GB2622014A

GB2622014A - Hydrogen regulation module for a hydrogen internal combustion engine

Info

Publication number: GB2622014A
Application number: GB2212553.8A
Authority: GB
Inventors: Tapin Christophe
Original assignee: Delphi Technologies IP Ltd
Current assignee: Delphi Technologies IP Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2024-03-06
Also published as: GB202212553D0; WO2024046940A1

Abstract

A hydrogen regulation module for a hydrogen internal combustion engine, wherein the module 10 comprises a common body (12, fig.4) containing a gas flow path 11 for a hydrogen stream. The common body integrates at least a first and a second component each comprising: a functional portion (84, fig.4) with a valve arrangement; and an actuator portion (82, fig.4) comprising a solenoid 50.2 to move an actuating element (82.4, fig.4). The functional portion and actuator portion cooperate to energize the solenoid to move the actuating element and interact with the functional portion. The functional portion is arranged in a recess (61, fig.3) in the common body, which opens into the gas flow path. The actuating portions of the first and second components are of same design. The module integrates all of the components at one location and can be tested as a single component, providing ease of installation and improved safety.

Description

Hydrogen regulation module for a hydrogen internal combustion engine FIELD OF THE INVENTION [0001] The present invention relates to a hydrogen regulation module for a hydrogen internal combustion engine.

BACKGROUND OF THE INVENTION

Hydrogen is increasingly viewed, along with electric vehicles, as one way to slow the environmentally destructive impact of the planet's 1.2 billion vehicles, most of which burn gasoline and diesel fuel. Manufacturers of large trucks, commercial vehicles as well as passenger vehicles are currently developing hydrogen engines, i.e. where hydrogen is used as fuel instead of the usual liquid fuels.

Hydrogen is stored aboard the vehicle in a high-pressure tank, at pressures in the order of 500 to 700 bars and above. The tank is part of a fuel supply system that comprises a variety of components configured to allows discharging predetermined amounts of hydrogen into the respective combustion chambers.

On the downstream, low-pressure side of the fuel supply system is a fuel rail to which a number of fuel injectors are connected. Upstream, thereof, components with various functionalities are required, such as a shut off valve to stop the flow of hydrogen to the fuel rail when the engine is down, and a pressure regulating valve to expand the high-pressure hydrogen flow discharged from the tank to operational pressure in the range of 20 to 40 bars. Conventionally the fuel supply system further comprises a filter, a pressure relief valve configured to open when the pressure downstream of the pressure regulator increases beyond a predetermined pressure threshold. It is also required to monitor the hydrogen temperature and pressure upstream of the regulator.

The integration of the various components in the engine may be somewhat complex, due to different packaging of the individual components. Furthermore, great care must be taken in the assembly/sealing of the components, due to the high likeability of hydrogen.

OBJECT OF THE INVENTION

[0002] The object of the present invention is to provide a solution to the above problems, by which packaging and safety are improved.

SUMMARY OF THE INVENTION

The present invention relates to a hydrogen regulation module for a hydrogen internal combustion engine, wherein the hydrogen regulation module (HRM) comprises a common body that defines therein a gas flow path for a hydrogen stream, the gas flow path extending from an inlet port to an outlet port, the common body integrating at least a first and a second component comprising each: a functional portion with a valve arrangement having a valve seat with an orifice that can be opened or closed by a moveable valve member; and an actuator portion comprising a solenoid arrangement configured to move an actuating element.

The functional portion and actuator portion are configured to cooperate such that energizing the solenoid arrangement of said actuator portion allows moving the actuating element and interact with the functional portion.

The functional portion is arranged in a recess in the common body. The recess opens into the gas flow path. The actuator portion is arranged at least in part outside of said common body.

It shall be appreciated that actuating portions of the first and second components are of same design.

The invention hence provides a hydrogen regulation module which integrates all of the components at one location thanks to the use of the common body, which is favorable in terms of packaging. The HRM can be tested as a single component, both in terms of operation and in terms of sealing. It thus provides ease of installation in the engine and improved safety.

Furthermore, the inventive HRM offers a convenient design in that the actuating portions are of same design. In particular, the actuating portions of the components have the same design of electromagnetic circuit. That is, the actuators have same electromagnetic properties and behave in a similar manner.

Advantageously, the actuating portion of the first and second components comprises a solenoid coil and armature of same design, whereby both actuating portions deliver the same actuating force when operated by a same drive current (or drive voltage, depending on the regulation).

In embodiments, the actuating portion comprises a coupling interface that is configured to cooperate with a coupling end of the functional part, the coupling interface comprising an orifice to allow the actuating element to protrude therethrough.

In embodiments, the coupling interface defines a cylindrical recess in which the coupling end of the functional portion is received, the orifice being centrally arranged in the cylindrical recess.

In embodiments, the cylindrical recess has a diameter that corresponds to the outer diameter of the coupling end of the functional part.

The actuator portion may be partly received in the body recess. In such embodiment, the coupling interface may be in abutment against a shoulder.

The recess of the coupling interface may be surrounded by a peripheral collar, wherein the peripheral collar is in abutment against the shoulder; and the peripheral collar may comprise an outer peripheral groove, in which an annular seal is received. In embodiments, the body of the functional portion comprises, opposite the coupling end, a peripheral groove comprising an annular seal.

In embodiments, the body of the functional portion defines a passageway that comprises the valve arrangement, and the valve member can be moved into a closed or open position by energizing the solenoid arrangement and correspondingly moving the actuating element.

In embodiments, the first and second components are selected from: a shut off valve, a pressure regulating valve, a purge valve, and an oil dosing device. In embodiments, the HRM may include two pressure regulating valves, in particular for application demanding higher hydrogen flow rates.

In embodiments, the common body may further integrate one or more of a filter unit, a pressure relief valve, a heat exchanger device, a temperature sensor and 5 a pressure sensor.

In embodiments, the actuating portion may comprise a mounting flange (which extends radially) by which it is fixed to the common body. This mounting flange may e.g. be screwed to the common body. Also, the mounting flange may be featured with an annular seal (pressed against an outer face of the common body), that provides an outer sealing.

In embodiments, the functional portion is pre-assembled to said actuating portion, for example by crimping, press-fitting, screwing or glueing.

According to another aspect, the invention relates to a hydrogen internal combustion engine comprising an engine block with at least one cylinder and a hydrogen supply system comprising at least one fuel injector for injecting hydrogen into at least one cylinder, and a hydrogen regulation module according to the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

[0003] The present invention will now be described, by way of example, with reference to the accompanying drawings, in which: Fig. 1: is a principle diagram of an embodiment of the present hydrogen regulation module; Fig. 2: is an exemplary perspective view of the hydrogen regulation module of Fig.1; Fig. 3: is a section view through the hydrogen regulation module of Fig.2; Fig.4: is a section view through a component comprising an actuating portion and a functional portion.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Fig.1 is a principle diagram of an embodiment of the present hydrogen regulation module (HRM) 10. The HRM 10 is designed as a module that includes a plurality of components with dedicated functions required for conditioning the hydrogen 5 stream in view of combustion thereof in an internal combustion engine. The HRM comprises a body 12, referred to as common body, which integrates the various components, whereby the common body 12 and components form a single structure. In practice, the common body is configured to accommodate or host the components.

In Fig.1, reference sign 12 designates the common body in which a gas flow path 11 (or channel) is arranged. The flow path 11 extends from an inlet port 14, through which hydrogen enters the HRM 10, to an outlet port 16, through which hydrogen is discharged. In practice, the inlet port 14 is connected via a supply piping to a fuel tank in which hydrogen is stored at pressures in the range of 500 to 700 bars, for example. Inlet port 14 is thus an inlet section of the high-pressure side of the HRM 10.

Hydrogen is discharged from the HRM 10 via outlet port 16 at an operating pressure which may typically be between 20 and 40 bars. The low-pressure hydrogen stream is fed from the outlet port 16 to a fuel rail assembly 18 of the engine which comprises a fuel rail 20 connected to a plurality of fuel injectors 22.

The fuel injectors 22 may be arranged to allow direct injection of hydrogen into the engine cylinders.

The HRM 10 integrates a plurality of components such as e.g. a filter unit 24, a shut off valve 26, a HP regulator 28, a first pressure relief valve PRV 30 and a 25 purge valve 32 The filter unit 24 is configured to retain particles beyond a predetermined particle size. It is arranged on the upstream side of the flow path 11, upstream of the shut off valve 26 and HP regulator 28. The filter unit 24 may typically comprise a filter element having a predetermined mesh size, i.e. with opening of given size, which may e.g. be less than 15, 10 or 8 pm. The filter unit 24 is advantageously designed for an operating pressure of up to about 50 bars and to resist a burst pressure of about 100 bars.

