US20140023477A1 - Combination pump assembly and method of use - Google Patents
Combination pump assembly and method of use Download PDFInfo
- Publication number
- US20140023477A1 US20140023477A1 US13/553,123 US201213553123A US2014023477A1 US 20140023477 A1 US20140023477 A1 US 20140023477A1 US 201213553123 A US201213553123 A US 201213553123A US 2014023477 A1 US2014023477 A1 US 2014023477A1
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- United States
- Prior art keywords
- coolant
- pump
- vacuum pump
- vacuum
- housing
- 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
- F01P5/04—Pump-driving arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/06—Endless member is a belt
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
- F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
Definitions
- the present disclosure relates to a pump assembly and, more particularly, relates to a combination pump assembly that includes a vacuum pump and a coolant pump.
- Vehicles such as cars, trucks, vans, etc. often include a vacuum pump for providing suction to other systems.
- power brake systems often include a brake booster, and the vacuum pump provides suction to the brake booster such that the brake booster can operatively assist the driver in applying braking force to the vehicle.
- vehicles often include a coolant system, which includes a radiator, a water pump, and plumbing that fluidly and operatively connects the radiator and water pump.
- the plumbing includes sections that extend through the engine block.
- the water pump pumps coolant cyclically through the engine, radiator, and back to the water pump. Accordingly, heat moves from the engine block into the coolant, the heat can be removed from the system via the radiator, and this cooling cycle can repeat continuously during flow of the coolant.
- a combination pump assembly for circulation of a coolant and for providing suction includes a shaft that is rotatable and a coolant pump portion with a coolant pump housing that defines at least a portion of a coolant flow path.
- the coolant pump portion also includes a coolant pump member that is rotatably disposed within the coolant pump housing.
- the coolant pump member is operably coupled to the shaft to be driven in rotation by the shaft to pump the coolant through the coolant flow path.
- the pump assembly includes a vacuum pump portion with a vacuum pump housing that defines at least a portion of a suction path.
- the vacuum pump portion also includes a vacuum pump member that is rotatably disposed within the vacuum pump housing. The vacuum pump member is operably coupled to the shaft to be driven in rotation by the shaft to provide suction through the suction path.
- a method of simultaneously pumping a coolant through a coolant flow path and providing suction through a suction path includes providing a shaft.
- the method also includes providing a coolant pump portion with a coolant pump housing that defines at least a portion of the coolant flow path.
- the coolant pump portion also includes a coolant pump member that is rotatably disposed within the coolant pump housing.
- the coolant pump member is operably coupled to the shaft.
- the method includes providing a vacuum pump portion with a vacuum pump housing that defines at least a portion of a suction path.
- the vacuum pump portion also includes a vacuum pump member that is rotatably disposed within the vacuum pump housing.
- the vacuum pump member is operably coupled to the shaft.
- the method includes drivingly rotating the shaft to simultaneously rotate the coolant pump member and the vacuum pump member to simultaneously pump the coolant through the coolant flow path and provide suction through the suction path.
- FIG. 1 is a perspective view of a combination pump assembly according to exemplary embodiments of the present disclosure
- FIG. 2 is a section view taken along the line 2 - 2 of FIG. 1 ;
- FIG. 3 is an exploded view of the combination pump assembly of FIG. 1 ;
- FIG. 4 is a section view of an exhaust path taken along the line 4 - 4 of FIG. 1 ;
- FIG. 5 is a lubricant inlet path taken along the line 5 - 5 of FIG. 1 ;
- FIG. 6 is an end view of an interior of a vacuum pump portion of the combination pump assembly of FIG. 1 ;
- FIG. 7 is a perspective view of a suction path of the combination pump assembly shown with portions removed.
- FIG. 8 is a perspective view of the exhaust flow path of the combination pump assembly shown with portions removed.
- the pump assembly 10 can include a coolant pump portion 14 and a vacuum pump portion 16 , which are operably coupled together in a manner to be discussed.
- the pump assembly 10 can include a common shaft 18 with a first end 17 and a second end 19 ( FIGS. 2 and 3 ).
- a pulley 20 can be mounted to the first end 17 of the shaft 18 .
- the coolant pump portion 14 can be operably mounted to the second end 19 of the shaft 18 to be drivingly rotated by the shaft 18 .
- the vacuum pump portion 16 can be operably mounted to the shaft 18 to be drivingly rotated by the shaft 18 .
