US3792697A - Cooling fans for liquid-cooled internal combustion engines - Google Patents

Cooling fans for liquid-cooled internal combustion engines Download PDF

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Publication number
US3792697A
US3792697A US00244632A US3792697DA US3792697A US 3792697 A US3792697 A US 3792697A US 00244632 A US00244632 A US 00244632A US 3792697D A US3792697D A US 3792697DA US 3792697 A US3792697 A US 3792697A
Authority
US
United States
Prior art keywords
pulley
thermostat
rod
pressure plate
fan
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.)
Expired - Lifetime
Application number
US00244632A
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English (en)
Inventor
R Walter
W Pitcher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Concentric Pumps Ltd
Original Assignee
Concentric Pumps Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Concentric Pumps Ltd filed Critical Concentric Pumps Ltd
Application granted granted Critical
Publication of US3792697A publication Critical patent/US3792697A/en
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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
    • 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
    • F01P7/087—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 directly by deformation of a thermostatic device
    • 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
    • F16D43/00—Automatic clutches
    • F16D43/02—Automatic clutches actuated entirely mechanically
    • F16D43/25—Automatic clutches actuated entirely mechanically controlled by thermo-responsive elements

Definitions

  • Friction clutch means comprising [30] g fli fft ml Data clutch plates respectively drivingly connected to the July 31, 1971 Great Britain ..36117/7l fa bl nd to the pulley is provided with a pressure plate operable to frictionally engage said clutch [52] US. Cl.
  • a wax cell thermostat is mounted in [5] [11111. Cl F0111) 7/08 the pump impeller for exposure m coolant fluid, and a [58] Flam of 123/4112 41-46; 192/82 rod slidably received in said hollow drive spindle is ax- 192/89 109 A; 236/35? 416/39 169 ially moved therein by expansion and contraction of the thermostat.
  • a part fast with said pulley has a diam- [56] References cued etral bore, and a diametrally extending member is UNITED STATE PAT NT loosely received in said bore and is engageable with 1,820,035 8/1931 Stokes 123 4112 UX said pressure plate. Said rod is engageable with said 2,438,161 3/1948 Greenlee.... 236/35 member, in response to expansion of said thermostat, 2,658,400 11/1953 Dodge 123/41.12 X to displace said member axially and thereby displace 2,651,143 12953 England 192/82 T UX the pressure plate to operate the clutch means. 3,075,691 1/1963 Kelley 192/82 T UX 3,177,852 4/1965 Elmer 123/4112 2 Claims, 4 Drawing Figures 3,221,721 12/1965 Kuze l23/4l.12
  • the fan hub I is journalled This invention relates to cooling fans for liquidy needle rollers 12 on 11 drive hub 14 which itself cooled internal combustion engines particularly of the kind in which coolant is circulated through a heatexchanger matrix and air flow through that matrix is aided by the fan.
  • the object of the invention is to provide an improved device for this purpose.
  • a cooling fan for an internal combustion engine comprises a member supporting a set of fan blades and mounted adjacent a drive transmitting pulley or the like, a pump impeller mounted on a drive spindle fixed to said pulley or the like, a wax cell thermostat mounted in said impeller and exposed for heat transmission from coolant flowing about said impeller, and a rod slidable in the said spindle and adapted to be displaced axially by thermostat action, said rod being connected to the fan blades and actuating a clutch to transmit drive thereto from the pulley or the like, so that said fan is effective only when the rod is displaced by the thermostat.
  • the fan comprises fixed pitch blades mounted on a hub journalled relative to the pulley or the like, and a friction clutch is interposed, comprising a stack of plates which are held together in drive transmitting relation by the displaced rod, and spring released therefrom on cooling of the thermostat and on axial return of the rod.
  • Wax-cell thermostats are well known per se and comprise a capsule, which in use in the present invention will be secured in position in a waterway e.g. in the water pump impeller end face, and a stem which is dis placed axially by the cell as ambient temperature rises.
  • Such cells may be relatively sensitive over relatively narrow ranges, and operate on the increase in volume of the cell contents (usually a wax) when a phase change from solid to liquid of the wax occurs. Hence the stem is displaced at or about the melting point or melting zone of the was.
