WO2021254950A1 - Valve d'injection pour un système d'injection d'eau d'un moteur à combustion interne et système d'injection d'eau équipé d'une telle valve d'injection - Google Patents

Valve d'injection pour un système d'injection d'eau d'un moteur à combustion interne et système d'injection d'eau équipé d'une telle valve d'injection Download PDF

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Publication number
WO2021254950A1
WO2021254950A1 PCT/EP2021/065934 EP2021065934W WO2021254950A1 WO 2021254950 A1 WO2021254950 A1 WO 2021254950A1 EP 2021065934 W EP2021065934 W EP 2021065934W WO 2021254950 A1 WO2021254950 A1 WO 2021254950A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection valve
water
inlet connector
inlet
sealing ring
Prior art date
Application number
PCT/EP2021/065934
Other languages
German (de)
English (en)
Inventor
Ansgar Seitz
Elmar Okrent
Frank Miller
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2021254950A1 publication Critical patent/WO2021254950A1/fr

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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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/0221—Details of the water supply system, e.g. pumps or arrangement of valves
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/025—Adding water
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/008—Arrangement of fuel passages inside of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/14—Joints for pipes of different diameters or cross-section
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials
    • 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
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/43—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel
    • F02M2700/4302—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit
    • F02M2700/4321—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit working with fuel and admission of auxiliary fluids such as water, anti-knock agents, hydrogen, ozone or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/0332—Noise absorbers by inserting a body of compressible material in the pipe
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to an injection valve for a water injection system of an internal combustion engine with the features of the preamble of claim 1.
  • the internal combustion engine can in particular be a gasoline engine.
  • the invention also relates to a water injection system for an internal combustion engine with an injection valve according to the invention.
  • DE 10 2015 208472 A1 shows an example of an internal combustion engine with a water injection device that includes a water tank for storing water, a pump for conveying the water and a water injection valve for injecting water.
  • the pump is connected on the inlet side to the water tank via a first line and on the outlet side to the water injection valve via a second line.
  • the pump can be operated in the opposite direction of delivery.
  • a water injection device for an internal combustion engine is known from the laid-open specification DE 10 2015 208508 A1, which comprises at least two injection valves or water injectors, which are emptied one after the other by reversing the conveying direction of a conveying element.
  • the injection valves or water injectors therefore do not have to be designed to be resistant to ice pressure.
  • the fact that the injection valves are emptied one after the other should ensure that any water present is safely removed.
  • an injection valve for a water injection system of an internal combustion engine Ver comprises an annular magnetic coil for acting on a liftable armature which is connected to a valve member.
  • the injection valve further comprises a hollow cylinder-shaped core, which is at least partially surrounded by the solenoid and forms an inlet connector or is connected to an inlet connector, wherein the injection valve can be supplied with water via the inlet connector, with a body being inserted into the inlet connector , wherein an inner jacket is formed on the inlet connector in a receptacle of the inlet connector, with an outer jacket being formed on the body, the outer jacket of the body at least partially in direct contact with the inner jacket of the inlet connector, the body in the axial direction of at least a flow channel is penetrated, wherein the flow channel formed in the body has an inlet opening for supplying the egg spray valve defined with water.
  • the body is at least partially formed from an elastic's material that is directly attached to the inner jacket of the inlet connector.
  • the injection valve for a water injection system of an internal combustion engine has the advantage that the injection valve can be emptied particularly easily and quickly through the body in the inlet when the water injection system is sucked back. In this way, icing of the injection valve and thus damage to the injection valve can advantageously be prevented.
  • the injection valve is supplied with water, for example, exclusively via the flow channel formed in the body. This extends in the axial direction Rich, preferably coaxially to a longitudinal axis of the injection valve.
  • the reduced free flow cross-section of the flow channel formed in the body also increases the flow speed when water is sucked back, so that the emptying of the injection valve is accelerated at the same time. In addition, the reduced flow cross-section counteracts turbulence.
  • the inlet opening of the injection valve is not formed by the inlet connector, but rather by the body inserted into the inlet connector.
  • the body thus reduces the free flow cross-section available for supplying water to the injection valve.
  • any dead volume present in the inlet port which has to be emptied to prevent the injection valve from icing up, is minimized. This means that less water has to be sucked back from the injection valve.
  • the body can therefore preferably be inserted into the inlet connector in such a way that no cavity remains between the body and the inlet connector that is directly or indirectly in fluid connection with the flow channel formed in the body.
  • any inlet connection can advantageously be injection valve, for example a fuel injection valve, upgraded in an advantageously simple manner to an injection valve according to the invention for water injection who the.
  • the body can advantageously lie directly against the inner jacket in this area.
  • the elastic material can be used to create a tight contact between the body and the inner jacket of the inlet connector running around the body. It can thus advantageously be ensured that no water can flow between the inlet port and the body and the flow of water is thus limited to the flow channel in the body.
  • the elastic material can advantageously compensate for the expansion in volume of the water.
  • a first sealing area of the body is formed from the elastic material and lies tightly against the inner jacket of the inlet connector at an inlet end of the body and / or that a second sealing area of the body is formed from the elastic material and at an outlet-side end of the body on the êtman tel of the inlet port tightly.
  • the body on the first sealing section can rest tightly against the inner casing of the inlet connector all the way round and also rest against the inner shell of the inlet connector all the way round in the second sealing area.
  • This advantageously prevents water from flowing past the body between the body and the inner jacket.
  • the flow of water in the inlet connector is thus advantageously restricted to the flow channel formed in the body and does not take place past the body.
  • an intermediate area is formed on the body, the outer diameter of the body being tapered in the intermediate area in such a way that the outer jacket of the body in the intermediate area is spaced from the inner jacket of the inlet connector through a cavity. is standing. If water freezes in the flow channel in the area of the intermediate region of the body, the cavity can compensate for the change in volume of the water by elastically deforming the wall of the flow channel into the cavity.
  • the cavity extends in the axial direction, in particular between the first sealing area and the second sealing area.
  • the flow channel can advantageously enlarge when the water expands, in that the partition between the flow channel and the cavity is elastically deformed into the cavity.
  • an outer sealing ring is formed on the body, the body having a central area which is arranged in the receptacle of the inlet connector, the outer sealing ring being connected to the central area of the body by a connecting area of the body .
  • the body is advantageously formed in one piece from the central area, the connecting area and the outer sealing ring. While the central area is advantageously arranged in the receptacle of the inlet connector, the outer sealing ring of the body is also arranged on the outside of the inlet connector.
  • the injection valve can be sealed off from a valve cup in which the injection valve is inserted through the outer sealing ring.
  • the outer sealing ring is advantageously connected to the central area by the connection area.
  • the body can advantageously be formed entirely from the elastic material, in particular from an elastomer.
  • the central area of the body can thus be inserted into the receptacle of the inlet connection.
  • the connecting area protruding from the inlet nozzle and the outer sealing ring can be slipped over the collar of the inlet nozzle on the outside so that the outer sealing ring rests on the outside of the inlet nozzle.
  • the body can advantageously be attached to the injection valve simply and firmly.
  • connection connecting the outer sealing ring of the body to the central area of the body area of the body with respect to the outer sealing ring and the central area is formed tapered ver.
  • the connection area is advantageously designed to be flexible and the outer sealing ring can advantageously simply be slipped over the inlet connector and the body can thus advantageously be attached to the inlet connector easily and effectively.
  • the outer sealing ring of the body rests against the inlet nozzle from the outside on an outer surface of the inlet nozzle facing away from the inner jacket of the inlet nozzle.
  • the body is formed entirely from the elastic material, in particular from an elastomer.
  • a body can advantageously be manufactured well and simply. Due to the elasticity of the body, changes in volume of water that freezes in the body can advantageously be well absorbed and compensated for, so that damage to the body and the injection valve from freezing water is advantageously prevented.
