US3556684A - Electromagnetically actuated fuel pump - Google Patents

Electromagnetically actuated fuel pump Download PDF

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Publication number
US3556684A
US3556684A US787775A US3556684DA US3556684A US 3556684 A US3556684 A US 3556684A US 787775 A US787775 A US 787775A US 3556684D A US3556684D A US 3556684DA US 3556684 A US3556684 A US 3556684A
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US
United States
Prior art keywords
pump
outlet
piston
valve
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US787775A
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English (en)
Inventor
Clement L Rouquette
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.)
Sev Marchal
S E V MARCHAL
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Sev Marchal
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Filing date
Publication date
Application filed by Sev Marchal filed Critical Sev Marchal
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Publication of US3556684A publication Critical patent/US3556684A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/04—Pumps peculiar thereto
    • 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
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/43—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel
    • F02M2700/4302—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit
    • F02M2700/438—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters
    • F02M2700/4388—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters with fuel displacement by a pump

Definitions

  • an electrical pump which may be used to supply the internal combustion engines of automotive vehicles, which pump comprises on the one hand a cylindrical body encircled by a coaxial electromagnetic coil, which coil is energized by a square wave voltage, the body of the pump being provided with two valves, one of which controls the inlet and the other the outlet of the pump, with the first valve closing and the second opening when a pressure is created inside the pump and on the other hand a piston made of a magnetic material slidably mounted inside the pump body, the piston being spring-biassed in a direction opposite to the one in which it is attracted by the said coil, and carrying on the inlet side a valve which closes when the piston is attracted by the coil.
  • This pump 1s p CC essentially characterized by the fact that the fuel being pumped, which passes out through the valve in the outlet zone of the pump, is delivered into a chamber having a wall formed by an elastic membrane, with the outlet pipe opening into said chamber and a return passage to the supply tank provided with a spring loaded valve responsive to a predetermined minimum pressure also opening into said chamber.
  • the elastic membrane is made of rubber coated cloth and is placed between the outlet chamber and an air cushion.
  • the valve in the return passage leading to the supply tank is adjustable.
  • the electromagnetic coil which encircles the pump body is supplied through a transistor circuit the components of which are mounted on a framework attached to the outlet chamber, which framework is sufficiently open to the air to ensure adequate cooling of the pump.
  • the interposition of an outlet chamber having an elastic membrane makes it possible to attenuate the pulses in the flow of fuel.
  • the presence of said pressure responsive valve in the return passage leading to the tank also makes it possible to limit the range of pressures obtained, so that the membrane and the valve cooperate to equalize the pressure delivered by the pump.
  • the adjustment of the spring-loaded pressure responsive valve makes it possible to determine the maximum fuel pressure delivered by the pump. It follows that a single pump of a standard type may be used to supply carburetors of different types requiring different maximum pressures.
  • the position which is preferably adopted for the transistor circuit which controls the pump is particularly advantageous from the point of view of the cooling of this circuit, for this circuit is in the output zone of the pump and the calories produced by the operation of the circuit may thus be carried off by the fuel pumped on.
  • the cooling of the circuit is independent of the output of the pump, since even the pump is producing no net output, the circulation of fuel through the outlet chamber continues at its normal rate because of the return passage leading to the supply tank. There is thus a cooperation between the location of the control circuit for the coil and the existence of the valved return passage to the supply tank.
  • FIG. 1 is an axial section taken through an electric pump according to the invention.
  • FIG. 2 shows the electrical control circuit through which the pump of FIG. 1 is supplied.
  • reference numeral 1 indicates the body of the pump which is encircled by a coaxial electromagnetic coil 2.
  • a steel piston 3 is slidably mounted in the body 1 and biassed upwardly (when the pump is positioned as shown in FIG. 1) by a spring 4 which is supported at its lower end. Upward movement of the piston is resisted by a spring 4a, and the piston is pierced by a passage 5, at the top of which is a conical valve member 6 which closes against the seat 7 and is not spring-biassed.
  • An inlet passage 8 is located at the top of the pump body and connects it to a supply tank.
  • This passage 8 opens into a chamber having an outlet controlled by a conical valve member 9 biassed against its seat 10 by a spring 11.
  • a valve member 12 biassed against its seat 13 by a spring 14.
  • the valve member 9 closes when the pressure inside the central chamber in the pump body becomes greater than atmospheric, at which time the valve mem ber 12 closes.
  • the valve member 12 controls the opening connecting the central chamber in the pump body, in which the piston 3 travels, to an outlet chamber 15.
