US20060024176A1 - Electric pump and modularized fuel supply system with such electric pump - Google Patents

Electric pump and modularized fuel supply system with such electric pump Download PDF

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Publication number
US20060024176A1
US20060024176A1 US11/188,774 US18877405A US2006024176A1 US 20060024176 A1 US20060024176 A1 US 20060024176A1 US 18877405 A US18877405 A US 18877405A US 2006024176 A1 US2006024176 A1 US 2006024176A1
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United States
Prior art keywords
pump
fuel
section
fluid
outlet port
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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US11/188,774
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English (en)
Inventor
Masaki Ikeya
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.)
Aisan Industry Co Ltd
Original Assignee
Aisan Industry Co Ltd
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Filing date
Publication date
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Assigned to AISAN KOGYO KABUSHIKI KAISHA reassignment AISAN KOGYO KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IKEYA, MASAKI
Publication of US20060024176A1 publication Critical patent/US20060024176A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/048—Arrangements for driving regenerative pumps, i.e. side-channel pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/001—Preventing vapour lock
    • F04D9/002—Preventing vapour lock by means in the very pump
    • F04D9/003—Preventing vapour lock by means in the very pump separating and removing the vapour

Definitions

  • the present invention relates to an electric pump used, for example, as an in-tank fuel pump for a pumping fuel stored in a automobile fuel tank, and a modularized fuel supply system with such an electric pump.
  • the fuel pump 201 integrally includes a motor section 202 and a pump section 203 provided at one end of the motor section (at the lower end in FIG. 30 ).
  • the outer shell of the fuel pump 201 is a pump casing 205 , which includes a generally tubular shell 206 , a motor cover 207 sealing one end of the tubular shell (the upper end in FIG. 30 ), a pump cover 208 sealing the other end of the tubular shell (the lower end in FIG. 30 ), and a pump housing 209 overlayingly provided on the pump cover 208 to partition the inside area of the tubular shell 206 into a motor compartment 210 and a pump compartment 211 .
  • the motor section 202 consists, for example, of a brush-type DC motor, including magnets 213 secured within the tubular shell 206 , and an armature 214 rotating within the tubular shell 206 .
  • the armature 214 includes an armature body 215 having an iron core, a coil, a commutator 216 and the like, and a shaft 218 provided through the axis of the armature body 215 .
  • One end (the upper end in FIG. 30 ) of the shaft 218 is rotatably supported within the motor cover 207 by a bearing 221 .
  • the other end (the lower end in FIG.
  • the shaft 218 passes through the pump housing 209 , rotatably supported therewithin by a bearing 222 .
  • the lower end of the shaft 218 which projects into the pump compartment 211 , is a connecting portion 219 having a certain modified cross section such as a D-shaped cross section.
  • the motor cover 207 incorporates a brush 224 slidingly contacting with the commutator 216 of the armature 214 , a spring 225 pushing the brush 224 onto the commutator 216 , and the like. Furthermore, the motor cover 207 includes a connector section 228 having a terminal 227 electrically connected with the brush 224 . Thus, the armature 214 is rotated by energizing the coil (not shown) of the armature 214 via the terminal 227 , the brush 224 and the commutator 216 . In addition, the motor cover 207 is provided with an outlet port 230 upwardly opening to the outside of the fuel pump 201 . The outlet port 230 also communicates with the motor compartment 210 .
  • the pump compartment 211 rotatably receives a generally disk-shaped impeller 234 .
  • the outer periphery of the impeller 234 is provided with a plurality of vane grooves 235 in a circumferential predetermined interval.
  • the vane grooves 235 on the top surface of the impeller 234 are in mirror symmetry with the vane grooves 235 of the bottom surface of the impeller 234 .
  • the vane grooves 235 on the both surfaces communicate with each other through communicating holes 236 .
  • the center of the impeller 234 is, on the other hand, provided with a shaft hole 238 .
  • the shaft hole 238 has a certain modified cross section such as a D-shaped cross section cooperating with the connecting portion 219 of the shaft 218 of the armature 214 .
  • the connecting portion 219 of the armature 214 is engagingly inserted into the shaft hole 238 so as to transmit the torque to the impeller 234 .
  • the wall surfaces of the pump housing 209 and the pump cover 208 which respectively face the top and the bottom surfaces of the impeller 234 , are provided with generally cylindrical recesses 239 corresponding respectively to the top and the bottom surfaces around the shaft hole 238 of the impeller 234 .
  • the recess 239 facing the top surface of the impeller 234 is substantially symmetrical to the recess 239 facing the bottom surface of the impeller 234 .
  • the recesses 239 of the pump cover 208 and the recess 239 of the pump housing 209 respectively define bearing compartments 263 .
  • the wall surfaces 209 a and 208 a of the pump housing 209 and the pump cover 208 are provided with generally arc-shaped flow channel 240 corresponding respectively to the vane grooves 235 on the top and the bottom surfaces of the impeller 234 .
  • the pump cover 208 is provided with an inlet port 242 downwardly opening to the outside of the fuel pump 201 .
  • the inlet port 242 also communicates with the starting end of the flow channel 240 .
  • the pump cover 208 is provided with a vapor vent 276 downwardly opening to the outside of the fuel pump 201 .
  • the vapor vent 276 also communicates with a predetermined point between the starting end and the terminating end of the flow channel 240 .
  • the pump housing 209 is provided with an outlet port 245 opening to the motor compartment 210 .
  • the outlet port 245 also communicates with the terminating end of the flow channel 240 .
  • the first outlet port 245 and the vapor vent 276 in FIG. 30 are in fact disposed apart at a predetermined angle along the circumferential direction of the impeller 234 .
  • the armature 214 is firstly rotated by energizing the coil (not shown) of the armature 214 . Then, cooperating with the shaft 218 of the armature 214 , the impeller 234 is rotated in a predetermined direction that creates a pumping action. This causes the flow channel 240 to draw a fluid or a fuel from the inlet port 242 of the pump cover 208 . The fuel is applied with kinetic energy from the vane grooves 235 both on the top and the bottom surfaces of the impeller 234 , which communicate with each other through the communicating holes 236 .
  • the fuel is transferred through the flow channels 240 in both the pump cover 208 and the pump housing 209 , directing from the starting ends to the terminating ends. In the course of the transfer, the fuel is gradually pressurized. The fuel transferred to the terminating ends of both the flow channels 240 is then discharged from the outlet port 245 of the pump housing 209 into the motor compartment 210 of the motor section 202 . Furthermore, after passing through the motor compartment 210 , the fuel is discharged from the outlet port 230 of the motor cover 207 . It is to be noted that the description “first outlet port” refers to the fuel outlet port 245 of the pump section 203 , while the description “second outlet port” refers to the fuel outlet port 230 of the motor section 202 . On the other hand, the vapors contained in the fuel transferred in the pumping cycle involving the rotation of the impeller 234 is vented from the vapor vent 276 of the pump cover 208 to the outside of the fuel pump 201 .
  • the prior art fuel supply system including the above-mentioned fuel pump (electric pump) 201 as an in-tank fuel pump, is described referring to FIG. 31 in which the flow path diagram of the fuel supply system is shown.
  • the fuel supply system 284 includes a high-pressure filter 330 , a pressure regulator 286 and low-pressure filter 332 in a modular configuration.
  • the modularized fuel pump 201 is disposed in a reservoir cup (or merely referred to as a cup) mounted within a fuel tank 292 .
  • the high-pressure filter 330 is referred to as a “fuel filter” or “back-end filter.”
  • the pressure regulator 286 is referred to as “regulator valve,” while the low-pressure filter 332 is referred to as a “suction filter” or “front-end filter.”
  • the fuel pump 201 draws and pressurizes the fuel within the reservoir cup 290 to discharge the fuel into the high-pressure filter 330 .
  • the high-pressure filter 330 removes foreign particles in the pressurized fuel discharged from the fuel pump 201 , and then discharges the pressurized fuel into the pressure regulator 286 .
  • the high-pressure filter 330 includes a fine filter element (not shown) for removing foreign particles in the fuel in order to avoid having the particles reach the pressure regulator 286 or an injector 312 .
  • the pressure regulator 286 controls the fuel pressure of the pressurized fuel discharged from the high-pressure filter 330 , draining the excess, pressurized fuel into the reservoir cup 290 .
  • the pressurized fuel controlled with regard to fuel pressure by the pressure regulator 286 is discharged into a fuel supply line 311 outside of the fuel tank 292 .
  • the fuel supply line 311 is connected with the injector 312 .
  • the low-pressure filter 332 removes foreign particles drawn from within the reservoir cup 290 into the fuel pump 201 .
  • the low-pressure filter 332 includes a coarse filter element (not shown) for removing foreign particles in order to avoid having the particles reach the fuel pump.
  • the fuel within the reservoir cup 290 is drawn via the low-pressure filter 332 , pressurized, and fed into the high-pressure filter 330 . Then, the fuel, having passed through the high-pressure filter 330 , passes through the pressure regulator 286 and flows into the fuel supply line 311 outside of the fuel tank 292 . The fuel flowing into the fuel supply line 311 is fed into the injector 312 .
  • the pressure regulator 286 controls the fuel pressure and drains any excessive highly pressurized fuel into the reservoir cup 290 .
  • relatively large particles referred to as ⁇ in FIG. 31
  • relatively small particles referred to as ⁇ in FIG. 31
  • brush-wear particles or motor-generated particles referred to as ⁇ in FIG. 31
  • the above-mentioned fuel supply system 284 (shown in FIG. 31 ) is disclosed, for example, in U.S. Pat. No. 6,739,354 by Oku et al. which is assigned to the same assignee as the present invention.
  • the disclosure of U.S. Pat. No. 6,739,354 is incorporated herein by reference in its entirety.
