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
  • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
  • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
  • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting

Definitions

• Arrangement comprising a housing part of an internal combustion engine, a fuel injector and a clamping claw
• the invention relates to an arrangement comprising a housing part of an internal combustion engine having a bore, a in the bore of the housing part at least partially received fuel injector and a clamping claw, via the Pratzkraft the fuel injector is biased in the direction of its longitudinal axis A against the housing part. Furthermore, the invention relates to a fuel injector for such an arrangement and the use of a clamping claw for fixing a fuel! Njektors on a housing part of an internal combustion engine.
• a fuel injector for internal combustion engines which has a housing which comprises at least two respective pressure chamber enclosing a high-pressure body, which lie against each other via contact surfaces and are clamped by means of a clamping device.
• a clamping device In order to ensure a high-pressure-tight connection of the high-pressure bodies, it is proposed in this publication to provide at least one contact surface with a biting edge.
• the biting edge is intended to cause a particularly favorable surface pressure distribution in the region of the high-pressure seal when the high-pressure bodies are braced against one another by means of a clamping nut, with the biting edge digging into the end face of the respective other body.
• the clamping nut has an internal thread and the housing has a corresponding
• an injector for injecting fuel into the combustion chambers of internal combustion engines is also known, which can be fixed by means of a clamping claw on a housing part of an internal combustion engine.
• the injector is inserted into a bore of the housing part and held in the bore by the force of the clamping claw.
• the present invention has the object, an assembly comprising a housing part having a bore, a bore at least partially received fuel injector and a clamping claw for fixing the fuel! Njektors on the housing part easier to design.
• the proposed arrangement comprises a housing part of an internal combustion engine having a bore, a in the bore of the housing part at least partially received fuel injector and a clamping claw, the fuel injector in the direction of its longitudinal axis A can be prestressed against the housing part by their Pratzkraft.
• the fuel! Njektor supported directly or indirectly on the housing part and the clawing force of the clamping claw causes a high pressure-tight connection of at least one plate-shaped component of the fuel! Njektors with a nozzle body and / or a holding body of the fuel! njektors.
• the clawing force of the clamping claw is therefore not only used to fix the injector on the housing part, but also as a sealing force in order to realize a high-pressure-tight connection of at least one first component with a second component of the injector.
• the clawing force as a sealing force
• the use of a nozzle clamping nut and / or a valve clamping screw is dispensable, via the screw connection to the injector an axial force can be generated, which usually has the required high pressure sealing force.
• te connection of the components causes.
• the production of the fuel simplified so that the manufacturing costs are reduced.
• the number of components is reduced, on the other hand, the structure of the components is simplified because at least one thread is eliminated. Furthermore, a factory leakage test can be omitted.
• the clamping claw By acting in the longitudinal direction of the injector Pratzkraft the clamping claw can be effected in the region of at least one sealing point depending on the specific configuration of the support of the injector on the housing part a high-pressure-tight seal. It is important to form sealing points in the area of the contact surfaces of two adjacent components.
• the one component is supported directly or indirectly on the housing part of the internal combustion engine and the other component is acted upon directly or indirectly by the Pratzkraft of the clamping claw.
• the clamping claw thus cooperates with the housing part of the internal combustion engine for generating the clawing force serving as sealing force.
• the clamping claw is screwed by means of a fastening screw in the housing part.
• the bore of the housing part on an obliquely, in particular radially, with respect to the longitudinal axis A of the injector extending support surface for the axial support of the fuel injector.
• the support surface is further preferably annular. It can also be formed by a radially extending shoulder or a cone-shaped portion of the bore. This has the advantage that a uniform application of force is guaranteed.
• the injector can also be supported outside the bore on the housing part.
• the housing part the obliquely, in particular radially, with respect to the longitudinal axis A of the injector extending support surface - and that outside the bore - on.
• the support surface the above applies.
• At least one plate-shaped component is a throttle plate and / or a valve plate.
• the Pratzkraft the clamping claw is then preferably the high-pressure-tight connection of the throttle plate with the valve plate and / or with a nozzle body, which usually rests on the side facing away from the valve plate of the throttle plate.
• the clawing force of the clamping claw of the high-pressure-tight connection of the valve plate can be used with a holding body, which usually rests on the side of the valve plate facing away from the throttle plate.
• a holding body which usually rests on the side of the valve plate facing away from the throttle plate.
• the injector is preferably supported on the housing part of the internal combustion engine via the nozzle body.
• the nozzle body may have a radial shoulder over which it rests directly or indirectly on a support surface of the housing part.
• the support surface is preferably designed as an annular surface and preferably formed within the bore, in which the injector is at least partially received.
• the bore may be formed as a stepped bore in order to realize the annular surface.
• the further proposed for an inventive arrangement fuel injector is characterized in that it for the temporary or permanent connection of at least one plate-shaped component of the fuel injector with a nozzle body and / or a holding body of the fuel! Njektors comprises a holding device.
• the holding device is preferably detachable with the fuel! connectable to the injector. In this way - at least during transport, ie before the determination of the injector on the housing part of the internal combustion engine - a connection of the components are effected, which is not initially high pressure-tight. Because this requires the Pratzkraft the Spannpratze.
• the task of the holding device is essentially to connect the individual components captive.
• the holding device Before the insertion of the injector into the bore of the housing part, the holding device is advantageously removed, since the injector without such a holding device has a smaller space requirement. If the injector is supported on the outside of the housing part, the holding device can also remain permanently connected to the injector and the support of the injector on the housing part can be made indirectly via the holding device. The holding device can serve in this way the radial positional fixation of the injector or individual components of the injector. If the injector is at least partially inserted into a bore of the housing part, preferably the bore serves for the radial support. According to one embodiment of the invention, the holding device comprises at least one sleeve, a clip, a bracket or the like.
• Both the bracket and the bracket allow a releasable connection of the holding device with the injector.
• the holding device has at least one latching element which can be brought into engagement with a recess of at least one plate-shaped component, the nozzle body and / or the holding body.
• the recess is preferably formed on the outer peripheral side of a component of the injector, preferably in the form of a circumferential groove or a circumferential paragraph.
• a clamping claw for fixing a fuel injector on a housing part of an internal combustion engine
• the fuel! Njektor at least partially received in a bore of a housing part and is supported directly or indirectly on the housing part
• the Pratzkraft the clamping claw is used for high-pressure sealing connection of at least one plate-shaped component of the fuel injector with a nozzle body and / or a holding body of the fuel injector.
• the use of the clawing force of the clamping claw as a sealing force allows a nozzle tension-free design of the fuel injector. In this way, the configuration of the injector can be simplified and at the same time a high-pressure-tight connection of the components of the injector can be achieved. By eliminating the nozzle retaining nut, the production costs can be reduced at the same time.
• Fig. 1 is a schematic longitudinal section through an inventive arrangement
• Fig. 2 is a schematic longitudinal section through a fuel injector according to the invention. Detailed description of the drawings
• FIG. 1 An arrangement according to the invention is shown by way of example in FIG. 1.
• the illustrated arrangement includes a fuel! Njektor 3, which is received in a bore 2 of a housing part 1 of an internal combustion engine and fixed by means of a clamping claw 4 on the housing part 1.
• the clamping claw 4 is attached thereto by means of a fastening screw 14 on the housing part 1.
• the clamping claw 4 exerts an axial force, the so-called Pratzkraft, on the injector 3, which presses the injector 3 against serving as a support surface 9 paragraph of the bore 2.
• individual components of the injector 3, namely a nozzle body 7, a throttle plate 5, a valve plate 6 and a holding body 8, axially biased against each other.
• the bias in the axial direction causes the components are connected to each other high pressure tight in the range of sealing points 13, since the Pratzkraft the clamping claw 4 due to a non-existing nozzle lock nut also serves as a sealing force.
• Another sealing point 13, which is sealed high-pressure-tight over the Pratzkraft the clamping claw 4 is formed between the nozzle body 7 and the support surface 9 of the housing part 1.
• An inventive fuel! Njektor is exemplified in FIG. 2 can be seen.
• the injector 3 has no nozzle retaining nut, so that other means for axially biasing a nozzle body 7, a throttle plate 5, a valve plate 6 and a holding body 8 are provided against each other.
• These means comprise a plurality of holding devices 10, which are sleeve-shaped or clip-like.
• the clip-type holding devices 10 encompass a component arrangement consisting of nozzle body 7, throttle plate 5, valve plate 6 and holding body 8, so that they ensure cohesion of the component arrangement.
• the clamps are equipped on both sides with latching elements 11 which engage in a recess 12 of the injector 3 designed as a circumferential groove or engage behind a shoulder of the injector 3, so that in each case a positive connection is effected.
• Holding device 10 is placed on the nozzle body 7 remote from the end of the injector 3.
• the cup shape of the holding device 10 at the same time a contact surface for the plant of the clamping claw (not shown in Fig. 2) on the injector 3 is created.
• the holding device 10 thus serves at the same time as a force transmission member, which the Pratzkraft (see arrows) on the fuel! 3 injector transmits.
• the sleeve-shaped or cup-shaped retaining device 10 likewise has a latching element which, in the present case, has the shape of a collar extending radially inward, which engages with a recess 12 of the injector 3 configured as a circumferential groove.
• the cup-shaped holding device 10 has a bore 17 for carrying out a feed line 16, which is connected to an inlet channel 15 of the injector 3.
• the bore 17 is in the present case designed as a stepped bore, so that over the stage a positive connection with the likewise step-shaped supply line 16 can be produced.
• a high pressure-tight connection of the feed line 16 to the inlet channel 15 can be effected via the Pratzkraft (see arrows).
• the connection area thus represents a further sealing point 13.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Fuel-Injection Apparatus (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47878069

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Citations (3)

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• 2012
  • 2012-04-05 DE DE201210205701 patent/DE102012205701A1/de not_active Withdrawn
• 2013
  • 2013-03-14 IN IN7380DEN2014 patent/IN2014DN07380A/en unknown
  • 2013-03-14 CN CN201380018468.7A patent/CN104603446B/zh not_active Expired - Fee Related
  • 2013-03-14 WO PCT/EP2013/055276 patent/WO2013149799A1/de active Application Filing
  • 2013-03-14 EP EP13709135.1A patent/EP2841758B1/de not_active Not-in-force

Patent Citations (3)

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