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Diesel particulate filter (DPF) air supplement regeneration system and method based on braking energy recovery

A regeneration system, DPF technology, applied in exhaust treatment, exhaust devices, engine components, etc., can solve the problem of large energy ratio, achieve high-efficiency DPF regeneration, solve the problem of air source, ensure economy and emission. Effect

Pending Publication Date: 2018-10-19
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In addition, according to research at home and abroad, for vehicles operating in urban conditions, the energy of engine braking accounts for a large proportion

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  • Diesel particulate filter (DPF) air supplement regeneration system and method based on braking energy recovery

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Embodiment Construction

[0021] Specific examples of the present invention are given below. The specific embodiments are only used to further describe the present invention in detail, and do not limit the protection scope of the claims of the present application.

[0022] The present invention provides a DPF supplementary air regeneration system based on braking energy recovery (see figure 1 , system for short), including intake system, exhaust aftertreatment device, temperature sensor 111 after DOC, temperature sensor 113 after DPF, oxygen sensor 116 after ASC and diesel injector 129; the intake system includes intercooler 101, Air filter 102 and turbocharger 104; the exhaust aftertreatment device includes DOC110, DPF112, SCR114, ASC115 and ammonia solution injector 117; the outlet of DOC110 is connected to the post-DOC temperature sensor 111, and the outlet of DPF112 is connected to the post-DPF temperature sensor 113, its temperature feedback signal is used for the opening and closing of the suppl...

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Abstract

The invention discloses a diesel particulate filter (DPF) air supplement regeneration system and method based on braking energy recovery. The DPF air supplement regeneration system comprises an engineelectronic control unit, a braking energy recovery device and a DPF air supplement regeneration device. The DPF air supplement regeneration method comprises the steps that in the deceleration fuel cutoff and braking processes, an electrically-controlled exhaust pipe butterfly valve and an electrically-controlled compressed air inflatable valve of the braking energy recovery device are controlledso that the braking energy recovery device can start the recovery process in time and stop the recovery process at the proper moment in the braking process; when the DPF regeneration condition is met,the DPF air supplement regeneration device is started, and the supplying mode and the supplying time of supplemented air are accurately judged according to gas pressure in a compressed air bottle; and according to the exhaust condition, the ejecting moment and the pulse width of a DPF regeneration diesel ejector are controlled.

Description

technical field [0001] The invention relates to the field of diesel engines, in particular to a DPF supplementary air regeneration system and a supplemental air regeneration method based on braking energy recovery. Background technique [0002] In order to meet the emission limits of strict emission regulations, diesel engines generally need to be equipped with diesel particulate filters (Diesel Particulate Filter, DPF) to reduce soot emissions. However, after the diesel engine runs for a long time, the soot particles produced will be deposited in the DPF, which will hinder the smooth exhaust of the engine and increase the fuel consumption of the engine. affect the emission performance of the engine. Therefore, it is necessary to regenerate the DPF in a timely and efficient manner during engine operation. At present, a commonly used DPF regeneration method is the DOC-assisted DPF regeneration method, that is, when the DPF needs to be regenerated, an appropriate amount of d...

Claims

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Application Information

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IPC IPC(8): F01N3/023F01N9/00
CPCF01N3/023F01N9/002Y02T10/40
Inventor 李孟涵田洪建刘晓日刘鑫郑清平辛固
Owner HEBEI UNIV OF TECH
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