US3690566A - Fuel injection valve - Google Patents

Fuel injection valve Download PDF

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Publication number
US3690566A
US3690566A US177551A US3690566DA US3690566A US 3690566 A US3690566 A US 3690566A US 177551 A US177551 A US 177551A US 3690566D A US3690566D A US 3690566DA US 3690566 A US3690566 A US 3690566A
Authority
US
United States
Prior art keywords
spring
valve
seat
movable
valve member
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
US177551A
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English (en)
Inventor
Rudolf Krauss
Eugen Walch
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3690566A publication Critical patent/US3690566A/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow

Definitions

  • the movable valve member of such a fuel injection valve has to be centered at least prior to the beginning of each injection step.
  • a known fuel injection valve of the aforeoutlined type such as disclosed in German Patent No. 968,172
  • a movable valve member which has a spherical work face drawn against a conforming spherical valve seat by means of the closing spring.
  • the center of its spherical work face coincides with the center of the spherical valve seat.
  • the length of the movable valve member between the valve seat and the valve seat disc suspension is smaller than the length of the closing spring between its points of engagement.
  • FIG. 1 is an axial longitudinal section of a fuel injection valve incorporating the preferred embodiment and .
  • FIG. 2 is an axial sectional view on an enlarged scale of those components of the fuel injection valve shown in FIG. 1 which constitute the preferred embodiment.
  • a cup-shaped nozzle body 2 in which there is provided a nozzle opening 3 surrounded by a valve seat 3'.
  • a closing spring 5 engages a circular flange 2' of the nozzle body 2 with the interposition of a setting disc 4 (FIG. 2).
  • the other frontal terminal face of the closing spring 5 is in engagement with a spring seat disc 6.
  • the latter has a spherically formed middle portion 7 in which there is provided an opening 7 traversed by a movable valve member 8.
  • the latter includes an enlargement 9 provided with a spherical portion 9 which is in engagement with the concave side of the spherical portion 7.
  • the movable valve member 8 has at its terminus adjacent the nozzle body 2, a hemispherical valve head 10, which, together with the valve seat 3' constitutes the valve proper. It is noted that the valve seat 3' is spaced from the plane of engagement A of the springs in an upstream direction and the distance between plane A and seat 3' is at least R which is the radius of head 10. As clearly seen in FIG. 2, the length of the movable valve member 8 is substantially shorter than the length of the spring 5 when the member 8 is seated.
  • the bias of the spring is increased.
  • This augmented bias has a centering efiect on the misaligned movable valve member 8. It may be further observed that the plane of engagement B between the frontal terminal face of the spring 5 and the spring seat disc 6 contains the center C of the spherical portion 9' of enlargement 9. By virtue of this feature, the movable valve member 8 remains centered even if the spring seat disc 6 assumes an oblique position.
  • the fuel delivered by a fuel injection pump (not shown) is admitted in the nozzle holder 1 through a bore 11 and a filter 12 into a pressure chamber 13 which is bounded in the direction of injection by the nozzle body 2.
  • the fuel injection valve opens, that is, the movable valve member 8 is lifted off its valve seat 3' against the force of the spring 5 in the direction of injection,
  • a fuel injection valve of the type including channel means for admitting fuel under pressure and valved nozzle means to inject said fuel,'the improvement comp g A. a movable valve member having 1. a valve head at one end, 2. a securing means at the other end,
  • flange means for engaging said second frontal terminal face of said spring, said spring urging said valve head towards said valve seat, the distance between said first and second frontal terminal faces of said spring being greater than the length of said movable valve member measured between said valve seat and said securing means of the spring seat disc when said valve head is seated in said valve seat.
  • securing means of the movable valve member is formed of an enlargement having a spherical portion in I engagement with a complemental spherical portion of said securing means forming part of said spring seat disc.
  • valve seat has a spherical configuration.
  • valve seat is at a distance from said first frontal terminal face of said spring in an upstream direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US177551A 1970-09-28 1971-09-03 Fuel injection valve Expired - Lifetime US3690566A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2047588A DE2047588C2 (de) 1970-09-28 1970-09-28 Kraftstoffeinspritzventil für Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3690566A true US3690566A (en) 1972-09-12

