US20090155094A1 - Cooling fan clutch - Google Patents
Cooling fan clutch Download PDFInfo
- Publication number
- US20090155094A1 US20090155094A1 US12/238,084 US23808408A US2009155094A1 US 20090155094 A1 US20090155094 A1 US 20090155094A1 US 23808408 A US23808408 A US 23808408A US 2009155094 A1 US2009155094 A1 US 2009155094A1
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- US
- United States
- Prior art keywords
- housing
- cover
- space
- shaft
- fluid
- 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.)
- Abandoned
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Classifications
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- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D35/00—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion
- F16D35/02—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part
- F16D35/021—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves
- F16D35/024—Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves the valve being actuated electrically, e.g. by an electromagnet
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- 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
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
-
- 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
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
- F01P7/081—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps using clutches, e.g. electro-magnetic or induction clutches
- F01P7/082—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps using clutches, e.g. electro-magnetic or induction clutches using friction clutches
- F01P7/085—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps using clutches, e.g. electro-magnetic or induction clutches using friction clutches actuated by fluid pressure
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- 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
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/10—Controlling of coolant flow the coolant being cooling-air by throttling amount of air flowing through liquid-to-air heat exchangers
- F01P7/12—Controlling of coolant flow the coolant being cooling-air by throttling amount of air flowing through liquid-to-air heat exchangers by thermostatic control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
- F16D48/066—Control of fluid pressure, e.g. using an accumulator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/104—Clutch
- F16D2500/10443—Clutch type
- F16D2500/10468—Fluid adhesion clutch
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/306—Signal inputs from the engine
- F16D2500/3064—Temperature of the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/504—Relating the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
- F16D2500/70422—Clutch parameters
- F16D2500/70424—Outputting a clutch engaged-disengaged signal
Definitions
- the present invention relates to a clutch that controls a cooling fan, such as those used in automobile radiators to maintain a constant coolant temperature.
- a cooling fan cools engine coolant that passes through the radiator.
- the cooling fan rotates quickly, and lowers the temperature of the coolant quickly, if the temperature of the coolant is higher than or equal to a specific temperature.
- the cooling fan rotates slowly, and lowers the temperature of the coolant slowly, if the temperature of the coolant is lower than the specific temperature. Operation of the cooling fan is controlled by a cooling fan clutch.
- the bimetal valve expands or contracts by the temperature of the air, not the coolant, which provides less than ideal responsiveness to coolant temperature.
- the temperature of the coolant may thus quickly rise and the engine may overheat during high-speed travel.
- the fan clutch maintains its operation state for a very long time, fuel mileage may be reduced. Further, since operation time of the cooling fan becomes longer, there may be unnecessary noise.
- a disk-shaped cover has a first toothed portion at a radially outward portion of one side surface thereof.
- a housing is coupled with the cover such that a space is defined therebetween.
- the housing has a second toothed portion at a radially outward portion of one side surface thereof, facing the first toothed portion.
- a shaft is rotatably disposed through a middle portion of the housing.
- a fan is fixedly connected to the housing and rotatable with the housing.
- a rotor is mounted in the space between the cover and the housing, engaged with and rotatable with the shaft, with third and fourth toothed portions at radially outward portions of both side surfaces thereof, engaged with the first and second toothed portions, respectively.
- An operation unit controls an amount of fluid supplied to the space between the cover and the housing to control a frictional force generated between the rotor, the housing, and the cover.
- a control unit controls the operation unit based on a coolant temperature.
- the plate and the electromagnet may be exterior to the housing, and the valve rod may penetrate the housing.
- a bearing may be interposed between the shaft and the electromagnet.
- the control unit may open the valve and supply the fluid to the other portion of the space between the cover and the housing if the coolant temperature is higher than or equal to a predetermined temperature.
- a coolant temperature sensor may be provided for detecting the coolant temperature and transmitting a signal corresponding thereto to the control unit.
- the fluid may be silicon oil.
- FIG. 1 is a partly schematic cross-sectional view of a cooling fan clutch according to an exemplary embodiment of the present invention.
