US3857573A - Mounting arrangements for injectors for i.c. engine fuel injection systems - Google Patents

Mounting arrangements for injectors for i.c. engine fuel injection systems Download PDF

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Publication number
US3857573A
US3857573A US00383607A US38360773A US3857573A US 3857573 A US3857573 A US 3857573A US 00383607 A US00383607 A US 00383607A US 38360773 A US38360773 A US 38360773A US 3857573 A US3857573 A US 3857573A
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United States
Prior art keywords
manifold
injector
bore
ring
injectors
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Expired - Lifetime
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US00383607A
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M Pugh
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Lucas Electrical Co Ltd
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Lucas Electrical Co Ltd
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Publication date
Priority claimed from GB3636172A external-priority patent/GB1402023A/en
Application filed by Lucas Electrical Co Ltd filed Critical Lucas Electrical Co Ltd
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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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
    • F16J15/106—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure homogeneous
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine

Definitions

  • a mounting arrangement for a fuel injector on an engine intake manifold includes a sealing ring engaged against a shoulder in a bore in the manifold, An abutment plate is mounted by a bolt or bolts on the manifold and a spring is disposed between the abutment plate and a flexible ring disposed in a groove in the injector.
  • the flexible ring is slidably received in a further bore in the manifold said further bore being coaxial with the first-mentioned bore.
  • the novel mounting arrangement permits a good seal to be obtained between the injector and the manifold without the necessity of employing close tolerance machining.
  • injectors are mounted with the outlet end of each injector inserted into a bore in an air intake manifold of the engine and a simple clamp on the manifold engages a flange or shoulder on the injector to hold the injector body against a seal ring fitted in this bore. It will be appreciated, however, that the effectiveness of such a mounting arrangement depends to a large extent on the machining accuracy of the bore, the clamp seat and the injector body. If the tolerance is too wide, then either the seal can be damaged by overtightening of the clamp or a good seal may not be achieved. Thus, expensive close tolerance machining is necessary.
  • a mounting arrangement for an injector on an engine intake manifold comprises a sealing ring in a bore in the manifold, an abutment mounted on the manifold and a spring acting between said abutment and the injector so as to urge the injector into sealing engagement with said sealing ring.
  • the manifoldl has a stepped bore 11 into which the outlet end of the injector 12 is inserted. This bore opens into an air inlet passage 13.
  • a sealing ring 14 is positioned in the bore 11 and engages an internal annular shoulder 15 therein,
  • the injector 12 has a nozzle 16 which protrudes through the sealing ring 14 and a cylindrical portion 17 which fits within the ring 14.
  • shoulder 18 is formed at the end of this portion 17 remote from nozzle 16 and engages the axial end of the ring 14 opposite that engaging the shoulder 15.
  • the manifold 10 is formed with a flange 19 which has a bore 20 co-axial with the bore 1.1 in the manifold.
  • a rubber or other flexible ring 21 in a groove 21a on the body of the injector is a sliding fit in this bore 20.
  • An abutment in the form of a dished annular plate 22 with one or more lugs 23 offset from the plane of the plate 22 is mounted on the flange 19.
  • a helical compression spring 24 surrounding the injector body is compressed between the plate 22 and an annular, steel support 25 abutting the ring 21 so as to urge the injector body towards the bore 15.
  • the spring 24 is so chosen that it exerts a sufficient force on the injector body to ensure that the shoulder 18 remains in good sealing contact with the seal ring 14 at all times during vibration of the manifold. During such vibration, the ring 21 serves as a shock absorber to protect the injector from damage.
  • a mounting arrangement for an injector on an engine intake manifold comprising a sealing ring in a bore in said manifold, an abutment mounted on said manifold and a spring acting between said abutment and said injector through the intermediary of a flexible means so as to urge said injector into sealing engagement with said sealing ring.

Abstract

A mounting arrangement for a fuel injector on an engine intake manifold includes a sealing ring engaged against a shoulder in a bore in the manifold. An abutment plate is mounted by a bolt or bolts on the manifold and a spring is disposed between the abutment plate and a flexible ring disposed in a groove in the injector. The flexible ring is slidably received in a further bore in the manifold said further bore being co-axial with the first-mentioned bore. The novel mounting arrangement permits a good seal to be obtained between the injector and the manifold without the necessity of employing close tolerance machining.

Description

United States Patent 1191 Pugh . [45] Dec. 31, 1974 MOUNTING ARRANGEMENTS FOR INJECTORS FOR LC. ENGINE FUEL INJECTION SYSTEMS [75] Inventor: Michael Stephen Pugh, Birmingham,
England [73] Assignee: The Lucas Electrical Company Limited, Birmingham, England 22 Filed: July 30,1973 21 Appl. No.: 383,607
7 [30] Foreign Application Priority Data July 28, I972 Great Britain 36361/72 [52] user. ..277/102,123/139 AW [51] mm. Fl6j 15/06 58 1 Field of Search..... 123/139 AW; 277/102, 105,
[56] References Cited UNITED STATES PATENTS 2,893,365 7/1959 Haefner 123/139 AW 3,776,209 l2/l973 Wertheimer l23/l39 AW Primary Examiner-Harry N. Haroian Assistant ExaminerRobert I. Smith Attorney, Agent, or Firm-Holman & Stern 5 7 1 ABSTRACT A mounting arrangement for a fuel injector on an engine intake manifold includes a sealing ring engaged against a shoulder in a bore in the manifold, An abutment plate is mounted by a bolt or bolts on the manifold and a spring is disposed between the abutment plate and a flexible ring disposed in a groove in the injector. The flexible ring is slidably received in a further bore in the manifold said further bore being coaxial with the first-mentioned bore.
The novel mounting arrangement permits a good seal to be obtained between the injector and the manifold without the necessity of employing close tolerance machining.
5 Claims, 1 Drawing Figure MOUNTING ARRANGEMENTS FOR INJECTORS FOR LC. ENGINE FUEL INJECTION SYSTEMS This invention relates to the mounting of injectors for internal combustion engine fuel injection systems.
Conventionally, injectors are mounted with the outlet end of each injector inserted into a bore in an air intake manifold of the engine and a simple clamp on the manifold engages a flange or shoulder on the injector to hold the injector body against a seal ring fitted in this bore. It will be appreciated, however, that the effectiveness of such a mounting arrangement depends to a large extent on the machining accuracy of the bore, the clamp seat and the injector body. If the tolerance is too wide, then either the seal can be damaged by overtightening of the clamp or a good seal may not be achieved. Thus, expensive close tolerance machining is necessary.
It is an object of the invention to provide a mounting arrangement which avoids the above-mentioned disadvantage.
In accordance with the invention, a mounting arrangement for an injector on an engine intake manifold comprises a sealing ring in a bore in the manifold, an abutment mounted on the manifold and a spring acting between said abutment and the injector so as to urge the injector into sealing engagement with said sealing ring.
An example of the invention is shown in the accompanying drawing which shows an injector mounted on an engine air intake manifold, the manifold only being partly shown and being in section.
The manifoldl has a stepped bore 11 into which the outlet end of the injector 12 is inserted. This bore opens into an air inlet passage 13. A sealing ring 14 is positioned in the bore 11 and engages an internal annular shoulder 15 therein, The injector 12 has a nozzle 16 which protrudes through the sealing ring 14 and a cylindrical portion 17 which fits within the ring 14. A
shoulder 18 is formed at the end of this portion 17 remote from nozzle 16 and engages the axial end of the ring 14 opposite that engaging the shoulder 15.
The manifold 10 is formed with a flange 19 which has a bore 20 co-axial with the bore 1.1 in the manifold. A rubber or other flexible ring 21 in a groove 21a on the body of the injector is a sliding fit in this bore 20. An abutment in the form of a dished annular plate 22 with one or more lugs 23 offset from the plane of the plate 22 is mounted on the flange 19. A helical compression spring 24 surrounding the injector body is compressed between the plate 22 and an annular, steel support 25 abutting the ring 21 so as to urge the injector body towards the bore 15.
The spring 24 is so chosen that it exerts a sufficient force on the injector body to ensure that the shoulder 18 remains in good sealing contact with the seal ring 14 at all times during vibration of the manifold. During such vibration, the ring 21 serves as a shock absorber to protect the injector from damage.
I claim:
1. A mounting arrangement for an injector on an engine intake manifold, said mounting arrangement comprising a sealing ring in a bore in said manifold, an abutment mounted on said manifold and a spring acting between said abutment and said injector through the intermediary of a flexible means so as to urge said injector into sealing engagement with said sealing ring.
2. The arrangement according to claim 1, wherein said flexible means is a flexible ring.
3. The arrangement according to claim 2, wherein said flexible ring is carried in a groove in said injector.
secured to said manifold.

Claims (5)

1. A mounting arrangement for an injector on an engine intake manifold, said mounting arrangement comprising a sealing ring in a bore in said manifold, an abutment mounted on said manifold and a spring acting between said abutment and said injector through the intermediary of a flexible means so as to urge said injector into sealing engagement with said sealing ring.
2. The arrangement according to claim 1, wherein said flexible means is a flexible ring.
3. The arrangement according to claim 2, wherein said flexible ring is carried in a groove in said injector.
4. The arrangement according to claim 3, wherein said flexible ring is slidably received in a further bore in said manifold, said further bore being co-axial with the first-mentioned bore.
5. The arrangement according to claim 1, wherein said abutment is formed as a plate which is detachably secured to said manifold.
US00383607A 1972-08-03 1973-07-30 Mounting arrangements for injectors for i.c. engine fuel injection systems Expired - Lifetime US3857573A (en)

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GB3636172A GB1402023A (en) 1971-08-05 1972-08-03 Driving mechanism for a printer

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143625A (en) * 1976-11-26 1979-03-13 Robert Bosch Gmbh Injection valve for internal combustion engines
US4228769A (en) * 1977-03-15 1980-10-21 Bayerische Motoren Werke Aktiengesellschaft Intake-pipe arrangement for in-line internal combustion engines
US4240384A (en) * 1978-06-26 1980-12-23 Centro Ricerche Fiat S.P.A. Induction units for internal combustion engines with petrol injection
US4519371A (en) * 1981-11-04 1985-05-28 Honda Giken Kogyo Kabushiki Kaisha Mounting device for fuel injection nozzles for internal combustion engines
WO1991011610A1 (en) * 1990-01-30 1991-08-08 Siemens Aktiengesellschaft Fuel injector having adapter grommet
US5156129A (en) * 1990-11-13 1992-10-20 Mitsubishi Denki K.K. Fuel supply device for an internal combustion engine
WO1999013213A1 (en) * 1997-09-06 1999-03-18 Robert Bosch Gmbh Fuel injection valve
US6067640A (en) * 1993-05-14 2000-05-23 Fujitsu Limited System for management of software employing memory for processing unit with regulatory information, for limiting amount of use and number of backup copies of software
US6405713B1 (en) * 1999-11-12 2002-06-18 Siemens Automotive Corporation Stamped fuel rail with integrated mounting brackets
US20120280067A1 (en) * 2009-12-09 2012-11-08 Giandomenico Serra Coupling device
US20150176672A1 (en) * 2012-03-27 2015-06-25 Robert Bosch Gmbh holder for fastening a component on an internal combustion engine, a bearing bush for such a holder, and a fuel injection system
US10519914B2 (en) * 2017-11-27 2019-12-31 Hyundai Motor Company Fuel injection system and method of operating a fuel injection system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893365A (en) * 1956-05-31 1959-07-07 Gen Motors Corp Fuel injection means
US3776209A (en) * 1973-04-05 1973-12-04 Bendix Corp Fuel injector manifold and mounting arrangement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893365A (en) * 1956-05-31 1959-07-07 Gen Motors Corp Fuel injection means
US3776209A (en) * 1973-04-05 1973-12-04 Bendix Corp Fuel injector manifold and mounting arrangement

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143625A (en) * 1976-11-26 1979-03-13 Robert Bosch Gmbh Injection valve for internal combustion engines
US4240385A (en) * 1976-11-26 1980-12-23 Robert Bosch Gmbh Injection valve for internal combustion engines
US4228769A (en) * 1977-03-15 1980-10-21 Bayerische Motoren Werke Aktiengesellschaft Intake-pipe arrangement for in-line internal combustion engines
US4240384A (en) * 1978-06-26 1980-12-23 Centro Ricerche Fiat S.P.A. Induction units for internal combustion engines with petrol injection
US4519371A (en) * 1981-11-04 1985-05-28 Honda Giken Kogyo Kabushiki Kaisha Mounting device for fuel injection nozzles for internal combustion engines
WO1991011610A1 (en) * 1990-01-30 1991-08-08 Siemens Aktiengesellschaft Fuel injector having adapter grommet
US5156129A (en) * 1990-11-13 1992-10-20 Mitsubishi Denki K.K. Fuel supply device for an internal combustion engine
US6067640A (en) * 1993-05-14 2000-05-23 Fujitsu Limited System for management of software employing memory for processing unit with regulatory information, for limiting amount of use and number of backup copies of software
WO1999013213A1 (en) * 1997-09-06 1999-03-18 Robert Bosch Gmbh Fuel injection valve
US6405713B1 (en) * 1999-11-12 2002-06-18 Siemens Automotive Corporation Stamped fuel rail with integrated mounting brackets
US6408827B1 (en) * 1999-11-12 2002-06-25 Siemens Automotive Corporation Stamped fuel rail with integrated mounting brackets
US20120280067A1 (en) * 2009-12-09 2012-11-08 Giandomenico Serra Coupling device
US9103308B2 (en) * 2009-12-09 2015-08-11 Continental Automotive Gmbh Coupling device
US20150176672A1 (en) * 2012-03-27 2015-06-25 Robert Bosch Gmbh holder for fastening a component on an internal combustion engine, a bearing bush for such a holder, and a fuel injection system
US10088005B2 (en) * 2012-03-27 2018-10-02 Robert Bosch Gmbh Holder for fastening a component on an internal combustion engine, a bearing bush for such a holder, and a fuel injection system
US10519914B2 (en) * 2017-11-27 2019-12-31 Hyundai Motor Company Fuel injection system and method of operating a fuel injection system

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