CN117329029A - Dual fuel injector, engine system and vehicle - Google Patents

Abstract

The invention discloses a dual-fuel injector, an engine system and a vehicle, wherein a first control oil cavity channel, a second control oil cavity channel, a hydrogen gas cavity channel, a liquid ammonia cavity channel and a control oil inlet are arranged in an injector body of the dual-fuel injector, the control oil inlet is communicated with the first control oil cavity channel through a first electromagnetic valve, and the control oil inlet is respectively communicated with the first control oil cavity channel and the second control oil cavity channel through a second electromagnetic valve; in the nozzle assembly, a hydrogen needle valve is positioned in a needle valve body, and a liquid ammonia needle valve is positioned in the hydrogen needle valve; a hydrogen spraying cavity is arranged between the needle valve body and the hydrogen needle valve, the hydrogen spraying cavity is communicated with a hydrogen cavity channel, and the needle valve body further comprises a hydrogen spray hole; a liquid ammonia spraying cavity is arranged between the hydrogen needle valve and the liquid ammonia needle valve, the liquid ammonia spraying cavity is communicated with a liquid ammonia cavity channel, and the hydrogen needle valve further comprises liquid ammonia spray holes; the control piston is arranged along the axial direction with the nozzle assembly, one end of the control piston is fixedly connected with the liquid ammonia needle valve, and the other end of the control piston is positioned in the first control oil cavity channel.

Description

Dual fuel injector, engine system and vehicle

Technical Field

The invention relates to the technical field of automobile internal combustion engines, in particular to a dual fuel injector, an engine system and a vehicle.

Background

In recent years, environmental problems have become more prominent, and development of alternative fuel technologies has become more and more important. Ammonia is an ideal chemical energy storage medium, carbon atoms are not contained in ammonia molecules, no greenhouse gas emission is generated during combustion, and ammonia has higher energy density, can be liquefied at normal temperature and pressure of 9.9bar or normal pressure and temperature of-33.4 ℃, and is beneficial to reducing high cost and potential safety risk caused by using high-pressure resistant equipment. However, ammonia also has some significant problems such as low laminar flame speed, high ignition energy, large latent heat of vaporization, etc. Hydrogen is currently considered an excellent combustion promoter, which itself is likewise free of carbon. Hydrogen has a relatively high laminar flame speed and relatively low ignition energy, and hydrogen is suitable for use as a pilot fuel.

In the prior art, when the injector controls injection of different fuels, a plurality of control components may be required to operate simultaneously, increasing control complexity, and in addition, the fuel injected in the injector generally comprises carbon-containing fuel, and carbon-containing substances released by the carbon-containing fuel during combustion pollute the environment.

Disclosure of Invention

The invention provides a dual-fuel injector, an engine system and a vehicle, which are used for simplifying the structural control mode of the dual-fuel injector and realizing zero carbon emission.

In a first aspect, the present invention provides a dual fuel injector comprising:

the injection body is internally provided with a first control oil cavity channel, a second control oil cavity channel, a hydrogen cavity channel, a liquid ammonia cavity channel and a control oil inlet;

a first solenoid valve through which the control oil inlet communicates with the first control oil gallery;

the control oil inlet is respectively communicated with the first control oil cavity channel and the second control oil cavity channel through a second electromagnetic valve;

the nozzle assembly comprises a needle valve body, a hydrogen needle valve and a liquid ammonia needle valve; the hydrogen needle valve is positioned in the needle valve body, and the liquid ammonia needle valve is positioned in the hydrogen needle valve; a hydrogen gas spraying cavity is arranged between the needle valve body and the hydrogen gas needle valve, the hydrogen gas spraying cavity is communicated with the hydrogen gas cavity channel, and the needle valve body further comprises a hydrogen gas spraying hole; a liquid ammonia spraying cavity is arranged between the hydrogen needle valve and the liquid ammonia needle valve, the liquid ammonia spraying cavity is communicated with the liquid ammonia cavity channel, and the hydrogen needle valve further comprises a liquid ammonia spraying hole;

The control piston is arranged along the axial direction with the nozzle assembly, one end of the control piston is fixedly connected with the liquid ammonia needle valve, and the other end of the control piston is positioned in the first control oil cavity channel;

when the first electromagnetic valve is opened, control oil at the control oil inlet enters the first control oil cavity channel through the first electromagnetic valve, the control oil pressure in the first control oil cavity channel is discharged through the first electromagnetic valve, so that the control piston moves along one side of the nozzle assembly, which is close to the first control oil cavity channel, and drives the liquid ammonia needle valve to act, and the liquid ammonia cavity channel is communicated with the liquid ammonia spray hole through the liquid ammonia spray cavity;

when the second electromagnetic valve is opened, control oil at the control oil inlet enters the first control oil cavity channel and the second control oil cavity channel respectively through the second electromagnetic valve, the control oil pressure in the first control oil cavity channel and the control oil pressure in the second control oil cavity channel are discharged respectively through the second electromagnetic valve, so that the control piston moves along one side, close to the first control oil cavity channel, of the nozzle assembly, and drives the liquid ammonia needle valve and the hydrogen needle valve to synchronously act, and the hydrogen cavity channel is communicated with the hydrogen spray hole through the hydrogen spray cavity.

Optionally, the dual fuel injector further comprises: a movable ejector rod;

the control piston is fixedly connected with the liquid ammonia needle valve through the movable ejector rod.

Optionally, the dual fuel injector further comprises: an oil control elastic seat, a hydrogen spraying return elastic piece, a hydrogen spraying lift limit block and an ammonia spraying return elastic piece;

the oil control elastic seat is fixedly connected with the hydrogen needle valve, the hydrogen injection lift limiting block is fixedly connected with the injection body, and the hydrogen injection lift limiting block is positioned at one side of the oil control elastic seat, which is away from the hydrogen needle valve;

the second control oil cavity is arranged between the hydrogen spraying lift limiting block and the oil control elastic seat, the hydrogen spraying return elastic piece is arranged in the second control oil cavity, one end of the hydrogen spraying return elastic piece abuts against one side surface of the hydrogen spraying lift limiting block, which is close to the second control oil cavity, and the other end of the hydrogen spraying return elastic piece abuts against one side surface of the oil control elastic seat, which is close to the second control oil cavity; the hydrogen spraying lift limiting block and the hydrogen spraying return elastic piece are used for limiting the displacement of the oil control elastic seat along the axial direction.

