US3908798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized lubrication circulation system for the main bearings of an internal combustion engine
Assignee: Dr Ing HCF Porsche AG
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Filing: 1973-11-26
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Granted: 1975-09-30
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Expires: 1993-11-26
Abstract
Abstract A pressurized lubricant circulation system for the main bearings of an internal combustion engine is provided for an engine of the type having a crankshaft accommodating housing which is split in the plane of the crankshaft axis and consists essentially of a cylinder block and a single-piece bearing block accommodating all of the crankshaft bearings. The cylinder block and bearing block are in contact with each other through broad flange portions forming sealing surfaces. The lubricant circulation system includes a plurality of grooves formed in the face of the bearing block, with the grooves being closed off by the plane sealing surface of the facing cylinder block so that no additional lubricant line means are required. These lubricant circulating grooves include a main line extending along and completely around the plurality of crankshaft bearings and tie lines extending from the main line to communicate lubricant to the individual main bearings. Two tie lines are provided for each main bearing, which communicate with respective opposite lateral sides of the main bearing. A relief groove is also formed in the surface of the bearing block which is positioned outwardly with respect to the main line and tie lines for the lubricant and which includes a drain line communicating with an engine oil sump.
Inventors
- 👤 Robert Binder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:20
CPC Classifications
F; F16; F16C; F16C9/00; F16C9/02; F01; F01M; F01M1/00; F01M1/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
202 words
A lubricant supply system for the main bearings of an internal combustion engine of the type having a plurality of main bearings and a two-part engine housing for accommodating said main bearings, the two parts of the engine housing being joined together along a separation plane at flanges exhibiting sealing surfaces; said system comprising: a main lubricant circulating line, a pair of lubricant tie lines for each main bearing which extend from said main line to each of said main bearings with the tie lines of a pair opening to a respective main bearing at respective diametrically opposite lateral sides of said respective main bearing, wherein each of the main line and the tie lines are formed by groove-like recesses opening to the sealiNg surface of one of said engine parts, said recesses being sealed off by the sealing surface of the other of said engine parts in the assembled condition of the engine parts, and a relief groove in one of said engine parts, said relief groove extending around the main line at a spacing toward the outside of the engine housing for collecting any lubricant that may leak outwardly of said main line between said sealing surfaces of said flanges.
Claim 2
Dependent Claim
202 words
A lubricant supply system for the main bearings of an internal combustion engine of the type having a plurality of main bearings and a two-part engine housing for accommodating said main bearings, the two parts of the engine housing being joined together along a separation plane at flanges exhibiting sealing surfaces; said system comprising: a main lubricant circulating line, a pair of lubricant tie lines for each main bearing which extend from said main line to each of said main bearings with the tie lines of a pair opening to a respective main bearing at respective diametrically opposite lateral sides of said respective main bearing, wherein each of the main line and the tie lines are formed by groove-like recesses opening to the sealiNg surface of one of said engine parts, said recesses being sealed off by the sealing surface of the other of said engine parts in the assembled condition of the engine parts, and a relief groove in one of said engine parts, said relief groove extending around the main line at a spacing toward the outside of the engine housing for collecting any lubricant that may leak outwardly of said main line between said sealing surfaces of said flanges.
Claim 3
Dependent Claim
28 words
A system according to claim 1, wherein said one of said engine parts is a bearing block and the other of said engine parts is a cylinder block.
Claim 4
Dependent Claim
16 words
A system according to claim 2, wherein said cylinder block is positioned above said bearing block.
Claim 5
Dependent Claim
24 words
A system according to claim 3, wherein said separating plane extends through an axis of rotation of a crankshaft supported in said main bearings.
Claim 6
Dependent Claim
31 words
A system according to claim 1, wherein said relief groove is formed in said one of said engine parts which also includes the recesses forming said main line and tie lines.
Claim 7
Dependent Claim
35 words
A system according to claim 5, wherein said recesses and said groove are formed in a bearing block which constitutes one of said engine parts, the other of said engine parts being a cylinder block.
Claim 8
Dependent Claim
16 words
A system according to claim 6, wherein said cylinder block is positioned above said bearing block.
Claim 9
Dependent Claim
24 words
A system according to claim 7, wherein said separating plane extends through an axis of rotation of a crankshaft supported in said main bearings.
Claim 10
Dependent Claim
35 words
A system according to claim 8, further comprising lubricant supply means for continuously supplying lubricant under pressure to said main line and tie lines during operation of an engine formed with said two engine parts.
Claim 11
Dependent Claim
35 words
A system according to claim 1, further comprising lubricant supply means for continuously supplying lubricant under pressure to said main line and tie lines during operation of an engine formed with said two engine parts.
Claim 12
Dependent Claim
43 words
A system according to claim 1, wherein said separating plane extends perpendicular to the direction of movement of cylinders within one of said engine parts, and wherein said tie lines extend to their respective openings to the main bearings along said separating plane.
Claim 13
Dependent Claim
25 words
A system according to claim 11, wherein said separating plane extends horizontally through the axis of rotation of a crankshaft supported in said main bearings.
Claim 14
Dependent Claim
28 words
A system according to claim 1, wherein said two engine parts consist of a cylinder block and a bearing block which together accommodate all engine crankshaft main bearings.
Claim 15
Dependent Claim
24 words
A system according to claim 1, wherein a conduit path is provided for communicating said relief groove to an oil sump of said engine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |