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
  • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
  • F02M55/004—Joints; Sealings
  • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
• • 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
  • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00

Definitions

• the invention relates to a device with a sealing plane lying between two bodies, in particular a high-pressure injection device for internal combustion engines with a sealing plane lying between two modules, according to the preamble of claim 1.
• High-through injection devices for internal combustion engines work with extremely high pressures and, depending on the area of application, are built very compactly in volume, as a rule with lines running through their length, high-pressure and low-pressure lines, which are routed via sealing levels between axially consecutive units, especially modules , which are formed by end faces of the structural units or modules.
• the assemblies or modules can be clamped against one another via union nuts or the like, in particular in the case of larger assemblies, but also via tie rods passing through them, so that in the sealing plane, already due to the quite different pressures prevailing in the passages passing through the assembly units, for the reciprocal Sealing different surface pressures should be given.
• the invention has for its object to provide a solution of how a surface pressure corresponding to the functional requirements can be achieved in the contact surfaces of the sealing plane.
• this is done by a configuration according to claim 1, according to which the surface pressure in a respective support zone is determined by the depth of the area with respect to the sealing plane adjacent to the support zone, so that a further parameter for influencing the surface pressure in the respective support zone is constructive is available which, based on the area, is practically independent of the size of the area of the end faces determining the sealing plane and which may even enable training with support zones that are partially reduced in area.
• support zones forming sealing boundaries such as support zones determining channel cross sections, can be reduced in coordination with the respective pressure to be controlled for the pressure channels using the material elasticity by corresponding depth of the recessed areas in the surface pressure.
• the solution according to the invention offers the possibility of determining the surface pressure by keeping the depth of the recessed area small in order to achieve a larger surface pressure, and increasing it in order to achieve a lower surface pressure but by increasing the depth of the recessed area. Proceeding from recessed areas between adjacent channels and these sealingly enclosing support zones can be adjoined over different depths sections of the withdrawn areas lying in the respective support zone thus specifically realize different surface pressures even in a small space, regardless of the fact that, for other reasons, the support zones are predetermined in their areal extent, in the size of their area and, if appropriate, in their area contour.
• the flow of force in the material can thus be directed in such a way that a surface pressure corresponding to the functional requirements is achieved at the contact surfaces of the body, the functional requirements to be taken into account, in addition to the sealing function, also supporting functions, for example in assembly, or other stresses.
• support zones are not only annular areas enclosing high and / or low pressure channels, but can also be assigned to separate support islands or, for example when clamping the structural units or modules via clamping bolts, the clamping bolts are provided encircling them.
• the solution according to the invention offers the approach to the functional adjustment of the surface pressure in each of these support zones, it being within the scope of the invention to form support zones by areas that are recessed relative to the sealing plane in both of the bodies to be braced against one another, or only in one of them - on the part of the other body corresponds to a flat contact surface.
• the inventive design of support zones and, paired with these, recessed areas with different depths with regard to the surface pressure with further measures for influencing the surface pressure in the support zones , which also includes targeted cross-sectional weakening, to be provided, in particular, in areas behind support zones, such measures influencing the introduction of the clamping forces into the support zones preferably being provided in circumferential surfaces of the bodies to be braced against one another, but also starting from other accessible surfaces, such as channel inner walls, and for example by grooves, in particular the respective support zone can be formed undercut grooves.
• Such relief grooves can in particular be designed as recessed grooves and in particular can also be used, as an independent inventive measure, to influence the surface pressure.
• FIG. 1 show representations of embodiments according to the invention and 2 gene
• a high-pressure side means the application of pressures in the order of magnitude up to more than 2,000 bar
• a low-pressure side application means the application of pressures up to the order of magnitude of about 800 bar, i.e. for the pressure channels 7 and 8 with pressures that are significant regardless of their height differ, so that accordingly different surface pressures are required for sealing in the sealing plane 6.
• the bracing of the bodies 2 and 3 is illustrated by means of tensioning screws 9 and 10 which act on the body 2 on the head side and are anchored on the shaft side against the body 3 by appropriate thread engagement.
• the bodies 2 and 3 are modules or structural units of a high-pressure injection device in the form of an injection injector for internal combustion engines, so that, among other things, additional thermal loads result from the application.
• An embodiment of the device 1 known from this area of application in the area of the sealing plane 6 determined by the end faces 4 and 5 is shown in FIG. 3, in which the end face 4 of the body 2 in the support against the end face 5 of the body 3 on support zones 11 to 14 is reduced, which surrounds the pressure channels 7, 8 or the bores receiving the tensioning screws 9 and 10, are delimited, in particular, enclosed by areas recessed relative to the end face 4, these areas being shown as annular, shallow depressions 15 to 18 that partially merge.
• the support of the body is concentrated by the flat areas 15 to 18, which are recessed relative to the end face 4 2 on the part of its end face 4 against the end face 5 of the body 3, which is flat in the exemplary embodiment, on the support zones 11 to 14, so that the surface pressures required for sealing at the high pressures mentioned can be realized with tensioning forces which are more acceptable by means of tensioning screws 9, 10 Dimensioning can still be applied.
• a surface pressure adapted to the functional requirements, in particular the functional requirements in the sealing plane 6, that is to say in the support zones 11 to 14, as contact surfaces between the bodies 2 and 3 can hardly be achieved in this way.
• FIG. 1 showing a solution in which the recessed areas 15 to 18, which are designed as depressions, are varied in their depth in such a way that the depth of the respectively withdrawn part
• the area in areas of high required surface pressure is small and areas in which only lower surface pressures are required, on the other hand, is enlarged.
• the support zone 11 is surrounded by a depression region 16 of small depth around the pressure channel 7, which can be subjected to very high pressures, while the pressure duct 8, which is under less pressure, is surrounded by a region 17, the depth of which, measured from the end face 4, is greater is so the
• Support zone 12 forms an annular area surrounding channel 8, which has a greater height than the annular area defining pressure zone 11 and enclosing pressure channel 7. Accordingly, the elastic deformation range around the pressure channel 8 is larger than around the pressure channel 7, so that there is a surface pressure which is adapted to the functional requirements caused by the different pressures, and accordingly the overall clamping forces to be applied can also be minimized. This also applies in principle of the fact that a certain leakage pressure can build up in the recessed, recessed areas 15 to 18.
• the desired function-adapted surface pressure distribution presupposes a correspondingly rigid, flexurally rigid behavior with respect to the bodies 2 and 3 and is favored in that the tensioning screws 9, 10 are assigned support zones 13, 14, in which, due to the comparatively great depth of the adjacent recessed areas 15, 18 result in comparatively small surface pressures. This also applies to the peripheral support zones 20, 21.
• Fig. 2 shows a further possibility for influencing the surface pressures in the support zones and for coordinating the surface pressures with the respective functional requirements, the relevant configuration according to the invention assuming that the respective support zones are used to reduce the pressure forces to be transmitted via them, i.e. to reduce the Surface pressure in these support zones, undercuts are assigned.
• FIG. 2 shows undercuts 22 and 23 for the support zones 13, 14 assigned to the tensioning screws 9, 10, FIG. 2 illustrating that the support zones formed by undercuts 22, 23 are functional areas in comparison to the exemplary embodiment according to FIG. 1 15, 18 correspond with a comparatively large depth.
• FIGS. 1 and 2 thus also illustrate the possibility of being able to carry out relatively extensive adjustments with regard to the respective surface pressure by combining undercuts with recessed areas that are correspondingly adjusted in depth, and this taking into account an additional influence by the dimensioning of the webs forming the support zones in their width.
• the depressions 22, 23 according to FIG. 2 are provided with an axially undercut to the support zones 13 and 14 and are formed, for example, by annular recesses in the respective bore wall of the bore receiving the clamping screw 9 or 10.
• FIG. 2 furthermore illustrates that corresponding effects with regard to the determination of the surface pressure in the respective support zones can also be achieved in that the areas assigned to the support zones on the opposite body are designed to be correspondingly flexible, this being the case in FIG. 2 for the peripheral support zones 20 and 21 is illustrated in each case by an undercut 24 or 25, which is arranged circumferentially in the support body 3 at a distance from the end face 4.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Fuel-Injection Apparatus (AREA)
• Circuit Arrangements For Discharge Lamps (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=32519018

Family Applications (1)

Country Status (6)

Cited By (1)

Citations (5)

• 2002
  • 2002-12-16 DE DE10258980A patent/DE10258980B4/de not_active Expired - Fee Related
• 2003
  • 2003-12-13 WO PCT/EP2003/014222 patent/WO2004055358A1/de active IP Right Grant
  • 2003-12-13 AT AT03767803T patent/ATE336653T1/de not_active IP Right Cessation
  • 2003-12-13 KR KR1020057010898A patent/KR20050085656A/ko not_active Application Discontinuation
  • 2003-12-13 DE DE50304690T patent/DE50304690D1/de not_active Expired - Fee Related
  • 2003-12-13 JP JP2004560401A patent/JP2006517272A/ja active Pending
  • 2003-12-13 EP EP03767803A patent/EP1576280B1/de not_active Expired - Lifetime

Patent Citations (5)

Non-Patent Citations (1)

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