US3628237A - Method of constructing an engine with a prefabricated cylinder liner - Google Patents
Method of constructing an engine with a prefabricated cylinder liner Download PDFInfo
- Publication number
- US3628237A US3628237A US887518A US3628237DA US3628237A US 3628237 A US3628237 A US 3628237A US 887518 A US887518 A US 887518A US 3628237D A US3628237D A US 3628237DA US 3628237 A US3628237 A US 3628237A
- Authority
- US
- United States
- Prior art keywords
- liner
- die
- port
- engine
- blind
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
- F16J10/02—Cylinders designed to receive moving pistons or plungers
- F16J10/04—Running faces; Liners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0009—Cylinders, pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
-
- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49988—Metal casting
- Y10T29/49989—Followed by cutting or removing material
Definitions
- ABSTRACT Disclosed herein is a method of constructing an engine having a cast iron cylinder liner and in which the engine block is die cast around the cylinder liner.
- the cylinder liner is cast with blind ports or recesses on the exterior surfaces.
- the outside and inside of the liner are machined to make the surfaces concentric, and the engine block is die cast around the liner by using a two-piece die with fingers which extend into the blind ports to prevent entry of the metal therein.
- the recesses are opened after the block is die cast by further machining of the inside surface of the liner.
- the invention provides a method of manufacturing an internal combustion engine having an engine block containing a cylinder liner.
- the method includes the steps of fabricating a liner with one or more blind ports or recesses in the outer surface of the liner.
- the inside and outside diameters of the liner are then rough machined to make the surfaces concentric to prepare the liner or sleeve for precise location in a diecasting die.
- the machining operation leaves a thin web of metal in the ports or recesses to keep them closed for the diecasting opera tion.
- the liner is mounted on a locating dowel or center plug and inserted in a two-piece die.
- the die includes transverse fingers or projections which extend into the recesses or blind ports in the liner to prevent entry of metal into the recesses in the liner and to form through openings in the die-cast material or block registering with the recesses in the liner.
- the web of metal across the recesses prevents entry of diecasting metal into the interior of the liner.
- the inside diameter of the liner is machined to remove the web portions in the recesses and thereby open the recesses to provide through apertures in the liner.
- FIG. 1 is a perspective view of a cylinder liner.
- FIG. 2 is a sectional view along line 2-2 of FIG. I.
- FIG. is a fragmentary sectional view showing the step of die casting the engine block around the liner in accordance with the invention.
- FIG. 4 is a sectional view along line 4-4 of FIG. 3.
- FIG. 5 is a fragmentary sectional view of an engine block constructed in accordance with the invention.
- FIG. 6 is a sectional view along the line 6-6 of FIG. 5.
- FIG. 1 shows a cylinder sleeve or liner which is generally designated 10 and which has a cylindrical wall 12 having an internal surface or bore 14 and a peripheral or exterior surface 16.
- the sleeve 10 is conventionally sand cast from a suitable material such as iron using projections in the mold to create blind ports or outwardly open recesses 20 in the outer surface 16.
- the recesses 20 are closed by recess bottoms 21.
- the recess margins or edges 22 desirably taper outwardly for reasons hereinafter described.
- the inside surface 14 of the liner I0 is machined to a first predetermined radius or diameter as shown b the broken line 23, leaving a small web of material 24 whic keeps the recesses 20 sea ed along the diecasting step, hereinafter described.
- the outside surface 116 of the liner 10 is then machined concentric with the inside surface 14 to afford precise location of the liner 10 in the die.
- the liner 10 is mounted on a locating dowel or center core plug 28 and inserted in a twopart die 30 having first and second die portions 32 and 34.
- Both die sections 32 and 34 are provided with projections or finger cores 36 which project into the blind ports or recesses 20 to form ports 38 in a die-cast engine block in registry with the recesses 20 and to prevent entry of molten metal into the recesses 20.
- the die sections 32 and 34 are provided with passage portions 33 and 35 which completely surround the liner and into which metal is introduced through the opening 41 to die cast the engine block 39 (FIG. 3).
- the inside wall 14 is machined to a second diameter as shown in FIGS. 5 and 6 to remove the web portions 24 in the recesses to provide through openings or ports in the engine block. Any excess metal remaining around the finger cores 36 can be punched out of the ports 38 after removal of the web portions 24. The removal of the excess metal is facilitated by the outwardly tapered excess edges 22.
- Various port arrangements and ports locations can be utilized with the method of the invention, and axially aligned ports (not shown) can be utilized with an exterior casting to form a transfer passage to afford communication of a fuel-air mixture from the crank case to the combustion chamber above the piston.
- a method of constructing an engine cylinder block having a cylinder liner comprising the steps of fabricating the cylinder liner with a blind recess in the exterior surface of the liner, machining the inside surface of the liner leaving a web of metal closing the recess, die casting an engine block around the liner with a die having a finger projecting into the recess, and machining the inside diameter of the liner to remove the web.
- a method of constructing an engine cylinder block comprising casting a cylinder liner with an outwardly open blind port on the exterior surface of the liner, machining the inside surface of the liner to a predetermined first radius less than the radius of the bottom of the port, die casting a cylinder block around the liner with a finger in the die extending into the blind port to prevent entry of metal into the blind port to form a port in the block in registry with the blind port in the liner and machining the inside surface of the liner to a second radius greater than the radius of the liner port bottom, whereby to remove the bottom of the liner port.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Disclosed herein is a method of constructing an engine having a cast iron cylinder liner and in which the engine block is die cast around the cylinder liner. The cylinder liner is cast with blind ports or recesses on the exterior surfaces. The outside and inside of the liner are machined to make the surfaces concentric, and the engine block is die cast around the liner by using a twopiece die with fingers which extend into the blind ports to prevent entry of the metal therein. The recesses are opened after the block is die cast by further machining of the inside surface of the liner.
Description
United States Patent [72] Inventor Kurt F. Ziegler Zion, Ill. [21] Appl. No. 887,518 [22] Filed Dec. 23, 1969 [45] Patented Dec. 21, 1971 [73] Assignee Outboard Marine Corporation Waukegan, Ill.
[54] METHOD OF CONSTRUCTING AN ENGINE WITH A PREFABRICATED CYLINDER LINER 3 Claims, 6 Drawing Figs.
[52] US. Cl 29/527.6,
' 92/222 [51] Int. Cl 823p 17/00, 823p 25/00 [50] Field of Search 29/527.6, 527.5, 156.5; 92/222, 225, 224
[56] References Cited UNITED STATES PATENTS 3,251,119 5/1966 Kingsbury et a1. 29/527.6
3,402,644 9/1968 Geiger et al. 92/224 3,475,804 11/1969 Geiger et a1. 2 /1566 3,533,329 10/1970 Galli 92/222 ABSTRACT: Disclosed herein is a method of constructing an engine having a cast iron cylinder liner and in which the engine block is die cast around the cylinder liner. The cylinder liner is cast with blind ports or recesses on the exterior surfaces. The outside and inside of the liner are machined to make the surfaces concentric, and the engine block is die cast around the liner by using a two-piece die with fingers which extend into the blind ports to prevent entry of the metal therein.
The recesses are opened after the block is die cast by further machining of the inside surface of the liner.
PATENTED [IEC21 12m 3628-237 m'r-roewavs METHOD OF CONSTRUCTING AN ENGINE WITH A IPREFABRICATED CYLINDER LINER BACKGROUND OF INVENTION SUMMARY OF THE INVENTION The invention provides a method of manufacturing an internal combustion engine having an engine block containing a cylinder liner. The method includes the steps of fabricating a liner with one or more blind ports or recesses in the outer surface of the liner. The inside and outside diameters of the liner are then rough machined to make the surfaces concentric to prepare the liner or sleeve for precise location in a diecasting die. The machining operation leaves a thin web of metal in the ports or recesses to keep them closed for the diecasting opera tion.
In die casting the engine block, the liner is mounted on a locating dowel or center plug and inserted in a two-piece die. The die includes transverse fingers or projections which extend into the recesses or blind ports in the liner to prevent entry of metal into the recesses in the liner and to form through openings in the die-cast material or block registering with the recesses in the liner. In addition, the web of metal across the recesses prevents entry of diecasting metal into the interior of the liner. Subsequent to die casting, the inside diameter of the liner is machined to remove the web portions in the recesses and thereby open the recesses to provide through apertures in the liner.
It is an object of the invention to provide a method of constructing an engine block around a cylinder liner or sleeve by diecasting techniques rather than using conventional sand casting techniques.
It is a further object of the invention to provide a method of constructing an engine by fabricating a cylinder liner with blind ports, machining the inside and outside diameters of the liner, die casting the engine block around the liner using a die having transverse fingers which project into the blind ports to prevent the entry of metal into the blind ports during the casting operation and opening the ports by machining the inside diameter of the liner.
Other objects and advantages of the invention will become apparent from the following disclosure.
DRAWINGS FIG. 1 is a perspective view of a cylinder liner.
FIG. 2 is a sectional view along line 2-2 of FIG. I.
FIG. is a fragmentary sectional view showing the step of die casting the engine block around the liner in accordance with the invention.
FIG. 4 is a sectional view along line 4-4 of FIG. 3.
FIG. 5 is a fragmentary sectional view of an engine block constructed in accordance with the invention.
FIG. 6 is a sectional view along the line 6-6 of FIG. 5.
DETAILED DESCRIPTION Referring to the drawings, FIG. 1 shows a cylinder sleeve or liner which is generally designated 10 and which has a cylindrical wall 12 having an internal surface or bore 14 and a peripheral or exterior surface 16. The sleeve 10 is conventionally sand cast from a suitable material such as iron using projections in the mold to create blind ports or outwardly open recesses 20 in the outer surface 16. The recesses 20 are closed by recess bottoms 21.
The recess margins or edges 22 desirably taper outwardly for reasons hereinafter described.
In accordance with the method of the invention, the inside surface 14 of the liner I0 is machined to a first predetermined radius or diameter as shown b the broken line 23, leaving a small web of material 24 whic keeps the recesses 20 sea ed along the diecasting step, hereinafter described. The outside surface 116 of the liner 10 is then machined concentric with the inside surface 14 to afford precise location of the liner 10 in the die.
As shown in FIGS. 3 and 4, the liner 10 is mounted on a locating dowel or center core plug 28 and inserted in a twopart die 30 having first and second die portions 32 and 34. Both die sections 32 and 34 are provided with projections or finger cores 36 which project into the blind ports or recesses 20 to form ports 38 in a die-cast engine block in registry with the recesses 20 and to prevent entry of molten metal into the recesses 20. The die sections 32 and 34 are provided with passage portions 33 and 35 which completely surround the liner and into which metal is introduced through the opening 41 to die cast the engine block 39 (FIG. 3).
Upon removal of the engine block 39 and liner 10, the inside wall 14 is machined to a second diameter as shown in FIGS. 5 and 6 to remove the web portions 24 in the recesses to provide through openings or ports in the engine block. Any excess metal remaining around the finger cores 36 can be punched out of the ports 38 after removal of the web portions 24. The removal of the excess metal is facilitated by the outwardly tapered excess edges 22.
Various port arrangements and ports locations can be utilized with the method of the invention, and axially aligned ports (not shown) can be utilized with an exterior casting to form a transfer passage to afford communication of a fuel-air mixture from the crank case to the combustion chamber above the piston.
Various of the features of the invention are set forth in the following claims.
What is claimed is:
l. A method of constructing an engine cylinder block having a cylinder liner, said method comprising the steps of fabricating the cylinder liner with a blind recess in the exterior surface of the liner, machining the inside surface of the liner leaving a web of metal closing the recess, die casting an engine block around the liner with a die having a finger projecting into the recess, and machining the inside diameter of the liner to remove the web.
2. A method of constructing an engine cylinder block comprising casting a cylinder liner with an outwardly open blind port on the exterior surface of the liner, machining the inside surface of the liner to a predetermined first radius less than the radius of the bottom of the port, die casting a cylinder block around the liner with a finger in the die extending into the blind port to prevent entry of metal into the blind port to form a port in the block in registry with the blind port in the liner and machining the inside surface of the liner to a second radius greater than the radius of the liner port bottom, whereby to remove the bottom of the liner port.
3. A method in accordance with claim 2 plus the additional step of machining the outside surface of the liner prior to die casting the cylinder block.
my UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION D t December 21, 1221 Patent No. 3 ,628 .237
Inventor(s) Kurt F. Ziegler It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
(SEAL) Attest:
ROBERT GOTI'SCHALK EDWARD M.FLETCHER,JR. Attestlng Officer Commissioner of Patents
Claims (3)
1. A method of constructing an engine cylinder block having a cylinder liner, said method comprising the steps of fabricating the cylinder liner with a blind recess in the exterior surface of the liner, machining the inside surface of the liner leaving a web of metal closing the recess, die casting an engine block around the liner with a die having a finger projecting into the recess, and machining the inside diameter of the liner to remove the web.
2. A method of constructing an engine cylinder block comprising casting a cylinder liner with an outwardly open blind port on the exterior surface of the liner, machining the inside surface of the liner to a predetermined first radius less than the radius of the bottom of the port, die casting a cylinder block around the liner with a finger in the die extending into the blind port to prevent entry of metal into the blind port to form a port in the block in registry with the blind port in the liner and machining the inside surface of the liner to a second radius greater than the radius of the liner port bottom, whereby to remove the bottom of the liner port.