  • a body formed entirely from the elastic material can advantageously be fastened well and tightly to the inlet port of the injection valve by inserting the central area into the receptacle of the inlet connector and slipping the outer sealing ring over the collar of the inlet connector.
  • the body comprises a first inner sealing ring which is formed from the elastic material and forms the first sealing area of the body and the body comprises a second inner sealing ring which is formed from the elastic material from the second sealing area of the body, wherein the body furthermore comprises a base body which is penetrated by the flow channel, the first inner sealing ring and the second inner sealing ring surrounding the base body circumferentially.
  • the body can advantageously be designed in three parts and consist of the base body, which for example can be made of a hard plastic and put together two sealing rings made of elastomer, which run around the base body, for example run in grooves in the base body.
  • the inner sealing rings then lie tightly circumferentially both on the base body and on the inner jacket of the inlet connector and seal the base body from the inner jacket of the inlet connector.
  • a water injection system for an internal combustion engine comprises an injection valve, the water injection system further comprising a water tank for storing water and a conveying element for conveying water from the water tank to the injection valve.
  • FIG. 1 shows a schematic longitudinal section through a first exemplary embodiment of the injection valve
  • Fig. 2 is an enlarged view of the longitudinal section through the first embodiment example of the injection valve from Fig. 1,
  • FIG. 3 shows a three-dimensional sectional illustration of the first exemplary embodiment of the injection valve from FIG. 1,
  • FIG. 4 shows a schematic longitudinal section through a second exemplary embodiment of the injection valve
  • 5 shows a schematic longitudinal section through a third exemplary embodiment of the injection valve
  • 6 shows a schematic longitudinal section through a fourth exemplary embodiment of the injection valve
  • Fig. 7 is a three-dimensional representation of the fourth embodiment of the injection valve A from Fig. 6,
  • Fig. 8 is a schematic representation of an embodiment of a Wasserein injection system
  • Fig. 9 is a schematic representation of an embodiment of an internal combustion engine with an injection valve.
  • valve 1 shows an injection valve 1 for a water injection system 50 of a combustion engine 100 which comprises an annular magnetic coil 2 for acting on a liftable armature 3 which is connected to a valve member 4.
  • the valve member 4 is designed as a hollow needle and, at its end facing away from the armature 3, is connected to a spherical valve closing element 29 for opening and closing at least one injection opening 30.
  • the magnet coil 2 is energized, a magnetic field is formed, the magnetic force of which moves the armature 3 including the valve member 4 and the valve closing element 29 in the direction of a core 5 in order to close a working air gap 31 formed between the core 5 and the armature 3 .
  • the spherical valve closing element 29 releases the injection opening 30.
  • the armature 3, the valve member 4 and the valve closing element 29 are returned to their starting position by means of the spring force of a return spring 32, so that the valve closing element 29 closes the injection opening 30 again.
  • the core 5 is designed as a hollow cylinder and connected via a hollow cylindrical connec tion part 33 to an inlet port 6, via which the injection valve 1 can be provided with water from a distribution line (not shown), for example a rail.
  • the inlet connection 6 is, for example, of a cup-shaped one Connection element of the distribution line, a rail cup, encompassed. The inlet area can thus be sealed off from the outside.
  • a body 8 is arranged in the inlet connection 6 of the injection valve 1.
  • the body 8 is inserted into the receptacle 60 of the inlet connector 6 from an inlet direction of the injection valve 1 in the axial direction a.
  • the body 8 is penetrated by a flow channel 9 in the axial direction a.
  • the flow channel 9 is essentially hollow cylinder-shaped.
  • the flow channel 9 defines an inlet opening 10.
  • the injection valve 1 is therefore supplied with water from the distributor line exclusively via the flow channel 9.
  • the body has an outer jacket 81.
  • the inlet connector 6 has an inner jacket 61.
  • the outer jacket 81 of the body 8 faces the inner jacket 61 of the inlet connector 6.
  • the body 8 is rotationally symmetrical.
  • the flow channel 9 formed in the body 8 preferably has a cylindrical shape.
  • the diameter d of the flow channel 9 is also preferably selected to be as small as possible in order to achieve the highest possible flow rate when sucking back and to generate a non-tearing water column.
  • the diameter d of the flow channel 9 is dimensioned such that an adequate water supply for the injection valve 1 is still ensured.
  • the diameter d of the flow channel 9 is preferably smaller than the diameter of the distribution line, for example the rail.
  • the diameter d of the flow channel 9 ist can, for example, be less than 3.0 millimeters, preferably less than 2.5 millimeters, in particular preferably less than 2.1 millimeters. In this embodiment, the diameter d of the flow channel 9 is two millimeters.
  • the diameter d of the flow channel is measured in a radial direction perpendicular to the axial direction a of the flow channel 9.
  • the body 8 in which the flow channel 9 is formed preferably has a minimum wall thickness which corresponds to the radius of the flow channel 9 or is greater.
  • the injection valve 1 By reducing the dead volume through the body 8 inserted into the receptacle 60 of the inlet connector 6, the injection valve 1 can be sucked back quickly be emptied so that damage from freezing water when the combustion engine 100 is switched off and outside temperatures are not to be feared.
  • FIGS. 1, 2 and 3 various representations of a first exemplary embodiment of the body 8 are shown.
  • the body 8 is formed in one piece from a central region 87, a connecting region 88 and an outer sealing ring 89.
  • the connecting area 88 connects the outer sealing ring 89 to the central area 87 of the body 8.
  • the central area 87 of the body 8 is arranged in the receptacle 60 of the inlet connector 6. In this case, the central region 87 in the inlet connector 6 lies tightly against the inner jacket 61 of the inlet connector 6.
  • the connecting area 88 and the outer sealing ring 89 are slipped over the collar of the inlet connector 6 in such a way that the sealing ring 89 rests tightly against an outer surface 65 of the inlet connector 6 from the outside.
  • the outer surface 65 of the inlet connector 6, on which the sealing ring 89 rests, faces away from the inner jacket 61 of the inlet connector 6.
  • the inner jacket 61 of the inlet connector 6 faces inwardly with respect to the inlet connector 6.
  • the outer surface 65 of the inlet connection 6 faces outwards.
  • the connecting area 88 is tapered.
  • the connection area 88 is flexible enough to put the outer sealing ring 89 together with the connection area 88 around the inlet connector 6.
  • the body 8 is formed entirely from an elastomer.
  • a second embodiment of the body 8 and the injection valve 1 is shown.
  • a third embodiment of the body 8 and the A injection valve 1 is shown.
  • a first sealing area 83 and a second sealing area 84 are each formed on the body 8.
  • the body 8 is made in one piece and is made entirely from elastic material, in particular made entirely from an elastomer.
  • the body 8 can, for example, also be configured in several pieces and be composed of different parts made of different materials.
  • the first sealing area 83 and the second sealing area 84 are formed from the elastic material, in particular from the elastomer. As shown in FIGS.
  • the first sealing area 83 is formed at an inlet-side end of the body 8 and the second sealing area 84 is formed at an outlet-side end. de of the body 8 is formed.
  • the body 8 with the sealing areas 83, 84 rests continuously and tightly against the inner jacket 61 of the inlet connector 6. As a result of the elasticity of the body 8 at the sealing areas 83, 84, a tight contact between the body 8 and the inner jacket 61 of the inlet connector 6 is established around the body.
  • the sealing areas 83, 84 can also be designed as a sealing lip, for example. In the exemplary embodiments illustrated in FIGS. 4 and 5, the second sealing area 84 of the body is designed as a sealing lip.
