US3635403A - Fuel injection device - Google Patents

Fuel injection device Download PDF

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Publication number
US3635403A
US3635403A US865456A US3635403DA US3635403A US 3635403 A US3635403 A US 3635403A US 865456 A US865456 A US 865456A US 3635403D A US3635403D A US 3635403DA US 3635403 A US3635403 A US 3635403A
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US
United States
Prior art keywords
guiding body
conduit
conduit means
nozzle opening
nozzle
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
US865456A
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English (en)
Inventor
Wilfried Hofken
Walter Eckstein
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.)
LOrange GmbH
Original Assignee
LOrange GmbH
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 LOrange GmbH filed Critical LOrange GmbH
Application granted granted Critical
Publication of US3635403A publication Critical patent/US3635403A/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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the present invention relates to a fuel injection device, especially for fuel pump equipped diesel engines, in which the pump comprises a plunger reciprocable in a guiding body and is structurally united with a fuel nozzle head while an injection valve is provided in the fuel conveying path of the nozzle head, the spring of the injection valve which biases the valve closing element in closing direction being arranged in a spring hous-
  • known fuel injection devices of the above-mentioned general type are respectively associated with a cylinder of the internal combustion engine and, in most instances, are connected to the respective cylinder head while the pump is controlled by the cam shaft of the internal combustion engine through the intervention of a rocker or the like.
  • FIG. 1 is a longitudinal section through a fuel injection device according to the present invention.
  • FIG. 2 represents a section taken along the line II-II of FIG. 1.
  • the fuel injection device which comprises a plunger displaceable in a guiding body and structurally united with a fuel nozzle head in the fuel conveying passage of which there is provided an injection valve the closing member of which is spring-biased in closing direction, is characterized primarily in that the spring housing is formed by a recess in the guiding body and that the nozzle head is firmly connected to one end face of the guiding body.
  • the spring housing is formed by a recess in the guiding body and that the nozzle head is firmly connected to one end face of the guiding body.
  • the spring housing may in a simple manner be formed by a blind bore the axis of which constitutes an extension of the axis of the plunger.
  • the plunger guiding means may be formed by a blind bore in the guiding body so that a conduit connection between the guiding means for the plunger or the cylinder chamber of the plunger with the spring housing is avoided and a proper working of the valve will be assured.
  • a venting passage is provided in the spring housing which passage communicates with the suction chamber of the pump.
  • the nozzle head may be connected to the guiding body in a simple manner by a capscrew or box nut.
  • a shank is provided in the spring housing while a valve spring in the form of a coil spring extends around said shank.
  • the free end face of the shank forms an abutment for the valve closing member so that a simple arrangement for limiting the movement of the valve closing member is obtained.
  • the injection device illustrated therein comprises a housing I having inserted therein a guiding body 2 with stepwise varying diameter.
  • This guiding body 2 protrudes beyond one end of the housing 1 and at the corresponding end face of the housing 1 is provided with a collar 3 engaging the said end face of housing 1.
  • the collar 3 is by means of a box nut 4 clamped against the adjacent end face of housing 1.
  • a plunger 6 is displaceably mounted in a guiding bore 5 provided in and arranged coaxially with regard to the guiding body 2.
  • the guiding bore 5 has one end portion, namely the one adjacent the box nut 4, slightly widened in diameter to provide a cylinder chamber 7.
  • the guiding body 2 is provided with two radial openings 8 offset with regard to each other by said radial openings 8 being surrounded by and communicating with an annular passage 9 provided on the inside of the housing 1.
  • At least one longitudinalbore 10 provided in the housing 1 leads into said annular passage 9 and communicates with a transverse bore 12 provided in an extension 11 of said housing.
  • the extension 11 serves for connecting the injection device to a fuel line and, if desired, for connecting the injection device, for instance, to a cylinder head.
  • a nozzle head 13 Connected to that end of the guiding body 2 which protrudes beyond the box nut 4 is a nozzle head 13 with a box nut 14 which is screwed onto the thread provided at the adjacent end of the guiding body 2 and thus clamps the nozzle head 13 firmly against the end face 15 of the guiding body 2.
  • a valve having its closing member formed by a valve needle 16 is provided in the nozzle head 13.
  • the conical end 17 of the valve needle 16 has in the nozzle head 13 associated therewith a corresponding conical valve seat 18.
  • the cylindrical part of the valve needle 16 is displaceably mounted in a longitudinal bore 19 of the nozzle head 13 while the valve needle 16 is provided with a shank 20 protruding beyond that end face of the nozzle head 13 which faces toward the guiding body 2.
