EP3428443B1 - Manchon de pressage pour une culasse - Google Patents

Manchon de pressage pour une culasse Download PDF

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Publication number
EP3428443B1
EP3428443B1 EP18177674.1A EP18177674A EP3428443B1 EP 3428443 B1 EP3428443 B1 EP 3428443B1 EP 18177674 A EP18177674 A EP 18177674A EP 3428443 B1 EP3428443 B1 EP 3428443B1
Authority
EP
European Patent Office
Prior art keywords
press
sleeve
cylinder head
fit sleeve
fire deck
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.)
Active
Application number
EP18177674.1A
Other languages
German (de)
English (en)
Other versions
EP3428443A1 (fr
Inventor
Dimitri Schlee
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.)
MAN Truck and Bus SE
Original Assignee
MAN Truck and Bus SE
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 MAN Truck and Bus SE filed Critical MAN Truck and Bus SE
Publication of EP3428443A1 publication Critical patent/EP3428443A1/fr
Application granted granted Critical
Publication of EP3428443B1 publication Critical patent/EP3428443B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • F01P3/16—Arrangements for cooling other engine or machine parts for cooling fuel injectors or sparking-plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/242—Arrangement of spark plugs or injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F02M53/043—Injectors with heating, cooling, or thermally-insulating means with cooling means other than air cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/02—Details
    • H01T13/08—Mounting, fixing or sealing of sparking plugs, e.g. in combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/024—Cooling cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine

Definitions

  • the present invention relates to a press-in sleeve for insertion in a fire cover opening of a cylinder head of an internal combustion engine.
  • a press-in sleeve for sealing and cooling a component projecting through a fire cover opening in the cylinder head of an internal combustion engine and a corresponding cylinder head are described.
  • Known cylinder heads of an internal combustion engine have at least one dome intended for receiving a spark plug or an injection nozzle per cylinder. Each dome is surrounded by a coolant space.
  • the document DE 41 19 594 C2 describes such a cylinder head for an internal combustion engine.
  • the documents JP S63 160351 U describes a cylinder head with a spark plug, which is housed in a thin-walled storage cylinder, which extends from a fire cover opening of the cylinder head to the opposite end of the cylinder head and is fluid-tightly connected to the cylinder head at both ends by sealing elements.
  • the document FR 2 910 555 A3 describes an injection nozzle which is pressed with its lower end directly into the bore of a cylinder head of an internal combustion engine, a nozzle also inserted into the bore of the cylinder head exerting pressure from above onto the upper edge of the injection nozzle.
  • Threaded sleeves are increasingly being used for the spark plugs or the injection nozzles in the cylinder head.
  • the use of a sleeve significantly improves the cooling of the spark plug or the injection nozzle due to the thin wall and good thermal conductivity of the sleeve.
  • the manufacture of such cylinder heads is easier.
  • Such sleeves are screwed into the fire deck of a cylinder head.
  • the external thread of the sleeve and the internal thread on the fire deck are sealed.
  • the sleeve is freely supported in the upper area and sealed with an O-ring.
  • Such a conventional sleeve is well suited for the use of a diesel injector, since the tip of the injector is narrow.
  • the injection nozzle itself is inserted from above and has no thread at the end facing the combustion chamber.
  • a spark plug In contrast to the injection nozzle, a spark plug requires considerably more space in the lower area, i. H. in the area facing the combustion chamber, the fire deck. In addition, the spark plug must be screwed in and out with a certain torque. When screwing the spark plug in or out there is a risk of twisting the sleeve relative to the cylinder head, for example unintentionally unscrewing it. This results in additional work steps. Furthermore, the tightness of the thread can be irreversibly damaged.
  • the use of a sleeve requires a larger diameter of the fire deck opening compared to the outer diameter of the injection nozzle or the spark plug, which means that the fatigue strength, especially the fatigue strength and fatigue strength, of the fire deck deteriorate.
  • a further or alternative task is to provide a sleeve for sealing and cooling a component protruding through a fire deck opening in the cylinder head of an internal combustion engine, which prevents unintentional unscrewing and / or its tightness with respect to the fire deck is not impaired by the replacement of the component.
  • a press-in sleeve for sealing and cooling a component projecting through a fire cover opening in the cylinder head of an internal combustion engine.
  • the press-in sleeve comprises a connection point at a first end of the press-in sleeve, which is designed for press-fitting into a depression in an end of the fire cover opening facing away from the combustion chamber.
  • the press-in sleeve comprises a radially inwardly projecting shoulder at a second end of the press-in sleeve opposite the first end and a jacket surface of the press-in sleeve which is closed in a fluid-tight manner between the first end and the second end and is in contact with or can be brought into contact with a water jacket surrounding the press-in sleeve.
  • the press-in sleeve can be arranged or can be arranged between the component and the fire deck (for example between the component and the fire deck opening).
  • the component can comprise an external thread for screwing in the cylinder head (for example in the fire deck opening between the countersink and the combustion chamber).
  • fire deck can refer to a surface of the cylinder head covering the combustion chamber and, perpendicular to this surface, to a partial volume of the cylinder head up to and including the connection point.
  • fire deck opening can refer to a through opening that is located between the combustion chamber and the connection point extends.
  • countersink can be related to the direction of movement of the press-in sleeve, the connection point for press-fitting into the countersink can be "lowered” by moving the press-in sleeve in the direction of the combustion chamber in the cylinder head.
  • connection point can be arranged circumferentially at the first end of the press-in sleeve, for example with respect to a longitudinal axis of the press-in sleeve.
  • the connection point can be rotationally symmetrical with respect to the longitudinal axis of the press-in sleeve.
  • the depression can be arranged circumferentially at the end of the fire cover opening facing away from the combustion chamber, for example with respect to the longitudinal axis of the press-in sleeve and / or a longitudinal axis of the fire cover opening.
  • the depression can be rotationally symmetrical with respect to the longitudinal axis of the press-in sleeve and / or the longitudinal axis of the fire deck opening.
  • connection point can be complementary to the lowering.
  • connection point and the countersink can form a press fit in the state of press joining.
  • the fire cover opening and the press-in sleeve can be coaxial in the state of the press fitting.
  • the depression can have a recess or bore which is coaxial with the fire cover opening and whose diameter is larger than a diameter of the fire cover opening (for example at the end of the fire cover opening facing the combustion chamber).
  • the component can comprise an injection nozzle (for example for diesel fuel).
  • the component can comprise a spark plug.
  • connection point can comprise a cylindrical pressing surface.
  • An axial dimension of the connection point can be several times smaller than an axial length of the press-in sleeve. "Axial” can refer to the direction of the longitudinal axis of the press-fit sleeve.
  • the axial dimension of the connection point can be a height of the depression, for example a height of the cylindrical pressing surface.
  • the axial dimension of the connection point can correspond to a distance between the end of the fire deck opening facing away from the combustion chamber (i.e. an end of the depression facing away from the combustion chamber) and an abutment surface of the depression (i.e. an end of the depression facing the combustion chamber).
  • connection point comprises a collar which is curved radially inwards.
  • the end face of the collar ie the side of the collar facing the combustion chamber, can form the contact surface.
  • the contact surface of the connection point of the press-in sleeve can be perpendicular to the longitudinal axis of the press-in sleeve.
  • the cylindrical pressing surface and / or the contact surface can be designed for fluid-tight connection with the countersink.
  • Training for fluid-tight connection, d. H. the possibility of sealing or the fluid-tight closure with respect to the countersink can comprise a circumferential groove for receiving an O-ring, for example in the pressing surface and / or the contact surface.
  • An O-ring groove can be integrated in the press surface and / or the contact surface for the fluid-tight closure of the first end of the press-in sleeve in the fire deck (for example analogous to a fluid-tight closure of the second end of the press-in sleeve in the cylinder head).
  • the pressing surface and / or the contact surface can be non-positively and / or integrally connected or connectable to the depression.
  • the depression can be filled with an adhesive or spread out before the press joining.
  • the adhesive can contribute to the mechanical connection and / or to the fluid-tight closure of the first end of the press-in sleeve in the fire deck.
  • a diameter (for example an outer diameter) of the press-in sleeve at the first end can be smaller than a diameter (for example an outer diameter) of the press-in sleeve at the second end (for example on the outer circumference of the radially inwardly projecting shoulder).
  • the press-in sleeve can be designed to be pressed into the fire cover opening from the end facing away from the combustion chamber in the direction of the combustion chamber.
  • the press-in sleeve can have different diameters (for example outer diameter) along its longitudinal axis.
  • the diameters (e.g., outer diameters) of the ferrule may be constant or increasing (i.e., growing monotonously) from the first end to the second end.
  • the cylinder head comprises a fire deck with a fire deck opening; a press-in sleeve for sealing and cooling a component projecting through the fire deck opening according to the above aspect; a depression at an end of the fire cover opening facing away from the combustion chamber, which is designed for press-fitting with the connection point at the first end of the press-in sleeve; and a cooling water space adjoining the fire deck for receiving a water jacket which the jacket surface of the press-fit sleeve closes in a fluid-tight manner between the first end and the second end.
  • the fire deck opening can have an internal thread between the depression (for example the end of the depression facing the combustion chamber) and an end of the fire deck opening facing the combustion chamber.
  • the internal thread can be designed for (for example, direct) screw connection to the component.
  • the component can hold down a radially inner shoulder of the connection point to the fire deck opening, for example push it in the direction of the combustion chamber.
  • the component for example the spark plug
  • the component can hold down the radially inner shoulder of the connection point to the fire deck opening via the screw connection.
  • the component for example the injection nozzle
  • the component can hold down the radially inner shoulder of the connection point to the fire deck opening via a claw attached to the cylinder head.
  • the press-in sleeve can be positively connected or connectable to the fire deck by means of the component (for example by fastening the component by means of the screw connection and / or the claw).
  • the component can comprise a projection which is in contact with the radially inner shoulder or can be brought into contact with it.
  • the radially inner shoulder of the connection point can be the combustion chamber-facing side of the inwardly curved collar of the connection point.
  • An inner diameter of an opening of the press-in sleeve at the second end can be larger than a wrench size of the component.
  • the opening can be bordered by the radially inwardly projecting shoulder at the second end.
  • An axial dimension of the fire deck (for example an axial length of the through opening) can be greater than the axial dimension of the connection point.
  • the second end of the press-in sleeve can be closed in a fluid-tight manner with respect to the cylinder head.
  • a seal arranged circumferentially at the second end between the press-in sleeve and the cylinder head can close the cooling water chamber in a fluid-tight manner at the second end.
  • a circumferential groove for receiving the seal (for example an O-ring) can be provided in the cylinder head and / or in the press-in sleeve at a height of the longitudinal axis corresponding to the second end.
  • the vehicle can be a land vehicle, in particular a motor vehicle (for example a commercial vehicle, a passenger car or an off-road vehicle).
  • the commercial vehicle can be, for example, a bus, a truck or a tractor.
  • the vehicle can also be a watercraft.
  • the internal combustion engine of the vehicle can be mechanically coupled or can be coupled with a drive train (for example a propeller or drive wheels) in order to deliver locomotive energy.
  • the internal combustion engine can drive units (for example on-board units or bodies) of the vehicle.
  • the units can be designed to generate electricity or comprise a pump drive (for example to provide hydrostatic drive energy or compressed air).
  • Another aspect relates to the use of such an internal combustion engine, for example in stationary or mobile use.
  • Figure 1 schematically shows a section of an exemplary embodiment of a press-in sleeve, generally designated by reference number 100, for sealing and cooling a component 106 projecting through a fire cover opening 102 in the cylinder head 104 of an internal combustion engine.
  • the press-in sleeve 100 comprises a connection point 108 at a first end 110 of the press-in sleeve 100.
  • the connection point 108 is designed for press-fitting into a depression 112 at an end of the fire cover opening facing away from the combustion chamber 114.
  • the press-in sleeve 100 comprises a radially inwardly projecting shoulder 116 at a second end 118 of the press-in sleeve 100 opposite the first end 110 and a jacket surface which is closed in a fluid-tight manner between the first end 110 and the second end 118 120, which is or can be brought into heat exchange with a water jacket 122 surrounding the press-in sleeve 100.
  • the press-in sleeve 100 can be pulled out of the depression 112 by the radially inwardly projecting shoulder 116. Furthermore, the component 106 for electrical and / or fluidic feed lines protrudes through an opening at the second end enclosed by the inwardly projecting shoulder 116. In in Figure 1 In the exemplary embodiment shown, the component 106 comprises a spark plug.
  • the press-in sleeve 100 is non-positively arranged in the state 112 in the fire deck opening 102 in the fire deck 124 at the first end 110 through the connection point 108 in the depression 112.
  • An inner surface of the fire deck opening 102 interacts directly (for example, non-positively and / or positively) with the component 106.
  • an inner diameter of the fire cover opening 102 is smaller than in the case of conventional sleeves, which extend over the entire length of the fire cover opening 102 in the fire deck 124, and for example with an external thread Are screwed into the fire deck opening.
  • fire deck opening 102 may refer to a lowermost portion (i.e. the fire deck portion) of a cylinder head passage.
  • the cylinder head passage can comprise a total of several coaxial (for example stepped in diameter) bores through the entire cylinder head 104.
  • a cooling water chamber 126 for receiving the water jacket 122 borders on the fire deck 124. Since the press-in sleeve 100 directly contacts the component 106 at the first end 110, and the jacket surface 120 of the press-in sleeve 100 is in extensive heat exchange with the water jacket 122, effective cooling of the component is achieved 106 ensured.
  • connection point 108 comprises a circumferential, for example cylindrical, pressing surface 128.
  • the pressing surface 128 cooperates with the countersink 112 by radial pressure forces.
  • This press fit of the press surface 128 in the depression 112 extends parallel to a longitudinal axis of the press sleeve 100 over an axial dimension 130 of the connection point 108. That is, the axial dimension 130 of the connection point 108 in the direction of the longitudinal axis is the overlap between the press surface 128 and one cylindrical inner surface of counterbore 112 in fire deck 124.
  • the axial dimension 130 of the connection point 108 is several times smaller (ie a fraction significantly smaller than half) of an axial length 134 of the press-in sleeve 100.
  • the axial length 134 is the total length of the press-in sleeve from the first end 100 to the second end 118 along the longitudinal axis the press-in sleeve 100.
  • the fire cover opening 102 comprises an internal thread 136 between the countersink 112 and an end of the fire cover opening 102 facing the combustion chamber 114 for direct screw connection between the fire cover 124 and the component 106.
  • the component 106 comprises above an external thread which interacts with the internal thread 136 is formed, a (for example, all-round closed) projection.
  • the cantilever of the component 106 lies within the press-in sleeve 100 against a shoulder 144 of the connection point 108 or can be brought into contact with the shoulder 144.
  • connection point 108 at the first end 110 of the press-in sleeve 100 is arranged in the state of press-fitting between the component 106 (more precisely the overhang of the component 106) and the fire deck 124 (more precisely the depression 112 in the fire deck 124).
  • the component 106 holds the connection point 108 positively in the depression 112 of the fire deck 124 via the screw connection on the internal thread 136 of the fire deck opening 102 and the contact with the radially inner shoulder 144 of the press-in sleeve 100.
  • the press-in sleeve does not extend through the entire fire deck 124.
  • the axial dimension 130 of the connection point 108 is smaller, for example several times smaller, than one axial dimension 142 of the fire deck 124 between the countersink 112 and the combustion chamber 114.
  • the distance between the combustion chamber 114 and the press-in sleeve 100 according to the axial dimension 142 can prevent a thermal short circuit between the combustion chamber 114 and the water jacket 122.
  • Figure 2 schematically shows a three-dimensional sectional view with a sectional plane through the cylinder head 104 and the press-in sleeve 100 arranged therein.
  • the longitudinal axis of the press-in sleeve 100 is (in the vertical direction in FIG Figure 2 ) within the cutting plane.
  • a spark plug is arranged coaxially to the longitudinal axis of the press-in sleeve 100 as an example of the component 106 in the press-in sleeve 100.
  • a wrench size 140 of the component 106 is smaller than an inner diameter 138 of the opening of the sleeve 100 at the second end 118.
  • a key for example a hexagon socket wrench, can be opened through the opening of the sleeve 100 on the radially inwardly projecting shoulder 116 of the press-in sleeve 100 assembled component 106 to unscrew the component 106.
  • no torque is transmitted to the press-in sleeve 100 during unscrewing, as a result of which the press-on sleeve 100 remains fastened to the first end 110 even after being unscrewed.
  • a seal 146 is arranged circumferentially at the second end 118 between the press-in sleeve 100 and the filter head 104, which seals the outer surface 120 to the cooling water chamber 126 at the second end 118 in a fluid-tight manner.
  • a circumferential groove is provided above (ie on the side facing away from the combustion chamber 114) of the cooling water chamber 126 in the cylinder head 104 for receiving an O-ring.
  • the press-in sleeve 100 is glued to the connection point 108, in addition to the press connection.
  • a seal for.
  • an O-ring can be arranged in an O-ring groove (on the part of the press-in sleeve 100 or the fire deck 124) in order to seal the cooling water chamber 126 to the combustion chamber 114 at the first end 110.
  • the press-in sleeve 100 for sealing and cooling a spark plug is described as an example of the component 106
  • the press-in sleeve 100 and its functions can be implemented by further exemplary embodiments for each component 106 projecting through the fire cover opening 102 in the cylinder head 104 of the internal combustion engine.
  • each component 106 that tapers toward the combustion chamber 114 for example an injection nozzle for diesel fuel, can be sealed and cooled by an exemplary embodiment of the press-in sleeve 100.
  • the internal thread 136 between the countersink 112 and the combustion chamber 114 can be omitted.
  • an injection nozzle can be attached as component 106 by a press fit in the fire cover opening 102.
  • Assembly of the component 106 by means of an exemplary embodiment of the press-in sleeve 100 can include a step of pressing the press-in sleeve 100 onto a pressing device with a specific pressing force, and a subsequent step of screwing or pressing in the component 106.
  • the press-in sleeve 100 can be pressed into the depression 112 when the component 106 is screwed in or pressed in, i. H. simultaneously with the assembly of the component 106. In the latter case, the component 106 presses the press-in sleeve 100 into the depression 112 (for example by means of its projection).
  • Disassembly of the press-in sleeve 100 on the cylinder head 104 can include the step of pulling or unscrewing the component 106 and the subsequent step of pulling off the press-in sleeve on the radially inwardly projecting shoulder 116.
  • the connection between the press-in sleeve 100 and the cylinder head 104 remains detachable and repairable.
  • the press-in sleeve 100 enables the cylinder head 104 to be manufactured more cheaply, in particular an automated assembly of the press-in sleeve 100 and / or the component 106.
  • the cutting of an additional thread in the fire cover opening for fastening a conventional sleeve can be omitted.
  • a lowering 112 is provided in the fire deck 124 for the press fit of the press-in sleeve 100, which does not extend continuously over the axial dimension 142 of the fire deck 124 to the combustion chamber 114.
  • the axial dimension 130 of the connection point 108 is 5 mm or less.
  • An internal thread 136 for the component 106 (for example a spark plug) can be cut into the fire deck 124 or a simple bore for the component 106 (for example a diesel injector) can be drilled.
  • the press-in sleeve 100 thus enables a diameter of the fire cover opening 102 toward the combustion chamber 114 that is limited to the outer diameter of the respective component 106. Due to the smaller opening tailored to the outer diameter of the component 106 at the end of the fire deck opening 102 facing the combustion chamber 114, a higher strength of the fire deck can be achieved.
  • the press-in sleeve 100 is pressed into the fire deck 124 and optionally glued.
  • the component 106 additionally holds the press-in sleeve 100 in position.
  • the press-in sleeve 100 is held in the fire deck 124 in a force-fitting and form-fitting manner, and optionally in a material-fitting manner.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Claims (14)

  1. Manchon de pressage (100) pour réaliser l'étanchéité et le refroidissement d'un composant (106) pénétrant à travers une ouverture de couvercle d'extinction (102) dans la culasse (104) d'un moteur à combustion interne, comprenant :
    une zone de liaison (108) au niveau d'une première extrémité (110) du manchon de pressage (100) qui est réalisée pour l'assemblage par pressage dans un renfoncement (112) au niveau d'une extrémité de l'ouverture de couvercle d'extinction (102) opposée à une chambre de combustion (114), la zone de liaison (108) comprenant un collet (144) recourbé radialement vers l'intérieur, avec une surface d'appui (132) ;
    un épaulement (116) saillant radialement vers l'intérieur au niveau d'une deuxième extrémité (118) du manchon de pressage (100) opposée à la première extrémité (110) ; et
    une surface d'enveloppe (120) du manchon de pressage (100) fermée de manière étanche aux fluides entre la première extrémité (110) et la deuxième extrémité (118), laquelle est ou peut être amenée en contact avec une chemise d'eau (122) entourant le manchon de pressage (100).
  2. Manchon de pressage selon la revendication 1, dans lequel le composant (106) comprend une buse d'injection et/ou une bougie d'allumage.
  3. Manchon de pressage selon la revendication 1 ou 2, dans lequel la zone de liaison (108) comprend une surface de pressage cylindrique (128).
  4. Manchon de pressage selon la revendication 3, dans lequel une dimension axiale (130) de la zone de liaison (108) est beaucoup plus petite qu'une longueur axiale (134) du manchon de pressage (100) .
  5. Manchon de pressage selon l'une quelconque des revendications 1 à 4, dans lequel la surface de pressage (128) et/ou la surface d'appui (132) sont réalisées de manière à assurer une liaison étanche aux fluides avec le renfoncement (112).
  6. Manchon de pressage selon l'une quelconque des revendications 1 à 5, dans lequel la surface de pressage (128) et/ou la surface d'appui (132) sont ou peuvent être connectées par engagement par force et/ou par liaison de matière au renfoncement (112) .
  7. Manchon de pressage selon l'une quelconque des revendications 1 à 6, dans lequel un diamètre du manchon de pressage (100) au niveau de la première extrémité (110) est inférieur à un diamètre du manchon de pressage (100) au niveau de la deuxième extrémité (118).
  8. Culasse (104) d'un moteur à combustion interne, comprenant :
    un couvercle d'extinction (124) avec une ouverture de couvercle d'extinction (102) ;
    un manchon de pressage (100) pour réaliser l'étanchéité et le refroidissement d'un composant (106) pénétrant à travers l'ouverture de couvercle d'extinction (102), selon l'une quelconque des revendications 1 à 7 ;
    un renfoncement (112) au niveau d'une extrémité de l'ouverture de couvercle d'extinction (102) opposée à une chambre de combustion (114), qui est réalisé pour l'assemblage par pressage avec la zone de liaison (108) au niveau de la première extrémité (110) du manchon de pressage (100) ; et
    un espace d'eau de refroidissement (126) bordant le couvercle d'extinction (124) pour recevoir une chemise d'eau (122), qui ferme de manière étanche aux fluides la surface d'enveloppe (120) du manchon de pressage (100) entre la première extrémité (110) et la deuxième extrémité (118).
  9. Culasse selon la revendication 8, dans laquelle l'ouverture de couvercle d'extinction (102) entre le renfoncement (112) et une extrémité de l'ouverture de couvercle d'extinction (102) tournée vers la chambre de combustion (114) présente un filetage interne (136) pour la connexion par vissage avec le composant (106).
  10. Culasse selon la revendication 9, dans laquelle le composant (106) maintient vers le bas, par le biais de la connexion par vissage, un épaulement situé radialement à l'intérieur (144) de la zone de liaison (108) avec l'ouverture de couvercle d'extinction (102).
  11. Culasse selon l'une quelconque des revendications 8 à 10, dans laquelle le manchon de pressage (100) est ou peut être connecté au moyen du composant (106) par engagement par correspondance de formes au couvercle d'extinction (124).
  12. Culasse selon l'une quelconque des revendications 8 à 11, dans laquelle une dimension axiale (142) du couvercle d'extinction (124) est supérieure à une dimension axiale (130) de la zone de liaison (108) .
  13. Culasse selon l'une quelconque des revendications 8 à 12, dans laquelle un joint d'étanchéité (146) disposé sur la périphérie au niveau de la deuxième extrémité (118) entre le manchon de pressage (100) et la culasse (104) ferme de manière étanche aux fluides la surface d'enveloppe (120) vers l'espace d'eau de refroidissement (126).
  14. Véhicule comprenant un moteur à combustion interne qui comprend une culasse (104) selon l'une quelconque des revendications 8 à 13.
EP18177674.1A 2017-07-11 2018-06-14 Manchon de pressage pour une culasse Active EP3428443B1 (fr)

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DE102017115461.2A DE102017115461A1 (de) 2017-07-11 2017-07-11 Einpresshülse für einen Zylinderkopf

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JP (1) JP7221001B2 (fr)
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RU2768125C2 (ru) 2022-03-23
US10648424B2 (en) 2020-05-12
RU2018125283A3 (fr) 2021-11-09
EP3428443A1 (fr) 2019-01-16
US20190017464A1 (en) 2019-01-17
JP2019019822A (ja) 2019-02-07
RU2018125283A (ru) 2020-01-10
DE102017115461A1 (de) 2019-01-17
BR102018013509A2 (pt) 2019-06-11
JP7221001B2 (ja) 2023-02-13
CN109236484A (zh) 2019-01-18

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