  • lost motion means may be provided.
  • FIG. 1 is a vertical sectional of the first embodiment, taken on the line ll of FIG. 2;
  • FIG. 2 is a front elevation, with parts omitted, and parts broken away, and on a smaller scale;
  • FIG. 3 is a fragmentary section taken on the line 3-3 of FIG. 2;
  • FIG. 4 is a view generally similar to FIG. ll, but of a second embodiment.
  • a drive member 16 including a pulley I8 or sprocket by which drive is transmitted to the drive hub and can also be transmitted to the fan.
  • a clutch is effective between the fan hub and the pulley or the like. Hence when the clutch is disconnected the drive hub may rotate with the pulley and the fan idle, or the fan may windmill under air pressure, but without absorbing power in its rotation. Portions of two fan blades are shown at 20, these being fixed to hub 10.
  • the clutch comprises a driven plate 22 keyed or splined to the fan hub and loosely sandwiched between a pair of friction plates 24, 26 which may be truly annular or have peripheral lugs engaged in axially extending slots in a ring fast with the puelly or the like so as to be rotatable with the pulley or the like at all times.
  • FIG. 2 shows these plates and their lugs 28.
  • annulus 32 On one side of the stack of plates is an annulus 32, bolted at its rim to the pulley or the like and forming an abutment for the plates stack.
  • clutch pressure plate 34 On the other side of the plates stack is a clutch pressure plate 34, also annular in form, which when displaced may hold the stack lightly together and against the annulus to transmit drive to the fan hub.
  • a cross member 36 Located between the clutch pressure plate 34 and the drive member I6, and extending through a diametric bore in the drive hub is a cross member 36.
  • a drive spindle 40 Fixed to the pulley or the like is a drive spindle 40, which is journalled in a casing 42, and carries at the end opposite to the drive hub, with which it is co-axial, a water pump impeller 44.
  • the thermostat cell 46 In the face of the impeller exposed to coolant water (or the like) is the thermostat cell 46, and the stem 48 of the latter projects within a co-axial bore in the drive spindle.
  • a rod 50 made in two parts separated by a coil spring 52. The stem 48 abuts the rod, and the rod abuts the crossmember, so that expansion of the cell contents displaces the rod to apply pressure to the plates stack.
  • the pressure plate 34 has a number of peripheral lugs 54 which engage throwoff springs 56 trapped between those lugs and annulus 32. These springs are compressed during drive transmission, and extend when thermostat pressure is relaxed, to release the plates stack from pressure.
  • the arrangement is generally similar save for the rod 50 being in one piece, and the fan hub is journalled on an intermediate collar 60 which is axially slidable on the drive hub.
  • the collar incorporates a central screw 62 which is adjustable towards or away from the rod, so as to enable the temperature at which clutch drive begins, to be adjusted to suit requirements, the space between screw and rod (in the extreme position) constituting lost motion before operation.
  • a dished diaphragm or Bell Ville type spring 66 is engaged at its inner periphery with the intermediate member 60 and contacts the pressure plate 34 at its outer periphery, and hence when rod movement (axially) under cell expansion takes the rod and screw into abutment, continued axial movement displaces the spring centre and pressurises the plate stack.
  • This diaphragm spring serves to return the assembly when cooling occurs, the separate throw-off springs are eliminated.
  • a cooling fan and water pump assembly for an internal combustion engine comprising a drive pulley, a hollow drive spindle fast with said pulley and drivingly connected to a pump impeller, a fan assembly mounted for rotation with respect to said pulley and said drive spindle, friction clutch means comprising clutch plates respectively drivingly connected to the fan assembly and to the pulley and a pressure plate operable to frictionally engage said clutch plates and thereby drivingly connect the pulley and the fan assembly, a wax cell thermostat mounted in the pump impeller for exposure to coolant fluid, and a rod slidably received in said hollow drive spindle, which is axially moved therein by expansion and contraction of the thermostat, wherein the improvement comprises a collar which is slidably mounted on a hub that is fast with the drive pulley, an annular diaphragm spring which is carried by said collar and is engageable with said pressure plate, and an axially adjustable element which is carried by said collar, said rod being engageable with said element, in response to expansion of said thermostat, to displace

