WO2024200084A1 - Soupape de commande proportionnelle destinée à commander un combustible gazeux, en particulier de l'hydrogène, dans un système d'alimentation en combustible d'un moteur à combustion interne ou dans un système de pile à combustible, et unité de commande de pression et système d'alimentation en combustible - Google Patents

Soupape de commande proportionnelle destinée à commander un combustible gazeux, en particulier de l'hydrogène, dans un système d'alimentation en combustible d'un moteur à combustion interne ou dans un système de pile à combustible, et unité de commande de pression et système d'alimentation en combustible Download PDF

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Publication number
WO2024200084A1
WO2024200084A1 PCT/EP2024/057214 EP2024057214W WO2024200084A1 WO 2024200084 A1 WO2024200084 A1 WO 2024200084A1 EP 2024057214 W EP2024057214 W EP 2024057214W WO 2024200084 A1 WO2024200084 A1 WO 2024200084A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing section
fuel
control valve
proportional control
valve
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2024/057214
Other languages
German (de)
English (en)
Inventor
Patrick Hallas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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 WO2024200084A1 publication Critical patent/WO2024200084A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0239—Pressure or flow regulators therefor
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0206—Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0296—Manufacturing or assembly; Materials, e.g. coatings

Definitions

  • Proportional control valve for controlling a gaseous fuel, in particular hydrogen, in a fuel supply system of an internal combustion engine or in a fuel cell system, as well as pressure control unit and fuel supply system
  • the invention relates to a proportional control valve for controlling a gaseous fuel, in particular hydrogen, in a fuel supply system of an internal combustion engine or in a fuel cell system, as well as a pressure control unit and a fuel supply system, according to the preambles of the respective independent claims.
  • Internal combustion engines whose fuel is gaseous hydrogen are well known on the market. Such internal combustion engines can be used, for example, to drive motor vehicles.
  • the hydrogen can be stored in gaseous form in a tank-like fuel storage unit under relatively high pressure, for example 700 bar. From there it passes through a high-pressure pressure control device to a low-pressure pressure control unit and then to a fuel distribution device, which is functionally similar to the fuel rail in an internal combustion engine with gasoline or diesel direct injection.
  • the high-pressure pressure control device typically regulates the gas pressure down to, for example, around 40 bar, while the low-pressure pressure control unit regulates the gas pressure further down, typically to a pressure of around 15 bar.
  • DE 102017210 367 A1 discloses a proportional control valve as can be used in the above-described or as the low-pressure pressure control unit described above. It comprises a valve element and a valve seat which delimits a passage opening for the gaseous medium.
  • One advantage of the invention is that the assembly of the proportional control valve according to the invention is simplified.
  • the previously necessary insertion of an O-ring for sealing and the previously necessary caulking to secure the position of the first housing section can be omitted.
  • the effort required for handling parts on the production line of the proportional control valve is reduced because fewer components are required. All of this leads to a reduction in production costs.
  • the quality of the seal between the first housing section and the second housing section is also improved.
  • a proportional control valve for controlling a gaseous fuel, in particular hydrogen, in a fuel supply system of an internal combustion engine or in a fuel cell system.
  • gaseous hydrogen can be used, for example, for internal engine combustion.
  • the internal combustion engine can essentially be a typical piston internal combustion engine, such as those used in motor vehicles or stationary applications, for example for driving generators.
  • the hydrogen can be stored in gaseous form in a tank-like fuel storage unit under relatively high pressure, for example 700 bar. From there, it can be fed via a high-pressure pressure control device to a low-pressure pressure control unit and then to a fuel distribution device, which is functionally similar to the fuel rail in an internal combustion engine with gasoline or diesel direct injection.
  • the high-pressure pressure control device typically regulates the gas pressure down to, for example, approximately 40 bar, while the low-pressure pressure control unit regulates the gas pressure further down, typically to a pressure of approximately 15 bar.
  • several injectors can be connected to the fuel distribution device, which inject the fuel directly into the combustion chambers of the internal combustion engine (H2 direct injection) or into a prechamber (port fuel injection).
  • the low-pressure pressure control unit just mentioned (also called “HIPR” or “Hydrogen Injection Pressure Regulator”) regulates the pressure and thus the mass or volume flow in the fuel distribution device or to the fuel distribution device according to the specific requirements.
  • the HIPR can include at least one proportional control valve or consist of one.
  • the low-pressure pressure control unit can also include a pressure sensor and/or a safety valve. When the internal combustion engine is switched off, the safety valve is closed and the safety valve opens when the internal combustion engine is to be started.
  • An alternative application of the proportional control valve according to the invention is in a fuel cell system for generating electrical energy for both stationary and mobile applications, for example motor vehicles.
  • the proportional control valve is one that has a valve element and a valve spring.
  • the valve element interacts with a valve seat.
  • the proportional control valve is designed as a seat valve.
  • the valve seat is typically ring-shaped and it limits a passage opening for the gaseous medium, for example hydrogen.
  • the valve spring mentioned is typically designed in such a way that it acts on the valve element in the closing direction.
  • An electromagnetic actuator, for example, is typically designed in such a way that it can act on the valve element in the opening direction against the force of the valve spring.
  • the proportional control valve includes a first housing section.
  • the valve spring is clamped between the valve element and the first housing section.
  • the valve spring can be a helical compression spring.
  • the first housing section is movable relative to a second housing section to adjust a spring preload, at least initially, i.e. when assembling the proportional control valve according to the invention. In this way, by appropriately positioning the first housing section relative to the second housing section, the spring preload of the valve spring can be influenced and adjusted to a desired value.
  • the first housing section is connected to the second housing section in a fluid-tight and materially bonded manner.
  • a materially bonded connection is understood to mean a connection in which the first housing section and the second housing section are connected to one another by fusion and/or by intermolecular or chemical bonding forces, optionally via additives.
  • the fluid-tight and material-locking connection is only established after - if necessary - the first housing section has been positioned relative to the second housing section to set a desired spring preload.
  • the first housing section is first brought into a desired position relative to the second housing section and held in this position, and then the fluid-tight and material-locking connection is established.
  • the material-locking connection In order for the material-locking connection to be truly fluid-tight, it should extend over the entire extent of the circumference of the first housing section, for example in the case of a cylindrical first housing section.
  • the first housing section is connected to the second housing section in a fluid-tight and materially bonded manner by welding, soldering or gluing. These are easily implemented and cost-effective types of materially bonded connections.
  • the material connection is produced in an area which, viewed in the radial direction, is arranged between the first housing section and the second housing section.
  • a material connection can be produced in a radial gap between a radially inner first housing section and a radially outer second housing section.
  • a comparatively large connection surface is typically provided due to the axial extension of the first housing section, whereby the fluidic seal is particularly good.
  • Such a connection can be produced very well by gluing, for example.
  • the material connection is made in an axial end area of the first housing section. This area is very easily accessible for a corresponding tool.
  • Particularly suitable types of connection in this case are welding and soldering.
  • first housing section is screwed to the second housing section. This makes it easier to set the desired spring preload of the valve spring and ensures that the set axial relative position of the first housing section to the second housing section is maintained for establishing the material-locking connection.
  • the first housing section is pressed into the second housing section. This is cost-effective.
  • the invention also includes a pressure control unit in a
  • the invention further includes a fuel supply system for supplying an internal combustion engine or a fuel cell system with gaseous fuel, in particular hydrogen, comprising a fuel reservoir, at least one proportional control valve and a consumer arranged downstream of the proportional control valve, wherein the proportional control valve is designed according to the type mentioned above.
  • Figure 1 is a schematic representation of a fuel supply system for supplying an internal combustion engine with gaseous fuel with a pressure control unit with a proportional control valve;
  • Figure 2 shows a longitudinal section through the proportional control valve of Figure 1;
  • Figure 3 is an enlarged detail of Figure 2;
  • Figure 4 is a view similar to Figure 3 of an alternative embodiment.
  • Figure 5 is a representation similar to Figure 3 of yet another alternative embodiment.
  • a fuel supply system is indicated in Figure 1 by the reference number 10. It is used to supply an internal combustion engine (not shown) with a gaseous fuel, in this case for example gaseous hydrogen.
  • the hydrogen is stored in gaseous form under high pressure, for example approximately 700 bar, in a tank-like fuel storage unit 12. This can be filled via a filling connection 14.
  • An integrated unit 16 comprising a tank valve for filling and dispensing hydrogen into and from the fuel storage unit 12 and a temperature sensor for detecting the temperature of the gaseous hydrogen coming from the fuel storage unit 12 is also arranged on the fuel storage unit 12.
  • the gaseous hydrogen first reaches a filter 20 via a pressure line 18 and from there to a high-pressure pressure control device 22. This reduces the pressure of the gaseous hydrogen to a pressure in the range of 40 bar, for example.
  • the pressure line 18 leads from the high-pressure pressure control device 22 to a pressure sensor 24, a further filter 26 and an optional temperature control device 28 and finally to a low-pressure pressure control unit 30.
  • the low-pressure pressure control unit 30 comprises, in the present example, two hydraulically parallel pressure control valves 32, a low-pressure pressure sensor 34 and a safety valve in the form of a shut-off valve device 36.
  • the two pressure control valves 32 are identically constructed and are proportional control valves in the present case.
  • the low-pressure pressure control unit 30 reduces the pressure in the pressure line 18 again from the inlet-side pressure of approximately 40 bar to a pressure of approximately 15 bar, for example.
  • the pressure line 18 leads to a fuel distribution device 38, which can be designed, for example, as an elongated pipe in the manner of a typical fuel rail, as is known from gasoline and diesel fuel systems.
  • the gas pressure prevailing in the fuel distribution device 38 is detected by a pressure sensor 40.
  • injectors 42 are connected to the fuel distribution device 38, which inject the gaseous hydrogen directly into combustion chambers 44 of the internal combustion engine, for example.
  • the gaseous hydrogen is mixed with atmospheric oxygen in the combustion chambers 44, and this mixture is ignited by a respective ignition device 46.
  • the internal combustion engine is typically a 2-stroke or 4-stroke piston internal combustion engine of a largely conventional design.
  • such an internal combustion engine is used to drive a motor vehicle. However, it can also be used stationary, for example, to drive a generator to generate electricity.
  • the fuel supply system 10 and its components are controlled by an electronic control and regulating device 48, which has one or more corresponding microprocessors, a memory for program code, etc. This receives signals from, among others, the temperature sensor 16, the pressure sensor 24, the pressure sensor 40, etc.