The shut off valve 26 allows to selectively open or close the flow of hydrogen through the gas flow path 11. The purpose of the shut off valve 26 is to sealingly close the incoming flow of hydrogen when not desired, i.e. typically when the engine is down, to avoid flows or leaks of hydrogen to the non-operating engine. The shut off valve 26 is preferably designed as 'normally closed': the valve is closed by default. The shut off valve 26 includes an actuator that allows opening the shut-off valve, i.e. to bring a valve element in an open position away from a valve seat, allowing flow of hydrogen through the valve seat. Such actuator may be of the solenoid type. The valve element may typically be biased in closed position by a spring.

HP regulator 28 is designed to regulate the pressure of the hydrogen stream, i.e. to maintain the pressure within a predetermined pressure range. Preferably, the HP regulator 28 is configured to regulate the pressure downstream of the regulator in a pressure range between 20 and 40 bars. The HP regulator may be of any appropriate design. It may e.g. comprise a valve seat with an orifice that cooperates with a regulator valve member that allows to control the flow cross-section through the regulator orifice. The regulator valve member is actuated via an actuator (e.g. solenoid actuator), by which the position of the valve member relative to the valve seat can be adjusted, and hence the flow cross section adapted.

The first pressure relief valve PRV 30 is a safety component that is designed to open in case the pressure in the hydrogen flow path 11 exceeds a predetermined threshold. The inlet side of pressure relief valve 30 is in communication with the low-pressure side of the hydrogen flow path 11, i.e. downstream of HP regulator 28. The downstream side of the PRV is connected to a venting port 34. PRV 32 may e.g. include a check valve.

The purge valve 32 is positioned downstream of the shut off valve 26 and of the 30 HP regulator 28. The purge valve 32 is arranged in a branch path 36 that connects the hydrogen flow path 11 to the venting port 34. The inlet side of the purge valve 32 is at the pressure of the hydrogen flow path 11. The purge valve 32 may be a normally closed valve (i.e. closed by default) that is selectively controlled to open when it is desired to purge the low-pressure side of the HRM 10. In such case a purge valve electromagnetic actuator is energized to open the purge valve and thereby establish fluid communication between the hydrogen flow path 11 and the venting port 34, hence allowing hydrogen to escape to the environment. Such purging may e.g. be desired after engine shut down, the shut off valve 26 being closed, to purge the low-pressure side. Alternatively, the purge valve may be designed as a normally open valve, which is actuated in closed position by the actuator.

Preferably, the HRM 10 further include a pressure sensor 40 and a temperature sensor 42 accommodated in the common body 12 to sense the hydrogen stream in the flow path 11. Both sensors may communicate with the flow path 11 via a pick-up branch 44. The pressure and temperature sensors 40, 42 can be in a same housing or arranged separately.

In the shown embodiment, HRM 10 includes an optional heat exchanger device 46, which is configured to exchange heat with the common body 12 in order to control the temperature of the hydrogen flow through the flow path 11. In practice a fluid channel can be arranged to extend in the common body 12 and/or in a HEX body attached to the common body 12. A heat-transfer fluid is circulated through channel with an appropriate temperature in order to heat-up or cool down the common body 12 and thus the hydrogen flow through the flow path 11.

For increased safety, the HRM 10 advantageously includes a further pressure relief valve 48 that is designed to open in case the hydrogen pressure in the upstream side exceeds a predetermined threshold. The inlet side of pressure relief valve 48 is in communication with the hydrogen flow path11 upstream of the shut-off valve 26. The downstream side of PRV2 48 is connected to the venting port 34. PRV2 48 may e.g. include a check valve.

Reference sign 50 indicates an optional oil dosing device, which is configured to deliver predetermined amounts of oil into the stream of hydrogen. Such oil dosing device to provide some lubrication to the fuel delivery system components, in particular to the fuel injectors. In the embodiment the oil dosing device is arranged to discharge oil into the hydrogen flow path 11, on the high-pressure side. Alternatively, the oil dosing device can be arranged after the HP regulator 28.

Fig.2 shows a perspective view of a HRM 10' embodying the HRM design principle of Fig.1. Fig.3 is a section view of HRM 10'. The common body 12 is built as a metal bloc with a plurality of recesses 61 that accommodate the various components, the recesses 61 being interconnected by the flow path 11 in the metal bloc 12, as apparent from Fig.3. That is, the recesses have an opening that communicates with flow path 11.

Turning now more specifically to Fig.2, one will recognize an inlet fitting 60 connecting the inlet port 14, whereas an outlet fitting 62 connects the outlet port 16. The components are indicated using the reference signs of Fig.2. Hence common body 12 integrates: the oil dosing device 50, the pressure and temperature sensors 40, 42, the filter 24, the shut off valve 26 and HP regulator 28, the purge valve 32 and the two pressure relief valves 30, 48.

Actually in Fig.2 only the external parts of the components are visible. That is the common electrical connector 41 for the pressure and temperature sensors. For the oil dosing device 50 the connector 50.1 and solenoid actuator 50.2 are visible. Also, an inlet oil piping 64 is visible on the side of the common body 12, to supply oil to the oil dosing device 50.

The shut off valve and HP regulator 26, 28 are here combined as a single component, whereby they are actuated by a single solenoid actuator 27 with connector 29.

As for the purge valve 32, one can see its solenoid actuator 32.1 and its connector 32.2, as well as a purge outlet fitting 33 to collect the purged hydrogen.

Reference sign 66 designates an outlet fitting for the venting port 34 to collect hydrogen released by the PRVs. There is thus a slight difference here with the diagram of Fig.1 where the outlets of the PRVs and purge valve merge in a single outlet port.

The heat exchanger device 46 comprises a plate-like body 67 assembled to the base of the common body 12, to be in contact therewith. The body 67 includes an internal fluid channel 68 for circulating the heat transfer fluid. Reference signs 70 and 71 indicate an inlet and outlet fitting for the internal fluid channel 68. The fluid channel 68 may e.g. have a U shape, with two longitudinal channels 68.1 extending from the respective inlet and outlet fittings and interconnected at the opposite end by a transverse channel 68.2.

The common body 12 is further assembled to a mounting plate 72, which is located opposite the heat exchanger body 67. The mounting plate may have any appropriate shape, which is generally adapted to the fixing location.

It will be appreciated that in the present embodiment, the solenoid actuators of the oil dosing device 50, purge valve 32 and combined shut off and regulator valve 26, 28 are of same design, as will be explained below.

In Fig. 3 one will recognize the oil dosing device 50, the combined shut off valve and HP regulator 26,28 and the purge valve 32. The fuel filter 24 is inserted in flow path 11 in an inlet section thereof. As can be seen, the electro-magnetically actuated components, namely the oil dosing device 50, the combined shut off valve and HP regulator 26, 28 and the purge valve 32 have their actuator portion mainly extending outside of the common body, whereas their functional portion, i.e. the dosing mechanism, the shut-off valve and regulator valve, as well as the purge valve, are arranged in a respective recess in the common body.

The internal, functional portion is typically designed as a unit or cartridge that is configured to provide the desired function. In general, the functional portion comprises at least one valve arrangement having a valve seat surrounding a flow orifice and a valve member that is moveable relative to the valve seat by means of the actuator portion. The functional and actuator portion are designed to cooperate and namely to interact by way of the actuating element of the actuating portion.

This concept is illustrated in Fig.4, which shows a component 80 with an actuator portion 82 and a functional portion 84 configured as simple on/off valve. The functional portion 84 comprises a cylindrical body 84.1 with a flow passage 84.2 having an axial section 84.3, a seat section 84.4 and a transverse section 84.5. The seat section 84.4 comprises a valve seat 84.6 surrounding a flow orifice 84.7 (leading from axial section to transverse section). The valve seat can be opened or closed by means of a valve member 84.8, here a ball-shaped member, that can be selectively actuated by the actuator 82, here via a valve shaft 84.9. Valve shaft 84.9 is axially guided in a bore 84.10 in a body wall 84.11 delimiting the transverse channel 84.5, opposite the axial section 84.3. This side of the body 84.1 forms the coupling end, where the valve shaft is received in an end recess 84.12.