  • Shank 20 which extends into a blind bore 21 of the guiding body 2 has a flange 22 arranged in spaced relationship to the free end face of the shank 20.
  • a further shank 23 Opposite the shank 20 and of the same diameter as the latter is a further shank 23 which by means of a head 24 is connected to the bottom of the blind bore 21 in any convenient manner.
  • a coil spring which forms a valve spring 25.
  • the outer diameter of spring 25 is only slightly less than the inner diameter of the blind bore 21 serving as spring housing. From the inner end of the blind bore 21 there extends a transverse passage 26 forming a venting passage.
  • That end 31 of the plunger 6 which faces away from the nozzle head 13 and forms a shank is connected to a coupling 32, 32a protruding from the housing 1.
  • This coupling serves for establishing a driving connection of the fuel injection device, for instance, with a rocker driven by the cam shaft of the motor.
  • the plunger 6 is spring-biased by a pressure spring 33 so as to be urged to its starting position shown in the drawing.
  • the spring housing 21 is provided directly in the guiding body 2 and inasmuch as the nozzle head 13 is designed as a single integral piece, there is practically only the connection between the parts 13, 2 which is subjected to the high pump or injection pressure. This connection can easily be kept tight -because only in the small bores 27, 28 there occurs the highinjection pressure.
  • a fuel injection device especially for fuel pump equipped diesel engines, which includes: housing means having first conduit means therein for connection with a source of fuel, a guiding body arranged within said housing means and provided with second conduit means for connection with said first conduit means, said second conduit means leading to one end face of said guiding body, control plunger means reciprocable in said guiding body and operable to control communication between said first and second conduit means and to exert pressure on fuel in said second conduit means, said guiding body also having recess means at said one end face thereof, unitary nozzle head means connected to said guiding body directly against the end face thereof and provided with a nozzle opening and with third conduit means communicating with said second conduit means and leading to said nozzle opening, control valve means reciprocable in said unitary nozzle head means which is an integral piece from the high-pressure side of the pump to the end face and adapted for controlling fluid communication between said third conduit means and said nozzle opening, and spring.
  • control valve means within said recess means and normally causing said control valve means to close said nozzle opening to thereby interrupt fluid communication between said third conduit means and said noule opening, said control valve means being operable in response to a fluid pressure exceeding the thrust of said spring means to relieve said nozzle opening to thereby establish communication between said third conduit means and said nozzle opening.
  • a device in which the axis of said recess means is substantially an extension of the axis of said control lunger means. 4.
  • said guiding body comprises a blind bore having said control plunger means reciprocable therein and guiding the same.
  • a device in which said blind bore for said control plunger means ends in a chamber communicating with said second conduit means.
  • a device in which a box nut secures said nozzle head means to said guiding body, whereby thread means of said guiding body for said box nut are provided preferably directly adjoining the engagement end surface for said nozzle head means.
  • a fuel injection device especially for fuel pump equipped diesel engines, which includes: housing means having first conduit means therein for connection with a source of fuel, a guiding body arranged within said housing means and provided with second conduit means for connection with said first conduit means, said second conduit means leading to one end face of said guiding body, control plunger means reciprocable in said guiding body and operable to control communication between said first and second conduit means and to exert pressure on fuel in said second conduit means, said guiding body also having recess means at said one end face thereof, nozzle head means connected to said guiding body and provided with a nozzle opening and with third conduit means communicating with said second conduit means and leading to said nozzle opening, control valve means reciprocable in said nozzle head means for controlling fluid communication between said third conduit means and said nozzle opening, and spring means within said recess means and normally causing said control valve means to close said nozzle opening to thereby interrupt fluid communication between said third conduit means and said nozzle opening, said control valve means being operable in response to a fluid pressure exceeding the thrust of said spring means to relieve said
  • a device which includes nut means connecting said nozzle body means to said guiding body.
  • a device which includes abutment means arranged in said recess means for limiting the noule opening relieving stroke of said control valve means, said abutment means including a shank having said spring means in the form of a coil spring extending around said shank.
US865456A 1968-10-25 1969-10-10 Fuel injection device Expired - Lifetime US3635403A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1805024A DE1805024C2 (de) 1968-10-25 1968-10-25 Aus einer Baueinheit aus Einspritzpumpe und Einspritzventil bestehende Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3635403A true US3635403A (en) 1972-01-18

