EP0715069B1 - Brennstoffdispersionblende für Einspritzdüse einer Einspritzbrennkraftmaschine - Google Patents

Brennstoffdispersionblende für Einspritzdüse einer Einspritzbrennkraftmaschine Download PDF

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Publication number
EP0715069B1
EP0715069B1 EP95402704A EP95402704A EP0715069B1 EP 0715069 B1 EP0715069 B1 EP 0715069B1 EP 95402704 A EP95402704 A EP 95402704A EP 95402704 A EP95402704 A EP 95402704A EP 0715069 B1 EP0715069 B1 EP 0715069B1
Authority
EP
European Patent Office
Prior art keywords
skirt
downstream
fuel
injector
ports
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
EP95402704A
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English (en)
French (fr)
Other versions
EP0715069A1 (de
Inventor
Michael Pontoppidan
Bruno Covin
Jean-Christophe Lucas
Christophe Preterre
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.)
Regie Nationale des Usines Renault
Marelli France SAS
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
Magneti Marelli France SAS
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.)
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Application filed by Renault SAS, Regie Nationale des Usines Renault, Magneti Marelli France SAS filed Critical Renault SAS
Publication of EP0715069A1 publication Critical patent/EP0715069A1/de
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Publication of EP0715069B1 publication Critical patent/EP0715069B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/108—Intake manifolds with primary and secondary intake passages
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/108—Intake manifolds with primary and secondary intake passages
    • F02M35/1085—Intake manifolds with primary and secondary intake passages the combustion chamber having multiple intake valves
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10327—Metals; Alloys
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10347—Moulding, casting or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Definitions

  • the invention relates to a skirt for dispersing the fuel it receives from a multi-jet injector, preferably twin jet, and which is transferred in two conduits air intake, separated from each other by a partition, for supplying an engine combustion chamber internal combustion fueled by injection, and in particular an engine having at least two valves intake by combustion chamber, the injector being arranged substantially between the air ducts and the skirt having a generally tubular shape and being arranged in the partition, downstream of the injector that it houses at least partially in its upstream part, having a form of preference of revolution, while at least its downstream part forms two fuel passages, in communication with one the other towards the inside of the skirt, opening each into one respectively of the two air ducts through an orifice outlet, and delimited between two opposite side walls of the skirt.
  • a multi-jet injector preferably twin jet
  • two conduits air intake separated from each other by a partition
  • the injector being arranged substantially between the air ducts and the skirt having a generally tubular shape and being arranged in the partition
  • EP-A-0 544 978 describes a skirt of this type, produced in the form of a part adapter mounted removable directly in the cylinder head engine, and more specifically in a housing provided for part in a partition and separation of two air ducts in the engine cylinder head.
  • This skirt has, at its downstream end, a central partition element, which integrates with the bulkhead formation and separation of air ducts in the cylinder head to extend it, when the removable skirt is put in place in the cylinder head, and this central partition element is pierced with a communication opening between air ducts, at the outlet of the passageways skirt fuel.
  • the object of the invention is to remedy these drawbacks, and in particular to offer a dispersion skirt fuel, usable as an active fuel diffuser from the injector, to ensure better preparation of the air-fuel mixture than that obtained with a skirt of the type described in EP-A-0 544 978.
  • Another object of the invention is to provide a skirt fuel dispersion better suited to various requirements of the practice than those known, and in particular which can be mounted on a manifold or manifold admission, moreover of classical structure.
  • the invention provides a skirt of dispersion of the type presented above, which is characterized by that at least near the outlet ports of the fuel passages, each of the opposite side walls of the skirt is gradually thinned into a thick bevel and / or width decreasing from upstream to downstream to its free downstream edge, in thin strip, and in which is provided a concave notch with concavity turned downstream.
  • the concave notches in the free edges in thin blades of the opposite walls of the skirt allow wrenching, by the energy contained in the flow air in adjacent conduits, fuel films from the edges of the bevels, so that an excellent preparation of the air-fuel mixture is ensured.
  • Concave openings with concavity facing the downstream are certainly presented by the skirt described in EP-A-0 544 978.
  • the concave openings are not practiced in the skirt only to clear access to the opening of communication in the partition element central, and to make sure that this skirt doesn't protrusion in the two air ducts, and does not cause pressure loss detrimental to the air flow in these conduits.
  • the free edges downstream of the walls lateral ones do not have the form of thinned and indented blades, like a whistle, so that the skirt described in EP-A-0 544 978 cannot ensure the correct diffusion of the fuel in the air which is obtained thanks to the specific shape of the skirt of the invention. This good diffusion results, according to the invention, from the presence of concave notches in tapered edges of opposite side walls of the skirt.
  • the skirt of the invention is advantageously such that each side wall has, upstream of the notch concave corresponding, an area of its internal face intended to be struck by one of the fuel jets respectively from the injector.
  • the skirt thus produced obtained by an adaptation of its geometry, and in particular of its length, to the injector, and in particular at the angle of separation or divergence between the fuel jets leaving the injector, provides a post-spray effect, using the thinned trailing edge of the blades as a post-diffuser.
  • the post-spraying area is thus brought closer to the intake valves, and an angular refocusing of the jets fuel coming out of the injector is obtained by their deflection through the side walls.
  • This structure has for benefits of minimizing fuel film formation liquid on the wall in the extension, called chapel, of the intake duct in the cylinder head, near the or intake valve seats, and provide more high insensitivity to variation in the separation angle between the fuel jets coming out of the injector.
  • the scatter skirt can be relatively shorter than in the above variant and / or cooperate with a twin-jet injector for which the angle separation between the jets is relatively lower, so the skirt can let the fuel jets pass freely in the space between its side walls, to the fuel passage outlet ports, which open into the two air ducts, limiting the effect post-spray in cases where a liquid fuel film forms on the walls of the skirt.
  • the bevels of the opposite side walls can delimit between them a passage of cross section constant or, preferably, a diverging passage from upstream downstream, but in no case should this passage be converge downstream, to obtain good diffusion of fuel sought.
  • Each fuel passage can be delimited between one respectively of the opposite side walls of the air duct skirt and bulkhead, but there it is also possible, as known from EP-A-0 544 978, that each fuel passage is delimited between one of the side walls and a central bulkhead element of the skirt, at its downstream end, to separate the two fuel passages as well as the two air ducts.
  • the bevels of the opposite side walls are formed at the downstream end portion of a central bore, preferably of revolution of the skirt.
  • the bevels of the side walls opposites are formed by a divergent downstream part of a central bore of the skirt.
  • the divergent downstream part of the bore central can be connected to a neck, preferably revolution, and of smaller cross section of this bore, by a substantially radial shoulder, according to a first variant, or may gradually diverge since the neck of the bore, according to a second variant.
  • the central bore of the skirt has an end portion upstream of enlarged section forming a seat for the injector.
  • the skirt is one piece with tubing element air intake, comprising at least two air ducts associated with a combustion chamber, and extending between a flange for connection to a plenum of tubing and a mounting flange to engine cylinder head, flanges in which the conduits each open respectively by an inlet port at its upstream end and through an orifice outlet at its downstream end, the skirt being integrated into a partition for forming and separating the two conduits.
  • skirts are provided for each room of combustion of the engine, all skirts can be, according to the invention, integrated into the tubing air intake to the engine, this tubing having a body made in one piece with skirts each supporting the corresponding injector, and so that the tubing present as a pre-assembled and preset component, attaching directly on the engine cylinder head.
  • the skirt according to the invention can also be removably mounted in an air intake manifold element as defined above, in which case the skirt is brought back into a housing formed in a partition for the formation and separation of two conduits.
  • the skirt according to the invention can also be removably mounted in accommodation in a training and separation of the two air ducts directly in the engine cylinder head.
  • Figures 1 to 3 show an element of air intake manifold 1, at least partially in metal or preferably molded in one piece in one synthetic material such as a thermoplastic, for the air supply to a cylinder or a combustion of an internal combustion engine, supplied with fuel by injection, and of the type comprising for example at least two intake valves per cylinder or chamber combustion.
  • the tubing element 1 comprises two air ducts 2 and 3 formed substantially side by side in its body 4, and separated from each other by a partition 5 which delimits them in their adjacent parts.
  • Each of the two conduits 2 and 3 is bent, in this example, and extends from a flange 6 of connection to a plenum of tubing (not shown), and in which the duct 2 or 3 opens through an orifice inlet at its upstream end, to a flange 7 for fixing to the cylinder head of the engine, and in which the duct 2 or 3 opens through its outlet orifice 8 at its downstream end.
  • the flange 7 has holes 9 for the passage of attachment of the tubing element 1 to the cylinder head of the engine so that each of the two outlet ports 8 of air ducts 2 and 3 either directly opposite one respectively from the two cylinder intake valves or of the associated combustion chamber.
  • the flange 6 has holes 10 for passage of fasteners on the plenum.
  • the tubing may include four tubing elements 1 mounted side by side between a common plenum, to which each of them is fixed by its flange 6, and the cylinder head of the engine, to which each is fixed by its flange 7.
  • each fuel element 1 is supplied with fuel by an injector, the silhouette of which is represented at 11 in FIGS. 2 and 3, which is of the multi-jet type, and, in this example, of the twin-jet type, that is to say delivering the fuel in the form of two divergent jets one of each other, and each intended to be introduced into one the two air ducts 2 and 3 respectively.
  • an injector the silhouette of which is represented at 11 in FIGS. 2 and 3, which is of the multi-jet type, and, in this example, of the twin-jet type, that is to say delivering the fuel in the form of two divergent jets one of each other, and each intended to be introduced into one the two air ducts 2 and 3 respectively.
  • the injector 11 is engaged and supported by its end delivering the two fuel jets in a tubular skirt 12, arranged in the partition 5 for dispersing the fuel it receives from the injector 11, thus mounted substantially between the two lines 2 and 3, and the transfer of this fuel to both air ducts 2 and 3, under conditions specific to ensure proper preparation of the air-fuel mixture for entry into the engine cylinder head.
  • the skirt 12 is in one piece with the tubing element 1, because it is integrated into the partition 5, being formed directly therein by a substantially cylindrical central bore 13, of substantially axis parallel to the axes of the downstream parts of the conduits 2 and 3 (see Figures 2 and 3).
  • the upstream end portion 14 of the bore 13 has a preferably revolution shape, of enlarged section, forming a seat for the injector 11, while downstream of the injector 11, the parts central and downstream of the bore 13 are of section substantially constant.
  • the skirt 12 is formed by two opposite side walls 15, each of which is progressively thinned at a bevel 16 decreasing thickness and / or width from upstream to downstream, to its free downstream edge 17 in thin strip, which has a concave notch 18 with concavity facing downstream and substantially symmetrical with respect to the plane median diametral of bore 13, corresponding to the plane of section III-III of Figure 2.
  • the side walls opposite 15 delimit two fuel passages 19, in communication with each other in bore 13 inside of the skirt 12, and each opening in one respectively conduits 2 and 3 through an outlet orifice 20.
  • Each outlet 20 is delimited between the notch 18 of one of the bevels 16 and a central element of partition 21 with parallel walls, which extends diametrically the skirt 12 at its downstream end, in order to separate one on the other the air ducts 2 and 3 and the fuel jets received by them from passages 19.
  • the outlet orifices 20 are preferably of axes parallel and obtained by machining, as indicated by dashed lines in Figure 3, simultaneously forming the bevels 16 and the notches 18 in the free edges 17, or by molding, unlike FIG. 9 of EP-A-0 544 978 on which the axes of the fuel passages are inclined at an angle ⁇ .
  • This solution is, for the desired precision, more economical than the skirt made in the form a socket which, according to the teachings of EP-A-0544978, must be machined and brought back into the wall that receives it in order to avoid significant dispersion on the surface of passage sections due to the non-zero value of the angle ⁇ .
  • skirt 12 is suitable, in particular in length, to the injector 11 so that each of the two jets diverging fuel from the injector 11, and shown schematically at 22 in FIG. 3, strikes an area 23 located upstream of the bevel 16 and the notch 18 on the internal face of one respectively of the side walls opposite 15.
  • each of the fuel jets 22 breaks on a side wall of the skirt 12, and the fuel for this jet is then dispersed and distributed by one of the passages 19 of the skirt 12 in one respectively of air ducts 2 and 3, in which it forms a good air-fuel mixture, thanks to the whistle shape given to each outlet 20 of the skirt 12 by the cooperation of the bevel 16, of its free edge 17 in blade thinned and its concave notch 18.
  • the skirt 12 thus produces a post-spraying effect by the use of trailing edges of thinned blades 17 of its side walls 15 as a post-diffuser, bringing together the post diffusion thus ensured of the outlet orifice 8 of ducts 2 and 3, and therefore of the intake valves corresponding to the nose of the injector 11, whence the two fuel jets 22 come out.
  • These jets 22 are of more angularly refocused by their percussion in 23 on the walls 15.
  • Figures 4 and 5 show a variant which does not essentially differs from the realization of the figures 1 to 3 only by the shape of the central bore of the skirt and the structure of the opposite side walls forming the bevels. The latter are in fact formed by a downstream part divergent from the central bore of the skirt.
  • each side wall 15' of the skirt 12 ' is formed at the downstream end of a divergent downstream part 13 'of the central bore of this skirt 12', this divergent part 13 'extending axially over the major portion of the length of the skirt 12 'and gradually diverging from a cylindrical neck 24, of smaller cross section of the bore, directly downstream of the housing 14 of enlarged section at the upstream end of the 12 'skirt.
  • the side walls 15 ' are gradually thinned downstream due to the divergent part 13 'of the bore and simultaneously of the shape of the wall delimiting the air ducts 2 and 3.
  • the bevels 16 'of this skirt 12' are thus formed by the opposite internal lateral faces of the downstream part of this divergent bore 13 ', and these bevels 16' can arise at the level of the injector's nose 11.
  • the bevels 16 "of the 15 "opposite side walls thinned downstream are also delimited on the internal face of a downstream part diverging 13 "from the central bore of the skirt 12", and can also arise at the right of the nose of injector 11. But this divergent part of 13 “bore is connected to the cylindrical neck 24 'of the bore by a substantially radial shoulder 25, and, in addition, the end upstream, in the form of a thin strip, of the central wall element 21 "is engaged axially upstream beyond the edges free 17 "of bevels 16" and between them, while in the variant of FIGS. 4 and 5, the upstream end of the central wall element 21 'is axially spaced towards downstream of the free edges 17 'of the bevels 16'.
  • skirt 12 "of Figure 6 is short enough, given the spacing angle jets from the injector 11, so that these jets pass freely, as shown in Figure 6, in space between the side walls 15 "and in the passages 19" opening into air ducts 2 and 3.
  • the 12 "skirt does not therefore produces a post-spray effect only when liquid fuel film forms on the walls of the skirt 12 ".
  • the passages of 19 'or 19 "fuel, as well as the 13' bore parts or 13 ", bevels 16 'or 16" and free edges 17' or 17 “which limit them, and the central partition element 21 'or 21 " can be done simply by performing cylindrical holes oriented along the inclined axes of 19 'or 19 "passages, in the partition air ducts, from the face of the tubing element which is turned towards the cylinder head of the engine, and up to the neck 24 or at shoulder 25, the neck 24 or 24 'and the part upstream end end 14 being machined from the other side of the tubing element.
  • These cylindrical holes simultaneously realize the notches such as 18 ', at concavity facing downstream, in the free edges 17 'or 17 "opposite walls 15 'or 15".
  • the fuel passages in the skirts can also be formed by holes parallel in short skirts or by holes inclined to each other in long skirts.
  • the skirt 12, 12 'or 12 is directly formed in the partition 5 separating the two air ducts 2 and 3.
  • the skirt can be made as described above but in the form of a removable part, which is attached to a tubing element which may have a structure practically identical to that of FIG. 1, with the difference that the skirt is reported in a tubular housing formed in this partition 5.
  • such a skirt removable can be attached directly to the cylinder head motor, by mounting in a tubular housing provided in a partition which partially delimits and separates two air ducts or channels formed directly in the cylinder head.

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

Claims (14)

  1. Dispersionsblende für Brennstoff, der von einer mehrstrahligen, vorzugsweise zweistrahligen, Einspritzdüse (1) aufgenommen und in zwei durch eine Zwischenwand (5) getrennte Lufteinlaßkanäle (2, 3) überführt wird, um eine Verbrennungskammer eines Motors mit interner, durch Einspritzung mit Brennstoff gespeister Verbrennung und insbesondere mit wenigstens zwei Einlaßventilen pro Verbrennungskammer zu versorgen, wobei die Einspritzdüse (11) im wesentlichen zwischen den Luftkanälen (2, 3) angeordnet ist und die Blende (12, 12', 12'') eine im wesentlichen rohrförmige Gestalt hat und in der Zwischenwand (5) angeordnet ist, stromabwärts der Einspritzdüse (11), so daß diese wenigstens teilweise in deren stromaufwärts liegenden Abschnitt (14) sitzt, der vorzugsweise eine umlaufende Form aufweist, während wenigstens deren stromabwärts liegender Abschnitt zwei Brennstoffpassagen (19, 19', 19'') bildet, die zum Inneren der Blende (12, 12', 12'') hin miteinander in Verbindung stehen und jeder über eine Ausgangsöffnung (20) jeweils in einen von zwei Luftkanälen (2, 3) mündet und zwischen zwei sich gegenüberlieqenden Seitenwänden (15, 15', 15'') der Blende (12, 12', 12'') eingegrenzt sind,
    dadurch gekennzeichnet, daß wenigstens in der Nähe der Ausgangsöffnungen (20) jede der sich gegenüberliegenden Seitenwände (15, 15', 15'') fortschreitend zu einem schrägen Abschluß (16, 16' 16'') zugespitzt ist, mit einer von stromaufwärts nach stromabwärts bis zu ihrem stromabwärts liegenden freien Rand (17, 17', 17'') zu einer scharfen Kante abnehmenden Dicke und/oder Breite, und in welcher eine konkave Aussparung (18, 18') mit einer stromabwärts gerichteten Wölbung ausgebildet ist.
  2. Blende nach Anspruch 1, dadurch gekennzeichnet, daß jede Seitenwand (15, 15') stromaufwärts der entsprechenden konkaven Aussparung (18, 18') eine Zone (23, 23') ihrer Innenfläche aufweist, die dazu bestimmt ist, von wenigstens einem von der Einspritzdüse (11) abgegebenen Brennstoffstrahl (22) angeprallt zu werden.
  3. Blende nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die schrägen Abschlüsse (16, 16', 16'') der Seitenwände (15, 15', 15'') zwischen sich einen stromaufwärts nach stromabwärts divergierenden Durchgang begrenzen.
  4. Blende nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Ausgangsöffnung (20) jedes Brennstoffdurchgangs (19, 19', 19'') zwischen jeweils einer der sich gegenüberliegenden Seitenwände (15, 15', 15'') und einem zentralen Trennelement (21, 21', 21'') am stromabwärts liegenden Ende der Blende (12, 12', 12'') begrenzt ist, um die Brennstoffdurchgänge (19, 19', 19'') und Luftkanäle (2, 3) zu trennen.
  5. Blende nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Abschlüsse (16) der sich gegenüberliegenden Seitenwände (15) an dem stromabwärts liegenden Endabschnitt einer vorzugsweise umlaufenden Zentralbohrung (13) der Blende (12) ausgebildet sind.
  6. Blende nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Abschlüsse (16', 16'') der sich gegenüberliegenden Seitenwände (15', 15'') durch einen stromabwärts divergierenden Abschnitt (13', 13'') einer Zentralbohrung der Blende (12', 12'') ausgebildet sind.
  7. Blende nach Anspruch 6, dadurch gekennzeichnet, daß der stromabwärts divergierende Abschnitt (13") mit einem Hals (24'), vorzugsweise umlaufend und mit einem durch eine im wesentlichen radiale Schulter (25) geringeren Querschnitt als die Zentralbohrung der Blende (12''), verbunden ist.
  8. Blende nach Anspruch 6, dadurch gekennzeichnet, daß der stromabwärts divergierende Abschnitt (13') der Zentralbohrung von einem Hals (24) aus fortschreitend divergiert, vorzugsweise umlaufend und mit einem kleineren Querschnitt als die Zentralbohrung.
  9. Blende nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß die Abschlüsse (16', 16'') der sich gegenüberliegenden Seitenwände (15', 15'') ihren Ausgangspunkt in gerader Linie von der Nase der Einspritzdüse (11) nehmen.
  10. Blende nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, daß ihre Zentralbohrung einen stromaufwärts liegenden Endabschnitt mit erweitertem Querschnitt aufweist, der einen Sitz (14) für die Einspritzdüse (11) bildet.
  11. Blende nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß sie einstückig mit einem rohrförmigen Lufteinlaßelement (1) mit wenigstens zwei Luftkanälen (2, 3), die mit einer Verbrennungskammer verbunden sind, ausgebildet ist und sich zwischen einem Flansch (6) zur Verbindung mit einem rohrförmigen Sammelraum und einem Flansch (7) zur Befestigung mit dem Zylinderkopf des Motors erstreckt, Flanschen (6, 7), in welche die Kanäle (2, 3) münden, jeder jeweils über eine Eingangsöffnung an seinem stromaufwärts liegenden Ende und über eine Ausgangsöffnung (8) an seinem stromabwärts liegenden Ende, wobei die Blende (12, 12', 12'') in eine Zwischenwand (5) zur Ausbildung und Trennung der beiden Kanäle (2, 3) integriert ist.
  12. Blende nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Brennstoffdurchgänge (19) und ihre Ausgangsöffnungen (20) um im wesentlichen zueinander parallele Achsen ausgebildet sind.
  13. Blende nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß sie in einem röhrenförmigen Lufteinlaßelement (1), das wenigstens zwei mit einer Brennkammer verbundene Luftkanäle (2, 3) umfaßt, lösbar angebracht ist und sich zwischen einem Flansch (6) zur Verbindung mit einem röhrenförmigen Sammelraum und einem Flansch (7) zur Befestigung mit dem Zylinderkopf des Motors erstreckt, Flansche (6, 7), in welche die Kanäle (2, 3) münden, jeder jeweils über eine Eingangsöffnung an seinem stromaufwärts liegenden Ende und über eine Ausgangsöffnung (8) an seinem stromabwärts liegenden Ende, wobei die Blende in eine Aufnahme eingesetzt ist, die in einer Zwischenwand (5) zur Bildung und Trennung der zwei Kanäle (2, 3) angeordnet ist.
  14. Blende nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß sie in einer Aufnahme lösbar angebracht ist, die in einer Zwischenwand zur Bildung und Trennung von zwei Luftkanälen direkt im Zylinderkopf des Motors anqeordnet ist.
EP95402704A 1994-12-01 1995-11-30 Brennstoffdispersionblende für Einspritzdüse einer Einspritzbrennkraftmaschine Expired - Lifetime EP0715069B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9414456 1994-12-01
FR9414456A FR2727722A1 (fr) 1994-12-01 1994-12-01 Jupe de dispersion de carburant, pour injecteur d'un moteur a injection

Publications (2)

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EP0715069A1 EP0715069A1 (de) 1996-06-05
EP0715069B1 true EP0715069B1 (de) 1998-06-24

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EP95402704A Expired - Lifetime EP0715069B1 (de) 1994-12-01 1995-11-30 Brennstoffdispersionblende für Einspritzdüse einer Einspritzbrennkraftmaschine

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US (1) US5575263A (de)
EP (1) EP0715069B1 (de)
DE (1) DE69503109T2 (de)
ES (1) ES2117844T3 (de)
FR (1) FR2727722A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19508636A1 (de) * 1995-03-10 1996-09-12 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
ITBO20020339A1 (it) * 2002-05-31 2003-12-01 Magneti Marelli Powertrain Spa Dispositivo ripartitore di flusso per collettori aria atto a realizzare flussi turbolenti in camera di scoppio
JP2004036558A (ja) * 2002-07-05 2004-02-05 Honda Motor Co Ltd 内燃機関の吸気装置
KR20050006743A (ko) * 2003-07-10 2005-01-17 현대자동차주식회사 린번 엔진의 흡기포트 및 그 코어
WO2006084085A1 (en) 2005-02-04 2006-08-10 Ismailov Murad M Liquid spray system and nozzle with improved spray generation
EP2604843B1 (de) * 2011-12-13 2020-06-10 Caterpillar Motoren GmbH & Co. KG Zylinderkopf mit Brennstoffführungsabschnitt

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3510224A1 (de) * 1985-03-21 1986-04-24 Daimler-Benz Ag, 7000 Stuttgart Ansaugsystem fuer eine brennkraftmaschine
US4982716A (en) * 1988-02-19 1991-01-08 Toyota Jidosha Kabushiki Kaisha Fuel injection valve with an air assist adapter for an internal combustion engine
DE3808396C2 (de) * 1988-03-12 1995-05-04 Bosch Gmbh Robert Kraftstoffeinspritzventil
AT402535B (de) * 1990-02-23 1997-06-25 Avl Verbrennungskraft Messtech Brennkraftmaschine mit zumindest zwei einlassventilen je motorzylinder
JP2516185Y2 (ja) * 1990-03-15 1996-11-06 トヨタ自動車株式会社 内燃機関の燃料噴射装置
JPH04128567A (ja) * 1990-09-20 1992-04-30 Mazda Motor Corp エンジンの吸気装置
JPH04252867A (ja) * 1991-01-25 1992-09-08 Nissan Motor Co Ltd 内燃機関の燃料供給装置
JP2938204B2 (ja) * 1991-02-22 1999-08-23 ヤマハ発動機株式会社 自動二輪車用４サイクルエンジンの吸気装置
US5265568A (en) * 1991-09-27 1993-11-30 Mazda Motor Corporation Intake system for internal combustion engine
JP3003339B2 (ja) * 1991-12-06 2000-01-24 トヨタ自動車株式会社 燃料噴射式内燃機関の吸気装置

Also Published As

Publication number Publication date
ES2117844T3 (es) 1998-08-16
EP0715069A1 (de) 1996-06-05
FR2727722A1 (fr) 1996-06-07
FR2727722B1 (de) 1997-02-14
US5575263A (en) 1996-11-19
DE69503109D1 (de) 1998-07-30
DE69503109T2 (de) 1999-01-21

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