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Exhaust gas purifying apparatus, exhaust gas purifying method, and particulate matter measuring method

An exhaust purification device, particulate matter technology, applied in the field of particulate matter measurement of particulate matter, capable of solving problems such as reduced fuel efficiency, engine damage, overpressure, etc.

Inactive Publication Date: 2008-04-23
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, exhaust gas purifying method, and particulate matter measuring method
  • Exhaust gas purifying apparatus, exhaust gas purifying method, and particulate matter measuring method
  • Exhaust gas purifying apparatus, exhaust gas purifying method, and particulate matter measuring method

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no. 1 approach

[0107] FIG. 6 shows the configuration of the exhaust purification device 20 according to the first embodiment of the present invention.

[0108] Referring to Figure 6, exhaust gas from a diesel engine not shown flows via exhaust line 21 into a main diesel particulate filter (DPF) 22 similar to that previously explained with reference to Figure 2A, and as explained with reference to Figures 2C and 2D Yes, the main diesel particulate filter (DPF) 22 collects particulate matter from the exhaust.

[0109] 6, on 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 that of the main diesel particulate filter is provided for the auxiliary exhaust line 21A. The secondary diesel particulate filter 22A of the filter (DPF). In addition, a differential pressure gauge 22B is provided for measuring the differential pressure ΔP caused between the inlet and outlet of the sub diesel part...

no. 2 approach

[0141] FIG. 10 shows a flowchart of an exhaust purification method using the exhaust purification device of FIG. 6 according to a second embodiment of the present invention.

[0142] 10, in step 1, the exhaust gas flow rate Q is detected by the flow meter 24, and the differential pressure ΔP across the sub diesel particulate filter 22A is detected by the differential pressure gauge 22B. In addition, the temperature of the exhaust gas is detected by the temperature measuring portion T1.

[0143]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 measuring section T2 of the main diesel particulate filter (DPF) 22 instead of using the temperature measuring section T1 of the sub diesel particulate filter 22A as in the pres...

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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 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 (22B) measuring a differential pressure between an inlet and an outlet of the secondary diesel particulate filter (22A).

Description

technical field [0001] The present invention generally relates to an exhaust gas purification device of an internal combustion engine, an exhaust gas purification method, and a particulate matter measurement method, and more particularly to a method for removing particulate matter ( PM) exhaust purification device and method thereof, and a particulate matter measurement method for particulate matter (PM) included 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/021F01N3/023
CPCG01N15/0618F01N3/0222F01N9/002F01N2560/05F01N2560/08F01N2560/06F01N13/04F01N3/027Y02T10/47F01N2550/04F02D2200/0812F01N2560/07F01N13/011Y02T10/40B01D53/92B01D53/02
Inventor 阿萨纳西奥斯·G·坎斯坦多普罗斯
Owner IBIDEN CO LTD
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