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
  • 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
• • 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
  • F02M37/04—Feeding by means of driven pumps
  • F02M37/08—Feeding by means of driven pumps electrically driven
  • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
  • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
• • 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
  • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
  • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
• • 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
• • 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

Definitions

• the invention is based on a device according to the preamble of the main claim.
• a device for delivering fuel from a reservoir to an internal combustion engine from DE 102 20 169 AI is already known, which has a suction jet pump with a nozzle.
• the disadvantage is that the nozzle clogs easily as soon as the slightest impurities get into a nozzle opening of the nozzle. This leads to a failure of the device and the vehicle stopping because a feed pump delivering the fuel to the internal combustion engine no longer receives any fuel from the storage container.
• the device according to the invention with the characterizing features of the main claim has the advantage that the manufacturing costs are reduced in a simple manner by integrally connecting the nozzle to the prefilter.
• nozzle with the prefilter is pressed, clipped, welded or glued into a nozzle section of the drive line, since this is a particularly favorable assembly solution.
• the nozzle with the prefilter is made by injection molding and from plastic, since the nozzle can be produced particularly inexpensively in this way.
• the prefilter has a mesh size of 0.5 millimeters, since impurities present in the drive line can be filtered out particularly effectively in this way.
• the nozzle is designed in the shape of a cover with a cylinder section and a bottom section, the bottom section having a nozzle opening.
• the pre-filter is ring-shaped on the end face of the nozzle facing away from the nozzle opening
• Cylinder section arranged, since the nozzle and the prefilter are particularly easy to manufacture in this way by injection molding. It is also advantageous if an end face of the prefilter facing away from the cylinder section bears sealingly against a channel wall of the drive line, since this ensures that all of the fuel in the drive line flows through the prefilter of the nozzle.
• the drive line is angled in a nozzle section with respect to the drive line upstream of the nozzle and the pre-filter and thereby forms a stop, up to which the nozzle with the integrated pre-filter can be inserted during assembly.
• the nozzle advantageously has a nozzle opening with a diameter of 0.6 to 2.5 millimeters.
• the drawing shows a device according to the invention for conveying fuel from a reservoir to an internal combustion engine of a motor vehicle.
• the device according to the invention has one in one
• the fuel delivery module 2 consists of, for example, a pot-shaped storage tank 4, in which a feed pump 7 is arranged, which draws fuel from the storage tank 4, for example via a prefilter 8 and a suction line 9, and delivers it to an internal combustion engine 11 via a pressure line 10 at an increased pressure.
• the storage tank 4 stores enough fuel so that a fuel supply to the internal combustion engine 11 is ensured by the feed pump 7, even if, for example, through cornering and the resulting sloshing movements of the fuel in the storage tank 1, no fuel is conveyed into 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 pre-filter 8 protects the device downstream of the pre-filter 8 against 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, which filters out the fine dirt particles contained in the fuel, is arranged downstream of the check valve 14.
• the check valve 14 prevents fuel from running back from the pressure line 10 from the pressure line 10 downstream of the check valve 14 via the pressure line upstream of the check valve 14, the feed pump 7, the suction line 9 and the prefilter 8 into the storage tank 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 longer allows fuel to flow 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.
• At least one suction jet pump 20 is provided in 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.
• the drive line 21 can have a throttle to limit the volume flow flowing via the drive line 21.
• the nozzle 22 is connected in one piece to a second prefilter 23 and has a nozzle opening 24 which opens into a suction chamber 27 and has a diameter of, for example, 0.6 to 2.5 millimeters.
• the nozzle 22 with the prefilter 23 is produced, for example, by means of injection molding.
• the nozzle 22 can also be assembled in one piece with the prefilter 23 by means of gluing or welding.
• the one-piece design of the nozzle 22 and the second prefilter 23 reduces the manufacturing costs of the two parts and simplifies assembly. Dirt particles are filtered out of the fuel of the drive line 21 by the second prefilter 23, so that the nozzle 22 does not become blocked. A clogged nozzle 22 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 a sufficient amount of fuel. Particularly if the fill level in the storage container 1 is low, this would result in the vehicle stopping.
• the nozzle 22 is designed, for example, in the shape of a cover with a cylinder section 22.1 and a bottom section 22.2.
• a recess 22.3 forming a storage space is arranged in the cylinder section 22.1 and is delimited by the cylinder section 22.1 and the bottom section 22.2.
• the nozzle opening 24 is provided in the bottom section 22.2 of the nozzle 22, for example centrally to the
• the drive line 21 is arranged and connects the storage space 22.3 of the nozzle 22 to the suction space 27.
• the second prefilter 23 is, for example, ring-shaped on the cylinder section 22.1 on the bottom section 22.2 arranged opposite side of the nozzle 22 and like the nozzle 22 made of plastic.
• the second prefilter 23 has, for example, a mesh size of 0.5 millimeters, but can also expressly have other mesh sizes.
• the 5 second prefilter 23 is, for example, open on its end face facing away from the cylinder section 22.1 in order to be able to demold the nozzle 22 together with the prefilter 23 after a spraying process.
• the second pre-filter 23 has a through channel 23.1 10 radially on the inside, which is connected to the storage space 22.1.
• the nozzle 22 is arranged together with the second pre-filter 23 on '• •' a the tank 1 facing the end of the drive line 21 in a, for example cylindrical 15 nozzle portion 25 of the drive line 21, the nozzle 22 downstream of the second pre-filter is provided 23rd
• the nozzle section 25 of the drive line 21 opens into the suction chamber 27 with an outlet opening 26.
• the nozzle 22 with the pre-filter 23 is clipped, glued, pressed or welded, for example, into the nozzle section 25 20, the nozzle 22 sealingly abutting the circumference of the nozzle section 25 ,
• the open end face of the second prefilter 23 facing away from the cylinder section 22.1 is, for example, one of the
• the open end face of the second prefilter 23 facing away from the cylinder section 22.1 can, however, also be used in another way, for example by gluing or welding attached to the second prefilter 23
• the nozzle 22 with the second prefilter 23 engages with the prefilter 23 in the nozzle section 25 of the drive line 21 up to the channel wall 28, so that the second prefilter 23 abuts the channel wall 28 with its end face facing the channel wall 28.
• the nozzle section 25 of the drive line 21 is, for example, angled with respect to the drive line 21 upstream of the nozzle section 25 in order to form the channel wall 28 in a simple manner. The angled part of the drive line 21 facing the suction space 27 forms the nozzle section 25.
• the channel wall 28 has, for example, a cylindrical centering shoulder 30 which engages in the second pre-filter 23 on the open end face of the second pre-filter 23 facing away from the cylinder section 22.1 and the nozzle 22 centered with the second prefilter 23 in the nozzle section 25.
• the suction space 27 is formed by an indentation 31 in the pot base 5 and is connected to the storage container 1 via a suction opening 29.
• the suction chamber 27 is delimited by the pot bottom 5, the nozzle 22, the suction opening 29 and by a mixing channel 33 provided downstream of the suction chamber 27.
• the mixing channel 33 extends from an inlet opening 33.1 of the mixing channel 33 connected to the suction chamber 27, for example in the horizontal direction ,
• a suction jet pump with a horizontal mixing channel is also referred to as a lying suction jet pump.
• the mixing channel 33 opens into the storage tank 4 at an end of the mixing channel 33 facing away from the input opening 33.1 via a further check valve, for example an umbrella valve 34, which closes in the direction of the storage container 1.
• the mixing channel 33 points at that of the input opening 33.1 opposite end, for example, a diffuser section 35, in which the mixing channel 33 widens in the direction of flow, for example transversely to the plane of the drawing.
• the screen valve 34 is provided, for example, in the pot base 5 at the end of the mixing channel 33 facing away from the inlet opening 33.1.
• the screen valve 34 consists of at least one valve opening 36 and an elastic screen 37 covering the valve opening 36, which is made of rubber, for example.
• the elastic screen 37 bends elastically in the direction facing away from the pot base 5 and thereby opens the valve opening 36.
• the elastic screen 37 bends again back to its starting position and closes the valve opening 36.
• the feed pump 7 When the feed pump 7 is operating, fuel is injected into the suction space 27 as a propellant jet via the pressure line 10, the drive line 21, the second prefilter 23, the through-channel 23.1, the storage space 22.3 and the nozzle opening 24 of the nozzle 22.
• the propellant jet entrains fuel in the flow direction when it enters the suction chamber 27, so that a negative pressure is created in the suction chamber 27, which allows further fuel to flow from the reservoir 1 into the suction chamber 27.
• the fuel of the propellant jet and the fuel entrained by the propellant jet pass through an inlet opening 33.1 of the mixing channel 33 into the mixing channel 33 and via the opened valve opening 36 of the screen valve 34 into the storage container 4.

Landscapes

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

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

Country Status (4)

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Family Cites Families (9)

• 2003
  • 2003-06-30 DE DE10329265A patent/DE10329265A1/de not_active Withdrawn
• 2004
  • 2004-05-05 EP EP04731128A patent/EP1642020B1/fr not_active Expired - Lifetime
  • 2004-05-05 WO PCT/DE2004/000947 patent/WO2005001278A1/fr active Application Filing
  • 2004-05-05 AT AT04731128T patent/ATE447102T1/de not_active IP Right Cessation
  • 2004-05-05 DE DE502004010301T patent/DE502004010301D1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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