A diesel engine exhaust purification treatment device and method

Abstract

The invention discloses a diesel engine exhaust purification treatment device and method, comprising a catalytic conversion section housing, a catalytic oxidant carrier, a purification and muffler section housing, a particle filter core, a resonance cavity, a perforated intake pipe, an exhaust collection pipe, and an ECU The control system, inlet and outlet pressure sensors, and fuel injectors can integrate the catalytic conversion of exhaust gas, particle capture and noise reduction functions into one, and the radial flow filter element is used to achieve particle capture, which is beneficial to reduce filter resistance; Under normal working conditions of the diesel engine, through the structural combination of catalytic oxidation and particulate capture, particulate capture and regeneration are carried out simultaneously to achieve continuous regeneration; under long-term low-load operating conditions, the fuel injection auxiliary system is activated to still ensure particulate capture and regeneration. Normal operation of regeneration function. The design of perforated intake pipe, resonant cavity, and porous ceramic noise reduction function can effectively eliminate low and intermediate frequency noise. The device has the advantages of compact structure, high particulate capture efficiency, safe and reliable regeneration process, etc.

Description

technical field [0001] The present invention mainly relates to the aftertreatment of diesel engine exhaust, including the purification of harmful gases in exhaust gas, the capture of particulate matter and the control of noise, and specifically relates to a method that can combine the capture of diesel engine exhaust particulates with the functions of noise reduction and noise reduction, and The utility model relates to a treatment device capable of continuously regenerating particles while capturing particles, and belongs to the technical field of exhaust gas purification and noise reduction of diesel engines. Background technique [0002] Harmful gas and particulate emissions in diesel engine exhaust and exhaust noise have brought serious environmental pollution problems and endangered human health. Exhaust after-treatment technology has always been a research hotspot in the field of motor vehicle emission control technology. In the prior art, the exhaust gas treatment and...

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Problems solved by technology

[0003] The present invention overcomes the defects that the exhaust gas purification and noise reduction devices in the existing engine exhaust post-treatment system are separately installed, resulting in complex system structure and many technical obstacles in particle capture and regeneration. Through the structure designed in the present invention, the The functions of catalytic conversion of exhaust gas, noise reduction of exhaust gas and particulate matter capture and regeneration are effectively combined, and the technical effect of continuous regeneration can be realized

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