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Particulate matter detection sensor

A particulate matter, detection sensor technology, applied in instruments, membrane filters, machines/engines, etc., can solve problems such as overpressure, fuel efficiency reduction, engine damage, etc., to eliminate ash deposition and suppress fuel efficiency decline.

Inactive Publication Date: 2010-06-02
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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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0055] Figure 4 The configuration of the exhaust purification device according to the first embodiment of the present invention is shown.

[0056] refer to Figure 4 , 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.

[0057] Additionally, for Figure 4 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 measuring portion 22B is provided for measuring the differential pressure ΔP caused between the inlet ...

no. 2 approach

[0097] Figure 8 shows the use according to a second embodiment of the invention Figure 4 A flow chart of the exhaust purification method of the exhaust purification device.

[0098] refer to Figure 8 , in step S1, the exhaust gas flow rate Q is detected by using the flow meter 24, and the differential pressure ΔP across the sub diesel particulate filter 22A is detected by the differential pressure measuring portion 22B. In addition, the temperature of the exhaust gas is detected by the temperature measuring portion T1.

[0099] Next, in step S2, 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 S1 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 d...

no. 3 approach

[0114] Figure 10 is to illustrate the use according to the third embodiment of the invention Figure 4 A flow chart of the particulate matter measuring method of the particulate matter sensor of , wherein parts corresponding to those previously described are denoted by the same reference numerals, and descriptions thereof are omitted.

[0115] refer to Figure 10 , in step S21 corresponding to the above-mentioned step S1, using the flow meter 24, or using the valve 23 in some cases, setting the flow rate in the auxiliary exhaust line 21A to a predetermined value in the range of 50-6000ml / min, And the differential pressure ΔP across the sub diesel particulate filter 22A is detected by the differential pressure measuring portion 22B. In addition, the temperature of the exhaust gas is detected by the temperature measuring portion T1.

[0116] Next, in step S22 corresponding to step S2 described above, layer thickness W of particulate matter collected by sub DPF 22A is obtaine...

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Abstract

A particulate matter sensor includes a particulate matter detection filter having a volumetric soot storage capacity smaller than the volumetric soot storage capacity of a diesel particulate filter, and a differential pressure measuring part measuring a differential pressure between an inlet and an outlet of the particulate matter detection filter.

Description

technical field [0001] The present invention relates to a particulate matter sensor, and more particularly to a particulate matter sensor used in an exhaust purification device that includes a diesel particulate filter (DPF) and removes particulate matter (PM) contained in the 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): F01N3/02
CPCB01D2046/2496G01N15/0656B01D46/444B01D46/0063B01D46/2466B01D46/2418B01D46/2429B01D46/448F01N11/002Y02T10/47B01D46/247F01N9/002F01N2560/05B01D2279/30B01D46/446B01D46/2451Y02T10/40B01D46/2498B01D46/84F01N3/021F01N11/00
Inventor 阿萨纳西奥斯·G·坎斯坦多普罗斯
Owner IBIDEN CO LTD
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