EP1887215A1 - Dispositif de serrage et culasse - Google Patents

Dispositif de serrage et culasse Download PDF

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Publication number
EP1887215A1
EP1887215A1 EP06016048A EP06016048A EP1887215A1 EP 1887215 A1 EP1887215 A1 EP 1887215A1 EP 06016048 A EP06016048 A EP 06016048A EP 06016048 A EP06016048 A EP 06016048A EP 1887215 A1 EP1887215 A1 EP 1887215A1
Authority
EP
European Patent Office
Prior art keywords
fixation means
clamping device
injector
fork
elastic element
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.)
Withdrawn
Application number
EP06016048A
Other languages
German (de)
English (en)
Inventor
Roberto Ricci
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.)
Continental Automotive GmbH
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP06016048A priority Critical patent/EP1887215A1/fr
Publication of EP1887215A1 publication Critical patent/EP1887215A1/fr
Withdrawn legal-status Critical Current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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws

Definitions

  • the invention relates to a clamping device and a cylinder head arrangement which comprises the clamping device.
  • the clamping device is arranged for clamping an injector against an injector seat.
  • the clamping device has a fixation means for rigidly coupling the clamping device to a body which comprises the injector seat.
  • the fixation means has a fixation means head and a fixation means body.
  • EP 1 262 652 A1 discloses a cylinder head and an injector which is arranged at the cylinder head.
  • the injector is clamped against the cylinder head at least at one clamping area of the injector.
  • a dumping element is arranged which is generally formed by one of the materials, for example, graphite, polyformaldehyde, polytetrafluorethylen, memory metal.
  • the invention is distinguished, concerning a first aspect of the invention, by a clamping device for clamping an injector against an injector seat.
  • the clamping device comprises a fixation means for rigidly coupling the clamping device to a body which comprises the injector seat.
  • the fixation means has a fixation means head and a fixation means body. At least one elastic element is penetrated by the fixation means body.
  • the fixation means head forms a positive stop for the elastic element.
  • a washer has a spherical side and a flat side and is arranged on the fixation means body. The flat side of the washer is coupled to the elastic element.
  • a fork has two prongs for a coupling with the injector and a bended handle.
  • the bended handle comprises a recess which is penetrated by the fixation means body and which has a spherical section forming a sphere-sphere coupling with the spherical side of the washer.
  • the sphere-sphere coupling contributes to a proper axial coupling of the fork to the washer independent from the orientation of the fork.
  • the prongs of the fork hold the injector in its position rectangular to an axis of the injector. It is especially advantageous, if the fixation means comprises a screw, because then a defined clamping force may be easily applied on the injector.
  • the bend of the handle of the fixation element contributes to a proper coupling of the injector to the injector seat.
  • the clamping device comprises a retainer body.
  • the retainer body has a ring-shaped section which is penetrated by the fixation means body.
  • the ring-shaped section is arranged between the fixation means head and the elastic element. This is especially advantageous if an outer diameter of the fixation means head is smaller than an inner diameter of the elastic element. Further, this may contribute to avoid friction between the fixation means head and the elastic element.
  • the retainer body has a cylinder-shaped section.
  • the cylinder-shaped section of the retainer body is penetrated by the fixation means body and penetrates the elastic element, the washer, and the fork. This may contribute to a proper coupling of the elastic element, the washer, and/or the fork to the clamping device.
  • the clamping device comprises a retaining ring.
  • the retaining ring is fixed to the cylinder-shaped section of the retainer body in such a way that the elastic element, the fork, and the washer are held between the retaining ring and the ring-shaped section of the retainer body.
  • the clamping device may be pre-assembled in such a way that the cylinder-shaped section of the retainer body penetrates the elastic element, the washer, and the fork, while the ring-shaped section of the retainer body and the retaining ring hold the elastic element, the washer, and the fork on the cylinder-shaped section of the retainer body. So, the pre-assembled clamping device has only two loose parts: the pre-assembled parts and the fixation means. This contributes to an easy and cheap assembling of the clamping device.
  • the retaining ring is partly arranged in a groove of the cylinder-shaped section of the retainer body. This contributes to an easy and proper fixation of the retaining ring to the retainer body.
  • the elastic element comprises at least one Belleville spring. This contributes to a proper elastic coupling of the washer and the fork.
  • the fork is S-shaped. This may contribute to a proper axial clamping force of the fork against the injector.
  • the invention is distinguished, concerning a second aspect of the invention, by a cylinder head arrangement.
  • the cylinder head arrangement comprises a cylinder head of an internal combustion engine. Further, the cylinder head arrangement comprises the clamping device and the injector.
  • the clamping device is fixed to the cylinder head with an axial end of the fixation means body facing away from the fixation means head.
  • a recess of the cylinder head comprises the injector seat.
  • the injector is clamped to the recess of the cylinder head by the clamping device and is arranged between the prongs of the fork and the injector seat of the cylinder head.
  • a cylinder head arrangement (figure 1) comprises a clamping device 2, a cylinder head 20, and an injector 28.
  • the cylinder head arrangement may be a part of an internal combustion engine.
  • the internal combustion engine is arranged in a vehicle.
  • the clamping device 2 comprises at least a fixation means 4, an elastic element 10, a washer 12, and a fork 14.
  • the fixation means 4 comprises a fixation means head 6 and a fixation means body 8.
  • the elastic element 10 has a recess of the elastic element 10 and is stuck onto the fixation means body 8.
  • the fixation means body 8 penetrates the elastic element 10 through the recess of the elastic element 10.
  • the fixation means head 6 forms a positive stop for the elastic element 10.
  • the washer 12 has a flat side, a spherical side, and a recess of the washer 12.
  • the washer 12 is stuck onto the fixation means 4 in such a way that the fixation means body 8 penetrates the recess of the washer 12.
  • the washer 12 is arranged in such a way that the flat side of the washer 12 is coupled to the elastic element 10.
  • the fork 14 preferably comprises two prongs 17 (figure 2) and a bended handle 15 which is bended at a bend 16. Further, the fork 14 comprises a recess 18 of the fork 14.
  • the recess 18 of the fork 14 has a spherical section 19.
  • the spherical section 19 of the recess 18 of the fork 14 is coupled to the spherical side of the washer 12. So, the spherical side of the washer 12 and the spherical section 19 of the recess 18 of the fork 14 form a sphere-sphere coupling.
  • the fork 14 is arranged in such a way that an open side of the bend 16 is facing away from the washer 12. In other words: an outer side of the bend 16 is facing towards the washer 12.
  • the clamping device 2 is fixed to the cylinder head 20 by the fixation means body 8 and a fixation recess 22 of the cylinder head 20.
  • the fixation means 4 comprises a screw and the fixation means body 8 comprises a thread of the screw.
  • the fixation recess 22 of the cylinder head 20 comprises a corresponding thread for the screw.
  • the screw enables an easy fixation of the clamping device 2 to the cylinder head 20. Further, the screw enables in an easy way to load the clamping device 2, in particular the elastic element 10 with a given force.
  • the injector 28 is arranged in an injector recess 24 of the cylinder head 20.
  • the injector 28 is clamped between the prongs 17 of the fork 14 and an injector seat 26 of the cylinder head 20.
  • the screw is screwed towards the cylinder head 20, a force is applied on the elastic element 10 and is transferred to the fork 14, in particular to the bend 16 of the fork 14, by the washer 12.
  • the elastic element 10 and the fork 14 are elastically deformed by the force.
  • the force is transferred to the injector 28 by the fork 14, in particular by the prongs 17 of the fork 14.
  • the bended handle 15 of the fork 14 contributes to a proper force transfer from the fixation means 4 to the injector 28.
  • the sphere-sphere coupling enables to turn the fork 14 around an axis of the fixation means 4. Further the sphere-sphere coupling enables a movement of the prongs 17 parallel to an axis of the injector 28 in small range. So, the fork 14 and the sphere-sphere coupling enable a flexible coupling of the injector 28 to the cylinder head 20.
  • the flexible coupling may contribute to compensate a system tolerance of the injector 28 and/or of the cylinder head 20. For example, because of the system tolerance the position of the injector recess 24 of the cylinder head 20 varies from one cylinder head 20 to another cylinder head 20 which may be compensated by turning the fork 14 around the axis of the fixation means 4.
  • the axial position of the injector 2 varies,which may be compensated by moving the prongs 14 parallel to the axis of the injector 28.
  • the sphere-sphere coupling enables in each of the orientations of the fork 14 mentioned above a proper force transfer in an axial direction from the fixation means 4 to the fork 14 and further to the injector 28.
  • the injector 28 is arranged between the two prongs 17 of the fork 14. So, turning the fork 14 around the axis of the fixation means 4 leads to a movement of the injector 28 rectangular to the axis of the injector 28. So, the position of the injector 28 in the injector recess 24 rectangular to the axis of the injector 28 may be given by the fork 14.
  • the clamping device 2 comprises a retainer body 32 (figure 3).
  • the retainer body 32 comprises a ring-shaped section 34.
  • the ring-shaped section 34 is arranged between the elastic element 10 and the fixation means head 6.
  • the ring-shaped section 34 of the retainer body 32 is specially advantageous, if an inner diameter of the elastic element 10 is larger than an outer diameter of the fixation means head 6.
  • the retainer body 32 comprises a cylinder-shaped section 36.
  • the cylinder-shaped section 36 is penetrated by the fixation means body 8.
  • the cylinder-shaped section 36 of the retainer body 32 penetrates the elastic element 10, the washer 12, and the fork 14.
  • a retaining ring 38 is fixed to the cylinder-shaped section 36 of the retainer body 32.
  • the retaining ring 38 may be welded to the cylinder-shaped section 36 of the retainer body 32.
  • the retainer body 32 comprises a groove at the cylinder-shaped section 36 in which the retaining ring 38 is arranged. Then, the retaining ring 38 preferably does not extend around the whole circumference of the cylinder-shaped section 36.
  • the retainer body 32 and the retaining ring 38 take in the elastic element 10, the washer 12, and the fork 14 in axial direction.
  • the retainer body 32 and the retaining ring 38 preferably are arranged and formed in such a way that the elastic element 10, the washer 12, and the fork 14 are held together by the retainer body 32 and the retaining ring 38.
  • the clamping device 2 may comprise only two loose parts.
  • a first part comprises the retainer body 32 and the retaining ring 38 which hold the elastic element 10, the washer 12, and the fork 14 and is preferably pre-assembled.
  • a second part of the clamping device 2 is the fixation means 4. Having only these two loose parts may contribute to an very easy and cheap assembling of the clamping device and/or of the clamping device to the cylinder head 20.
  • the elastic element 10 comprises at least one, preferably more Belleville springs 30.
  • the Belleville springs 30 contribute to a proper transfer of the force from the fixation means 4 to the fork 14 while being very robust and having a long lifetime.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP06016048A 2006-08-01 2006-08-01 Dispositif de serrage et culasse Withdrawn EP1887215A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06016048A EP1887215A1 (fr) 2006-08-01 2006-08-01 Dispositif de serrage et culasse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06016048A EP1887215A1 (fr) 2006-08-01 2006-08-01 Dispositif de serrage et culasse

Publications (1)

Publication Number Publication Date
EP1887215A1 true EP1887215A1 (fr) 2008-02-13

Family

ID=37668285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06016048A Withdrawn EP1887215A1 (fr) 2006-08-01 2006-08-01 Dispositif de serrage et culasse

Country Status (1)

Country Link
EP (1) EP1887215A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012054601A3 (fr) * 2010-10-20 2012-08-23 Illinois Tool Works Inc. Ensemble support d'injecteur de carburant
CN103573510A (zh) * 2012-07-30 2014-02-12 广西玉柴机器股份有限公司 电控喷油器固定压板
WO2020229775A1 (fr) * 2019-05-13 2020-11-19 Vianney Rabhi Insert d'allumage a prechambre active
EP3945206A1 (fr) * 2020-07-30 2022-02-02 DEUTZ Aktiengesellschaft Surface de serrage d'injecteur

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1335736A (en) * 1971-02-05 1973-10-31 Cav Ltd Fuel injector
GB1346501A (en) * 1970-03-12 1974-02-13 Burmeister & Wains Mot Mask Fuel injection valves for internal combustion engines
GB2213197A (en) * 1987-12-05 1989-08-09 Perkins Engines Group I.C. engine fuel injector clamp
FR2756872A1 (fr) 1996-12-06 1998-06-12 Renault Dispositif de fixation pour un injecteur de moteur a combustion interne
JP2000120508A (ja) * 1998-10-20 2000-04-25 Kubota Corp エンジンの燃料噴射器固定装置
US6170467B1 (en) 1997-05-20 2001-01-09 Automobiles Peugeot Device for fixing a fuel injector on an internal combustion engine cylinder head, and method for fixing said injector
EP1262652A2 (fr) 2001-05-30 2002-12-04 Siemens Aktiengesellschaft Culasse avec injecteur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1346501A (en) * 1970-03-12 1974-02-13 Burmeister & Wains Mot Mask Fuel injection valves for internal combustion engines
GB1335736A (en) * 1971-02-05 1973-10-31 Cav Ltd Fuel injector
GB2213197A (en) * 1987-12-05 1989-08-09 Perkins Engines Group I.C. engine fuel injector clamp
FR2756872A1 (fr) 1996-12-06 1998-06-12 Renault Dispositif de fixation pour un injecteur de moteur a combustion interne
US6170467B1 (en) 1997-05-20 2001-01-09 Automobiles Peugeot Device for fixing a fuel injector on an internal combustion engine cylinder head, and method for fixing said injector
JP2000120508A (ja) * 1998-10-20 2000-04-25 Kubota Corp エンジンの燃料噴射器固定装置
EP1262652A2 (fr) 2001-05-30 2002-12-04 Siemens Aktiengesellschaft Culasse avec injecteur

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012054601A3 (fr) * 2010-10-20 2012-08-23 Illinois Tool Works Inc. Ensemble support d'injecteur de carburant
CN103573510A (zh) * 2012-07-30 2014-02-12 广西玉柴机器股份有限公司 电控喷油器固定压板
CN103573510B (zh) * 2012-07-30 2015-12-30 广西玉柴机器股份有限公司 电控喷油器固定压板
WO2020229775A1 (fr) * 2019-05-13 2020-11-19 Vianney Rabhi Insert d'allumage a prechambre active
FR3096078A1 (fr) * 2019-05-13 2020-11-20 Vianney Rabhi Insert d’allumage a prechambre active
EP3945206A1 (fr) * 2020-07-30 2022-02-02 DEUTZ Aktiengesellschaft Surface de serrage d'injecteur
US11603816B2 (en) 2020-07-30 2023-03-14 Deutz Aktiengesellschaft Injector clamping mechanism

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