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
  • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
  • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
  • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
  • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
• • 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
• • 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
  • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
  • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down

Definitions

• the invention relates to a fuel injection system for injecting fuel into an internal combustion engine according to the preamble of the main claim.
• the fuel injection system comprises a metal fuel distributor line which is connected to at least one fuel injection valve via at least one branch line, the branch line being designed as a metal pipe and being connected to the fuel injection valve by a screw connection. Easily bendable metal is used as the branch line material.
• a metallic thin-walled bellows in the form of a corrugated tube bellows is provided, by means of which a lateral offset between the attachment point of the branch line on the fuel distributor line and the installation position of the fuel injection valve is compensated.
• a disadvantage of the fuel injection system known from DE-OS 28 29 057 is that the corrugated tube bellows Minimum number of corrugations required in order to be able to compensate for tolerances of the overall length, as well as tilting of the axes of the fuel injector and the starting point of the fuel distribution line.
• the angle compensation (angular compensation) and the lateral compensation (lateral compensation) require a minimum length of the corrugated pipe bellows.
• a pipeline connection in the form of a corrugated pipe is known from US Pat. No. 2,014,355, which is intended to prevent or reduce the transmission of vibrations.
• the outside of the corrugated pipe is surrounded by a sheath which does not touch the corrugated pipe and which is rigidly connected at one end to the one pipe section.
• the sleeve is sealed off from the other tube section by a flexible seal.
• the casing shields noises emanating from the corrugated tube.
• the fuel injection system according to the invention with the characterizing features of the main claim has the advantage that the inlet and the flexible section have a low overall height and still enable angle compensation and lateral compensation in a large area.
• the compensation takes place by elastic deformation of the flexible section itself, and there is no risk of a seal becoming leaky.
• a third sleeve section with the largest diameter axially between a first and a second is advantageous Arranged sleeve section and the first sleeve section and second sleeve section have the same diameter.
• an angular compensation and lateral compensation can be achieved with a small overall length.
• the double bends in the axial cross section are advantageously S-shaped.
• the deformation of the flexible section is evenly distributed over the S-shaped area. Length compensation over a wide range is advantageously made possible.
• the sleeve sections and the bends can consist of sheet metal.
• Fig. 1 shows a section through an embodiment of a fuel injection system according to the invention in the sectional plane of a fuel injection valve and an inlet of a fuel distributor line.
• Fig. 1 shows an axial section through an embodiment of an inventive
• Fuel injection system 1 in the plane of a fuel injection valve 2 and an inlet 3 of a fuel distribution line, not shown here.
• the fuel injection valve 2 is inserted into a bore in a cylinder head 5 of an internal combustion engine and is shown in section in the area of an inlet section 6.
• the fuel injector 2 is sealed by a sealing ring 8 made of, for example, elastomer and arranged in a groove 7.
• a first sleeve section 9 is connected to the inlet 3 via a weld seam 10.
• a second sleeve section 11 is connected to a guide section 12a, which is inserted into the inlet section 6 of the fuel injection valve 2 and which has a groove 12b with a sealing ring 12c for sealing off the inlet section 6.
• the first sleeve section 9 and the second sleeve section 11 are enclosed radially on the outside by a third sleeve section 13.
• the first, second and third sleeve sections 9, 11, 13 are connected by means of double bends 14, which are S-shaped in the illustrated axial cross section.
• First sleeve section 9, second sleeve section 11, third sleeve section 13 and S-shaped bends 14 form a flexible section 16.
• the flexible section 16 is made of a metal sheet, for example a spring steel.
• a connector plug 15 for controlling the fuel injection valve 2 is formed on the inlet section 6.
• a compensation can advantageously take place in the event of a lateral deviation or a tilting between inlet 3 and inlet section 6. Deviations in the distance between inlet 3 and inlet section 6 can also be compensated for by deforming the flexible section 16, in particular the S-shaped bends 14. Only a small overall height of the flexible section 16 is required, although relatively large tolerances can be compensated for compared to the prior art.

Landscapes

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

Applications Claiming Priority (3)

Publications (1)

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ID=7707527

Family Applications (1)

Country Status (5)

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Family Cites Families (15)

• 2001
  • 2001-11-30 DE DE10158787A patent/DE10158787A1/de not_active Withdrawn
• 2002
  • 2002-09-23 US US10/470,796 patent/US6843233B2/en not_active Expired - Fee Related
  • 2002-09-23 JP JP2003549723A patent/JP2005511955A/ja not_active Abandoned
  • 2002-09-23 EP EP02774400A patent/EP1446573A1/de not_active Withdrawn
  • 2002-09-23 WO PCT/DE2002/003600 patent/WO2003048562A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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