  • the above-mentioned fuel pump 201 (shown in FIG. 30 ) is disclosed, for example, in Japanese Laid-Open Publication No. 2002-303219.
  • the fuel pump including the first outlet port 245 from which the fuel within the pump section 203 is directly discharged to the outside of the pump, is disclosed, for example, in Netherlands Patent No. 6806734.
  • the above-mentioned fuel pump 201 (shown in FIG. 30 ) discharges the pressurized fuel from the second outlet port 230 after permitting the fuel into the motor compartment 210 from the first outlet port 245 .
  • the motor section 202 of the fuel pump 201 the commutator 216 of the armature 214 slidingly contacts with the brush 224 , which generates brush-wear particles or motor-generated particles (referred to as ⁇ in FIG. 31 ). Therefore, the fuel discharged from the second outlet port 230 of the fuel pump 201 contains motor-generated particles.
  • the high-pressure filter 330 to be provided at the back end of the fuel pump 201 so as to avoid the foreign particles generated in the motor section 202 (referred to as ⁇ in FIG. 31 ) and the relatively small particles having passed through the low-pressure filter 332 (referred to as ⁇ in FIG. 31 ) from reaching the pressure regulator 286 or the injector 312 to cause troubles to the above-mentioned fuel supply system 284 .
  • the low-pressure filter 332 needs to be provided at the front end of the fuel pump 201 so as to avoid the relatively large particles contained in the fuel within the reservoir cup 209 of the fuel tank 292 (referred to as ⁇ in FIG. 31 ) from traveling into the fuel pump 201 to cause troubles.
  • the prior art fuel supply system 284 needs both the low-pressure filter 332 and the high-pressure filter 330 .
  • the low-pressure filter 332 is disposed at the lower end of the fuel pump as disclosed in U.S. Pat. No. 6,739,354
  • Another problem is the increased cost of the fuel supply system 284 because both the low-pressure filter 332 and the high-pressure filter 330 are required. This problem is also applicable to the fuel supply system of Japanese Laid-Open Publication No. 2002-303219.
  • the pump of Netherlands Patent No. 6806734 solves such problems as having the motor-generated particles contained in the fluid discharged from the outlet port, because the fluid within the pump section can be discharged from the outlet port directly to the outside of the pump, without passing through the inside of the motor section.
  • the fact that the fluid does not pass through the motor compartment results in another problem.
  • the problem is that such a pump does not allow the fluid to cool the motor section, nor allow the fluid to lubricate the sliding portions, for example, between the armature shaft and the bearing, and between the armature commutator and the brush.
  • Such a pump is undesirable for an in-tank fuel pump disposed, for example, in a fuel tank.
  • an electric pump may include an outlet port (referred to as a “first outlet port” for the convenience of explanation) allowing a fluid drawn into the pump section and pressurized to be discharged directly to the outside of the pump.
  • first outlet port a fluid drawn into the pump section and pressurized to be discharged directly to the outside of the pump.
  • the fluid discharged from the pump compartment is discharged directly from the first outlet port, not through the motor compartment.
  • This allows a fluid without motor-generated particles to be discharged from the pump section directly to the outside of the pump.
  • the description “to be discharged directly to the outside of the pump” refers to the fluid in the pump compartment being discharged from the pump compartment to the outside of the pump, not passing through the motor compartment or other flow paths.
  • the electric pump may further include a communicating opening allowing a portion of the fluid to flow from the pump section into the motor compartment. This enables the portion of the fluid to be guided from the pump section into the motor compartment through the communicating openings so as to cool the motor section and lubricate the sliding portions.
  • sliding portions refers to portions sliding between the stator elements (i.e. bearings, brush, and the like) and the rotor elements (i.e. a shaft and a commutator of the armature).
  • the above-mentioned electric pump allows, on one hand, for discharging a fluid without motor-generated particles from the pump section directly to the outside of the pump, and on the other hand, for cooling the motor section and lubricating the sliding portions with the fluid.
  • the armature body is engaged with the impeller to transmit the torque thereto by an engagement means. This allows the axial length of the electric pump to be reduced, and therefore the electric pump to be miniaturized.
  • the communicating opening is provided at a point located after a quarter of the pumping cycle from the starting end to the terminating end in a single rotation of the impeller. This allows vapor or vapor bubbles generated in the fluid, for example, by elevated temperatures during the pumping cycle, to be effectively vented into the motor compartment via the communicating openings. It is to be noted that the vapor cannot be effectively vented at a point located before the quarter of the pumping cycle from the starting end in a single rotation of the impeller because the fluid has not built up enough pressure.
  • a vapor vent is provided to exit to the outside of the pump the vapor generated in the fluid during the pumping cycle in a single rotation of the impeller. This allows the vapor generated in the fluid, for example, by elevated temperatures during the pumping cycle, to be vented from the vapor vent to the outside of the pump. It is to be noted that the vapors can be effectively vented by providing the vapor vent at a point located after the quarter of the pumping cycle from the starting end in a single rotation of the impeller.
  • a second outlet port is provided in the pump to discharge to the outside of the pump the fluid discharged from the pump section into the motor compartment via the communicating opening. This allows the fluid discharged from the pump section into the motor compartment via the communicating opening to be discharged from the second outlet port to the outside of the pump. Therefore, the fluid passes within the motor compartment so that the cooling of the motor section and the lubricity of the sliding portions therewithin are increased.
  • the end cap member of the motor section is provided with the second outlet port. This allows the fluid discharged from the pump section into the motor compartment via the communicating openings to be discharged to the outside of the pump via the second outlet port, after passing from the pump side to the distal side of the motor compartment. Therefore, the fluid passes through substantially the overall length of the motor compartment so that the cooling of the motor section and the lubricity of the sliding portions within the motor section are further increased.
  • the second outlet port is provided with a check valve. This enables the check valve to prevent the fluid from flowing back from the outside of the pump into the motor compartment via the second outlet port.
  • the electric pump is provided with a jet pump driven by the fluid flow discharged from the second outlet port. This allows the fluid outside of the pump to be drawn and transferred to a predetermined position by using the fluid flow discharged from the second outlet port as a driving source. Therefore, it is possible to effectively use the pressure energy of the fluid flow discharged from the second outlet port.
  • the end cap member of the pump is provided with an outlet port (a first outlet port) discharging the fluid drawn into the pump section and then pressurized, directly to the outside of the pump.
  • a first outlet port discharging the fluid drawn into the pump section and then pressurized, directly to the outside of the pump.
  • the inlet port of the pump section opens through the outer side surface. This allows the fluid to be drawn into the pump section from the inlet port opening through the outer side surface.
  • a modularized fuel supply system may include an in-tank fuel pump drawing, pressurizing and discharging the fuel within the fuel tank, and a front-end filter removing foreign particles in the fuel drawn into the fuel pump.
  • any one of the electric pumps of the above-mentioned embodiments is used as a fuel pump. Therefore, it is possible to provide a fuel supply system with an electric pump as a fuel pump that can discharge a fluid without motor-generated particles from the pump section directly to the outside of the pump, and can also cool the motor section and lubricate the sliding portions with the fluid.
  • the front-end filter removes foreign particles, especially small particles, in a fuel drawn into the electric pump. Such small particles adversely affect the sliding portions of the electric pump. Therefore, it is possible to reduce or prevent troubles associated with the sliding portions so as to increase the electric motor life.
  • the modularized fuel supply system includes an in-tank fuel pump drawing, pressurizing and discharging the fuel within the fuel tank, a front-end filter removing foreign particles in the fuel drawn into the fuel pump, and a reservoir cup disposed within the fuel tank to reserve a fuel drawn into the tank through the front-end filter by the fuel pump.
  • any one of the electric pumps of the above-mentioned embodiments having a second outlet port is used as a fuel pump. Therefore, it is possible to provide a fuel supply system with an electric pump as a fuel pump that can discharge a fluid without motor-generated particles from the pump section directly to the outside of the pump, and can also cool the motor section and lubricate the sliding portions with the fluid.
  • the fuel supply system is provided with a jet pump driven by the fluid flow discharged from the second outlet port of the electric pump in order to transfer a fuel outside the reservoir cup but within the fuel tank into the reservoir cup.
  • the modularized fuel supply system includes an in-tank fuel pump drawing, pressurizing and discharging the fuel within the fuel tank, a front-end filter removing foreign particles in the fuel drawn into the fuel pump, and a reservoir cup disposed within the fuel tank to reserve a fuel drawn into the cup through the front-end filter by the fuel pump.
  • the electric pumps of the above-mentioned embodiments having a jet pump driven by a fluid flow discharged from the second outlet port, is used as a fuel pump.
  • a fuel supply system with an electric pump as a fuel pump that can discharge a fluid without motor-generated particles from the pump section directly to the outside of the pump, and can also cool the motor section and lubricate the sliding portions with the fluid.
  • a high-pressure filter which is required to be disposed at the back-end of the prior art fuel pump, because the fuel discharged from the outlet port (first outlet port) of the electric pump does not contain motor-generated particles.
  • the front-end filter removes foreign particles in a fuel drawn into the electric pump, especially small particles adversely affecting sliding portions of the electric pump.
  • the fuel supply system is arranged and constructed to transfer a fuel from outside of the reservoir cup but within the fuel tank into the reservoir cup by the jet pump driven by the fluid flow discharged from the second outlet port of the electric pump.
  • This enables the fuel outside of the reservoir cup but within the fuel tank to be drawn and then transferred into the reservoir cup by using the fluid flow (fuel flow) discharged from the second outlet port of the electric pump as a driving source to drive the jet pump. Therefore, it is possible to effectively use the pressure energy of the fuel flow discharged from the second outlet port of the electric pump.