The ammonia spraying return elastic piece is positioned between the movable ejector rod and the control piston, one end of the ammonia spraying return elastic piece is propped against the surface of one side of the control piston, which is close to the movable ejector rod, and the other end of the ammonia spraying return elastic piece is propped against the surface of one side of the movable ejector rod, which is close to the control piston.

Optionally, the dual fuel injector further comprises: spraying ammonia to regulate the pressure gasket;

the ammonia spraying pressure regulating gasket is arranged between the control piston and the movable ejector rod and used for limiting the displacement of the movable ejector rod along the axial direction.

Optionally, the dual fuel injector further comprises: the first control cavity channel, the second control cavity channel, the third control cavity channel, the fourth control cavity channel, the fifth control cavity channel and the sixth control cavity channel;

one end of the first control cavity is communicated with the control oil inlet, and the other end of the first control cavity is communicated with the first control oil cavity through the first electromagnetic valve;

one end of the fourth control cavity is communicated with the control oil inlet, and the other end of the fourth control cavity is communicated with the third control cavity through the second electromagnetic valve;

the second control cavity is communicated with the third control cavity, the fifth control cavity and the sixth control cavity respectively, and the first control cavity is communicated with the fifth control cavity.

Optionally, the extending direction of the first control channel is parallel to the extending direction of the second control channel; the extending direction of the third control cavity is parallel to the extending direction of the fourth control cavity; the extending direction of the sixth control chamber is parallel to the extending direction of the control piston.

Optionally, the dual fuel injector further comprises: tightening the cap by screw threads;

the screw thread tightening cap is respectively connected with the injection body and the needle valve body and is used for fixing the needle valve body on the injection body.

In a second aspect, the present invention provides an engine system comprising: a hydrogen storage tank, a liquid ammonia storage tank, a control oil storage tank, a compound pump and the dual fuel injector of the second aspect;

the compound pump is respectively communicated with the liquid ammonia storage tank and the control oil storage tank; the compound pump is used for providing the liquid ammonia in the liquid ammonia storage tank into a liquid ammonia channel of the dual-fuel injector, and/or the compound pump is used for providing the control oil in the control oil storage tank to a control oil inlet of the dual-fuel injector;

the hydrogen storage tank is communicated with a hydrogen cavity channel of the dual-fuel injector, and the dual-fuel injector is used for injecting the hydrogen and the liquid ammonia.

Optionally, the liquid ammonia storage tank and the control oil storage tank form a composite storage tank.

Optionally, the engine system further comprises: a combustion cylinder, a cover, and a spark plug located in the cover;

the combustion cylinder comprises a combustion cavity and a movable piston;

The cover includes a first opening and a second opening to enable an electrode of the spark plug to extend into the combustion chamber through the first opening, and to enable a hydrogen orifice and a liquid ammonia orifice of the dual fuel injector to extend into the combustion chamber through the second opening;

and when the hydrogen and the liquid ammonia are combusted in the combustion cavity, the movable piston is pushed to move in the combustion cylinder.

In a third aspect, the present invention provides a vehicle comprising the engine system of the second aspect.

According to the technical scheme provided by the invention, the control oil can enter the first control oil cavity channel and the second control oil cavity channel in the dual-fuel injector, the hydrogen gas can enter the hydrogen gas cavity channel and the hydrogen gas spraying cavity, and the liquid ammonia can enter the liquid ammonia cavity channel and the liquid ammonia spraying cavity, so that the dual-fuel injector can spray hydrogen and liquid ammonia, and meanwhile, the control oil can not be sprayed, and zero carbon emission is realized; the position state of the liquid ammonia needle valve can be controlled by controlling the pressure of control oil in the first control oil cavity channel through the first electromagnetic valve, so that the liquid ammonia is injected by the dual-fuel injector, the pressure of the control oil in the first control oil cavity channel and the second control oil cavity channel is controlled through the second electromagnetic valve, the position states of the liquid ammonia needle valve and the hydrogen needle valve can be controlled to enable the dual-fuel injector to inject hydrogen, so that the hydrogen or ammonia can be injected by the dual-fuel injector only by controlling the opening states of the first electromagnetic valve and the second electromagnetic valve, the control is convenient, the hydrogen needle valve and the liquid ammonia needle valve are both positioned at positions of the dual-fuel injector close to the hydrogen injection hole and the liquid ammonia injection hole, the dead volume of the hydrogen or the liquid ammonia in the dual-fuel injector is reduced, the injection pressure of the hydrogen or the liquid ammonia is favorably improved, the power of an engine is favorably improved, the utilization rate of the hydrogen and the liquid ammonia is favorably improved, the use cost is reduced, and the first electromagnetic valve and the second electromagnetic valve are both provided with external electromagnetic valves, so that the dual-fuel injector has better heat dissipation performance, the design difficulty is reduced, and the structure is simple; in addition, when the device is applied to an engine, only a hydrogen gas, liquid ammonia and control oil supply device and an ignition device are required to be added in the existing engine system, and the hydrogen gas supply, the liquid ammonia supply and the ignition device and the control oil supply device are not interfered with each other, so that the device is high in reliability and easy to realize.

Drawings

FIG. 1 is a schematic diagram of a dual fuel injector according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of area A of FIG. 1;

FIG. 3 is an enlarged schematic view of region B of FIG. 1;

FIG. 4 is a schematic diagram of an engine system according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of another engine system according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of another engine system according to an embodiment of the present disclosure;

wherein reference numerals are as follows:

01. a dual fuel injector; 16. a spray body; 22. a first control oil gallery; 23. a second control oil gallery; 17. a hydrogen gas channel; 5. a liquid ammonia channel; 3. a control oil inlet; 15. a first electromagnetic valve; 2. a second electromagnetic valve; 30. a nozzle assembly; 11. a needle valve body; 10. a hydrogen needle valve; 12. a liquid ammonia needle valve; 24. a hydrogen gas injection chamber; 21. a hydrogen jet orifice; 25. a liquid ammonia spraying cavity; 13. liquid ammonia spraying holes; 4. a control piston; x, axial direction; 19. a movable ejector rod; 8. an oil control elastic seat; 20. a hydrogen spraying return elastic piece; 7. a hydrogen spraying lift limit block; 6. an ammonia spraying return elastic piece; 18. spraying ammonia to regulate the pressure gasket; 41. a first control channel; 42. a second control channel; 43. a third control channel; 44. a fourth control channel; 45. a fifth control channel; 46. a sixth control channel; 9. tightening the cap by screw threads; 51. a hydrogen storage tank; 52. a liquid ammonia storage tank; 53. controlling an oil storage tank; 54. a compound pump; 55. a composite storage tank; 80. a combustion cylinder; 60. a cover cap; 70. a spark plug; 81. a combustion chamber; 82. moving the piston; 61. a first opening; 62. a second opening; 91. a high pressure hydrogen rail; 92. a high pressure liquid ammonia rail; 93. high pressure control oil rail; 94. and a control module.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

