US4537167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine cylinder liners based on aluminum alloys and intermetallic compounds, and methods of obtaining them
Assignee: Cegedur Societe de Transformation de lAluminium Pechiney SA
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Filing: 1983-12-05
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Granted: 1985-08-27
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Expires: 2003-12-05
Abstract
Abstract The invention relates to cylinder liners for internal combustion engines comprising a matrix based on aluminum alloys of high mechanical strength, obtained by powder metallurgy, and methods of producing them. The liners comprise a dispersion of grains of an added intermetallic compound, apart from the dispersion of such intermetallic compounds as may exist in the alloy, the added compound having a melting temperature of over 700° C. The liners are obtained by extruding or sintering a mixture of powders. The liners of the invention may be used particularly in the automobile industry and in any kind of industry where liner-piston units of good compatibility must be obtained from aluminum alloys.
Inventors
- 👤 Michel Eudier
- 👤 Noel Huret
- 👤 Jean Meunier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/18; B; B22; B22F; B22F1/00; B22F1/09; B22F1/12; F02F7/00; F02F7/0085; F02F2007/009; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/4927; Y10T29/49272; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12021
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
80 words
Engine cylinder liners comprising: (1) a matrix comprising an aluminum alloy produced by powder metallurgy, said alloy being selected from the group consisting of A--S 12 UG alloys and series 7,000 alloys containing from 1 to 12% by weight added silicon, and (2) a dispersion of grains distributed within said matrix comprising at least one added intermetallic compound having a melting point of more than 700° C., said grains being distinct and not forming part of the actual alloy structure.
Claim 2
Dependent Claim
80 words
Engine cylinder liners comprising: (1) a matrix comprising an aluminum alloy produced by powder metallurgy, said alloy being selected from the group consisting of A--S 12 UG alloys and series 7,000 alloys containing from 1 to 12% by weight added silicon, and (2) a dispersion of grains distributed within said matrix comprising at least one added intermetallic compound having a melting point of more than 700° C., said grains being distinct and not forming part of the actual alloy structure.
Claim 3
Dependent Claim
13 words
The liners of claim 1, wherein the intermetallic compound is Ni 3 Sn.
Claim 4
Dependent Claim
23 words
The liners of claim 1, wherein the intermetallic compound is in the form of calibrated grains of dimensions from 5 to 50 μm.
Claim 5
Dependent Claim
21 words
The liners of claim 1, wherein the grains of intermetallic compound comprise 5 to 15% of the weight of the liner.
Claim 6
Dependent Claim
16 words
The liners of claim 1, wherein the grains of intermetallic compound comprise particles resulting from grinding.
Claim 7
Dependent Claim
20 words
The liners of claim 1, wherein the grains of intermetallic compound comprise particles resulting from solidification of an atomized liquid.
Claim 8
Dependent Claim
8 words
The liners of claim 1, additionally comprising graphite.
Claim 9
Dependent Claim
20 words
The liners of claim 7, wherein the amount of graphite in the liner is from 3 to 10% by weight.
Claim 10
Dependent Claim
97 words
In a method of producing engine cylinder liners, comprising: (1) converting an aluminum alloy from the liquid state to a powder of particle dimensions from 60 to 400 μm; (2) shaping said powder by cold compression; and (3) sintering said shaped powder in a controlled atmosphere, the improvement comprising mixing the powder prior to shaping with grains of an intermetallic compound having a grain size of 5 to 50 μm and a melting point of more than 700° C., the grains being added in such quantity that they comprise 5 to 15% by weight of the liners.
Claim 11
Dependent Claim
97 words
In a method of producing engine cylinder liners, comprising: (1) converting an aluminum alloy from the liquid state to a powder of particle dimensions from 60 to 400 μm; (2) shaping said powder by cold compression; and (3) sintering said shaped powder in a controlled atmosphere, the improvement comprising mixing the powder prior to shaping with grains of an intermetallic compound having a grain size of 5 to 50 μm and a melting point of more than 700° C., the grains being added in such quantity that they comprise 5 to 15% by weight of the liners.
Claim 12
Dependent Claim
119 words
In a method of producing engine cylinder liners, comprising: (1) converting an aluminum alloy from the liquid state to a powder of particle dimensions from 60 to 400 μm; (2) shaping by extruding said powder in a press selected from the group consisting of floating needle presses and bridge machinery presses, and; (3) trimming the extruded product obtained and cutting up said extruded product to the desired length, the improvement comprising mixing the powder prior to shaping with grains of an intermetallic compound having a grain size of 5 to 50 μm and a melting point of more than 700° C., the grains being added in such quantity that they comprise 5 to 15% by weight of the liners.
Claim 13
Dependent Claim
119 words
In a method of producing engine cylinder liners, comprising: (1) converting an aluminum alloy from the liquid state to a powder of particle dimensions from 60 to 400 μm; (2) shaping by extruding said powder in a press selected from the group consisting of floating needle presses and bridge machinery presses, and; (3) trimming the extruded product obtained and cutting up said extruded product to the desired length, the improvement comprising mixing the powder prior to shaping with grains of an intermetallic compound having a grain size of 5 to 50 μm and a melting point of more than 700° C., the grains being added in such quantity that they comprise 5 to 15% by weight of the liners.
Claim 14
Dependent Claim
28 words
The method of claim 10, wherein the extruded product is quenched on leaving the press, then subjected to a heat treatment, prior to being trimmed and cut up.
Claim 15
Dependent Claim
43 words
The method of claim 10, wherein the powder is initially compressed in the form of blanks, then subjected to backward extrusion to form a cup, the bottom and opposed edge of which are cut up to produce a liner which is subsequently machined.
Claim 16
Dependent Claim
21 words
The method of claim 12, wherein direct quenching of the cup is carried out after extrusion, prior to being cut up.
Claim 17
Dependent Claim
19 words
The method of claim 9, wherein 3 to 10% by weight of graphite powder is added to the mixture.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |