US4630345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing a cylinder unit for a cylinder piston combustion engine
Assignee: Sachs Systemtechnik GmbH
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Filing: 1984-03-21
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Granted: 1986-12-23
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Expires: 2004-03-21
Abstract
Abstract A cylinder unit of a cylinder-piston-combustion engine comprises a cylinder housing and a lining unit inserted into the cylinder housing. The lining unit consists of a cylindrical liner sleeve and a terminal wall and encloses a combustion space. The terminal wall is integral with the liner sleeve. The lining unit is manufactured by a non-cutting manufacturing method like cold impact forming, hot impact forming, deep drawing, tube reshaping, press molding or injection molding.
Inventors
- 👤 Dieter Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:24
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/18; F02F1/02; F02F1/04; F02F1/06; F02F1/08; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y10; Y10S; Y10S29/00; Y10S29/031; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/4927; Y10T29/49272; Y10T29/49826; Y10T29/49945; Y10T29/4998; Y10T29/49988
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
214 words
A method of manufacturing an axially extending cylinder unit having a pair of opposite ends spaced apart in the axial direction thereof for a cylinder piston combustion engine, said cylinder unit comprising an internal cylindrical guiding face for a piston extending in the axial direction of the cylinder unit and at least one internal combustion space limiting face at one end of the cylinder unit and extending, at least partially, transversely of the axial direction of the cylinder unit and forming a combustion space, said method comprising the steps of (a) forming the cylinder unit as a lining unit (1) having a longitudinal axis corresponding to the axis of the cylinder unit by one of the forming operations selected from the group consisting of cold impact forming, hot impact forming, deep drawing, press molding and injection molding, said lining unit being a monolithic unit including a cylindrical liner sleeve (1a) produced in the forming step and forming said internal cylindrical guiding face and further forming said internal combustion space limiting face, said cylindrical internal guiding face and said internal combustion space limiting face produced in the forming step being ready for operation without further machining, and said method further comprising the step of (b) incorporating said lining unit (1) into a cylinder housing (8).
Claim 2
Independent Claim
214 words
A method of manufacturing an axially extending cylinder unit having a pair of opposite ends spaced apart in the axial direction thereof for a cylinder piston combustion engine, said cylinder unit comprising an internal cylindrical guiding face for a piston extending in the axial direction of the cylinder unit and at least one internal combustion space limiting face at one end of the cylinder unit and extending, at least partially, transversely of the axial direction of the cylinder unit and forming a combustion space, said method comprising the steps of (a) forming the cylinder unit as a lining unit (1) having a longitudinal axis corresponding to the axis of the cylinder unit by one of the forming operations selected from the group consisting of cold impact forming, hot impact forming, deep drawing, press molding and injection molding, said lining unit being a monolithic unit including a cylindrical liner sleeve (1a) produced in the forming step and forming said internal cylindrical guiding face and further forming said internal combustion space limiting face, said cylindrical internal guiding face and said internal combustion space limiting face produced in the forming step being ready for operation without further machining, and said method further comprising the step of (b) incorporating said lining unit (1) into a cylinder housing (8).
Claim 3
Dependent Claim
33 words
A method as set forth in claim 1, including forming a cooling space defined between said lining unit (1) and said cylinder housing (8) when incorporating said lining unit into said cylinder housing.
Claim 4
Dependent Claim
32 words
A method as set forth in claim 1, including shaping said cylinder housing around said lining unit in an operation selected from the group consisting of casting, die casting and injection molding.
Claim 5
Dependent Claim
39 words
A method as set forth in claim 3, including providing at least one slot in said liner sleeve (1a) and aligning said slot with at least one gas exchange channel (17, 18, 32), extending through said cylinder housing (8).
Claim 6
Dependent Claim
36 words
A method as set forth in claim 4, including surrounding at least part of said slot with a rib (236, 237) projecting away from said combustion space and engaging a recess of said cylinder housing (208).
