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
  • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
  • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
• • 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
• • 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
• • 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
  • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
• • 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
  • F02M2200/8015—Provisions for assembly of fuel injection apparatus in a certain orientation, e.g. markings, notches or specially shaped sleeves other than a clip
• • 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
  • F02M2200/851—Mounting of fuel injection apparatus provisions for adjusting the angular, rotational or axial position of injectors

Definitions

• the invention relates to a multipart fuel injector for a
• Marine diesel engines have several cylinders, each of which is assigned at least one fuel injector to the respective cylinder
• Such fuel injectors are usually constructed of a plurality of longitudinally mounted parts or components, which in a certain orientation (for example, with respect to its longitudinal axis and its
• Rotary position must be fixed or fixed to each other.
• dowel pins have the disadvantage that these during assembly or
• the invention has for its object to provide a multi-part fuel injector, wherein the components in simpler and
• a fuel injector as the plurality of interconnected components includes an injector for injecting fuel, a switching valve for controlling the injection of fuel, and a fuel injector
• connecting sleeve Longitudinal end portion of which has a predetermined outer contour of the valve, and wherein the connecting sleeve has a predetermined sleeve inner contour into which from a first longitudinal end of the connecting sleeve of the injection nozzle with its nozzle outer contour is positively fitted, so that the injection nozzle is fixed in a defined orientation to the connecting sleeve, and in the from a second longitudinal end of the connecting sleeve from the switching valve with its valve outer contour is positively fitted, so that the switching valve is fixed in a defined orientation to the connecting sleeve.
• valve outer contour is positively connected to the
• Sleeve inner contour adapted so that a first positive shaft-hub connection is created as alignment
• the nozzle outer contour is positively adapted to the sleeve inner contour, so that a second positive shaft-hub connection is created as alignment
• valve outer contour and the nozzle outer contour are each formed complementary to the sleeve inner contour.
• the axial cohesion of the individual components of the fuel injector is accomplished as is conventional in the art, e.g. ensured by one or more union nuts, which act on the corresponding annular collars and external threads of the components.
• Nozzle outer contour and the valve outer contour with the sleeve inner contour are the components of the fuel injector in a particularly simple and easy
• the fuel injector according to the invention with the shaft-hub connections realized via polygonal profiles is significantly less sensitive to mechanical stress, so that there is less risk of damage to the alignment means during assembly and disassembly.
• connection sleeve is dimensioned or configured such that it forms the weakest part of the components.
• the connecting sleeve is destroyed or damaged, so that only this has to be exchanged in a simple manner and without various tools.
• the sleeve inner contour can have a different inner diameter at a longitudinal end section matched with the outer contour of the nozzle than at a longitudinal end section matched with the valve outer contour.
• This embodiment of the invention has the advantage of dimensioning the components injection nozzle and switching valve, taking into account the space available and still be able to fit into the common connecting sleeve.
• the nozzle outer contour and the valve outer contour are fitted so positively into the sleeve inner contour that the injection nozzle and the switching valve in each case with respect to its longitudinal axis and its rotational position defines the connection sleeve, which is in particular a centering connection sleeve, aligned.
• the sleeve inner contour has a polygonal shape.
• a polygon shape as they then in a complementary manner on the nozzle outer contour and on the Valve outer contour to create or is available, for example, by non-circular or non-circular grinding or by milling produced.
• the polygonal shape is at least triangular (such as, for example, in the same thickness P3G according to DIN 3271 1) and in particular hexagonal or heptagonal.
• the sleeve inner contour is formed symmetrically with respect to the longitudinal axis of the connecting sleeve.
• Nozzle outer contour of a first projection-recess-fitting provided which a single possible Drehauscardi the injection nozzle for
• Connection sleeve defined, and is provided between the sleeve inner contour and the valve outer contour, a second projection-recess-fit, which a single possible Drehauscardi of the switching valve for
• Connection sleeve defined.
• Sleeve inner contour asymmetric with respect to a longitudinal axis of the
• the polygon-shaped polygon shape preferably has at least one side that has a different length than the other polygonal-shape sides. More preferably, the polygon shape has a first side that is smaller in length than the other sides of the polygon shape, and one second page, which has a greater length than the other sides of the polygon shape.
• a fuel throttle is positively fitted in the sleeve inner contour between the injection nozzle and the switching valve.
• a throttle outer contour is adapted in a form-fitting manner to the sleeve inner contour or is designed to be complementary to the sleeve inner contour, so that a third form-fitting shaft-hub connection is created.
• the throttle outer contour and the sleeve inner contour can be provided in the case of a symmetrical design of this to the longitudinal axis of a projection-recess fit.
• the throttle outer contour simply needs to be formed only complementary to this.
• all shaft-hub connections or positive fits are designed as a slight clearance fit or as a transition fit.
• an internal combustion engine in particular a marine diesel engine, with a fuel injector according to one, several or all of the previously described embodiments of the invention is provided in any conceivable combination.
• a centering and clear positioning ie, a defined orientation
• the alignment is accomplished by means of a polygonal profile.
• Fuel injectors with switching valve become unnecessary dowel pins. This reduces the number of additional parts required for alignment from four to one.
• Dowel pin and an associated Passstattaus predominantlyung transversely to the longitudinal direction of the connecting sleeve) or asymmetrical geometry is a clear positioning or alignment of the injector, the fuel throttle and the switching valve possible.
• Polygon connection transmitted a higher torque than over the previously used in the art dowel pins.
• a polygonal shaft-hub connection such as the shaft-hub connection - polygonal profile P3G (DIN 32711).
• Fig. 1 is an exploded perspective view of a fuel injector
• FIG. 2 shows a perspective view of a connecting sleeve of a
• Fuel injector according to another embodiment of the invention.
• connection sleeve 3 shows a cross-sectional view or end view of the connection sleeve of FIG.
• FIG. 4 shows a longitudinal sectional view of the connecting sleeve of Figure 2, seen along a line AA in Figure 3.
• 1 shows an exploded perspective view of a designed according to a first embodiment of the invention fuel injector 1 of a here designed as a marine diesel engine engine (not fully shown).
• the injector 1 has an injector 10 for injecting fuel (here, diesel fuel), a switching valve 20 for controlling (permitting / inhibiting) the injection of fuel, and a connection sleeve 30 located between the injector 10 and the switching valve 20.
• fuel here, diesel fuel
• switching valve 20 for controlling (permitting / inhibiting) the injection of fuel
• connection sleeve 30 located between the injector 10 and the switching valve 20.
• the injection nozzle 10 has a predetermined nozzle outer contour 12 on a longitudinal end section 1 facing the connection sleeve 30, and the switching valve 20 has a predetermined valve outer contour 22 on a longitudinal end section 21 facing the connection sleeve 30.
• the connecting sleeve 30 in turn has a predetermined sleeve inner contour 33 into which the injection nozzle 10 with its nozzle outer contour 12 is positively fitted from a first longitudinal end 31 of the connecting sleeve 30, so that the injection nozzle 10 is fixed in a defined orientation to the connecting sleeve 30.
• sleeve inner contour 33 is also fitted by a second longitudinal end 32 of the connecting sleeve 30 from the switching valve 20 with its valve outer contour 22 form fit, so that the switching valve 20 in a defined
• Orientation is determined to the connection sleeve 30.
• valve outer contour 22 is positively connected to the
• valve outer contour 12 and the nozzle outer contour 22 are each formed complementary to the sleeve inner contour 33.
• Switching valve 20 a fuel throttle 40 fixed in a defined orientation to the connecting sleeve 30 positively fitted.
• a throttle outer contour 41 of the fuel throttle 40 is positively adapted to the sleeve inner contour 33 or formed complementary to the sleeve inner contour 33, so that a third positive shaft-hub connection is created as alignment.
• all shaft-hub connections or positive fits are designed as a slight clearance fit or as a transition fit.
• the injection nozzle 10 has a longitudinal axis L1
• the switching valve 20 has a longitudinal axis L2
• the connecting sleeve 30 has a longitudinal axis L3
• the fuel throttle 40 has a longitudinal axis L4.
• the nozzle outer contour 12, the valve outer contour 22 and the throttle outer contour 41 are fitted in a form-fitting manner in the sleeve inner contour 33, that the injection nozzle 10, the switching valve 20 and the
• Fuel throttle 40 respectively defined with respect to their longitudinal axis L, L2 and L4 and their rotational position about the respective longitudinal axis L1, L2 and L4 to
• Connecting sleeve 30 are aligned. In other words, the
• Nozzle outer contour 22 and the throttle outer contour 41 each have a polygonal shape and the sleeve inner contour 33 has one of these outer contours
• the inner and outer polygon shapes are e.g. can be produced by non-circular or non-circular grinding or by milling.
• the respective polygon shapes of the components of the fuel injector 1 are at least triangular and, according to FIG.
• Embodiment of the invention has the advantage, in particular the components
• Injector 10 and switching valve 20 dimensioning taking into account the space and still be able to fit into the common connection sleeve 30.
• the respective polygonal shapes (valve outer contour 12, outer nozzle contour 22, inner sleeve contour 33 and outer throttle contour 41) of the components of the fuel injector 1 are each asymmetrically formed with respect to their longitudinal axes L1, L2, L3 and L4, respectively, to be unique
• the components of the fuel injector 1 can be used only in a single predefined rotational positioning in the connecting sleeve 30.
• each polygon shape has a plurality of sides S, S ', S "and these connecting vertices E and at least one side S ⁇ S" (three sides in FIG. 1) that have a different length than the other sides S of the polygon shape Has.
• each polygon shape has three sides S ', S "having a smaller length than the other sides S of the polygonal shape, with one side S" of these smaller-length sides S', S “having a length smaller than that other sides S 'of these smaller-length-formed sides S', S "of the polygonal shape.
• Figures 2 to 4 show views of a formed according to a second embodiment of the invention connecting sleeve 30a of a fuel injector 1 a (not fully shown) designed as a marine diesel engine
• the fuel injector 1 a according to the second embodiment of the invention is formed identical to the fuel injector 1 according to the first embodiment of the invention, except for some differences. Therefore, only these differences are shown below, wherein the same or similar components as in Figure 1 are denoted by the same or similar reference numerals, and wherein the reference numerals of modified components of the small letter "a" readjusted is.
• the respective polygon shapes of the components of the fuel injector 1a are at least triangular and here
• Fuel injectors 1a are each again unsymmetrical with respect to their
• Connecting sleeve 30a can be used.
• each polygon shape has the
• Components of the fuel injector 1a on a plurality of sides S, S ', S "and these connecting corners E and at least one side S', S" (in the figures 2-4 two sides), which have a different length than the other sides S has the polygon shape.
• Fuel injector 1a has a first side S "having a smaller length (LY) than the other sides S of the polygonal shape, and a second side S 'having a greater length (L + X) than the other sides S (having the Length dimension L) of the polygonal shape,
• the length dimension X is equal to the length dimension Y.
• Choke outer contour be formed symmetrically with respect to their longitudinal axes.
• a first projection-recess-fit is provided between the sleeve inner contour and the nozzle outer contour, which defines a single possible rotational orientation of the injection nozzle to the connection sleeve.
• a second projection-recess fit is provided between the sleeve inner contour and the valve outer contour, which defines a single possible rotational orientation of the switching valve to the connecting sleeve.
• a projection-recess fit is then also provided between the throttle outer contour and the sleeve inner contour, which defines a single possible rotational alignment of the fuel throttle to the connecting sleeve.
• Each projection-recess fit may be e.g. in the form of an arrangement of a depthwise transversely to the longitudinal axis (of injection nozzle, switching valve or
• Fuel throttle extending in the respective outer contours

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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 (1)

Applications Claiming Priority (2)

Publications (1)

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Citations (4)

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• 2012
  • 2012-03-07 DE DE102012203621A patent/DE102012203621A1/de active Pending
• 2013
  • 2013-03-05 FI FI20135208A patent/FI126732B/fi active IP Right Grant
  • 2013-03-06 KR KR1020130023729A patent/KR101941714B1/ko active IP Right Grant
  • 2013-03-07 CN CN201310072666.3A patent/CN103306876B/zh active Active
  • 2013-03-07 JP JP2014560277A patent/JP6068516B2/ja active Active
  • 2013-03-07 WO PCT/EP2013/000677 patent/WO2013131652A1/de active Application Filing

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