- the pump assembly 10 can be incorporated within a vehicle, such as a car, truck, van, etc. to pump various fluids for operation of systems within the vehicle.
- a belt (not shown) or other coupling can rotatably couple a crankshaft (not shown) of an engine 12 to the pulley 20 such that the crankshaft drives the pulley 20 and, thus, the shaft 18 in rotation.
- Rotation of the shaft 18 can rotatably drive the coolant pump portion 14 and the vacuum pump portion 16 for simultaneous operation thereof.
- the coolant pump portion 14 can pump a coolant (e.g., antifreeze, etc.) through a coolant flow path 26 ( FIG.
- the vacuum pump portion 16 can provide suction to another system (i.e., a vacuum-consuming system) of the vehicle via a suction flow path 50 ( FIG. 7 ).
- the vacuum pump portion 16 can provide suction to a brake booster 55 ( FIG. 1 ) for operation of a power brake system (brake-assist system) of the vehicle.
- the coolant flow path 26 can be fluidly disconnected from the suction flow path 50 .
- the pump assembly 10 can be very compact and efficient. Thus, the pump assembly 10 is unlikely to interfere with surrounding structures and systems.
- the pump assembly 10 can be incorporated in a machine other than a vehicle and/or vehicle engine 12 .
- the pump assembly 10 can be operably coupled to any type of engine 12 , such as an internal combustion engine (gasoline or diesel).
- the vacuum pump portion 16 can provide suction to the brake booster 55 , or another type of vacuum-consuming system (e.g., a waste gate for a turbo system, etc.).
- the pump portion 14 can pump any fluid in any type of fluid system other than a coolant cycle and/or the shaft 18 can be used to driving rotate any additional components (e.g., an alternator, etc.).
- the coolant pump portion 14 can include a coolant pump housing 22 .
- the coolant pump housing 22 can be generally L-shaped and can be made out of metal.
- the coolant pump housing 22 can include a mounting portion 24 for mounting directly to the engine 12 (e.g., via bolts or other fasteners).
- the coolant pump housing 22 can further include a bore 25 extending therethrough.
- a bearing 27 which is mounted on the shaft 18 , can be received in the bore 25 and can operably attach to an inner diameter surface 29 of the bore 25 to support the shaft 18 and to allow the shaft 18 to rotate relative to the coolant pump housing 22 .
- the coolant pump housing 22 can also at least partially define the coolant flow path 26 . More specifically, the coolant flow path 26 can include one or more inlets 28 a , 28 b . The inlet 28 a can be fluidly connected to the radiator 32 , and the inlet 28 b can be fluidly connected to the heater core 33 .
- the coolant flow path 26 can continue through the coolant pump housing 22 and can include a chamber 31 ( FIGS. 2 and 4 ) in which a coolant pumping member 34 is disposed.
- the chamber 31 is defined cooperatively by a recess in the coolant pump housing 22 and an outer surface of the engine 12 , and the coolant pumping member 34 is housed between the coolant pump housing 22 and the engine 12 within the chamber 31 .
- the coolant pumping member 34 can be a propeller 36 that is fixed for rotation on the second end 19 of the shaft 18 .
- rotation of the shaft 18 can drivingly rotate the propeller 36 to suck coolant through the inlet(s) 28 a , 28 b into the chamber 31 and propel the coolant out of an outlet 30 to flow into the engine 12 .
- the coolant can then flow through the engine to cool the engine block, the combustion chambers, and/or the cylinder head of the engine 12 .
- the coolant can flow from the engine 12 and through the radiator 32 and/or heater core 33 for heat exchange with ambient air, and the coolant can then return back to the coolant pump portion 14 of the pump assembly 10 for additional pumping.
- one or more thermostats can be included for regulating flow through these components.
- the vacuum pump portion 16 of the pump assembly 10 can include a vacuum pump housing 38 that houses a vacuum pump member 39 ( FIGS. 2 and 3 ).
- the vacuum pump member 39 can be mounted on the shaft 18 for rotation therewith relative to the vacuum pump housing 38 .
- the vacuum pump housing 38 can include a first housing member 40 and a second housing member 42 that attach together to cooperatively enclose the vacuum pump member 39 .
- the first housing member 40 can be cup-shaped.
- the first housing member 40 can include an inner diameter surface 41 .