- FIG. 2 is an enlarged view of an operation unit shown in FIG. 1 .
- FIG. 3 is a flowchart showing operation of a cooling fan clutch according to an exemplary embodiment of the present invention.
- the housing 12 has an interior surface 36 at a middle portion thereof, and is coupled with the cover 10 such that a space is formed therebetween.
- a shaft 16 is rotatably disposed in the interior surface 36 , and a second toothed portion 42 is provided at a radially outward portion of one side surface of the housing 12 , opposite the first toothed portion 40 .
- a bearing 18 is interposed between the housing 12 and the shaft 16 , and reduces frictional force therebetween that is generated by relative rotation thereof.
- the fan 20 is fixedly connected to the housing 12 , and rotates together with the housing 12 so as to cool a coolant.
- the operation unit 34 controls the amount of silicon oil supplied to the space between the cover 10 and the housing 12 , and particularly to the toothed portions 40 , 42 , and 38 . If a lot of silicon oil is supplied, the frictional force between the rotor 14 and the housing 12 , and between the rotor 14 and the cover 10 , is large, and rotation speed of the fan 20 is high. If a small amount of silicon oil is supplied, the frictional force between the rotor 14 and the housing 12 , and between the rotor 14 and the cover 10 , is small, and the rotation speed of the fan 20 is low.
- the coolant temperature sensor 130 detects the coolant temperature and transmits a signal corresponding thereto to the engine control unit 100 .
- the engine control unit 100 controls operation of the operation unit 34 based on the coolant temperature. For example, the engine control unit 100 turns an operation switch 110 on or off according to the coolant temperature, and accordingly current is applied to the operation unit or not.
- the operation unit 34 includes an oil storage area 22 , a screen 24 , a valve 30 , an electromagnet 26 , a metal plate 32 , and a valve rod 28 .
- the oil storage area 22 is disposed in the space between the cover 10 and the housing 12 , and the silicon oil is stored in the oil storage area 22 .
- the valve rod 28 is fixedly connected to the valve 30 and the metal plate 32 .
- the valve rod 28 moves the valve 30 to the right, closing the oil passage 44 .
- the valve 30 moves left by pressure of the silicon oil, opening the oil passage 44 .
- the metal plate 32 and the electromagnet 26 are mounted at an exterior of the housing 12 . This arrangement prevents the magnetic force from being affected by the silicon oil.
- a bearing 18 is interposed between the electromagnet 26 and the shaft 16 such that the electromagnet 26 is always stationary, regardless of the rotation of the shaft 16 .
- the silicon oil in the space between the cover 10 and the housing 12 can be returned into the oil storage area 22 in ways that will be apparent to people of ordinary skill in the art based on the teachings herein.
- the engine control unit 100 determines whether the ignition switch 120 is turned on at step S 210 .
- the engine control unit 100 determines whether the coolant temperature is higher than or equal to a predetermined temperature at step S 220 .
- the engine control unit 100 turns on the operation switch 110 and the current is applied to the operation unit 34 at step S 240 .
- the electromagnet 26 generates the magnetic force
- the metal plate 32 moves to the right in the drawings
- the valve 30 closes the oil passage 44 . Therefore, the friction force between the rotor 14 and the housing 12 is small and the rotation of the fan 20 slows down.
- the engine control unit 100 turns off the operation switch 110 and cuts off current supply to the operation unit 34 at step S 230 .
- the electromagnet 26 does not generate a magnetic force
- the valve 30 moves to the left in the drawings by the pressure of the silicon oil, and the valve 30 opens the oil passage 44 . Therefore, the silicon oil is supplied between the rotor 14 and the housing 12 and the friction force between the rotor 14 and the housing 12 is large. Therefore, the rotation of the fan 20 speeds ups.
- Steps S 220 -S 240 repeat until the ignition switch is turned off
- the operation unit is controlled based on coolant temperature, and because the electromagnet generates the magnetic force according to the applied current, operational responsiveness to the coolant temperature is improved over the prior art, improving cooling performance. Therefore, damage to the engine is prevented.
