Over temperature / pressure safety device and method for diesel particulate filters

a safety device and filter technology, applied in the direction of machines/engines, mechanical equipment, transportation and packaging, etc., can solve the problems of affecting the integrity of the filter housing, the likelihood of over temperature or pressure conditions of etc., and achieve the effect of reducing the likelihood of over temperature or pressure conditions in the diesel particulate filter

Inactive Publication Date: 2014-11-13
BOSHART AUTOMOTIVE TESTING SERVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The system effectively reduces the likelihood of thermal runaway events and filter damage by rerouting exhaust flow and using a pressure relief mechanism to manage excessive pressures, ensuring the integrity of the filter and engine is maintained.

Problems solved by technology

In some configurations, the safety device desirably reduces the likelihood of diesel particulate filters (DPFs) from reaching a condition where the filter has become overloaded to the point that the particulate accumulated within the filter presents a potential over temperature condition that could damage the integrity of the substrate of the filter and the filter housing.

Method used

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  • Over temperature / pressure safety device and method for diesel particulate filters
  • Over temperature / pressure safety device and method for diesel particulate filters
  • Over temperature / pressure safety device and method for diesel particulate filters

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Embodiment Construction

[0027]FIG. 1 illustrates a safety device 100 for a diesel exhaust gas aftertreatment system 110. The illustrated safety device 100 desirably reduces the likelihood that a particulate overloading condition within a diesel particulate filter (DPF) 140 of a diesel exhaust gas aftertreatment system 110 may result in excessive temperatures and pressures that could damage the substrate of the particulate filter. In some configurations, the safety device 100 reduces the likelihood of damage to the DPF 140 by physically removing the DPF 140 from the exhaust stream in response to specific, predetermined conditions that are suspected of promoting auto-regeneration conditions, which may involve excessive heat and pressure. The safety device 100 may be used with any diesel exhaust aftertreatment system, including the system disclosed in U.S. Patent Publication No. 2011 / 0041478 A1, which is hereby incorporated by reference in its entirety.

[0028]In some configurations, the safety device 100 desir...

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Abstract

A safety device for an exhaust gas aftertreatment system provides an alternative exhaust route in case of high temperatures or pressures within the regenerating particulate filter of the exhaust gas aftertreatment system that may cause damage to the particulate filter. The safety device comprises a valve that redirects the flow of exhaust gas from the regenerating particulate filter when specified temperature or pressure thresholds are met or exceeded.

Description

INCORPORATION BY REFERENCE TO ANY PRIORITY APPLICATIONS[0001]Any and all applications for which a foreign or domestic priority claim is identified in the Application Data Sheet as filed with the present application are hereby incorporated by reference under 37 CFR 1.57.[0002]This application is a divisional application of U.S. patent application Ser. No. 13 / 659,823, filed on Oct. 24, 2012, which claims the benefit under 35 U.S.C. ยง119(e) of U.S. Provisional Patent Application No. 61 / 551,794, filed on Oct. 26, 2011, and U.S. Provisional Patent Application No. 61 / 594,158, filed on Feb. 2, 2012, which are hereby incorporated by reference in their entirety.BACKGROUND OF THE INVENTION[0003]1. Field of the Invention[0004]The present invention generally relates to exhaust gas aftertreatment devices and more particularly to safety devices and systems for exhaust gas aftertreatment devices.[0005]2. Description of the Related Art[0006]A diesel engine uses the heat of compression to initiate i...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): F01N3/021
CPCF01N3/021F01N11/002F01N3/031F01N2550/12F01N2900/1404F01N13/0097F01N13/0093F01N3/023F01N11/00F01N13/04F01N13/087F01N2410/02F01N2410/14F01N2560/06F01N2900/1406Y10T137/1624Y02T10/40
InventorBOSHART, KENNETH J.
OwnerBOSHART AUTOMOTIVE TESTING SERVICES INC