  • the front-end filter includes a filter element with a multilayer structure in which the outer layer is coarse while the inner layer is fine. This allows the front-end filter element to effectively remove foreign particles in a fuel drawn into the fuel pump.
  • the front-end filter is provided with a filter element formed substantially cylindrical to surround the fuel pump.
  • This wide area filtering allows the front-end filter element to effectively remove foreign particles in a fuel drawn into the fuel pump.
  • This also allows the filtering area of the filter element to be increased so that the suction resistance is reduced. Therefore, it is possible to reduce the electric current consumption of the fuel pump.
  • the modularized fuel supply system is provided with a pressure regulator. This allows the pressure regulator to control the fuel pressure of the pressurized fuel discharged from the fuel pump.
  • the pressure regulator may be disposed overlapping radially with respect to the fuel pump and the front-end filter. Therefore, it is possible to provide the fuel supply system compactly with the pressure regulator.
  • the filter case is integrally formed with at least a portion of the regulator housing of the pressure regulator. Due to this, at least a portion of the regulator housing of the pressure regulator does not need to be provided separately. Therefore, it is possible to make the pressure regulator simplified and lightweight.
  • the pressure regulator is fitted into the filter case with the mounting recesses provided on the filter case. This allows the pressure regulator, which is made as a discrete component, to be mounted easily to the mounting recesses provided on the filter case.
  • the front-end filter is provided with an outlet path.
  • the outlet path is connected with the outlet port (first outlet port) discharging the fuel, which is drawn into the pump section of the fuel pump, directly to the outside of the pump.
  • the fuel discharged from the outlet port flows into a predetermined part through the outlet path.
  • a dedicated component forming the outlet path is not required. This makes it possible to make the fuel supply system compact and lightweight, and reduce the manufacturing cost.
  • the inlet port of the fuel pump is connected with the inlet path exit of the front-end filter in a fitting structure with a male port and a corresponding female port. This allows the connecting operation between the inlet port of the fuel pump and the inlet path exit of the front-end filter to be easily performed.
  • a sealing member is interposed between the inlet port of the fuel pump and the inlet path exit of the front-end filter. This reduces or prevents fuel leakages from a connecting portion between the inlet port of the fuel pump and the inlet path exit of the front-end filter.
  • the outlet path entrance of the front-end filter is connected with the outlet port of the fuel pump, which is connected with the outlet path entrance, in a fitting structure with a male port and a corresponding female port. This allows the connecting operation between the outlet path entrance of the front-end filter and the outlet port (first outlet port) of the fuel pump to be easily performed.
  • a sealing member is interposed between the outlet path entrance of the front-end filter and the outlet port of the fuel pump. This reduces or prevents fuel leakages from a connecting portion between the outlet path entrance of the front-end filter and the outlet port (first outlet port) of the fuel pump.
  • the communicating opening is provided with a check valve. This enables the check valve to prevent the fluid, when the pump stops, from flowing back into the pump section through the communicating opening from the motor compartment. Therefore, it is possible to reduce or prevent a fluid containing motor-generated particles flowing from the first outlet port to the outside of the pump when the pump is operated again after the stop.
  • FIG. 1 is a side elevational view, partly in cross section for clarity, of a fuel pump according to a first representative embodiment of the present invention
  • FIG. 2 is a top view of the fuel pump according to the first representative embodiment
  • FIG. 3 is a bottom view of the fuel pump according to the first representative embodiment
  • FIG. 4 is a perspective view, showing the relationship between an inlet port and an outlet port of the fuel pump according to the first representative embodiment
  • FIG. 5 is a cross sectional view of the pump section of the fuel pump according to the first representative embodiment
  • FIG. 6 is a bottom view of the pump housing, showing a relationship between a flow channel and a communicating opening within the pump housing according to the first representative embodiment
  • FIG. 7 is a flow path diagram of the fuel pump according to the first representative embodiment
  • FIG. 8 is a cross sectional view of the pump section of a fuel pump according to a second representative embodiment of the present invention.
  • FIG. 9 is a view similar to FIG. 1 , showing a fuel pump according to a third representative embodiment of the present invention.
  • FIG. 10 is a perspective view, showing the relationship between an inlet port and an outlet port of the fuel pump of FIG. 9 ;
  • FIG. 11 is a perspective view, showing a relationship between an inlet port and an outlet port of an alternative fuel pump according to the third representative embodiment
  • FIG. 12 is a view similar to FIG. 5 , showing a pump section of a fuel pump according to a fourth representative embodiment of the present invention.
  • FIG. 13 is a view similar to FIG. 1 , showing a fuel pump according to a fifth representative embodiment of the present invention
  • FIG. 14 is a view similar to FIG. 1 , showing a fuel pump according to a sixth representative embodiment of the present invention.
  • FIG. 15 is a side elevational view, partly in cross section for clarity, of a modularized fuel supply system according to a seventh representative embodiment of the present invention.
  • FIG. 16 is a top view, partly in horizontal cross section for clarity, of the fuel supply system of FIG. 15 ;
  • FIG. 17 is an enlarged cross sectional view of the fuel supply system of FIG. 15 , showing connecting portions between the front-end filter case and the fuel pump;
  • FIG. 18 is a flow path diagram of the fuel supply system of FIG. 15 ;
  • FIG. 19 is a view similar to FIG. 17 , showing another fitting structure between the front-end filter case and the fuel pump;
  • FIG. 20 is a view similar to FIG. 17 , showing yet another fitting structure between the front-end filter case and the fuel pump;
  • FIG. 21 is a view similar to FIG. 15 , showing a modularized fuel supply system according to a seventh embodiment of the present invention.
  • FIG. 22 is a flow path diagram of the fuel supply system of FIG. 21 ;
  • FIG. 23 is a view similar to FIG. 15 , showing a modularized fuel supply system according to a eighth representative embodiment of the present invention.
  • FIG. 24 is a perspective view showing the mounting recess of the filter case of FIG. 23 .
  • FIG. 25 is a view similar to FIG. 15 , showing a modularized fuel supply system according to a ninth representative embodiment of the present invention.
  • FIG. 26 is a view similar to FIG. 16 , showing a modularized fuel supply system according to a tenth representative embodiment of the present invention.
  • FIG. 27 is a view similar to FIG. 17 , showing a pump section of a fuel pump according to an eleventh representative embodiment of the present invention.
  • FIG. 28 is a view similar to FIG. 27 , showing a pump section of a fuel pump according to a twelfth representative embodiment of the present invention.
  • FIG. 29 is a view similar to FIG. 21 , showing a modularized fuel supply system according to a thirteenth representative embodiment of the present invention.
  • FIG. 30 is a side elevational view, partly in cross section for clarity, of the prior art fuel pump.
  • FIG. 31 is a flow path diagram of the prior art fuel supply system of FIG. 30 .
  • FIGS. 1 to 7 a fuel pump according to a first representative embodiment (hereinafter referred to as a “first representative fuel pump”) is shown in FIGS. 1 to 7 .
  • a fuel pump 1 is integrally provided with a motor section 2 and a pump section 3 .
  • the pump section 3 is disposed at one end of the motor section 2 (the lower end in FIG. 1 ).
  • the outer shell of the fuel pump 1 is a pump casing 5 , which includes a generally tubular shell 6 , a motor cover 7 sealing one end of the tubular shell (the upper end in FIG. 1 ), a pump cover 8 sealing the other end of the tubular shell (the lower end in FIG. 1 ), and a pump housing 9 overlayingly provided on the pump cover 8 to partition the inside area of the pump casing 5 into a motor compartment 10 and a pump compartment 11 .
  • the motor cover 7 is also referred to herein as an “end cap member of the motor section.”
  • the pump cover 8 is also referred to herein as an “end cap member of the pump section.”
  • a pump compartment 11 is defined by the pump cover 8 and the pump housing 9 .
  • the pump housing 9 is overlayingly provided on the pump cover 8 .
  • the upper surface of the pump cover 8 and the lower surface of the pump housing 9 define a cylindrical recess.
  • the motor section 2 consists, for example, of a brush-type DC motor, including magnets 13 secured within the tubular shell 6 , and an armature 14 rotating within the tubular shell 6 .
  • the armature 14 includes an armature body 15 having an iron core, a coil, a commutator 16 and the like, and a shaft 18 provided through the axis of the armature body 15 in an up and down direction.
  • One end (the upper end in FIG. 1 ) of the shaft 18 is rotatably supported within the motor cover 7 by a bearing 21 .
  • the other end (the lower end in FIG. 1 ) of the shaft 18 passes through the pump housing 9 , rotatably supported within the pump housing 9 by a bearing 22 .
  • the lower end of the shaft 18 which projects into the pump compartment 11 , is a connecting portion 19 having a certain modified cross section such as a D-shaped cross section.
  • the motor cover 7 incorporates a brush 24 slidingly contacting with the commutator 16 of the armature 14 , a spring 25 pushing the brush 24 onto the commutator 16 , and the like. Furthermore, the motor cover 7 includes a connector section 28 having a terminal 27 electrically connected with the brush 24 . Thus, the armature 14 is rotated by energizing the coil (not shown) of the armature 14 via the terminal 27 , the brush 24 , and the commutator 16 .
  • the motor cover 7 is provided with an outlet port (referred to as a “second outlet port” for the convenience of explanation) 30 upwardly opening to the outside of the fuel pump 1 .
  • the second outlet port also communicates with the motor compartment 10 .
  • the motor cover 7 is also provided with a second outlet tube 31 , which projects axially above the motor cover 7 and forms an outlet portion of the second outlet port 30 .
  • the pump compartment 11 is rotatably provided with a generally disk-shaped impeller 34 .
  • the outer periphery of the impeller 34 is provided with a plurality of vane grooves 35 at a circumferential predetermined interval.