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00244632A 1971-07-31 1972-04-17 Cooling fans for liquid-cooled internal combustion engines Expired - Lifetime US3792697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3611771 1971-07-31

Publications (1)

Publication Number Publication Date
US3792697A true US3792697A (en) 1974-02-19

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ID=10385137

Family Applications (1)

Application Number Title Priority Date Filing Date
US00244632A Expired - Lifetime US3792697A (en) 1971-07-31 1972-04-17 Cooling fans for liquid-cooled internal combustion engines

Country Status (5)

Country Link
US (1) US3792697A (it)
DE (1) DE2214040A1 (it)
FR (1) FR2149042A5 (it)
GB (1) GB1329044A (it)
IT (1) IT955620B (it)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019722A (en) * 1975-11-28 1977-04-26 Littleford Bros. Inc. High intensity mixer utilizing a single speed motor
US4074663A (en) * 1975-04-23 1978-02-21 Force Control Industries, Inc. Internal combustion engine and cooling fan drive system
US4224841A (en) * 1978-05-31 1980-09-30 Wallace Murray Corporation Multi-speed temperature responsive fan clutch
US4531621A (en) * 1983-12-27 1985-07-30 Eaton Corporation Flow control valve for fluid fan drive
US4681200A (en) * 1981-09-16 1987-07-21 Luk Lamellen Und Kupplungsbau Gmbh Friction clutch
US4868437A (en) * 1988-07-15 1989-09-19 Siemens Energy & Automation, Inc. Temperature activated cooling fan assembly
US5181483A (en) * 1990-04-12 1993-01-26 Harald Mair-Egg Automatically coupling fan for automative cooling systems
GB2408775A (en) * 2003-12-03 2005-06-08 Echlin Do Brasil Ind E Com Ltd Coolant pump with temperature actuated clutch
US7100544B1 (en) * 2005-07-29 2006-09-05 Borgwarner Inc. Pneumatic cone clutch fan drive having threaded attachment method for drive shaft of clutch to hub mounting
US20080072850A1 (en) * 2006-05-31 2008-03-27 Crider James A Compact pump arrangement
WO2008043530A1 (de) * 2006-10-11 2008-04-17 Behr Gmbh & Co. Kg Koppelungsvorrichtung für eine kühlmittelpumpe, verfahren zum koppeln, pumpe zum kühlmittelpumpen
US9347363B2 (en) 2013-02-14 2016-05-24 Cummins Ip, Inc. Fluid pump assembly
US20170096928A1 (en) * 2015-10-05 2017-04-06 Gene Doyle Burt Emergency portable adjustable engine-fan assembly (fan clutch) lock-in device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1820035A (en) * 1928-02-18 1931-08-25 Stokes Charles Lawrence Temperature regulator
US2438161A (en) * 1945-06-22 1948-03-23 Studebaker Corp Temperature control for engines
US2658400A (en) * 1951-08-01 1953-11-10 Adiel Y Dodge Variable fan drive
US2661148A (en) * 1951-04-12 1953-12-01 Schwitzer Cummins Company Thermostatically controlled fan
US2786456A (en) * 1954-11-19 1957-03-26 Thompson Prod Inc Thermostatic fan
US2879755A (en) * 1956-05-02 1959-03-31 Schwitzer Corp Fluid coupling mechanism
US3075691A (en) * 1960-02-08 1963-01-29 Gen Motors Corp Fan clutch
US3177852A (en) * 1962-08-15 1965-04-13 Dowty Hydraulic Units Ltd Drives suitable for operating fans of automotive vehicles
US3221721A (en) * 1963-08-10 1965-12-07 Kuze Yoshikazu Radiator cooling fan clutch

