US3709639A - Discharge controlled reciprocating pumps - Google Patents

Discharge controlled reciprocating pumps Download PDF

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Publication number
US3709639A
US3709639A US00023426A US3709639DA US3709639A US 3709639 A US3709639 A US 3709639A US 00023426 A US00023426 A US 00023426A US 3709639D A US3709639D A US 3709639DA US 3709639 A US3709639 A US 3709639A
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United States
Prior art keywords
compression chamber
piston
fluid
discharge
valve
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
US00023426A
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English (en)
Inventor
T Suda
H Kobayashi
S Nagata
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.)
Denso Corp
Original Assignee
NipponDenso Co Ltd
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Filing date
Publication date
Application filed by NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
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Publication of US3709639A publication Critical patent/US3709639A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically

Definitions

  • the discharge controlled pump means comprises a Foreign Application y Data piston, a cylinder and an electromagnetic valve pro- May 19,1969 Japan ..44/3s637 vided in fluid inlet Passage communicamlg with a compresslon chamber formed between the piston and a cylinder.
  • the electromagnetic valve is normally 123/139 open to provide for supply of fluid into the compres- 22/504 sion chamber but is closed when the volume of the [51] Int. Cl.
  • F02m-39l00 compression chamber has been decreased in the up- [58] Field of Search ..4l7/505, 494, 493, 284; ward stroke of the piston to a value corresponding to 21 NORMALLY CLOSED BACK PRESSURE RELIEF VALVE desired discharge quantity of fluid, whereby the fluid is confined and metered in the compression chamber.
  • the present invention relates to a pump means comprising a piston, a cylinder and an electromagnetic valve, by which the fluid is electrically metered for the purpose of controlling the rate of discharge of the pump.
  • the present invention proposes to meter the fluid electrically.
  • the object of the invention is to easily control the discharge of the fluid from the pump, merely by opening or closing an electromagnetic valve in accordance with the desired rate of discharge.
  • reference numeral 1 designates a pump driving cam shaft and 2 designates a cam fixedly mounted on said cam shaft 1.
  • the cam 2 is in engagement with a pushing rod 3 which is biased by a return spring 3'.
  • Reference numeral 4 designates a piston having a fluid passage 5 formed therein which establishes the end of the fluid discharge operation of the piston.
  • the piston 4 is reciprocably disposed within a cylinder 6, with its lower end connected with the pushing rod 3 integrally therewith.
  • Reference numeral 7 designates a compression chamber in which metering and compression of fluid are effected.
  • Reference numeral 8 designates a throttle.
  • Reference numeral 10 designates an electromagnetic valve, 11 a return spring which causes a return movement of a valve rod 13, 12 a valve seat on which the valve rod 13 will be seated, in the energized state of the electromagnetic valve, to stop the flow of fluid, and 14 a fluid passage formed in the valve rod 13.
  • Reference numeral 15 designates a discharge valve which is set to discharge fluid at an optional discharge pressure.
  • Reference numeral 16 designates a fluid tank which is communicated with the throttle 8 through a conduit and with the electromagnetic valve 10 via a feed pump 17 through another conduit.
  • Reference numeral 18 designates a controller controlling the electromagnetic valve 11 by a signal from a timing pick up 19 which generates the signal in synchronism with the rotation of the driving cam shaft 1.
  • the device of the present invention constructed as described above operates in the following manner: Namely, when the cam shaft 1 is rotated in the direction of arrow a, the pushing rod 3 in engagement with the cam 2 is caused to move in the direction of arrow b, whereby the piston is moved upwardly to compress the fluid.
  • the electromagnetic valve 10, during this period, is held in the deenergized state and the valve rod 13 is held away from the valve seat 12 by the action of the return spring 11, so that the fluid is constantly supplied by the feed pump 17 from the fluid tank 16 as indicated by the arrow 0.
  • the fluid passing through the fluid passage 14 of the electromagnetic valve 10 enters the compression chamber 7 through an inlet passage 9 to fill the same and excessive fluid flows through the throttle 8 to a tank 16 as indicated by the arrow d.
  • the throttle 8 is completely closed by the side wall of the piston 4 and, thereafter, the fluid pressure in the compression chamber 7 is built up by the rising piston 4. While the fluid pressure in the compression chamber 7 is lower than the valve opening pressure of the discharge valve 15, the fluid in said chamber flows out through the electromagnetic valve 10 as indicated by arrow e and returns to the tank 16 by-passing the feed pump 17 through a pressure regulating valve arranged in the pump and set to open at a pressure less than that of the discharge valve 15.
