US3871797A - Fuel pump for automobiles - Google Patents

Fuel pump for automobiles Download PDF

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Publication number
US3871797A
US3871797A US343037A US34303773A US3871797A US 3871797 A US3871797 A US 3871797A US 343037 A US343037 A US 343037A US 34303773 A US34303773 A US 34303773A US 3871797 A US3871797 A US 3871797A
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United States
Prior art keywords
runner
casing
fuel
shaft
pump
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Expired - Lifetime
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US343037A
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English (en)
Inventor
Osamu Igarashi
Yukio Hohsho
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Hitachi Ltd
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Hitachi Ltd
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Publication date
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    • 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
    • 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
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • 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
    • F02M2037/082—Details of the entry of the current supply lines into the pump housing, e.g. wire connectors, grommets, plugs or sockets

Definitions

  • a vortex pump comprising a casing having an annular groove and an inlet port and an outlet port respectively provided at both ends of said annular groove, and a DC. motor driven runner arranged opposite to said casing and having a plurality of chambers annularly disposed at an end face of the runner divided by radially extending vane portions. wherein the outlet port of said pump and the backside of the runner are communicated with each other to act the output fuel pressure of the pump on the back side of the runner and thereby to receive thrusts acting on the runner and maintain a gap between the run ner and the casing constant.
  • This invention relates to an electric motor driven fuel pump for automobiles which is suspended in fuel in a fuel tank of automobile.
  • peripheral pump As this type of fuel pump, a peripheral pump has generally been used (see, for example, US. Pat. No. 3,418,991).
  • the peripheral pump is advantageously used as a suspended-type fuel pump because it is small in size and inexpensive and provides a relatively high flow rate of fuel, but on the other hand, has the disadvantage that the rotational speed of the pump for obtaining the necessary flow rate of fuel is as high as 4,000 5,000 rpm. and noises aceompained by keen metallic sounds are generated during operation.
  • the object of the present invention is to provide a small-sized, inexpensive fuel pump operating at a low noise level and capable of discharging fuel at the necessary rate.
  • the feature of the present invention resides in the use of a vortex pump as fuel pump, which is so arranged that the thrusts occurring in the pump runner incident to pumping action is received by the output fuel pressure.
  • FIG. I is a vertical sectional view of one embodiment of the fuel pump according to the present invention.
  • FIG. 2 is an end view of the fuel pump partially in section taken on the line llll of FIG. 1;
  • FIG. 3 is a sectional view of the fuel pump taken on the line III-III of FIG. 1;
  • FIG. 4 is a graph showing in comparison the characteristics of a vortex pump and a peripheral pump
  • FIG. 5 is a graph showing the relationship between the gap between the casing and runner of the vortex pump and the pump output.
  • FIG. 6 is a vertical sectional view of the essential portion of another embodiment of the invention.
  • the fuel pump has a housing I enclosing the entire fuel pump, which consists of a zinc-plated iron cylinder and serves simultaneously as the yoke of a motor.
  • This housing 1 is set at the bottom of a fuel tank.
  • a casing 2 In the housing I are disposed a casing 2, a magnet 4 and a bracket 5.
  • a runner 3 is arranged in opposed relation to the casing 2 and a shaft 6 supporting the armature 2] of the motor is press-fitted into said runner 3.
  • the shaft 6 is journaled in a bearing hole 22 formed in the casing 2 and a shaft 6' on the other side of the armature 21 is journaled in a bearing hole 18 formed in the bracket 5. Since the shafts 6, 6' are respectively supported by the bearing holes 18, 22 of simple shape as shown, said shafts 6, 6' and the armature 21 are slidable in the axial direction.
  • the casing 2 and runner 3 respectively are formed with a circumferential groove 7, and a plurality of chambers l5 each having a semicircular cross section, which defines a doughnut-shaped space when put together.
  • the casing 2 is provided with an outlet port 9 and an inlet port 10 communicating with the outside of the pump.
  • the outlet port 9 is connected to the radially outer side of the groove 7 and the inlet port I0 to the radially inner side of said groove 7.
  • a land 11 At a narrow portion between the outlet port 9 and inlet port 10 of the groove 7 is formed a land 11 by which said portion of the groove is filled and the outlet port 9 and inlet port 10 are spaced from each other.
  • a short channel I2 is formed in the casing 2 extending radially outwardly from a portion of the surface of the groove 7 adjacent the outlet port 9, and this channel I2 is communicated with a channel 13 formed in the outer portion of said casing 2 in the widthwise direction.
  • the channel [3 is communicating with the inside of the magnet 4 through the motor side of the runner 3.
  • the runner 3 is provided with a plurality of chambers annularly disposed on one end face thereof and a plurality of vane portions 14 disposed at a certain interval therealong.
  • the area of each chamber 15 defined by the adjacent vane portions 14 and outer and inner sur faces of each chamber 15 is made smaller than that of [and 11, so that the chamber I5. may be out of communication with the groove 7 at the land 11.
  • the bracket 5 has disposed therein brushes 17 in contact with a commutator 20 and springs 16 respectively urging said brushes 17 into contact with the com mutator 20, and is provided with the motor bearing hole 18 at the center thereof. Further, a narrow channel 19 is provided in the bracket 5 extending axially from the outer end of the bearing hole 18 to the outside, which constitutes a fuel relief passage. Instead of forming the fuel relief passage by the bearing hole 18 and channel 19, a separate channel 25 may be formed in the bracket 5 to release fuel directly from the pump to the outside.
  • the motor driven fuel pump of the construction described above will operate in fuel in the following manner:
  • the fuel flows into the pump through the inlet port I0, passes in the groove 7 in the axial direction of the motor and moves into the chambers 15 of the runner 3.
  • the fuel undergoes a circumferential force imparted by the vanes 14 and a centrifugal force is created in the fuel.
  • the fuel passes in the groove 7, chamber 15 while spiraling therein and being pressurized incident to the rotation of the runner 3, and reaches the outlet port 9. Since the outlet port 9 is isolated from the inlet port I0 by the land 11, a pressure differential occurs between the outlet port 9 and inlet port 10 and the fuel is discharged from the outlet port 9 with high pressure.
  • the fuel thus discharged is supplied to a carburetor (not shown) through a pipe and thence to an engine in a metered quantity.
  • a demanded flow rate of fuel can be obtained at a relatively low speed of rotation of the pump.
  • FIG. 4 is shown a comparison between the characteristics of the vortex pump A of the invention and a conventional peripheral pump B. In either pump, the outer diameter of the runner is 30 mm. It will be seen that with the vortex pump of the invention a fuel supply at the rate of 2,000 cc/min normally required for automobile fuel pump can be obtained at the rate of rotation of about 2,000 r.p.m. which is about half of that of the peripheral pump at which the same rate of fuel supply is obtained. This is of great advantage in respect of noise reducing effect. Namely, the oil slashing noises generated by the runner and the noises of collision between the runner and casing clue to fluctuation of the runner proper can be substantially reduced.
  • the fuel flows also into the channel 12 with high pressure and pushes the runner from the backside.
  • spiral flows of fuel occurs in the groove 7, chambers as indicated by the arrows in FIG. 1 and, as a reaction of these spiral flows, thrusts occur in the runner 3 urging said runner towards the motor.
  • thrusts are borne by the counter-acting pressure of fuel introduced on the backside of the runner 3 through the channel 12 and the biasing forces of the springs 16.
  • This counteracting pressure of fuel is substantially equal to the fuel pressure in the outlet port 9, and the force determined by the product of this fuel pressure and the backside area of the runner 3 plus the biasing forces of the springs 16 is balanced with the thrust occurring in the runner 3, whereby the gap G between the runner 3 and easing 2 is maintained constant.
