US3744547A - Methods of manufacturing crank-case envelopes for rotary piston internal combustion engines with sintered metal plug support - Google Patents
Methods of manufacturing crank-case envelopes for rotary piston internal combustion engines with sintered metal plug support Download PDFInfo
- Publication number
- US3744547A US3744547A US00887973A US3744547DA US3744547A US 3744547 A US3744547 A US 3744547A US 00887973 A US00887973 A US 00887973A US 3744547D A US3744547D A US 3744547DA US 3744547 A US3744547 A US 3744547A
- Authority
- US
- United States
- Prior art keywords
- support
- envelope
- crank
- alloy
- sintered
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 42
- 238000002485 combustion reaction Methods 0.000 title description 8
- 238000004519 manufacturing process Methods 0.000 title description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 30
- 239000000956 alloy Substances 0.000 claims abstract description 30
- 238000001465 metallisation Methods 0.000 claims abstract description 22
- 239000004411 aluminium Substances 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011777 magnesium Substances 0.000 claims abstract description 13
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 13
- 229910000805 Pig iron Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000010409 thin film Substances 0.000 claims description 21
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- 238000007872 degassing Methods 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 5
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 9
- 238000005266 casting Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B55/00—Internal-combustion aspects of rotary pistons; Outer members for co-operation with rotary pistons
- F02B55/08—Outer members for co-operation with rotary pistons; Casings
Definitions
- ABSTRACT The envelope is of cast metal or alloy in which each spark-plug is mounted in a support, preferably externally cylindrical, of a sintered metal or alloy highly resistant to thermal shocks.
- the support is degassed in vaccum and coated by metallisation with the metal or alloy constituting the envelope. It is then placed as a core in a mould and the metal or alloy of the envelope is cast around it, so affecting a positive and durable bond between the support and the rest of the envelope.
- the envelope is of aluminimum magesium alloy or pig iron and the support of sintered aluminium, magnesium or nickel including 7 to 8 percent thoria respectively.
- crank-case envelopes for rotary piston internal combustion engines relate to improvements in methods for their manufacture. More particularly it relates to, on the one hand, methods of manufacturing crank-case envelopes, for rotary piston internal combustion engines, of the type constituted of cast metal or alloy and of which the or each plug is mounted in a support fixed in the envelope and, on the other hand, to these envelopes themselves; and it relates more especially, because it is in this case that its application seems to be most advantageous, but not exclusively, to crank-case envelopes for automobile vehicles.
- a process of manufacturing rotary piston internal combustion engine crank-cases constituted of cast metal or alloy and of which the or each plug is mounted in a support fixed in the envelope, wherein the plug support is constituted by a body, preferably externally cylindrical, of sintered metal or alloy resisting well thermal shocks, placing it in a mould, as a core, and casting around it the metal or alloy having to constitute the said envelope, due to which positive and lasting bonding is effected between the support and the remainder of the envelope.
- the plug support is subjected to degassing under vacuum and it is plated, by metallisation, with a thin film of a metal miscible with the metal or alloy having to constitute the said envelope.
- the degassing under vacuum is effected, advantageously, under a pressure of the order of millibars (or 10" pascal).
- a rotary piston internal combustion engine crankcasing constituted of a cast metal or alloy of which the or each plug is mounted in a support fixed in the envelope, is characterised in that the or each plug support is constituted by a body of sintered metal or alloy, said support being included by a casting method.
- crank-casing is formed of an aluminium alloy and the plug support is made essentially of sintered aluminium and it is coated, by metallisation, with a thin film of aluminium or of copper.
- the invention consists of certain other features which are used preferably at the same time and of which a more explicit description will be given below.
- the plug support is constituted by a body 2, preferably externally cylindrical, of a sintered metal or alloy resisting thermal shocks well, it being placed in a mould (not shown) as a core, and there is cast around it the metal or alloy which has to constitute the said envelope
- the crank-case envelope is generally given a cylindrical shape of which the inner surface 3 permits as a cross-section a two-lobed trochoid which can cooperate with a rotary piston (not shown) with three crests.
- the envelope 1 before casting the envelope 1 around the support 2, the latter is subjected to degassing under vacuum, under a pressure of the order of 10 millibar (or 10 pascal) and it is coated by metallisation, under vacuum or not, with a thin film of a metal miscible with the metal or alloy which has to constitute the said envelope.
- the crank-case envelope 1 is made of aluminium or of aluminium alloy and the support 2 substantially of sintered aluminium, coated, by metallisation, with a thin film of aluminium or of copper.
- the sintered aluminium constituting the support 2 may comprise from 5 to 15 percent of alumina and be made especially by a method described in the journal Technica No. 23, 1960, of Zurich by Dr. R. AKERET. According to this method, aluminium powder, of which the apparent density exceeds 1 g/cm, is converted into a semi-finished product by compression in the cold, then heated, sintered hot and subjected to hot plastic forming.
- the crank-case envelope 1 may also be constituted of a magnesium alloy, and the support 2 substantially of sintered magnesium, plated, by metallisation, with a thin film of magnesium or of aluminium facilitating the subsequent attachment of the support 2 on the cast metal of the envelope 1.