Abstract
A disk-shaped cover has a first toothed portion at one surface thereof. A housing is coupled with the cover such that a space is defined therebetween. The housing has a second toothed portion at one surface thereof, facing the first toothed portion. A shaft is rotatably disposed through a middle portion of the housing. A fan is fixedly connected to the housing and rotatable with the housing. A rotor is mounted in the space between the cover and the housing, engaged with and rotatable with the shaft, with third and fourth toothed portions at both surfaces thereof, engaged with the first and second toothed portions, respectively. An operation unit controls an amount of fluid supplied to the space between the cover and the housing to control a frictional force generated between the rotor, the housing, and the cover. A control unit controls the operation unit based on a coolant temperature.
Description
- This application claims priority to, and the benefit of, Korean Patent Application No. 10-2007-0130422, filed in the Korean Intellectual Property Office on Dec. 13, 2007, the entire contents of which are incorporated herein by reference.
- (a) Field of the Invention
- The present invention relates to a clutch that controls a cooling fan, such as those used in automobile radiators to maintain a constant coolant temperature.
- (b) Description of the Related Art
- Generally, a cooling fan cools engine coolant that passes through the radiator. The cooling fan rotates quickly, and lowers the temperature of the coolant quickly, if the temperature of the coolant is higher than or equal to a specific temperature. The cooling fan rotates slowly, and lowers the temperature of the coolant slowly, if the temperature of the coolant is lower than the specific temperature. Operation of the cooling fan is controlled by a cooling fan clutch.
- A rotor is mounted between a cover and a housing, and the fan is mounted on the housing. Silicon oil is stored in an oil storage area between the cover and the housing, and is supplied by opening or closing the oil storage area. Opening or closing of the oil storage area is controlled by a bimetal valve on the cooling fan clutch, which expands or contracts with temperature of air passing through the radiator to open and close the oil storage area. The silicon oil is supplied, controlling the frictional force between the housing and the rotor to control the speed of the cooling fan.
- The bimetal valve expands or contracts by the temperature of the air, not the coolant, which provides less than ideal responsiveness to coolant temperature. The temperature of the coolant may thus quickly rise and the engine may overheat during high-speed travel. In addition, since the fan clutch maintains its operation state for a very long time, fuel mileage may be reduced. Further, since operation time of the cooling fan becomes longer, there may be unnecessary noise.
- The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
- A disk-shaped cover has a first toothed portion at a radially outward portion of one side surface thereof. A housing is coupled with the cover such that a space is defined therebetween. The housing has a second toothed portion at a radially outward portion of one side surface thereof, facing the first toothed portion. A shaft is rotatably disposed through a middle portion of the housing. A fan is fixedly connected to the housing and rotatable with the housing. A rotor is mounted in the space between the cover and the housing, engaged with and rotatable with the shaft, with third and fourth toothed portions at radially outward portions of both side surfaces thereof, engaged with the first and second toothed portions, respectively. An operation unit controls an amount of fluid supplied to the space between the cover and the housing to control a frictional force generated between the rotor, the housing, and the cover. A control unit controls the operation unit based on a coolant temperature.
- A bearing may be interposed between the shaft and the housing such that the housing can rotate relative to the shaft.
- The operation unit may include: a fluid storage area in a portion of the space between the cover and the housing, for storing the fluid; a screen for fluidly isolating the fluid storage area, with a passage through which the fluid in the fluid storage area can be supplied to another portion of the space between the cover and the housing; and a valve for closing and opening the passage by control of the control unit.
- The operation unit may also include: an electromagnet for receiving current and generating a magnetic force by the control of the control unit; a plate configured to be moved by the magnetic force of the electromagnet; and a valve rod connected to the plate and the valve, and moving the valve according to motion of the plate.
- The plate and the electromagnet may be exterior to the housing, and the valve rod may penetrate the housing.
- A bearing may be interposed between the shaft and the electromagnet. The control unit may open the valve and supply the fluid to the other portion of the space between the cover and the housing if the coolant temperature is higher than or equal to a predetermined temperature.
- A coolant temperature sensor may be provided for detecting the coolant temperature and transmitting a signal corresponding thereto to the control unit.
- The fluid may be silicon oil.
