EP0091771A2
Expired / Lapsed
EP
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Muffler and method for retarding corrosion in mufflers
Assignee: Union Carbide Corp
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Filing: 1983-04-05
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Granted: —
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Expires: 2003-04-05
Abstract
Abstract There is disclosed a non-catalytic method for extending the life of the metal parts of an automobile muffler which comprises placing an adsorbent mass, preferably of crystalline zeolitic molecular sieve, in the internal space thereof, in sufficient amount to prevent condensation of water vapour from the engine exhaust gases on the walls thereof after engine shutdown. This procedure significantly inhibits corrosion of the metal parts.
Inventors
- 👤 Walter Paul Fethke
- 👤 Stephen Robert Dunne
- 👤 Joseph Paul Ausikaitis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 21:34
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/16; B; B01; B01D; B01D53/00; B01D53/02; C; C23; C23F; C23F15/00; F01N3/00; F01N3/08; F01N2230/00; F01N2240/00; F01N2240/18; F01N2370/00; F01N2370/22; F01N2370/24; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
Method for inhibiting the corrosion of metal parts of a muffler used in conjunction with an internal combustion engine characterised by inserting in the internal space of said muffler an adsorbent mass selected from the group consisting of crystalline zeolitic molecular sieves and activated alumina, said adsorbent mass being in contact with any gases entering said muffler from the internal combustion engine and the ambient atmosphere.
Claim 2
Dependent Claim
66 words
Method for inhibiting the corrosion of metal parts of a muffler used in conjunction with an internal combustion engine characterised by inserting in the internal space of said muffler an adsorbent mass selected from the group consisting of crystalline zeolitic molecular sieves and activated alumina, said adsorbent mass being in contact with any gases entering said muffler from the internal combustion engine and the ambient atmosphere.
Claim 3
Dependent Claim
32 words
Method according to claim 1, characterised in that the adsorbent is employed in an amount of from about 2 to about 13 grams per 1,000 cubic inches of internal muffler void space.
Claim 4
Dependent Claim
18 words
Method according to claim 1 or 2, characterised in that the adsorbent comprises a crystalline zeolitic molecular sieve.
Claim 5
Dependent Claim
69 words
Method according to claim 3, characterised in that the adsorbent comprises a crystalline zeolite having a pore diameter of at least 3.2 Angstroms, a Si0 2 /Al 2 O 3 molar ratio of from 4 to 20 and having a water adsorptive capacity at 100°C and a water vapour pressure of 80 mm Hg of at least 4 weight per cent based on the anhydrous weight of the zeolite.
Claim 6
Dependent Claim
15 words
Method according to claim 4, characterised in that the zeolite has the mordenite crystal structure.
Claim 7
Dependent Claim
16 words
Method according to claim 4, characterised in that the zeolite has the zeolite Y crystal structure.
Claim 8
Dependent Claim
16 words
Method according to claim 4, characterised in that the zeolite has the crystal structure of chabazite.
Claim 9
Dependent Claim
63 words
A muffler (silencer) for use in conjunction with an internal combustion engine, characterised in that the internal space includes an adsorbent mass selected from the group consisting of crystalline zeolite molecular sieves, and actuated alumina, said adsorbent mass being arranged such that in operation, it is in contact with any gases entering said muffler from the internal combustion engine and the ambient temperature.
Claim 10
Dependent Claim
63 words
A muffler (silencer) for use in conjunction with an internal combustion engine, characterised in that the internal space includes an adsorbent mass selected from the group consisting of crystalline zeolite molecular sieves, and actuated alumina, said adsorbent mass being arranged such that in operation, it is in contact with any gases entering said muffler from the internal combustion engine and the ambient temperature.
References Cited (Backward Citations)
No citation records indexed.
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