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Exhaust gas purifying apparatus

An exhaust purification device and exhaust pipeline technology, applied in the direction of the exhaust device, the electronic control of the exhaust treatment device, the diagnosis device of the exhaust treatment device, etc., can solve the problems of overpressure, fuel efficiency reduction, engine damage, etc.

Inactive Publication Date: 2009-10-14
IBIDEN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this particulate matter deposit is ignored, the exhaust can cause overpressure in the diesel particulate filter, which can lead to reduced fuel efficiency or damage to the engine

Method used

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  • Exhaust gas purifying apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0081] Image 6 The configuration of the exhaust purification device 20 according to the first embodiment of the present invention is shown.

[0082] refer to Image 6 , allowing exhaust gas from a diesel engine not shown to flow in via exhaust line 21 as previously referred to Figure 2A A similar primary diesel particulate filter (DPF) 22 as described, and as referenced Figure 2C and 2D As illustrated, a primary diesel particulate filter (DPF) 22 collects particulate matter in the exhaust.

[0083] Additionally, for Image 6 Composition, from the upstream side of the main diesel particulate filter (DPF) 22, the auxiliary exhaust line 21A is branched from the exhaust line 21, and a volume smaller than the main diesel particulate filter (DPF) is set for the auxiliary exhaust line 21A ) of the secondary diesel particulate filter 22A. In addition, a differential pressure gauge 22B is provided for measuring the differential pressure ΔP caused between the inlet and outlet o...

no. 2 approach

[0117] Figure 10 shows the use according to a second embodiment of the invention Image 6 A flow chart of the exhaust purification method of the exhaust purification device.

[0118] refer to Figure 10 , in step 1, the flow rate in the secondary exhaust line 21A is set to a predetermined value in the range of 50 to 6000 ml / min by using the flow meter 24 (or in some cases using the valve 23), and the flow rate is determined by the differential pressure gauge 22B. The differential pressure ΔP across the sub diesel particulate filter 22A is detected. In addition, the temperature of the exhaust gas is detected by the temperature measuring portion T1.

[0119] Next, in step 2, the layer thickness W of the particulate matter collected by the sub diesel particulate filter 22A is obtained from the differential pressure ΔP detected in step 1 according to the formula (1). It should be noted here that the temperature T of the exhaust gas can be obtained using the temperature measur...

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Abstract

An exhaust gas purifying apparatus comprises a primary diesel particulate filter (22) provided in an exhaust line (21) of a diesel engine, a secondary exhaust line (21A) branched from the exhaust line (21) from an upstream side of the primary diesel particulate filter (22), a secondary diesel particulate filter (22A) provided in the secondary exhaust line (21A), the secondary diesel particulate filter (22A) having a soot storage capacity smaller than the soot storage capacity of the primary diesel particulate filter (22), and a differential pressure measuring part measuring a differential pressure between an inlet and an outlet of the secondary diesel particulate filter (22A), wherein a distance to said secondary diesel particulate filter (22A) from a branching point of said secondary exhaust line (21A) from said primary exhaust line (21) is 2m or less.

Description

technical field [0001] The present invention generally relates to an exhaust purification device of an internal combustion engine, and more particularly, to an exhaust purification device including a diesel particulate filter (DPF) for removing particulate matter (PM) contained in exhaust gas of a diesel engine. Background technique [0002] Generally, a diesel particulate filter made of porous ceramics is used to collect particulate matter mainly composed of C (carbon) emitted from a diesel engine. For this kind of diesel particulate filter, as it continues to be used, there will be a gradual deposition of particulate matter. Therefore, in the prior art of exhaust purification devices using diesel particulate filters, it is actually through the The combustion process is periodically initiated within the DPF and the DPF is regenerated to remove deposited particulate matter. If this particulate matter deposit is ignored, the exhaust gas can cause overpressure in the diesel p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/021F01N3/023F01N13/00
CPCF01N9/002F01N2560/07F01N3/027F01N3/0222F01N2340/02F01N13/011F01N13/04F01N11/002Y02T10/47F01N13/008F01N2560/05G01N15/0618F01N3/023Y02T10/40F01N3/021F01N13/08
Inventor 阿萨纳西奥斯·G·坎斯坦多普罗斯
Owner IBIDEN CO LTD
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