  • an intermediate area 86 is formed on the body 8 between the first sealing area 83 and the second sealing area 84, where the body 8 is in contact with the inner casing 61 of the inlet connector 6 .
  • the body 8 is not in direct contact with the inner jacket 61 of the inlet connection 6, but is spaced from it.
  • the outer diameter of the body 8 in the intermediate area 86 is tapered in comparison to the sealing areas 83, 84.
  • the outer diameter of the body 8 is measured in the radial direction r perpendicular to the axial direction a.
  • the outer diameter measures the diameter of the outer shell 81 of the body 8.
  • the body 8 in the intermediate region 86 is spaced apart from the inner shell 61 of the inlet port 6 by a cavity 11.
  • the cavity 11 extends in the axial direction a from the first sealing area 83 to the second sealing area 84 and in the radial direction r from the outer jacket 81 of the body 81 to the inner jacket 61 of the inlet port 6.
  • Water freezes in the flow channel 9 and expands in the process off the elastic body 8 can deform, for example in the radial direction, for example into the hollow space 11.
  • the elastically deformed body 8 can provide the water with the additional space required when it freezes. If the water liquefies again, the elastic body returns to its original shape.
  • the body 8 is designed in three parts.
  • the body 8 comprises a base body 73, for example made of hard plastic.
  • the body 8 furthermore comprises a first inner sealing ring 71 and a second inner sealing ring 72.
  • the sealing rings 71, 72 are formed from an elastic material, in particular from an elastomer.
  • the first inner sealing ring 71 forms the first sealing area 83 of the body 8.
  • the second inner sealing ring 72 forms the second sealing area 84 of the body 8.
  • On the base body 73 two grooves running around the base body 73 are formed.
  • the sealing rings 71, 72 are arranged in the grooves of the base body 73 and together with the base body 73 form the body 8.
  • On the body 8 is between the first sealing area 83 and the second sealing area 84, where the body 8 over the inner Sealing rings 71, 72 with the inner jacket 61 of the inlet connector 6 is in contact, an intermediate region 86 is formed.
  • the body 8 is not in direct contact with the inner jacket 61 of the inlet connector 6, but is spaced from it by a cavity 11.
  • the outer diameter of the body 8 in the intermediate area 86 is tapered in comparison to the sealing areas 83, 84.
  • FIG. 8 shows a water injection system 50 with injection valves 1.
  • What sereinspritzsystem 50 is provided for an internal combustion engine 100 and comprises at least one distributor line 7 and at least one injection valve 1.
  • a supply of the injection valves 1 with water serving distributor line 7 is also called a rail 7.
  • the water injection system 50 shown includes, for example, four such injection valves 1.
  • the injection valves 1 are connected to a distributor line 7.
  • a distributor line 7 usually has at least one cup-shaped connection element for connecting an injection valve 1.
  • the injection valve 1 is connected to the distributor line 7 via the cup-shaped connection element.
  • the connection can, for example, be a plug, press, clamp, latch and / or screw connection.
  • This connection element is also called a rail cup.
  • the rail cup encompasses the inlet-side end of the injection valve 1 in the area of the inlet connector 6.
  • An axial and / or radial gap remaining between the cup-shaped connection element and the inlet connector 6 or the body 8 can be used to accommodate a sealing element, in particular a sealing ring, can be used, so that the inlet area of the injection valve 1 is sealed off from the outside.
  • the sealing ring can be arranged on the outer circumference of the body or surround the body in sections so that it seals radially.
  • the The sealing ring can be axially supported on an annular end face of the body 8 so that it seals axially.
  • the dead volume of the rail cup depends on the specific design of the rail cup and the design of the inlet end of the injection valve 1.
  • the body 8 inserted into the inlet connector 6 can project beyond this in the axial direction a and / or in the radial direction.
  • the body 8 can have connection area 88 which protrudes beyond the inlet port 6 in the axial and radial direction.
  • the connection area 88 and the outer sealing ring 89 can be used to support the injection valve 1 on a cup-shaped connection element of the distributor line 7.
