EP0446201B1 - Injecteur pour moteurs a combustion interne - Google Patents

Injecteur pour moteurs a combustion interne Download PDF

Info

Publication number
EP0446201B1
EP0446201B1 EP89905052A EP89905052A EP0446201B1 EP 0446201 B1 EP0446201 B1 EP 0446201B1 EP 89905052 A EP89905052 A EP 89905052A EP 89905052 A EP89905052 A EP 89905052A EP 0446201 B1 EP0446201 B1 EP 0446201B1
Authority
EP
European Patent Office
Prior art keywords
coil
injection nozzle
holder
short
nozzle according
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.)
Expired - Lifetime
Application number
EP89905052A
Other languages
German (de)
English (en)
Other versions
EP0446201A1 (fr
Inventor
Karl Hofmann
Roland Zucker
Bernhard Kaczynski
Ursula Schoedel
Alfred Knauer
Ulrich Lessing
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AT89905052T priority Critical patent/ATE79160T1/de
Publication of EP0446201A1 publication Critical patent/EP0446201A1/fr
Application granted granted Critical
Publication of EP0446201B1 publication Critical patent/EP0446201B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • 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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to a fuel injection nozzle according to the preamble of the main claim.
  • the chamber receiving the closing spring in the nozzle holder is connected to a leakage oil connection via a channel which is passed through the magnet armature, the coil core in the induction coil, the wire guide body and the installation channel of the needle movement sensor.
  • the coil winding of the induction coil is not sealed against the leakage oil passage, so that the coil winding must be made resistant to the fuel.
  • the coil core on the side facing away from the closing spring is extended beyond the connection points of the coil winding with the connecting wires and the yoke body is also pulled axially over these connection points.
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage that the coil winding of the induction coil is properly sealed with respect to the chamber accommodating the closing spring in the nozzle holder, without requiring more space in the axial direction of the injection nozzle than in the known arrangement.
  • the additional space required for accommodating the two sealing rings is saved again in that the coil core is also moved into this space and therefore the needle movement sensor in the area of the connection points of the coil winding with the connecting wires can be designed without obstruction by the coil core.
  • a particularly compact design is obtained if the coil body is provided with an annular collar which projects into the elongated section of the chamber in the yoke body and bears tightly against the protruding end of the coil core and carries the sealing ring.
  • the installation channel for the needle movement sensor can be designed with a particularly small diameter and without an enlarged diameter overlap to the bore of the nozzle holder receiving the return body, if the bore intended for receiving the wire guide body in the coil former with its lateral recesses receiving the connection points with the coil winding is connected via channels, the openings of which lie closer together in the receiving bore than the openings of which open into the recesses.
  • a particularly dense and durable design results if the induction coil is fixed in its mounting hole in the rear-firing body by an injected plastic, preferably silicone, without gaps and shake-proof, which preferably also fills the cavities in the area of the electrical connections in wire guide bodies without gaps.
  • an injected plastic preferably silicone
  • the production can be simplified and the space available for a leak oil hole and a filter hole in the nozzle holder can be expanded if, according to a further proposal of the invention, the end sections of the two connecting wires of the induction coil which protrude from the wire guide body are led out of the nozzle holder next to one another in an isolated insulating plug.
  • a secure connection of the internal connection wires with the individual wires of a connection cable is obtained if the insulating plug carries two metallic solder sleeves to which both the internal connection wires and the individual wires of the connection cable are soldered.
  • a good anchoring of the individual wires of the connection cable on the nozzle holder and a safe strain relief of the electrical connections result if, according to the invention, the end sections of the individual wires of the connection cable are guided through grooves in the jacket region of the nozzle holder and are fixed in them by subsequent deformation of at least one groove wall area.
  • all of the depressions provided for receiving the electrical connecting means in the jacket region of the nozzle holder are injection-molded with plastic, which fixes the parts on the nozzle holder without gaps and insulates and protects them from the outside.
  • the plastic can form a sleeve surrounding the nozzle holder, which has the same outer diameter as the nozzle holder and also encompasses the end region of the connecting cable so as to hold and give direction.
  • FIG. 1 shows an injection nozzle according to the first exemplary embodiment, partly in a side view and partly in a longitudinal section
  • FIG. 2 shows a longitudinal section, enlarged compared to FIG. 1, through the needle displacement sensor of the injection nozzle along the line II-II in FIG. 1
  • FIG. 3 shows the coil former of the injection nozzle according to FIG. 1 in side view and partly in section
  • FIG. 4 is a plan view of the coil former
  • FIG. 5 shows the coil former in a side view rotated by 90 ° with respect to FIG. 3 and partly in section (line VV in FIG. 3, FIG.
  • FIG. 6 shows a section along the line VI-VI in Figure 5
  • Figure 7 seen the wire guide body of the injection nozzle according to Figure 1 in longitudinal section
  • Figure 8 is an end view of the wire guide body in the direction of arrow A in Figure 7.
  • Figure 9 shows a longitudinal section through an injection nozzle according to the second embodiment
  • Fig. 10 the detail "X" of Figure 9 on an enlarged scale
  • Fig. 11 shows a section na On the line XI-XI in FIG. 9 and FIG. 12, a section along the line XII-XII in FIG. 11.
  • nozzle 1 has a nozzle holder 10 against which an intermediate plate 12 and a nozzle body 14 are clamped by a union nut 16.
  • a valve needle 18 is slidably mounted, on which a closing spring 22 acts via a pressure piece 20 and is accommodated in a spring chamber 21 of the nozzle holder 10.
  • the closing spring 22 is supported on the nozzle holder 10 via a magnetically conductive yoke body 25, the construction and double function of which is described below in more detail.
  • the valve needle 18 cooperates with an inward-facing valve seat in the nozzle body 14 and executes its opening stroke against the direction of flow of the fuel.
  • the guide bore of the valve needle 18 is, as usual, expanded at one point to a pressure chamber, in the area of which the valve needle 18 has a pressure shoulder facing the valve seat and which has a fuel via channels (not shown) in the nozzle body 14, in the intermediate disk 12 and in the nozzle holder 10.
  • Connection piece 26 of the nozzle holder 10 is connected.
  • the fuel pressure acting on the pressure shoulder of the valve needle 18 pushes the valve needle 18 upward against the force of the closing spring 22 until an invisible shoulder on the valve needle 18 abuts the lower end face of the intermediate disk 12 and limits the further upward stroke of the valve needle 14.
  • a needle movement sensor designated as a whole by reference number 28, is installed in the nozzle holder 10 and can be connected to an evaluation circuit of a control device for the fuel supply or a test device.
  • the needle motion sensor 28 consists of an induction coil 30 with coil winding 32 and coil body 34, a coil core 36, a bolt-shaped magnet armature 38, the yoke body 25 serving as a supporting body for the closing spring 22 and two connecting wires 40, 42 which are passed through a wire guide body 44.
  • the parts of the needle displacement sensor 28 are described in more detail below.
  • the coil former 34 is designed as a plastic injection-molded part, into which the coil core 36 consisting of soft iron is molded.
  • the coil former 34 has two ring flanges 46, 48 which delimit a first cylindrical section 50 which carries the coil winding 32.
  • At the bottom of the ring flange 46 there is an annular collar 52 with a thickened collar edge 54, which in the installed state is covered by a sealing ring 56.
  • the coil core 36 is provided with an end section 58 which projects beyond the ring flange 46 and is tightly enclosed by the ring collar 52 and which has a conical blind bore 60 into which a correspondingly conical end section of the bolt-shaped magnet armature 38 is immersed.
  • a clamping flange 62 is integrally formed on the coil core 36 and is divided into two segments 66 by two diametrically opposite radial cutouts 64.
  • the clamping flange 62 has a larger outer diameter than the ring flanges 46, 48 of the coil body 34, which is formed through the recesses 64 of the clamping flange 62 with two webs 68 and continues above the clamping flange 62 as a cylindrical body in its basic shape.
  • This body has two segment-shaped recesses 70 which are arranged in such a way that an annular region 72 with the diameter D covering the clamping flange 62 and a section 74 which is approximately rectangular in cross section is formed with parallel side surfaces 76.
  • An oblique groove 78 is formed in each of the webs 68, through which a connection end of the coil winding 32 passes and into the corresponding recess 70.
  • the coil former 34 again forms a fully cylindrical ring section 80 with the diameter D, which merges at a conical ring surface 82 into a cylindrical section 84 with the smaller diameter d.
  • Four sections 86 are formed on the section 84, the lateral surfaces of which extend parallel to the axis of the coil former 34 and lie on an imaginary cylinder with the diameter D.
  • the upper sections of the strips 86 are slightly stepped inwards at 88 and merge into the upper end face 92 of the coil former 34 on an inclined surface 90.
  • the cylindrical section 84 of the coil former 34 is provided with a blind bore 94 extending from its upper end face 92, which is delimited at the bottom by a flat bottom surface 96. From the side, two diametrically opposite wall openings 98 open into the blind bore 94, above which the blind bore 94 is provided with longitudinal groove-like wall recesses 100. A projection 102 protrudes from the bottom surface 96 into the center of the blind bore 94 and from this two channels 104 lead into the lateral recesses 70, which each narrow down like a funnel to a circular bore 106.
  • the induction coil 30 is inserted into a chamber of the yoke body 25, which has a downwardly elongated section 107, which receives the ring collar 52 formed on the bobbin 34 and the sealing ring 56 seated thereon, and to which a guide bore for the bolt-shaped magnet armature 38 connects at the bottom .
  • the coil winding 32 is against the annular gap between the magnet armature 38 and the guide bore in the yoke body 25 through the sealing ring 56 sealed, which is firmly clamped between the bore wall of the elongated portion 107 of the chamber and the annular collar 52 of the bobbin 34.
  • the magnet armature 38 is connected via a rod part 110 (FIG.
  • the yoke body 25 has a sealing ring 112 on its circumference, which seals the annular gap between the yoke body 25 and the wall of the bore 114 in the nozzle holder 10 receiving it.
  • the short-circuit body 25 lies with the interposition of the clamping flange 62 formed on the coil core 36 on an annular shoulder 116 of the nozzle holder 10, at which the bore 114 merges into the inner central section 118 of an installation duct 120, into which two oblique bores 122 lead from the outside.
  • an air gap is formed in the magnetic circuit of the induction coil 30, the size of which changes with the stroke of the valve needle 18.
  • the magnetic circuit is closed in a relatively short way compared to the known arrangement.
  • the coil former 34 protrudes into the central section 118 of the installation channel 120.
  • the lead wires 40, 42 are connected in the region of the lateral recesses 44 in the coil former 34 to the connection ends of the coil winding 32, which, inserted into the slots 78 of the coil former 34, are passed through the recesses 64 of the clamping flange 62.
  • connection ends of the coil winding 32 can be provided with an excess length for the purpose of additional strain relief or to facilitate connection, which forms a loop or the like in the cutouts 70.
  • the actual strain relief is achieved in that the connecting wires 40, 42 are firmly anchored in the wire guide body 44 and this is locked in place with the coil body 34.
  • the wire guide body 44 is provided with two axial bores 124, in which the connecting wires 40, 42 which are passed through are glued or held in some other way, e.g. B. are pressed or molded.
  • the bores 124 are arranged in a cylindrical section 126 of the wire guide body 44, the diameter of which corresponds to that of the blind bore 90 in the coil body 34 and on which two diametrically opposed locking lugs 128 are formed, which are inserted into the side wall openings when the wire guide body 44 is inserted into the coil body 34 98 click into place.
  • the cylindrical section 126 is provided with a central depression 130 for the suitable accommodation of the projection 102 on the coil former 34.
  • the cylindrical section 126 is adjoined by an approach 132 which is approximately rectangular in cross section and which fits between the two connecting wires 40, 42 and holds them apart in an insulating manner.
  • the connecting wires 40, 42 are surrounded by insulated sleeves 134 which are plugged on and pressed into the bores 122 or, if appropriate, glued in, and which reach inside close to the upper end of the wire guide body 44.
  • the spring chamber 24 of the nozzle holder 10 is connected to a leakage oil channel (not visible in the drawing) which bypasses the badel movement sensor 28 laterally and leads into a leakage oil connection 136 fastened to the nozzle holder 10.
  • the bare connecting wires 40, 42 are expediently first passed through the holes 124 in the wire guide body 44 over the prescribed length and fixed in the holes 124. So then the wire guide body 44 with the connecting wires 40, 42 is brought up to the coil body 34 in such a way that the connecting wires 40, 42 enter the channels 104 of the coil body 34.
  • the wire guide body 44 is inserted into the blind bore 94 of the coil body 34, the free ends of the connecting wires 40, 42 are spread apart and directed into the lateral recesses 70 of the coil body 34.
  • the connecting wires 40, 42 get a kink at the output of the wire guide body 44, which results in an additional strain relief effect.
  • the wire ends are relieved of strain on the coil body 34, after which they can be soldered to the connection ends of the coil winding 32.
  • the assembly thus prefabricated is now inserted into the yoke body 25 and inserted together with it from the side of the spring chamber 24 into the nozzle holder 10, the coil body 34 fittingly entering the central section 118 of the installation channel 120 and the connecting wires 40, 42 automatically in find the holes 122 leading to the outside. Then the insulating sleeves 134 are plugged on and fixed in the bores 122.
  • the insulating sleeves 134 themselves have no sealing function, because this is already carried out by the sealing rings 56, 112 and the leakage oil channel bypasses the needle movement sensor 28.
  • the coil body 34 could also be provided with individual knobs or the like on the circumference, which do not make it more difficult to insert it into the installation channel 120, but additionally tension the inserted coil body 34 radially, and thereby the latching connection between it and the wire guide body 44 stiffen.
  • nozzle 9 has essentially the same housing structure as the previously described embodiment, namely a nozzle holder 210 against which an intermediate plate 212 and a nozzle body 210 are clamped by a union nut 216.
  • a valve needle 218 is slidably mounted in the nozzle body 210, but is acted upon by two closing springs 220 and 222 in the manner described below.
  • a needle movement sensor 228 built into the nozzle holder 210 also corresponds to the above-described embodiment with regard to the formation of an induction coil 230 and a wire guide body 244.
  • the induction coil 230 is seated in a yoke body 232 which, in contrast to the embodiment according to FIG. 2, is provided with a sleeve-shaped extension 234 which encloses the one closing spring 220 and extends up to a support disk 236 for the second closing spring 222.
  • the sleeve-shaped extension 234 could also be formed by a component arranged in addition to the yoke body, so that the yoke body can be designed identically to that of the first exemplary embodiment.
  • the first closing spring 220 is supported on the yoke body 232 on the inside and engages the valve needle 218 via a pressure piece 238 and a pressure pin 240.
  • the pressure pin 240 is slidably guided in the support plate 236 and in a bush 242, which in turn is slidably mounted in the intermediate plate 212.
  • the second closing spring 222 presses the bush 242 against the upper end face of the nozzle body 214 at the bottom via a pressure piece 245 and holds the return body 232 together with the induction coil 230 against the housing shoulder 246 of the nozzle holder 210 via the support disk 236.
  • the upper closing spring 220 first acts solely on the valve needle 218 until it hits a lower stroke h 1 against the lower end face of the bush 242. Thereafter, the opening pressure of the fuel must also overcome the closing spring 222 until after a further partial stroke h2 the sleeve 202 abuts a shoulder in the stepped guide bore in the intermediate plate 212.
  • This graduated closing force curve means that pre-injection and main injection are clearly separated in various operating areas.
  • An anchor bolt 247 which is guided in the yoke body 232, is connected in one piece to the pressure piece 238 and dips into the induction coil 230 and generates the desired signals through its movements.
  • a transverse bore 250 is provided in the nozzle holder 210, which leads via a corresponding transverse bore in the yoke body 232 into the receiving chamber for the induction coil 230.
  • silicone is injected into these annular holes between the induction coil 230 and the chamber wall, thereby fixing the induction coil 230 without gaps and without shaking.
  • the Silicone also passes from the annular gap into the cavities of the wire guide body 244 receiving the coil connections (for details see FIGS. 3 to 8) and also fills them without gaps.
  • the transverse bore 250 is sealed off from the outside by a pressed-in ball 252.
  • the injection nozzle according to FIG. 9 also differs from the first exemplary embodiment by a different design of the wire guide upstream of the wire guide body 244 and by a different cable connection.
  • the two connecting wires 254, 256 are not diametrically opposed, but are guided out of the nozzle holder 210 on one side in an insulating plug 258 in an insulated manner. This creates more space for a leak oil hole and a hole for a filter body 260 in the fuel channel and the external cable connection can also be made more easily, secured and covered to the outside. Furthermore, only one hole has to be provided in the nozzle holder 210 for the passage of the connecting wires 254, 256.
  • soldering sleeves 262 are placed next to one another, into which the ends of the connecting wires 254, 256 protruding from the insulating plugs 258 are soldered.
  • the insulating plug 258 is furthermore provided with an upwardly projecting, metallic contact of the soldering sleeves 262 with the nozzle holder 210 preventing insulating wall 264, and with an insulating web which engages between the soldering sleeves 262 and cannot be seen in the drawing.
  • the insulating plug 258 also has a conical section 266 which, by the measures described below, is pressed tightly against a correspondingly conical section of the bore in the nozzle holder 210 receiving the insulating plug 258.
  • An electrical connection cable 270 contains two individual wires 272, 274, one above the other, provided with an insulating sheath, which, according to FIG. 11, are looped around the nozzle holder 210 to the soldering sleeves 262.
  • Each individual wire 272, 274 is passed through an axially accessible groove 276, 278 which extends over part of the circumference of the casing of the nozzle holder 210 in a recessed casing area of the nozzle holder 210 and is fixed in the groove by flanging the outer groove wall 280.
  • the bare ends of the individual wires 272, 274 are soldered into the soldering sleeves 262.
  • a plastic overmolding 282 applied in a last operation encircles the nozzle holder 210 and the adjacent end region of the connecting cable 270 in a cuff-like manner such that the end region is held at right angles to the nozzle axis.
  • the plastic encapsulation 282 forms an additional fixation of the individual wires 272, 274 and also fills the cavities formed between the parts in the recess 261 of the nozzle holder 210 without any gaps, the insulating plug 258 also being pressed tightly into its installation bore by the injection pressure.
  • an annular groove 284 is provided which surrounds the insulating plug 258 with a small radial distance. The plastic penetrating into the annular groove 284 during the encapsulation shrinks on cooling and thus exerts an additional radial sealing force on the insulating plug 258.

Landscapes

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

Abstract

Un injecteur muni d'un détecteur à induction à aiguille mobile (28) doit être réalisé de façon que l'enroulement de la bobine (32) soit rendu rigoureusement étanche vis-à-vis de l'huile provenant d'une fuite, sans que cela nécessite plus de place pour le détecteur à aiguille mobile (28) qu'en l'absence de moyens d'étanchéité à l'huile de fuite pour ledit enroulement (32). Dans ce but, le noyau (36) de la bobine d'induction (30) est prolongé à l'intérieur, dans une extension (107) de la chambre logeant la bobine d'induction (30), dans la pièce de fermeture arrière (25), cette chambre renfermant un joint (56) assurant l'étanchéité de l'enroulement (32) vis-à-vis de la gorge de guidage de l'armature de l'aimant (38) dans ladite pièce de fermeture arrière (25). En outre, un joint (112) assure l'étanchéité de l'espace annulaire compris entre la pièce de fermeture arrière (25) et la paroi de l'alésage logeant cette dernière dans le support d'injecteur (10). La bride de serrage (62) reliée au noyau (36) est appliquée directement sur la bride annulaire voisine (48) de l'armature de la bobine (34), l'enroulement (32) étant en contact au-delà de la bride de serrage (62) avec les fils de connexion (40, 42). Le domaine d'application préféré comprend les injecteurs pour moteurs diesel.

Claims (16)

1. Injecteur de carburant pour moteurs à combustion interne, avec un corps de buse (14) dans lequel est prévu un siège de soupape et est guidé, de façon à pouvoir coulisser, un pointeau de soupape (18), qui est sollicité par un ressort de fermeture (22) et en opposition à celui-ci par la pression du carburant, et qui, lors de sa course d'ouverture, se déplace en sens inverse de l'écoulement du carburant, et en outre, avec un porte-injecteur (10), dans lequel est logée une bobine d'induction (30), munie d'un noyau de bobine (36), d'un détecteur de déplacement du pointeau (28) et un corps magnétique de terminaison arrière (25) entourant la bobine d'induction (30), dans lequel est guidée une armature magnétique (38) déplacée par le pointeau de soupape (18), tandis que ce corps de terminaison arrière (25) est maintenu en étant appliqué sous pression par le ressort de fermeture (22) et par l'intermédiaire d'une bride de fixation (62) reliée au noyau de la bobine (36), contre un épaulement (116) dans le porte-injecteur (10), épaulement (116) dont l'alésage (114) du porte-injecteur (10) dans lequel est logé le corps de terminaison arrière (25) se transforme en un tronçon central (118) co-axial à la bobine d'induction (30) d'un canal d'installation (120) allant vers l'extérieur, et dans lequel est inséré un corps de guidage des fils (44) qui en coopérant avec le corps de bobine (34) portant l'enroulement de bobine (32), procure un soulagement à la traction pour les raccordements (40, 42) de l'enroulement de bobine (32), et qui peut être mis en place dans le porte-injecteur en commun avec le corps de terminaison arrière (25), la bobine d'induction (30) et les fils de raccordement (40, 42), injecteur de carburant caractérisé en ce que:
a) l'interstice annulaire entre le corps de terminaison arrière (25) et la paroi de l'alésage (114) recevant le corps de terminaison arrière (25) dans le porte-injecteur (10) est étanché par une bague d'étanchéité (112) qui est placée de préférence dans une gorge annulaire à la périphérie de la partie du corps de terminaison arrière (25) guidant l'armature magnétique (38),
b) le noyau (36) de la bobine d'induction (30) fait quelque peu saillie au-delà de la face frontale de l'enroulement de bobine (32) tournée vers le ressort de fermeture (22),
c) la chambre recevant la bobine d'induction (30) dans le corps de terminaison arrière (25) est prolongée vers l'extérieur au-delà de la face frontale de l'enroulement de bobine (32) tournée vers le ressort de fermeture (22),
d) dans la partie prolongée (107) de la chambre du corps de terminaison arrière (25) recevant la bobine d'induction (30), est mise en place une bague d'étanchéité (56) qui étanche la bobine d'induction (30) par rapport à l'interstice de guidage de l'armature magnétique (38) dans le corps de terminaison arrière (25), et
e) une chambre (24) recevant le ressort de fermeture (22) dans le porte-injecteur (10) et dans laquelle débouche l'alésage (114) dans lequel est logé le détecteur de déplacement du pointeau (28), est reliée avec un raccordement d'huile de fuite (136) par l'intermédiaire d'un canal contournant latéralement le détecteur de déplacement du pointeau (28) dans le porte-injecteur (10).
2. Injecteur selon la revendication 1, caractérisé en ce que le corps de bobine (34) est muni d'un collet annulaire (52) s'étendant à l'intérieur de la partie prolongée (107) de la chambre dans le corps de terminaison arrière (25), et s'appliquant de façon étanche contre l'extrémité en saillie du noyau de bobine (36), ce collet portant la bague d'étanchéité (56).
3. Injecteur selon la revendication 1 ou la revendication 2, caractérisé en ce que la bride de fixation (62) reliée au noyau de bobine (36) s'applique directement contre une collerette annulaire (48) du corps de bobine (34) recouvrant la face frontale voisine de l'enroulement de bobine (32), et en ce que les deux extrémités de raccordement de l'enroulement de bobine (32) passent à travers des évidements (64) dans la bride de fixation (62) et sont reliées aux fils de raccordement (40, 42) à l'intérieur d'évidements latéraux (70) dans un appendice du corps de bobine (34) s'étendant dans la partie centrale (118) du canal d'installation (120).
4. Injecteur selon l'une des précédentes revendications, caractérisé en ce que le corps de guidage des fils (44) est encliqueté dans le corps de bobine (34).
5. Injecteur selon la revendication 4, caractérisé en ce que le corps de guidage des fils (44) est encliqueté dans un alésage récepteur (94) du corps de bobine (34).
6. Injecteur selon la revendication 5, caractérisé en ce que l'alésage récepteur (94) dans le corps de bobine (34) est relié avec les évidements latéraux (70) de celui-ci par l'intermédiaire de canaux (104) dont les débouchés dans l'alésage récepteur (94) sont plus rapprochés les uns des autres que leurs débouchés dans les évidements (70).
7. Injecteur selon une des revendications 4 à 6, caractérisé en ce que les fils de raccordement (40, 42) sont fermement ancrés dans des perçages (124) du corps de guidage des fils (44).
8. Injecteur selon une des précédentes revendications, caractérisé en ce que la bobine d'induction (230) est fixée sans interstice et en étant protégée contre les secousses, dans un alésage de montage dans le corps de terminaison arrière (232) par de la matière plastique injectée, de préférence du silicone.
9. Injecteur selon la revendication 8, caractérisé en ce que la matière plastique injectée remplit également sans interstice les espaces creux dans la zone des raccordements électriques dans le corps de guidage des fils (244).
10. Injecteur selon une des précédentes revendications, caractérisé en ce que les parties d'extrémités des deux fils de raccordement (254, 256) sortant du corps de guidage des fils (244) sont guidées en dehors du porte-injecteur (210) en étant placées isolément l'un à côté de l'autre, dans un bouchon isolant unique (258).
11. Injecteur selon la revendication 10, caractérisé en ce que le bouchon isolant (258) porte deux manchons métalliques de soudage (262) sur lesquels sont soudés aussi bien les fils de raccordement interne (254, 256) qu'également les fils individuels (272, 274) d'un câble de raccordement externe (270).
12. Injecteur selon la revendication 11, caractérisé en ce que les parties d'extrémités des fils individuels (272, 274) du câble de raccordement (270) sont guidées dans des gorges (276, 278) dans la zone d'enveloppe du porte-injecteur (210) et y sont fixées en déformant ultérieurement au moins une zone (280) de la paroi de la gorge.
13. Injecteur selon la revendication 11 ou la revendication 12, caractérisé en ce que les manchons de soudage (262) disposés dans un évidement (261) dans la zone enveloppe du porte-injecteur (210) sont pourvus d'un enrobage de matière plastique (282) fixant sans interstice les raccordements électriques et les recouvrant vers l'extérieur.
14. Injecteur selon les revendications 12 et 13, caractérisé en ce que l'enrobage en matière plastique (282) recouvre également à la façon d'une manchette et en outre, maintient, les parties terminales, entourant le porte-injecteur (210), des fils individuels (272, 274) du câble de raccordement (270).
15. Injecteur selon la revendication 14, caractérisé en ce que l'enrobage en matière plastique (282) remplit complètement les évidements prévus dans la zone enveloppe du porte-injecteur (210) pour le raccordement du câble électrique, et entoure également la zone terminale voisine du câble de raccordement (270) en le maintenant et en l'orientant.
16. Injecteur selon une des précédentes revendications dont le pointeau de soupape, pour obtenir une évolution de la pression d'ouverture échelonnée, est sollicité par deux ressorts de fermeture placés axialement l'un derrière l'autre, injecteur caractérisé en ce que le corps de terminaison arrière (232) du détecteur de déplacement du pointeau (228) est muni d'un appendice en forme de douille (234), ou bien s'applique entre l'appendice en forme de douille, qui entoure l'un des ressorts de fermeture (220), prenant appui contre le corps de terminaison arrière (232), et forme à son extrémité frontale se trouvant en aval, une surface d'appui pour le second ressort de fermeture (222).
EP89905052A 1988-11-30 1989-05-05 Injecteur pour moteurs a combustion interne Expired - Lifetime EP0446201B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89905052T ATE79160T1 (de) 1988-11-30 1989-05-05 Kraftstoff-einspritzduese fuer brennkraftmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3840339A DE3840339A1 (de) 1988-11-30 1988-11-30 Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3840339 1988-11-30

Publications (2)

Publication Number Publication Date
EP0446201A1 EP0446201A1 (fr) 1991-09-18
EP0446201B1 true EP0446201B1 (fr) 1992-08-05

Family

ID=6368162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89905052A Expired - Lifetime EP0446201B1 (fr) 1988-11-30 1989-05-05 Injecteur pour moteurs a combustion interne

Country Status (6)

Country Link
US (1) US5161742A (fr)
EP (1) EP0446201B1 (fr)
JP (1) JP2667269B2 (fr)
KR (1) KR960003697B1 (fr)
DE (2) DE3840339A1 (fr)
WO (1) WO1990006439A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005774A1 (de) * 1990-02-23 1991-08-29 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE4142996A1 (de) * 1991-12-24 1993-07-01 Bosch Gmbh Robert Verfahren zum messen der mechanischen bewegung eines magnetventilankers, insbesondere von elektrisch gesteuerten einspritzanlagen
AU728998B2 (en) 1996-07-08 2001-01-25 Corning Incorporated Rayleigh-breakup atomizing devices and methods of making rayleigh-breakup atomizing devices
AU729427B2 (en) 1996-07-08 2001-02-01 Corning Incorporated Gas-assisted atomizing device
US6352209B1 (en) 1996-07-08 2002-03-05 Corning Incorporated Gas assisted atomizing devices and methods of making gas-assisted atomizing devices
DE29810989U1 (de) * 1998-06-19 1999-11-04 Bosch Gmbh Robert Stromspule
TW200805838A (en) * 2006-07-05 2008-01-16 Ks Terminals Inc Wire connector and method of fabricating the same
JP4529971B2 (ja) 2006-12-21 2010-08-25 株式会社デンソー 燃料噴射弁
JP5120316B2 (ja) 2009-04-03 2013-01-16 株式会社デンソー 燃料噴射装置
DE102012208075A1 (de) * 2012-05-15 2013-11-21 Man Diesel & Turbo Se Injektor für eine Kraftstoffversorgungsanlage einer Brennkraftmaschine sowie Kraftstoffversorgungsanlage
DE102017217903A1 (de) 2017-10-09 2019-04-11 Robert Bosch Gmbh Kraftstoffinjektor mit Nadelbewegungssensor

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU964457A2 (ru) * 1978-09-06 1982-10-07 Предприятие П/Я Р-6194 Устройство дл измерени расхода топлива двигател внутреннего сгорани
DE3137761A1 (de) * 1981-09-23 1983-03-31 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3227989A1 (de) * 1982-07-27 1984-02-02 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3326840A1 (de) * 1983-07-26 1985-02-14 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
JPS6036772A (ja) * 1983-08-10 1985-02-25 Diesel Kiki Co Ltd 燃料噴射弁
DE3343269C1 (de) * 1983-11-30 1985-04-04 Daimler-Benz Ag, 7000 Stuttgart Vorrichtung zum indirekten beruehrungslosen elektrischen Messen kleiner Wege
US4573349A (en) * 1984-06-28 1986-03-04 International Harvester Company Needle position indicator for a fuel injection nozzle holder
DE3444451A1 (de) * 1984-12-06 1986-06-19 Vdo Adolf Schindling Ag, 6000 Frankfurt Elektromagnetisch betaetigbares kraftstoffeinspritzventil
DE3515264A1 (de) * 1985-04-27 1986-11-27 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
GB8516127D0 (en) * 1985-06-26 1985-07-31 Lucas Ind Plc Fuel injection nozzle
DE3724545A1 (de) * 1987-07-24 1989-02-02 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3914636A1 (de) * 1989-05-03 1990-11-08 Bosch Gmbh Robert Vorrichtung zum kombinierten ausblasen von kraftstoff und luft fuer kraftstoffeinspritzanlagen von brennkraftmaschinen

Also Published As

Publication number Publication date
US5161742A (en) 1992-11-10
DE58902006D1 (de) 1992-09-10
KR900702221A (ko) 1990-12-06
KR960003697B1 (ko) 1996-03-21
JPH04501896A (ja) 1992-04-02
DE3840339A1 (de) 1990-05-31
EP0446201A1 (fr) 1991-09-18
JP2667269B2 (ja) 1997-10-27
WO1990006439A1 (fr) 1990-06-14

Similar Documents

Publication Publication Date Title
DE19722720C2 (de) Kraftstoffinjektor mit vereinfachter Bauweise und vereinfachtem Zusammenbau
EP0922287B1 (fr) Procede de production d'une bobine magnetique destinee a une soupape, et soupape pourvue d'une bobine magnetique
EP0516632B1 (fr) Soupape a commande electromagnetique
EP0862689B1 (fr) Distributeur de carburant
DE3825134A1 (de) Elektromagnetisch betaetigbares ventil und verfahren zur herstellung
EP0446201B1 (fr) Injecteur pour moteurs a combustion interne
DE19641785A1 (de) Ventilnadel für ein Einspritzventil
DE3536352A1 (de) Magnetspule
EP1825135B1 (fr) Injecteur
DE19600378A1 (de) Brennstoffeinspritzsystem
EP0496844B1 (fr) Procede pour le reglage d'une soupape et soupape
EP0220197B1 (fr) Injecteur de carburant pour moteurs a combustion interne
DE19714812A1 (de) Magnetspule
DE3839692A1 (de) Anregungsspule fuer ein elektromagnetisches dosier- und zerstaeubungsventil fuer treibstoff an einer brennkraftmaschine
DE4318130A1 (de) Zündspule für Brennkraftmaschinen
EP0068339B1 (fr) Buse d'injection de carburant pour moteurs à combustion interne
EP0876552B1 (fr) Dispositif distributeur pour systemes d'injection de carburant
DE19827136A1 (de) Brennstoffeinspritzventil
DE3705587C2 (de) Elektromagnetisch betätigtes Ventil, insbesondere Kraftstoffeinspritzventil
DE10043883A1 (de) Ummantelung für ein Glühstiftmodul einer Zündspulenanordnung
DE4108416C2 (de) Kraftstoff-Einspritzdüse für Brennkraftmaschinen
DE19512339A1 (de) Elektromagnetisch betätigbares Brennstoffeinspritzventil
DE3925744C2 (de) Beschleunigungsdetektor
DE19853102A1 (de) Brennstoffeinspritzventil
DE3637350C2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19901205

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE FR GB IT LI SE

17Q First examination report despatched

Effective date: 19911121

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB IT LI SE

REF Corresponds to:

Ref document number: 79160

Country of ref document: AT

Date of ref document: 19920815

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 58902006

Country of ref document: DE

Date of ref document: 19920910

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 89905052.0

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030428

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030523

Year of fee payment: 15

Ref country code: AT

Payment date: 20030523

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030526

Year of fee payment: 15

Ref country code: CH

Payment date: 20030526

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030702

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040505

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040505

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040506

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041201

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040505

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050131

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050505