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Methods of increasing accuracy of soot load estimates

A load and carbon particle technology, which is applied to the electronic control of exhaust gas treatment devices, diagnostic devices of exhaust gas treatment devices, machines/engines, etc. The effect of accuracy

Active Publication Date: 2013-06-19
CUMMINS FILTRATION IP INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, errors in the estimates can lead to failure modes such as runaway regeneration or reduced fuel economy

Method used

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  • Methods of increasing accuracy of soot load estimates
  • Methods of increasing accuracy of soot load estimates
  • Methods of increasing accuracy of soot load estimates

Examples

Experimental program
Comparison scheme
Effect test

1 example 100

[0034] Such as Figure 4 As shown, the method 100 includes comparing 110 the DPF inlet temperature to a target temperature, comparing 120 the DPF inlet volume flow rate to a desired volume flow rate during an operating regeneration. . Then, based on the comparison 110 and the comparison 120, the percentage of time during regeneration is calculated that: (1) the inlet temperature of the DPF reaches the target temperature; (2) the inlet volumetric flow rate of the DPF achieve the required volumetric flow rate. Then, it is determined 130 whether predetermined criteria are met.

[0035] The predetermined criterion is met if the calculated percentage is above a predetermined threshold and the model-based soot load estimate is below the predetermined threshold before the regeneration process is terminated. If predetermined criteria are met, then the regeneration process is determined to be healthy 140 . Otherwise, the regeneration process is determined to be unhealthy 150, and t...

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Abstract

A method for improving the effectiveness of filters by increasing accuracy of an estimate of particulate matter loading remaining in the filter after cleaning. In one embodiment, the disclosed method includes removing soot from the DPF by cleaning, and measuring parameters for a set of predetermined criteria. The amount of soot present in the DPF is then estimated based on delta pressure. The resulting estimated soot load value accounts for the noise factors such as ash loading after extended operation. The value is then used to adjust for future measurements of soot loading in the DPF after subsequent regeneration treatments and / or used to diagnose the effectiveness of the cleaning. The method can also be applied to diagnostics of the DPF. When discrepancies between DPSLE and model-based soot load estimate are observed in healthy regenerations, failure modes such as plugged filter, extreme ash loading or substrate melting can be detected.

Description

[0001] priority information [0002] This application is a PCT international application filed in the name of Cummins Filtration IP Co., Ltd., and requires the application number 12 / 138493, the filing date is June 13, 2008, and the title is "Method for Improving the Accuracy of Carbon Particle Load Estimation" The U.S. application of , which is the priority, is incorporated in this application in its entirety. technical field [0003] In general, the present invention relates to a method for analyzing measurement errors after cleaning a filter; more particularly, the present invention relates to a method for improving the accuracy of soot load estimation in a particulate filter. A revolutionary approach, the particulate filter is used for aftertreatment of diesel engine exhaust. Background technique [0004] Aftertreatment devices are well known and widely used in the aftertreatment of exhaust gases of various internal combustion engines. Such devices, such as diesel oxida...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/023F01N11/00F01N3/02
CPCF01N11/00Y02T10/47F01N9/002F01N2550/04Y02T10/40
Inventor 张月涛丹尼尔·D·威廉
Owner CUMMINS FILTRATION IP INC