Family

ID=5711422

Family Applications (1)

Application Number Title Priority Date Filing Date
US865456A Expired - Lifetime US3635403A (en) 1968-10-25 1969-10-10 Fuel injection device

Country Status (5)

Country Link
US (1) US3635403A (es)
DE (1) DE1805024C2 (es)
FR (1) FR2021512A1 (es)
GB (1) GB1228327A (es)
SE (1) SE353579B (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565320A (en) * 1982-03-15 1986-01-21 Yanmar Diesel Engine Co. Ltd. Unit injector of internal combustion engine
US4627570A (en) * 1983-02-17 1986-12-09 Steyr-Daimler-Puch Ag Fuel injection unit for each cylinder of a diesel engine
US4650116A (en) * 1983-08-31 1987-03-17 L'orange Gmbh Fuel-injection device
US5333786A (en) * 1993-06-03 1994-08-02 Cummins Engine Company, Inc. Fuel injection device for an internal combustion engine
US20070186543A1 (en) * 2004-10-13 2007-08-16 Leo Bakaj Arrangement for the dosed injection of a reducing medium into the exhaust tract of an internal combustion engine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258167B (de) * 1963-01-22 1968-01-04 Aeroquip Ag Schnalle
AT353558B (de) * 1976-10-04 1979-04-15 Friedmann & Maier Ag Brennstoffeinspritzvorrichtung fuer einspritz- brennkraftmaschinen
AT362201B (de) * 1978-03-29 1981-04-27 Friedmann & Maier Ag Brennstoffeinspritzvorrichtung fuer einspritz- brennkraftmaschinen
DE3029497A1 (de) * 1979-10-11 1981-04-23 Lucas Industries Ltd., Birmingham, West Midlands Brennstoffpumpe
DE3813320A1 (de) * 1988-04-08 1989-10-19 Voest Alpine Automotive Pumpenduese fuer dieselmotoren

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346188A (en) * 1965-06-24 1967-10-10 Diesel Service Co Calibration stop for fuel injectors and the like
US3379374A (en) * 1966-08-22 1968-04-23 Gen Motors Corp Fuel injection device
US3450351A (en) * 1965-10-29 1969-06-17 Bosch Gmbh Robert Fuel injection nozzle for internal combustion engines

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697091C (de) * 1933-05-05 1940-10-05 Gen Motors Corp Brennstoff-Einspritzpumpe
US2285730A (en) * 1940-12-16 1942-06-09 Jr Charles A Lindeman Fuel injection pump
DE761799C (de) * 1942-02-19 1954-03-01 Sulzer Ag Brennstoffeinspritzpumpe fuer Brennkraftmaschinen
US2437529A (en) * 1943-06-23 1948-03-09 Northwest Eng Co Fuel injector
GB582783A (en) * 1944-07-12 1946-11-27 George Stephen Kammer Improvements in pilot fuel injectors for internal combustion engines
CH299030A (de) * 1950-12-08 1954-05-31 Daimler Benz Ag Brennstoffeinspritzvorrichtung mit zu einer Einheit vereinigten Einspritzpumpe und Einspritzdüse.
DE1892860U (de) * 1962-03-02 1964-05-14 Orange G M B H L Kolbenbuchse fuer brennstoffeinspritzpumpen.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346188A (en) * 1965-06-24 1967-10-10 Diesel Service Co Calibration stop for fuel injectors and the like
US3450351A (en) * 1965-10-29 1969-06-17 Bosch Gmbh Robert Fuel injection nozzle for internal combustion engines
US3379374A (en) * 1966-08-22 1968-04-23 Gen Motors Corp Fuel injection device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565320A (en) * 1982-03-15 1986-01-21 Yanmar Diesel Engine Co. Ltd. Unit injector of internal combustion engine
US4627570A (en) * 1983-02-17 1986-12-09 Steyr-Daimler-Puch Ag Fuel injection unit for each cylinder of a diesel engine
US4650116A (en) * 1983-08-31 1987-03-17 L'orange Gmbh Fuel-injection device
US5333786A (en) * 1993-06-03 1994-08-02 Cummins Engine Company, Inc. Fuel injection device for an internal combustion engine
US20070186543A1 (en) * 2004-10-13 2007-08-16 Leo Bakaj Arrangement for the dosed injection of a reducing medium into the exhaust tract of an internal combustion engine
US7866144B2 (en) * 2004-10-13 2011-01-11 L'orange Gmbh Arrangement for the dosed injection of a reducing medium into the exhaust tract of an internal combustion engine

Also Published As

Publication number Publication date
SE353579B (es) 1973-02-05
GB1228327A (es) 1971-04-15
FR2021512A1 (es) 1970-07-24
DE1805024C2 (de) 1983-06-01
DE1805024A1 (de) 1970-05-21

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