  • the electromagnetic valve 10 When the volume of the compression chamber 7 is reduced to a value corresponding to a required quantity of fluid to be discharged upon further upward movement of the piston 4, the electromagnetic valve 10 is energized, by the controller 18 which receives a signal from the timing pick-up 19 with the result that the valve rod 13 snugly seats on the valve seat 12, stopping the flow of fluid, whereby the fluid is positively confined within the compression chamber 7 and metered thereby. As the piston 4 further rises, the fluid pressure overcome the valve opening pressure of the discharge valve 15 and the fluid thus metered is discharged through said discharge valve in the direction of arrow g.
  • the quantity of fluid to be discharged from a reciprocating pump is metered by providing the electromagnetic valve 10 in the fluid inlet passage 9 communicating with the compression chamber 7 formed between the piston 4 and the cylinder 6, said electromagnetic valve 10 being normally held in the open state to provide for constant supply of fluid into the compression chamber 7 but being closed when the volume of said compression chamber has been decreased, in the upward stroke of the piston 4, to a value corresponding to the desired discharge quantity of fluid, to confine and meter the fluid in said compression chamber. Therefore, with the device of the present invention, it is only necessary to maintain the electromagnetic valve in the open state or in the closed state according to the desired rate of discharge, as contrasted to the conventional discharge control devices wherein the end of the return stroke of the piston is defined mechanically. Consequently, the present invention has the excellent advantage that an electrical discharge controlled pump means of an extremely simple construction can be obtained.
  • a discharge-controlled pump means comprising:
  • a cylinder having a piston reciprocally received therein, and defining a compression chamber within said cylinder on one side of said piston;
  • reversible flow conduit means for forwarding fluid from the fluid supply to the compression chamber and for returning fluid from the compression chamber to the fluid supply;
  • adischarge valve in communication with said compression chamber, and arranged for discharging fluid from the compression chamber when the piston has reached the vicinity wherein the volume of the compression chamber is at least nearly its smallest;
  • controller interconnecting the normally open electromagnetic valve and the means for intermittently reciprocating the piston for controlling the electromagnetic valve in response to reciprotation of the piston, said controller being set to close the normally open electromagnetic valve only for a period of time beginning after the piston has begun to decrease the volume of the compression chamber but before the piston has reached the vicinity wherein the volume of the compression chamber is its smallest;
  • back pressure relief valve means interposed in said conduit means between said electromagnetic valve and said fluid supply, said back pressure relief valve means having a threshold pressure for opening which is lower than the threshold pressure for opening said discharge valve;
  • said compression chamber being so arranged that, upon reciprocation of said piston to decrease the volume of the compression chamber, the threshold pressure for opening the normally closed back pressure relief valve is reached before said normally open electromagnetic valve is closed by said controller; whereby a controlled amount of fluid is present m the compression chamber when the normally open electromagnetic valve is closed by said controller, so that a controlled amount of fluid may be expelled from the compression chamber through said discharge valve, upon further reciprocation of the piston in a sense to decrease the volume of the compression chamber.
  • the discharge controlled pump means of claim 1 further including further conduit means communicating between the compression chamber and the fluid supply for returning excess fluid from the compression chamber to the fluid supply during an initial portion of each reciprocation of the piston in a sense to decrease the volume of the compression chamber, the further conduit means being adapted for this task by being communicated to the compression chamber at a location disposed to be shut-off by the piston at the conclusion of said initial portion of each reciprocation of the pistonv 4.
  • the discharge controlled pump means of claim 3 wherein the communication of the further conduit means to the compression chamber is so located that said communication is shut-off by said piston before the threshold pressure for opening the back pressure relief valve has been reached.
  • the discharge controlled pump means of claim 3 further including fluid passage means in said piston disposed for communicating between the compression chamber and the further conduit means only during a terminal portion of each reciprocation of the piston, after the discharge valve has opened during each respective reciprocation.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
US00023426A 1969-05-19 1970-03-27 Discharge controlled reciprocating pumps Expired - Lifetime US3709639A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44038637A JPS506043B1 (enrdf_load_stackoverflow) 1969-05-19 1969-05-19

Publications (1)

Publication Number Publication Date
US3709639A true US3709639A (en) 1973-01-09

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ID=12530742

Family Applications (1)

Application Number Title Priority Date Filing Date
US00023426A Expired - Lifetime US3709639A (en) 1969-05-19 1970-03-27 Discharge controlled reciprocating pumps

Country Status (3)

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US (1) US3709639A (enrdf_load_stackoverflow)
JP (1) JPS506043B1 (enrdf_load_stackoverflow)
DE (1) DE2018112A1 (enrdf_load_stackoverflow)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851635A (en) * 1969-05-14 1974-12-03 F Murtin Electronically controlled fuel-supply system for compression-ignition engine
US3873241A (en) * 1972-07-10 1975-03-25 Komatsu Mfg Co Ltd Variable output gear pump and motor
FR2404118A1 (enrdf_load_stackoverflow) * 1977-09-21 1979-04-20 Daimler Benz Ag
US4378775A (en) * 1980-07-01 1983-04-05 Robert Bosch Gmbh Method and apparatus for fuel injection in internal combustion engines in particular diesel engines
EP0087215A1 (en) * 1982-02-19 1983-08-31 General Motors Corporation Pump injector unit with electromagnetic control of fuel passages
US4531672A (en) * 1983-05-13 1985-07-30 Cummins Engine Company, Inc. Solenoid operated unit injector having distinct timing, metering and injection periods
US4623118A (en) * 1982-08-05 1986-11-18 Deere & Company Proportional control valve
EP0207652A1 (en) * 1985-07-02 1987-01-07 General Motors Corporation Electromagnetic unit fuel injector
US4696160A (en) * 1985-05-14 1987-09-29 Trw Inc. Pressure pump and injector valve system for liquid-propellant engines
US4907949A (en) * 1986-12-16 1990-03-13 Regie Nationale Des Usines Renault Variable flow pump
US5158437A (en) * 1990-03-15 1992-10-27 Abbott Laboratories Volumetric pump with spring-biased cracking valves
US5201297A (en) * 1987-09-04 1993-04-13 Robert Bosch Gmbh Method and apparatus for controlling a high-pressure fuel pumping time in a fuel injection pump
WO1995025892A3 (en) * 1994-03-21 1995-10-19 Sapphire Eng Inc Electro-magnetically operated valve
US5540206A (en) * 1991-02-26 1996-07-30 Ficht Gmbh Fuel injection device for internal combustion engines
EP0840009A3 (de) * 1996-10-29 1999-12-01 Robert Bosch Gmbh Hochdruckpumpe
US6347614B1 (en) 1999-07-23 2002-02-19 Lawrence W. Evers Mechanical fuel injection system
US6394072B1 (en) * 1990-08-31 2002-05-28 Yamaha Hatsudoki Kabushiki Kaisha Fuel injection device for engine
US6447273B1 (en) * 1998-12-24 2002-09-10 Isuzu Motors Limited Variable-delivery high-pressure fuel pump
US6843641B1 (en) * 1999-12-08 2005-01-18 Robert Bosch Gmbh Radial piston pump
US20060222518A1 (en) * 2004-12-17 2006-10-05 Denso Corporation Solenoid valve, flow-metering valve, high-pressure fuel pump and fuel injection pump
US20120245826A1 (en) * 2011-03-23 2012-09-27 Hitachi, Ltd Method and apparatus to reduce engine noise in a direction injection engine
US20130213360A1 (en) * 2012-02-17 2013-08-22 Ford Global Technologies, Llc Fuel pump with quiet rotating suction valve
US20150211459A1 (en) * 2012-09-06 2015-07-30 Delphi International Operations Luxembourg, S.A.R.L. Pump unit and method of operating the same
JP2015212580A (ja) * 2014-05-06 2015-11-26 サルコス・エルシー ロボット装置のための高速調整液圧供給装置
US20160010607A1 (en) * 2013-03-05 2016-01-14 Stanadyne Corporation Electronically controlled inlet metered single piston fuel pump

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2503346C2 (de) * 1975-01-28 1986-04-03 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffverteilereinspritzpumpe für Brennkraftmaschinen
CA1182356A (en) * 1980-10-06 1985-02-12 Aladar O. Simko Electromagnetically controlled fuel injection pump
FR2504203B1 (fr) * 1981-04-16 1985-05-31 Semt Pompe d'injection pour moteur a combustion interne comprenant un dispositif de reglage de l'instant de refoulement du combustible d'injection
DE19947890B4 (de) * 1999-10-05 2005-10-27 Siemens Ag Verfahren zum Betreiben einer Pumpe in einer Kraftstoffeinspritzanlage
US9616580B2 (en) 2012-05-14 2017-04-11 Sarcos Lc End effector for a robotic arm

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2965037A (en) * 1956-11-20 1960-12-20 Bessiere Pierre Etienne Reciprocating action pumps and in particular in fuel injection pumps for internal combustion engines
US3240390A (en) * 1963-10-25 1966-03-15 John Wood Company Solenoid pilot valve
US3500803A (en) * 1969-02-19 1970-03-17 Gillett Tool Co Electronic modulator circuit for precision fuel metering systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2965037A (en) * 1956-11-20 1960-12-20 Bessiere Pierre Etienne Reciprocating action pumps and in particular in fuel injection pumps for internal combustion engines
US3240390A (en) * 1963-10-25 1966-03-15 John Wood Company Solenoid pilot valve
US3500803A (en) * 1969-02-19 1970-03-17 Gillett Tool Co Electronic modulator circuit for precision fuel metering systems

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851635A (en) * 1969-05-14 1974-12-03 F Murtin Electronically controlled fuel-supply system for compression-ignition engine
US3873241A (en) * 1972-07-10 1975-03-25 Komatsu Mfg Co Ltd Variable output gear pump and motor
FR2404118A1 (enrdf_load_stackoverflow) * 1977-09-21 1979-04-20 Daimler Benz Ag
US4378775A (en) * 1980-07-01 1983-04-05 Robert Bosch Gmbh Method and apparatus for fuel injection in internal combustion engines in particular diesel engines
EP0087215A1 (en) * 1982-02-19 1983-08-31 General Motors Corporation Pump injector unit with electromagnetic control of fuel passages
US4623118A (en) * 1982-08-05 1986-11-18 Deere & Company Proportional control valve
US4531672A (en) * 1983-05-13 1985-07-30 Cummins Engine Company, Inc. Solenoid operated unit injector having distinct timing, metering and injection periods
US4696160A (en) * 1985-05-14 1987-09-29 Trw Inc. Pressure pump and injector valve system for liquid-propellant engines
EP0207652A1 (en) * 1985-07-02 1987-01-07 General Motors Corporation Electromagnetic unit fuel injector
US4907949A (en) * 1986-12-16 1990-03-13 Regie Nationale Des Usines Renault Variable flow pump
US5201297A (en) * 1987-09-04 1993-04-13 Robert Bosch Gmbh Method and apparatus for controlling a high-pressure fuel pumping time in a fuel injection pump
US5158437A (en) * 1990-03-15 1992-10-27 Abbott Laboratories Volumetric pump with spring-biased cracking valves
US6394072B1 (en) * 1990-08-31 2002-05-28 Yamaha Hatsudoki Kabushiki Kaisha Fuel injection device for engine
US5540206A (en) * 1991-02-26 1996-07-30 Ficht Gmbh Fuel injection device for internal combustion engines
WO1995025892A3 (en) * 1994-03-21 1995-10-19 Sapphire Eng Inc Electro-magnetically operated valve
EP0840009A3 (de) * 1996-10-29 1999-12-01 Robert Bosch Gmbh Hochdruckpumpe
KR100514275B1 (ko) * 1996-10-29 2005-11-25 로베르트 보쉬 게엠베하 고압펌프
US6447273B1 (en) * 1998-12-24 2002-09-10 Isuzu Motors Limited Variable-delivery high-pressure fuel pump
US6347614B1 (en) 1999-07-23 2002-02-19 Lawrence W. Evers Mechanical fuel injection system
US6843641B1 (en) * 1999-12-08 2005-01-18 Robert Bosch Gmbh Radial piston pump
US20060222518A1 (en) * 2004-12-17 2006-10-05 Denso Corporation Solenoid valve, flow-metering valve, high-pressure fuel pump and fuel injection pump
US7819637B2 (en) * 2004-12-17 2010-10-26 Denso Corporation Solenoid valve, flow-metering valve, high-pressure fuel pump and fuel injection pump
US20120245826A1 (en) * 2011-03-23 2012-09-27 Hitachi, Ltd Method and apparatus to reduce engine noise in a direction injection engine
US9309849B2 (en) * 2011-03-23 2016-04-12 Hitachi, Ltd Method and apparatus for reducing the number of separately distinguishable noise peaks in a direct injection engine
US20130213360A1 (en) * 2012-02-17 2013-08-22 Ford Global Technologies, Llc Fuel pump with quiet rotating suction valve
US9989026B2 (en) * 2012-02-17 2018-06-05 Ford Global Technologies, Llc Fuel pump with quiet rotating suction valve
US20150211459A1 (en) * 2012-09-06 2015-07-30 Delphi International Operations Luxembourg, S.A.R.L. Pump unit and method of operating the same
US10451047B2 (en) * 2012-09-06 2019-10-22 Delphi Technologies Ip Limited Pump unit and method of operating the same
US20160010607A1 (en) * 2013-03-05 2016-01-14 Stanadyne Corporation Electronically controlled inlet metered single piston fuel pump
US10294906B2 (en) * 2013-03-05 2019-05-21 Stanadyne Llc Electronically controlled inlet metered single piston fuel pump
JP2015212580A (ja) * 2014-05-06 2015-11-26 サルコス・エルシー ロボット装置のための高速調整液圧供給装置

Also Published As

Publication number Publication date
JPS506043B1 (enrdf_load_stackoverflow) 1975-03-10
DE2018112A1 (enrdf_load_stackoverflow) 1970-12-03

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