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
• • 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
  • 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
  • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
• • 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
  • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
  • F02M55/025—Common 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
  • 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
• • 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
  • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
  • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
  • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
• • 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
  • F02M2200/856—Mounting of fuel injection apparatus characterised by mounting injector to fuel or common rail, or vice versa
• • 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 invention relates to a fuel injection system for injecting fuel into an internal combustion engine according to the preamble of the main claim.
• DE-OS 28 29 057 discloses a fuel injection system for supplying fuel to a mixture-compressed, spark-ignited internal combustion engine as a function of operating parameters.
• 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 tube and connected to the fuel injection valve by a screw connection. Easily bendable metal serves as the branch material.
• a metal thin-walled bellows is provided in the form of a Wellrohrbalgs', offset by a lateral displacement between the attachment point of the branch line at the fuel distributor line and the installation position of the fuel injection valve and emanating from the fuel injection valve operating noise of by the yielding Balges are dampened.
• Fuel injection system is that although the flexible and thin material bellows reduces transmission of structure-borne noise to the fuel distributor line, it is itself excited to vibrate and
• Corrugated tube bellows can only be influenced to a small extent.
• the corrugated tube bellows has only a low internal damping if it consists of a resilient metal sheet.
• 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.
• a disadvantage of the known prior art is that the natural vibration behavior of the corrugated tube cannot be influenced.
• the vibration behavior is only indirectly influenced by the stiffness of the two pipeline sections to one another, since these pipeline sections are damped in their relative movements via the casing and the seal.
• the structure is also multi-part and complex. Advantages of the invention
• the fuel injection system according to the invention with the characterizing features of the main claim has the advantage that the natural resonance behavior and the noise reduction of the corrugated pipe bellows can be influenced to a large extent.
• the damping corrugated tube bellows according to the invention is also inexpensive and easy to adjust and manufacture in its damping values. Furthermore, the tightness of the fuel-carrying components advantageously does not depend on the deformability of a seal, such as an O-ring seal. The security against component failure during the service life is increased.
• Elastomer rings in the inner bends of the corrugated tubular bellows are advantageously arranged radially on the outside.
• This embodiment can be produced with O-rings, for example, and is particularly inexpensive to manufacture.
• the inner bends are at
• an elastomer hose can rest radially on the outside of the corrugated tube bellows, which only on the outside
• the Wellrohrbalg may be releasably connected to the inlet portion by a nut that presses against a sealing cone • a cylinder portion of the radially Wellrohrbalgs.
• the union nut presses a single bend of the corrugated tube bellows against the inlet section.
• FIG. 1 shows a section through an exemplary embodiment of a fuel injection system according to the invention in the sectional plane of a fuel injection valve and a corrugated pipe bellows of a fuel distributor line;
• Fig. 2 shows a cheap embodiment of a corrugated tube bellows and an inlet section of a fuel injector in section and
• Fig. 3 shows another cheap embodiment of a corrugated tube bellows and an inlet section of a fuel injector in section.
• FIG. 1 shows a section through an exemplary embodiment of a fuel injection system 1 according to the invention in the sectional plane of a fuel injection valve 2 and a corrugated tube bellows 3 of a fuel distributor line 4.
• the fuel injection valve 2 is only shown in the area of an inlet section 5 which has a thread 6 for a union nut 7.
• the sealing cone 9 is thereby compressed radially and against a cylinder section 11 of the . ellrohrbalgs 3 pressed. Due to the high surface pressure on the lower conical surface 10 and on the cylinder section .11, a fuel feed 12 is sealed without an elastomer coming into contact with the fuel.
• the corrugated tube bellows 3 is connected at its other end to the fuel distributor line by a weld seam 13 . 4 sealed.
• Elastomer rings 15 with prestress are inserted into inner bends 14 of the corrugated tube bellows 3.
• the Elatomerringe 15 lie on the outside of the corrugated tube bellows 3 in the rounded grooves formed by the inner bends 14 and have no contact with the. Fuel.
• the corrugated tube bellows 3 If, during operation of an internal combustion engine, the corrugated tube bellows 3 is excited to expand and contract, in particular in its longitudinal axis, by the vibrations that arise, the elastomer rings 15 absorb energy and dampen this movement. The noise behavior and the natural vibration behavior of the corrugated bellows 3 are thus influenced in a favorable manner. This damping is inexpensive and easy to effect. Above all, an adjustment can easily be made by using elastomer rings 15 with different modulus of elasticity and / or a different number of elastomer rings 15. For example, only every second inner bend 14 can be provided with an elastomer ring 15 in order to reduce the damping of the corrugated tube bellows 3.
• FIG. 2 shows a section through an exemplary embodiment of a fuel injection system 1 according to the invention.
• the embodiment differs from the embodiment in FIG. 1 only in the area of an inlet section 16 to the fuel injection valve 2 and a union nut 17.
• Corresponding components are . provided with the same reference numerals.
• the sectional plane of the fuel injection valve 2 and the corrugated pipe bellows 3 and the fuel distributor line 4 is shown.
• the thread 6 for the union nut 17 is formed on the inlet section 16.
• the corrugated tube bellows 3 is held in this position by a collar 18 of the union nut 17 pressing a flange 19 against the inlet section 16.
• the fuel inlet 12 Due to the surface pressure of the flanging in a sealing line 20 with respect to the inlet section 16, the fuel inlet 12 is sealed without an elastomer coming into contact with the fuel.
• the corrugated tube bellows 3 is connected at its other end in a sealing manner to the fuel distributor line 4 by the weld seam 13.
• the elastomer rings 15 are inserted with prestress.
• This embodiment advantageously advantageously simply seals and removably attaches the corrugated tube bellows 3 to the inlet section 16 of the fuel injection valve 2.
• Fig. 3 shows a further cheap embodiment of the invention.
• the embodiment corresponds to that of FIG. 2 except for the difference that no comlascomerringe 15 are present and an elastomer hose 22 is used instead.
• the corrugated tube bellows 3 and the inlet section 16 of the fuel injector 2 and the fuel distributor line 4 are shown in section.
• the corrugated tube bellows 3 is sealingly connected at its other end to the fuel distributor line 4 by the weld seam 13.
• the elastomer hose 22 ' is over the. ellrohrbalg 3 pulled for example by shrinking. a shrinking tube.
• the elastomeric tubing 22 attenuates, the 'relative movements of neighboring outer bends 21.
• the elastomeric tube 22 is in each case only in the area of the outer folds 21 on the Wellrohrbalg. 3

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)

Family

ID=7706386

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (20)

Family Cites Families (13)

• 2001
  • 2001-11-21 DE DE10157010A patent/DE10157010A1/de not_active Withdrawn
• 2002
  • 2002-08-23 EP EP02803737A patent/EP1448888A1/de not_active Withdrawn
  • 2002-08-23 KR KR10-2004-7007681A patent/KR20040062964A/ko not_active Application Discontinuation
  • 2002-08-23 JP JP2003547781A patent/JP4243193B2/ja not_active Expired - Fee Related
  • 2002-08-23 WO PCT/DE2002/003089 patent/WO2003046370A1/de not_active Application Discontinuation
  • 2002-08-23 US US10/465,961 patent/US6877484B2/en not_active Expired - Fee Related
  • 2002-08-23 CN CNB028033531A patent/CN100532824C/zh not_active Expired - Fee Related

Non-Patent Citations (1)

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