US4606304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One-piece engine block
Assignee: Volkswagen AG
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Filing: 1981-11-18
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Granted: 1986-08-19
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Expires: 2001-11-18
Abstract
Abstract An internal-combustion engine includes an engine block, a plurality of parallel cylinders and oil chambers defined in the engine block; intake valves, exhaust valves, overhead valve controls and crankshaft bearings supported in the engine block as well as a pump supported in the engine block for delivering oil through the oil chambers for cooling the engine. The engine block is a single-piece cast component in which the oil chambers extend adjacent and parallel to the cylinders and are accessible from opposite sides of the engine block where the crankshaft bearings and the valve controls are supported.
Inventors
- 👤 Hermann Kruger
- 👤 Hermann Deutsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:24
CPC Classifications
F; F01; F01P; F01P3/00; F01P3/02; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; F01L1/053; F01L1/0532; F01P9/00; F01P9/04; F02; F02F; F02F1/00; F02F1/002; F02B; F02B2275/00; F02B2275/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
108 words
An internal combustion engine comprising a single-piece cast engine block; a plurality of parallel cylinders and cooling chambers defined in the single-piece cast engine block; said cooling chambers extending adjacent and parallel to said cylinders and using solely oil as a liquid coolant; intake valves, exhaust valves, overhead valve control means and crankshaft bearings supported in said one-piece cast engine block; said cooling chambers being accessible from opposite sides of said one-piece cast engine block where said crankshaft bearings and said valve control means are supported; said one-piece cast engine block further defining at least one oil port arranged at a height level of said valve control means.
Claim 2
Dependent Claim
108 words
An internal combustion engine comprising a single-piece cast engine block; a plurality of parallel cylinders and cooling chambers defined in the single-piece cast engine block; said cooling chambers extending adjacent and parallel to said cylinders and using solely oil as a liquid coolant; intake valves, exhaust valves, overhead valve control means and crankshaft bearings supported in said one-piece cast engine block; said cooling chambers being accessible from opposite sides of said one-piece cast engine block where said crankshaft bearings and said valve control means are supported; said one-piece cast engine block further defining at least one oil port arranged at a height level of said valve control means.
Claim 3
Dependent Claim
41 words
An internal-combustion engine as defined in claim 1, wherein said valve control means includes a camshaft and camshaft bearings supported in said engine; said engine block extending from the middle of said crankshaft bearings to the middle of said camshaft bearings.
Claim 4
Dependent Claim
28 words
An internal-combustion engine as defined in claim 1 further comprising cooling ribs forming part of the engine block and being arranged in a zone of said oil chambers.
Claim 5
Dependent Claim
60 words
An internal-combustion engine as defined in claim 1, wherein said engine block further defines intake and exhaust channels communicating with respective cylinders; said intake and exhaust channels being void of undercut portions as viewed from sides of the engine block and from the respective cylinders for permitting removal therefrom of reusable cores upon conclusion of casting of the engine block.
Claim 6
Dependent Claim
87 words
An internal-combustion engine as defined in claim 1, wherein said engine block further defines intake and exhaust channels communicating with respective cylinders; further comprising projections forming part of the engine block; said projections being situated above respective said cylinders on a side of said engine block remote from said intake and exhaust channels; each said projection defining a space accommodating part of said valve control means; said valves and said cylinders having parallel axes; said projections extending parallel to the axes of said cylinders and said valves.
Claim 7
Dependent Claim
43 words
An internal-combustion engine as defined in claim 1, wherein said engine block further defines intake and exhaust channels communicating with respective cylinders; said oil chambers having cross-sectional changes in a zone of said intake and exhaust channels for affecting an oil flow therein.
Claim 8
Dependent Claim
34 words
An internal-combustion engine as defined in claim 1, further comprising means situated in said oil chambers at predetermined hot locations of said oil chambers for reducing heat transfer to oil in said oil chambers.
Claim 9
Dependent Claim
46 words
An internal-combustion engine as defined in claim 1, wherein each said oil chamber has opposite first and second ends situated, respectively, at said opposite sides of said engine block; each said oil chamber extending parallel to said cylinders from said first end to said second end.
Claim 10
Dependent Claim
42 words
An internal-combustion engine as defined in claim 1, wherein said oil chambers are void of undercut portions as viewed from said opposite sides of the engine block for permitting removal therefrom of reusable cores upon conclusion of casting of the engine block.
Claim 11
Dependent Claim
52 words
An internal-combusiton engine as defined in claim 9, wherein said engine block further defines oil delivering channels extending at a height level of said valve control means at a location externally of a path of removal of the reusable cores; and oil ports connecting said oil delivering channels with said oil chambers.
Claim 12
Dependent Claim
43 words
An internal-combustion engine as defined in claim 10, further comprising an oil reservoir attached to said engine block; said oil chambers being in communication with said oil reservoir, whereby oil may flow from said oil ports through said oil chambers into said reservoir.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |