# US 8,539,986 B2 · Hot gas conducting component

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- Number: US 8,539,986 B2
- Document ID: US8539986B2
- Status: Granted
- Kind: B2
- Application number: 13/274,319
- Filed: 2011-10-15
- Published: 2012-05-03
- Granted: 2013-09-24
- Earliest claimed: 2010-10-20
- Assignees: Isolite GmbH
- Applicants: Matthias Kroll; Armin Buchsteiner
- Inventors: Matthias Kroll; Armin Buchsteiner
- Web page: https://patentgrep.com/patent/US8539986B2

## CPC

- F01N 13/148: {Multiple layers of insulating material}
- F01N 13/102: {having thermal insulation}
- F16L 59/08: Means for preventing radiation, e.g. with metal foil
- F01N 2510/02: for thermal insulation
- Y10T 428/1393: Multilayer [continuous layer]
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A hot gas conducting component, in particular for an exhaust system of an internal combustion engine, is described. To improve the insulation effect, an insulation to which heat-reflecting and/or heat-absorbing pigments are added is arranged at the component.

## Claims

### Claim 1

Hot gas conducting component (1), in particular for an exhaust system of an internal combustion engine, with an insulation (3) arranged at the component (1) to which heat-reflecting and/or heat-absorbing color pigments are added;
wherein the insulation is present as an insulating molded body (3) solidified by binder;
wherein the color pigments are added to the binder; and
wherein the heat-absorbing color pigments comprise black color pigments comprising a copper chromite black spinell and the heat-reflecting color pigments comprise yellow color pigments comprising a buff rutile on the basis of chrome, antimony and titanium.

### Claim 2 (depends on 1)

Hot gas conducting component according to claim 1, wherein:
the pigments are color pigments.

### Claim 3 (depends on 1)

Component according to claim 1, wherein the insulation is a fiber mat of mineral fibers, such as glass and/or silicate and/or ceramic fibers.

### Claim 4 (depends on 1)

Component according to claim 1, wherein the insulation is a nonwoven fibrous tissue.

### Claim 5 (depends on 1)

Component according to claim 1, wherein the insulation is a woven fibrous tissue.

### Claim 6 (depends on 1)

Component according to claim 1, wherein the pigments are located on the inner and/or outer surface of the insulation.

### Claim 7 (depends on 1)

Insulating molded body (3), in particular for a hot gas conducting component (1) of an internal combustion engine according to claim 1, having an insulating mat which is mixed with a binder and contains the added color pigments.

### Claim 8 (depends on 7)

Method of manufacturing an insulating molded body according to claim 7, wherein a blank of a fiber mat is provided with a binder mixed with the color pigments and reshaped by hot pressing.

### Claim 9

A hot gas conducting component for an exhaust system of an internal combustion engine comprising:
insulation applied to the hot gas conducting component; and
a heat reflecting and/or heat absorbing color pigment added to said insulation,
whereby a thermally effective insulation is provided;
wherein the insulation is present as an insulating molded body solidified by binder;
wherein the color pigments are added to the binder; and
wherein the heat-absorbing color pigments comprise black color pigments comprising a copper chromite black spinell and the heat-reflecting color pigments comprise yellow color pigments comprising a buff rutile on the basis of chrome, antimony and titanium.

### Claim 10 (depends on 9)

A hot gas conducting component for an exhaust system of an internal combustion engine as in claim 9 wherein:
said heat reflecting and/or heat absorbing color pigment is on the surface of the hot gas conducting component.

### Claim 11 (depends on 1)

Hot gas conducting component according to claim 1, wherein:
the black color pigments are of the type Black 30C965 and the yellow color pigments are of the type YELLOW 193.

### Claim 12 (depends on 9)

A hot gas conducting component for an exhaust system of an internal combustion engine as in claim 9 wherein:
the black color pigments are of the type Black 30C965 and the yellow color pigments are of the type YELLOW 193.