Family

ID=5783563

Family Applications (1)

Application Number Title Priority Date Filing Date
US177551A Expired - Lifetime US3690566A (en) 1970-09-28 1971-09-03 Fuel injection valve

Country Status (12)

Country Link
US (1) US3690566A (enExample)
AT (1) AT309907B (enExample)
CS (1) CS150522B2 (enExample)
DE (1) DE2047588C2 (enExample)
ES (1) ES198134Y (enExample)
FR (1) FR2108514A5 (enExample)
GB (1) GB1365725A (enExample)
IT (1) IT938844B (enExample)
NL (1) NL163307C (enExample)
PL (1) PL81724B1 (enExample)
SE (1) SE362285B (enExample)
SU (1) SU441719A3 (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033507A (en) * 1975-01-15 1977-07-05 Robert Bosch Gmbh Fuel injection valve
US4356978A (en) * 1979-09-08 1982-11-02 Robert Bosch Gmbh Fuel injection valve and a method for manufacturing a fuel injection valve
US4361286A (en) * 1979-12-11 1982-11-30 Robert Bosch Gmbh Fuel injection nozzle for internal combustion engines
US4394971A (en) * 1981-03-04 1983-07-26 Lucas Industries Limited Fuel injection nozzle assembly
US20030173425A1 (en) * 2000-04-20 2003-09-18 Carlisle Hugh William Deposit control in fuel injector nozzles
US11827613B2 (en) 2019-08-01 2023-11-28 ExxonMobil Technology and Engineering Company Process and system to make olefin epoxides

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874000A (en) * 1957-03-13 1959-02-17 Bosch Arma Corp Fuel injection nozzles
US3444886A (en) * 1966-05-16 1969-05-20 Caterpillar Tractor Co Fuel injection valve
US3528613A (en) * 1968-01-15 1970-09-15 Hailwood & Ackroyd Ltd Fuel injector for internal combustion engines

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1810544A1 (de) * 1968-11-23 1970-06-11 Bosch Gmbh Robert Kraftstoffeinspritzventil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874000A (en) * 1957-03-13 1959-02-17 Bosch Arma Corp Fuel injection nozzles
US3444886A (en) * 1966-05-16 1969-05-20 Caterpillar Tractor Co Fuel injection valve
US3528613A (en) * 1968-01-15 1970-09-15 Hailwood & Ackroyd Ltd Fuel injector for internal combustion engines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033507A (en) * 1975-01-15 1977-07-05 Robert Bosch Gmbh Fuel injection valve
US4356978A (en) * 1979-09-08 1982-11-02 Robert Bosch Gmbh Fuel injection valve and a method for manufacturing a fuel injection valve
US4361286A (en) * 1979-12-11 1982-11-30 Robert Bosch Gmbh Fuel injection nozzle for internal combustion engines
US4394971A (en) * 1981-03-04 1983-07-26 Lucas Industries Limited Fuel injection nozzle assembly
US20030173425A1 (en) * 2000-04-20 2003-09-18 Carlisle Hugh William Deposit control in fuel injector nozzles
US6955307B2 (en) * 2000-04-20 2005-10-18 Orbital Engine Company (Australia) Pty Limited Deposit control in fuel injector nozzles
US11827613B2 (en) 2019-08-01 2023-11-28 ExxonMobil Technology and Engineering Company Process and system to make olefin epoxides

Also Published As

Publication number Publication date
AT309907B (de) 1973-09-10
ES198134U (es) 1975-05-16
PL81724B1 (enExample) 1975-08-30
ES198134Y (es) 1975-10-16
IT938844B (it) 1973-02-10
GB1365725A (en) 1974-09-04
NL163307B (nl) 1980-03-17
SE362285B (enExample) 1973-12-03
DE2047588A1 (de) 1972-03-30
NL163307C (nl) 1980-08-15
DE2047588C2 (de) 1982-10-21
CS150522B2 (enExample) 1973-09-04
FR2108514A5 (enExample) 1972-05-19
SU441719A3 (ru) 1974-08-30
NL7113253A (enExample) 1972-03-30

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