehicle test, factors such as after-processing system, electronic control unit data, and personnel operation all have a greater impact on the emission test data. The engine is tested and evaluated during the production stage, lagging behind the engine development process

Due to the lack of effective detection and evaluation methods for engine emissions at the current stage, the engine development cycle is prolonged in the engine design stage. In the engine production stage, it is not convenient to control the consistency of the original engine emissions, and then control the consistency of vehicle emissions

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