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
  • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
  • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
  • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
  • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
  • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
• • 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
  • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
• • 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
  • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
• • 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
  • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
  • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

• DE 100 08 554 A1 relates to a fuel injection valve for internal combustion engines. It is disclosed a fuel injection valve having at least two valve body parts, which rest against each other on a contact surface and are clamped by a clamping device against each other perpendicular to the contact surface. In both valve body parts, an inlet channel for fuel is formed, which passes through the contact surfaces and the high fuel pressure prevails. In the inlet channel there is at least one radial extension close to the contact surface of the relevant valve body part, so that this radial expansion experiences an expansion in the axial direction of the inlet channel due to the fuel pressure in the inlet channel.
• the area of the contact surface surrounding the passage of the inlet channel is pressed against the contact surface of the adjoining valve body part, so that the contact pressure of the contact surfaces increases.
• the passage of the inlet channel is thus better sealed and it can be correspondingly reduced the force of the clamping device.
• the pressurized medium is usually enclosed in a closed pressure chamber in an annular pressure chamber.
• This chamber is bounded on one side by a guide and on the other side by a sealing seat, wherein guide and sealing seat have exactly the same diameter d.
• Valves are known from the prior art, which are also used in injection valves for internal combustion engines. Especially with injection valves that are used in the automotive sector, fast-switching valves are required, which means that the Ventilhubweg must be traversed very quickly. Thus, such valves close at speeds of 0.5 to 1 m / s. If a valve member hits on the valve seat or a stroke stop in such a valve, mechanical vibrations in the valve are excited and the valve can bounce, which means that the valve is initially closed, but reopens after contact of the valve seat with the valve member and, for example, go through a ballistic phase of operation. Since the injection valve is not closed immediately, this can cause inaccuracies in the injection process. Similarly, in the subsequent control of the injection valve - for example in the case of a pre-and a main injection tion - the movement sequence are disturbed in such a way that this can be seen in a quantity deviation of the injection quantity.
• an injection valve in which the reproducible injection quantity accuracies from pilot injection phase to main injection phase to subsequent pilot injection phase are considerably increased compared with the fuel injectors known from the prior art.
• the closing speed is considerably increased, as a result of which the achievable injection quality is considerably improved.
• a favorable ratio of the natural frequencies to one another is the factor 2. This means that one of the armatures should, for example, be four times as heavy as another or the coupling of this armature wing should be four times as soft Depending on whether the realization of the mass or the rigidity takes place. Of course, combinations of stiffness and mass differences can be realized.
• FIG. 2 shows the comparison of the movement of an anchor bolt and an armature wing received thereon
• FIG. 3 shows the plan view of a first embodiment variant of the armature assembly proposed according to the invention with a first cross section and a second cross section through the armature
• FIG. 4 shows a plan view of a further embodiment variant of the armature assembly proposed according to the invention
• FIG. 5 is a plan view of a direction of rotation of the anchor bolt weakened armature assembly
• FIG. 6 shows a further embodiment of flexurally rigid or bend-soft coupled armature wings
• FIG. 7 shows an embodiment of flexurally rigid and flexibly coupled armature blades with slot pairs
• Figure 8 shows the embodiment of a rigid or flexible coupling of vanes by material weakening by means of holes and
• FIG. 9 shows a further embodiment of two armature wings of an anchor bolt which are connected softly with respect to the rotation.
• an injection valve 10 has a valve guide 12 arranged essentially in the valve body.
• the valve guide 12 is fixed on a plan side 32 by a valve clamping nut 24, which is only indicated here, and received stationary in the valve body of the injection valve 10.
• the injection valve 10 comprises the valve guide 12, whose lateral surface is identified by reference numeral 14. At this a sleeve-shaped here valve member 16 is guided movably in the vertical direction.
• the valve member 16 comprises an anchor bolt and an anchor plate 20, which in turn has individual armature wings 22.
• the closing direction, in which the here sleeve-shaped valve member 16 is moved to close a seat 30 is indicated by reference numeral 26.
• the seat 30 is formed at the transition from the plan side 32 of the valve guide 12 in the guide portion for vertical guidance of the anchor bolt 18.
• a seat is closed by the sleeve-shaped valve member 16 moved in the closing direction 26, indicated by reference numeral 34.
• FIG. 1.1 shows that the anchor bolt 18 with armature wings 22 formed thereon moves towards the seat 30 and closes it when it hits the seat 30.
• Figure 1.2 shows the movement of the armature assembly after impact of the anchor bolt 18 in the seat 30 and its closing.
• the lower end face of the anchor bolt 18 does not move further, as this rests against the seat surface of the seat 30.
• the at least one at the opposite end of the anchor bolt 18 performs formed valve vane 22 from a downward movement, from which a deflection 36 down the at least one armature blade 22 on the anchor bolt 18 results.
• FIG. 1.3 shows that the deflection 36, indicated in FIG. 1.2, transitions upward, at the bottom of the at least one anchor blade 22 on the anchor bolt 18, into a deflection 38, which has a winding force 40, ie. H. a force acting in the axial direction of the sleeve-shaped valve member 16 opening force causes.
• a winding force 40 ie. H. a force acting in the axial direction of the sleeve-shaped valve member 16 opening force causes.
• FIG. 2 shows the movements of the at least one anchor wing and of the anchor bolt.
• a first here indicated by reference numeral 1.1 section move the at least one anchor bolt 22 and the anchor bolt 18 of the armature assembly of the injection valve 10 synchronously in the direction of the seat 30.
• Figure 2 shows that a movement sequence 50 of the at least one armature blade 22 and a Motion sequence 60 of the anchor bolt 18 are synchronous.
• armature vanes 22 extending symmetrically to one another are formed on the armature plate 20, which has a central bore 72 and whose plan side is identified by reference numeral 70.
• the armature vanes 22 are separated from each other by slits 74.
• Two mutually opposite armature vanes 22 form an armature wing pair, wherein one of the armature arm pairs has a rigid coupling 76 on the armature bolt 18 and the remaining further armature arm pair of the armature arm 22 has a flexurally soft coupling 78 on the armature bolt 18.
• the details relating to the rigid coupling 76 are apparent from the section B-B, while the details of the flexible coupling 78 of the armature blades 22 on the anchor bolt 18 emerge from the sectional profile according to A-A. From this sectional profile, it can be seen that in the region of the flexible coupling 78 of the armature blade 22 a targeted weakening of the material of the armature bolt 18 in the region of the armature vanes 22 is formed, while in the case of the rigid coupling 76 of the armature vanes 22 this is formed on the armature bolt 18 of a material accumulation is, which finally allows the rigid coupling 76 of the armature blade 22 to the anchor bolt 18 only.
• section BB shows that the attached to the anchor bolt 18 of the armature assembly, opposing armature blades 22 are connected by a rigid coupling 76 with the anchor bolt 18, resulting from the accumulation of material at the transition from the lateral surface 18 of the anchor bolt to the armature blades 22 ,
• FIG. 4 shows an anchor plate 20, which represents a base group 80 from which anchor assemblies proposed according to the invention, comprising the anchor plate 20 and the anchor bolt 18, can be designed.
• the plan side 70 of the anchor plate 20 is divided by a slit 74 in four vanes 22.
• the armature wings 22, which are separated from each other by a slot 74, are in pairs opposite each other.
• the coupling points of the armature vanes 22 on the armature bolts 18 in the region of the central bore 72 are all configured as rigid couplings.
• Reference numeral 82 denotes a rotation axis with respect to the bend of the armature blade 22.
• FIG. 6 shows a further embodiment variant of flexurally soft and rigid coupling of armature blades of an armature plate to the armature bolt of an armature assembly.
• the plane side 70 of the anchor plate 20 is subdivided into four armature vanes 22 which are each oriented at right angles to one another with respect to the central bore 72.
• two opposing armature wings 22 form an armature wing pair.
• two opposing armature blades 22 are coupled via the rigid coupling 76 with the anchor bolt which extends in the plane parallel to the central bore 72, while the two of these armature blades 22 offset by 90 ° the armature wing 22nd are coupled via the flexurally soft coupling 78 with the anchor bolt 18 extending perpendicular to the drawing plane according to FIG.
• FIG. 7 shows a further embodiment of an armature plate of an armature assembly in which different natural frequencies are realized.
• the plan side 70 of the armature plate 22 is divided into a number of armature blades 22, in the present example four armature blades 22.
• two opposing armature vanes are coupled via a first pair of slots 88 and a second pair of slots 90 to the core region of the planar side 70 of the armature plate 20.
• the first pair of slots 88 and the second pair of slots 90 represents a targeted weakening of the coupling of the two opposing armature wings 22.
• the two offset by 90 ° to each other arranged armature vanes 22 are coupled via the rigid coupling 76 with the core region of the armature plate 20.
• FIG. 8 shows a further embodiment of the design of the plan side of the armature plate 20 of the armature assembly.
• the planar side 70 of the anchor plate 20 is subdivided into four armature wings 22 via a quadruple slit 74.
• a flexurally soft coupling 78 of two opposing armature vanes 22 is achieved by introducing a first weakening bore 92 or a second weakening bore 94 into the plane side 70 of the armature plate 20.
• the two offset by 90 ° to the armature blade 22 oriented armature wings 22 without weakening holes 92 and 94 are coupled via a rigid coupling 76 with the core region of the armature plate 20.
• the embodiment according to FIG. 9 represents a variation of the embodiment according to FIG. 8, in which two armature vanes 22 of the armature plate 20 each have weakening bores 96 and 98 with respect to rotation in the region of their coupling points to the core region of the armature plate 20.
• the introduced in Figure 9 in the anchor plate material attenuation holes 96, 98 are mounted off-center. As a result, rotational degrees of freedom are excited.
• rotational degrees of freedom can be stimulated by which relatively different natural frequencies in the armature blades 22 can be constructed.
• the plan side 70 of the armature plate of the armature assembly is divided into an even number of armature vanes 22, which is realized in a particularly simple manufacturing technology by the slot 74, which is preferably a quadruple slot can be.
• the plan side 70 of the anchor plate 20 with a triple slot, which is not shown in the drawing, and in this way the plan page 70 of the anchor plate 20 in 3 by 120 ° -Anordung to each other lying armature wings 22 to divide.
• an opposite movement of at least two wing wings also possible with this embodiment, without departing from the scope of the present invention.
• the moments of inertia j of the respective armature vanes 22 are designed differently so that different resonant frequencies of in each case two armature vanes 22 can be realized.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Fuel-Injection Apparatus (AREA)
• Valve Device For Special Equipments (AREA)
• Magnetically Actuated Valves (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=39410278

Family Applications (1)

Country Status (5)

Families Citing this family (3)

Family Cites Families (6)

• 2007
  • 2007-04-04 DE DE102007016252A patent/DE102007016252A1/de not_active Withdrawn
• 2008
  • 2008-02-04 AT AT08708642T patent/ATE489553T1/de active
  • 2008-02-04 CN CN2008800110127A patent/CN101802385B/zh not_active Expired - Fee Related
  • 2008-02-04 DE DE502008001902T patent/DE502008001902D1/de active Active
  • 2008-02-04 EP EP08708642A patent/EP2145100B1/fr not_active Not-in-force
  • 2008-02-04 WO PCT/EP2008/051338 patent/WO2008122452A1/fr not_active Ceased

Non-Patent Citations (1)

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