- the first housing member 40 can include one or more projections 43 that project radially from an outer radial edge thereof.
- the second housing member 42 can be relatively flat with a mounting portion 45 ( FIG. 3 ) along its outer radial edge.
- fasteners e.g., bolts, etc.
- fasteners can extend through the projections 43 in the first housing member 40 and can fasten to the second housing member 42 .
- fasteners e.g., bolts, etc.
- a seal 53 FIG. 3
- the shaft 18 can extend through respective holes in the first and second housing members 40 , 42 such that the shaft 18 can rotate relative to the vacuum pump housing 38 .
- the coolant pump housing 22 can be fixed directly to the engine 12 , and as stated, the vacuum pump housing 38 can be fixed directly to the coolant pump housing 22 . As such, the coolant pump housing 22 can be disposed between the engine 12 and the vacuum pump housing 38 , and the vacuum pump housing 38 can be only indirectly mounted to the engine 12 via the coolant pump housing 22 .
- the vacuum pump member 39 can include various features of a known, commercially available vane pump.
- the vacuum pump member 39 can include a rotor 44 and one or more vanes 46 .
- the vacuum pump member 39 can also include a seal 51 ( FIG. 3 ), such as an O-ring that is disposed between the rotor 44 and the first housing member 40 .
- the rotor 44 can be annular-shaped with a bore 48 extending therethrough.
- the shaft 18 can be received within the bore 48 , and the rotor 44 can be fixed to the shaft 18 for rotation therewith.
- the vanes 46 can be spaced about the circumference of the rotor 44 , and the vanes 46 can move radially relative to the rotor 44 (i.e., can radially extend and radially retract relative to the rotor 44 ) as shown in FIG. 6 .
- the rotor 44 can be eccentrically mounted within the vacuum pump housing 38 (i.e., the axis of rotation of the rotor 44 can be offset relative to the axis of the housing 38 ).
- a crescent-shaped pump chamber 57 can be defined between the rotor 44 and the inner diameter surface 41 of the first housing member 40 .
- the vanes 46 can extend radially outward from the rotor 44 to contact and seal against the inner diameter surface 41 of the first housing member 40 .
- the vanes 46 can cyclically radially project and radially retract relative to the rotor 44 . This action can cause a low pressure area (i.e., a suction area 47 ) and a high pressure area (i.e., an exhaust area 49 ) to be defined at opposite circumferential ends of the pump chamber 57 .
- the suction flow path 50 can be in fluid communication with the brake booster 55 ( FIG. 1 ) or another device that relies on suction for operation.
- the suction flow path 50 can be a fluid channel defined between the brake booster 55 and the suction area 47 of the pump chamber 57 .
- FIGS. 1 and 7 illustrate embodiments of the suction flow path 50 .
- the suction flow path 50 can include a first vacuum inlet portion 52 that is defined by bores that extend through the coolant pump housing 22 .
- the first vacuum inlet portion 52 can be defined through a nipple 54 that projects from the coolant pump housing 22 .
- the brake booster 55 can be fluidly connected (e.g., by a hose or other conduit) to the first vacuum inlet portion 52 via the nipple 54 .
- the suction flow path 50 can also include a second vacuum inlet portion 56 that is defined by bores that extend through the vacuum pump housing 38 .
- the second vacuum inlet portion 56 can be fluidly connected at one end to the first vacuum inlet portion 52 and at the opposite end to the suction area 47 of the pump chamber 57 .
- a check valve 58 can be operably disposed within the suction flow path 50 . As shown, the check valve 58 can be disposed at the intersection of the first and second vacuum inlet portions 52 , 56 . Thus, the check valve 58 can allow fluid flow in only one direction through the suction flow path 50 (i.e., toward the vacuum pump member 39 ).
- a fluid e.g., air
- the vacuum pump member 39 can supply a vacuum to the brake booster 55
- the brake booster 55 can provide braking assistance in the associated power brake system.
- a lubricant inlet path 60 can also be defined in the pump assembly 10 to provide a lubricant to the vacuum pump member 39 .
- the lubricant inlet path 60 includes a first lubricant inlet portion 62 that is defined by bores that extend through the coolant pump housing 22 .
- the lubricant inlet path 60 can also include a second lubricant inlet portion 64 that is defined by bores that extend through the vacuum pump housing 38 .
- the first lubricant inlet portion 62 can be in fluid communication with a lubricant chamber 63 within the engine 12 at one end, and the first lubricant inlet portion 62 can be in fluid communication with the second lubricant inlet portion 64 at an opposite end. Also, the second lubricant inlet portion 64 can be in fluid communication with oil feed holes 65 ( FIG. 6 ) formed within the rotor 44 . Thus, lubricant can move from the lubricant chamber 63 , through the first lubricant inlet portion 62 , through the second lubricant inlet portion 64 , and into the pump chamber 57 via the oil feed holes 65 during operation of the vacuum pump member 39 .
- a vacuum exhaust path 66 can be defined in the pump assembly 10 for exhausting a combination of the fluid (e.g., air) sucked through the suction flow path 50 and the lubricant (e.g., oil) sucked through the lubricant inlet path 60 .
- the vacuum exhaust path 66 can include a first exhaust portion 68 that is defined by bores extending through the vacuum pump housing 38 .
- the vacuum exhaust path 66 can also include a second exhaust portion 70 that is defined by bores extending through the coolant pump housing 22 .
- the first exhaust portion 68 can be fluidly coupled at one end to the exhaust area 49 of the pump chamber 57 ( FIG. 6 ) and at an opposite end to the second exhaust portion 70 .
- the second exhaust portion 70 can be fluidly coupled at the opposite end to the lubricant chamber 63 within the engine 12 . Accordingly, air that is sucked into the vacuum pump chamber 57 via the suction flow path 50 can mix with the lubricant that is sucked into the vacuum pump chamber 57 via the lubricant inlet path 60 , and this air/lubricant mixture can be exhausted back to the lubricant chamber 63 within the engine via the vacuum exhaust path 66 as the vacuum pump member 39 operates.
- the crankshaft (not shown) can drive a belt (not shown) that drivingly rotates the pulley 20 to drivingly rotate the shaft 18 .
- the shaft 18 thus, rotates the rotor 44 of the vacuum pump member 39 to provide suction to the brake booster 55 , to suck lubricant into the vacuum pump member 39 , and to exhaust the air/lubricant mixture from the vacuum pump portion 16 .
- the rotation of the shaft 18 can drivingly rotate the propeller 36 of the coolant pump portion 14 to pump coolant through the coolant flow path 26 .
- the vacuum pump portion 16 and the coolant pump portion 14 can be joined and integrated such that the assembly 10 is very compact. Also, the shaft 18 and pulley 20 can be common to both the vacuum pump portion 16 and the coolant pump portion 14 for driving both. Thus, the assembly 10 can operate very efficiently.
Abstract
Description
- The present disclosure relates to a pump assembly and, more particularly, relates to a combination pump assembly that includes a vacuum pump and a coolant pump.
- Vehicles, such as cars, trucks, vans, etc. often include a vacuum pump for providing suction to other systems. For instance, power brake systems often include a brake booster, and the vacuum pump provides suction to the brake booster such that the brake booster can operatively assist the driver in applying braking force to the vehicle.
- Also, vehicles often include a coolant system, which includes a radiator, a water pump, and plumbing that fluidly and operatively connects the radiator and water pump. The plumbing includes sections that extend through the engine block. The water pump pumps coolant cyclically through the engine, radiator, and back to the water pump. Accordingly, heat moves from the engine block into the coolant, the heat can be removed from the system via the radiator, and this cooling cycle can repeat continuously during flow of the coolant.
- A combination pump assembly for circulation of a coolant and for providing suction is disclosed. The combination pump assembly includes a shaft that is rotatable and a coolant pump portion with a coolant pump housing that defines at least a portion of a coolant flow path. The coolant pump portion also includes a coolant pump member that is rotatably disposed within the coolant pump housing. The coolant pump member is operably coupled to the shaft to be driven in rotation by the shaft to pump the coolant through the coolant flow path. Furthermore, the pump assembly includes a vacuum pump portion with a vacuum pump housing that defines at least a portion of a suction path. The vacuum pump portion also includes a vacuum pump member that is rotatably disposed within the vacuum pump housing. The vacuum pump member is operably coupled to the shaft to be driven in rotation by the shaft to provide suction through the suction path.
- Additionally, a method of simultaneously pumping a coolant through a coolant flow path and providing suction through a suction path is disclosed. The method includes providing a shaft. The method also includes providing a coolant pump portion with a coolant pump housing that defines at least a portion of the coolant flow path. The coolant pump portion also includes a coolant pump member that is rotatably disposed within the coolant pump housing. The coolant pump member is operably coupled to the shaft. Furthermore, the method includes providing a vacuum pump portion with a vacuum pump housing that defines at least a portion of a suction path. The vacuum pump portion also includes a vacuum pump member that is rotatably disposed within the vacuum pump housing. The vacuum pump member is operably coupled to the shaft. Additionally, the method includes drivingly rotating the shaft to simultaneously rotate the coolant pump member and the vacuum pump member to simultaneously pump the coolant through the coolant flow path and provide suction through the suction path.
- Further areas of applicability of the teachings of the present disclosure will become apparent from the detailed description, claims and the drawings provided hereinafter, wherein like reference numerals refer to like features throughout the several views of the drawings. It should be understood that the detailed description, including disclosed embodiments and drawings referenced therein, are merely exemplary in nature intended for purposes of illustration only and are not intended to limit the scope of the present disclosure, its application or uses. Thus, variations that do not depart from the gist of the present disclosure are intended to be within the scope of the present disclosure.
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FIG. 1 is a perspective view of a combination pump assembly according to exemplary embodiments of the present disclosure; -
FIG. 2 is a section view taken along the line 2-2 ofFIG. 1 ; -
FIG. 3 is an exploded view of the combination pump assembly ofFIG. 1 ; -
FIG. 4 is a section view of an exhaust path taken along the line 4-4 ofFIG. 1 ; -
FIG. 5 is a lubricant inlet path taken along the line 5-5 ofFIG. 1 ; -
FIG. 6 is an end view of an interior of a vacuum pump portion of the combination pump assembly ofFIG. 1 ; -
FIG. 7 is a perspective view of a suction path of the combination pump assembly shown with portions removed; and -
FIG. 8 is a perspective view of the exhaust flow path of the combination pump assembly shown with portions removed. - Referring initially to
FIGS. 1-3 , acombination pump assembly 10 is illustrated according to various exemplary embodiments of the present disclosure. Generally, thepump assembly 10 can include acoolant pump portion 14 and avacuum pump portion 16, which are operably coupled together in a manner to be discussed. Also, thepump assembly 10 can include acommon shaft 18 with afirst end 17 and a second end 19 (FIGS. 2 and 3 ). Apulley 20 can be mounted to thefirst end 17 of theshaft 18. Moreover, thecoolant pump portion 14 can be operably mounted to thesecond end 19 of theshaft 18 to be drivingly rotated by theshaft 18. Additionally, thevacuum pump portion 16 can be operably mounted to theshaft 18 to be drivingly rotated by theshaft 18. - The
pump assembly 10 can be incorporated within a vehicle, such as a car, truck, van, etc. to pump various fluids for operation of systems within the vehicle. Specifically, a belt (not shown) or other coupling can rotatably couple a crankshaft (not shown) of anengine 12 to thepulley 20 such that the crankshaft drives thepulley 20 and, thus, theshaft 18 in rotation. Rotation of theshaft 18 can rotatably drive thecoolant pump portion 14 and thevacuum pump portion 16 for simultaneous operation thereof. As a result, thecoolant pump portion 14 can pump a coolant (e.g., antifreeze, etc.) through a coolant flow path 26 (FIG. 4 ) between theengine 12, aradiator 32, and/or aheater core 33 to thereby cool theengine 12, etc. At the same time, thevacuum pump portion 16 can provide suction to another system (i.e., a vacuum-consuming system) of the vehicle via a suction flow path 50 (FIG. 7 ). For instance, in some embodiments, thevacuum pump portion 16 can provide suction to a brake booster 55 (FIG. 1 ) for operation of a power brake system (brake-assist system) of the vehicle. It will be appreciated that thecoolant flow path 26 can be fluidly disconnected from thesuction flow path 50. - Accordingly, as will be discussed, the
pump assembly 10 can be very compact and efficient. Thus, thepump assembly 10 is unlikely to interfere with surrounding structures and systems. - It will be appreciated that the
pump assembly 10 can be incorporated in a machine other than a vehicle and/orvehicle engine 12. Also, thepump assembly 10 can be operably coupled to any type ofengine 12, such as an internal combustion engine (gasoline or diesel). Furthermore, thevacuum pump portion 16 can provide suction to thebrake booster 55, or another type of vacuum-consuming system (e.g., a waste gate for a turbo system, etc.). Likewise, thepump portion 14 can pump any fluid in any type of fluid system other than a coolant cycle and/or theshaft 18 can be used to driving rotate any additional components (e.g., an alternator, etc.). - Referring now to
FIGS. 2 and 3 , thecoolant pump portion 14 will be discussed in detail. As shown, thecoolant pump portion 14 can include acoolant pump housing 22. Thecoolant pump housing 22 can be generally L-shaped and can be made out of metal. Thecoolant pump housing 22 can include amounting portion 24 for mounting directly to the engine 12 (e.g., via bolts or other fasteners). Thecoolant pump housing 22 can further include abore 25 extending therethrough. Abearing 27, which is mounted on theshaft 18, can be received in thebore 25 and can operably attach to aninner diameter surface 29 of thebore 25 to support theshaft 18 and to allow theshaft 18 to rotate relative to thecoolant pump housing 22. - As shown in
FIGS. 1 , 2, and 4, thecoolant pump housing 22 can also at least partially define thecoolant flow path 26. More specifically, thecoolant flow path 26 can include one ormore inlets inlet 28 a can be fluidly connected to theradiator 32, and theinlet 28 b can be fluidly connected to theheater core 33. Thecoolant flow path 26 can continue through thecoolant pump housing 22 and can include a chamber 31 (FIGS. 2 and 4 ) in which acoolant pumping member 34 is disposed. In the embodiments illustrated, thechamber 31 is defined cooperatively by a recess in thecoolant pump housing 22 and an outer surface of theengine 12, and thecoolant pumping member 34 is housed between thecoolant pump housing 22 and theengine 12 within thechamber 31. In some embodiments, thecoolant pumping member 34 can be apropeller 36 that is fixed for rotation on thesecond end 19 of theshaft 18. Thus, rotation of theshaft 18 can drivingly rotate thepropeller 36 to suck coolant through the inlet(s) 28 a, 28 b into thechamber 31 and propel the coolant out of anoutlet 30 to flow into theengine 12. The coolant can then flow through the engine to cool the engine block, the combustion chambers, and/or the cylinder head of theengine 12. Subsequently, the coolant can flow from theengine 12 and through theradiator 32 and/orheater core 33 for heat exchange with ambient air, and the coolant can then return back to thecoolant pump portion 14 of thepump assembly 10 for additional pumping. It will be appreciated that one or more thermostats (not shown) can be included for regulating flow through these components. - Next, referring to
FIGS. 1-6 , thevacuum pump portion 16 of thepump assembly 10 will be discussed in detail. Thevacuum pump portion 16 can include avacuum pump housing 38 that houses a vacuum pump member 39 (FIGS. 2 and 3 ). Thevacuum pump member 39 can be mounted on theshaft 18 for rotation therewith relative to thevacuum pump housing 38. - The
vacuum pump housing 38 can include afirst housing member 40 and asecond housing member 42 that attach together to cooperatively enclose thevacuum pump member 39. Thefirst housing member 40 can be cup-shaped. Also, thefirst housing member 40 can include aninner diameter surface 41. Still further, as shown inFIG. 3 , thefirst housing member 40 can include one ormore projections 43 that project radially from an outer radial edge thereof. Additionally, thesecond housing member 42 can be relatively flat with a mounting portion 45 (FIG. 3 ) along its outer radial edge. To assemble thehousing 38, fasteners (e.g., bolts, etc.) can extend through theprojections 43 in thefirst housing member 40 and can fasten to thesecond housing member 42. Also, fasteners (e.g., bolts, etc.) can extend through the mountingportion 45 of thesecond housing member 42 to attach to the exterior of thecoolant pump housing 22. A seal 53 (FIG. 3 ), such as an O-ring, can be included for sealing thesecond housing member 42 to thecoolant pump housing 22. Theshaft 18 can extend through respective holes in the first andsecond housing members shaft 18 can rotate relative to thevacuum pump housing 38. - Also, as mentioned above, the
coolant pump housing 22 can be fixed directly to theengine 12, and as stated, thevacuum pump housing 38 can be fixed directly to thecoolant pump housing 22. As such, thecoolant pump housing 22 can be disposed between theengine 12 and thevacuum pump housing 38, and thevacuum pump housing 38 can be only indirectly mounted to theengine 12 via thecoolant pump housing 22. - As shown in
FIGS. 3 and 6 , thevacuum pump member 39 can include various features of a known, commercially available vane pump. Thus, thevacuum pump member 39 can include arotor 44 and one ormore vanes 46. Thevacuum pump member 39 can also include a seal 51 (FIG. 3 ), such as an O-ring that is disposed between therotor 44 and thefirst housing member 40. - The
rotor 44 can be annular-shaped with abore 48 extending therethrough. Theshaft 18 can be received within thebore 48, and therotor 44 can be fixed to theshaft 18 for rotation therewith. Additionally, thevanes 46 can be spaced about the circumference of therotor 44, and thevanes 46 can move radially relative to the rotor 44 (i.e., can radially extend and radially retract relative to the rotor 44) as shown inFIG. 6 . - More specifically as shown in
FIG. 6 , therotor 44 can be eccentrically mounted within the vacuum pump housing 38 (i.e., the axis of rotation of therotor 44 can be offset relative to the axis of the housing 38). As such, a crescent-shapedpump chamber 57 can be defined between therotor 44 and theinner diameter surface 41 of thefirst housing member 40. Thevanes 46 can extend radially outward from therotor 44 to contact and seal against theinner diameter surface 41 of thefirst housing member 40. As therotor 44 rotates with theshaft 18, thevanes 46 can cyclically radially project and radially retract relative to therotor 44. This action can cause a low pressure area (i.e., a suction area 47) and a high pressure area (i.e., an exhaust area 49) to be defined at opposite circumferential ends of thepump chamber 57. - As stated above, the
suction flow path 50 can be in fluid communication with the brake booster 55 (FIG. 1 ) or another device that relies on suction for operation. Thesuction flow path 50 can be a fluid channel defined between thebrake booster 55 and thesuction area 47 of thepump chamber 57.FIGS. 1 and 7 illustrate embodiments of thesuction flow path 50. As shown, thesuction flow path 50 can include a firstvacuum inlet portion 52 that is defined by bores that extend through thecoolant pump housing 22. Also, the firstvacuum inlet portion 52 can be defined through anipple 54 that projects from thecoolant pump housing 22. Thebrake booster 55 can be fluidly connected (e.g., by a hose or other conduit) to the firstvacuum inlet portion 52 via thenipple 54. Thesuction flow path 50 can also include a secondvacuum inlet portion 56 that is defined by bores that extend through thevacuum pump housing 38. The secondvacuum inlet portion 56 can be fluidly connected at one end to the firstvacuum inlet portion 52 and at the opposite end to thesuction area 47 of thepump chamber 57. - Also, a
check valve 58 can be operably disposed within thesuction flow path 50. As shown, thecheck valve 58 can be disposed at the intersection of the first and secondvacuum inlet portions check valve 58 can allow fluid flow in only one direction through the suction flow path 50 (i.e., toward the vacuum pump member 39). - Accordingly, as the
rotor 44 rotates and thevanes 46 actuate, a fluid (e.g., air) can be sucked from thebrake booster 55, into the firstvacuum inlet portion 52, and through the secondvacuum inlet portion 56 to thesuction area 47 of thepump chamber 57. As such, thevacuum pump member 39 can supply a vacuum to thebrake booster 55, and thebrake booster 55 can provide braking assistance in the associated power brake system. - As shown in
FIG. 5 , alubricant inlet path 60 can also be defined in thepump assembly 10 to provide a lubricant to thevacuum pump member 39. In the embodiments illustrated, thelubricant inlet path 60 includes a firstlubricant inlet portion 62 that is defined by bores that extend through thecoolant pump housing 22. Thelubricant inlet path 60 can also include a secondlubricant inlet portion 64 that is defined by bores that extend through thevacuum pump housing 38. The firstlubricant inlet portion 62 can be in fluid communication with alubricant chamber 63 within theengine 12 at one end, and the firstlubricant inlet portion 62 can be in fluid communication with the secondlubricant inlet portion 64 at an opposite end. Also, the secondlubricant inlet portion 64 can be in fluid communication with oil feed holes 65 (FIG. 6 ) formed within therotor 44. Thus, lubricant can move from thelubricant chamber 63, through the firstlubricant inlet portion 62, through the secondlubricant inlet portion 64, and into thepump chamber 57 via the oil feed holes 65 during operation of thevacuum pump member 39. - Still further, as shown in
FIGS. 4 and 8 , avacuum exhaust path 66 can be defined in thepump assembly 10 for exhausting a combination of the fluid (e.g., air) sucked through thesuction flow path 50 and the lubricant (e.g., oil) sucked through thelubricant inlet path 60. Thevacuum exhaust path 66 can include afirst exhaust portion 68 that is defined by bores extending through thevacuum pump housing 38. Thevacuum exhaust path 66 can also include asecond exhaust portion 70 that is defined by bores extending through thecoolant pump housing 22. Thefirst exhaust portion 68 can be fluidly coupled at one end to theexhaust area 49 of the pump chamber 57 (FIG. 6 ) and at an opposite end to thesecond exhaust portion 70. Thesecond exhaust portion 70 can be fluidly coupled at the opposite end to thelubricant chamber 63 within theengine 12. Accordingly, air that is sucked into thevacuum pump chamber 57 via thesuction flow path 50 can mix with the lubricant that is sucked into thevacuum pump chamber 57 via thelubricant inlet path 60, and this air/lubricant mixture can be exhausted back to thelubricant chamber 63 within the engine via thevacuum exhaust path 66 as thevacuum pump member 39 operates. - Accordingly, when the
engine 12 is running, the crankshaft (not shown) can drive a belt (not shown) that drivingly rotates thepulley 20 to drivingly rotate theshaft 18. Theshaft 18, thus, rotates therotor 44 of thevacuum pump member 39 to provide suction to thebrake booster 55, to suck lubricant into thevacuum pump member 39, and to exhaust the air/lubricant mixture from thevacuum pump portion 16. At the same time, the rotation of theshaft 18 can drivingly rotate thepropeller 36 of thecoolant pump portion 14 to pump coolant through thecoolant flow path 26. - The
vacuum pump portion 16 and thecoolant pump portion 14 can be joined and integrated such that theassembly 10 is very compact. Also, theshaft 18 andpulley 20 can be common to both thevacuum pump portion 16 and thecoolant pump portion 14 for driving both. Thus, theassembly 10 can operate very efficiently.
Claims (20)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/553,123 US20140023477A1 (en) | 2012-07-19 | 2012-07-19 | Combination pump assembly and method of use |
PCT/US2013/048501 WO2014014637A1 (en) | 2012-07-19 | 2013-06-28 | A combination pump assembly and method of use |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/553,123 US20140023477A1 (en) | 2012-07-19 | 2012-07-19 | Combination pump assembly and method of use |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140023477A1 true US20140023477A1 (en) | 2014-01-23 |
Family
ID=48782658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/553,123 Abandoned US20140023477A1 (en) | 2012-07-19 | 2012-07-19 | Combination pump assembly and method of use |
Country Status (2)
Country | Link |
---|---|
US (1) | US20140023477A1 (en) |
WO (1) | WO2014014637A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0059086A1 (en) * | 1981-02-19 | 1982-09-01 | Wabco Automotive U.K. Limited | Ancillary rotary equipment for engines |
US4497618A (en) * | 1983-09-12 | 1985-02-05 | General Motors Corporation | Combined vacuum pump and power steering pump assembly |
US20100006044A1 (en) * | 2008-07-14 | 2010-01-14 | Honda Motor Co., Ltd. | Variable capacity water pump via electromagnetic control |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2205611B (en) * | 1987-06-09 | 1991-08-21 | Austin Rover Group | A pump assembly for a motor vehicle. |
-
2012
- 2012-07-19 US US13/553,123 patent/US20140023477A1/en not_active Abandoned
-
2013
- 2013-06-28 WO PCT/US2013/048501 patent/WO2014014637A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0059086A1 (en) * | 1981-02-19 | 1982-09-01 | Wabco Automotive U.K. Limited | Ancillary rotary equipment for engines |
US4497618A (en) * | 1983-09-12 | 1985-02-05 | General Motors Corporation | Combined vacuum pump and power steering pump assembly |
US20100006044A1 (en) * | 2008-07-14 | 2010-01-14 | Honda Motor Co., Ltd. | Variable capacity water pump via electromagnetic control |
Also Published As
Publication number | Publication date |
---|---|
WO2014014637A1 (en) | 2014-01-23 |
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