EP0073476A2 - Fan shroud - Google Patents
Fan shroud Download PDFInfo
- Publication number
- EP0073476A2 EP0073476A2 EP82107826A EP82107826A EP0073476A2 EP 0073476 A2 EP0073476 A2 EP 0073476A2 EP 82107826 A EP82107826 A EP 82107826A EP 82107826 A EP82107826 A EP 82107826A EP 0073476 A2 EP0073476 A2 EP 0073476A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan shroud
- air guide
- radiator
- cylindrical flange
- set forth
- 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.)
- Granted
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Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/06—Guiding or ducting air to, or from, ducted fans
Definitions
- the present invention relates to the cooling of automotive engines and particularly to a fan shroud arranged in the rear of a radiator to increase the cooling system efficiency.
- Figs. 1 and 2 show a typical example of a fan shroud 10 arranged in the rear of a radiator 12 of a water-cooled automotive engine 14.
- a cooling fan 16 is shrouded by the fan shroud 10 to increase the cooling system efficiency.
- the fan shroud 10 is rectangular in external shape in accordance with the shape of a radiator core (not shown) and has a ventilation opening 18 in which the cooling fan 16 is disposed to draw air through the radiator 12.
- the fan shroud 10 is formed with a short cylindrical flange 20 which is uniform in diameter.
- Another disadvantage is that the amount of air to be supplied to the constituent parts of the engine 14 such as an oil pan and an exhaust manifold for cooling same is reduced since part of the air that has passed through the radiator 12 is allowed to flow radially of the cooling fan 16 and thus deflected away from those parts.
- a novel and improved fan shroud which is arranged in the rear of a radiator of an automotive engine.
- the fan shroud comprises, as usual, a ventilation opening in which a cooling fan is disposed to draw air through the radiator.
- the fan shroud is further provided with an air guide means for deflecting air that is going to escape radially of the radiator after having passed through the radiator, rearwardly of the radiator.
- the fan shroud of this invention is quite effective for overcoming the disadvantages noted above. That is, with the fan shroud of this invention, air that is going to escape radially of the cooling fan after having passed through the radiator is efficiently deflected rearwardly of the radiator, making it possible to prevent the air that has been heated during its passage through the radiator from being circulated back to the front of the radiator as well as to increase the amount of air to be supplied to the constituent parts of the engine such as the oil pan and the exhaust manifold.
- a fan shroud according to an embodiment of the present invention is indicated at 22 and shown to comprise a ventilation opening 24 and a short cylindrical flange 26 provided to the periphery of the ventilation opening 24 in a manner to project rearwardly therefrom.
- the foregoing structure substantially follows the conventional fashion.
- the fan shroud 22 further comprises an air guide means 28 provided to the rear end of the cylindrical flange 26 for defelcting air that is going to escape radially of the cooling fan 16, rearwardly of the radiator 12.
- the air guide means 28 briefly comprises an air guide ring 30 placed around the cylindrical flange 26 at a predetermined space therebetween. More specifically, the air guide means 28 further comprises an integral annular disc 32 joined at the inner periphery thereof with the rear end of the cylindrical flange 26 and extending radially outwardly toward the outer periphery thereof.
- the air guide ring 30 is truncated cone-shaped and has a smaller diameter end joined with the outer periphery of the annular disc 32 and a larger diameter end located rearwardly of the smaller diameter end.
- the annular disc 32 is partially reduced in width to enable the associated part of the air guide ring 30 to be formed not to project beyond the upper end of the radiator 12.
- the fan shroud 22 is formed into a single piece from a synthetic resinous material by injection molding. That is, the air guide means 28 in the embodiment of Figs. 3 to 5 is formed integral with the remaining part of the fan shroud 22.
- a fan shroud according to the second embodiment of the present invention is generally indicated at 22' and shown to comprise an air guide means 28' including an air guide ring 30' and an annular disc 32' which are integral with each other but formed separately from the cylindrical flange 26' with a view to making the production of the mold and the molding operation easy.
- the separately formed air guide means 28' is bonded at the flanged inner periphery of the annular disc 32' to the outer cylindrical surface of the cylindrical flange 26'.
- a fan shroud according to the third embodiment of the present invention is indicated at 22" and shown to comprise an air guide ring 30" placed around the cylindrical flange 26" at a predetermined space therebetween.
- the air guide ring 30" has a front end joined directly with the fan shroud proper and a rear free end projecting more rearwards than that of the cylindrical flange 26".
- the air guide means 28" is constituted by the air guide ring 30" only, and the fan shroud 22" is formed into a single piece from a synthetic resinous material by injection molding.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- The present invention relates to the cooling of automotive engines and particularly to a fan shroud arranged in the rear of a radiator to increase the cooling system efficiency.
- Figs. 1 and 2 show a typical example of a
fan shroud 10 arranged in the rear of aradiator 12 of a water-cooledautomotive engine 14. Acooling fan 16 is shrouded by thefan shroud 10 to increase the cooling system efficiency. As better seen from Fig. 1, thefan shroud 10 is rectangular in external shape in accordance with the shape of a radiator core (not shown) and has a ventilation opening 18 in which thecooling fan 16 is disposed to draw air through theradiator 12. At the periphery of the ventilation opening 18, thefan shroud 10 is formed with a shortcylindrical flange 20 which is uniform in diameter. - It has been revealed by the experiments conducted by the applicant that the prior art fan shroud is encountered by the following disadvantages. That is, with the above described fan shroud, part of the air that has passed through the
radiator 12 is allowed to flow radially of thecooling fan 16 under the influence of rear obstacles such as the constituent parts of theengine 14, as indicated by the arrows in Fig. 2. The radial airflow is then partially deflected forwardly of the vehicle body and flows through the vehicle body openings such as the openings of a front grille back to the front of the radiator. In this manner, the air that has been heated during its passage through theradiator 12 is partially circulated back to the front of theradiator 12, raising the temperature of air that is going to be drawn into theradiator 12 and reducing the cooling efficiency of theradiator 12. Another disadvantage is that the amount of air to be supplied to the constituent parts of theengine 14 such as an oil pan and an exhaust manifold for cooling same is reduced since part of the air that has passed through theradiator 12 is allowed to flow radially of thecooling fan 16 and thus deflected away from those parts. - In accordance with the present invention, there is provided a novel and improved fan shroud which is arranged in the rear of a radiator of an automotive engine. The fan shroud comprises, as usual, a ventilation opening in which a cooling fan is disposed to draw air through the radiator. In accordance with the present invention, the fan shroud is further provided with an air guide means for deflecting air that is going to escape radially of the radiator after having passed through the radiator, rearwardly of the radiator.
- The fan shroud of this invention is quite effective for overcoming the disadvantages noted above. That is, with the fan shroud of this invention, air that is going to escape radially of the cooling fan after having passed through the radiator is efficiently deflected rearwardly of the radiator, making it possible to prevent the air that has been heated during its passage through the radiator from being circulated back to the front of the radiator as well as to increase the amount of air to be supplied to the constituent parts of the engine such as the oil pan and the exhaust manifold.
- It is accordingly an object of the present invention to provide a novel and improved fan shroud for use with a water-cooled automotive engine which can overcome the above noted disadvantages inherent in the comparable prior art fan shroud.
- It is another object of the present invention to provide a novel and improved fan shroud of the above described character which makes it possible to prevent the air that has been heated during its passage through the radiator from being circulated back to the front of the radiator as well as to increase the amount of air to be supplied to the constituent parts of the engine such as the oil pan and the exhaust manifold.
- It is a further object of the present invention to provide an novel and improved fan shroud of the above described character which effectively increases the cooling system efficiency of an automotive vehicle.
- The features and advantages of the fan shroud according to the present invention will become more clearly appreciated from the following description taken in conjunction with the accompanying drawings, in which:
- Fig. 1 is a perspective view of a prior art fan shroud mounted to the rear of a radiator;
- Fig. 2 is a schematic view of an engine compartment of a vehicle in which the fan shroud of Fig. 1 is installed;
- Fig. 3 is a view similar to Fig. 1 but shows a fan shroud according an embodiment of the present invention;
- Fig. 4 is a horizontal section of the fan shroud of Fig. 3;
- Fig. 5 is a view similar to Fig. 2 but shows an engine compartment in which the fan shroud of Fig. 3 is installed;
- Fig. 6 is a view similar to Fig. 4 but shows a fan shroud according to a second embodiment of the present invention; and
- Fig. 7 is a view similar to Fig. 4 but shows a fan shroud according to the third embodiment of the present invention.
- Referring to Figs. 3 to 5, in which like parts to those of Figs. 1 and 2 are designated by like reference characters, a fan shroud according to an embodiment of the present invention is indicated at 22 and shown to comprise a ventilation opening 24 and a short
cylindrical flange 26 provided to the periphery of the ventilation opening 24 in a manner to project rearwardly therefrom. The foregoing structure substantially follows the conventional fashion. - In accordance with the present invention, the
fan shroud 22 further comprises an air guide means 28 provided to the rear end of thecylindrical flange 26 for defelcting air that is going to escape radially of thecooling fan 16, rearwardly of theradiator 12. The air guide means 28 briefly comprises anair guide ring 30 placed around thecylindrical flange 26 at a predetermined space therebetween. More specifically, the air guide means 28 further comprises an integralannular disc 32 joined at the inner periphery thereof with the rear end of thecylindrical flange 26 and extending radially outwardly toward the outer periphery thereof. Theair guide ring 30 is truncated cone-shaped and has a smaller diameter end joined with the outer periphery of theannular disc 32 and a larger diameter end located rearwardly of the smaller diameter end. - In the illustrated embodiment, as seen from Fig. 3, the
annular disc 32 is partially reduced in width to enable the associated part of theair guide ring 30 to be formed not to project beyond the upper end of theradiator 12. - The
fan shroud 22 is formed into a single piece from a synthetic resinous material by injection molding. That is, the air guide means 28 in the embodiment of Figs. 3 to 5 is formed integral with the remaining part of thefan shroud 22. - Referring to Fig. 6, in which parts are designated by like reference characters as their corresponding parts of the previous embodiment of Figs. 3 to 5, with prime marks added, a fan shroud according to the second embodiment of the present invention is generally indicated at 22' and shown to comprise an air guide means 28' including an air guide ring 30' and an annular disc 32' which are integral with each other but formed separately from the cylindrical flange 26' with a view to making the production of the mold and the molding operation easy. The separately formed air guide means 28' is bonded at the flanged inner periphery of the annular disc 32' to the outer cylindrical surface of the cylindrical flange 26'.
- Referring to Fig. 7, in which parts are designated by like reference characters as their corresponding parts of the embodiment of Figs. 3 to 5, with prime marks added, a fan shroud according to the third embodiment of the present invention is indicated at 22" and shown to comprise an
air guide ring 30" placed around thecylindrical flange 26" at a predetermined space therebetween. Theair guide ring 30" has a front end joined directly with the fan shroud proper and a rear free end projecting more rearwards than that of thecylindrical flange 26". In this embodiment, the air guide means 28" is constituted by theair guide ring 30" only, and thefan shroud 22" is formed into a single piece from a synthetic resinous material by injection molding. - In operation, due to the provision of the air guide means, air that is going to escape radially of the
cooling fan 16 after having passed through theradiator 12 is efficiently deflected rearwardly of theradiator 12 as indicated by the arrows in Fig. 5, making it possible to prevent the air that has been heated during its passage through theradiator 12 from being recirulated back to the front of theradiator 12 as well as to increase the amount of air to be supplied to the constituent parts of the engine such as the oil pan and the exhaust manifold. - Obviously, many variations and modifications of the present invention are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13664181A JPS5838319A (en) | 1981-08-31 | 1981-08-31 | Fan shroud |
JP136641/81 | 1981-08-31 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0073476A2 true EP0073476A2 (en) | 1983-03-09 |
EP0073476A3 EP0073476A3 (en) | 1983-08-10 |
EP0073476B1 EP0073476B1 (en) | 1986-12-17 |
Family