  • the distribution line 7 or the rail 7 is provided ver from a water tank 15 with water.
  • the water is fed to the distribution line 7 with the aid of a conveying element 16 via a water line 17.
  • the conveying element 16 is present as an outside half of the water tank 15 arranged, electric motor-driven pump leads out.
  • the conveying element 16 can be arranged in the water tank 15 or integrated into the bottom of the tank.
  • the conveying element 16 can be designed in such a way that it enables the conveying direction to be reversed in order to be able to drain the ice pressure-sensitive lines and / or components of the system, in particular the injection valves 1, by sucking back.
  • a shut-off element 18, in particular a non-return valve, can be arranged in the water line 17 upstream of the conveying element 16.
  • a filter 19 is arranged upstream of the shut-off element 18, which prevents the entry of harmful particles into the conveying element 16 and the injection valves 1.
  • a return line 22 branches off from the water line 17, which ends in the water tank 15. Via the return line 22, an excess flow rate of the conveying derelements 16 are fed back into the water tank 15, for example to regulate the pressure in the distribution line 7.
  • a pressure sensor 23 can be provided in the distribution line 7 or in the water line 17. So that no water is sucked in from the water tank 15 via the return line 22 during the back suction process, a check valve 20 is provided in the return line 22.
  • the check valve 20 is also preceded by a throttle 21, with which a dynamic pressure can be built up to implement the pressure regulation.
  • the injection valves 1 are arranged on an intake pipe 24, via which a combustion chamber 25 of the internal combustion engine 100 is supplied with combustion air.
  • the water is thus injected outside the combustion chamber 25 through the injection valve 1 into the intake manifold 24 of the internal combustion engine 100.
  • the water is supplied to the combustion chamber 25 together with the combustion air.
  • the fuel is produced by means of a fuel! injector 26 is injected directly into combustion chamber 25.

Abstract

L'invention concerne une valve d'injection (1) pour un système d'injection d'eau (50) d'un moteur à combustion interne (100), comprenant un solénoïde annulaire (2) destiné à agir sur un induit (3) qui peut exécuter un mouvement de course et qui est relié à un élément de valve (4), comprenant en outre un noyau cylindrique creux (5), qui est entouré au moins par endroits par le solénoïde (2) et est formé sur un col d'entrée (6) ou est relié à un col d'entrée (6), la valve d'injection (1) peut être alimentée en eau par l'intermédiaire du col d'entrée (6) ; un corps (8) est inséré dans le col d'entrée (6) ; une surface latérale interne (61) est formée sur le col d'entrée (6) dans un réceptacle (60) du col d'entrée (6) ; une surface latérale externe (81) est formée sur le corps (8) ; la surface latérale externe (81) du corps (8) est en contact direct au moins par endroits avec la surface latérale interne (61) du col d'entrée (6) ; au moins un conduit d'écoulement (9) passe à travers le corps (8) dans la direction axiale (a) ; et le conduit d'écoulement (9) formé dans le corps (8) définit une ouverture d'entrée (10) pour alimenter la valve d'injection (1) avec de l'eau. Selon l'invention, le corps (8) est formé au moins partiellement d'un matériau élastique qui s'appuie directement contre la surface latérale interne (61) du col d'entrée (6).
PCT/EP2021/065934 2020-06-19 2021-06-14 Valve d'injection pour un système d'injection d'eau d'un moteur à combustion interne et système d'injection d'eau équipé d'une telle valve d'injection WO2021254950A1 (fr)

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DE102021006272A1 (de) 2021-12-21 2023-06-22 Andreas Buchmann Vorrichtung zu kontinuierlichen Wasserentsalzung
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DE102015208508A1 (de) 2015-05-07 2016-11-10 Robert Bosch Gmbh Wassereinspritzvorrichtung für eine Brennkraftmaschine und Verfahren zum Betreiben einer solchen Wassereinspritzvorrichtung
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