Fig. 1 is a schematic structural view of a dual fuel injector according to an embodiment of the present invention, fig. 3 is an enlarged schematic view of a region B in fig. 1, and referring to fig. 1 and 3, the dual fuel injector 01 includes an injection body 16, a first solenoid valve 15, a second solenoid valve 2, a nozzle assembly 30, and a control piston 4. A first control oil cavity channel 22, a second control oil cavity channel 23, a hydrogen cavity channel 17, a liquid ammonia cavity channel 5 and a control oil inlet 3 are arranged in the injection body 16; a first solenoid valve 15, the control oil inlet 3 being in communication with the first control oil gallery channel 22 via the first solenoid valve 15; a second solenoid valve 2, the control oil inlet 3 is respectively communicated with the first control oil chamber channel 22 and the second control oil chamber channel 23 through the second solenoid valve 2; the nozzle assembly 30 includes a needle valve body 11, a hydrogen needle valve 10, and a liquid ammonia needle valve 12; the hydrogen needle valve 10 is positioned in the needle valve body 11, and the liquid ammonia needle valve 12 is positioned in the hydrogen needle valve 10; a hydrogen injection cavity 24 is arranged between the needle valve body 11 and the hydrogen needle valve 10, the hydrogen injection cavity 24 is communicated with the hydrogen cavity channel 17, and the needle valve body 11 also comprises a hydrogen spray hole 21; a liquid ammonia spraying cavity 25 is arranged between the hydrogen needle valve 10 and the liquid ammonia needle valve 12, the liquid ammonia spraying cavity 25 is communicated with the liquid ammonia cavity channel 5, and the hydrogen needle valve 10 also comprises a liquid ammonia spraying hole 13; the control piston 4, the control piston 4 and the nozzle assembly 30 are arranged along the axial direction, one end of the control piston 4 is fixedly connected with the liquid ammonia needle valve 12, and the other end of the control piston 4 is positioned in the first control oil cavity channel 22.

When the first electromagnetic valve 15 is opened, control oil of the control oil inlet 3 enters the first control oil cavity channel 22 through the first electromagnetic valve 15, the control oil pressure in the first control oil cavity channel 22 is discharged through the first electromagnetic valve 15, so that the control piston 4 moves along one side of the nozzle assembly 30, which is close to the first control oil cavity channel 22, and drives the liquid ammonia needle valve 12 to act, and the liquid ammonia cavity channel 5 is communicated with the liquid ammonia spray hole 13 through the liquid ammonia spray cavity 25; when the second electromagnetic valve 2 is opened, the control oil of the control oil inlet 3 respectively enters the first control oil cavity channel 22 and the second control oil cavity channel 23 through the second electromagnetic valve 2, the control oil pressure in the first control oil cavity channel 22 and the control oil pressure in the second control oil cavity channel 23 are respectively discharged through the second electromagnetic valve 2, so that the control piston 4 moves along one side of the nozzle assembly 30, which is close to the first control oil cavity channel 22, and drives the liquid ammonia needle valve 12 and the hydrogen needle valve 10 to synchronously act, and the hydrogen cavity channel 17 is communicated with the hydrogen spray hole 21 through the hydrogen spray cavity 24.

It should be noted that the hydrogen gas chamber 17 is used for filling hydrogen gas, the liquid ammonia chamber 5 is used for filling liquid ammonia, the control oil inlet 3 is used for filling control oil, the control oil can enter the first control oil chamber 22 through the first electromagnetic valve 15 when the first electromagnetic valve 15 is opened, and enter the first control oil chamber 22 and the second control oil chamber 23 through the second electromagnetic valve 2 when the second electromagnetic valve 2 is opened, and the auxiliary dual fuel injector 01 works. The control oil includes, but is not limited to, diesel fuel and the like, and it should be noted that the control oil is not emitted from the dual fuel injector 01 and does not participate in combustion. The manner of fixedly connecting one end of the control piston 4 with the liquid ammonia needle valve 12 may be set according to actual needs, for example, may be threaded connection, or may be other, and is not particularly limited herein.

Specifically, when the first electromagnetic valve 15 is opened, the control oil of the control oil inlet 3 enters the first control oil cavity channel 22 through the first electromagnetic valve 15, the control oil pressure in the first control oil cavity channel 22 is released through the first electromagnetic valve 15, the pressure in the first control oil cavity channel 22 is reduced, when the pressure of the high-pressure control oil in the first control oil cavity channel 22 is reduced to be smaller than the pressure of the high-pressure liquid ammonia in the liquid ammonia spraying cavity 25, the control piston 4 can move along one side, close to the first control oil cavity channel 22, of the nozzle assembly 30 under the action of the high-pressure liquid ammonia in the liquid ammonia spraying cavity 25, and drives the liquid ammonia needle valve 12 to act, and at the moment, the liquid ammonia spraying hole 13 on the hydrogen needle valve 10 is in a communicating state with the liquid ammonia spraying cavity 25, and the liquid ammonia in the liquid ammonia cavity channel 5 can be sprayed out by the liquid ammonia spraying hole 13 through the liquid ammonia spraying cavity 25; when the first electromagnetic valve 15 is closed, the control oil of the control oil inlet 3 still enters the first control oil cavity channel 22 through the first electromagnetic valve 15, but the control oil pressure in the first control oil cavity channel 22 cannot be discharged through the first electromagnetic valve 15, the pressure in the first control oil cavity channel 22 gradually rises, the control piston 4 gradually falls back to the initial position under the pressure of the high-pressure control oil in the first control oil cavity channel 22 and drives the liquid ammonia needle valve 12 to reset, at the moment, the liquid ammonia spray hole 13 on the hydrogen needle valve 10 is blocked by the liquid ammonia needle valve 12, the liquid ammonia spray cavity 25 and the liquid ammonia spray hole 13 are in a non-communication state, the liquid ammonia in the liquid ammonia cavity channel 5 cannot be sprayed out by the liquid ammonia spray hole 13 through the liquid ammonia spray cavity 25, and the dual-fuel injector 01 stops spraying the liquid ammonia.

Correspondingly, when the second electromagnetic valve 2 is opened, control oil of the control oil inlet 3 enters the first control oil cavity channel 22 and the second control oil cavity channel 23 respectively through the second electromagnetic valve 2, the control oil pressure in the first control oil cavity channel 22 and the control oil pressure in the second control oil cavity channel 23 are released respectively through the second electromagnetic valve 2, the pressure in the first control oil cavity channel 22 and the pressure in the second control oil cavity channel 23 are reduced, when the pressure of high-pressure control oil in the first control oil cavity channel 22 is reduced to be smaller than the pressure of high-pressure liquid ammonia in the liquid ammonia spraying cavity 25, and the pressure of high-pressure control oil in the second control oil cavity channel 23 is reduced to be smaller than the pressure of high-pressure hydrogen in the hydrogen spraying cavity 24, the control piston 4 and the hydrogen needle 10 move along one side of the nozzle assembly 30, close to the first control oil cavity channel 22, and the hydrogen needle valve 12 and the hydrogen needle 10 synchronously act at the moment, the pressure on the hydrogen needle valve 13 is continuously blocked by the needle 12, so that the pressure in the liquid ammonia cavity channel 5 cannot be reduced to be smaller than the pressure of the liquid ammonia spraying cavity 25 and the liquid ammonia 13, and the high-pressure control oil cavity 10 is relatively reduced to be smaller than the pressure of the high-pressure hydrogen gas in the hydrogen spraying cavity 24, and the hydrogen valve body 24 is relatively sprayed by the needle valve body 21; when the second electromagnetic valve 2 is closed, the control oil of the control oil inlet 3 still enters the first control oil cavity channel 22 and the second control oil cavity channel 23 through the second electromagnetic valve 2, but the control oil pressure in the first control oil cavity channel 22 and the second control oil cavity channel 23 cannot be discharged through the second electromagnetic valve 2, the pressure in the first control oil cavity channel 22 and the second control oil cavity channel 23 gradually rises, the control piston 4 gradually falls back to the initial position under the pressure of the high-pressure control oil in the first control oil cavity channel 22 and drives the liquid ammonia needle valve 12 to reset, the hydrogen needle valve 10 gradually falls back to the initial position under the pressure of the high-pressure control oil in the second control oil cavity channel 23, the hydrogen spray hole 21 on the needle valve body 11 is blocked by the hydrogen needle valve 10, the hydrogen spray hole 24 and the hydrogen spray hole 21 are in a non-communication state, the hydrogen in the hydrogen cavity channel 17 cannot be sprayed out by the hydrogen spray hole 21 through the hydrogen spray hole 24, and the dual-fuel injector 01 stops spraying the hydrogen. In this way, the first electromagnetic valve 15 and the second electromagnetic valve 2 can be controlled to be opened in a time-sharing manner, so that the dual-fuel injector 01 can inject hydrogen or liquid ammonia according to actual needs, and the practicability of the dual-fuel injector 01 is improved.

It can be understood that the injection sequence of the hydrogen and the liquid ammonia can be set according to the characteristics of the hydrogen and the liquid ammonia and the actual needs, and the hydrogen has the characteristics of high laminar flame speed and low minimum ignition energy, so that the hydrogen can be used as an ignition accelerator; the liquid ammonia has the characteristics of low laminar flame speed, high ignition energy, large vaporization latent heat and the like. By way of example, the dual fuel injector 01 can be controlled to inject high-pressure hydrogen into the combustion cavity and burn in the combustion cavity, then the dual fuel injector 01 is controlled to stop injecting high-pressure hydrogen and inject high-pressure liquid ammonia, and the high-pressure liquid ammonia is ignited by the jet of the burnt hydrogen so as to improve the combustion efficiency of the liquid ammonia; in addition, no matter the hydrogen burns or the liquid ammonia burns, no carbide emission substance is produced, and zero carbon emission is realized.

According to the technical scheme provided by the embodiment of the invention, the control oil can enter the first control oil cavity channel and the second control oil cavity channel in the dual-fuel injector, the hydrogen can enter the hydrogen cavity channel and the hydrogen spraying cavity, and the liquid ammonia can enter the liquid ammonia cavity channel and the liquid ammonia spraying cavity, so that the dual-fuel injector can spray hydrogen and liquid ammonia, and meanwhile, the control oil can not be sprayed, and zero carbon emission is realized; the position state of the liquid ammonia needle valve can be controlled by controlling the pressure of control oil in the first control oil cavity channel through the first electromagnetic valve, so that the liquid ammonia is injected by the dual-fuel injector, the pressure of the control oil in the first control oil cavity channel and the second control oil cavity channel is controlled through the second electromagnetic valve, the position states of the liquid ammonia needle valve and the hydrogen needle valve can be controlled to enable the dual-fuel injector to inject hydrogen, so that the hydrogen or ammonia can be injected by the dual-fuel injector only by controlling the opening states of the first electromagnetic valve and the second electromagnetic valve, the control is convenient, the hydrogen needle valve and the liquid ammonia needle valve are both positioned at positions of the dual-fuel injector close to the hydrogen injection hole and the liquid ammonia injection hole, the dead volume of the hydrogen or the liquid ammonia in the dual-fuel injector is reduced, the injection pressure of the hydrogen or the liquid ammonia is favorably improved, the power of an engine is favorably improved, the utilization rate of the hydrogen or the liquid ammonia is favorably improved, the use cost is reduced, the first electromagnetic valve and the second electromagnetic valve are both externally arranged, and the dual-fuel injector has better heat dissipation performance, and the design difficulty of the dual-fuel injector is reduced, and the structure is simple; in addition, when the device is applied to an engine, only a hydrogen gas, liquid ammonia and control oil supply device and an ignition device are required to be added in the existing engine system, and the hydrogen gas supply, the liquid ammonia supply and the ignition device and the control oil supply device are not interfered with each other, so that the device is high in reliability and easy to realize.

Optionally, referring to fig. 1 and 3, dual fuel injector 01 also includes a movable ram 19; the control piston 4 is fixedly connected with the liquid ammonia needle valve 12 through a movable ejector rod 19.

The fixed connection manner of the control piston 4 and the movable ejector rod 19, and the fixed connection manner of the liquid ammonia needle valve 12 and the movable connecting rod 19 may be set according to actual needs, for example, may be threaded connection, or may be other, and are not limited herein. Illustratively, the control piston 4, the movable ejector rod 19 and the liquid ammonia needle valve 12 can be processed separately, so that the controllability of the matching fixation is improved.

Specifically, by arranging the movable ejector rod 19 between the control piston 4 and the liquid ammonia needle valve 12, control oil in the first control oil cavity 22 can be prevented from entering the liquid ammonia spraying cavity 25 through the control piston 4 and the liquid ammonia needle valve 12, and the reliability of zero carbon emission is improved.

Optionally, referring to fig. 1 and 3, the dual fuel injector 01 further includes an oil control elastic seat 8, a hydrogen injection return elastic member 20, a hydrogen injection lift stopper 7, and an ammonia injection return elastic member 6; the oil control elastic seat 8 is fixedly connected with the hydrogen needle valve 10, the hydrogen injection lift limiting block 7 is fixedly connected with the injection body 16, and the hydrogen injection lift limiting block 7 is positioned at one side of the oil control elastic seat 8, which is away from the hydrogen needle valve 10.

The fixed connection manner of the oil control elastic seat 8 and the hydrogen needle valve 10, and the fixed connection manner of the hydrogen injection lift limit block 7 and the injection body 16 may be set according to actual needs, for example, may be threaded connection, or may be other, which is not limited herein. The hydrogen injection return elastic member 20 and the ammonia injection return elastic member 6 include elastic members such as springs, and may be provided as needed, and are not particularly limited herein.

The second control oil cavity channel 23 is arranged between the hydrogen spraying lift limiting block 7 and the oil control elastic seat 8, the hydrogen spraying return elastic piece 20 is arranged in the second control oil cavity channel 23, one end of the hydrogen spraying return elastic piece 20 abuts against the surface of one side, close to the second control oil cavity channel 23, of the hydrogen spraying lift limiting block 7, and the other end of the hydrogen spraying return elastic piece 20 abuts against the surface of one side, close to the second control oil cavity channel 23, of the oil control elastic seat 8; the hydrogen spraying lift limiting block 7 and the hydrogen spraying return elastic piece 20 are used for limiting the displacement amount of the oil control elastic seat 8 along the axial direction X. The ammonia spraying return elastic piece 6 is positioned between the movable ejector rod 19 and the control piston 4, one end of the ammonia spraying return elastic piece 6 is propped against the surface of one side of the control piston 4, which is close to the movable ejector rod 19, and the other end of the ammonia spraying return elastic piece 6 is propped against the surface of one side of the movable ejector rod 19, which is close to the control piston 4.

Specifically, when the second electromagnetic valve 2 is opened, the pressure of the control oil in the first control oil cavity 22 and the pressure of the control oil in the second control oil cavity 23 are reduced, the hydrogen injection return elastic member 20 compresses along one side of the oil control elastic seat 8, which is close to the hydrogen injection lift limiting block 7, at this time, the oil control elastic seat 8 drives the liquid ammonia needle valve 12 to move along one side of the nozzle assembly 30, which is close to the first control oil cavity 22, and simultaneously, the pressure of the control oil in the first control oil cavity 22 is reduced so that the control piston 4 moves along one side of the nozzle assembly 30, which is close to the first control oil cavity 22, the ammonia injection return elastic member 6 compresses to drive the movable ejector rod 19 and the hydrogen needle valve 10 to move along one side of the nozzle assembly 30, which is close to the first control oil cavity 22, wherein the liquid ammonia needle valve 12 and the hydrogen needle valve 10 synchronously move, so that the liquid ammonia cavity 5 and the liquid ammonia spray hole 13 cannot be communicated, and in the process, the dual fuel injector 01 can only spray hydrogen; when the second electromagnetic valve 2 is closed, the pressure of the control oil in the first control oil cavity channel 22 and the pressure of the control oil in the second control oil cavity channel 23 are gradually increased, the hydrogen injection return elastic piece 20 is reset along one side of the oil control elastic seat 8, which is close to the hydrogen injection lift limiting block 7, at the moment, the oil control elastic seat 8 drives the liquid ammonia needle valve 12 to move along one side of the first control oil cavity channel 22, which is close to the nozzle assembly 30, meanwhile, the pressure of the control oil in the first control oil cavity channel 22 is gradually increased, so that the control piston 4 moves along one side of the first control oil cavity channel 22, which is close to the nozzle assembly 30, and the ammonia injection return elastic piece 6 is reset to drive the movable ejector rod 19 and the hydrogen needle valve 10 to move along one side of the first control oil cavity channel 22, which is close to the nozzle assembly 30, and at the moment, the dual-fuel injector 01 cannot inject hydrogen and liquid ammonia. In this way, by arranging the oil control elastic seat 8, the hydrogen injection return elastic member 20, the hydrogen injection lift limit block 7 and the ammonia injection return elastic member 6, when the first electromagnetic valve 15 or the second electromagnetic valve 2 is closed, the liquid ammonia needle valve 12 and/or the hydrogen needle valve 10 can be reset in time, so that the dual-fuel injector 01 can work normally when hydrogen or liquid ammonia is injected next time, and the reliability of the dual-fuel injector 01 is improved.

It will be appreciated that the above description is given by way of example only of the operation of the second solenoid valve 2 when it is opened and closed, and reference is made to the above description of the operation of the first solenoid valve 15 when it is opened and closed, and this will not be repeated here.

Optionally, referring to fig. 1 and 3, dual fuel injector 01 further includes an ammonia injection pressure regulating shim 18; the ammonia spraying pressure regulating gasket 18 is arranged between the control piston 4 and the movable ejector rod 19, and the ammonia spraying pressure regulating gasket 18 is used for limiting the displacement of the movable ejector rod 19 along the axial direction X.

The ammonia injection pressure regulating pad 18 may be pressed against the injection body 16, or may be other, and is not particularly limited herein.

Specifically, when the first electromagnetic valve 15 is opened, the pressure of the control oil in the first control oil channel 22 is reduced, the control piston 4 moves along one side of the nozzle assembly 30, which is close to the first control oil channel 22, if the ammonia injection pressure regulating gasket 18 is not arranged, the displacement of the movable ejector rod 19 for driving the liquid ammonia needle valve 12 to move along the axial direction X can be continuously increased, so that the injection rate of liquid ammonia is not easy to control; the responsiveness and stability of the dual-fuel injector 01 for injecting the liquid ammonia are further adjusted by arranging the ammonia injection pressure regulating gasket 18 with proper thickness so as to adjust the moving lift of the movable ejector rod 19 to drive the liquid ammonia needle valve 12 to the side of the first control oil cavity channel 22.