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1820035A (en) * 1928-02-18 1931-08-25 Stokes Charles Lawrence Temperature regulator
US2438161A (en) * 1945-06-22 1948-03-23 Studebaker Corp Temperature control for engines
US2661148A (en) * 1951-04-12 1953-12-01 Schwitzer Cummins Company Thermostatically controlled fan
US2658400A (en) * 1951-08-01 1953-11-10 Adiel Y Dodge Variable fan drive
US2786456A (en) * 1954-11-19 1957-03-26 Thompson Prod Inc Thermostatic fan
US2879755A (en) * 1956-05-02 1959-03-31 Schwitzer Corp Fluid coupling mechanism
US3075691A (en) * 1960-02-08 1963-01-29 Gen Motors Corp Fan clutch
US3177852A (en) * 1962-08-15 1965-04-13 Dowty Hydraulic Units Ltd Drives suitable for operating fans of automotive vehicles
US3221721A (en) * 1963-08-10 1965-12-07 Kuze Yoshikazu Radiator cooling fan clutch

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074663A (en) * 1975-04-23 1978-02-21 Force Control Industries, Inc. Internal combustion engine and cooling fan drive system
US4019722A (en) * 1975-11-28 1977-04-26 Littleford Bros. Inc. High intensity mixer utilizing a single speed motor
US4224841A (en) * 1978-05-31 1980-09-30 Wallace Murray Corporation Multi-speed temperature responsive fan clutch
US4681200A (en) * 1981-09-16 1987-07-21 Luk Lamellen Und Kupplungsbau Gmbh Friction clutch
US4531621A (en) * 1983-12-27 1985-07-30 Eaton Corporation Flow control valve for fluid fan drive
US4868437A (en) * 1988-07-15 1989-09-19 Siemens Energy & Automation, Inc. Temperature activated cooling fan assembly
US5181483A (en) * 1990-04-12 1993-01-26 Harald Mair-Egg Automatically coupling fan for automative cooling systems
GB2408775A (en) * 2003-12-03 2005-06-08 Echlin Do Brasil Ind E Com Ltd Coolant pump with temperature actuated clutch
US7100544B1 (en) * 2005-07-29 2006-09-05 Borgwarner Inc. Pneumatic cone clutch fan drive having threaded attachment method for drive shaft of clutch to hub mounting
US20080072850A1 (en) * 2006-05-31 2008-03-27 Crider James A Compact pump arrangement
US8011899B2 (en) 2006-05-31 2011-09-06 Metaldyne, Llc Compact pump arrangement
WO2008043530A1 (de) * 2006-10-11 2008-04-17 Behr Gmbh & Co. Kg Koppelungsvorrichtung für eine kühlmittelpumpe, verfahren zum koppeln, pumpe zum kühlmittelpumpen
US9347363B2 (en) 2013-02-14 2016-05-24 Cummins Ip, Inc. Fluid pump assembly
US20170096928A1 (en) * 2015-10-05 2017-04-06 Gene Doyle Burt Emergency portable adjustable engine-fan assembly (fan clutch) lock-in device
US9835077B2 (en) * 2015-10-05 2017-12-05 Gene Doyle Burt Emergency portable adjustable engine-fan assembly (fan clutch) lock-in device

Also Published As

Publication number Publication date
IT955620B (it) 1973-09-29
DE2214040A1 (de) 1973-02-08
GB1329044A (en) 1973-09-05
FR2149042A5 (it) 1973-03-23

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