-
FIG. 1 is a partly schematic cross-sectional view of a cooling fan clutch according to an exemplary embodiment of the present invention. -
FIG. 2 is an enlarged view of an operation unit shown inFIG. 1 . -
FIG. 3 is a flowchart showing operation of a cooling fan clutch according to an exemplary embodiment of the present invention. - An exemplary embodiment of the present invention will hereinafter be described in detail with reference to the accompanying drawings.
- As shown in
FIG. 1 , a cooling fan clutch according to an exemplary embodiment of the present invention includes acover 10, ahousing 12, afan 20, arotor 14, anoperation unit 34, anengine control unit 100, and acoolant temperature sensor 130. - The
cover 10 has a disk shape and is provided with a firsttoothed portion 40 at a radially outward portion of one side surface thereof. - The
housing 12 has aninterior surface 36 at a middle portion thereof, and is coupled with thecover 10 such that a space is formed therebetween. Ashaft 16 is rotatably disposed in theinterior surface 36, and a secondtoothed portion 42 is provided at a radially outward portion of one side surface of thehousing 12, opposite thefirst toothed portion 40. Abearing 18 is interposed between thehousing 12 and theshaft 16, and reduces frictional force therebetween that is generated by relative rotation thereof. - The
fan 20 is fixedly connected to thehousing 12, and rotates together with thehousing 12 so as to cool a coolant. - The
rotor 14 is rotatably mounted in the space between thecover 10 and thehousing 12, and a middle portion of therotor 14 is splined to theshaft 16 so as to rotate together with theshaft 16. Third and fourthtoothed portions 38 are provided at both side surfaces (left and right surfaces inFIG. 1 ) of radially outward portions of therotor 14, to intermesh with the first and secondtoothed portions rotor 14 rotates, thehousing 12 and thecover 10 also rotate by frictional force between the first, second, and thirdtoothed portions - The
operation unit 34 controls the amount of silicon oil supplied to the space between thecover 10 and thehousing 12, and particularly to thetoothed portions rotor 14 and thehousing 12, and between therotor 14 and thecover 10, is large, and rotation speed of thefan 20 is high. If a small amount of silicon oil is supplied, the frictional force between therotor 14 and thehousing 12, and between therotor 14 and thecover 10, is small, and the rotation speed of thefan 20 is low. - The
coolant temperature sensor 130 detects the coolant temperature and transmits a signal corresponding thereto to theengine control unit 100. Theengine control unit 100 controls operation of theoperation unit 34 based on the coolant temperature. For example, theengine control unit 100 turns anoperation switch 110 on or off according to the coolant temperature, and accordingly current is applied to the operation unit or not. - In addition, the cooling fan clutch includes a
power source 140 and anignition switch 120. If theignition switch 120 is turned on, thepower source 140 is electrically connected to theoperation switch 110, but if theignition switch 120 is turned off, the electrical connection between thepower source 140 and theoperation switch 110 is cut off. - Referring to
FIG. 2 , theoperation unit 34 includes anoil storage area 22, ascreen 24, avalve 30, anelectromagnet 26, ametal plate 32, and avalve rod 28. - The
oil storage area 22 is disposed in the space between thecover 10 and thehousing 12, and the silicon oil is stored in theoil storage area 22. - The
screen 24 closes off one surface of theoil storage area 22, and is provided with anoil passage 44 through which the silicon oil can be supplied from theoil storage area 22 to the space between thecover 10 and thehousing 12. Thevalve 30 selectively opens and closes theoil passage 44. - The
electromagnet 26 receives a current from thepower source 140 and generates a magnetic force when theengine control unit 100 turns on theoperation switch 110. - The
metal plate 32 is mounted near theelectromagnet 26, and moves left and right inFIG. 2 by the magnetic force of theelectromagnet 26. That is, if theelectromagnet 26 generates the magnetic force, themetal plate 32 moves night. - The
valve rod 28 is fixedly connected to thevalve 30 and themetal plate 32. When themetal plate 32 moves to the right, thevalve rod 28 moves thevalve 30 to the right, closing theoil passage 44. When theelectromagnet 26 does not generate the magnetic force and themetal plate 32 is not pulled to the right, thevalve 30 moves left by pressure of the silicon oil, opening theoil passage 44. - The