  • this gap G is preferably within the range of about 0.1 0.2 mm. This is because, in this type of pump, the gap G and the pump output are in the relation shown in FIG.
  • the thrust acting on the runner can be borne by a simple construction, i.e., by leading a portion of the output fuel pressure of the pump to the backside of the runner. It is also possible by the construction to minimize the contact pressure of the brushes. Strictly speaking, the fuel, though in a very small amount, leaks from a gap between the outer periphery of the runner 3 and the casing, but the pressure of such leaking fuel is insufficiently high.
  • the channels 12, 13 in the present invention are provided for making positive use of the fuel pressure and, therefore, must be of a certain size. For instance, when the outer diameter of the runner is 30 mm, the diameter of the channels l2, 13 are necessarily in the range of about 0.8 1.0
  • the fuel flowing into the motor from the backside of the runner discharges to the outside of the pump through the bearing hole 18 and channel 19 formed in the bracket, while cooling the motor and lubricating the bearing portions.
  • the construction of the invention is advantageous also in removing the metal dust resulting from wear of the brushes and thereby preventing a failure of electrical insulation. It is also to be noted that the fuel pressure acting on the backside of the runner 3 can be adjusted by the pressure relief channel 25 when said channel is provided.
  • gap adjusting means such as a washer
  • gap adjusting means may be interposed between the runner and casing.
  • FIG. 6 Another embodiment of the invention having such means is shown in FIG. 6.
  • a thrust washer 24 is disposed in a space defined by cutouts 23 formed in the runner 3 and easing 2. This thrust washer is set free relative to the runner 3, the casing 2 and the shaft 6, but is machined in an exact thickness so as to maintain exactly the gap G between the casing 2 and runner 3.
  • the force applied to the shaft 6, i.e., the fuel pressure acting on the runner and the biasing forces of the springs, is transmitted to the casing 2 through the washer 24, so that the binding of the end face of the shaft 6 in the bearing hole, otherwise occurring, under the strong pressure, can be avoided.
  • a fuel pump for automobiles suspended in a fuel tank and used for supplying fuel in the fuel tank to the carburetor of the like, comprising a casing having an inlet port and an outlet port at the opposite ends of an annular groove formed therein, a runner having formed at an end face thereof a plurality of annularly disposed chambers opposed by the annular groove said casing and having a shaft press-fitted into the center thereof, means for axially movably supporting one end of said shaft in said casing, a D. C. motor having an armature integral with said shaft, another shaft provided on that side of said D. C.
  • a fuel pump for automobiles as claimed in claim 1, wherein bearing holes of simple shapes are respectively provided in the casing and bracket as the means for supporting the shafts in said casing and bracket.
  • a fuel pump for automobiles as claimed in claim 2, wherein a thrust washer is disposed in a space defined by cutouts respectively formed in the confronting faces of the runner and easing at locations radially inwardly of the respective annular grooves, and the thickness of said thrust washer is selected such that the axial gaps formed between said thrust washer and said runner and easing will become equal to the adequate gap between the runner and easing at the annular grooves.
  • a fuel pump for automobiles as claimed in claim 2, wherein said further passage means is provided in said bracket and communicates with the bearing hole provided therein.
  • a fuel pump for automobiles suspended in a fuel tank and used for supplying fuel in the fuel tank to a carburetor or the like, comprising a casing having an inlet port and an outlet port at the opposite end of an annular groove formed therein, a runner having formed at an end face thereof a plurality of annularly disposed chambers opposed by the annular groove of said casing and having a shaft press-fitted into the center thereof, means for axially movably supporting one end of said shaft in said casing, a D. C. motor having an armature integral with said shaft, another shaft provided on that side of said D. C. motor opposite to said first shaft, means for axially movably supporting said another shaft in a bracket, spring means for urging said armarunner and said casing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US343037A 1972-03-22 1973-03-20 Fuel pump for automobiles Expired - Lifetime US3871797A (en)

