Sectional type filter element and engine particle catcher thereof

Abstract

The invention discloses a sectional type filter element and an engine particle catcher thereof. The sectional type filter element comprises a first filter element body and a second filter element body, which have different catching efficiency as well as a turbulent-flow interval layer which is formed between the first filter element body and the second filter element body. Compared with a pure cordierite material wall-flow type filter element, the sectional type filter element can effectively reduce gas exhaust pressure drop, and improves fuel oil economical efficiency; compared with a pure metal foam material filter element, the sectional type filter element can effectively improve particle catching efficiency; and the turbulent-flow interval layer is arranged between the two sections ofthe filter element bodies, so that particles are in turbulent-flow motion in the turbulent-flow interval layer, and therefore, motion track of the particles generates relatively great fluctuation, particle catching efficiency is improved, and the purpose of reducing back pressure by improving catching efficiency is achieved.

Description

technical field [0001] The invention relates to the technical field of engine exhaust gas purification, in particular to a segmented filter element and an engine particle trap. Background technique [0002] Particulate filter is the main equipment used to filter particulate matter in the engine exhaust system, which can effectively reduce the emission of particulate pollutants and reduce the pollution of automobile exhaust to the atmospheric environment. [0003] An important parameter of the engine exhaust system is the exhaust back pressure. With the increase of the exhaust back pressure, the flow resistance of the exhaust gas will also increase, resulting in an increase in the power consumption during the exhaust exhaust process, and the combustion efficiency, power and There will be a certain drop in fuel economy. [0004] The working principle of the particulate filter determines that it will definitely lead to an increase in exhaust back pressure. Therefore, particul...

AI Technical Summary

Problems solved by technology

[0005] According to relevant experimental data, compared with the traditional cordierite wall-flow particulate filter element, due to the larger average pore size and porosity of the metal foam filter element, it can effectively reduce the exhaust back pressure of the engine and increase the combustion efficiency. Efficiency, power and reduced fuel economy, etc., the disadvantage is that the capture efficiency of particulate matter is relatively reduced

[0006] An important index to measure the performance of the engine particulate filter is the particle capture efficiency. A large number of practical data show that the traditional cordierite wall-flow particulate filter element has a very small porous media pore size and low permeability. It can achieve excellent particle capture efficiency, but its disadvantage is that it will greatly increase the exhaust back pressure of the engine, resulting in a decrease in vehicle performance

Images