ID=15180054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82107826A Expired EP0073476B1 (en) | 1981-08-31 | 1982-08-25 | Fan shroud |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0073476B1 (en) |
JP (1) | JPS5838319A (en) |
DE (1) | DE3274750D1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2166807A (en) * | 1984-08-30 | 1986-05-14 | Daimler Benz Ag | Air-conveying device for a heat exchanger of a water-cooled internal combustion engine |
WO1989007717A1 (en) * | 1988-02-11 | 1989-08-24 | Robert Bosch Gmbh | Axial fan |
EP1710413A2 (en) | 2005-04-06 | 2006-10-11 | Faurecia Cooling Systems | Duct piece for front part of automotive vehicle, front part and related shroud |
KR101121598B1 (en) * | 2004-04-22 | 2012-03-16 | 셰브론 필립스 케미컬 컴퍼니 엘피 | Method of preparing active cromium/alumina catalysts via treatment with sulfate and polymers produced using the cromium/alumina catalysts |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63314398A (en) * | 1987-06-18 | 1988-12-22 | Matsushita Electric Ind Co Ltd | Blower for electric equipment |
US7331759B1 (en) | 2004-03-04 | 2008-02-19 | Bou-Matic Technologies Corporation | Drying fan |
US8579582B1 (en) | 2006-03-21 | 2013-11-12 | Technologies Holdings Corp. | Efficient drying fan |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3635285A (en) * | 1970-05-11 | 1972-01-18 | Gen Motors Corp | Cooling fan |
US3937192A (en) * | 1974-09-03 | 1976-02-10 | General Motors Corporation | Ejector fan shroud arrangement |
US4061188A (en) * | 1975-01-24 | 1977-12-06 | International Harvester Company | Fan shroud structure |
EP0026997A1 (en) * | 1979-10-09 | 1981-04-15 | General Motors Corporation | Shroud arrangement for engine cooling fan |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5117738A (en) * | 1974-07-31 | 1976-02-12 | Isuzu Motors Ltd | Enjinno reikyakusochi |
-
1981
- 1981-08-31 JP JP13664181A patent/JPS5838319A/en active Pending
-
1982
- 1982-08-25 DE DE8282107826T patent/DE3274750D1/en not_active Expired
- 1982-08-25 EP EP82107826A patent/EP0073476B1/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3635285A (en) * | 1970-05-11 | 1972-01-18 | Gen Motors Corp | Cooling fan |
US3937192A (en) * | 1974-09-03 | 1976-02-10 | General Motors Corporation | Ejector fan shroud arrangement |
US4061188A (en) * | 1975-01-24 | 1977-12-06 | International Harvester Company | Fan shroud structure |
EP0026997A1 (en) * | 1979-10-09 | 1981-04-15 | General Motors Corporation | Shroud arrangement for engine cooling fan |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2166807A (en) * | 1984-08-30 | 1986-05-14 | Daimler Benz Ag | Air-conveying device for a heat exchanger of a water-cooled internal combustion engine |
US4655686A (en) * | 1984-08-30 | 1987-04-07 | Daimler-Benz Aktiengesellschaft | Air conveying device on a radiator for water-cooled internal combustion engines |
WO1989007717A1 (en) * | 1988-02-11 | 1989-08-24 | Robert Bosch Gmbh | Axial fan |
KR101121598B1 (en) * | 2004-04-22 | 2012-03-16 | 셰브론 필립스 케미컬 컴퍼니 엘피 | Method of preparing active cromium/alumina catalysts via treatment with sulfate and polymers produced using the cromium/alumina catalysts |
EP1710413A2 (en) | 2005-04-06 | 2006-10-11 | Faurecia Cooling Systems | Duct piece for front part of automotive vehicle, front part and related shroud |
FR2884182A1 (en) | 2005-04-06 | 2006-10-13 | Faurecia Bloc Avant | PULSE ELEMENT FOR FRONT BLOCK OF MOTOR VEHICLE, FRONT BLOCK AND FAIRING. |
EP1710413A3 (en) * | 2005-04-06 | 2007-11-07 | Faurecia Cooling Systems | Duct piece for front part of automotive vehicle, front part and related shroud |
Also Published As
Publication number | Publication date |
---|---|
EP0073476A3 (en) | 1983-08-10 |
JPS5838319A (en) | 1983-03-05 |
EP0073476B1 (en) | 1986-12-17 |
DE3274750D1 (en) | 1987-01-29 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 19820825 |
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AK | Designated contracting states |
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AK | Designated contracting states |
Designated state(s): DE FR GB |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NISSAN MOTOR CO., LTD. |
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