Applications Claiming Priority (1)

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JP47028161A JPS4895603A (enrdf_load_stackoverflow) 1972-03-22 1972-03-22

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231718A (en) * 1977-09-15 1980-11-04 Robert Bosch Gmbh Fluid pump, particularly a fuel supply pump
DE3209763A1 (de) * 1981-03-20 1982-12-16 Nippondenso Co., Ltd., Kariya, Aichi Elektrisch betriebene brennstoffpumpvorrichtung
US4447187A (en) * 1982-02-02 1984-05-08 Webasto-Werk W. Baier Gmbh & Co. Lateral-duct fan
US4451213A (en) * 1981-03-30 1984-05-29 Nippondenso Co., Ltd. Electrically operated fuel pump device having a regenerative component
US4508492A (en) * 1981-12-11 1985-04-02 Nippondenso Co., Ltd. Motor driven fuel pump
US4556363A (en) * 1982-06-21 1985-12-03 Nippondenso Co., Ltd. Pumping apparatus
US4591311A (en) * 1983-10-05 1986-05-27 Nippondenso Co., Ltd. Fuel pump for an automotive vehicle having a vapor discharge port
US4989411A (en) * 1988-12-22 1991-02-05 Allied-Signal Inc. Over the shaft fuel pumping system
US5022228A (en) * 1988-12-22 1991-06-11 Allied-Signal Inc. Over the shaft fuel pumping system
US5064342A (en) * 1990-04-17 1991-11-12 Mitsubishi Denki Kabushiki Kaisha In-tank type motor-operated pump
US5205707A (en) * 1990-03-28 1993-04-27 Coltec Industries Inc. Ioric pump with cast impeller housing requiring three machined surfaces and one central piloting bore to control critical tolerances
US5328325A (en) * 1990-06-28 1994-07-12 Robert Bosch Gmbh Peripheral pump, particularly for delivering fuel from a storage tank to the internal combustion engine of a motor vehicle
US5569023A (en) * 1993-08-12 1996-10-29 Hitachi, Ltd. Vortex blower
FR2770586A1 (fr) * 1997-11-03 1999-04-30 Walbro Corp Pompe de carburant a canal lateral et moteur electrique
US20030185693A1 (en) * 2002-03-28 2003-10-02 Eiji Iwanari Fuel pump having brushes and method of manufacturing the same
US20050249581A1 (en) * 2004-05-10 2005-11-10 Visteon Global Technologies, Inc. Fuel pump having single sided impeller
US20050249617A1 (en) * 2004-05-10 2005-11-10 Visteon Global Technologies, Inc. Fuel pump having single sided impeller
US20070196207A1 (en) * 2004-03-31 2007-08-23 Yonehara Giken Co., Ltd. Pressurizing centrifugal pump
WO2008049900A1 (en) * 2006-10-27 2008-05-02 Delphi Technologies, Inc. Fuel delivery module
US20110280718A1 (en) * 2007-12-21 2011-11-17 Yonehara Giken Co., Ltd. Pressurizing centrifugal pump
US20130046436A1 (en) * 2011-08-19 2013-02-21 Federal-Mogul Corporation Electric fuel pump tester and method
DE10223757B4 (de) * 2001-05-29 2017-08-03 Denso Corporation Kontaktelementschutz bei einem Elektromotor

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1619286A (en) * 1921-06-01 1927-03-01 Arthur W Burks Pump
US3160108A (en) * 1962-08-27 1964-12-08 Allis Chalmers Mfg Co Thrust carrying arrangement for fluid handling machines
US3180267A (en) * 1962-06-11 1965-04-27 Gen Motors Corp Pump-motor structures and assembly method
US3259072A (en) * 1964-10-26 1966-07-05 Gen Motors Corp Rotary fuel pump
US3395853A (en) * 1965-12-29 1968-08-06 Rotron Mfg Co Vortex compressor
US3418991A (en) * 1967-06-12 1968-12-31 Gen Motors Corp Vehicle fuel system
US3545890A (en) * 1967-12-29 1970-12-08 Mechanical Tech Inc Regenerative compressor
US3658444A (en) * 1970-05-20 1972-04-25 Holley Carburetor Co Holley fuel pump
US3676025A (en) * 1970-04-23 1972-07-11 Tokheim Corp Electrical in-tank fuel pump
US3720372A (en) * 1971-12-09 1973-03-13 Gen Motors Corp Means for rapidly heating interior of a motor vehicle

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1619286A (en) * 1921-06-01 1927-03-01 Arthur W Burks Pump
US3180267A (en) * 1962-06-11 1965-04-27 Gen Motors Corp Pump-motor structures and assembly method
US3160108A (en) * 1962-08-27 1964-12-08 Allis Chalmers Mfg Co Thrust carrying arrangement for fluid handling machines
US3259072A (en) * 1964-10-26 1966-07-05 Gen Motors Corp Rotary fuel pump
US3395853A (en) * 1965-12-29 1968-08-06 Rotron Mfg Co Vortex compressor
US3418991A (en) * 1967-06-12 1968-12-31 Gen Motors Corp Vehicle fuel system
US3545890A (en) * 1967-12-29 1970-12-08 Mechanical Tech Inc Regenerative compressor
US3676025A (en) * 1970-04-23 1972-07-11 Tokheim Corp Electrical in-tank fuel pump
US3658444A (en) * 1970-05-20 1972-04-25 Holley Carburetor Co Holley fuel pump
US3720372A (en) * 1971-12-09 1973-03-13 Gen Motors Corp Means for rapidly heating interior of a motor vehicle