  • the control and regulating device 48 controls various components of the fuel supply system 10, including the low-pressure pressure regulating device 30, the safety valve 36 and the ignition devices 46.
  • a control device 50 is also controlled by the control and regulating device 48, which in turn specifically controls or regulates the operation of the fuel storage device 12.
  • the proportional control valve 32 comprises an elongated housing sleeve 52. This is surrounded in its upper region in Figures 2 and 3 by an electromagnetic actuator 54 with a magnetic coil 56. A valve element 58 is guided in the housing sleeve 52, which in this case has an elongated cylindrical shape with sections of different diameters. A section of the valve element 58 with a relatively large diameter forms a magnet armature 60. The magnet armature 60 can also be a separate part that is firmly connected to the valve element 58.
  • An upper region 62 of the housing sleeve 52 in the figures is formed by a
  • Closure part 64 is closed. Between the valve element 58 and the
  • a valve spring 66 is clamped in the closure part 64, which presses the valve element 58 into the figures are applied downwards.
  • the closure part 64 forms a first housing section, whereas the upper region 62 of the housing sleeve 52 forms a second housing section.
  • the housing sleeve 52 has a lateral fluid inlet 68. In its lower region in the figures, the housing sleeve 52 is connected to a metallic valve seat body 70 in which a passage opening 72 coaxial with the housing sleeve 52 and the valve element 58 is present, on which a valve seat (without reference number) for the valve element 58 is present.
  • the proportional control valve 32 works as follows: if the solenoid coil 56 is not energized, the valve element 58 is pressed against the passage opening 72 by the valve spring 66. If the solenoid coil 56 is energized, the valve element 58 is moved upwards in the figures against the force of the valve spring 66, whereby the valve element 58 lifts off the passage opening 72. Gaseous medium or hydrogen can thus flow out of the fluid inlet 68 via the passage opening 72. The amount of flowing medium and thus ultimately the pressure in the fuel distribution device 38 can be influenced by the strength of the energization of the solenoid coil 56.
  • the first housing section 64 (closure part) with the second housing section 62 (upper region of the housing sleeve 52) will now be explained, particularly with reference to Figure 3.
  • the valve spring 66 is clamped between the valve element 58 and the first housing section 64.
  • the first housing section 64 has the shape of a bolt with a head 74 and a pin 76.
  • An outer surface 78 of the head 74 and an outer surface 80 of the pin 76 are each flat or straight.
  • the second housing section 62 of the housing sleeve 52 is complementary to the first housing section 64 with a likewise straight inner surface 82 or 84.
  • the outer surface 78 of the first housing section 64 is designed as a sliding fit relative to the inner surface 82 of the second housing section 62.
  • the outer surface 80 of the first housing section 64 is designed as a sliding fit relative to the inner surface 84 of the second housing section 62 is designed in the present case as a sliding fit.
  • the first housing section 64 is connected to the second housing section 62 in a fluid-tight and materially bonded manner, in the present case as an example by a continuous weld seam 86 running around the circumference.
  • the weld seam 86 is produced in the present case as an example in an axial end region 88 or 90 of the first housing section 64 or the second housing section 62.
  • the first housing section 64 When manufacturing the proportional control valve 32, the first housing section 64 is first inserted into the second housing section 62 in a force-controlled manner in order to set a desired spring preload of the valve spring 66. Once the first housing section 64 has reached the position in which the desired spring preload of the valve spring 66 is present, the weld seam 86 is produced and the first housing section 64 is thereby connected to the second housing section 62 in a fluid-tight and materially bonded manner.
  • the head 74 is pressed with its outer surface 78 into the inner surface 82, i.e. held in a press fit in the position in which the desired spring preload of the valve spring 66 is present.
  • the material connection between the first Housing section 64 and the second housing section 62 are also manufactured by welding, for example resistance welding.
  • FIG. 5 The embodiment shown in Figure 5 is similar to that of Figures 2 and 3. However, a thread 94 is present in the outer surface 78 of the head 74 of the first housing section 64, and a complementary thread (without reference number) is present in the inner surface 82 of the second housing section 62.
  • the first housing section 64 is therefore screwed into the second housing section 62 of the housing sleeve 52 or screwed to it.
  • the proportional control valve could be used not in a fuel supply system of an internal combustion engine, but in a fuel supply system of a fuel cell system.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne une soupape de commande proportionnelle (32) destinée à commander un combustible gazeux, en particulier de l'hydrogène, dans un système d'alimentation en combustible (10) d'un moteur à combustion interne ou dans un système de pile à combustible, ladite soupape de commande comprenant un élément de soupape (58), un ressort de soupape (66) et une première partie de logement (64), le ressort de soupape (66) étant serré entre l'élément de soupape (58) et la première partie de logement (64), et la première partie de logement (64) étant au moins initialement mobile par rapport à une seconde partie de logement (62) afin d'ajuster une précharge de ressort. Selon l'invention, la première partie de logement (64) est reliée de manière étanche aux fluides et d'un seul tenant (86 ; 92) à la seconde partie de logement (62).
PCT/EP2024/057214 2023-03-27 2024-03-19 Soupape de commande proportionnelle destinée à commander un combustible gazeux, en particulier de l'hydrogène, dans un système d'alimentation en combustible d'un moteur à combustion interne ou dans un système de pile à combustible, et unité de commande de pression et système d'alimentation en combustible Ceased WO2024200084A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023202777.1A DE102023202777A1 (de) 2023-03-27 2023-03-27 Proportionalregelventil zum Steuern eines gasförmigen Brennstoffs, insbesondere Wasserstoff, in einem Brennstoffversorgungssystem einer Brennkraftmaschine oder in einem Brennstoffzellensystem, sowie Druckregeleinheit und Brennstoffversorgungssystem
DE102023202777.1 2023-03-27

Publications (1)

Publication Number Publication Date
WO2024200084A1 true WO2024200084A1 (fr) 2024-10-03

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PCT/EP2024/057214 Ceased WO2024200084A1 (fr) 2023-03-27 2024-03-19 Soupape de commande proportionnelle destinée à commander un combustible gazeux, en particulier de l'hydrogène, dans un système d'alimentation en combustible d'un moteur à combustion interne ou dans un système de pile à combustible, et unité de commande de pression et système d'alimentation en combustible

Country Status (2)

Country Link
DE (1) DE102023202777A1 (fr)
WO (1) WO2024200084A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08334182A (ja) * 1994-04-21 1996-12-17 Itt Corp 圧縮天然ガス用減圧調整器
US5735309A (en) * 1996-04-29 1998-04-07 Detroit Diesel Corporation Low pressure gaseous fuel pressure regulator for turbocharged gaseous fuel engines
US20040231726A1 (en) * 2002-11-29 2004-11-25 Keihin Corporation Regulator
DE102010043614A1 (de) * 2010-11-09 2012-05-10 Robert Bosch Gmbh Proportionalventil zum Steuern eines gasförmigen Mediums sowie zugehöriges Betriebsverfahren
DE102016004997A1 (de) * 2015-05-01 2016-11-03 Caterpillar Inc. (n.d.Ges.d. Staates Delaware) Gasdurchflussbegrenzer für ein Kraftstoffsystem und Verfahren zu dessen Verwendung
DE102017210367A1 (de) 2017-06-21 2018-12-27 Robert Bosch Gmbh Proportionalventil zum Steuern eines gasförmigen Mediums

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08334182A (ja) * 1994-04-21 1996-12-17 Itt Corp 圧縮天然ガス用減圧調整器
US5735309A (en) * 1996-04-29 1998-04-07 Detroit Diesel Corporation Low pressure gaseous fuel pressure regulator for turbocharged gaseous fuel engines
US20040231726A1 (en) * 2002-11-29 2004-11-25 Keihin Corporation Regulator
DE102010043614A1 (de) * 2010-11-09 2012-05-10 Robert Bosch Gmbh Proportionalventil zum Steuern eines gasförmigen Mediums sowie zugehöriges Betriebsverfahren
DE102016004997A1 (de) * 2015-05-01 2016-11-03 Caterpillar Inc. (n.d.Ges.d. Staates Delaware) Gasdurchflussbegrenzer für ein Kraftstoffsystem und Verfahren zu dessen Verwendung
DE102017210367A1 (de) 2017-06-21 2018-12-27 Robert Bosch Gmbh Proportionalventil zum Steuern eines gasförmigen Mediums

Also Published As

Publication number Publication date
DE102023202777A1 (de) 2024-10-02

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