US3855982A - Injector - Google Patents

Injector Download PDF

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Publication number
US3855982A
US3855982A US00356185A US35618573A US3855982A US 3855982 A US3855982 A US 3855982A US 00356185 A US00356185 A US 00356185A US 35618573 A US35618573 A US 35618573A US 3855982 A US3855982 A US 3855982A
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US
United States
Prior art keywords
fuel
chambers
pistons
displacing
stop means
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
US00356185A
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English (en)
Inventor
W Brinkman
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TUBANTOR BV
Original Assignee
Holec NV
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Publication date
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Publication of US3855982A publication Critical patent/US3855982A/en
Assigned to TUBANTOR B.V. reassignment TUBANTOR B.V. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HOLEC N.V. A CORP. OF THE NETHERLANDS
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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/129—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers
    • F04B9/137—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers the pumping members not being mechanically connected to each other
    • F04B9/1372—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each pump piston in the two directions is obtained by a double-acting piston fluid motor
    • 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
    • F02M59/10—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 characterised by the piston-drive
    • F02M59/107—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 characterised by the piston-drive pneumatic drive, e.g. crankcase pressure drive
    • 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
    • F02M59/30—Varying fuel delivery in quantity or timing with variable-length-stroke pistons
    • 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
    • F04B5/00—Machines or pumps with differential-surface pistons
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
    • F04B9/125—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting elastic-fluid motor
    • 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
    • F02M2700/1341—Fuel pump driven by the differential pressure of a gas
    • 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
    • F02M2700/1376—Fuel pump with control of the pump piston stroke

Definitions

  • the invention relates to an injector for delivering fuel to at least two fuel inlets of a combustion engine with at least two combustion cylinders, comprising at least two pump chambers, each of said pump chambers communicating via an inlet valve with a fuel supply and via an exhaust valve with a fuel discharge to be connected to a fuel inlet of the combustion engine and each of said pump chambers being adjoined by a displacing member being displaceable to and fro over a pump stroke between two stops, said pump stroke being adjustable by means of control means.
  • each displacing member is movable between a fixed stop and an adjustable stop, consisting of a screw being adjustable by control means on behalf of controlling the pump output.
  • Mounting said injector so that all pump chambers in each cycle deliver accurately equal fuel volumes, is very difficult.
  • the invention improves the injector for delivering fuel to at least two fuel inlets of a combustionengine with at least two combustion cylinders, comprisingat least two pump chambers, each of said pump chambers communicating via an inlet valve with a fuel supply and via an exhaust valve with a'fuel discharge to be connected to a fuel inlet of the combustion engine and each of said pump chambers being adjoined by a displacing body being displaceable to and fro over a pump stroke between two stops, said pump stroke being adjustable by means of control means in that each displacing member is displaceable to and fro between two common stops adjustable by means of control means.
  • FIG. 1 shows a perspective view of an injector connected to a conventional four-cylinder four-stroke combustion engine
  • FIG. 2 shows an axial section of a further developed injector connected to a four-cylinder four-strokecombustion engine
  • FIG. 3 and 4 each a side view of an injector of the type shown in FIG. 2, destinated for, but differently connected to a six-cylinder four-stroke combustion engme.
  • FIGS. 1, 2 and 3 which are provided with the same reference numbers have a same function.
  • the four-cylinder four-stroke combustion engine of FIG. 1 comprises a cylinder block 1 with the cylinders 20, 2b, 2c and 2d.
  • the ignition takes successively place in the cylinders 2a, 2c, 2d and 2b. just as in the conventional four-cylinder four-stroke combustion engine during each two revolutions.
  • the cylinder 2a is provided with the conventional parts such as ignition plug 4a, inlet valve 5a, exhaust valve 6a, piston 7a, driving rod 8a, crank 9a of a crank shaft 9 and with an air inlet branch 10a of an air inlet manifold 10.
  • a fuel pump 3a of an injector 3 is provided for the cylinder 20.
  • the other cylinders 21; 2d are provided with corresponding parts and fuel pumps 3b 3d respectively.
  • This'combustion engine further comprises a fuel tank 11 for receiving fuel, particularly petrol, and a main fuel pump 12 connected to the fuel tank 11, said pump 12 delivering fuel, e.g., under a pressure of l ato, to a fuel supply 13 of the injector 3.
  • the fuel pump 3d shown in FIG. 1 delivering fuel to a fuel inlet 14d of the cylinder 2d, comprises a displacing member 15d constituted by a plunger, which adjoins a pump chamber 16d and two motor chambers 17d and 18d.
  • the pump chamber 16d is connected to the fuel supply 13 via an inlet valve 24d which opens at an initial pressure of 0,6 ato against spring pressure of a spring 25d and is connected to a fuel exhaust 37d via an exhaust valve 27d which opens at an initial pressure of 1,5 ato against pressure of a spring 26d, said fuel exhaust 37d commuengages at each of the two sides of the pump chamber 16d a stop 36 resp. 22 which are common for all displacing members 15a, 15b, 15c and 15d.
  • the motor chambers 17d and 18d are provided with connections 34d resp. 23d, said motor chambers 17d and 18d being connected through said connections 34d resp. 23d and through a narrow conduit'35d resp. 30d to the combustion cylinder 2a resp. 2d.
  • Each of the two common stops 36 and-22 consists of a cam mounted swingable in bearings 33 and adjusted via an arm 46.
  • the cam 36 is adjusted by a piston 32 moving in a cylinder 31 under the influence of the pressure prevailing in the inlet mainfold 10, said presure operating against the pressure power of the pressure spring 41.
  • the quantity of air supplied into the combustion cylinders 2a 2d decreases, while than by reduction of the pump stroke adjusted by means of the cam 36, also the output of each pump 3a.
  • the common stop 22 is adjustable under the influence of a barometer 43 correcting the pump stroke for compensating the pressure variations in the air entering the inlet manifold and under the influence of an electromagnet 44, which is excited during starting operation of the combustion motor for enlarging the output of the injector 3.
  • the conduit 35d is cooledby means of the air sucked in by the motor via the inlet manifold 10 and the conduit 35d is narrow.
  • the four-cylinder four-stroke combustion engine of FIG. 2 comprises a cylinder block 1 with the cylinders 2a, 2b, 2c and 2d.
  • the ignition successively takes place in the cylinders 2a, 20, 2d and 2b just as in the conventional four-cylinder four-stroke combustion engine, during each two revolutions.
  • the pumps 3a 3d are positioned in series instead'of parallelly, while the displacing members a and 15b are combined to one displacing element 40):, as well as the displacing members 150 and 15d to a displacing element 40y.
  • These displacing elements 40x and 40y are positioned in line between two adjustable common stops 22 and 36 which are wedge shaped instead of cam shaped, but for the rest said stops are adjusted as in FIG. 1 by the same control means 32, 31, 41 and 43, 44.
  • the motor chambers 17a, 17b, 17c, 17d, 18a, 18b, 18c and 18d of the injector 3 are connected to the combustion engine in another way, viz. to cylinders 2d, 20, 2b, 2a, 2c, 2d, 2a and 2b respectively. It is to be remarked that the motor chambers 18a, 18b, 18c and 18d are constituted by chambers 17b, 17a, 17d resp. 170.
  • the common stops 22 and 36 By cyclic movement of the displacing elements 40x and 40y the common stops 22 and 36 by turn will be unloaded from force'in axial direction, resulting in that adjustment of said stops is possible with minimum power, so that the adjustment accuracy is improved.
  • the displacing elements 40.x and 40y are preferably positioned parallelly and closely to each other between the two adjustable common stops 22 and 36, as the movement of the displacing elements 40x and 40y can be divided more reg ularly over the motor cycle, than in case of alignment in series, as shown in FIG. 2.
  • the parallel position of the displacing elements 40x and 40y obtained in this way also has the advantage that the stops 22 and 36 during a period of the motor cycle are unloaded from axial force, resulting in less required adjustment power, with regard to the parallel position as shown in FIG. 1.
  • FIG. 3 shows an injector 3 of the type of FIG. 2, with the understanding that the injector of FIG. 3 is destinated for and connected to a six-cylinder four-stroke combustion engine with cylinders 2a, 2b, 2c, 2d, 2e and 2fwith the ignition sequence a, e, c,f, b, and d.
  • the fuel pumps 3a, 3d, 32, 3b, 3c and 3f are positioned in the mentioned sequence in one and the same line between adjustable stops 36 and 22, whereby the displacing members 15a and 15d are combined to a displacing element 40u, the displacing members l5e and 15b to a displacing element 40v and the displacing members and 15f to a displacing element 40w.
  • the motor chambers 18a, 18d, 18e, 18b, 18c and 18], constituting the motor chambers 17d, 17a, 17b, 17e, 17f and respectively as well, are connected to the combustion cylinders 20, 2f, 2e, 2b, 2a and 2d respectively.
  • the operation of the injector of FIG. 3 is as follows.
  • stop 36 fule pumps 3d, 3b, 3a, 3f, 3e and 3c and stop 22, wherebythe motor chambers 18d, 18b, 18a, 18f, l8e and are connected to combustion cylinders 2c, 2f, 2e, 2b, 2a and 2d resp.
  • the injection takes place in the middle of the inlet stroke of the combustion cylinder concerned.
  • the injector 3 ofthe type as shown in FIG. 2 can be so connected that the injection takes place at the end of the inlet stroke of the combustion cylinder concerned.
  • the above mentioned displacing members instead of by means of gas taken from a combustion cylinder of the combustion engine, can be driven in another way, e.g., via a cam axis driving pistons of fluid cylinders, which are each connected with one of the above mentioned motor chambers.
  • lnjector for delivering fuel to at least two fuel inlets of a combustion engine with at least two combustion cylinders, comprising at least two pump chambers, each of said pump chambers communicating via an inlet valve with a fuel supply and via an exhaust valve with a fuel discharge to be connected to a fuel inlet of the combustion engine and each of said pump chambers being adjoined by a displacing member being displaceable to and fro over a pump stroke between two stops, said pump stroke being adjustable by means of control means, each displacing member being displaceable to and fro between two common stops adjustable by means of control means.
  • a fuel injection system comprising, in combination:
  • a fuel pump assembly comprising at least two fuel chambers disposed with their axes in a common plane, means for supplying fuel under low pressure to each chamber and including a check valve associated with each chamber to prevent back flow of fuel, a first fuel outlet conduit connecting one of said nozzles to one of said chambers and a second fuel outlet conduit connecting the other of said nozzles to the other of said chambers and each conduit including a check-valve responsive to pressure greater than said low pressure for passing fuel to the associated nozzle, a piston reciprocable in each fuel chamber, and drive means for urging said pistons periodically first in one direction and then in the opposite direction sequentially to receive low pressure fuel and to discharge fuel under high'pressure to a respective nozzle; and first stop means for positively limiting the movements of said pistons in one direction and second stop means for positively limiting the movements of said pistons in the other direction, first control means connected with said first stop means for moving said first stop means selectively to allow increased strokes of said pistons under engine starting conditions, and second control means connected with said second stop means for moving said
  • a fuel injection system as defined in claim 10 wherein there are four injection nozzles, four fuel chambers all connected to said means for supplying fuel under low pressure and individually connected to said nozzles, four pistons, said fuel chambers having their axes disposed in said common plane, and said first and second stop means each being a unitary device whereby similarly to limit the positions of all of said pistons.
  • a cylinder block. assembly having a plurality of fuel I chambers therein, a'plurality of pistons reciprocable in said chambers and cooperatively arranged in pairs in which as one piston of each pair moves in one direction the other piston of each pair moves in the opposite direction whereby said one piston causes fuel to enter its associated fuel chamber while the other piston causes fuel to be ejected under high pressure from its associated chamber and vice versa for the reversals of said directions of movement,'drive means for. impositively urging said pairs of pistons backand forth in said directions; and
  • first stop means and second stop means for positively limiting the end points of the strokes of all of said pistons whereby similarly to define the amounts of fuel delivered thereby, and control means for selectively varying the positions of said first and second stop means correspondingly to vary said amounts of fuel delivered.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
US00356185A 1972-05-05 1973-05-01 Injector Expired - Lifetime US3855982A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL727206081A NL154302B (nl) 1972-05-05 1972-05-05 Injectie-inrichting voor het afgeven van benzine aan een verbrandingsmotor met benzine-injectie.

Publications (1)

Publication Number Publication Date
US3855982A true US3855982A (en) 1974-12-24

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ID=19815979

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US00356185A Expired - Lifetime US3855982A (en) 1972-05-05 1973-05-01 Injector

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US (1) US3855982A (enrdf_load_html_response)
JP (1) JPS5532901B2 (enrdf_load_html_response)
DE (1) DE2322729A1 (enrdf_load_html_response)
FR (1) FR2183775B1 (enrdf_load_html_response)
GB (1) GB1425949A (enrdf_load_html_response)
NL (1) NL154302B (enrdf_load_html_response)
SE (1) SE383553B (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3446273A1 (de) * 1983-12-30 1985-07-18 Cummins Engine Co., Inc., Columbus, Ind. Treibstoff-einspritzsystem mit verdraengereinrichtungen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1314561A (en) * 1919-09-02 wright
US2053543A (en) * 1932-01-18 1936-09-08 Continental Motors Corp Fuel pumping system for engines
US2720344A (en) * 1952-05-21 1955-10-11 S U Carburetter Co Ltd Liquid fuel metering distributors for internal combustion engines
US3604405A (en) * 1969-05-07 1971-09-14 William A Maher Fuel injectors
US3654908A (en) * 1968-07-30 1972-04-11 Dewty Technical Developments L Fuel injection systems

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS444251Y1 (enrdf_load_html_response) * 1965-06-09 1969-02-17

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1314561A (en) * 1919-09-02 wright
US2053543A (en) * 1932-01-18 1936-09-08 Continental Motors Corp Fuel pumping system for engines
US2720344A (en) * 1952-05-21 1955-10-11 S U Carburetter Co Ltd Liquid fuel metering distributors for internal combustion engines
US3654908A (en) * 1968-07-30 1972-04-11 Dewty Technical Developments L Fuel injection systems
US3604405A (en) * 1969-05-07 1971-09-14 William A Maher Fuel injectors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3446273A1 (de) * 1983-12-30 1985-07-18 Cummins Engine Co., Inc., Columbus, Ind. Treibstoff-einspritzsystem mit verdraengereinrichtungen
US4621605A (en) * 1983-12-30 1986-11-11 Cummins Engine Company, Inc. Positive displacement fuel injection system

Also Published As

Publication number Publication date
DE2322729A1 (de) 1973-11-15
FR2183775A1 (enrdf_load_html_response) 1973-12-21
SE383553B (sv) 1976-03-15
NL154302B (nl) 1977-08-15
JPS4961518A (enrdf_load_html_response) 1974-06-14
NL7206081A (enrdf_load_html_response) 1973-11-07
FR2183775B1 (enrdf_load_html_response) 1980-06-06
JPS5532901B2 (enrdf_load_html_response) 1980-08-27
GB1425949A (en) 1976-02-25

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Date Code Title Description
AS Assignment

Owner name: TUBANTOR B.V. BINNENHAVENSTRAAT 71, 7553 GH HENGEL

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HOLEC N.V. A CORP. OF THE NETHERLANDS;REEL/FRAME:004068/0251

Effective date: 19820726