- the support 2 may, if necessary, be constituted of a sintered mixture of magnesium and of magnesia.
- the envelope of the crank-casing may be manufactured of a ferrous alloy, for example, of grey pig iron or with spheroidal graphite, and the support 2 of a composite sintered material.
- nickel comprising 7 to 8 percent of thoria
- the support 2 is coated, by metallisation, with a thin film of copper so as to ensure a positive bonding between the ferrous alloy of the envelope and the support 2.
- copper-alumina and copper-nickelalumina are also chosen.
- Suitable dimensions are given to the support 2 for the functions which it must perform and, before the casting of the crank-case envelope 1, it is placed at the desired spot in the mould.
- said method comprising:
- Method according to claim 1 including subjecting the plug support, prior to its placing in the mold, to coating by metallisation with a thin film of a metal miscible with the metal or alloy constituting said envelope.
- Method according to claim 2 including, after said forming step, subjecting the plug support to degassing under vacuum.
- crankcase envelope is of aluminium alloy and the plug support substantially of sintered aluminium and including coating said support by metallisation with a thin film of aluminium.
- crankcase envelope is of aluminium alloy and the plug support substantially of sintered aluminium and including coating said support by metallisation with a thin film of copper.
- crank case envelope is of a magnesium alloy and the support substantially of sintered magnesium and including coating said support by metallisation with a thin film of magnesium.
- crankcase envelope is of a magnesium alloy and the support substantially of sintered magnesium and including coating said support by metallisation with a thin film of aluminium.
- crankcase envelope is of grey pig iron and the plug support of nickel comprising 7 to 8 percent of thoria, and including coating said support by metallisation with a thin film of copper.
- crankcase envelope is of spheroidal graphite cast iron and the plug support of nickel comprising 7 to 8 percent of thoria, and including coating said support by metallisation with a thin film of copper.
- crankcase envelope is constituted of grey pig iron and the plug support of copper-alumina.
- crankcase envelope is constituted of spheroidal graphite cast iron and the plug support of copper-alumina.
- crankcase envelope is constituted of grey pig iron and the plug support of copper-nickel-alumina.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR182899 | 1968-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3744547A true US3744547A (en) | 1973-07-10 |
Family
ID=8659817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00887973A Expired - Lifetime US3744547A (en) | 1968-12-31 | 1969-12-24 | Methods of manufacturing crank-case envelopes for rotary piston internal combustion engines with sintered metal plug support |
Country Status (5)
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3789909A (en) * | 1972-11-07 | 1974-02-05 | Gen Motors Corp | Dip casting method using transpirationally cooled mold having relieved impervious outer layer |
| US3789910A (en) * | 1972-11-07 | 1974-02-05 | Gen Motors Corp | Dip casting method using transpirationally cooled mold cavity |
| US4279289A (en) * | 1978-10-05 | 1981-07-21 | Honda Giken Kogyo Kabushiki Kaisha | Process for preparation of fiber-reinforced magnesium alloy materials |
| US5066546A (en) * | 1989-03-23 | 1991-11-19 | Kennametal Inc. | Wear-resistant steel castings |
| US20080145252A1 (en) * | 2006-12-15 | 2008-06-19 | Lg Electronics Inc. | Rotary compressor and air conditioner having the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2146183C1 (ru) * | 1998-06-01 | 2000-03-10 | ОАО "Волжские моторы" | Отливка блока цилиндров двигателя внутреннего сгорания и способ ее получения |
-
1968
- 1968-12-31 FR FR182899A patent/FR1600299A/fr not_active Expired
-
1969
- 1969-11-28 ES ES374017A patent/ES374017A1/es not_active Expired
- 1969-12-22 DE DE19691964198 patent/DE1964198A1/de active Pending
- 1969-12-24 US US00887973A patent/US3744547A/en not_active Expired - Lifetime
- 1969-12-24 GB GB62772/69A patent/GB1246580A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3789909A (en) * | 1972-11-07 | 1974-02-05 | Gen Motors Corp | Dip casting method using transpirationally cooled mold having relieved impervious outer layer |
| US3789910A (en) * | 1972-11-07 | 1974-02-05 | Gen Motors Corp | Dip casting method using transpirationally cooled mold cavity |
| US4279289A (en) * | 1978-10-05 | 1981-07-21 | Honda Giken Kogyo Kabushiki Kaisha | Process for preparation of fiber-reinforced magnesium alloy materials |
| US5066546A (en) * | 1989-03-23 | 1991-11-19 | Kennametal Inc. | Wear-resistant steel castings |
| US5337801A (en) * | 1989-03-23 | 1994-08-16 | Kennametal Inc. | Wear-resistant steel castings |
| US20080145252A1 (en) * | 2006-12-15 | 2008-06-19 | Lg Electronics Inc. | Rotary compressor and air conditioner having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| ES374017A1 (es) | 1971-11-16 |
| FR1600299A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1970-07-20 |
| DE1964198A1 (de) | 1970-07-16 |
| GB1246580A (en) | 1971-09-15 |
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