Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
  • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
  • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
  • F04F5/46—Arrangements of nozzles
  • F04F5/466—Arrangements of nozzles with a plurality of nozzles arranged in parallel
• • 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
  • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
  • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
  • F02M37/025—Feeding by means of a liquid fuel-driven jet pump

Definitions

• the invention relates to a device according to the preamble of the main claim.
• DE 195 04 217 AI shows a device for conveying fuel with a feed-fed drive line, which has a throttle to limit the flow. Dirt particles from the fuel and the device can clog the throttle and cause the vehicle to stop.
• the device according to the invention with the characterizing features of the main claim has the advantage that the manufacturing costs are reduced and the assembly of the prefilter and the throttle in the drive line is simplified by the throttle being integrally connected to a prefilter.
• Advantageous further developments and improvements of the device specified in the main claim are possible through the measures listed in the subclaims.
• the throttle with the prefilter is manufactured by means of injection molding, since this is a particularly cost-effective manufacturing process.
• the throttle has a throttle opening with a surface area, which results in a circular design from a diameter of 0.6 to 1 millimeter, and the prefilter filter openings, the surface area of a filter opening being smaller than the surface area of the throttle opening. This ensures that all dirt particles that could clog the throttle opening are filtered out upstream of the throttle opening. It is also advantageous if the prefilter is designed as a filter bowl with a filter base and a peripheral wall, filter openings being provided in the filter base and / or in the peripheral wall, since in this way the largest possible filter area is achieved which is not susceptible to clogging.
• the throttle is designed as a cover in which a throttle opening is provided, since this represents a particularly simple embodiment variant.
• the filter bowl and the cover are connected to one another via connecting webs, since the connecting webs create a sufficient distance between the prefilter and the throttle, so that both the fuel flowing over the filter base and the fuel flowing over the peripheral wall can reach the throttle opening in a streamlined manner ,
• FIG.l shows in simplified form a device according to the invention for conveying fuel
• Fig.2 in section a throttle with integrated pre-filter
• Fig. 3 is a three-dimensional view of the exemplary embodiment according to Fig.2.
• Fig.l shows an inventive device for requesting fuel from a reservoir to an internal combustion engine of a motor vehicle.
• the device according to the invention has one in one
• Reservoir 1 arranged fuel request module 2.
• a fuel 3 is stored in the storage container 1, for example.
• the fuel delivery module 2 consists of, for example, a pot-shaped storage tank 4, in which a delivery pump 7 is arranged, which draws fuel from the storage tank 4, for example via a filter 8 and a suction line 9, and supplies it to an internal combustion engine 11 via a pressure line 10 at increased pressure.
• the storage tank 4 stores a sufficient amount of fuel so that a fuel supply to the internal combustion engine 11 is ensured by the delivery pump 7, even if, for example due to cornering and the resulting sloshing movements of the fuel in the storage tank 1, no fuel is required in the storage tank 4.
• the storage container 4 is arranged with its pot bottom 5 near a tank bottom 6 of the storage container 1.
• the feed pump 7 is, for example, a flow pump that is driven electrically by an actuator, for example an armature of an electric motor.
• the filter 8 protects the device downstream of the filter 8 from coarse dirt particles contained in the fuel.
• a check valve 14 is arranged in the pressure line 10, for example, and a main filter 15 downstream of the check valve 14, which filters out the fine dirt particles contained in the fuel.
• the check valve 14 prevents fuel when the feed pump 7 is switched off from the pressure line 10 from downstream of the check valve 14 via the pressure line upstream of the check valve 14, the feed pump 1, the suction line 9 and the filter 8 back into the storage container 4. In this way, the pressure built up by the feed pump 7 in the pressure line 10 is maintained for a certain time even when the feed pump 7 is switched off.
• a branch line 16 is provided on the pressure line 10 and opens into the storage tank 4.
• the branch line 16 has a pressure control valve 17.
• the pressure control valve 17 opens and allows fuel from the pressure line 10 to flow into the storage tank 4 via the branch line 16. In this way, the pressure in the pressure line 10 drops again below the predetermined pressure, so that the pressure control valve 17 closes and no more fuel can flow out into the storage tank 4 via the branch line 16.
• the pressure in the pressure line 10 downstream of the check valve 14 is regulated to a constant value by means of the pressure control valve 17. So that the storage tank 4 is not sucked empty by the feed pump 7, fuel must continuously flow from the storage tank 1 into the storage tank 4.
• at least one suction jet pump 20 is provided on the storage tank 4, which pumps fuel from the storage tank 1 into the storage tank 4.
• a suction jet pump is known, for example, from DE 198 56 298 CI, the content of which is expressly intended to be part of the disclosure of this application.
• a drive line 21 runs to a nozzle 22 of the suction jet pump 20.
• a pre-filter 23 is arranged in the drive line 21 and a throttle 24 is arranged downstream of the pre-filter 23.
• the pre-filter 23 protects the throttle 24 from dirt particles that could clog the throttle 24.
• the throttle 24 limits the volume flow flowing through the drive line 21.
• the throttle 24 is connected in one piece to the prefilter 23. The pre-filter 23 is thereby integrated in the throttle 24.
• the nozzle 22 is arranged on an end of the drive line 21 facing the storage container 1, for example clamped, clipped, glued or welded to or in the drive line 21.
• the nozzle 22 has a nozzle opening 28 opening into a suction space 27.
• the suction space 27 is formed by an indentation 25 in the pot base 5 and connected to the storage container 1 via a suction opening 19.
• the suction space 27 is delimited by the pot base 5, the nozzle 22, the suction opening 19 and a mixing channel 29 provided downstream of the suction space 27 and starting from the suction space 27 for example runs horizontally in the direction of the tank bottom 6.
• a suction jet pump with a horizontally running mixing channel is also referred to as a lying suction jet pump, a suction jet pump with a vertically running mixing channel, on the other hand, is called a standing suction jet pump.
• the mixing channel 29 opens into the storage tank 4 at an end of the mixing channel 29 facing the storage tank 4 via a further check valve, for example an umbrella valve 30, which closes in the direction of the storage tank 1.
• the mixing channel 29 has, for example, a diffuser section 31 at the end facing the storage tank 4 in which the mixing channel 29 widens in the direction of flow, for example transversely to the plane of the drawing.
• the throttle 24 arranged in the drive line 21 is designed, for example, in a cover-shaped manner as a cover 40, a throttle opening 41 penetrating the cover 40 being provided in the cover 40.
• the throttle opening 41 is arranged, for example, centrally to the drive line 21 and has a diameter of 0.6 to 1 millimeter, for example, in the case of a circular design, but can also expressly have a different diameter and other Foxmen with different surface areas.
• the area of the throttle opening 41 is selected, for example, so that it corresponds to the area of a circular configuration with a diameter of 0.6 to 1 millimeter.
• the cover 40 has an annular collar 44 on its circumference, which engages in the direction of the nozzle 22.
• the pre-filter 23 is arranged, which is for example cup-shaped as a filter bowl 43.
• the filter bowl 43 consists of a filter base 46 and a peripheral wall 47, the filter base 46 and the peripheral wall 47 enclosing a filter space 48 which is open on the side facing away from the filter base 46 and is in flow connection with the drive line 21.
• the filter base 46 and the peripheral wall 47 are, for example, flat, but can also be curved.
• the filter base 46 and the cover 40 lie opposite one another, the filter base 46, for example, parallel to the cover 40 or: also obliquely is arranged to cover 40.
• the filter bowl 43 is, for example, square, triangular, rectangular, polygonal, circular or oval and tapers, for example, in the direction of flow.
• Filter openings 49 of any shape are provided in the filter base 46 and / or in the peripheral wall 47 of the filter bowl 43, a filter opening 49 each having a smaller area than the throttle opening 41. This ensures that all dirt particles that could clog the throttle opening 41 are filtered out in the prefilter 23 upstream of the throttle opening 41.
• the filter openings 49 have a diameter of 0.5 millimeters, for example, with a circular design. However, circular filter openings 49 with a diameter other than 0.5 millimeters are also expressly possible.
• a large filter area is formed by the filter openings 49 provided on the filter bowl 43, so that the pre-filter 23 is insensitive to clogging. If dirt particles get stuck in or on a filter opening 49 and thereby become blocked, there are still many more
• a disk-shaped shoulder 51 is provided, which reaches radially outwards up to a drive line wall 53 of the drive line 21.
• the prefilter 23 lies with the
• the peripheral wall 47 is radially spaced from the drive line wall 53.
• the cover 40 of the throttle 24 and the pot-shaped pre-filter 23 are connected to one another in one piece via, for example, two connecting webs 54.
• the Connecting webs 54 extend vertically or inclined upwards from the top 42 of the cover 40 and are connected, for example, to the peripheral wall 47 and / or the filter base 46.
• the connecting webs 54 By means of the connecting webs 54, the cover 40 with the throttle opening 41 is spaced apart from the filter bowl 43.
• the shoulder 51, the upper side 42 of the cover 40, the drive line wall 53 and the peripheral wall 47 enclose a storage space 55.
• the filter space 48 and the storage space 55 are fluidly connected to one another via the filter openings 49.
• the fuel of the drive line 21 upstream of the pre-filter 23 flows into the filter space 48, via the filter openings 49 in the filter base 46 and / or in the peripheral wall 47 into the storage space 55.
• the fuel flows into the storage space 55
• the fuel flowing through the filter openings 49 of the peripheral wall 47 has a further flow path to the throttle opening 41 than the fuel flowing through the filter openings 49 of the filter base 46. So that the fuel flowing through the filter openings 49 of the peripheral wall 47 reaches the throttle opening 41 in a streamlined manner, the distance between the filter base 46 and the cover 40 must be chosen to be sufficiently large.
• the flow is constricted upstream of the throttle opening 41 and arrives in the form of a jet through the throttle opening 41 in the direction of the nozzle 22.
• the throttle opening 41 of the throttle 24 has the function of a flow limiter.
• the volume flow flowing through the drive line 21 and through the throttle opening 41 is set by appropriately designing the diameter of the throttle opening 41.
• the throttle 24 with the prefilter 23 is produced, for example, by means of injection molding.
• the throttle 24 can also be assembled in one piece with the prefilter 23 by means of gluing or welding.
• the one-piece design of the throttle 24 and the prefilter 23 reduces the manufacturing costs of the two parts and simplifies assembly. Dirt particles from the fuel of the drive line 21 and dirt particles originating from the manufacturing process of the device are filtered out by the pre-filter 23 upstream of the throttle 24, so that the throttle 24 does not become blocked.
• a blocked throttle 24 would result in no more fuel being pumped from the suction jet pump 20 into the storage tank 4, so that the fill level in the storage tank 4 would drop after a certain time and the feed pump 7 would not be supplied with sufficient fuel. Particularly if the fill level in the storage container 1 is low, this would result in the vehicle stopping.
• the throttle 24 with an integrated pre-filter 23 is provided as a separate component, in particular made of plastic, in the drive line 21.
• the nozzle opening 41 can be manufactured with high accuracy and without disruptive burrs. Constructive changes to adapt the volume flow flowing via the drive line 21 are therefore only required on the separate throttle 24 and not on the fuel demand module 2 itself.
• the throttle opening 41 of the throttle 24 and the nozzle opening 28 of the nozzle 22 can be chosen to be larger than in the case of a single-stage pressure drop only at the nozzle 22 without a throttle 24. In this way it is achieved that the nozzle 22 and the throttle 24 are cheaper to manufacture by injection molding and flow noise is reduced.
• the throttle 24 with the prefilter 23 is arranged, for example, near the pressure line 10 and, in the case of a suction jet pump 20 arranged upright, for example near the nozzle 22.
• FIG. 3 shows a three-dimensional view of the exemplary embodiment according to FIG. 2.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
• Fuel-Injection Apparatus (AREA)
• Filtration Of Liquid (AREA)
• Feeding And Controlling Fuel (AREA)
• Magnetic Heads (AREA)

Applications Claiming Priority (2)

Publications (2)

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• 2003
  • 2003-06-30 DE DE10329268A patent/DE10329268A1/de not_active Ceased
• 2004
  • 2004-05-05 AT AT04731127T patent/ATE487872T1/de active
  • 2004-05-05 JP JP2006515658A patent/JP4778421B2/ja not_active Expired - Fee Related
  • 2004-05-05 DE DE502004011873T patent/DE502004011873D1/de not_active Expired - Lifetime
  • 2004-05-05 EP EP04731127A patent/EP1642019B1/fr not_active Expired - Lifetime
  • 2004-05-05 WO PCT/DE2004/000946 patent/WO2005001277A1/fr active Application Filing
  • 2004-05-05 US US10/560,903 patent/US7281524B2/en active Active

Non-Patent Citations (1)

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