Mixed injection ammonia-hydrogen engine system

Abstract

The invention relates to a mixed injection ammonia-hydrogen engine system which comprises an ammonia-hydrogen engine. An air inlet assembly; the ammonia gas supply assembly comprises a liquid ammonia storage box, a liquid ammonia vaporizer communicated with the liquid ammonia storage box through a liquid ammonia supply pipe and an ammonia gas supply pipe, one end of the ammonia gas supply pipe is connected with the liquid ammonia vaporizer, and a first pressure regulating valve is mounted on the ammonia gas supply pipe; an ammonia injection assembly; a hydrogen injection assembly; the exhaust assembly comprises an exhaust pipe communicated with the ammonia hydrogen engine, a turbine installed on the exhaust pipe and matched with the gas compressor, and a tail gas after-treatment unit installed on the exhaust pipe and located on the downstream of the turbine. An innovative structure of integrated ammonia cracking hydrogen production, hydrogen / ammonia double-path precise injection and combustion phase coordinated regulation is achieved, ammonia-hydrogen mixed combustion is used, hydrogen comes from ammonia online cracking, the combustion defect of ammonia is overcome, and the storage and transportation problem of hydrogen energy is solved.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, in particular to an engine, and in particular to a mixed injection ammonia-hydrogen engine system. Background Art

[0002] As carbon neutrality progresses, hydrogen, due to its zero-carbon emissions, is seen as an ideal alternative to traditional fossil fuels. However, the storage and transportation of hydrogen face high costs, safety risks, and energy losses at high pressures (70 MPa) or low temperatures (-253°C liquid hydrogen), severely restricting its large-scale application.

[0003] Ammonia, as an efficient hydrogen carrier, can be liquefied at room temperature, and its storage and transportation energy consumption and costs are significantly lower than those of pure hydrogen. This has made ammonia a key research area for hydrogen energy utilization and is considered a promising candidate fuel to replace diesel and natural gas. However, existing ammonia fuel engine technology faces the following key bottlenecks: (1) Combustion performance defects: Ammonia has a slow combustion rate (only 1 / 5 of gasoline) and a high ignition temperature (>650°C), resulting in low thermal efficiency and reliance on a high proportion of ignition fuel (such as diesel, dimethyl ether, etc.), which weakens the zero-carbon benefit; (2) Emission contradiction: Direct combustion of ammonia easily generates unburned NH3 escape and high-temperature NOx, and conventional after-treatment systems are difficult to remove these two types of pollutants simultaneously; (3) Limitations of hydrogen-assisted technology: Existing technologies attempt to incorporate hydrogen (H2) to improve the combustion characteristics of ammonia, but hydrogen storage costs are high and safety is poor. In addition, the mechanical supercharged hydrogen supply method is prone to cause in-cylinder detonation, limiting power output.

[0004] Chinese invention patent application number 202210497568.3 discloses a combined-injection ammonia-hydrogen engine and control method. Specifically, it involves a control method for adjusting the injection pattern and parameters of hydrogen and ammonia based on engine operating conditions, aiming to achieve high engine power output and avoid abnormal combustion such as pre-ignition, backfire, and knock. The system primarily comprises an intake system, a hydrogen supply system, an ammonia supply system, and a control system. The ECU determines crankshaft position and speed using a crankshaft position sensor and a speed sensor, and detects knock and backfire based on knock and intake manifold pressure sensors. Based on power demand and abnormal combustion control requirements, the ECU adjusts the high-pressure and low-pressure pressure reducing valves of the hydrogen supply system, enabling high-pressure hydrogen direct injection and low-pressure hydrogen intake port injection. The ECU also adjusts the injection pulse width of the ammonia supply system. This combined-injection ammonia-hydrogen engine can eliminate abnormal combustion issues such as backfire and knock in hydrogen engines, while also improving engine output power and driving range. However, the hydrogen in this combined-injection ammonia-hydrogen engine is supplied by a separate high-pressure gas cylinder, making it difficult to meet the commercialization and mass production requirements of combined-injection ammonia-hydrogen engines. Summary of the Invention

[0005] The purpose of the present invention is to provide a mixed injection ammonia-hydrogen engine system in order to overcome the deficiencies of the prior art.

