Patent US4779588A successfully refreshed from Google Patents.
US4779588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooled multi-cylinder internal combustion engine
Assignee: Dr Ing HCF Porsche AG
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Filing: 1987-05-15
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Granted: 1988-10-25
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Expires: 2007-05-15
Abstract
Abstract An air-cooled multi-cylinder internal combustion engine in which cooling air flows through a cylinder row transversely to the cylinders. A one-piece deflection part made of light-metal or plastic material and covering all cylinders is arranged as air guide device at the cooling air discharge side.
Inventors
- 👤 Gerhard Ziegler
- 👤 Karl Gregotsch
- 👤 Walter Mittermeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:05
CPC Classifications
F; F01; F01P; F01P1/00; F01P1/02; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/28; F02F1/30; F02F1/34
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
112 words
An air-cooled multi-cylinder internal combustion engine whose cylinders are arranged in a row and clamped in between associated cylinder heads and crankcase, are cast individually and for cooling purposes are provided externally with transversely extending rib means through which cooling air flows in a transverse direction of the cylinders, comprising air guide means arranged at the cooling air discharge side of the cylinders which is constructed as a one-piece deflection means covering all cylinders, wherein the deflection means is mounted on the crankcase and is threadably secured therewith, and wherein the deflection means includes within the area of the center planes of the cylinders, fastening eyes extending in the longitudinal direction thereof.
Claim 2
Dependent Claim
112 words
An air-cooled multi-cylinder internal combustion engine whose cylinders are arranged in a row and clamped in between associated cylinder heads and crankcase, are cast individually and for cooling purposes are provided externally with transversely extending rib means through which cooling air flows in a transverse direction of the cylinders, comprising air guide means arranged at the cooling air discharge side of the cylinders which is constructed as a one-piece deflection means covering all cylinders, wherein the deflection means is mounted on the crankcase and is threadably secured therewith, and wherein the deflection means includes within the area of the center planes of the cylinders, fastening eyes extending in the longitudinal direction thereof.
Claim 3
Dependent Claim
116 words
An air-cooled multi-cylinder internal combustion engine whose cylinders are arranged in a row and clamped in between associated cylinder heads and crankcase, are cast individually and for cooling purposes are provided externally with transversely extending rib means through which cooling air flows in a transverse direction of the cylinders, comprising air guide means arranged at the cooling air discharge side of the cylinders which is constructed as a one-piece deflection means covering all cylinders, wherein the deflection means is mounted on the cylinders and is threadably secured with the same, and wherein radially projecting eyes are cast-on at all cylinders within the area of their center planes, the deflection means being threadably secured at said eyes.
Claim 4
Dependent Claim
116 words
An air-cooled multi-cylinder internal combustion engine whose cylinders are arranged in a row and clamped in between associated cylinder heads and crankcase, are cast individually and for cooling purposes are provided externally with transversely extending rib means through which cooling air flows in a transverse direction of the cylinders, comprising air guide means arranged at the cooling air discharge side of the cylinders which is constructed as a one-piece deflection means covering all cylinders, wherein the deflection means is mounted on the cylinders and is threadably secured with the same, and wherein radially projecting eyes are cast-on at all cylinders within the area of their center planes, the deflection means being threadably secured at said eyes.
Claim 5
Dependent Claim
31 words
An internal combustion engine according to claim 2, further comprising a knock sensor mounted on the deflection means approximately centrally to its longitudinal dimension and threadably secured with said deflection means.
Claim 6
Dependent Claim
82 words
An air-cooled multi-cylinder internal combustion engine whose cylinders are arranged in a row and clamped in between associated cylinder heads and crankcase, are cast individually and for cooling purposes are provided externally with transversely extending rib means through which cooling air flows in a transverse direction of the cylinders, comprising air guide means arranged at the cooling air discharge side of the cylinders which is constructed as a one-piece deflection means covering all cylinders, and wherein the deflection means is constructed double-walled.
Claim 7
Dependent Claim
82 words
An air-cooled multi-cylinder internal combustion engine whose cylinders are arranged in a row and clamped in between associated cylinder heads and crankcase, are cast individually and for cooling purposes are provided externally with transversely extending rib means through which cooling air flows in a transverse direction of the cylinders, comprising air guide means arranged at the cooling air discharge side of the cylinders which is constructed as a one-piece deflection means covering all cylinders, and wherein the deflection means is constructed double-walled.
Claim 8
Dependent Claim
22 words
An internal combustion engine according to claim 4, wherein the deflection means is cast of light metal or made of plastic material.
Claim 9
Dependent Claim
42 words
An internal combustion engine according to claim 4, wherein the deflection means is provided within the area between the cylinders with bent-in portions directed toward the cylinders and with air discharge openings within the area of the center planes of the cylinders.
Claim 10
Dependent Claim
42 words
An internal combustion engine according to claim 5, wherein the deflection means is provided within the area between the cylinders with bent-in portions directed toward the cylinders and with air discharge openings within the area of the center planes of the cylinders.
Claim 11
Dependent Claim
22 words
An internal combustion engine according to claim 7, wherein the deflection means is mounted on the crankcase and is threadably secured therewith.
Claim 12
Dependent Claim
31 words
An internal combustion engine according to claim 8, wherein the deflection means includes within the area of the center planes of the cylinders, fastening eyes extending in the longitudinal direction thereof.
Claim 13
Dependent Claim
24 words
An internal combustion engine according to claim 7, wherein the deflection means is mounted on the cylinders and is threadably secured with the same.
Claim 14
Dependent Claim
33 words
An internal combustion engine according to claim 10, wherein radially projecting eyes are cast-on at all cylinders within the area of their center planes, the deflection means being threadably secured at said eyes.
Claim 15
Dependent Claim
31 words
An internal combustion engine according to claim 11, further comprising a knock sensor mounted on the deflection means approximately centrally to its longitudinal dimension and threadably secured with said deflection means.
References Cited (Backward Citations)
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |