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Waste gas purifying system and method for determining regeneration termination

An exhaust gas purification system and a technology for determining devices, which are applied to chemical instruments and methods, separation methods, exhaust gas treatment, etc., can solve problems such as inability to accurately determine the termination of regeneration, and achieve the effect of avoiding deterioration of fuel economy and simple structure

Inactive Publication Date: 2004-09-29
MITSUBISHI FUSO TRUCK AND BUS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, even with this technique, correct regeneration termination determination cannot be made
Although the time is multiplied by the correction coefficient k in this technique, the termination time is basically determined based on the regeneration time Δt, so that the regeneration termination cannot be accurately determined

Method used

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  • Waste gas purifying system and method for determining regeneration termination
  • Waste gas purifying system and method for determining regeneration termination
  • Waste gas purifying system and method for determining regeneration termination

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Embodiment Construction

[0047] The exhaust gas purification system according to the embodiment of the present invention will be described below with reference to the accompanying drawings, wherein figure 1 It is a schematic diagram of the overall structure of the exhaust gas purification system. In this embodiment, the engine 2 is a diesel engine using diesel (HC) as fuel. The engine 2 is equipped with a common rail type fuel injection system in which fuel is stored in a high-pressure accumulator (common rail) 2a shared by a plurality of cylinders before being injected.

[0048] In the exhaust passage 4 of the engine 2, an oxidation catalyst (hereinafter simply referred to as "catalyst") 6 and a diesel particulate filter (hereinafter simply referred to as "filter") 8 are disposed in order from the upstream end of the exhaust gas flow. Furthermore, the turbocharger 3 is provided in the exhaust passage 4 , and the intercooler 5 is provided in the intake passage 7 .

[0049] Although not shown in deta...

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Abstract

An exhaust gas purification system includes an oxygen mass flow rate detecting unit for detecting or calculating a mass flow rate of oxygen fed to a filter and a regeneration end determining unit for determining a regeneration end of the filter in accordance with information provided from the oxygen mass flow rate detecting-unit and upon arrival of an integrated value of the oxygen mass flow rate at a predetermined value during regeneration of the filter.

Description

technical field [0001] The invention relates to an exhaust gas purification system and a regeneration termination determination method, which are particularly suitable for application in diesel engines. Background technique [0002] Hitherto, there has been known a technique in which an oxidation catalyst and a particulate filter (hereinafter simply referred to as "filter") are placed in an exhaust passage of a diesel engine so that particulate matter (PM) contained in exhaust gas is deposited on the filter on, and burn the PM thus deposited on the filter to continuously regenerate the filter. [0003] In the exhaust gas purification system constructed as above, NO contained in the exhaust gas is oxidized in the oxidation catalyst to generate NO 2 , followed by the NO 2 It reacts with PM on the filter, burns (oxidizes) PM and regenerates the filter continuously. Compared with NO, NO 2 Exhibits high efficacy as an oxidizing agent and enables oxidation of PM at relatively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/02B01D46/42B01D53/96F01N3/023F01N3/025F01N3/029F01N3/035F01N3/20F01N3/24F01N9/00F01N13/02F02B29/04F02B37/00F02D41/00F02D41/02F02D41/40
CPCF01N2610/03F02D41/402F02D41/0007Y02T10/123F02B29/0425F01N3/0231F01N2013/026Y02T10/47Y02T10/144F02B37/00F02D41/029Y02T10/44F01N9/002F01N3/035B01D53/96F02B2275/14F01N13/0097Y02T10/12Y02T10/40E04G3/00E04G5/04E04G5/06
Inventor 平沼智武田好央川谷圣百目木礼子
Owner MITSUBISHI FUSO TRUCK AND BUS CORPORATION
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