After treatment device of exhaust system for vehicle

Patent metadata

Field	Value
Publication number	US-10113470-B2
Application number	US-201615273063-A
Country	US
Kind code	B2
Filing date	Sep 22, 2016
Priority date	Oct 28, 2015
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

Disclosed herein is an after treatment device of an exhaust system for a vehicle. The after treatment device of an exhaust system for a vehicle is connected to an exhaust pipe and includes a canning main body in which a catalyst is received and may include a heat insulation coating layer formed on an inner wall surface of the canning main body.

First claim

What is claimed is:

1. An after treatment device of an exhaust system for a vehicle connected to an exhaust pipe and including a canning main body in which a catalyst is received, comprising:
a heat insulation coating layer formed on an inner wall surface of the canning main body,
wherein the canning main body encloses an outer side surface of a catalyst support member that supports the catalyst and has the heat insulation coating layer formed on a corresponding inner wall surface thereof at a predetermined distance from the outer side surface of the catalyst support member,
wherein the heat insulation coating layer includes an inorganic binder that includes two or more silicon-based compounds and aerogel dispersed therein, such that the inorganic binder comprises 5 to 50 parts by weight of the aerogel for 100 parts by weight of the inorganic binder,
wherein the two or more silicon-based compounds are silanols and silicates with a weight ratio of 2 to 10, respectively,
wherein the inorganic binder exhibits a heat conductivity of 1.0 W/mK or less.

2. The after treatment device of claim 1 , wherein the heat insulation coating layer has a thickness of 10 μm to 2,000 μm.

3. The after treatment device of claim 1 , wherein the heat insulation coating layer has an adhesive strength of 5 kgf per unit area or less for metal.

4. The after treatment device of claim 1 , wherein the heat insulation coating layer has a melting point of 100° C. to 500° C.

5. The after treatment device of claim 1 , wherein the inorganic binder includes a sol-gel reactant of the two or more silicon-based compound.

6. The after treatment device of claim 1 , wherein the silicate includes a metal silicate salt.

7. The after treatment device of claim 1 , wherein the aerogel includes one or more compound selected from a group consisting of silicon oxide, carbon, polymer, and metal oxide.

8. The after treatment device of claim 1 , wherein the aerogel has a specific surface area of 100 cm 2 /g to 1,000 cm 2 /g.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Lee Seung Woo
• Baek Hong Kil
• Kim Bokyung
• Lyo In Woong
• Hong Woong Pyo

Classifications

• B01D2258/012

  Diesel engines and lean burn gasoline engines · CPC title

• F01N2510/02

  for thermal insulation · CPC title

• F01N13/14 Primary

  having thermal insulation {(exhaust manifolds F01N13/102)} · CPC title

• B01D53/94

  by catalytic processes · CPC title

• B01D53/9431

  Processes characterised by a specific device · CPC title