US2254441A - Pump - Google Patents

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Publication number
US2254441A
US2254441A US289742A US28974239A US2254441A US 2254441 A US2254441 A US 2254441A US 289742 A US289742 A US 289742A US 28974239 A US28974239 A US 28974239A US 2254441 A US2254441 A US 2254441A
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US
United States
Prior art keywords
pump
piston
ring
chamber
pump 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
US289742A
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English (en)
Inventor
Muller Helmut
Pischinger Anton
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Application granted granted Critical
Publication of US2254441A publication Critical patent/US2254441A/en
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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
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • F02D1/12—Transmission of control impulse to pump control, e.g. with power drive or power assistance non-mechanical, e.g. hydraulic
    • 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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/005—Arrangements of fuel feed-pumps with respect to fuel injection apparatus
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • 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
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • 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
    • F02M2700/07—Nozzles and injectors with controllable fuel supply
    • 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
    • F02M2700/13—Special devices for making an explosive mixture; Fuel pumps
    • F02M2700/1317—Fuel pumpo for internal combustion engines

Definitions

  • This invention relates to pumps o! the kind comprising a positively driven piston guided in a cylinder and having an axially extendingbore, which receives a. spring loaded equalizing piston and therewith forms a pumpchamber.
  • This type o! pump is well suited for injecting fuel into the cyiinder of an internal combustion engine and may be constructed to give an intermittent injection. as described in our copending application Serial No. 1891768, filed February 10, 1938, issued July 9, 1940, as Patent No. &206.914;
  • a pump there is a ring-shaped space between the pump cylinder and the equalizing piston within which reciprocates the end of the positively driven piston.
  • this ring-shaped space is used. as a second pump chamber by providing controlledinlet and-outlet means therefor.
  • the equalizing piston mayhave an an- ⁇ nular collar coacting with a seat on the cylinder at the end of the ring-shaped chamber, to serve as a, delivery valve; or a spring capinterposed between the spring and the equalizing piston may i act as the delivery yvalve.
  • the fluid may be sucked through a port controlled by the positively' -driven piston.
  • the invention by means of the ring-shapedstroke space of the positively driven piston,'which is necessa-ily present in'this type of pump, has the advantage that an additional pump and its drive are dispensed 'with.
  • the ring-shaped stroke space is particularly suited for this purpose, because the outer and inner pistons, for their service as pistons of the injection pump, are already accurately ground and can thereore pump a second fluid without any change or further work.
  • the ringshaped 'strokespace of the injection pump is used as a feeder pump'for the fuel, that is, it
  • excess Iuel may also be' conducted through a throttle, the flow resistance through which produces the necessary pressure in the suction chamber of the injection pump, which pressure may also be used !or the reguiation of the quantity of fuel to be Injected.
  • the pressure is brought to work upon a spring loaded piston ora diaph'agm, which operates the reguieeder pump !or the iniection pump:
  • Fig. 2 is a vertical section' of 'jzf modified fo oi' pump
  • Fig. 3 is a diagram of a modified uel pumping system wherein the ring pump serves as a Ieeder .pump and also as a regulating pump;
  • Fig. 4 is, a diagram of a further modified system, wherein the ringpump supplies a iquid for cooling the i'uei injection valve, in this case .thefuel itself; and
  • Fig. 5 is a diagram o! 'still another modification wherein the ring pump acts as a lubrication pump.
  • the pump shown in Fig. 1 has a piston 2 fltting in ai cylinder i and driven positively in the usual manner by a, cam c; also an equalizing piston l loaded by a spring &and Operating in a 1011811-- tudinal bor'e o! the piston 2.
  • the pistons are shown in the lower .dead center position.'that is.
  • the piston 2 can be angularly rotated, by means not shown, to vary the position of ports 8 in relation to the inclined lower edge II of the equalizing piston 4, thus varying the portion .of the charge in chamber o which escapes through return conduit H and consequently the quantity oi' fuel .pumped through po'rts 9 and conduit
  • the angular position of piston 4 is fixed by a screw 40. the nd of which engages in a slot 4l in the periphery of a. collar 42 onpiston 4.
  • the ring-shaped stroke space u which in FigT 1 is used as a feeder pump, communicates, in the position ot the pistons shown, with a suction duct !6 connected with a supply conduit
  • the fuel compressed in the ring chamber l4 passesinto the chamber s housing the equalizing spring 3 and from there through a tube I !a into a filter IS.
  • the filter is connected by a pipe lsa with the suction duct 5 of the injection pump.
  • the individual pumps may be connected to a common filter s, the upper space'of whi'ch serves as an air chamber.
  • filter 22 may be inserted in the supply conduit through a -hole 24 in the middle oi' the spring plate l'la, which, as in Fig. 1, has a peripheral ring surface 'ground to the seat 46.
  • a small space !or the entrance o! the fuel there is, in the position shown, a small space !or the entrance o! the fuel.
  • the equalizing piston 4 is immediately carried along with it and the suction port 24 in the spring cap is immediately closed.
  • the quantity of fuel which has been taken into the pump space l4 is 'th'ereupon pumped through the delivery valve and the port 23 to a filter (not shown) corre- Since the injection pump and the ring pump of the same 'cylinder sponding to the filter Is, thence to the pump space of the ring pump. If the ring pump should fail for any reason, the drive of the machine will necessariy be interrupted,
  • the ring pump sucks fue] from the' can be used for pumping lubricating oil to the bearings 36 of the engine.
  • the pump chamber of the injection pump and the ring pump are naturally entirely independent oi each other.
  • the ring pump can be used for additional auxiliary purposes, such as for a control pump for the starting air-valves.
  • the embodiments shown in Figs. 1-4 can be combined in various ways.
  • the ring pump can pump exclusively a regulating fluid, or the, regulating fluid can serve 'at the same time as a cooling medium.
  • a pump comprising a cylinder; a piston fltting in said cylinder having an open ended axially extending bore; an inner piston fltting in said bore: said pistons iorming an inner pump chamber within said bore and, in conjunction with said cylinder, forming a second ring-shaped pump chamber; means tor positively reciprocating said first piston; means yieldingly pressing said inner ber within said bore and, in conjunction with said cylinder, formi'ng a second ring-shaped pump chamber; means tor positively -eciprocating said first piston; a spring pressing said inner piston into said bore; adelivery valve controlling said ring-shaped pump chamber. comprising a member movable with said inner piston against the action of said spring; inlet means for said ringshaped pump chamber; and' inlet and outlet means i'or said inner pump chamber.
  • A-pump comprising a cylinder; a piston fltting in said cylinder having an open ended axially extending bore; an inner piston fltting in said bore; said pistons forming an inner pump chamber within said bore and, in conjunction with said cylinder, forming a second ring-shaped pump chamber; means for positively reciprocating said first piston; a spring' pressing said inner piston into said bore; said cyinder having an annular chamber and said inner piston having an'annular shoulder coacting with saidseat to form a delivery valve for said ring-shaped pump chamber; inlet means for said ring-shaped pump chamber; and inlet and outlet means for said inner pumpchamber.
  • valve seat adiacent one 'end of said ring-shaped pump chamber against which said spring cap seats to form a delivery valve for said ring-shaped .pump chamber; inlet means for said 4 ring-shaped pump chamber; and inlet and outlet means for said inner pump chamber.
  • a pump compriing a cylinder: a piston fiti seat adjacent one e'nd of said ring-shaped pump V 4.
  • a pump comprising a cylinde'; 'a piston fltfor positively reciprocating said first piston;
  • a pump as described in claim 1 in combination with a liquid reservoir; a conduit connecting said reservoir with the inlet mea'nsof said ring-shaped pump chamber; and a conduit connecting the outlet means of 'said ring-shaped pump chamber with the inlet means of said inner pump chamber.
  • a pump as described in claim 1 in combination with a liquid reservoir; a conduit connecting said reservoir with the inlet means oi' said ring-shaped pump chamber; a conduit connecting the outiet means of said ring-shaped pump chamber with the inlet means of said inner pump chamber; and means for returning excess liquid from said last mentioned 'conduit to said reservoir.
  • a pumping device for an internal combustion engine, a cylinder; a piston fitting in said cylinder having an open ended axially extending bore; an inner piston fitting in said bore; said pistons forming an inner pumpchamber within said bore and; in conjunction with said cylinder, forming a' second ring-shaped pump chamber; means last mentioned conduit; and pressure responsive means interposed in said last mentioned conduit behind said throttle controlling' said reguiating v means.
  • a pumping device for an internal combustion engine a cylinder; a piston fitting in said g cylinder having an open ended axially extending bore; an inner piston fitting in said bore;
  • said pistons forming an inner pump chamber within said bore' and, in conjunction with said cylnder, forming a second ring-shaped pump chamber; means for positively reciprocating said first piston; means yieldingly pressing 'said inner piston into said bore; inlet and outlet means for each of said pump chambers; a fuel reservoir; a conduit connecting said reservoir with' the inlet means of said ring-shaped pump chamber; a fuel iniection valve; a conduit connecting the outlet means of said inner pump chamber with said fuel injection valve; conduit means connecting the outlet means of said ring-shaped pump chamber with the inlet means of said inner pump chamber; means for returning fuel from said conduit means to said reservoir; and a pressure limiting valve controlling the diversion-of fuel through said last means to said reservoir.
  • a cylinder a piston fitting in said cylinder having an open ended axiaiiy extending bore; an inner piston fitting in said bore:
  • said pistons forming an inner pump chamber within said bore and, in conjunction with said cylnder, forming a second ring-shaped pump chamber; means for positively reciprocating said first piston; means -yieldingly 'pressing said inner piston into said bore; inlet and outlet means for each of said pump chambers; a fuel reservoir means for conveying fuel 'from said reservoir to the inlet means of said ring-shaped pump chamber; means for conveying fuel f-rom the outlet means o'f said ring-shaped pump chamber to the

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US289742A 1938-09-03 1939-08-12 Pump Expired - Lifetime US2254441A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH156983D DE704898C (de) 1938-09-03 1938-09-03 Brennstoffeinspritzvorrichtung fuer Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US2254441A true US2254441A (en) 1941-09-02

Family

ID=7182508

Family Applications (1)

Application Number Title Priority Date Filing Date
US289742A Expired - Lifetime US2254441A (en) 1938-09-03 1939-08-12 Pump

Country Status (3)

Country Link
US (1) US2254441A (fr)
DE (1) DE704898C (fr)
FR (1) FR858635A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800117A (en) * 1951-04-17 1957-07-23 Clayton Manufacturing Co Feed water control means for steam generating systems
US2848951A (en) * 1954-03-02 1958-08-26 Bosch Arma Corp Fuel injection apparatus
US4165723A (en) * 1976-03-09 1979-08-28 Robert Bosch Gmbh Fuel injection pump for internal combustion engines
FR2682996A1 (fr) * 1991-10-29 1993-04-30 Bosch Gmbh Robert Pompe d'injection de carburant pour moteurs a combustion interne.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800117A (en) * 1951-04-17 1957-07-23 Clayton Manufacturing Co Feed water control means for steam generating systems
US2848951A (en) * 1954-03-02 1958-08-26 Bosch Arma Corp Fuel injection apparatus
US4165723A (en) * 1976-03-09 1979-08-28 Robert Bosch Gmbh Fuel injection pump for internal combustion engines
FR2682996A1 (fr) * 1991-10-29 1993-04-30 Bosch Gmbh Robert Pompe d'injection de carburant pour moteurs a combustion interne.

Also Published As

Publication number Publication date
FR858635A (fr) 1940-11-29
DE704898C (de) 1942-09-18

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