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Oxidation type catalyst-assisting regeneration system for diesel particulate filter (DPF)

A technology of oxidation catalytic converter and particle filter, which is applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve the problems of poor fuel economy, affecting engine life, and high cost of technical use, and achieve low cost effects

Inactive Publication Date: 2011-02-16
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to propose an oxidized catalyst assisting diesel particulate filter regeneration system to solve the technical problems of the traditional diesel particulate filter regeneration system, such as affecting engine life, poor fuel economy and high technical use cost.

Method used

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  • Oxidation type catalyst-assisting regeneration system for diesel particulate filter (DPF)
  • Oxidation type catalyst-assisting regeneration system for diesel particulate filter (DPF)

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Embodiment Construction

[0012] The diesel particulate matter filter regeneration system of the present invention is as figure 1 As shown, the whole system is composed of fuel injection system 1, control system 2, DOC3 (oxidation catalyst), DPF4, exhaust back pressure sensor 12 and exhaust temperature sensors 13,14. The fuel injection system 1 includes: a nozzle 5, an oil pressure sensor 6, a filter 7, an oil pump 8, a fuel tank 9, an oil inlet pipe 10 and an oil return pipe 11.

[0013] When the DPF4 is in the non-regenerating condition, the oil pump 8 generates a small circulating pressure (300kPa) for cooling the nozzle 5 . When DPF4 needs to be regenerated, the control system 2 judges the regeneration timing and the fuel injection timing according to the exhaust back pressure and the exhaust gas temperature before D0C3. Large cycle pressure (500kPa), nozzle 5 injects diesel oil in DOC3 upstream exhaust pipe 15, and the injected diesel oil and engine exhaust fully mix mist in straight pipe section...

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Abstract

The invention discloses an oxidation type catalyst-assisting regeneration system for a diesel particulate filter (DPF). The system consists of an oil injection system, a control system, an oxidation type catalyst, a diesel engine particles filter, an exhaust backpressure sensor and an exhaust temperature sensor. An atomization exhaust pipe composed of a section of straight pipe is connected between a nozzle and the oxidation type catalyst; the exhaust temperature sensor in front of the exhaust backpressure sensor and the oxidation type catalyst judges a regeneration time and an oil injection time; and when the regeneration time and the oil injection time both reach the pre-set fixed values and meet the oil injection and regeneration conditions, the control system starts an oil injection system so that an oil pump generates larger circulating pressure, the nozzle injects diesel oil into an upstream exhaust pipe of the oxidation type catalyst, and the injected diesel oil and the exhaust gas of an engine are sufficiently mixed and atomized in the straight pipe section. The oxidation type catalyst-assisting regeneration system for the DPF of the invention can solve the technical problems of the conventional diesel engine particles filter regeneration system that the service life of the engine is influenced, the economical efficiency of the diesel oil is low, the use cost of the technology is high, etc.

Description

technical field [0001] The present invention relates to a system for regeneration of a diesel particulate filter. Background technique [0002] PM (particulate matter) in diesel engine exhaust is one of the main pollutants emitted by diesel engines. DPF (diesel particulate filter) is considered to be the most effective and relatively mature device for reducing PM emissions, and the key to DPF technology The problem is DPF regeneration. [0003] Domestic and foreign regeneration methods mainly include the following: Catalytic regeneration, which can only be carried out when the exhaust temperature is high, and this technology generally requires the engine to use diesel with a sulfur content of less than 50ppm, which is relatively high in domestic diesel. , can not meet the requirements of this technology in the short term; electric heating regeneration generally requires a high-power on-board power supply, and at the same time faces problems such as uneven heating during reg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/025F01N9/00F01N3/035
CPCY02T10/47Y02T10/40
Inventor 鲍晓峰李凯张德满王猛周泽兴
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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