Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preventing formation of urea-based deposits and exhaust passage having coating

A technology for exhaust channels and deposits, which is applied in exhaust treatment, exhaust devices, machines/engines, etc., can solve problems such as shortcomings that have not been eliminated, and achieve the effects of saving materials, increasing service life, and improving effectiveness

Pending Publication Date: 2020-07-24
FORD GLOBAL TECH LLC
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages mentioned above about DE 11 2010 000 713 T5 were not eliminated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preventing formation of urea-based deposits and exhaust passage having coating
  • Method for preventing formation of urea-based deposits and exhaust passage having coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0059] figure 1 The sequence of the method for preventing the formation of urea-based deposits in the exhaust tract 1 of an internal combustion engine 2 is shown. In a first process step S1 , those regions of the exhaust duct 1 where there is a risk of forming urea-based deposits are identified. For example, this can be the area between the spraying device 7 and the SCR or SDPF catalytic converter 13 arranged downstream of the spraying device 7 . Since the spraying device 7 is used to introduce an aqueous urea solution into the exhaust gas 8, there is a risk that urea-based deposits will form in the region of the spraying device 7 and downstream of the spraying device 7, for example, water evaporates from the aqueous urea solution and Urea precipitates prior to urea deposition. The formation of urea-based deposits depends, inter alia, on the temperature of the exhaust gas 8 , the temperature of the exhaust duct 1 (eg the temperature of the pipes belonging to the exhaust duct...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for preventing the formation of urea-based deposits in an exhaust duct 1 of an internal combustion engine 2. The method comprises identifying a region (S1) of the exhaust duct 1 at risk of urea-based deposit formation, determining a degree of spatial resolution of the risk of urea-based deposit formation in the identified region (S2), and applying a coating 3 formed for catalytically decomposing an aqueous urea solution and / or urea-based deposits to the identified region (S3) according to the determined degree. Furthermore, an exhaust duct 1 for an internal combustion engine 2 has a coating 3, which is configured for catalytically decomposing urea-based deposits, in the region of the exhaust duct 1 at risk of urea-based deposit formation, the coating 3 having a varying layer thickness 4 and / or varying composition.

Description

technical field [0001] The invention relates to a method for preventing the formation of urea-based deposits in an exhaust tract of an internal combustion engine and to a coated exhaust tract for an internal combustion engine. Background technique [0002] A major challenge in the development of lean-burn engines and corresponding drive systems is the reduction of nitrogen oxide emissions in a substantially oxidizing environment under different operating conditions. [0003] The use of SCR (Selective Catalytic Reduction) exhaust gas aftertreatment devices is one of the important possibilities for removing nitrogen oxides from exhaust gases by catalytic conversion into non-toxic substances (ie nitrogen and oxygen) and thus reducing nitrogen oxide emissions. SCR technology is characterized by its robustness and the high conversion rates that can be achieved. In addition to pure SCR catalytic converters, particle filters with SCR coating, hereinafter referred to as SDPF cataly...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F01N3/20F01N13/08F01N13/16
CPCF01N3/2066F01N13/08F01N13/16F01N2570/14F01N2610/02
Inventor 简·哈尔姆森罗伯特·屋罗佩茨玛蒂娜·赖歇特玛丽亚·阿尔米恩多
Owner FORD GLOBAL TECH LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com