Optionally, fig. 2 is an enlarged schematic view of region a in fig. 1, referring to fig. 1 and 2, dual fuel injector 01 further includes a first control chamber channel 41, a second control chamber channel 42, a third control chamber channel 43, a fourth control chamber channel 44, a fifth control chamber channel 45, and a sixth control chamber channel 46; one end of the first control chamber channel 41 is communicated with the control oil inlet 3, and the other end of the first control chamber channel 41 is communicated with the first control oil chamber channel 22 through the first electromagnetic valve 15; one end of the fourth control chamber 44 is communicated with the control oil inlet 3, and the other end of the fourth control chamber 44 is communicated with the third control chamber 43 through the second electromagnetic valve 2; the second control gallery 42 communicates with a third control gallery 43, a fifth control gallery 45, and a sixth control gallery 46, respectively, and the first control gallery 22 communicates with the fifth control gallery 45.

Specifically, by arranging the first control channel 41, when the first electromagnetic valve 15 is opened and the second electromagnetic valve 2 is closed, the control oil entering from the control oil inlet 3 can reach the first control oil channel 22 through the first control channel 41, and the pressure of the first control oil channel 22 can be discharged through the first electromagnetic valve 15, so that the pipeline is simple to set and convenient to control; by providing the second control chamber passage 42, the third control chamber passage 43, the fourth control chamber passage 44, the fifth control chamber passage 45, and the sixth control chamber passage 46, so that when the second solenoid valve 2 is opened and the first solenoid valve 15 is closed, the control oil introduced from the control oil inlet 3 can reach the first control oil chamber passage 22 through the fourth control chamber passage 44, the third control chamber passage 43, the second control chamber passage 42, and the fifth control chamber passage 45, and reach the second control oil chamber passage 23 through the fourth control chamber passage 44, the third control chamber passage 43, the second control chamber passage 42, and the sixth control chamber passage 46, and the pressures of the first control oil chamber passage 22 and the second control oil chamber passage 23 can be released through the second solenoid valve 2, so that the pressures of the first control oil chamber passage 22 and the second control oil chamber passage 23 can be released only by controlling the second solenoid valve 2 to be opened, the piping arrangement is simple, and the control is convenient.

Alternatively, referring to fig. 2, the extending direction of the first control chamber channel 41 is parallel to the extending direction of the second control chamber channel 42; the extending direction of the third control channel 43 is parallel to the extending direction of the fourth control channel 44; the sixth control chamber 46 extends in a direction parallel to the direction of extension of the control piston 4. Therefore, the arrangement difficulty of the control channels in the dual-fuel injector 01 can be effectively reduced, and the space structure of the dual-fuel injector 01 is effectively utilized.

Optionally, referring to fig. 1 and 3, dual fuel injector 01 further includes a threaded tightening cap 9; the screw tightening cap 9 is connected to the injection body 16 and the needle valve body 11, respectively, for fixing the needle valve body 11 to the injection body 16.

Specifically, the needle valve body 11 and the injection body 16 can be screwed tightly through the screw thread by the screw thread tightening cap 9 so as to connect and fix the injection body 16 and the needle valve body 11 of the nozzle assembly 30, so that the injection body 16 and the needle valve body 11 are not easy to separate, and the reliability of the dual-fuel injector 01 is improved.

Based on the same inventive concept, the embodiment of the present invention further provides an engine system, and fig. 4 is a schematic structural diagram of the engine system provided by the embodiment of the present invention, as shown in fig. 4, the engine system 02 includes a hydrogen storage tank 51, a liquid ammonia storage tank 52, a control oil storage tank 53, a compound pump 54, and a dual fuel injector 01 provided by any embodiment of the present invention; the compound pump 54 is respectively communicated with the liquid ammonia storage tank 52 and the control oil storage tank 53; compound pump 54 is used to provide liquid ammonia in liquid ammonia storage tank 52 into liquid ammonia channel 5 of dual fuel injector 01 and/or compound pump 54 is used to provide control oil in control oil storage tank 53 to control oil inlet 3 of dual fuel injector 01; the hydrogen storage tank 51 communicates with the hydrogen channel 17 of the dual fuel injector 01, and the dual fuel injector 01 is used for injecting hydrogen and liquid ammonia.

The shape and material of the hydrogen storage tank 51, the liquid ammonia storage tank 52 and the control oil storage tank 53 may be set according to actual needs, and each storage tank may be, for example, cylindrical steel, or other storage tanks, which are not particularly limited herein. The compound pump 54 includes a compound hydraulic pump or the like, and may be provided according to actual needs.

Specifically, when the dual fuel injector 01 needs to inject hydrogen, the hydrogen storage tank 51 may supply hydrogen to the dual fuel injector 01, and the control oil storage tank 53 may supply control oil to the dual fuel injector 01 to drive the dual fuel injector 01 to inject hydrogen through the control oil; when the dual fuel injector 01 needs to inject liquid ammonia, the compound pump 54 supplies the control oil in the control oil storage tank 53 to the control oil inlet 3 of the dual fuel injector 01, and supplies the liquid ammonia in the liquid ammonia storage tank 52 to the liquid ammonia channel 5 of the dual fuel injector 01 to cause the dual fuel injector 01 to inject liquid ammonia under the driving of the control oil. Therefore, the compound pump 54 is arranged, so that the compound pump 54 can simultaneously supply liquid ammonia and control oil to the dual-fuel injector 01 or only supply control oil to the dual-fuel injector 01 under different emergent conditions, the working efficiency of the engine system is improved, the number of pump bodies in the engine system is reduced, and the structure of the engine system is simpler.

Alternatively, fig. 5 is a schematic structural diagram of another engine system according to an embodiment of the present invention, and as shown in fig. 5, a liquid ammonia storage tank 52 and a control oil storage tank 53 form a composite storage tank 55. Therefore, the space in the engine system can be saved, and the space utilization rate of the engine system can be improved.

Optionally, referring to FIG. 4, the engine system 02 further includes a combustion cylinder 80, a cover 60, and a spark plug 70 located on the cover 60; the combustion cylinder 80 includes a combustion chamber 81 and a moving piston 82; the cover 60 includes a first opening 61 and a second opening 62 so that the electrode of the spark plug 70 can extend into the combustion chamber 81 through the first opening 61, and so that the hydrogen gas injection holes 21 and the liquid ammonia injection holes 13 of the dual fuel injector 01 can extend into the combustion chamber 81 through the second opening 62; the hydrogen gas and the liquid ammonia are used to push the moving piston 82 to move in the combustion cylinder 80 when being combusted in the combustion chamber 81.

Specifically, taking the example of igniting the liquid ammonia with the hydrogen gas as an example, the dual fuel injector 01 injects a certain amount of hydrogen gas into the combustion chamber 81 through the second opening 62, then stops injecting, drives the ignition plug 70 to ignite, so as to ignite the hydrogen gas in the combustion chamber 81, and then controls the dual fuel injector 01 to inject the liquid ammonia into the combustion chamber 81 through the second opening 62, so that the liquid ammonia is ignited by the hydrogen gas combusted in the combustion chamber 81. The time of injecting hydrogen into the combustion cavity by the dual-fuel injector 01, namely the amount of injecting hydrogen into the combustion cavity, the ignition time of the spark plug 70, and the time of injecting liquid ammonia by the dual-fuel injector 01, namely the amount of injecting liquid ammonia into the combustion cavity 81, can be adjusted and controlled according to the actual working conditions, so that the efficient operation of the engine is realized.

In an alternative embodiment, referring to fig. 4, the engine system 02 further includes a high-pressure hydrogen rail 91, a high-pressure liquid ammonia rail 92, and a high-pressure control oil rail 93, where the high-pressure hydrogen rail 91 is used to communicate the hydrogen storage tank 51 with the hydrogen chamber 17, so that the pressure of the hydrogen entering the hydrogen chamber 17 is consistent with the pressure of the hydrogen output from the hydrogen storage tank 51, thereby reducing pressure fluctuation of the hydrogen during the transmission process and improving stability of hydrogen transmission. The high-pressure liquid ammonia rail 92 is used for communicating the liquid ammonia storage tank 52 with the liquid ammonia cavity channel 5, so that the liquid ammonia pressure entering the liquid ammonia cavity channel 5 is kept consistent with the liquid ammonia pressure output by the liquid ammonia storage tank 52, the pressure fluctuation of liquid ammonia in the transmission process is reduced, and the stability of liquid ammonia transmission is improved. The high-pressure control oil rail 93 is used for communicating the control oil inlet 3 with the control oil storage tank 53, so that the control oil pressure entering the control oil inlet 3 is consistent with the control oil pressure output by the control oil storage tank 53, the pressure fluctuation of the control oil in the transmission process is reduced, and the stability of the control oil transmission is improved.

In another alternative embodiment, the high-pressure hydrogen rail 91 is provided with a pressure regulating valve and a first pressure sensor, and the pressure regulating valve can regulate the hydrogen pressure in the high-pressure hydrogen rail 91 in real time according to the hydrogen pressure obtained by the pressure sensor so as to meet different application requirements; the second pressure sensor and the third pressure sensor are respectively arranged on the high-pressure liquid ammonia rail 92 and the high-pressure control oil rail 93, and the compound pump 54 is used for regulating the liquid ammonia pressure in the high-pressure liquid ammonia rail 92 in real time according to the liquid ammonia pressure acquired by each second pressure sensor and regulating the control oil pressure in the high-pressure control oil rail 93 in real time according to the control oil pressure acquired by the third pressure sensor so as to improve the accuracy of pressure regulation and the working reliability of an engine system.

On the basis of the above embodiment, fig. 6 is a schematic structural diagram of still another engine system provided in the embodiment of the present invention, as shown in fig. 6, the engine system further includes a control module 94, the control module 94 is electrically connected to the control ends of the first electromagnetic valve 15 and the second electromagnetic valve 2 in the dual fuel injector 01, respectively, the control module 94 is further electrically connected to the control end of the spark plug 70, the first pressure sensor, the pressure regulating valve, the second pressure sensor, the third pressure sensor, the compound pump 54, etc., so as to drive the working states of the compound pump 54, the dual fuel injector 01, the spark plug 70, etc. according to the working requirements of the engine system, by the information obtained by the pressure sensors, etc., to improve the working stability and reliability of the engine system.

According to the technical scheme provided by the embodiment of the invention, the compound pump is arranged in the engine system, so that the compound pump can simultaneously provide liquid ammonia and control oil for the dual-fuel injector under different fuel emergent conditions, or only provide control oil for the dual-fuel injector, the working efficiency of the engine system is improved, the number of pump bodies in the engine system is reduced, and the engine system is simpler in structure. By inserting the dual fuel injector provided by the invention into the cover, zero carbon emission can be realized, and in addition, the hydrogen supply, the liquid ammonia supply, the ignition device and the control oil supply device are not interfered with each other, so that the dual fuel injector is high in reliability and easy to realize.

Based on the same inventive concept, the embodiment of the invention also provides a vehicle, which comprises the engine system provided by any embodiment of the invention. Therefore, the vehicle has the technical characteristics of the engine system provided by the embodiment of the invention, and can achieve the beneficial effects of the engine system provided by the embodiment of the invention, and the same points can be referred to the description of the engine system provided by the embodiment of the invention, and are not repeated here.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (11)

1. A dual fuel injector, comprising:

The injection body (16) is internally provided with a first control oil cavity channel (22), a second control oil cavity channel (23), a hydrogen cavity channel (17), a liquid ammonia cavity channel (5) and a control oil inlet (3);

-a first solenoid valve (15), said control oil inlet (3) being in communication with said first control oil gallery (22) through said first solenoid valve (15);

the second electromagnetic valve (2), the said control oil inlet (3) communicates with said first control oil gallery (22) and said second control oil gallery (23) separately through the second electromagnetic valve (2);

a nozzle assembly (30) comprising a needle valve body (11), a hydrogen needle valve (10) and a liquid ammonia needle valve (12); the hydrogen needle valve (10) is positioned in the needle valve body (11), and the liquid ammonia needle valve (12) is positioned in the hydrogen needle valve (10); a hydrogen injection cavity (24) is arranged between the needle valve body (11) and the hydrogen needle valve (10), the hydrogen injection cavity (24) is communicated with the hydrogen cavity channel (17), and the needle valve body (11) further comprises a hydrogen injection hole (21); a liquid ammonia spraying cavity (25) is arranged between the hydrogen needle valve (10) and the liquid ammonia needle valve (12), the liquid ammonia spraying cavity (25) is communicated with the liquid ammonia cavity channel (5), and the hydrogen needle valve (10) further comprises a liquid ammonia spraying hole (13);

the control piston (4) is arranged along the axial direction (X) with the nozzle assembly (30), one end of the control piston (4) is fixedly connected with the liquid ammonia needle valve (12), and the other end of the control piston (4) is positioned in the first control oil cavity (22);

When the first electromagnetic valve (15) is opened, control oil of the control oil inlet (3) enters the first control oil cavity channel (22) through the first electromagnetic valve (15), control oil pressure in the first control oil cavity channel (22) is discharged through the first electromagnetic valve (15), so that the control piston (4) moves along one side of the nozzle assembly (30) close to the first control oil cavity channel (22) and drives the liquid ammonia needle valve (12) to act, and the liquid ammonia cavity channel (5) is communicated with the liquid ammonia spray hole (13) through the liquid ammonia spray cavity (25);

when the second electromagnetic valve (2) is opened, control oil of the control oil inlet (3) respectively enters the first control oil cavity channel (22) and the second control oil cavity channel (23) through the second electromagnetic valve (2), control oil pressure in the first control oil cavity channel (22) and control oil pressure in the second control oil cavity channel (23) are respectively discharged through the second electromagnetic valve (2), so that the control piston (4) moves along one side, close to the first control oil cavity channel (22), of the nozzle assembly (30) and drives the liquid ammonia needle valve (12) and the hydrogen needle valve (10) to synchronously act, and the hydrogen cavity channel (17) is communicated with the hydrogen spray hole (21) through the hydrogen spray cavity (24).

2. The dual fuel injector of claim 1, further comprising: a movable ejector rod (19);

the control piston (4) is fixedly connected with the liquid ammonia needle valve (12) through the movable ejector rod (19).

3. The dual fuel injector of claim 2, further comprising: the device comprises an oil control elastic seat (8), a hydrogen spraying return elastic piece (20), a hydrogen spraying lift limit block (7) and an ammonia spraying return elastic piece (6);

the oil control elastic seat (8) is fixedly connected with the hydrogen needle valve (10), the hydrogen injection lift limiting block (7) is fixedly connected with the injection body (16), and the hydrogen injection lift limiting block (7) is positioned at one side of the oil control elastic seat (8) deviating from the hydrogen needle valve (10);

the second control oil cavity channel (23) is arranged between the hydrogen spraying lift limiting block (7) and the oil control elastic seat (8), the hydrogen spraying return elastic piece (20) is arranged in the second control oil cavity channel (23), one end of the hydrogen spraying return elastic piece (20) is propped against the surface of one side, close to the second control oil cavity channel (23), of the hydrogen spraying lift limiting block (7), and the other end of the hydrogen spraying return elastic piece (20) is propped against the surface of one side, close to the second control oil cavity channel (23), of the oil control elastic seat (8); the hydrogen spraying lift limiting block (7) and the hydrogen spraying return elastic piece (20) are used for limiting the displacement of the oil control elastic seat (8) along the axial direction (X).

The ammonia spraying return elastic piece (6) is located between the movable ejector rod (19) and the control piston (4), one end of the ammonia spraying return elastic piece (6) abuts against one side surface of the control piston (4) close to the movable ejector rod (19), and the other end of the ammonia spraying return elastic piece (6) abuts against one side surface of the movable ejector rod (19) close to the control piston (4).

4. The dual fuel injector of claim 3, further comprising: ammonia spraying pressure regulating gasket (18);

the ammonia spraying pressure regulating gasket (18) is arranged between the control piston (4) and the movable ejector rod (19), and the ammonia spraying pressure regulating gasket (18) is used for limiting the displacement of the movable ejector rod (19) along the axial direction (X).

5. The dual fuel injector of claim 1, further comprising: a first control channel (41), a second control channel (42), a third control channel (43), a fourth control channel (44), a fifth control channel (45) and a sixth control channel (46);

one end of the first control cavity channel (41) is communicated with the control oil inlet (3), and the other end of the first control cavity channel (41) is communicated with the first control oil cavity channel (22) through the first electromagnetic valve (15);

One end of the fourth control cavity channel (44) is communicated with the control oil inlet (3), and the other end of the fourth control cavity channel (44) is communicated with the third control cavity channel (43) through the second electromagnetic valve (2);

the second control cavity channel (42) is respectively communicated with the third control cavity channel (43), the fifth control cavity channel (45) and the sixth control cavity channel (46), and the first control cavity channel (22) is communicated with the fifth control cavity channel (45).

6. The dual fuel injector as claimed in claim 5, characterized in that the direction of extension of the first control channel (41) is parallel to the direction of extension of the second control channel (42); the extending direction of the third control cavity channel (43) is parallel to the extending direction of the fourth control cavity channel (44); the extension direction of the sixth control channel (46) is parallel to the extension direction of the control piston (4).

7. The dual fuel injector of claim 1, further comprising: a threaded tightening cap (9);

the screw tightening cap (9) is respectively connected with the injection body (16) and the needle valve body (11) and is used for fixing the needle valve body (11) on the injection body (16).

8. An engine system, comprising: a hydrogen storage tank (51), a liquid ammonia storage tank (52), a control oil storage tank (53), a compound pump (54) and the dual fuel injector of any of claims 1-7;

The compound pump (54) is respectively communicated with the liquid ammonia storage tank (52) and the control oil storage tank (53); -the compound pump (54) is for providing the liquid ammonia in the liquid ammonia storage tank (52) into a liquid ammonia channel (5) of the dual fuel injector and/or-the compound pump (54) is for providing the control oil in the control oil storage tank (53) at a control oil inlet (3) of the dual fuel injector;

the hydrogen storage tank (51) is in communication with a hydrogen gas channel (17) of the dual fuel injector for injecting the hydrogen gas and the liquid ammonia.

9. The engine system of claim 8, characterized in that the liquid ammonia storage tank (52) and the control oil storage tank (53) constitute a compound storage tank (55).

10. The engine system of claim 8, further comprising: a combustion cylinder (80), a cover (60), and a spark plug (70) located on the cover (60);

the combustion cylinder (80) comprises a combustion chamber (81) and a moving piston (82);

the cover (60) comprises a first opening (61) and a second opening (62) to enable the electrode of the spark plug (70) to extend into the combustion cavity (81) through the first opening (61), and to enable the hydrogen jet (21) and the liquid ammonia jet (13) of the dual fuel injector to extend into the combustion cavity (81) through the second opening (62);

The hydrogen and the liquid ammonia are used for pushing the movable piston (82) to move in the combustion cylinder (80) when being combusted in the combustion cavity (81).

11. A vehicle, characterized by comprising: the engine system of any of claims 8-10.