US3887140A - Fuel injection arrangement - Google Patents

Fuel injection arrangement Download PDF

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Publication number
US3887140A
US3887140A US435171A US43517174A US3887140A US 3887140 A US3887140 A US 3887140A US 435171 A US435171 A US 435171A US 43517174 A US43517174 A US 43517174A US 3887140 A US3887140 A US 3887140A
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United States
Prior art keywords
fuel injection
screw nipple
nozzle holder
injection arrangement
hose
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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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US435171A
Inventor
Karl Hofmann
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of US3887140A publication Critical patent/US3887140A/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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings

Definitions

  • a fuel injection arrangement for internal combustion engines includes a nozzle holder and a hose coupling member.
  • the hose coupling member is a screw nipple screwed into the nozzle holder.
  • the screw nipple has at least one spout to which a hose may be connected.
  • a fuel injection nozzle This invention relates to a fuel injection. nozzle for 5 according to the present invention includes a partially internal combustion engines.
  • the invention relates. more particularly. to a fuel injection nozzle for internal combustion engines which has a hose coupling member serving for fuel supply and a nozzle holder. the coupling member being screwed into the nozzle holder.
  • hose coupling members of this kind usually consist of a hose nipple equipped with two sealing rings and fastened on the nozzle holder by a hollow screw. They are. therefore, a not unsubstantial part of the cost of the injection nozzle. which is usually manufactured in large numbers.
  • a fuel injection nozzle for internal combustion engines which includes. in combination, a nozzle holder and a hose coupling member screwed into the nozzle holder.
  • the coupling member being a screw nipple having at least one spout to which a hose may be connected.
  • the hose coupling member is developed as a screw nipple having at least one hose connecting spout.
  • a ra dial end face exists on the screw nipple between the threaded stud and the connecting head which has a larger diameter; this surface presses an elastic ring onto a corresponding sealing surface on the nozzle holder.
  • the screw nipple is equipped with two hose spouts. which form two arms aT with respect to one another.
  • This is especially advantageous for leak fuel connections. This is so because. on the leakage fuel side. in diesel injection. normally several nozzles are connected together by T-members in the leakage line. Aside from the fact that such T-mernbcrs represent additional possibilities for leakage. it is usually necessary to employ longer lines which may be a disadvantage in the engine compartment. because they constitute obstacles.
  • FIG. I is a partial. pictorial view of a fuel injection nozzle according to the present invention. a partial section of the longitudinal side having been taken to show the internal arrangement of its parts.
  • FIG. 2 is a view of the side of the fuel injection nozzle shown in FIG. I which faces away from the engine.
  • the screw nipple 2 is suitably made of a synthetic (plastic) material. 'As visible in FIG. 2, the screw nipple 2 is provided with two hose spouts 3.
  • the screw nipple 2 serves as a leakage fuel drainage and is connected through a channel 4 with a spring chamber (not shown).
  • the side of the screw nipple 2 facing away from the nozzle holder 1 is equipped with a slit 5 through which the screw nipple 2 can be rotated with the aid of a screwdriver.
  • a plane surface 8 is formed between a threaded stud portion 6 and a cross-sectionally larger head portion 7 of the screw nipple 2. This plane surface presses an elastic sealing ring 9, for example. a rubber ring, onto an annular surface 10 ot the nozzle holder 1.
  • the sealing ring 9 compensates for form changes of the nipple 2 which possibly may occur with the passage of time; for example. if the nipple 2 were made of plastic and dimensional changes occur in time due to creeping or settling. or because of temperature changes or aging.
  • a fuel injection arrangement for internal combustion engines comprising, in combination: a nozzle holder for holding a fuel injection nozzle. and a readily separable hose coupling member screwed into said nozzle holder.
  • said coupling member being a screw nipple having at least one hosereceiving spout to which a hose may be removably connected.
  • said screw nipple includes a threaded stud portion which is screwed into said nozzle holder and a head portion defining a radial end face at that end of said head portion facing said nozzle holder.
  • said nozzle holder having a sealing surface corresponding to said radial end face. and an elastic sealing ring positioned between said sealing surface and said end face.

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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)

Abstract

A fuel injection arrangement for internal combustion engines includes a nozzle holder and a hose coupling member. The hose coupling member is a screw nipple screwed into the nozzle holder. The screw nipple has at least one spout to which a hose may be connected.

Description

United States Patent 1 Hofmann 1 June 3,1975
[ FUEL INJECTION ARRANGEMENT [75] inventor: Karl l-lofmann, Aldingen, Germany [73] Assignee: Robert Bosch G.In.b.1-1., Stuttgart,
Germany [22] Filed: Jan. 21, 1974 [21] Appl. No.: 435,171
[30] Foreign Application Priority Data Feb. 17, 1973 Germany 2308001 [52] US. Cl. 239/600; 239/397; 239/580 [51] Int. Cl B05b l/00; B05b 15/06 [58] Field of Search 239/86, 170, 176, 271, 239/272, 397, 436, 542, 548, 550, 565, 580,
[56] References Cited UNITED STATES PATENTS 2,373,353 4/1945 Smith 239/548 Primary Examiner-Robert S. Ward, Jr. Attorney, Agent, or FirmEdwin E. Greigg [5 7 ABSTRACT A fuel injection arrangement for internal combustion engines includes a nozzle holder and a hose coupling member. The hose coupling member is a screw nipple screwed into the nozzle holder. The screw nipple has at least one spout to which a hose may be connected.
10 Claims, 2 Drawing Figures I FUEL INJECTION ARRANGEMENT BACKGROUND OF THE INVENTION As illustrated in FIGS. 1 and 2, a fuel injection nozzle This invention relates to a fuel injection. nozzle for 5 according to the present invention includes a partially internal combustion engines. The invention relates. more particularly. to a fuel injection nozzle for internal combustion engines which has a hose coupling member serving for fuel supply and a nozzle holder. the coupling member being screwed into the nozzle holder. Known hose coupling members of this kind usually consist of a hose nipple equipped with two sealing rings and fastened on the nozzle holder by a hollow screw. They are. therefore, a not unsubstantial part of the cost of the injection nozzle. which is usually manufactured in large numbers.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a fuel injection nozzle having a hose coupling member which can be manufactured advantageously from a cost standpoint.
It is another object of the present invention to provide a fuel injection nozzle which includes a hose cou pling member which is easily separable from the nozzle holder.
The foregoing objects. as well as others which are to become clear from the text below. are achieved in accordance with the present invention by providing a fuel injection nozzle for internal combustion engines which includes. in combination, a nozzle holder and a hose coupling member screwed into the nozzle holder. the coupling member being a screw nipple having at least one spout to which a hose may be connected.
It is a salient feature of the invention that the hose coupling member is developed as a screw nipple having at least one hose connecting spout.
In one preferred embodiment of the invention a ra dial end face exists on the screw nipple between the threaded stud and the connecting head which has a larger diameter; this surface presses an elastic ring onto a corresponding sealing surface on the nozzle holder. By means of the elastic ring. the screw nipple can be rotated to a desired position for the spout to which a hose is to be connected. Furthermore. changes in the measurements of the screw nipple. for example, by the influence of temperature. aging or the like. are effectively compensated by the elastic ring.
According to a supplementary embodiment of the invention. the screw nipple is equipped with two hose spouts. which form two arms aT with respect to one another. This is especially advantageous for leak fuel connections. This is so because. on the leakage fuel side. in diesel injection. normally several nozzles are connected together by T-members in the leakage line. Aside from the fact that such T-mernbcrs represent additional possibilities for leakage. it is usually necessary to employ longer lines which may be a disadvantage in the engine compartment. because they constitute obstacles.
BRIEF DESCRIPTION OF THE DRAWING FIG. I is a partial. pictorial view of a fuel injection nozzle according to the present invention. a partial section of the longitudinal side having been taken to show the internal arrangement of its parts.
FIG. 2 is a view of the side of the fuel injection nozzle shown in FIG. I which faces away from the engine.
illustrated nozzle holder I and a screw nipple 2. The screw nipple 2 is suitably made of a synthetic (plastic) material. 'As visible in FIG. 2, the screw nipple 2 is provided with two hose spouts 3. The screw nipple 2 serves as a leakage fuel drainage and is connected through a channel 4 with a spring chamber (not shown).
The side of the screw nipple 2 facing away from the nozzle holder 1 is equipped with a slit 5 through which the screw nipple 2 can be rotated with the aid of a screwdriver. A plane surface 8 is formed between a threaded stud portion 6 and a cross-sectionally larger head portion 7 of the screw nipple 2. This plane surface presses an elastic sealing ring 9, for example. a rubber ring, onto an annular surface 10 ot the nozzle holder 1. The more the screw nipple 2 is screwed in. the more the sealing ring 9 is pressed together. In this way, and within certain limits. the final rotational position of the screw nipple 2 is independent of the sealing property. Furthermore. the sealing ring 9 compensates for form changes of the nipple 2 which possibly may occur with the passage of time; for example. if the nipple 2 were made of plastic and dimensional changes occur in time due to creeping or settling. or because of temperature changes or aging.
It is to be appreciated that the foregoing description of illustrative embodiments is not by way of limitation. Many variants and other embodiments are possible within the scope of invention as defined in the appended claims.
What is claimed is:
I. A fuel injection arrangement for internal combustion engines comprising, in combination: a nozzle holder for holding a fuel injection nozzle. and a readily separable hose coupling member screwed into said nozzle holder. said coupling member being a screw nipple having at least one hosereceiving spout to which a hose may be removably connected.
2. A fuel injection arrangement as defined in claim I, wherein said screw nipple includes a threaded stud portion which is screwed into said nozzle holder and a head portion defining a radial end face at that end of said head portion facing said nozzle holder. said nozzle holder having a sealing surface corresponding to said radial end face. and an elastic sealing ring positioned between said sealing surface and said end face.
3. A fuel injection arrangement as defined in claim I, wherein said screw nipple is equipped with two respective hose-receiving spouts which form substantially a T-configuration with the remaining portion of said screw nipple.
4. A fuel injection arrangement as defined in claim 1, wherein an end of said screw nipple facing away from said nozzle holder is provided with a slot. whereby the screw nipple may be rotated by a screw driver.
5. A fuel injection arrangement as defined in claim I, wherein said screw nipple is made of a synthetic. plastic material.
6. A fuel injection arrangement as defined in claim 2, wherein said screw nipple is equipped with two respective hose-receiving spouts which form substantially a T-configuration with the remaining portion of said screw nipple.
tive hose-receiving spouts which form substantially a T-configurution with the remaining portion of said screw nipple H]. A fuel injection arrangement as defined in claim 8. wherein said screw nipple is equipped with two respective hose'receiving spouts which form substantially a T-configuration with the remaining portion of said screw nipple.

Claims (10)

1. A fuel injection arrangement for internal combustion engines comprising, in combination: a nozzle holder for holding a fuel injection nozzle, and a readily separable hose coupling member screwed into said nozzle holder, said coupling member being a screw nipple having at least one hosereceiving spout to which a hose may be removably connected.
1. A fuel injection arrangement for internal combustion engines comprising, in combination: a nozzle holder for holding a fuel injection nozzle, and a readily separable hose coupling member screwed into said nozzle holder, said coupling member being a screw nipple having at least one hosereceiving spout to which a hose may be removably connected.
2. A fuel injection arrangement as defined in claim 1, wherein said screw nipple includes a threaded stud portion which is screwed into said nozzle holder and a head portion defining a radial end face at that end of said head portion facing said nozzle holder, said nozzle holder having a sealing surface corresponding to said radial end face, and an elastic sealing ring positioned between said sealing surface and said end face.
3. A fuel injection arrangement as defined in claim 1, wherein said screw nipple is equipped with two respective hose-receiving spouts which form substantially a T-configuration with the remaining portion of said screw nipple.
4. A fuel injection arrangement as defined in claim 1, wherein an end of said screw nipple facing away from said nozzle holder is provided with a slot, whereby the screw nipple may be rotated by a screw driver.
5. A fuel injection arrangement as defined in claim 1, wherein said screw nipple is made of a synthetic, plastic material.
6. A fuel injection arrangement as defined in claim 2, wherein said screw nipple is equipped with two respective hose-receiving spouts which form substantially a T-configuration with the remaining portion of said screw nipple.
7. A fuel injection arrangement as defined in claim 2, wherein an end of said screw nipple facing away from said nozzle holder is provided with a slot, whereby the screw nipple may be rotated by a screwdriver.
8. a fuel injection arrangement as defined in claim 2, wherein said screw nipple made of a synthetic, plastic material.
9. A fuel injection arrangement as defined in claim 7, wherein said screw nipple is equipped with two respective hose-receiving spouts which form substantially a T-configuration with the remaining portion of said screw nipple.
US435171A 1973-02-17 1974-01-21 Fuel injection arrangement Expired - Lifetime US3887140A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732308001 DE2308001A1 (en) 1973-02-17 1973-02-17 FUEL INJECTOR

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US3887140A true US3887140A (en) 1975-06-03

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JP (1) JPS5741582B2 (en)
DE (1) DE2308001A1 (en)
GB (1) GB1467482A (en)
IT (1) IT1009634B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1302655A2 (en) * 2001-10-12 2003-04-16 C.R.F. Società Consortile per Azioni Device for fluidtight connection of a fitting to an internal combustion engine fuel injector
US10400730B2 (en) * 2015-07-09 2019-09-03 Delphi Technologies Ip Limited Fuel injector having external setting of the coil spring
US20220412299A1 (en) * 2021-06-29 2022-12-29 Volvo Truck Corporation Fuel conduit connection assembly for a vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3010328A1 (en) * 1980-03-18 1981-09-24 Robert Bosch Gmbh, 7000 Stuttgart IC engine fuel injection nozzle - has radial pipe connection with sealing force along nozzle axis

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2373353A (en) * 1941-09-16 1945-04-10 Paul B Shannon Nozzle
US2598961A (en) * 1945-12-10 1952-06-03 Orrin E Andrus Irrigation regulator coupling
US2680652A (en) * 1946-02-15 1954-06-08 Babcock & Wilcox Co Atomizer
US3159350A (en) * 1961-03-06 1964-12-01 Bendix Corp Fuel injection valve device
US3270966A (en) * 1964-07-15 1966-09-06 Deere & Co Sprayer nozzle
US3540660A (en) * 1967-10-27 1970-11-17 Atom Auto Pecas Ltda Fuel inlet vaporizers for carburators
US3637142A (en) * 1969-12-04 1972-01-25 James E Gassaway Multinozzle spraying apparatus
US3771730A (en) * 1971-05-04 1973-11-13 Almo Manifold And Tool Co Liquid spray system for metal rolling

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2373353A (en) * 1941-09-16 1945-04-10 Paul B Shannon Nozzle
US2598961A (en) * 1945-12-10 1952-06-03 Orrin E Andrus Irrigation regulator coupling
US2680652A (en) * 1946-02-15 1954-06-08 Babcock & Wilcox Co Atomizer
US3159350A (en) * 1961-03-06 1964-12-01 Bendix Corp Fuel injection valve device
US3270966A (en) * 1964-07-15 1966-09-06 Deere & Co Sprayer nozzle
US3540660A (en) * 1967-10-27 1970-11-17 Atom Auto Pecas Ltda Fuel inlet vaporizers for carburators
US3637142A (en) * 1969-12-04 1972-01-25 James E Gassaway Multinozzle spraying apparatus
US3771730A (en) * 1971-05-04 1973-11-13 Almo Manifold And Tool Co Liquid spray system for metal rolling

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1302655A2 (en) * 2001-10-12 2003-04-16 C.R.F. Società Consortile per Azioni Device for fluidtight connection of a fitting to an internal combustion engine fuel injector
EP1302655A3 (en) * 2001-10-12 2003-07-23 C.R.F. Società Consortile per Azioni Device for fluidtight connection of a fitting to an internal combustion engine fuel injector
US6916048B2 (en) 2001-10-12 2005-07-12 C.R.F. Societa Consortile Per Azioni Device for fluid-tight connection of a fitting to an internal combustion engine fuel injector
US10400730B2 (en) * 2015-07-09 2019-09-03 Delphi Technologies Ip Limited Fuel injector having external setting of the coil spring
US20220412299A1 (en) * 2021-06-29 2022-12-29 Volvo Truck Corporation Fuel conduit connection assembly for a vehicle

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Publication number Publication date
JPS49113038A (en) 1974-10-28
DE2308001A1 (en) 1974-08-22
JPS5741582B2 (en) 1982-09-03
GB1467482A (en) 1977-03-16
IT1009634B (en) 1976-12-20

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