metal plate 32 and theelectromagnet 26 are mounted at an exterior of thehousing 12. This arrangement prevents the magnetic force from being affected by the silicon oil. - In addition, a
bearing 18 is interposed between theelectromagnet 26 and theshaft 16 such that theelectromagnet 26 is always stationary, regardless of the rotation of theshaft 16. - The silicon oil in the space between the
cover 10 and thehousing 12 can be returned into theoil storage area 22 in ways that will be apparent to people of ordinary skill in the art based on the teachings herein. - Referring to
FIG. 3 , in operation, theengine control unit 100 determines whether theignition switch 120 is turned on at step S210. - If the
ignition switch 120 is turned on, theengine control unit 100 determines whether the coolant temperature is higher than or equal to a predetermined temperature at step S220. - If the coolant temperature is lower than the predetermined temperature, the
engine control unit 100 turns on theoperation switch 110 and the current is applied to theoperation unit 34 at step S240. In this case, theelectromagnet 26 generates the magnetic force, themetal plate 32 moves to the right in the drawings, and thevalve 30 closes theoil passage 44. Therefore, the friction force between therotor 14 and thehousing 12 is small and the rotation of thefan 20 slows down. - If the coolant temperature is higher than or equal to the predetermined temperature, the
engine control unit 100 turns off theoperation switch 110 and cuts off current supply to theoperation unit 34 at step S230. In this case, theelectromagnet 26 does not generate a magnetic force, thevalve 30 moves to the left in the drawings by the pressure of the silicon oil, and thevalve 30 opens theoil passage 44. Therefore, the silicon oil is supplied between therotor 14 and thehousing 12 and the friction force between therotor 14 and thehousing 12 is large. Therefore, the rotation of thefan 20 speeds ups. - Steps S220-S240 repeat until the ignition switch is turned off
- Because the operation unit is controlled based on coolant temperature, and because the electromagnet generates the magnetic force according to the applied current, operational responsiveness to the coolant temperature is improved over the prior art, improving cooling performance. Therefore, damage to the engine is prevented.
- While this invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (9)
1. An apparatus, comprising:
a cover with a disk shape, comprising a first toothed portion at a radially outward portion of one side surface thereof;
a housing coupled with the cover such that a space is defined therebetween, the housing comprising a second toothed portion at a radially outward portion of one side surface thereof facing the first toothed portion;
a shaft, rotatably disposed through a middle portion of the housing;
a fan fixedly connected to the housing and rotatable with the housing;
a rotor mounted in the space between the cover and the housing, engaged with and rotatable with the shaft, comprising third and fourth toothed portions at radially outward portions of both side surfaces thereof engaged with the first and second toothed portions, respectively;
an operation unit for controlling an amount of fluid supplied to the space between the cover and the housing so as to control a frictional force generated between the rotor, the housing, and the cover; and
a control unit for controlling the operation unit based on a coolant temperature.
2. The apparatus of claim 1 , further comprising a bearing interposed between the shaft and the housing such that the housing can rotate relative to the shaft.
3. The apparatus of claim 1 , wherein the operation unit comprises:
a fluid storage area disposed in a portion of the space between the cover and the housing, for storing the fluid;
a screen for fluidly isolating the fluid storage area, and comprising a passage through which the fluid in the fluid storage area can be supplied to another portion of the space between the cover and the housing; and
a valve for closing and opening the passage by control of the control unit.
4. The apparatus of claim 3 , wherein the operation unit further comprises:
an electromagnet for receiving current and generating a magnetic force by the control of the control unit;
a plate configured to be moved by the magnetic force of the electromagnet; and
a valve rod connected to the plate and the valve, and moving the valve according to motion of the plate.
5. The apparatus of claim 4 , wherein the plate and the electromagnet are exterior to the housing, and the valve rod penetrates the housing.
