Discoloration protection

Patent metadata

Field	Value
Publication number	US-9644523-B2
Application number	US-201514730638-A
Country	US
Kind code	B2
Filing date	Jun 4, 2015
Priority date	Jun 19, 2013
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A device is provided for protecting at least one metallic surface against discolorations under the action of heat. The device includes a metallic surface with a lacquer applied a lacquer applied thereto to the metallic surfaces and then stoving the metallic surface while sealing the metallic surface against oxygen contact to form a permanently effective oxygen barrier.

First claim

What is claimed is:

1. A device for discharging exhaust gases and waste heat of an internal combustion engine of a vehicle, the device comprising: a covering for an engine space in which the internal combustion engine is arranged; at least one exhaust tract branching off from the internal combustion engine and connected from the internal combustion engine upward to the covering over substantially a shortest possible distance so that the exhaust gases are dischargeable into surroundings of the vehicle via the covering, wherein the covering has a first surface on a first metallic material above the internal combustion engine and a second surface on a second metallic material disposed above the first metallic material, at least part of the first metallic material being substantially impermeable to air and moisture and at least parts of the second metallic material being formed with a plurality of openings therethrough for permitting an upward flow of heat away from the engine, a lacquer applied to the first and second metallic surfaces and sealing the first and second metallic surface against oxygen contact and the sealed metallic surface with the lacquer thereon being stoved to form a permanently effective oxygen barrier that prevents the first and second metallic materials from discoloring when exposed to the exhaust gas and the heat of the internal combustion engine.

2. The device of claim 1 , wherein the lacquer is a clear lacquer stoved at a stoving temperature of 450° C.

3. The device of claim 2 , wherein the clear lacquer is a NANO-X clear lacquer with an oxygen barrier.

4. A vehicle comprising:
an internal combustion engine that produces a heated exhaust gas;
an exhaust system component that accommodates a flow of the heated exhaust gas from the internal combustion engine and directs the heated exhaust gas from the vehicle in a direction up and away from a road on which the vehicle is disposed;
a covering disposed at least partially above the internal combustion engine and the exhaust system component and being integrated into an outer body area of the vehicle, the covering having a first surface on a first metallic material above the internal combustion engine and a second surface on a second metallic material disposed above the first metallic material, at least part of the first metallic material being substantially impermeable to air and moisture and at least parts of the second metallic material being formed with a plurality of openings therethrough for permitting an upward flow of the heated exhaust gas away from the engine having an array of orifices therethrough that permit the heated exhaust gas and heat from the internal combustion engine to flow up and escape from the vehicle through the orifices and into ambient surroundings, the covering having a clear lacquer applied to the first and second metallic surfaces, the clear lacquer having an oxygen barrier therein for sealing the first and second metallic surface from oxygen contact thereby forming a permanently effective oxygen barrier that prevents the first and second metallic surfaces from discoloring when exposed to the heated exhaust gas and the heat of the internal combustion engine.

5. The vehicle of claim 4 , wherein the exhaust system component extends along substantially a shortest possible distance from the internal combustion engine to the covering.

Assignees

• Porsche Ag
• Porsche Ag

Inventors

• Haunstetter Frank

Classifications

• B05D7/14

  to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23) · CPC title

• F01N13/16 Primary

  Selection of particular materials · CPC title

• C25D9/04 Primary

  with inorganic materials · CPC title

• F01N3/055

  without contact between air and exhaust gases · CPC title

• C25D11/38

  Chromatising · CPC title