The actuator portion 82 is the external part of the component 80 and comprises, within a housing 82.1, a solenoid coil 82.2 surrounding a movable armature 82.3 that is configured to act on an actuating rod 82.4. Reference sign 82.7 designates an electrical connector with a wiring extending to the coil 82.2. As is known, energizing the coil 82.2 will generate a magnetic field that will move the armature 82.3 in the direction of the arrow towards the functional portion 84, thereby transmitting the actuating force to the functional portion 82 via actuating rod 82.4. Therefore, the actuating rod 82.4 is in axial alignment with the valve shaft 84.9 in the functional portion, which allows displacing valve member 84.8 in the direction of the arrow.

The valve member 84.8 is biased against the valve seat 84.5 (i.e. in closed position) by a spring 84.13 arranged in the axial section, maintained by a hollow screw 84.14 screwed in axial section 84.2.

The actuator portion 82 is likewise of general cylindrical shape, where the housing 82.1 delimits the lateral side 82.5 and top end 82.6. The side facing the functional portion is referred to as coupling interface 86. The coupling interface 86 comprises a cylindrical recess 86.1 surrounded by a peripheral collar 86.2. The recess 86.1 has a central opening 86.3 for the rod 82.4. The coupling interface 86 is configured to cooperate with the coupling end of the functional portion. The internal diameter of recess 86.1 hence corresponds to the external diameter of the body 84.1 at the coupling end, with some clearance.

An internal sealing, towards the gas flow path 11, is provided by means of an annular seal 88 arranged in a peripheral groove 89.

As can be seen in the figures, the actuator portion 82 partly engages recess 61 with the coupling interface, coming into abutment with a shoulder 90. The collar 86.2 has an outer peripheral groove 92, in which an annular seal 94 is received, thereby providing an outer sealing.

As will be appreciated by those skilled in the art, a variety of designs can be envisaged for the functional portion. In the embodiment of Fig.4 the design is basically that of a purge valve, as for component 32. In use, pressurized hydrogen flows in flow path 11. The valve member 84.8 is biased in closing direction by spring 84.13 and can be raised from seat 84.6 by actuating the valve shaft 84.9 via the actuating rod 82.4 (when solenoid 82.2 is energized). This is a normally closed purge valve, but could be designed as a normally open valve. When the valve member 84.8 is open, hydrogen can escape through axial section 84.3 and then through transverse section 84.5, from where is enters into a lateral channel 13 in the common body 12, to escape towards the dedicated purge fitting 33.

In general, the functional portion can be designed to provide any dedicated function. In particular the functional portion may comprise, in the flow passage, a valve arrangement to control the flow away from or towards the flow path 11 in the common body 12. For example, it can control the supply of hydrogen to the flow path 11 or its removal therefrom, or the introduction of a fluid into the stream of hydrogen flowing to path 11.

The actuating portion allows producing an actuating force to actuate a mechanical arrangement within in the functional portion. For example, in case of a valve arrangement, the actuating element of the actuating portion may act on a valve member of the functional portion, in particular via a valve shaft. The valve shaft and the actuating rod could be made in one piece. Alternatively, the functional portion can be designed as a pump, whereby the actuating element of the actuating portion acts upon a piston within a pumping chamber, an outlet valve arrangement of the pumping chamber being configured to open spontaneously when a predetermined pressure is reached in the pumping chamber.

As mentioned, the three components 32, 50 and 26/28 are equipped with an actuating portion of same design. This means here that the actuating portions are identical with respect to: -the coupling interface: using a same design of coupling facilitates the mechanical assembly/coupling to the functional portion the electromagnetic circuit: the electromagnetic circuit is the same, which typically implies a given configuration of the solenoid components: same internal configuration, namely with same coil wiring (same wire and number of turns and same geometry), and same geometry of the components (in particular same geometry of pole piece and/or armature), providing same actuating forces under same drive current (or voltage).

The coupling ends of the respective components are thus likewise designed to cooperate with the coupling interface of the actuating portion.

A single design of actuating portion is thus used, facilitating the assembly and reducing part diversity.

In some embodiments, the electrical connector may be different for each component, in particular for reasons of fool proofing.

In embodiments, the actuating portion may comprise a radial flange (not shown) by which it is screwed to the common body. In such case, in addition or alternatively to seal 94, the flange may be provided with an annular seal (not shown) that is compressed against the surface of the peripheral body.

One may note in Fig.3 that the gas flow path 11 actually comprises two sections. The first section is from the inlet fitting 60 to the combined shut off and pressure regulating valve 26,28. There the gas stream flows (see arrows) through the combined component 26,28, when open, and exits radially from the cylindrical body of the functional part, to reach a second section 11.2, partially shown and in communication with purge valve 32, to reach the outlet fitting 62.

In practice, the HRM, and hence its various components, are designed for an operating pressure of up to about 55 bars. The regulator 28 is preferably 30 configured to regulate the pressure between Pmin=3 bars and Pmax=40 bars.

Materials are selected for operating temperatures between -40 and 125°C and hydrogen compatibility. The upstream PRV 48 is preferably configured to open at a pressure of about 1.5 x Pmax, i.e. about 60-65 bars. The downstream PRV 30 may be configured to open when the pressure downstream of the pressure regulator 28 increases by about 10, 20, or 30% above Pmax, or possibly more.

Claims

CLAIMS1 A hydrogen regulation module for a hydrogen internal combustion engine, wherein the hydrogen regulation module (10) comprises a common body (12) that defines therein a gas flow path (11) for a hydrogen stream, said gas flow path extending from an inlet port (14) to an outlet port (16), said common body integrating at least a first and a second component comprising each: a functional portion (84) with a valve arrangement having a valve seat (84.6) with an orifice that can be opened or closed by a moveable valve member (84.8); an actuator portion (82) comprising a solenoid arrangement (82.2) configured to move an actuating element (82.4); wherein the functional portion and actuator portion are configured to cooperate such that energizing said solenoid arrangement of said actuator portion allows moving the actuating element and interact with said functional portion wherein the functional portion is arranged in a recess (61) in said common body, said recess opening into the gas flow path (11) and said actuator portion is arranged at least in part outside of said common body; wherein the actuating portions of said first and second components are of same design.
2 The hydrogen regulation module according to claim 1, wherein the actuating portion of said first and second components comprises a solenoid coil and armature of same design, whereby both actuating portions deliver the same actuating force when operated by a same drive voltage/current.
3 The hydrogen regulation module according to claim 1, 2, wherein the actuating portion comprises a coupling interface (86) that is configured to cooperate with a coupling end of the functional part, the coupling interface comprising an orifice (86.3) to allow the actuating element to protrude therethrough.
4 The hydrogen regulation module according to claim 3, wherein the coupling interface defines a cylindrical recess (86.1) in which the coupling end of said functional portion is received, said orifice being (86.3) centrally arranged in said cylindrical recess.
5 The hydrogen regulation module according to claim 4, wherein said cylindrical recess has a diameter that corresponds to the outer diameter of said coupling end of said functional part.
6 The hydrogen regulation module according to any of claims 3 to 5, wherein said actuator portion is partly received in said body recess (61), said coupling interface (86) being in abutment against a shoulder (90).
7 The hydrogen regulation module according to claim 7, wherein said recess (86.1) of said coupling interface is surrounded by a peripheral collar (86.2), wherein said peripheral collar is in abutment against said shoulder; and said peripheral collar comprises an outer peripheral groove (92), in which an annular seal (94) is received
8. The hydrogen regulation module according to any one of claims 4 to 8, wherein said body of said functional portion comprises, opposite said coupling end, a peripheral groove (89) comprising an annular seal (88).
9. The hydrogen regulation module according to any one of the preceding claims, wherein said body of said functional portion defines a passageway that comprises said valve arrangement, and wherein said valve member can be moved into a closed or open position by energizing said solenoid arrangement and correspondingly moving said actuating element.
10 The hydrogen regulation module according to any one of the preceding claims, wherein said first and second components are selected from: a shut off valve, a pressure regulating valve, a purge valve, and an oil dosing device.
11 The hydrogen regulation module according to any one of the preceding claims, wherein said common body further integrates one or more of a filter unit, a pressure relief valve, a heat exchanger device, a temperature sensor and a pressure sensor.
12 The hydrogen regulation module according to any one of the preceding claims, wherein said actuating portion comprises a mounting flange by which it is fixed to said common body.
13 The hydrogen regulation module according to any one of the preceding claims, wherein said functional portion is pre-assembled to said actuating portion, for example by crimping, press-fitting, screwing or gluing.
14 A hydrogen internal combustion engine comprising an engine block with at least one cylinder and a hydrogen supply system comprising at least one fuel injector for injecting hydrogen into said at least one cylinder, and a hydrogen regulation module according to any one of the preceding claims.