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231718A (en) * 1977-09-15 1980-11-04 Robert Bosch Gmbh Fluid pump, particularly a fuel supply pump
DE3209763A1 (de) * 1981-03-20 1982-12-16 Nippondenso Co., Ltd., Kariya, Aichi Elektrisch betriebene brennstoffpumpvorrichtung
US4493620A (en) * 1981-03-20 1985-01-15 Nippondenso Co., Ltd. Electrically operated fuel pump device
US4451213A (en) * 1981-03-30 1984-05-29 Nippondenso Co., Ltd. Electrically operated fuel pump device having a regenerative component
US4508492A (en) * 1981-12-11 1985-04-02 Nippondenso Co., Ltd. Motor driven fuel pump
US4447187A (en) * 1982-02-02 1984-05-08 Webasto-Werk W. Baier Gmbh & Co. Lateral-duct fan
US4556363A (en) * 1982-06-21 1985-12-03 Nippondenso Co., Ltd. Pumping apparatus
US4591311A (en) * 1983-10-05 1986-05-27 Nippondenso Co., Ltd. Fuel pump for an automotive vehicle having a vapor discharge port
US4989411A (en) * 1988-12-22 1991-02-05 Allied-Signal Inc. Over the shaft fuel pumping system
US5022228A (en) * 1988-12-22 1991-06-11 Allied-Signal Inc. Over the shaft fuel pumping system
US5205707A (en) * 1990-03-28 1993-04-27 Coltec Industries Inc. Ioric pump with cast impeller housing requiring three machined surfaces and one central piloting bore to control critical tolerances
US5064342A (en) * 1990-04-17 1991-11-12 Mitsubishi Denki Kabushiki Kaisha In-tank type motor-operated pump
US5328325A (en) * 1990-06-28 1994-07-12 Robert Bosch Gmbh Peripheral pump, particularly for delivering fuel from a storage tank to the internal combustion engine of a motor vehicle
US5569023A (en) * 1993-08-12 1996-10-29 Hitachi, Ltd. Vortex blower
FR2770586A1 (fr) * 1997-11-03 1999-04-30 Walbro Corp Pompe de carburant a canal lateral et moteur electrique
US6162012A (en) * 1997-11-03 2000-12-19 Walbro Corporation Force balanced lateral channel fuel pump
DE10223757B4 (de) * 2001-05-29 2017-08-03 Denso Corporation Kontaktelementschutz bei einem Elektromotor
US20030185693A1 (en) * 2002-03-28 2003-10-02 Eiji Iwanari Fuel pump having brushes and method of manufacturing the same
US7014432B2 (en) * 2002-03-28 2006-03-21 Denso Corporation Fuel pumping unit, with a plurality of commutator brush assemblies with engaging members for restricting brush movement toward the pump motor section
US7585147B2 (en) * 2004-03-31 2009-09-08 Yonehara Giken Co., Ltd. Pressurizing centrifugal pump
US20070196207A1 (en) * 2004-03-31 2007-08-23 Yonehara Giken Co., Ltd. Pressurizing centrifugal pump
US7008174B2 (en) 2004-05-10 2006-03-07 Automotive Components Holdings, Inc. Fuel pump having single sided impeller
US7267524B2 (en) 2004-05-10 2007-09-11 Ford Motor Company Fuel pump having single sided impeller
US20050249581A1 (en) * 2004-05-10 2005-11-10 Visteon Global Technologies, Inc. Fuel pump having single sided impeller
US20050249617A1 (en) * 2004-05-10 2005-11-10 Visteon Global Technologies, Inc. Fuel pump having single sided impeller
US20100047090A1 (en) * 2006-10-27 2010-02-25 Patrice Marx Fuel delivery module
EP1918567A1 (en) * 2006-10-27 2008-05-07 Delphi Technologies, Inc. Fuel delivery module
CN101529076B (zh) * 2006-10-27 2011-08-03 德尔菲技术公司 燃料输送模块
US8113796B2 (en) 2006-10-27 2012-02-14 Delphi Technologies, Inc. Fuel delivery module
WO2008049900A1 (en) * 2006-10-27 2008-05-02 Delphi Technologies, Inc. Fuel delivery module
US20110280718A1 (en) * 2007-12-21 2011-11-17 Yonehara Giken Co., Ltd. Pressurizing centrifugal pump
US20130046436A1 (en) * 2011-08-19 2013-02-21 Federal-Mogul Corporation Electric fuel pump tester and method
WO2013028440A3 (en) * 2011-08-19 2013-04-18 Federal-Mogul Corporation Electric fuel pump tester and method
US8494706B2 (en) * 2011-08-19 2013-07-23 Federal-Mogul Corporation Electric fuel pump tester and method

Also Published As

Publication number Publication date
JPS4895603A (enrdf_load_stackoverflow) 1973-12-07

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