  • the vane grooves 35 on the top surface of the impeller 34 are in mirror symmetry with the vane grooves 35 of the bottom surface of the impeller 34 .
  • the vane grooves 35 on both surfaces communicates with each other through communicating holes 36 .
  • the center of the impeller 34 is provided with a shaft hole 38 .
  • the shaft hole 38 has a certain modified cross section such as a D-shaped cross section corresponding to the connecting portion 19 of the shaft 18 of the armature 14 .
  • the connecting portion 19 of the armature 14 is engagingly inserted into the shaft hole 38 so as to transmit the torque to the impeller 34 .
  • the wall surfaces of the pump housing 9 and the pump cover 8 which respectively face the top and the bottom surfaces of the impeller 34 , are provided with generally cylindrical recesses 39 corresponding respectively to the top and the bottom surfaces around the shaft hole 38 of the impeller 34 .
  • the recess 39 facing the top surface of the impeller 34 is substantially symmetrical to the recess 39 facing the bottom surface of the impeller 34 .
  • the recesses 39 of the pump cover 8 and the recess 39 of the pump housing 9 respectively define bearing compartments 63 .
  • the wall surfaces 9 a and 8 a of the pump housing 9 and the pump cover 8 are provided with generally arc-shaped (such as C-shaped) flow channels 40 corresponding respectively to the vane grooves 35 on the top and the bottom surfaces of the impeller 34 (see FIG. 6 ).
  • the pump cover 8 is provided with an inlet port 42 downwardly opening to the outside of the fuel pump 1 .
  • the inlet port 42 communicates with the starting end of the flow channel 40 .
  • the bottom surface of the pump cover 8 is provided with an inlet tube 43 , which forms the entrance portion of the inlet port 42 .
  • the pump cover 8 is provided with an outlet port (referred to as a “first outlet port” for the convenience of explanation) 45 downwardly opening to the outside of the fuel pump 1 .
  • the first outlet port 45 also communicates with the terminating end of the flow channel 40 .
  • the bottom surface of the pump cover 8 is provided with a first outlet tube 45 , which forms an exit portion of the first outlet port 45 .
  • the pump housing 9 is provided with a communicating opening 48 , opening to the motor compartment 10 .
  • the communicating opening 48 also communicates with a predetermined point between the starting end and the terminating end of the flow channel 40 .
  • the first outlet port 45 and the communicating opening 48 in FIGS. 1 and 5 are in fact disposed apart at a predetermined angle along the circumferential direction of the impeller 34 (see FIG. 6 ).
  • the communicating opening 48 is provided at a point located after a quarter of the pumping cycle as defined from the starting end to the terminating end, in a single rotation of the impeller 34 .
  • the quarter of the pumping cycle (the entire cycle is shown as an angular part A) is shown as an angular part B.
  • the communicating opening 48 is located within an angular part C. Providing the communicating opening 48 at a point located after the quarter of the pumping cycle allows vapor or vapor bubbles generated in the fluid or fuel, for example, by elevated temperatures during the pumping cycle, to be effectively vented into the motor compartment 10 through the communicating opening 48 . It is to be noted that the vapor cannot be effectively vented if the communicating opening 48 is provided at a point located before a quarter of the pumping cycle (within angular part B in FIG. 6 ) because the fluid has not reached a sufficient pressure.
  • the armature 14 is initially rotated by energizing the coil (not shown) of the armature 14 . Then, cooperating with the shaft 18 of the armature 14 , the impeller 34 is rotated in a predetermined direction that creates a pumping action. This causes the flow channel 40 to draw a fluid or a fuel from the inlet port 42 of the pump cover 8 (see FIG. 5 ) through the starting end of the flow channel 40 . Kinetic energy is applied to the fuel from the vane grooves 35 on the top and the bottom surfaces of the impeller 34 , which communicate with each other through the communicating holes 36 .
  • the fuel is transferred through the flow channels 40 on both of the pump cover 8 and the pump housing 9 , traveling from the starting end to the terminating end. In the course of the transfer, the fuel is gradually pressurized. Then, the fuel transferred to the terminating end of both flow channels 40 is discharged from the first outlet port 45 to the outside of the fuel pump 1 . At the same time, the vapor contained in the fuel transferred in the pumping cycle through the rotation of the impeller 34 is vented into the motor compartment 10 of the motor section 2 via the communicating opening 48 of the pump housing 9 . The vapor is then vented from the second outlet port 30 of the motor cover 7 (see FIG. 1 ).
  • the above-mentioned fuel pump 1 is provided with a first outlet port 45 , which allows a fluid, drawn into the pump section and pressurized, to be discharged directly to the outside of the pump 1 .
  • the fluid is discharged directly from the pump section 3 via the first outlet port 45 of the pump section 3 , not via the motor section 2 (see FIG. 7 ).
  • the fuel pump 1 further includes a communicating opening 48 allowing a portion of the fluid to flow from the pump section 3 into the motor compartment 10 (see FIG. 5 ).
  • the fuel pump 1 allows, on one hand, for discharging a fluid without motor-generated particles from the pump section 3 directly to the outside of the pump 1 , and on the other hand, for cooling the motor section 2 and lubricating the sliding portions with the fluid.
  • the communicating opening 48 of the pump housing 9 is provided at a point located after a quarter of the pumping cycle as defined from the starting end to the terminating end in a single rotation of the impeller 34 . This allows vapor generated in the fluid, for example, by elevated temperatures during the pumping cycle, to be effectively vented into the motor compartment 10 through the communicating opening 48 .
  • the fuel pump 1 is provided with a second outlet port 30 , which allows a fuel discharged from the pump section 3 into the motor compartment 10 via the communicating opening 48 to be discharged to the outside of the fuel pump 1 .
  • This allows the fuel discharged from the pump section 3 into the motor compartment 10 via the communicating opening 48 to be discharged to the outside of the pump via the second outlet port 30 . Therefore, the fuel passes through the motor compartment 10 so that the cooling of the motor section 2 and the lubricity of the sliding portions therewithin are increased.
  • the second outlet port 30 is provided in the motor cover 7 , which is an end cap member of the motor section 2 .
  • This allows the fluid discharged from the pump section 3 into the motor compartment 10 via the communicating opening 48 to be discharged to the outside of the fuel pump 1 via the second outlet port 30 , after passing from the pump side to the distal side of the motor compartment 10 . Therefore, the fuel passes through substantially the overall length of the motor compartment 10 so that the cooling of the motor section 2 and the lubricity of the sliding portions within the motor section 2 are further increased.
  • the fuel pump 1 is provided with the second outlet port 30 , which allows a fuel discharged from the pump section 3 into the motor compartment 10 via the communicating opening 48 to be discharged to the outside of the fuel pump 1 .
  • This increases the fuel pump performance at elevated temperatures because vapor from the pump section 3 is easily vented upwardly to the communicating opening 48 , the motor compartment 10 , or the second outlet port 30 .
  • the pump cover 8 which is an end cap member of the pump section 3 , is provided with the first outlet port 45 .
  • the first outlet port 45 allows a fluid drawn into the pump section 3 and pressurized to be discharged directly to the outside of the pump 1 .
  • the second representative fuel pump 1 is modified in the shaft structure of the pump side of the armature 14 and the connection structure between the armature 14 and the impeller 34 .
  • the pump side or the lower end of the shaft 18 has a generally round-bar-shaped shaft portion 18 a , without a connecting portion 19 (see FIG. 5 ).
  • the lower shaft portion 18 a of the shaft 18 is rotatably supported by a bearing 50 , which is mounted in the supporting hole 49 formed on the bottom surface of the pump cover recess 39 .
  • the lower surface of the armature body 15 is axially provided with a generally cylindrical protrusion portion 52 .
  • the outer periphery of the lower surface of the protrusion portion 52 is provided with a predetermined number of engaging raised portions 53 , the number of which is two in FIG. 8 .
  • the protrusion portion 52 having the engaging raised portions 53 is loosely inserted into a through hole 55 , which is formed in the pump housing 9 .
  • the through hole 55 penetrates through the pump housing 9 , the structure of which is different from the pump housing 9 of the first representative fuel pump 1 shown in FIG. 5 .
  • the recess 39 of the pump housing 9 shown in FIG. 5 is penetrated by a through hole 55 in the second representative fuel pump 1 shown in FIG. 8 .
  • the impeller 34 is provided with another through hole 57 , which has a larger diameter than the outer diameter of the bearing 50 .
  • the impeller 34 of the first representative fuel pump 1 shown in FIG. 5 is provided with the shaft hole 38 rather than the through hole 57 of the second representative fuel pump 1 shown in FIG. 8 .
  • the through hole 57 loosely receives the upper portion of the bearing 50 .
  • the periphery of the top surface of the through hole 57 is provided with two engaging recessed portions 58 , which respectively engage with the two raised engaging portions 53 of the armature 14 .
  • the engagement between the raised portions 53 and the recessed portions 58 allows the armature body 15 to transmit the torque to the impeller 34 at radially outer positions with respect to the shaft 18 (more specifically the lower shaft portion 18 a ) of the armature 14 .
  • the engaging raised portions 53 and the engaging recessed portions 58 are also referred to herein as “engagement means.”
  • the communicating opening 48 of the pump housing 9 of the first representative fuel pump 1 shown in FIG. 5 does not exist in the second representative fuel pump 1 shown in FIG. 8 .
  • the pump housing wall surface 9 a facing the impeller 34 is provided with communicating groove 60 , which extends radially and allows the flow channel 40 to communicate with the through hole 55 .
  • the communicating groove 60 communicates with the motor compartment 10 via the through hole 55 .
  • the pump cover wall surface 8 a facing the impeller 34 is also provided with a communicating groove 61 , which extends radially and allows the flow channel 40 to communicate with the recess 39 .
  • the communicating groove 61 communicates with the motor compartment 10 via the recess 39 , the through hole 57 of the impeller 34 , and the through hole 55 of the pump housing 9 . It is to be noted that the communicating groove 60 of the pump housing 9 and the communicating groove 61 of the pump cover 8 are provided at a point located after a quarter of the pumping cycle as defined from the starting end to the terminating end in a single rotation of the impeller 34 , similar to the communicating opening 48 of the first representative fuel pump 1 .
  • the armature body 15 transmits the torque to the impeller 34 through engagement means performed by the engagement raised portions 53 and the engagement recessed portions 58 .
  • This allows the axial (up and down direction in FIG. 8 ) length of the fuel pump 1 to be reduced. Therefore, the fuel pump 1 can be miniaturized.
  • the geometry of the engaging raised portions and the engaging recessed portions may be modified as long as the engagement between the raised portions 53 and the recessed portions 58 is ensured. It may also be possible to invert the positional relationship between the raised portions 53 and the recessed portions 58 .
  • the engaging recessed portions 58 may be provided on the armature body 15
  • the engaging raised portion 53 may be provided on the impeller 34 .
  • the vapor contained in the fuel transferred in the pumping cycle through the rotation of the impeller 34 are vented from the communicating groove 60 via the through hole 55 into the motor compartment 10 of the motor section 2 .
  • the pump cover 8 the vapor is vented from the communicating groove 61 via the recess 39 , the through hole 57 of the impeller 34 , and the through hole 55 of the pump housing 9 into the motor compartment 10 of the motor section 2 .
  • the vapor is finally vented from the second outlet port 30 of the motor cover 7 , after passing through the motor compartment 10 , similar to the first representative fuel pump 1 shown in FIG. 1 .
  • the “communicating opening” herein is defined by the through hole 55 and the communicating groove 60 in the pump housing 9 , the recess 39 and the communicating groove 61 in the pump cover 8 , and the through hole 57 of the impeller 34 .
  • the “bearing compartment” herein is defined by the through hole 55 of the pump housing 9 and the recess of the pump housing 9 .
  • the fuel pressure within the motor compartment 10 is substantially equal to the fuel pressure within the bearing compartment (designated as reference numeral 64 ) defined by the through hole 55 of the pump housing 9 and the recess 39 of the pump housing 9 .
  • the fuel pressure within the bearing compartment 263 of the pump housing 209 is generally equal to the fuel pressure within the bearing compartment 263 of the pump cover 208 .
  • This also requires the wall thickness of the pump cover 208 to be increased. In this manner, the increased wall thickness of both the pump cover 208 and the pump housing 209 results in the increased weight and also in the increased axial length of the fuel pump 201 .
  • the second representative fuel pump 1 allows the fuel pressure within the motor compartment 10 to be equal to the fuel pressure within the bearing compartment 63 of the pump section 3 .
  • the pump cover 8 and the pump housing 9 resist the differential fuel pressure between the motor compartment 10 and the bearing compartment 63 .
  • the wall thickness of the pump cover 8 and the pump housing 9 allows the fuel pump 1 can be made compact and lightweight. Accordingly, the manufacturing cost can be reduced.
  • the manufacturing cost can be reduced. Furthermore, it is not necessary to cut the shaft 18 into a certain modified cross section such as a D-shaped cross section for connecting the shaft 18 of the armature 14 to the impeller 34 . Accordingly, the manufacturing cost can be reduced.
  • the third representative fuel pump is a modification of the first representative fuel pump.
  • the third representative fuel pump 1 is modified in that the second outlet port 30 , defined by the second outlet tube 31 of the motor cover 7 of the first representative fuel pump 1 , is provided with a check valve or a ball member 67 .
  • the lower portion of the second outlet port 30 within the second outlet tube 31 is provided with a valve seat 68 , which is closed or opened by the ball member 67 .
  • the upper portion of the second outlet port 30 within the second outlet tube 31 is provided with a ball stopper 69 , for example, formed in a C-shaped ring.
  • the ball stopper 69 prevents the ball member 67 from ejecting out of the second outlet tube 31 .
  • the check valve 67 is opened at the valve seat 68 and permits the fuel to be discharged to the outside of the pump.
  • the check valve 67 is closed at the valve seat 68 and prevents the backflow of the fuel.
  • the outer side surface of the fuel pump 1 is provided with a pair of inlet ports (designated as reference numeral 65 ) vertically aligned. This eliminates the inlet port 42 and the inlet tube 43 of the first representative fuel pump 1 shown in FIG. 1 .
  • both of the inlet ports 65 penetrate radially through the tubular shell 6 of the pump casing 5 , the pump cover 8 , and the pump housing 9 .
  • the inlet ports 65 each of which has an opening on the tubular shell 6 , respectively communicate with the starting ends of the flow channels 40 of the pump cover 8 and the flow channel 40 of the pump housing 9 .
  • the third representative fuel pump 1 is provided with a check valve 67 on the second outlet port 30 of the motor cover 7 . This allows the check valve 67 to prevent the backflow of the fuel into the motor compartment 10 through the second outlet port from the outside of the pump.
  • the fuel can be drawn into the pump section 3 from the inlet ports 65 of the outer side surface of the third representative fuel pump 1 .
  • the arrangement of the inlet port 42 and the first outlet port 45 may be modified as follows.
  • the inlet port (indicated as reference numeral 70 ) and the first outlet port (indicated as reference numeral 73 ) may be provided on the outer side surface of the fuel pump 1 .
  • an inlet tube 71 forming the entrance portion of the inlet port 70 and an outlet tube 74 forming the exit portion of the first outlet port 73 are projected from the outer side surface of the tubular shell 6 .
  • the fourth representative fuel pump is a modification of the first representative fuel pump.
  • the fourth representative fuel pump 1 is provided with another vapor vent 76 , which opens downwardly to the outside of the pump 1 and communicates with a predetermined point between the starting end and the terminating end of the flow channel 40 .
  • the vapor vent 76 is provided to exit vapor generated in the fluid during the pumping cycle in a single rotation of the impeller 34 to the outside of the pump 1 .
  • the vapor vent 76 is provided at a point located after a quarter of the pumping cycle starting from the starting end 42 (see FIG. 6 ).
  • the vapor vent 76 allows vapor generated in a fuel, for example, by elevated temperatures during the pumping cycle to be effectively vented from the pump compartment 11 to the outside of the pump 1 . It is to be noted that the vapor can be effectively vented by providing the vapor vent 76 at a point located after a quarter of the pumping cycle from the starting end in a single rotation of the impeller 34 .
  • the fifth representative fuel pump is a modification of the first representative fuel pump.
  • the fifth representative fuel pump 1 is modified in that the second outlet port 30 of the motor cover 7 is closed. Instead, there are a predetermined number of second outlet ports 78 , the number of which is two shown in FIG. 13 , formed in the tubular shell 6 .
  • the second outlet ports 78 penetrate at the upper end of the motor compartment 10 , opening radially outward with respect to the tubular shell 6 .
  • the sixth representative fuel pump is a modification of the first representative fuel pump.
  • the sixth representative fuel pump 1 is a modification of the first representative fuel pump 1 shown in FIG. 1 .
  • the motor cover 7 of the sixth representative fuel pump 1 is provided with a jet pump 80 driven by the fluid flow discharged from the second outlet port. It is to be noted that the terminal 27 and the connector section 28 of the first representative fuel pump 1 (see FIG. 1 ) are not shown in FIG. 14 for the convenience of explanation.
  • the jet pump 80 is provided with an exhaust port 81 opening upwardly and a suction port 82 opening laterally.
  • a negative pressure is generated in the jet pump 80 .
  • the negative pressure draws a fuel from the suction port 82 , and then both of the fuels from the second outlet port 30 and the suction port 82 are mixed in the jet pump 80 .
  • the mixed fuels are discharged from the exhaust port 81 .
  • the jet pump 80 creates a pumping action to transfer a fuel to a predetermined part by using a fuel flow discharged from the second outlet port 30 as a driving source. Therefore, it is possible to effectively use the pressure energy of the fuel flow discharged from the second outlet port 30 .
  • the basic configuration of a jet pump 80 is well known, the details thereof will not be described herein.
  • a fuel supply system according to a seventh representative embodiment (hereinafter referred to as a “seventh representative fuel supply system”) will be described.
  • This embodiment is a returnless fuel supply system, in which the first representative fuel pump (electric pump) 1 is provided as an in-tank fuel pump and no excess fuel from the engine is returned to the fuel tank.
  • the seventh representative fuel supply system 84 includes the first representative fuel pump 1 , a front-end filter 85 , a pressure regulator (regulator valve) 86 , a jet pump 87 , and a set plate 88 .
  • the seventh representative fuel supply system 84 is modularized and disposed in a reservoir cup (or merely referred to as a cup) 90 mounted within a fuel tank 92 .
  • the top of the fuel tank 92 is provided with an opening 93 for inserting the fuel supply system 84 into the fuel tank 92 .
  • the fuel tank 92 substantially sealingly defines a fuel receiving space when the opening 93 has been closed by the set plate 88 .
  • the reservoir cup 90 which is referred to as a “subtank” or “reserve cup,” is disposed in proximity of the bottom plate 92 a within the fuel tank 92 .
  • the reservoir cup 90 reserves a fuel, which flows into the cup 90 from within the fuel tank 92 and is drawn into the fuel pump 1 .
  • the front-end filter 85 is an “integrated filter,” which serves as both the low-pressure filter 332 and the high-pressure filter 330 of the prior art fuel pump shown in FIG. 31 .
  • the front-end filter 85 also includes a filter case 95 and a filter element 96 .
  • the filter case 95 is made, for example, of a resin.
  • the filter case 95 has a generally tubular body 97 with a C-shaped cross section, within the hollow portion of which is provided the fuel pump 1 .
  • the filter case 95 has a top wall 99 , a bottom wall 100 (see FIG. 15 ), and end walls 101 (see FIG.
  • the filter case 95 is provided with an inlet path 102 , an outlet path 103 , and a guiding path 104 .
  • the inlet path 102 extends from a lower portion of the filter case body 97 in a radially inner direction (the right-hand direction in FIG. 15 ), connecting a lower portion of the filter compartment 98 with the inlet port 42 of the fuel pump 1 .
  • the downstream end of the inlet path 102 is provided with a path exit 106 , which opens upwardly and serves as a female port fitting and receives the inlet tube 43 of the fuel pump inlet port 42 as a male port.
  • the outlet path 103 includes a transverse tube portion 107 extending from a lower portion of the filter case body 97 in a radially inner direction (the left-hand direction in FIG. 15 ), and a longitudinal tube portion 108 , which continues from the outer end of the transverse tube portion 107 to form a generally L-shaped tube and extends in an upward direction along one end wall 101 of the filter case 95 (see FIG. 16 ).
  • the transverse tube portion 107 includes a path entrance 109 , which opens upwardly at the inner end thereof and serves as a female port fitting and receives the outlet tube 46 of the fuel pump first outlet port 45 as a male port (see FIG. 17 ).
  • the upper end of the longitudinal tube 108 of the outlet path 103 is connected with one end of the flexible connecting tube 110 .
  • the other end of the connecting tube 110 is connected with an internal-external communicating tube 89 provided through the set plate 88 .
  • the internal-external communicating tube 89 is connected with a fuel supply line 111 leading to an injector 112 (see FIG. 18 ) outside the fuel tank 92 .
  • the guiding path 104 is a branching line of the outlet path 103 . Also, as shown in FIG. 15 , the guiding path 104 is disposed generally parallel to the longitudinal tube 108 of the outlet path 103 .
  • the pressure regulator 86 is provided on the upper end of the guiding path 104 . As shown in FIGS. 15 and 16 , the pressure regulator 86 is disposed overlapping radially with respect to the fuel pump 1 and the front-end filter 85 .
  • the pressure regulator 86 includes a regulator housing 114 having an upper half member 114 a and a lower half member 115 .
  • the lower half member 115 is integrally formed on the upper end of the guiding path 104 . Components within the regulator housing 114 are incorporated into the lower half member 115 .
  • the filter element 96 is formed into a generally C-shaped cross sectional tube, which surrounds the outer periphery of the filter compartment 98 within the filter case 95 .
  • the filter element 96 is used for removing foreign particles drawn from within the reservoir cup 90 into the fuel pump 1 .
  • the filter element 96 is sealingly disposed surrounding the outer side opening of the filter compartment 98 of the filter case 95 .
  • the filter element 96 has a multilayer structure in which two filters consisting of an inner filter and an outer filter are radially overlayed in parallel with a predetermined clearance.
  • the outer filter is formed with a coarse filter material 116 such as a fabric filter sheet.
  • the inner filter is formed with a fine filter material 117 such as a paper filter.
  • the coarse filter material 116 initially removes relatively large particles contained in the fuel. Then, the fine filter material 117 removes the relatively small particles and the brush-wear particles or motor-generated particles.
  • the pressure regulator 86 receives an incoming flow of a pressurized fuel from the fuel pump first outlet port 45 through the guiding path 104 of the filter case 95 . Then, the pressure regulator 86 controls the pressure of the pressurized fuel discharged from the fuel pump 1 and drains an excess, pressurized fuel into the fuel tank 92 , or more specifically, into the reservoir cup 90 .
  • the jet pump 87 is described next. As shown in FIGS. 15 and 16 , the jet pump 87 is provided in a lower part of the side wall 91 of the reservoir cup 90 . Also, the jet pump 87 is provided with a fuel introducing port 120 opening upwardly, a fuel suction port 122 opening outside of the reservoir cup 90 , and an exhaust port 121 opening into the reservoir cup 90 . One end of the communicating tube 119 is connected to the second outlet tube 31 of the fuel pump 1 , while the other end of the communicating tube 119 is connected to the fuel introducing port 120 of the jet pump 87 , which is disposed within the reservoir cup 90 . This allows the fuel discharged from the second outlet port 30 to flow into the fuel introducing port 120 through the communicating tube 119 .
  • the fuel introduced from the fuel introducing port 120 creates a negative pressure within the jet pump 87 when discharged from the exhaust port 121 into the reservoir cup 90 .
  • the negative pressure draws fuel from outside of the reservoir cup 90 via the fuel suction port 122 .
  • the jet pump 87 discharges the mixed fuels from the exhaust port 121 into the reservoir cup 90 .
  • the jet pump 87 creates a pumping action to transfer fuel outside of the reservoir cup 90 into the jet pump 87 by using a fuel flow discharged from the second outlet port 30 of the fuel pump 1 as a driving source.
  • the basic configuration of a jet pump 87 is well known, the details thereof will not be described herein.
  • the operation of the above-mentioned fuel supply system 84 is described.
  • fuel within the reservoir cup 90 begins to flow.
  • the fuel is filtered through the filter element 96 within the front-end filter 85 and flows into the filter compartment 98 .
  • the fuel is drawn into the pump section 3 from the inlet port 42 of the fuel pump 1 .
  • the fuel is discharged from the first outlet port 45 to the outlet path 103 within the filter case 95 .
  • the pressurized fuel flows into the outlet path 103 and is eventually fed into the injector 112 (see FIG. 18 ) from the fuel supply line 111 outside of the set plate 88 via the connecting tube 110 .
  • the injector 112 may be referred to as a target for the fuel to flow to.
  • the pressure regulator 86 communicates with the outlet path 103 via the guiding path 104 , the pressure of the pressurized fuel flowing into the outlet path 103 within the filter case 95 is controlled by the pressure regulator 86 so as to maintain a predetermined pressure. During the pressure control, excess, highly pressurized fuel is drained from the pressure regulator 86 into the reservoir cup 90 . On the other hand, the fuel outside the reservoir cup 90 but within the fuel tank 92 is transferred into the reservoir cup 90 by the jet pump 87 using the fuel flow discharged from the second outlet port 30 of the fuel pump 1 as a driving source.
  • the coarse filter material 116 firstly removes relatively large particles (referred to as ⁇ in FIG. 18 ), and then the fine filter material 117 removes relatively small particles (referred to as ⁇ in FIG. 18 ). Furthermore, even if a fuel containing brush-wear particles or motor-generated particles (referred to as ⁇ in FIG. 18 ) is discharged from the second outlet port 30 so as to flow into the jet pump 87 via the communicating tube 119 and then to pass through the coarse filter material 116 within the filter element 96 of the front-end filter 85 . The motor-generated particles are ultimately removed with the fine filter material 117 . This reduces or prevents motor-generated particles (referred to as ⁇ in FIG. 18 ) from being drawn into the fuel pump 1 .
  • the seventh representative fuel supply system 84 can discharge a fluid without motor-generated particles from the first outlet port 45 , and can also cool the motor section 2 and lubricate sliding portions with the fluid.
  • the front-end filter 85 removes foreign particles, especially small particles (referred to as ⁇ in FIG. 18 ) and motor-generated particles (referred to as ⁇ in FIG. 18 ), in the fuel drawn into the fuel pump 1 .
  • Such small particles adversely affect the sliding portions of the fuel pump 1 . Therefore, it is possible to reduce or prevent trouble with the sliding portions so as to increase the electric motor life.
  • the prior art fuel pump 201 allows the small particles, having already passed through the low-pressure filter 332 , to pass further through the pump section 203 and the motor section 202 so that the life of the sliding portions in the fuel pump 201 may be largely reduced.
  • the front-end filter 85 removes foreign particles, especially small particles (referred to as ⁇ in FIG. 18 ) and motor-generated particles (referred to as ⁇ in FIG. 18 ) in the fuel drawn into the fuel pump 1 .
  • small particles would otherwise adversely affect the sliding portions of the fuel pump 1 . Therefore, it is possible to reduce or prevent trouble with the sliding portions so as to increase the fuel pump life.
  • the fuel supply system 1 is provided with the jet pump 87 driven by the fluid flow discharged from the second outlet port 30 of the fuel pump 1 in order to transfer the fuel outside of the reservoir cup 90 but within the fuel tank 92 into the reservoir cup 90 (see FIGS. 15 and 16 ). Therefore, it is possible to effectively use the pressure energy of the fuel flow discharged from the second outlet port 30 of the fuel pump 1 .
  • the front-end filter 85 includes the filter element 96 with a multilayer structure in which the outer layer is coarse while the inner layer is fine (see FIGS. 15 and 16 ). This allows the front-end filter element 96 to effectively remove foreign particles in the fuel drawn into the fuel pump 1 .
  • the front-end filter 85 has the filter element 96 formed substantially cylindrically so as to surround the fuel pump 1 . This allows the filtering area of the filter element 96 to be increased so that the suction resistance is reduced. Therefore, it is possible to reduce the electric current consumption of the fuel pump 1 .
  • the fuel supply system 1 has a pressure regulator 86 controlling the fuel pressure of the fuel discharged from the fuel pump 1 (see FIGS. 15 and 16 ). Also, the pressure regulator 86 is disposed overlapping radially with respect to the fuel pump and the front-end filter (see FIGS. 15 and 16 ). Therefore, it is possible to compactly provide the fuel supply system 84 with the pressure regulator 86 .
  • the filter case 95 is integrally formed with the lower half member 115 of the regulator housing 114 of the pressure regulator 86 (see FIG. 15 ). Due to this, the lower half member 115 or at least a portion of the regulator housing 114 of the pressure regulator 86 does not need to be provided separately. Therefore, it is possible to make the pressure regulator 86 simplified and lightweight.
  • the front-end filter 85 is provided with the outlet path 103 directly connected with the first outlet port 45 of the fuel pump 1 .
  • a dedicated component forming the outlet path 103 is not required. This makes it possible to make the fuel supply system 84 compact and lightweight, and reduce the manufacturing cost.
  • the inlet tube 43 of the fuel pump 1 is connected with the inlet path exit 106 of the front-end filter 85 , in a fitting structure with a male port and a corresponding female port. This allows the connecting operation between the inlet port 42 of the fuel pump 1 and the inlet path 102 of the front-end filter 85 to be easily performed.
  • the fuel pump outlet tube 46 is connected with the outlet path entrance 109 of the front-end filter 85 in a fitting structure with a male port and a corresponding female port. This allows the connecting operation between the fuel pump first outlet port 45 and the outlet path 103 of the front-end filter 85 to be performed easily.
  • the fuel pump inlet port 42 is used as a corresponding male port, while the inlet path 102 of the front-end filter 85 is used as a female port, in such a manner that the front-end filter inlet path exit 106 fittingly receives the fuel pump inlet tube 43 .
  • the outlet path 103 of the front-end filter 85 is used as a female port, while the fuel pump first outlet port 45 is used as a corresponding male port, in such a manner that the front-end filter inlet path entrance 109 fittingly receives the fuel pump outlet tube 46 .
  • the fitting structure shown in FIG. 17 may be modified within the scope of the present invention.
  • the inlet path exit 106 includes an exit tube 123 as a male port, while the fuel pump inlet port 42 is used as a corresponding female port, in such a manner that the fuel pump inlet tube 43 fittingly receives the front-end filter inlet exit 123 .
  • the outlet path entrance 103 is provided with an entrance tube 125 as a male port, while the fuel pump outlet tube 46 is used as a corresponding female port, in such a manner that the outlet tube 46 of the fuel pump first outlet port 45 fittingly receives the front-end filter outlet path entrance tube 125 .
  • sealing members 126 are interposed between the fuel pump 1 and the front-end filter 85 . More specifically, on one hand, the rubber sealing member 126 is formed in a ring shape and is sandwiched between the pump cover 8 around the inlet port 42 and the top surface around the inlet path exit 106 of the front-end filter case 95 . Similarly, such a sealing member 126 is also sandwiched between the pump cover 8 around the outlet tube 46 and the top surface around the outlet path entrance 109 of the front-end filter case 95 .
  • the jet pump 87 shown in 15 , 16 , and 18 may be eliminated.
  • the jet pump 87 not only the jet pump 87 , but also the communicating tube 119 may be eliminated.
  • the eighth representative fuel supply system is a modification of the seventh representative fuel supply system.
  • the eighth representative fuel supply system is modified in that the lower half member 115 of the front-end filter case 95 according to the seventh representative embodiment (see FIG. 15 ) is replaced by a mounting recess 128 .
  • the mounting recess 128 is formed at the upper end of the guiding path 104 of the filter case 95 .
  • the pressure regulator (designated as reference numeral 86 A) fits downwardly into the mounting recess 128 . It is to be noted that the pressure regulator 86 A may be made as a discrete component apart from the filter case 95 . This allows the pressure regulator to be easily fitted into the filter case 95 and enhances the modularity of the fuel supply system 84 .
  • the ninth representative fuel supply system is a modification of the seventh representative fuel supply system.
  • the ninth representative fuel supply system is modified in that the fuel pump 1 of the seventh representative fuel supply system 84 (see FIG. 15 ) is replaced by the sixth representative fuel pump 1 with the jet pump 80 (see FIG. 14 ).
  • the ninth representative fuel supply system is provided with a returning tube 130 and a introducing tube 132 , which are connected with the jet pump 80 provided on the fuel pump 1 .
  • the jet pump 80 of the fuel pump 1 is provided with the exhaust port 81 , which is connected to one end of the returning tube 130 .
  • the other end of the returning tube 130 opens toward the bottom of the reservoir cup 90 .
  • the suction port 82 of the jet pump 80 is connected to one end of the introducing tube 132 .
  • the other end of the introducing tube 132 opens toward the bottom of the fuel tank 92 , outside of the reservoir cup 90 .
  • the fuel outside the reservoir cup 90 but within the fuel tank 92 is drawn into the jet pump 80 via the introducing tube 132 by the jet pump 80 using the fuel flow discharged from the fuel pump second outlet port 30 (also see FIG. 14 ) as a driving source. Then, the fuel is discharged from the exhaust port 81 and transferred into the reservoir cup 90 via the returning tube 130 . Therefore, it is possible to effectively use the pressure energy of the fuel flow discharged from the second outlet port 30 of the fuel pump 1 .
  • a fuel supply system according to a tenth representative embodiment (hereinafter referred to as a “tenth representative fuel supply system”) will be described.
  • the tenth representative fuel supply system is a modification of the seventh representative fuel supply system. It is to be noted that the pressure regulator 86 , the jet pump 87 , the outlet path 103 , and the guiding path 104 (see FIG. 15 ) are not shown in FIG. 26 for the convenience of explanation.
  • the filter case 95 of the tenth representative fuel supply system 84 is provided with an annular cross-sectional filter compartment 98 A.
  • the annular filter compartment 98 A has a multilayer filter element 96 A consisting of an outer filter or a coarse filter material 116 A and an inner filter or a fine filter material 117 A.
  • the filter element 96 A surrounds the fuel pump 1 located within the front-end filter element 96 A, generally along the entire periphery of the fuel pump 1 . This allows the front-end filter element 96 A to effectively remove foreign particles in a fuel drawn into the fuel pump 1 in the direction shown by the arrows. Also, since the filtering area of the filter element 96 A is increased more than the seventh representative fuel supply system, the fuel suction resistance of the fuel pump 1 may be more reduced. Therefore, it is possible to further reduce the electric current consumption of the fuel pump 1 .
  • the eleventh representative fuel supply system is a modification of the seventh representative fuel supply system.
  • the fuel pump 1 of the eleventh representative fuel supply system is modified in that the communicating opening 48 of the pump housing 9 according to the seventh representative embodiment (see FIG. 20 ) is provided with a check valve or a ball member 157 .
  • the lower and central portion of the communicating opening 48 is provided with a valve seat 158 that is closed or opened by the ball member 157 .
  • the upper portion of the communicating opening 48 is provided with a ball stopper 159 , for example, formed as a C-shaped ring.
  • the ball stopper 159 prevents the ball member 157 from ejecting out of the communicating opening 48 .
  • the check valve 157 is opened at the valve seat 158 and permits the fuel to be discharged into the motor compartment 10 .
  • the check valve 157 is closed at the valve seat 158 and prevents the backflow of the fuel.
  • the eleventh representative fuel supply system is a modification of the seventh representative fuel supply system.
  • the fuel pump 1 of the twelfth representative fuel supply system is modified in that the upper portion of the inlet path exit 106 in the front-end filter case 95 is provided with an annular recess 106 a .
  • a sealing member such as reference numeral 126
  • a resilient O-ring which radially seals the fuel pump inlet tube 43 to the filter case inlet path exit 106 .
  • the upper portion of the outlet path entrance 109 in the front-end filter case 95 is provided with an annular recess 109 a .
  • a sealing member such as reference numeral 126
  • a resilient O-ring which radially seals the fuel pump outlet tube 46 to the filter case outlet path entrance 109 .
  • the thirteenth representative fuel supply system is a modification of the seventh representative fuel supply system.
  • the thirteenth representative fuel supply system is modified in that the front-end filter 85 of the seventh representative fuel supply system 84 (see FIG. 15 ) is replaced by a so-called suction filter.
  • the suction filter is similar to the low-pressure filter 332 according to the prior art fuel supply system 284 shown in FIG. 31 , and is herein referred to as a front-end filter 135 .
  • the thirteenth representative fuel supply system 84 is displaced within the fuel tank 92 as shown in FIG. 29 . Also, the reservoir cup 90 and the jet pump 87 of the seventh representative fuel supply system 84 shown in FIG. 15 are eliminated. In this case, the fuel tank 92 may be referred to as a reservoir.
  • the front-end filter 135 includes a filter material 136 , which has a multilayer structure similar to the filter element 96 of the seventh representative fuel supply system.
  • the filter material 136 removes relatively large particles, relatively small particles, and brush-wear particles contained in a fuel.
  • the front-end filter 135 is provided with a mounting port 137 including a path entrance 146 .
  • the path entrance 146 serves as a female port which can fittingly receive a fuel pump inlet tube 43 as a corresponding male port.
  • the bottom surface of the set plate 88 is connected with a connecting tube 140 forming an outlet path 143 leading to an internal-external communicating tube 89 .
  • the connecting tube 140 includes a longitudinal tube portion 148 extending downwardly from the set plate 88 and a transverse tube portion 147 continuing transversely from the lower end of the longitudinal tube portion 148 to form a generally L-shaped tube.
  • the transverse tube portion 147 includes a path entrance 149 , which opens upwardly at the end in proximity to the fuel pump 1 .
  • the path entrance 149 serves as a female port, which fittingly receives the fuel pump outlet tube 46 as a corresponding male port.
  • the connecting tube 140 is integrally provided with a mounting port 137 of the front-end filter 135 .
  • the longitudinal tube portion 148 of the connecting tube 140 is provided with a pressure regulator 86 at the lower end wall of the longitudinal tube portion 148 .
  • the pressure regulator 86 controls the pressure of the pressurized fuel discharged from the fuel pump 1 and drains excess, pressurized fuel into the fuel tank 92 .
  • the fuel pump 1 is provided with a cover member 150 surrounding the periphery of the fuel pump 1 .
  • the operation of the above-mentioned fuel supply system 84 is as follows.
  • the fuel pump 1 When the fuel pump 1 is activated, the fuel within the fuel tank 92 begins to flow.
  • the fuel is filtered through a filter element 136 within the front-end filter 135 , and then is drawn into the pump section 3 .
  • the fuel After pressurization in the pump section 3 , the fuel is discharged to the outlet path 143 of the connecting tube 140 .
  • the pressurized fuel discharged to the outlet path 143 is fed from the internal-external communicating tube 89 of the set plate 88 into the injector via a fuel supply line 111 .
  • the pressure regulator 86 since the pressure regulator 86 also communicates with the outlet path 143 , the pressure of the pressurized fuel flowing into the outlet path 143 of the connecting tube 140 is controlled by the pressure regulator 86 so as to be a predetermined pressure. During the pressure control, excess, highly pressurized fuel is drained from the pressure regulator 86 into the fuel tank 92 .
  • the fuel pump according to the present invention may be generally applicable to other pumps in addition to a fuel pump.
  • the present invention may be applicable to multistage pumps including a plurality of impellers 34 .
  • the present invention is applicable not only to a returnless fuel supply system 84 , but also to a fuel supply system returning excess fuels from the engine side to the fuel tank 92 .
  • at least one of the inlet port 42 , the first outlet port 45 , the second outlet port 30 , communicating opening 48 , and the vapor vent 76 of the fuel pump 1 may include a plurality of ports or openings.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US11/188,774 2004-07-28 2005-07-26 Electric pump and modularized fuel supply system with such electric pump Abandoned US20060024176A1 (en)

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JP2004220108A JP2006037870A (ja) 2004-07-28 2004-07-28 電動ポンプ及びその電動ポンプを備えた燃料供給装置
JP2004-220108 2004-07-28

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US20080085199A1 (en) * 2006-10-04 2008-04-10 Denso Corporation Fuel pump
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US20080298985A1 (en) * 2007-06-01 2008-12-04 Ti Group Automotive Systems, L.L.C. Fuel pump assembly for a fuel pump module
US20080316436A1 (en) * 2006-10-05 2008-12-25 Nec Display Solutions, Ltd. Pump Unit and Projector Using Same
US7617814B2 (en) 2008-03-06 2009-11-17 Synerject, Llc Fuel pump module having a direct mounted jet pump and methods of assembly
US20090304527A1 (en) * 2006-05-01 2009-12-10 Siemens Vdo Automotive Corporation Fuel pump with inner channel priming
US20100202901A1 (en) * 2009-02-12 2010-08-12 Diversified Dynamics Corporation Self lubricating pump
US20110200472A1 (en) * 2010-02-12 2011-08-18 Leppert Kevin L Integrated fuel delivery module and methods of manufacture
US8286802B2 (en) 2008-01-18 2012-10-16 Synerject, Llc In-tank fuel delivery module having an accessible fuel filter
US9004884B2 (en) 2011-03-08 2015-04-14 Synerject Llc In-tank fluid transfer assembly
US20150194864A1 (en) * 2014-01-03 2015-07-09 Carter Fuel Systems, Llc Grounding Device for Brushless Electric Motor
US20150359639A1 (en) * 2014-06-17 2015-12-17 Titan Spine, Llc Corpectomy implants with roughened bioactive lateral surfaces
US9261096B2 (en) 2011-07-29 2016-02-16 Regal Beloit America, Inc. Pump motor combination
US20170227017A1 (en) * 2014-10-30 2017-08-10 Continental Automotive Gmbh Electrically driven pump
US9753443B2 (en) 2014-04-21 2017-09-05 Synerject Llc Solenoid systems and methods for detecting length of travel
US9997287B2 (en) 2014-06-06 2018-06-12 Synerject Llc Electromagnetic solenoids having controlled reluctance
US10041501B2 (en) 2016-04-13 2018-08-07 Aisan Kogyo Kabushiki Kaisha Vortex pump and fuel vapor treatment device comprising the vortex pump
US20180355873A1 (en) * 2015-11-24 2018-12-13 Aisan Kogyo Kabushiki Kaisha Vortex pump
CN109312751A (zh) * 2016-08-15 2019-02-05 皮尔伯格泵技术有限责任公司 机动车辅助动力单元真空泵
US10260490B2 (en) 2014-06-09 2019-04-16 Synerject Llc Methods and apparatus for cooling a solenoid coil of a solenoid pump
US10519831B2 (en) 2009-12-04 2019-12-31 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Delivery device for delivering a reducing agent and motor vehicle having a delivery device
US10989192B2 (en) 2016-01-12 2021-04-27 Pierburg Pump Technology Gmbh Automotive electrical oil pump

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BRPI0612100B1 (pt) * 2005-07-06 2019-01-22 Honda Motor Co Ltd bomba de combustível
KR101470210B1 (ko) * 2013-09-23 2014-12-05 현대자동차주식회사 연료펌프 시스템
JP2018009458A (ja) * 2016-07-11 2018-01-18 株式会社Ihi バイナリー発電システムおよび作動媒体ポンプ
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US20070065315A1 (en) * 2005-09-06 2007-03-22 Denso Corporation Fluid pump having bearing hold
US8011902B2 (en) * 2006-03-28 2011-09-06 Denso Corporation Drive control device of fuel pump
US20070286747A1 (en) * 2006-03-28 2007-12-13 Denso Corporation Drive control device of fuel pump
US8206126B2 (en) * 2006-05-01 2012-06-26 Continental Automotive Systems Us, Inc. Fuel pump with inner channel priming
US20090304527A1 (en) * 2006-05-01 2009-12-10 Siemens Vdo Automotive Corporation Fuel pump with inner channel priming
US20080085199A1 (en) * 2006-10-04 2008-04-10 Denso Corporation Fuel pump
US20080316436A1 (en) * 2006-10-05 2008-12-25 Nec Display Solutions, Ltd. Pump Unit and Projector Using Same
US8025412B2 (en) * 2006-10-05 2011-09-27 Nec Display Solutions, Ltd. Pump unit and projector using same
US20080107549A1 (en) * 2006-11-08 2008-05-08 Ti Group Automotive Systems, L.L.C. Fuel pump and filter assembly
US20080298985A1 (en) * 2007-06-01 2008-12-04 Ti Group Automotive Systems, L.L.C. Fuel pump assembly for a fuel pump module
US7874817B2 (en) * 2007-06-01 2011-01-25 Ti Group Automotive Systems, L.L.C. Fuel pump assembly with a vapor purge passage arrangement for a fuel pump module
US8286802B2 (en) 2008-01-18 2012-10-16 Synerject, Llc In-tank fuel delivery module having an accessible fuel filter
US7617814B2 (en) 2008-03-06 2009-11-17 Synerject, Llc Fuel pump module having a direct mounted jet pump and methods of assembly
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US10519831B2 (en) 2009-12-04 2019-12-31 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Delivery device for delivering a reducing agent and motor vehicle having a delivery device
US8360740B2 (en) 2010-02-12 2013-01-29 Synerject, Llc Integrated fuel delivery module and methods of manufacture
US20110200472A1 (en) * 2010-02-12 2011-08-18 Leppert Kevin L Integrated fuel delivery module and methods of manufacture
US9004884B2 (en) 2011-03-08 2015-04-14 Synerject Llc In-tank fluid transfer assembly
US9261096B2 (en) 2011-07-29 2016-02-16 Regal Beloit America, Inc. Pump motor combination
US20150194864A1 (en) * 2014-01-03 2015-07-09 Carter Fuel Systems, Llc Grounding Device for Brushless Electric Motor
US9680355B2 (en) * 2014-01-03 2017-06-13 Carter Fuel Systems, Llc Grounding device for brushless electric motor
US9753443B2 (en) 2014-04-21 2017-09-05 Synerject Llc Solenoid systems and methods for detecting length of travel
US9997287B2 (en) 2014-06-06 2018-06-12 Synerject Llc Electromagnetic solenoids having controlled reluctance
US10260490B2 (en) 2014-06-09 2019-04-16 Synerject Llc Methods and apparatus for cooling a solenoid coil of a solenoid pump
US20150359639A1 (en) * 2014-06-17 2015-12-17 Titan Spine, Llc Corpectomy implants with roughened bioactive lateral surfaces
US10323649B2 (en) * 2014-10-30 2019-06-18 Continental Automotive Gmbh Electrically driven pump
US20170227017A1 (en) * 2014-10-30 2017-08-10 Continental Automotive Gmbh Electrically driven pump
US20180355873A1 (en) * 2015-11-24 2018-12-13 Aisan Kogyo Kabushiki Kaisha Vortex pump
US10989192B2 (en) 2016-01-12 2021-04-27 Pierburg Pump Technology Gmbh Automotive electrical oil pump
EP3402989B1 (en) * 2016-01-12 2021-06-02 Pierburg Pump Technology GmbH Automotive electrical oil pump
US10041501B2 (en) 2016-04-13 2018-08-07 Aisan Kogyo Kabushiki Kaisha Vortex pump and fuel vapor treatment device comprising the vortex pump
CN109312751A (zh) * 2016-08-15 2019-02-05 皮尔伯格泵技术有限责任公司 机动车辅助动力单元真空泵
US11319966B2 (en) * 2016-08-15 2022-05-03 Pierburg Pump Technology Gmbh Motor vehicle auxiliary power unit vacuum pump

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DE102005035160A1 (de) 2006-03-23
JP2006037870A (ja) 2006-02-09
KR100704077B1 (ko) 2007-04-06
KR20060048789A (ko) 2006-05-18

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