Claim 7
Dependent Claim
69 words
A method as set forth in claim 1, including providing said cylinder housing by forming the cylinder housing as cylinder halves (8) and applying the cylinder halves to said lining unit (1) from opposite sides thereof for approaching each other in a plane containing the axis of the lining unit (1), and clamping said lining unit between said cylinder halves (8a) by interconnecting said cylinder halves with clamping means.
Claim 8
Dependent Claim
25 words
A method as set forth in claim 1, including forming each of said lining unit (1) and said cylinder housing (8) from a different material.
Claim 9
Dependent Claim
16 words
A method as set forth in claim 1, including forming said lining unit (1) of metal.
Claim 10
Dependent Claim
17 words
A method as set forth in claim 8, including forming said lining unit (1) of ferro alloy.
Claim 11
Dependent Claim
16 words
A method as set forth in claim 8, including forming said lining unit of light metal.
Claim 12
Dependent Claim
18 words
A method as set forth in claim 10, including forming said lining unit (1) of an aluminum alloy.
Claim 13
Dependent Claim
17 words
A method as set forth in claim 1, including forming said lining unit (1) of plastics material.
Claim 14
Dependent Claim
18 words
A method as set forth in claim 12, including forming said lining unit (1) of carbonized plastics material.
Claim 15
Dependent Claim
15 words
A method as set forth in claim 12, including reinforcing the plastics material with fibers.
Claim 16
Dependent Claim
46 words
A method as set forth in claim 1, including forming the lining unit (1) with a terminal wall (1b) forming the at least one internal combustion limiting face and at least partially covering the terminal wall (1b) by a terminal wall of said cylinder housing (8).
Claim 17
Dependent Claim
44 words
A method as set forth in claim 15, forming at least one coolant chamber (22) between said lining unit (1) and said cylinder housing (8) and forming said coolant chamber as an annular coolant chamber extending around the axis of said lining unit (1).
Claim 18
Dependent Claim
23 words
A method as set forth in claim 16, including providing sealing ring means between said lining unit (1) and said cylinder housing (8).
Claim 19
Dependent Claim
45 words
A method as set forth in claim 16, including locating the coolant chamber in the region of the terminal wall (1b) of said lining unit (1) and providing a terminal wall in said cylinder housing (8) also located in the region of the coolant chamber.
Claim 20
Dependent Claim
42 words
A method as set forth in claim 18, including providing overlapping openings (11a, 14) in said terminal wall (1b) of said lining unit and said terminal wall of said cylinder housing (8) and inserting a spark plug (9) in the overlapping openings.
Claim 21
Dependent Claim
44 words
A method as set forth in claim 19, including securing said terminal wall (1b) of said lining (1) and said terminal wall of said cylinder housing (8) against at least one of relative rotation and relative axial movement adjacent said overlapping openings (11a, 14).
Claim 22
Dependent Claim
113 words
A method as set forth in claim 15, including providing overlapping openings (11a, 14) in said terminal wall (16) of said lining unit and in said terminal wall of said cylinder housing (8), forming a collar (11) on said liner unit (1) surrounding said opening (11a) of said terminal wall (1b) and projecting into said opening (14) of said cylinder housing and providing a free end of said collar within said opening (14), threading an external threaded projection on an injection nozzle into an internal thread of said collar (11) and abutting a shoulder (9a) of said injection nozzle against an external face (31a) surrounding said opening (14) of said cylinder housing (8).
Claim 23
Dependent Claim
91 words
A method as set forth in claim 15, including forming a collar (11) on said liner unit (1) surrounding said opening (11a) of said terminal wall (1b) and projecting into said opening (14) of said cylinder housing and providing a free end of said collar within said opening (14), inserting a spark plug (9) with an external threaded projection into an internal thread in said collar (11) add positioning a shoulder (9a) of said spark plug abutting against an external face (31) surrounding said opening (14) of said cylinder housing (8).
Claim 24
Dependent Claim
22 words
A method as set forth in claim 22, including providing a washer (13) between said shoulder (9a) and said external face (31).