[0006] To achieve the above object, the present invention adopts a technical solution: a mixed injection ammonia hydrogen engine system, which includes: Ammonia-hydrogen engine; An air intake assembly, the air intake assembly comprising an air intake manifold, an intake manifold connected to an end of the air intake manifold and connected to the ammonia-hydrogen engine, a compressor mounted on the air intake manifold, an intercooler mounted on the air intake manifold and located downstream of the compressor, and a throttle mounted on the air intake manifold and located downstream of the intercooler; an ammonia supply assembly, the ammonia supply assembly comprising a liquid ammonia storage tank, a liquid ammonia vaporizer connected to the liquid ammonia storage tank via a liquid ammonia supply pipe, and an ammonia supply pipe having one end connected to the liquid ammonia vaporizer and equipped with a first pressure regulating valve; an ammonia injection assembly, the ammonia injection assembly comprising an ammonia supply branch pipe having one end connected to the ammonia supply pipe and located downstream of the first pressure regulating valve, and an ammonia injector connected to the other end of the ammonia supply branch pipe and cooperating with the air intake manifold or the intake manifold; A hydrogen injection assembly, comprising a hydrogen buffer tank, an ammonia-to-hydrogenation module connected to the hydrogen buffer tank via a hydrogen supply pipe, a hydrogen outlet pipe having one end connected to the hydrogen buffer tank, and a hydrogen injector connected to the other end of the hydrogen outlet pipe and cooperating with the intake manifold, wherein the ammonia-to-hydrogenation module is also connected to the ammonia supply pipe; An exhaust assembly includes an exhaust pipe connected to the ammonia-hydrogen engine, a turbine installed on the exhaust pipe and matched with the compressor, and an exhaust gas after-treatment unit installed on the exhaust pipe and located downstream of the turbine.

[0007] Optimally, the ammonia-to-hydrogenation module is mounted on the exhaust pipe and located between the exhaust gas after-treatment unit and the turbine.

[0008] Optimally, it also includes: a DC power supply component, which includes a battery pack, a first DC / DC converter connected to the battery pack and to the liquid ammonia vaporizer, and a second DC / DC converter connected to the battery pack and to the ammonia-to-hydrogenation module.

[0009] Furthermore, the ammonia supply assembly also includes a return pipe, one end of which is connected to the ammonia supply pipe and the other end is connected to the liquid ammonia storage tank, and a self-boosting pump installed on the return pipe, and one end of the return pipe is connected between the liquid ammonia vaporizer and the first pressure regulating valve.

[0010] Furthermore, a first solenoid valve is installed on the liquid ammonia supply pipe, a second pressure regulating valve located downstream of the first pressure regulating valve and a second solenoid valve located downstream of the second pressure regulating valve are installed on the ammonia supply pipe, and the connection point between the ammonia supply branch pipe and the ammonia supply pipe is located between the first pressure regulating valve and the second pressure regulating valve.

[0011] Furthermore, the ammonia supply assembly also includes a heat exchange medium feed pipe connected to the liquid ammonia vaporizer, a heat exchange medium discharge pipe connected to the liquid ammonia vaporizer, and a third solenoid valve installed on the heat exchange medium feed pipe.

[0012] Furthermore, the hydrogen injection assembly includes a hydrogen pump installed on the hydrogen supply pipe and a third pressure regulating valve installed on the hydrogen supply pipe and located downstream of the hydrogen pump.

[0013] Furthermore, the air intake assembly also includes an air filter installed on the air intake manifold and located upstream of the compressor, an ambient temperature sensor and an ambient pressure sensor installed on the air intake manifold and located upstream of the air filter, a pre-throttle temperature and pressure sensor installed on the air intake manifold and located upstream of the throttle, and a post-throttle temperature and pressure sensor installed on the air intake manifold and located downstream of the throttle.

[0014] Furthermore, the air intake assembly further includes an intercooler bypass branch pipe connected to the air intake main pipe and connected in parallel with the intercooler, and an intercooler bypass valve is installed on the intercooler bypass branch pipe.

[0015] Furthermore, the air intake assembly further includes a mixer installed on the air intake manifold and located downstream of the throttle valve, and the ammonia injection assembly further includes an ejection pipe connecting the ammonia injector and the mixer.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the mixed injection ammonia-hydrogen engine system of the present invention adopts a specific structure of air intake components, ammonia supply components, ammonia injection components, hydrogen injection components and ammonia-hydrogen engines to cooperate, thereby realizing an innovative configuration of integrated ammonia cracking to produce hydrogen, hydrogen / ammonia dual-path precise injection and coordinated control of combustion phase. Ammonia-hydrogen mixed combustion is used, and hydrogen comes from online cracking of ammonia, which solves the defects of ammonia combustion and solves the storage and transportation problems of hydrogen energy, and meets the needs of commercialization and mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the mixed injection ammonia-hydrogen engine system of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0019] like Figure 1 The hybrid injection ammonia-hydrogen engine system shown mainly includes an ammonia-hydrogen engine 1 (referred to as the engine for short), an ammonia supply component 2, an ammonia injection component 3, a hydrogen injection component 4, a DC power supply component 5 and an air intake component 6, etc.

[0020] The specific structure of the ammonia-hydrogen engine 1 is not the subject of this invention; conventional existing structures may be employed, such as the engine body disclosed in Chinese Invention Patent Application No. 202311253584.9, which typically has a spark plug 11 mounted thereon. In this embodiment, the ammonia-hydrogen engine 1 is equipped with an electronically controlled oil-gas separation module 13, which integrates a hydrogen concentration sensor 12 to monitor the hydrogen concentration within the exhaust chamber of the ammonia-hydrogen engine 1 in real time. When the hydrogen concentration exceeds a safety threshold, the electronically controlled oil-gas separation module 13 automatically increases the speed of its internal rotating separation portion, accelerating the discharge of hydrogen and preventing its accumulation within the crankcase and causing an explosion.

[0021] The air intake assembly 6 primarily comprises an air intake manifold 61, an intake manifold, an intercooler 63, and a throttle valve 65. The intake manifold is connected to the end of the air intake manifold 61 and is in communication with the ammonia-hydrogen engine 1. The compressor is mounted on the air intake manifold 61. The intercooler 63 is mounted on the air intake manifold 61 downstream of the compressor. The throttle valve 65 is also mounted on the air intake manifold 61 downstream of the intercooler 63. In this embodiment, the air intake assembly 6 also includes an air filter 62 installed on the air intake manifold 61 and located upstream of the compressor, an ambient temperature sensor 60 and an ambient pressure sensor 67 installed on the air intake manifold 61 and located upstream of the air filter 62, a pre-throttle temperature and pressure sensor 68 installed on the air intake manifold 61 and located upstream of the throttle 65, and a post-throttle temperature and pressure sensor 69 installed on the air intake manifold 61 and located downstream of the throttle 65 (the pre-throttle temperature and pressure sensor 68 and the post-throttle temperature and pressure sensor 69 are located upstream and downstream of the throttle 65, respectively, and both are located downstream of the intercooler 63), so as to accurately obtain the temperature and pressure at the corresponding positions. The air intake assembly 6 also includes an intercooler bypass branch 64 connected to the air intake manifold 61 and in parallel with the intercooler 63. An intercooler bypass valve 641 is mounted on the intercooler bypass branch 64, which regulates the intake air temperature downstream of the intercooler 63 to a suitable temperature range, thereby improving combustion efficiency. In this embodiment, the air intake assembly 6 also includes a mixer 66 mounted on the air intake manifold 61 and downstream of the throttle 65 to mix ammonia with fresh air.

[0022] The ammonia supply assembly 2 includes a liquid ammonia storage tank 21 (for storing liquid ammonia), a liquid ammonia vaporizer 24 (for vaporizing liquid ammonia into ammonia gas) connected to the liquid ammonia storage tank 21 via a liquid ammonia supply pipe 22, and an ammonia supply pipe 25, one end of which is connected to the liquid ammonia vaporizer 24 and equipped with a first pressure regulating valve 28, for delivering ammonia gas at a reasonable pressure downstream. In this embodiment, the ammonia supply assembly 2 also includes a return pipe 26, one end of which is connected to the ammonia supply pipe 25 and the other end to the liquid ammonia storage tank 21, and a self-boosting pump 27 mounted on the return pipe 26. One end of the return pipe 26 is connected between the liquid ammonia vaporizer 24 and the first pressure regulating valve 28, thereby allowing some of the ammonia gas to be liquefied and then fed into the liquid ammonia storage tank 21. A first solenoid valve 23 is installed on the liquid ammonia supply pipe 22, and a second pressure-regulating valve 29, located downstream of the first pressure-regulating valve 28, and a second solenoid valve 20, located downstream of the second pressure-regulating valve 29, are installed on the ammonia supply pipe 25. This allows for precise control of the ammonia output from the ammonia supply pipe 25. The ammonia supply assembly 2 also includes a heat exchange medium feed pipe 241 connected to the liquid ammonia vaporizer 24, a heat exchange medium discharge pipe 243 connected to the liquid ammonia vaporizer 24, and a third solenoid valve 242 installed on the heat exchange medium feed pipe 241. This allows the heat exchange medium to heat the liquid ammonia flowing through the liquid ammonia vaporizer 24 to form ammonia gas, with some of the ammonia gas being transported downstream via the ammonia supply pipe 25 (as feed gas for hydrogen production).

[0023] The ammonia injection assembly 3 includes an ammonia supply branch pipe 31, one end of which is connected to the ammonia supply pipe 25 and located downstream of the first pressure regulating valve 28. It also includes an ammonia injector 32, which is connected to the other end of the ammonia supply branch pipe 31 and cooperates with the air intake manifold 61 or the intake manifold. Specifically, the connection between the ammonia supply branch pipe 31 and the ammonia supply pipe 25 is located between the first and second pressure regulating valves 28 and 29. The ammonia injection assembly 3 also includes an outlet pipe 30 connecting the ammonia injector 32 and a mixer 66. This allows the remaining ammonia to pass through the ammonia supply branch pipe 31 and be injected by the ammonia injector 32. The ammonia then mixes with the fresh air (in the air intake manifold 61) through the outlet pipe 30 and mixer 66, allowing the ammonia to enter the air intake manifold 61 at a single point after the throttle valve 65.

[0024] The hydrogen injection assembly 4 includes a hydrogen buffer tank 43, an ammonia-to-hydrogenation module 46 connected to the hydrogen buffer tank 43 via a hydrogen supply pipe 41 (the specific structure of the ammonia-to-hydrogenation module 46 is not the invention of this application and can adopt a conventional existing structure as long as it can convert ammonia into hydrogen and nitrogen; specifically, ammonia is converted into hydrogen and nitrogen in the ammonia-to-hydrogenation module 46 through the action of high temperature and catalyst, and the reaction equation is 2NH3→N2+3H2); a hydrogen outlet pipe 42 connected to the hydrogen buffer tank 43 at one end; and a hydrogen injector 47 connected to the other end of the hydrogen outlet pipe 42 and coordinated with the intake manifold. The ammonia-to-hydrogenation module 46 is also connected to the ammonia supply pipe 25. In this embodiment, the hydrogen injection assembly 4 includes a hydrogen pump 45 mounted on the hydrogen supply pipe 41 and a third pressure regulating valve 44 mounted on the hydrogen supply pipe 41 and located downstream of the hydrogen pump 45. The hydrogen and nitrogen mixture produced by the ammonia-to-hydrogenation reaction is pressurized by a hydrogen pump 45, passes through a third pressure regulating valve 44, enters a hydrogen buffer tank 43, and then enters a hydrogen injector 47. This hydrogen and nitrogen mixture is injected into the engine's intake manifold via hydrogen injector 47, where it enters the cylinder along with the fresh air and ammonia mixture for combustion. Specifically, ammonia is injected into the air intake manifold 61 at a single point after the throttle valve 65 at a pressure of 5-8 bar, while hydrogen is injected into the intake manifold at multiple points at a pressure of 5-8 bar. After entering the cylinder with the airflow, the ammonia and hydrogen are ignited and burned by the spark plug 11.

[0025] It can be seen that the mixed injection ammonia-hydrogen engine system of the present application is an ammonia-hydrogen dual-fuel engine, in which ammonia is the main fuel and accounts for a large proportion of energy under normal operating conditions (≥90%); hydrogen is an auxiliary fuel, which plays a role in supporting combustion and accounts for a small proportion of energy under normal operating conditions (≤10%).

[0026] The exhaust assembly 7 includes an exhaust pipe 71 connected to the ammonia-hydrogen engine 1, a turbine mounted on the exhaust pipe 71 and matched with the compressor (usually, the turbine and compressor are combined to form an independent functional device, namely a turbocharger), and an exhaust gas after-treatment unit 72 mounted on the exhaust pipe 71 and located downstream of the turbine.

[0027] It can be seen that by adopting a specific structure of the air intake component 6, the ammonia supply component 2, the ammonia injection component 3, the hydrogen injection component 4 and the ammonia-hydrogen engine 1, an innovative configuration of integrated ammonia cracking hydrogen production, hydrogen / ammonia dual-path precise injection and coordinated control of combustion phase is achieved. Ammonia and hydrogen mixed combustion is used, and the hydrogen comes from the online cracking of ammonia, which solves the defects of ammonia combustion and the storage and transportation problems of hydrogen energy, and meets the needs of commercialization and mass production.

[0028] In this embodiment, the ammonia-to-hydrogenation module 46 is installed on the exhaust pipe 71 and is located between the exhaust gas after-treatment unit 72 and the turbine. In this way, the ammonia-to-hydrogenation module 46 can be used to treat the ammonia in the exhaust gas to prevent ammonia from polluting the environment. In addition, the exhaust gas after-treatment unit 72 can adopt the existing conventional one (mainly used for catalytic treatment of NOx), which can greatly reduce the cost of exhaust gas treatment.

[0029] The hybrid injection ammonia-hydrogen engine system also preferably includes a DC power supply component 5, which includes a battery pack 51, a first DC / DC converter 52 connected to the battery pack 51 and connected to the liquid ammonia vaporizer 24, and a second DC / DC converter 53 connected to the battery pack 51 and connected to the ammonia-to-hydrogen module 46. In this way, the battery pack 51 can, on the one hand, supply power to the liquid ammonia vaporizer 24, providing double protection for the normal operation of the liquid ammonia vaporizer 24; on the other hand, it can supply power to the ammonia-to-hydrogen module 46, enabling it to operate normally. That is, the heat of the liquid ammonia vaporizer 24 comes from two sources: electric heating and heating by the engine coolant (heat exchange medium). When the engine is in a cold state or not started, the coolant temperature is too low to provide effective heat for vaporizing the liquid ammonia. At this time, the battery pack 51 is used to perform electric heating after the voltage is reduced by the first DC / DC converter 52. After the engine coolant temperature exceeds a threshold value (a conventional choice in this field, such as a reference value of 70°C), the third solenoid valve 242 is opened to use the coolant to provide heat for the liquid ammonia vaporizer 24. After a certain delay (a conventional choice in this field, such as a reference value of 20s), the electric heating is gradually turned off (the duty cycle begins to gradually decrease until it reaches zero after the delay).

[0030] Similarly, heat for the ammonia-to-hydrogen module 46 comes from two sources: electrical heating and engine exhaust temperature. When the engine is cold or not started, the exhaust temperature is too low to provide sufficient heat for the ammonia-to-hydrogen reaction. In this case, all heat comes from the electrical heating of the battery pack 51 after voltage reduction by the second DC / DC converter 53. After the engine is started, the exhaust temperature begins to gradually rise. The temperature sensor within the ammonia-to-hydrogen module 46 provides real-time feedback on the module's internal temperature. The duty cycle of the electrical heating is adjusted in a closed-loop manner based on the exhaust temperature at different engine loads, ensuring that the internal temperature of the ammonia-to-hydrogen module 46 remains within a certain range and its temperature fluctuation is controlled within ±20°C.

[0031] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A mixed injection ammonia hydrogen engine system, characterized in that: It includes: Ammonia hydrogen engine (1); An air intake assembly (6), the air intake assembly (6) comprising an air intake manifold (61), an intake manifold connected to an end of the air intake manifold (61) and connected to the ammonia-hydrogen engine (1), a compressor mounted on the air intake manifold (61), an intercooler (63) mounted on the air intake manifold (61) and located downstream of the compressor, and a throttle valve (65) mounted on the air intake manifold (61) and located downstream of the intercooler (63); An ammonia supply assembly (2), the ammonia supply assembly (2) comprising a liquid ammonia storage tank (21), a liquid ammonia vaporizer (24) connected to the liquid ammonia storage tank (21) via a liquid ammonia supply pipe (22), and an ammonia supply pipe (25) having one end connected to the liquid ammonia vaporizer (24) and equipped with a first pressure regulating valve (28); an ammonia injection assembly (3), the ammonia injection assembly (3) comprising an ammonia supply branch pipe (31) having one end connected to the ammonia supply pipe (25) and a connection point located downstream of the first pressure regulating valve (28), and an ammonia injector (32) connected to the other end of the ammonia supply branch pipe (31) and cooperating with the air intake manifold (61) or the intake manifold; A hydrogen injection assembly (4), the hydrogen injection assembly (4) comprising a hydrogen buffer tank (43), an ammonia-to-hydrogenation module (46) connected to the hydrogen buffer tank (43) via a hydrogen supply pipe (41), a hydrogen outlet pipe (42) one end of which is connected to the hydrogen buffer tank (43), and a hydrogen injector (47) connected to the other end of the hydrogen outlet pipe (42) and matched with the intake manifold, the ammonia-to-hydrogenation module (46) also being connected to the ammonia supply pipe (25); An exhaust assembly (7), the exhaust assembly (7) comprising an exhaust pipe (71) in communication with the ammonia-hydrogen engine (1), a turbine mounted on the exhaust pipe (71) and matched with the compressor, and an exhaust gas after-treatment unit (72) mounted on the exhaust pipe (71) and located downstream of the turbine.

2. The hybrid injection ammonia-hydrogen engine system according to claim 1, characterized in that: The ammonia-to-hydrogenation module (46) is mounted on the exhaust pipe (71) and is located between the exhaust gas after-treatment unit (72) and the turbine.

3. The hybrid injection ammonia-hydrogen engine system according to claim 1, characterized in that: It also includes: a DC power supply component (5), the DC power supply component (5) including a battery pack (51), a first DC / DC converter (52) connected to the battery pack (51) and connected to the liquid ammonia vaporizer (24), and a second DC / DC converter (53) connected to the battery pack (51) and connected to the ammonia-to-hydrogenation module (46).

4. The hybrid injection ammonia-hydrogen engine system according to claim 1 or 2, characterized in that: The ammonia supply assembly (2) further includes a return pipe (26) having one end connected to the ammonia supply pipe (25) and the other end connected to the liquid ammonia storage tank (21), and a self-boosting pump (27) mounted on the return pipe (26); one end of the return pipe (26) is connected between the liquid ammonia vaporizer (24) and the first pressure regulating valve (28).

5. The hybrid injection ammonia-hydrogen engine system according to claim 4, characterized in that: A first solenoid valve (23) is installed on the liquid ammonia supply pipe (22), a second pressure regulating valve (29) located downstream of the first pressure regulating valve (28) and a second solenoid valve (20) located downstream of the second pressure regulating valve (29) are installed on the ammonia supply pipe (25), and a connection point between the ammonia supply branch pipe (31) and the ammonia supply pipe (25) is located between the first pressure regulating valve (28) and the second pressure regulating valve (29).

6. The hybrid injection ammonia-hydrogen engine system according to claim 4, characterized in that: The ammonia supply assembly (2) further comprises a heat exchange medium feed pipe (241) connected to the liquid ammonia vaporizer (24), a heat exchange medium discharge pipe (243) connected to the liquid ammonia vaporizer (24), and a third solenoid valve (242) mounted on the heat exchange medium feed pipe (241).

7. The hybrid injection ammonia-hydrogen engine system according to claim 1, 2 or 3, characterized in that: The hydrogen injection assembly (4) comprises a hydrogen pump (45) installed on the hydrogen supply pipe (41) and a third pressure regulating valve (44) installed on the hydrogen supply pipe (41) and located downstream of the hydrogen pump (45).

8. The hybrid injection ammonia-hydrogen engine system according to claim 1, 2 or 3, characterized in that: The air intake assembly (6) further includes an air filter (62) mounted on the air intake manifold (61) and located upstream of the compressor, an ambient temperature sensor (60) and an ambient pressure sensor (67) mounted on the air intake manifold (61) and located upstream of the air filter (62), a pre-throttle temperature and pressure sensor (68) mounted on the air intake manifold (61) and located upstream of the throttle valve (65), and a post-throttle temperature and pressure sensor (69) mounted on the air intake manifold (61) and located downstream of the throttle valve (65).

9. The hybrid injection ammonia-hydrogen engine system according to claim 8, characterized in that: The air intake assembly (6) further includes an intercooler bypass branch pipe (64) connected to the air intake main pipe (61) and connected in parallel with the intercooler (63), and an intercooler bypass valve (641) is installed on the intercooler bypass branch pipe (64).

10. The hybrid injection ammonia-hydrogen engine system according to claim 1, 2 or 3, characterized in that: The air intake assembly (6) further includes a mixer (66) mounted on the air intake manifold (61) and located downstream of the throttle valve (65), and the ammonia injection assembly (3) further includes an ejection pipe (30) communicating with the ammonia injector (32) and the mixer (66).

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