  • This chamber is provided near its lower end with an elastic membrane 16, the edges of which are gripped between two parts of a shell fixed to the pump body.
  • the outlet passage 19 leads from the outlet chamber 15 to the carburetor of the motor.
  • Another passage 20 also leads from the outlet chamber 15 and is provided with calibrated valve comprising a ball 21, a spring 22, and a regulating screw 23.
  • the passage 20 is connected, through the calibrated valve, to a passage 24 which is in communication with the supply tank.
  • a compartment 25 made of a material which is a good conductor of heat, as is the part 18 itself. Inside this compartment 25 are the electrical components of the circuit shown schematically on FIG. 2. The assembly of these components is schematically represented in FIG. 1 by the block 26.
  • the compartment 25 is protected by a casing 27 provided at its bottom with ventilating holes 28.
  • FIG. 2 The supply circuit for the coil 2 of the device which has just been described is shown in FIG. 2. It will be seen that this circuit is connected across the battery 29 of the vehicle.
  • a transistor 30 is interposed between the positive pole of the battery 29 and one end of a coil 31, the other end of which is connected to the negative pole of the battery.
  • a switch 36 is positioned between the battery 29 and the transistor 30.
  • the base of the transistor 30 is connected to one of the ends of a coil 32, the other end of which is connected to the positive pole of the battery 29.
  • the coils 31 and 32 are positioned to be mutually inductive and constitute a unit which serves as the electromagnetic coil 2 of the pump, shown in FIG. 1.
  • the coil 31 may have 650 turns, when the coil 32 has 180.
  • a resistance 33 is positioned between the collector and the emitter of the transistor 30.
  • a resistor 35 is connected between the base of the transistor 30 and the negative pole of the battery 29.
  • a condenser 34 is connected in parallel across the terminals of the resistance
  • this device is as follows: When the switch 3 6 is closed, that is to say, in practice, when the ignition key is turned, the transistor 30, having a positively charged base, permits current to pass to the coil 31, which induces a current in the coil 31. This produces a voltage at the base of the transistor 30 which prevents the transistor 30 from remaining conductive. The current in the coil 31 is then cut off and the system becomes inactive until the base of the transistor 30 attains a voltage which permits it to become conductive again. It will be seen that this produces an intermittent energization of the coil 31. It follows that the coil 2 is supplied by a square wave current. It should be noted that the condensor 34 prevents disadvantages resulting from the interruption of the current in the coil 31 and the resistance 33 prevents surges at the terminals of the transistor 30.
  • the fuel forced into the outlet chamber 15 during the first step leaves that chamber through the passages 19 and 20.
  • the passage 19 leads to the carburetor of the motor which is to be supplied and the passage 20 is connected by the tube 24 to the supply tank.
  • the ball 21 of the valve controlling the passage 20 is pressed back.
  • the user can regulate the maximum pressure which may be attained in the outlet passage 19.
  • the elastic membrane 16 flexes under the pumping pressure so as to decrease the maximum pressure attained during the compression stage of the cycle. This elasticity is made possible by a cushion of air in the space 17.
  • An additional advantage of the pump according to the invention is that it permits the elimination of vapor through the return to the tank which might form vapor locks in the passages leading to the carburetor. In effect, this vapor returns to the tank through the passages 20 and 24 to the extent that its pressure is greater than the pressure for which the valve comprising the ball 21 and spring 22 is set.
  • an electromagnetically actuated fuel pump for pumping fuel from a fuel tank to a carburetor, which pump comprises a piston chamber having an inlet for connection to said tank and an outlet, a piston comprising magnetic material slidable in said piston chamber, an electrically energizable coil positioned to move said piston toward said outlet, and resilient means for returning said piston in the opposite direction when said coil is de-energized, the improvement which comprises a pressure-responsive valve in said outlet, an outlet chamber connected to said piston chamber by said outlet, a transistorized electrical circuit for intermittently energizing said coil, said circuit being mounted in a shell spaced by said outlet chamber from the remainder of said pump, a flexible diaphragm constituting at least part of one wall of said outlet chamber, a first outlet passage from said outlet chamber adapted to be connected to said carburetor, a second outlet passage from said outlet chamber adapted to be connected to said fuel tank, adjustable pressure-responsive valve means in said second outlet passage which permits fuel to enter said second passage when the pressure in said outlet chamber
  • a fuel pump as claimed in claim 1 in which said diaphragm separates said outlet chamber from a closed chamber containing a compressible gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Reciprocating Pumps (AREA)
US787775A 1968-01-03 1968-12-30 Electromagnetically actuated fuel pump Expired - Lifetime US3556684A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR134650 1968-01-03

Publications (1)

Publication Number Publication Date
US3556684A true US3556684A (en) 1971-01-19

Family

ID=8644058

Family Applications (1)

Application Number Title Priority Date Filing Date
US787775A Expired - Lifetime US3556684A (en) 1968-01-03 1968-12-30 Electromagnetically actuated fuel pump

Country Status (7)