6. The apparatus of claim 5 , further comprising a bearing interposed between the shaft and the electromagnet.
7. The apparatus of claim 4 , wherein the control unit is configured to open the valve and supply the fluid to the other portion of the space between the cover and the housing if the coolant temperature is higher than or equal to a predetermined temperature.
8. The apparatus of claim 1 , further comprising a coolant temperature sensor for detecting the coolant temperature and transmitting a signal corresponding thereto to the control unit.
9. The apparatus of claim 1 , wherein the fluid comprises silicon oil.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2007-0130422 | 2007-12-13 | ||
KR1020070130422A KR101013962B1 (en) | 2007-12-13 | 2007-12-13 | Cooling fan clutch |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090155094A1 true US20090155094A1 (en) | 2009-06-18 |
Family
ID=40680158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/238,084 Abandoned US20090155094A1 (en) | 2007-12-13 | 2008-09-25 | Cooling fan clutch |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090155094A1 (en) |
KR (1) | KR101013962B1 (en) |
CN (1) | CN101457686A (en) |
DE (1) | DE102008022500A1 (en) |
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KR101349071B1 (en) * | 2012-10-09 | 2014-01-09 | 기아자동차주식회사 | Engine cooling system of vehicle and method for controlling the same |
KR101372451B1 (en) | 2013-02-28 | 2014-03-25 | 영신기전공업(주) | Cooling fan clutch for vehicle |
KR101417660B1 (en) * | 2013-07-11 | 2014-07-09 | 현대자동차주식회사 | Fan clutch for vehicle |
KR101637744B1 (en) * | 2014-11-25 | 2016-07-07 | 현대자동차주식회사 | Fan OFF Speed Decrease Method and Variable Case gap type Fan Clutch therefor |
KR101636213B1 (en) * | 2015-07-07 | 2016-07-05 | 박승병 | Damper and prevention of over torque clutch device |
CN106560598A (en) * | 2016-02-25 | 2017-04-12 | 太仓钰丰机械工程有限公司 | Silicone oil fan clutch with oil quantity indication function |
CN111878440B (en) * | 2020-08-31 | 2022-04-19 | 一汽解放汽车有限公司 | Vehicle and rotation speed control method, device and system of electric control silicone oil fan of vehicle |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4346797A (en) * | 1980-07-25 | 1982-08-31 | Eaton Corporation | Magnetically actuated viscous fluid coupling |
US5992594A (en) * | 1997-12-04 | 1999-11-30 | Behr Gmbh & Co. | Fluid friction clutch |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4353396B2 (en) * | 2002-10-22 | 2009-10-28 | 臼井国際産業株式会社 | Externally controlled fan coupling device |
JP2004340373A (en) * | 2003-04-21 | 2004-12-02 | Usui Kokusai Sangyo Kaisha Ltd | Control method for externally controlled fan clutch |
-
2007
- 2007-12-13 KR KR1020070130422A patent/KR101013962B1/en not_active IP Right Cessation
-
2008
- 2008-05-07 DE DE102008022500A patent/DE102008022500A1/en not_active Withdrawn
- 2008-05-28 CN CNA2008100984912A patent/CN101457686A/en active Pending
- 2008-09-25 US US12/238,084 patent/US20090155094A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4346797A (en) * | 1980-07-25 | 1982-08-31 | Eaton Corporation | Magnetically actuated viscous fluid coupling |
US5992594A (en) * | 1997-12-04 | 1999-11-30 | Behr Gmbh & Co. | Fluid friction clutch |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190128269A1 (en) * | 2017-10-26 | 2019-05-02 | Gary GOTTSCHALK | Automatic control systems for frost fans |
US10753366B2 (en) * | 2017-10-26 | 2020-08-25 | Gary GOTTSCHALK | Automatic control systems for frost fans |
Also Published As
Publication number | Publication date |
---|---|
CN101457686A (en) | 2009-06-17 |
DE102008022500A1 (en) | 2009-06-18 |
KR101013962B1 (en) | 2011-02-14 |
KR20090062934A (en) | 2009-06-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HYUNDAI MOTOR COMPANY, KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEE, HONG BUM;REEL/FRAME:021587/0505 Effective date: 20080918 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |