US2449382A - Fuel injection device - Google Patents

Fuel injection device Download PDF

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Publication number
US2449382A
US2449382A US700767A US70076746A US2449382A US 2449382 A US2449382 A US 2449382A US 700767 A US700767 A US 700767A US 70076746 A US70076746 A US 70076746A US 2449382 A US2449382 A US 2449382A
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US
United States
Prior art keywords
piston
valve
chamber
fuel
conduit
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
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US700767A
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English (en)
Inventor
Huber Robert
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D'ETUDES ET DE PARTICIPATIONS Ste
PARTICIPATIONS SOC ET
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PARTICIPATIONS SOC ET
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Publication date
Application filed by PARTICIPATIONS SOC ET filed Critical PARTICIPATIONS SOC ET
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Publication of US2449382A publication Critical patent/US2449382A/en
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    • 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
    • F02M59/022—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 having an accumulator storing pressurised fuel during pumping stroke of the piston for subsequent delivery to the injector
    • 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
    • F02M59/18—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps characterised by the pumping action being achieved through release of pre-compressed springs
    • 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
    • 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
    • F02M2700/137—Fuel pump with control of fuel outlet of pumping chamber to delivery pipe

Definitions

  • the present invention relates to fuel injection ⁇ device oi this type which is better adapted to meet the requirements of practice than those used for the same purpose up to the present time.
  • Fig. l is an axial sectional view of a fuel in jection device made according to a first embodiment of my invention
  • Fig. 2 is a similar view oia device of the same kind made according to another embodiment
  • the injection pump may be of any suitable construction.
  • it includes a piston I adapted to be rotated about its axis for adjustment of the amount of fuel fed on every stroke, this piston being provided with a cam-like surface 2v serving to determine, according to the angular position of piston I about its axis, either ,the end (Fig. 1) or the beginning (Fig. 2) of the fuel delivery by opening or closing, respecutively, the communication between the inside of the pump cylinder 3 and the inlet port I of this cylinder.
  • t" lMeans are provided for forming, for instance immediately above cylinder head 5, an accumulator chamber 6 adapted to coact with an accumulator piston 'I movable inside a sleeve 8 in line with accumulator chamber 6.
  • This piston 1 is subjected to the action of a suitable force. for instance that exerted by a spring 1a which urges said piston toward the inside of chamber 6 so as to tend to reduce the volume thereof.
  • I may fit the latter with a safety valve such as Id which opens, against the action of a spring il, when the pressure in chamber E exceeds a predetermined value.
  • the means for controlling the communication between accun'iulator ⁇ chamber t and conduit I2, which leads to the fuel injector, include a valve which, according to my invention, is operative in response to movements of piston I, so ,as to open, in particular, when this piston is close to the end of its inwardstroke.
  • I may either cause piston i.v
  • Fig. l shows an example of the iirst of these embodiments.
  • the communication controlling valve in question shown at I3 and subjected to the action of a spring 93a that urges it toward its closed position, has a stem provided with a groove lli located opposite the inlet of a passage I in communication with conduit I2.
  • This stem of valve i3 extends downwardly so as to project into cylinder 3.
  • piston I at theend of its inward stroke, comes into contact with the end of said valve stem and pushes it so as to lift valve i3 from its seat.
  • Accumulator chamber 6 is then brought into communication with conduit I2 through groove I4 and passage I5. A portion of the fuel present in chamber 6 and subjected to the pressure of accumulator piston l is injected into the engine cylinder by the injector fed through conduit I2.
  • valve I3 may be wholly independent of delivery valve 9, it is particularly advantageous to dispose valve 9 in an axial conduit I6 extending throughout valve I3.
  • valve I3 the stem of which is provided with a, groove Il'.
  • the end of-this valve stem projects into cylinder 3 and valve I3' is 2,44asea provided with an axial conduit IB'.
  • this last mentioned conduit is free from any closing means such as the delivery valve 9 of the preceding embodiment.
  • the lower end of the stem of valve I3' is bevelled so that the end face of piston I, when applied against this valve stem end, closes conduit I6' in a iiuidtight manner.
  • the end of the delivery stroke must not vary. It takes place when the groove I8 of piston I, which is constantly in communication with the inside of cylinder ⁇ 3 through passage I9, comes opposite inlet port 4, whereas, owing to the provision of cam-like surface 2, the beginning of the delivery is variable, since delivery begins only when the edge 2 of piston I completely closes inlet port l. Furthermore, the distance a between the end face of piston I and the lower end of the stem of valve I3' when the piston is at the end of its outward stroke, must be smaller than the distance b between the upper edge of groove I8 and the lower edge of port I4 for the same position of the piston.
  • valve I3 delivers fuel into accumulator chamber 6, this fuel being at a pressure corresponding to the strength of the spring 1a that acts on piston 1.
  • valve I3 remains closed. However. when the end face of piston I gets close to the end of the stem of said valve, the liquid present in the annular space c of cylinder 3, i. e. between the lower end of said valve stem and the inner cylindrical wall of said cylinder, is subjected. due to the throttling of the communication between said annular space and conduit I6', to a pressure higher than that existing in chamber 6. This pressure difference 'causes valve I3' to lift from its seat without any metallic contact having taken place between the end face of piston I and the end of the valve stem.
  • this spring is adapted to act upon an intermediate piece, for instance a piston 20 as shown in the embodiment of Fig. 1 or a cap 2I as shown in the embodiment of Fig. 2, this piece being in contact with the head 1 of accumulator piston 1, which is applied against said piece by the pressure existing in accumulator chamber 6.
  • this abutment is for instance constituted by the upper part 22 of the pump body.
  • it is constituted by an annular part 23 bearing on said pump body.
  • a conduit 21 is provided for evacuating air or fuel leaks. i
  • the fuel injection device according to my invention has thejadvantage of being particularly simple and of occupying the minimum volume.
  • a fuel injection device which comprises, in combination, means forming an accumulator chamber for fuel under pressure, a piston pump for feeding fuel to said chamber. a delivery conduit for leading fuel from said chamber to a fuel injector, a, valve adapted to control communication between said chamber and said conduit slidable in line with the pump piston and adapted to be pushed by it into opened position at the end of the inward stroke of said piston, and a check valve between said chamber and said pump.
  • a fuel injection device which comprises, in combination, means forming an accumulator chamber for fuel under pressure, a piston pump for-feeding fuel to said chamber, a delivery conduit for leading fuel from said chamber to a. fuel injector, a valve adapted to control communica tion between said chamber and said conduit slidable in line with the pump piston and adapted to b e pushed by it into opened position at the end of the inward stroke of said piston, and a check valve between said chamber and said pump mounted' coaxially inside said communication controlling valve.
  • a fuel injection device which comprises. in combination, means forming an accumulator chamber for fuel under pressure, avpump for feeding fuel to said chamber including a cylinder and a piston movable in said cylinder, means forming a passage coaxial with and of smaller diameter than said cylinder extending between said cylinder and said chamber, a delivery conduit for leading fuel from said chamber to a fuel injector, and a valve adapted to control communication between said chamber and said conduit including a tubular stem slidable in said passage and extending into said cylinder, the end of said stem located in said cylinder having a beveled edge. said valve stem being so dimensioned as to come into contact withsaid piston at'the end ofthe inward stroke thereof,
  • a fuel injectiondevice which comprisesfin combination, means forming an accumulator'4 chamber, an accumulator piston slidablevv in af portion of said chamber, elastic means for urging for intermittently connecting said chamber vvith 10 421,843

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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)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
US700767A 1945-10-22 1946-10-02 Fuel injection device Expired - Lifetime US2449382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2449382X 1945-10-22

Publications (1)

Publication Number Publication Date
US2449382A true US2449382A (en) 1948-09-14

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ID=9685463

Family Applications (1)

Application Number Title Priority Date Filing Date
US700767A Expired - Lifetime US2449382A (en) 1945-10-22 1946-10-02 Fuel injection device

Country Status (5)

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US (1) US2449382A (da)
CH (1) CH258409A (da)
DE (1) DE802967C (da)
DK (1) DK70474C (da)
GB (1) GB628132A (da)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2720842A (en) * 1949-06-07 1955-10-18 Lucas Ltd Joseph Pumps
US3155042A (en) * 1959-08-17 1964-11-03 Waukesha Foundry Co Fluid controlled variable output pump
US3363574A (en) * 1965-07-12 1968-01-16 Bosch Gmbh Robert Fuel injection pump
US3386423A (en) * 1965-12-14 1968-06-04 Participations Soc Et Fuel injection systems of the accumulation type for free piston autogenerators
US3456629A (en) * 1966-08-01 1969-07-22 Peugeot Fuel injection devices for compression ignited internal combustion engines

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754813A (en) * 1951-02-26 1956-07-17 William Doxford And Sons Ltd Fuel injection systems for internal combustion engines
DE946933C (de) * 1953-05-30 1956-08-09 Ewald Becker Dipl Ing Einrichtung zur Druckzerstaeubung von Kraftstoff im Ansaugkanal von Verbrennungsmotoren
DE936123C (de) * 1953-11-18 1955-12-22 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer Brennkraftmaschinen
DE1076997B (de) * 1957-04-17 1960-03-03 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer mehrzylindrige Brennkraftmaschinen
CH672168A5 (da) * 1987-01-30 1989-10-31 Nova Werke Ag

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2414261A (en) * 1943-07-23 1947-01-14 United Aircraft Corp Accumulator pump
US2414267A (en) * 1944-01-28 1947-01-14 United Aircraft Corp Injection system
US2420431A (en) * 1944-01-28 1947-05-13 United Aircraft Corp Injection timing
US2421843A (en) * 1943-07-23 1947-06-10 United Aireraft Corp Accumulator fuel injection system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2414261A (en) * 1943-07-23 1947-01-14 United Aircraft Corp Accumulator pump
US2421843A (en) * 1943-07-23 1947-06-10 United Aireraft Corp Accumulator fuel injection system
US2414267A (en) * 1944-01-28 1947-01-14 United Aircraft Corp Injection system
US2420431A (en) * 1944-01-28 1947-05-13 United Aircraft Corp Injection timing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2720842A (en) * 1949-06-07 1955-10-18 Lucas Ltd Joseph Pumps
US3155042A (en) * 1959-08-17 1964-11-03 Waukesha Foundry Co Fluid controlled variable output pump
US3363574A (en) * 1965-07-12 1968-01-16 Bosch Gmbh Robert Fuel injection pump
US3386423A (en) * 1965-12-14 1968-06-04 Participations Soc Et Fuel injection systems of the accumulation type for free piston autogenerators
US3456629A (en) * 1966-08-01 1969-07-22 Peugeot Fuel injection devices for compression ignited internal combustion engines

Also Published As

Publication number Publication date
DE802967C (de) 1951-02-26
GB628132A (en) 1949-08-23
DK70474C (da) 1950-01-09
CH258409A (fr) 1948-11-30

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