Country Link
US (1) US3556684A (it)
JP (1) JPS4837281B1 (it)
DE (1) DE1900093C3 (it)
ES (1) ES362069A1 (it)
FR (1) FR1557857A (it)
GB (1) GB1233351A (it)
SE (1) SE348525B (it)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804558A (en) * 1971-04-30 1974-04-16 Nippon Denso Co Electromagnetic pump
US3849031A (en) * 1973-05-04 1974-11-19 Walbro Corp Electronically controlled liquid fuel pump
US3877841A (en) * 1973-10-31 1975-04-15 Tadashi Nakamura Electromagnetic plunger pump
US3936242A (en) * 1973-10-30 1976-02-03 The Black And Decker Manufacturing Company Linear motor cooling fan
US4150924A (en) * 1977-06-10 1979-04-24 Taisan Industrial Co., Ltd. Electromagnetic plunger pump
US4832583A (en) * 1986-05-27 1989-05-23 Facet Enterprises, Inc. Low pressure metering fluid pump
US4934907A (en) * 1987-09-07 1990-06-19 J. Eberspacher Method and apparatus for heating a fuel
US5073095A (en) * 1990-04-10 1991-12-17 Purolator Product Company Whisper quiet electromagnetic fluid pump
DE9114384U1 (de) * 1991-11-19 1992-03-05 Gotec S.A., Sion Schwingkolbenpumpe
US5630401A (en) * 1994-07-18 1997-05-20 Outboard Marine Corporation Combined fuel injection pump and nozzle
US20090129951A1 (en) * 2007-11-16 2009-05-21 Caterpillar Inc. Electrically powered hydraulic actuating system
US20120244022A1 (en) * 2011-03-25 2012-09-27 Aisin Aw Co., Ltd. Electromagnetic pump
CN103649536A (zh) * 2011-08-24 2014-03-19 爱信艾达株式会社 电磁泵
US20140369855A1 (en) * 2013-06-14 2014-12-18 Richard Nelson Dual displacement fluid level control pump
US11225953B2 (en) * 2016-08-23 2022-01-18 Robertus Martinus Van Opdorp Injection assembly, injection pump, and method for supply of additive to a fluid in a pipe
US11255318B2 (en) 2017-11-10 2022-02-22 Motor Components, Llc Electric control module solenoid pump
US20230096698A1 (en) * 2019-05-30 2023-03-30 Motor Components, Llc Fuel pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1133295B (it) * 1980-05-08 1986-07-09 Weber Spa Pompa di combustibile ad azionamento elettrico,atto ad essere impiegata in impianti di iniezione per motori a combustione interna ad accensione comandata

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804558A (en) * 1971-04-30 1974-04-16 Nippon Denso Co Electromagnetic pump
US3849031A (en) * 1973-05-04 1974-11-19 Walbro Corp Electronically controlled liquid fuel pump
US3936242A (en) * 1973-10-30 1976-02-03 The Black And Decker Manufacturing Company Linear motor cooling fan
US3877841A (en) * 1973-10-31 1975-04-15 Tadashi Nakamura Electromagnetic plunger pump
US4150924A (en) * 1977-06-10 1979-04-24 Taisan Industrial Co., Ltd. Electromagnetic plunger pump
US4832583A (en) * 1986-05-27 1989-05-23 Facet Enterprises, Inc. Low pressure metering fluid pump
US4934907A (en) * 1987-09-07 1990-06-19 J. Eberspacher Method and apparatus for heating a fuel
US5073095A (en) * 1990-04-10 1991-12-17 Purolator Product Company Whisper quiet electromagnetic fluid pump
DE9114384U1 (de) * 1991-11-19 1992-03-05 Gotec S.A., Sion Schwingkolbenpumpe
US5630401A (en) * 1994-07-18 1997-05-20 Outboard Marine Corporation Combined fuel injection pump and nozzle
US20090129951A1 (en) * 2007-11-16 2009-05-21 Caterpillar Inc. Electrically powered hydraulic actuating system
US20120244022A1 (en) * 2011-03-25 2012-09-27 Aisin Aw Co., Ltd. Electromagnetic pump
US9017044B2 (en) * 2011-03-25 2015-04-28 Aisin Aw Co., Ltd. Electromagnetic pump
CN103649536A (zh) * 2011-08-24 2014-03-19 爱信艾达株式会社 电磁泵
CN103649536B (zh) * 2011-08-24 2016-01-20 爱信艾达株式会社 电磁泵
US20140369855A1 (en) * 2013-06-14 2014-12-18 Richard Nelson Dual displacement fluid level control pump
US9777716B2 (en) * 2013-06-14 2017-10-03 Richard Nelson Dual displacement fluid level control pump
US11225953B2 (en) * 2016-08-23 2022-01-18 Robertus Martinus Van Opdorp Injection assembly, injection pump, and method for supply of additive to a fluid in a pipe
US11255318B2 (en) 2017-11-10 2022-02-22 Motor Components, Llc Electric control module solenoid pump
US20230096698A1 (en) * 2019-05-30 2023-03-30 Motor Components, Llc Fuel pump

Also Published As

Publication number Publication date
JPS4837281B1 (it) 1973-11-10
GB1233351A (it) 1971-05-26
DE1900093A1 (de) 1969-08-07
ES362069A1 (es) 1970-11-01
FR1557857A (it) 1969-02-21
DE1900093B2 (de) 1974-02-14
SE348525B (it) 1972-09-04
DE1900093C3 (de) 1974-09-12

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