3. A method in accordance with claim 2 plus the additional step of machining the outside surface of the liner prior to die casting the cYlinder block.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US88751869A | 1969-12-23 | 1969-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3628237A true US3628237A (en) | 1971-12-21 |
Family
ID=25391321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US887518A Expired - Lifetime US3628237A (en) | 1969-12-23 | 1969-12-23 | Method of constructing an engine with a prefabricated cylinder liner |
Country Status (2)
Country | Link |
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US (1) | US3628237A (en) |
CA (1) | CA924087A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3860058A (en) * | 1973-11-05 | 1975-01-14 | Ford Motor Co | Method of forming dimensional holes in the wankel rotor housing electroform |
US3921701A (en) * | 1973-08-20 | 1975-11-25 | Ford Motor Co | Method for improving bond between transplanted coating and die-casting |
US3937266A (en) * | 1973-08-20 | 1976-02-10 | Ford Motor Company | Method for application of wear-resistant coating |
US3948309A (en) * | 1973-08-20 | 1976-04-06 | Ford Motor Company | Composite rotor housing with wear-resistant coating |
US4963083A (en) * | 1988-12-16 | 1990-10-16 | Motor Wheel Corporation | Composite metal-elastomer styled wheels and method and apparatus for molding the same |
US5291654A (en) * | 1993-03-29 | 1994-03-08 | United Technologies Corporation | Method for producing hollow investment castings |
US6702908B1 (en) | 2002-01-16 | 2004-03-09 | Hamilton Sundstrand Corporation | Method of making a cylinder block with unlined piston bores |
US20100116240A1 (en) * | 2007-04-04 | 2010-05-13 | Gkn Sinter Metals, Llc. | Multi-piece thin walled powder metal cylinder liners |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3251119A (en) * | 1964-09-17 | 1966-05-17 | Clevite Corp | Methods of making dual material flange bearings |
US3402644A (en) * | 1966-10-31 | 1968-09-24 | Int Harvester Co | Internal combustion engine piston with prestressed insert |
US3475804A (en) * | 1966-10-31 | 1969-11-04 | Int Harvester Co | Internal combustion engine piston with pre-stressed insert |
US3533329A (en) * | 1968-01-09 | 1970-10-13 | Ercole Galli | Method for manufacturing light alloy pistons with an insert of a different metal,and pistons manufactured thereby |
-
1969
- 1969-12-23 US US887518A patent/US3628237A/en not_active Expired - Lifetime
-
1970
- 1970-07-09 CA CA087821A patent/CA924087A/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3251119A (en) * | 1964-09-17 | 1966-05-17 | Clevite Corp | Methods of making dual material flange bearings |
US3402644A (en) * | 1966-10-31 | 1968-09-24 | Int Harvester Co | Internal combustion engine piston with prestressed insert |
US3475804A (en) * | 1966-10-31 | 1969-11-04 | Int Harvester Co | Internal combustion engine piston with pre-stressed insert |
US3533329A (en) * | 1968-01-09 | 1970-10-13 | Ercole Galli | Method for manufacturing light alloy pistons with an insert of a different metal,and pistons manufactured thereby |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3921701A (en) * | 1973-08-20 | 1975-11-25 | Ford Motor Co | Method for improving bond between transplanted coating and die-casting |
US3937266A (en) * | 1973-08-20 | 1976-02-10 | Ford Motor Company | Method for application of wear-resistant coating |
US3948309A (en) * | 1973-08-20 | 1976-04-06 | Ford Motor Company | Composite rotor housing with wear-resistant coating |
US3860058A (en) * | 1973-11-05 | 1975-01-14 | Ford Motor Co | Method of forming dimensional holes in the wankel rotor housing electroform |
US4963083A (en) * | 1988-12-16 | 1990-10-16 | Motor Wheel Corporation | Composite metal-elastomer styled wheels and method and apparatus for molding the same |
US5291654A (en) * | 1993-03-29 | 1994-03-08 | United Technologies Corporation | Method for producing hollow investment castings |
US6702908B1 (en) | 2002-01-16 | 2004-03-09 | Hamilton Sundstrand Corporation | Method of making a cylinder block with unlined piston bores |
US7401588B1 (en) | 2002-01-16 | 2008-07-22 | Hamilton Sundstrand Corporation | Cylinder block with unlined piston bores |
US20100116240A1 (en) * | 2007-04-04 | 2010-05-13 | Gkn Sinter Metals, Llc. | Multi-piece thin walled powder metal cylinder liners |
Also Published As
Publication number | Publication date |
---|---|
CA924087A (en) | 1973-04-10 |
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