Claim 25
Dependent Claim
41 words
A method as set forth in claim 18, including forming overlapping openings (11a, 14) in said terminal wall (1b) of said lining unit and said terminal wall of said cylinder housing (8) and placing an injection nozzle in the overlapping openings.
Claim 26
Dependent Claim
43 words
A method as set forth in claim 18, including forming overlapping openings (11a, 14) in said terminal wall (1b) of said lining unit and said terminal wall of said cylinder housing (8), and placing a gas exchange valve unit in the overlapping openings.
Claim 27
Dependent Claim
27 words
A method as set forth in claim 1, including providing at least one sealing member (20, 21) between said cylinder housing (8) and said lining unit (1).
Claim 28
Dependent Claim
17 words
A method as set forth in claim 1, including forming said cylinder housing (8) of light metal.
Claim 29
Dependent Claim
18 words
A method as set forth in claim 27, including forming said cylinder housing (8) of a magnesium alloy.
Claim 30
Dependent Claim
15 words
A method as set forth in claim 27, including die casting said cylinder housing (8).
Claim 31
Dependent Claim
18 words
A method as set forth in claim 1, including forming said cylinder housing (8) of a plastics material.
Claim 32
Dependent Claim
19 words
A method as set forth in claim 30, including reinforcing the plastics material forming said cylinder housing with fibers.
Claim 33
Dependent Claim
15 words
A method as set forth in claim 30, including pressure molding of said cylinder housing.
Claim 34
Dependent Claim
15 words
A method as set forth in claim 30, including injection molding said cylinder housing (8).
Claim 35
Dependent Claim
19 words
A method as set forth in claim 1, including forming said cylinder housing (8) of a curable plastics material.
Claim 36
Dependent Claim
51 words
A method as set forth in claim 1, including forming said cylinder housing of two cylinder halves, placing said cylinder halves around said lining unit (1), clamping said cylinder halves together around said lining unit (1), and providing said cylinder halves integrally with corresponding cylinder halves of a crank case (5a).
Claim 37
Dependent Claim
19 words
A method as set forth in claim 1, including press fitting said lining unit within said cylinder housing (8).
Claim 38
Dependent Claim
21 words
A method as set forth in claim 1, including casting said cylinder housing of the housing material around said lining unit.
Claim 39
Dependent Claim
22 words
A method as set forth in claim 1, including die casting said cylinder housing of the housing material around said lining unit.
Claim 40
Dependent Claim
23 words
A method as set forth in claim 1, including injection molding said cylinder housing (208) of the housing material around said lining unit.
Claim 41
Dependent Claim
41 words
A method as set forth in claim 1, including forming said liner sleeve (108a) with an oval-shaped cross-section in a plane perpendicular to said axis of said liner sleeve, with said oval-shaped section having a shorter axis and a longer axis.
Claim 42
Dependent Claim
36 words
A method as set forth in claim 40, including forming two valve openings (125) in said terminal wall (101b) of said lining unit and spacing said valve openings along the longer axis of said oval-shaped cross-section.
Claim 43
Dependent Claim
36 words
A method as set forth in claim 40, including forming two valve openings (125) in said terminal wall (101b) of said lining unit and spacing said valve openings along the longer axis of said elliptical-shaped cross-section.
Claim 44
Dependent Claim
41 words
A method as set forth in claim 40, comprising forming said liner sleeve of a plurality of liner sleeve sections arranged in series with the longer axis (124) arranged transversely of the direction of the series of said liner sleeve sections.
Claim 45
Dependent Claim
41 words
A method as set forth in claim 1, including forming said inner sleeve (108a) with an elliptical-shaped cross-section in a plane perpendicular to said axis of said liner sleeve, with said elliptical-shaped section having a shorter axis and a longer axis.
Claim 46
Dependent Claim
39 words
A method as set forth in claim 44, comprising forming said liner sleeve of a plurality of liner sleeves arranged in series with the longer axis (124) arranged transversely of the direction of the series of said liner sleeves.
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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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |