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DE-202026100196-U1 - Device for stabilizing, fixing and positioning pump-nozzle units

DE202026100196U1DE 202026100196 U1DE202026100196 U1DE 202026100196U1DE-202026100196-U1

Abstract

Device for stabilizing, fixing and positioning at least one pump-nozzle unit (1) in a cylinder head (15) of an internal combustion engine, comprising - at least one retaining element (10) that can be connected to a housing section of the pump-nozzle unit (1) and - a connecting strip (17) supporting and/or connecting one or more retaining elements (10), characterized by that the connecting strip (17) has at least one support, contact and/or fastening area (11) for the cylinder head (15) itself or for an engine component that is positively connected to the cylinder head (15), which includes at least one support, contact and/or fastening area (11) to prevent or reduce tilting movements of the pump-nozzle units (1) about an axis (5) defined by their factory-installed fastening elements (3).

Assignees

  • 07eins GmbH

Dates

Publication Date
20260513
Application Date
20260114
Priority Date
20260114

Claims (13)

  1. Device for stabilizing, fixing and positioning at least one pump-nozzle unit (1) in a cylinder head (15) of an internal combustion engine, comprising - at least one retaining element (10) connectable to a housing section of the pump-nozzle unit (1) and - a connecting strip (17) supporting and/or connecting one or more retaining elements (10) to each other, characterized in that the connecting strip (17) has at least one support, contact and/or fastening area (11) for the cylinder head (15) itself or for an engine component force-fit connected to the cylinder head (15), which at least one support, contact and/or fastening area (11) is designed to prevent or reduce tilting movements of the pump-nozzle units (1) about an axis (5) defined by their factory-installed fastening elements (3).
  2. Device according to Claim 1 , characterized in that the support, contact and/or fastening area (11) comprises a screw connection of the connecting strip (17) to the cylinder head (15).
  3. Device according to Claim 1 or 2 , characterized in that the support, contact and/or fastening area (11) is formed by a contact surface, a nose, a web element, a dowel pin, a positive locking contour and/or a frictional locking surface.
  4. Device according to one of the preceding claims, characterized in that the retaining elements (10) have form-fitting contours (11) which abut a corresponding housing geometry of the pump-nozzle units (1) and/or partially encompass them.
  5. Device according to one of the preceding claims, characterized in that the retaining elements (10) are arranged in elongated holes or other adjustment openings (22) of the connecting strip (17) to enable individual alignment of the pump-nozzle units (1).
  6. Device according to one of the preceding claims, characterized in that the retaining elements (10) use the factory mounting holes of the pump-nozzle units (1) for a force-fit connection between retaining element (10) and pump-nozzle unit (1).
  7. Device according to one of the preceding claims, characterized in that the connecting strip (17) and at least one retaining element (10) are made of a single material, in particular in one piece.
  8. Device according to one of the preceding claims, characterized in that the connecting strip (17) is made in multiple parts and the retaining elements (10) are attached to the connecting strip (17) by means of screws, pins or other connecting means.
  9. Device according to one of the preceding claims, characterized in that the device comprises an adjusting or pre-tensioning device by which a tensile or clamping force is generated between the retaining element (10) and the connecting strip (17).
  10. Device according to Claim 9 , characterized in that the adjusting or pre-tensioning device comprises a shim element (19) that can be inserted between the retaining element (10) and the connecting strip (17).
  11. Device according to one of the preceding claims, characterized in that the transverse forces and/or tilting moments generated during the operation of the pump-nozzle units (1) by their actuating elements (2, 6) are introduced into the cylinder head (15) via the connecting strip (17).
  12. Engine component, in particular cylinder head (15), comprising a device according to one of the Claims 1 until 11 .
  13. Engine with an engine component according to Claim 12 .

Description

The invention relates to a device for stabilizing, fixing, and positioning pump-nozzle units (PDE, injectors) in cylinder heads of internal combustion engines. It relates in particular to newer generation pump-nozzle systems, such as those used in 16-valve diesel engines, in which each pump-nozzle injector is fixed directly in the housing by means of two lateral mounting screws. In older unit injector (PDE) engines, the injectors are often held in place by a separate, one-sided clamping shoe that engages in a designated groove on the injector and is secured in the cylinder head with a screw. This one-sided support leads to relative movement during operation, which can damage the sealing surfaces between the PDE and the cylinder head. To prevent this type of damage, various mounting or reinforcement bracket systems have been developed to improve upon the original method of attachment. However, these known solutions rely solely on the factory-existing mounting holes of the pump-injector units and have no mechanical contact with the cylinder head itself. In contrast, newer PDE engines feature a revised generation of injectors with two lateral mounting screws directly on the PDE housing. While this design initially appears more stable, it does not sufficiently reduce the fundamental problem of PDE tilting. Actuating the PDE plunger, for example by means of a roller rocker arm, creates an oblique force component during operation. Due to the arrangement of the two screws, a tilting axis is formed, which runs through the line connecting the two screws and allows for a further, limited tilting movement. This tilting movement leads to wear marks on the PDE seat, wear on the lower PDE housing area, wear in the PDE seat of the cylinder head, leaks in the PDE seals, and fuel entering the engine oil. All known technical solutions involve pump-nozzle units that are screwed in on one side only and support the pump-nozzle unit solely via the pump-nozzle unit housing or its mounting screws. For this reason, relative movement of the pump-nozzle unit persists, with the aforementioned consequences of damage. The invention is based on the objective of providing a technical solution that reliably stabilizes newer generation pump-nozzle units which have two lateral mounting screws. This problem is solved by the subject matter of the independent claims. Advantageous embodiments of the invention are specified in the dependent claims. The device according to the invention serves to stabilize, fix, and position at least one pump-injector unit in a cylinder head of an internal combustion engine and comprises at least one retaining element connectable to a housing section of the pump-injector unit, as well as a connecting strip supporting and/or connecting one or more retaining elements. The device is characterized in that the connecting strip has at least one support, contact, and/or fastening area for the cylinder head itself or for an engine component force-fitted to the cylinder head, which at least one support, contact, and/or fastening area is designed to prevent or reduce tilting movements of the pump-injector units about an axis defined by their factory-installed fastening elements. A key aspect of the invention is to provide a connecting strip (bridge) that connects or supports multiple pump-injector (PDE) mounting elements and additionally features at least one support, contact, and/or fastening area for the cylinder head. The bridge provides additional external support to the cylinder head structure, effectively absorbing the tilting moment of newer generation pump-injector units. Thus, the device according to the invention reliably stabilizes newer generation pump-injector units that have two lateral mounting screws. In this way, the lateral forces and tilting moments generated during operation no longer need to be absorbed exclusively via the PDE screws, but can be transferred directly into the cylinder head structure via the connecting strip. In particular, the device according to the invention prevents tilting movements of the PDE and thus minimizes wear and leaks. The device provides an external force transmission to the cylinder head. Furthermore, it supports or supplements the factory-installed PDE mountings and It can be used without modification of the PDE or the cylinder head, resulting in high ease of installation. According to a preferred embodiment of the invention, the retaining elements engage the PDE in a form-fitting and/or force-fitting manner and, in a preferred embodiment, can be adjusted in elongated holes in the connecting strip. Preferably, the factory-existing mounting holes of the PDE are used. In a preferred embodiment, a further component of the device is an adjusting or pre-tensioning device, for example in the form of a shim element that can be inserted between the retaining element and the connecting strip, in order to achieve a defined additional force and backlash-free fixation. The device acc