Integrated system of hydrogen injector and hydrogen rail of hydrogen internal combustion engine

Abstract

The invention discloses an integrated system of hydrogen injectors and a hydrogen gas rail of a hydrogen internal combustion engine. The integrated system comprises the hydrogen gas rail, the multiple hydrogen injectors and a control system. The hydrogen gas rail is communicated with a hydrogen gas supply system; the multiple hydrogen injectors are integrated with the hydrogen gas rail, obtain hydrogen from the hydrogen gas rail and are used for injecting hydrogen into multiple air cylinders of the internal combustion engine; and the control system is in electrical data connection with the hydrogen gas rail and the plurality of hydrogen ejectors. According to the integrated system of the hydrogen injectors and the hydrogen gas rail of the hydrogen internal combustion engine, the hydrogen gas rail and the multiple hydrogen injectors are integrated, in this way, the combustion efficiency can be improved, emission can be reduced, and technical support is provided for development of the hydrogen internal combustion engine.

Description

Technical Field

[0001] The invention relates to the field of internal combustion engine design and manufacturing, and in particular to an integrated system of a hydrogen injector and a hydrogen rail of a hydrogen internal combustion engine. Background Art

[0002] As the world pays more and more attention to environmental protection and renewable energy, hydrogen energy, as a clean energy, has gradually gained attention in the field of internal combustion engines. However, there are certain technical challenges in the hydrogen combustion process of traditional internal combustion engines, including complex hydrogen injector design, static separation of gas flow, low combustion efficiency and other problems. In the prior art, the separation design of hydrogen injector and hydrogen gas rail leads to insufficient airflow optimization, which in turn affects the operating efficiency and emission performance of the internal combustion engine. Therefore, there is an urgent need for a new integrated design scheme to improve the overall performance of hydrogen internal combustion engines.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated system of a hydrogen injector and a hydrogen gas rail for a hydrogen internal combustion engine, which integrates the hydrogen gas rail and multiple hydrogen injectors into one, thereby improving combustion efficiency and reducing emissions, and providing technical support for the development of hydrogen internal combustion engines.

[0005] To achieve the above-mentioned purpose, the present invention provides an integrated system of a hydrogen injector and a hydrogen gas rail of a hydrogen internal combustion engine, comprising a hydrogen gas rail, a plurality of hydrogen injectors and a control system; the hydrogen gas rail is connected to a hydrogen gas supply system; a plurality of hydrogen injectors are integrated with the hydrogen gas rail and obtain hydrogen from the hydrogen gas rail, and the plurality of hydrogen injectors are used to inject hydrogen into a plurality of cylinders of the internal combustion engine; and the control system is electrically and data-connected to the hydrogen gas rail and the plurality of hydrogen injectors.

[0006] In a preferred embodiment, the integrated system of the hydrogen injector and the hydrogen rail of the hydrogen internal combustion engine further includes a pressure temperature sensor, a pressure regulator and a fuel cut-off valve; the pressure temperature sensor is arranged between the hydrogen rail and the electronic throttle and between the electronic throttle and the intercooler, and the other end of the intercooler is connected to the intake end of the supercharger; the pressure regulator is arranged between the pressure temperature sensor and the multiple fuel sources; the fuel cut-off valve is arranged between the pressure regulator and the multiple fuel sources; wherein the pressure temperature sensor, the pressure regulator and the fuel cut-off valve are all electrically data connected to the control system.

[0007] In a preferred embodiment, the integrated system of the hydrogen injector and the hydrogen rail of the hydrogen internal combustion engine further includes an oxygen sensor, a first urea injector, a second urea injector, a differential pressure sensor, a first NOx sensor, a second NOx sensor and an SCR injection system module; the oxygen sensor is arranged between the exhaust end of the supercharger and the intake end of the cDPF; the first urea injector is arranged between the oxygen sensor and the intake end of the cDPF; the second urea injector is arranged on the cDPF for injecting urea into the cDPF; the differential pressure sensor is arranged at the intake end and the outlet end of the cDPF; the first NOx sensor and the second NOx sensor are arranged between the outlet end of the cDPF and the intake ends of the aSCR and the ASC and at the outlet ends of the aSCR and the ASC; the SCR injection system module is arranged between the outlet end of the cDPF and the first NOx sensor; wherein the oxygen sensor, the first urea injector, the second urea injector, the differential pressure sensor, the first NOx sensor, the second NOx sensor and the SCR injection system module are all electrically data connected to the control system.

[0008] In a preferred embodiment, the integrated system of hydrogen injectors and hydrogen rails for a hydrogen internal combustion engine further comprises a plurality of mounting bolt holes, which are arranged on the hydrogen rails and used to mount the integrated body of the hydrogen rails and the plurality of hydrogen injectors on the body of the internal combustion engine.

[0009] In a preferred embodiment, the hydrogen supply system decompresses the hydrogen in the hydrogen tank through a pressure reducing valve and then sends it into the hydrogen rail. The hydrogen rail can sense the working state of the hydrogen injector of the internal combustion engine according to the control system and determine the injection amount of hydrogen of the hydrogen injector.

[0010] In a preferred embodiment, the hydrogen injector can automatically inject hydrogen into the hydrogen internal combustion engine for injection according to the instruction of the control system.

[0011] In a preferred embodiment, the hydrogen demand between the hydrogen injector and the hydrogen rail follows the following mathematical model:

[0012] Flow equation: The hydrogen flow rate (Q) output by the hydrogen injector can be expressed by the following formula: Q = A*υ;

[0013] Where Q: hydrogen demand (unit: m3 / s), A: nozzle cross-sectional area (unit: m2), η: injection efficiency (dimensionless);

[0014] Gas flow rate equation: Hydrogen flow rate (υ) can be calculated by the following formula:

[0015] Where P: injection pressure of the injector (unit: Pa), ρ: hydrogen density (unit: kg / m3);

[0016] Substituting the formula for flow rate into the flow equation yields:

[0017] Efficiency equation: In practical applications, the injection efficiency (η) can be introduced to consider the effectiveness of the system:

[0018]

[0019] In a preferred embodiment, different hydrogen demands between the hydrogen injector and the hydrogen rail can be met by adjusting the cross-sectional area of ​​the nozzle, the injection pressure of the injector, and the injection efficiency.

[0020] Compared with the prior art, the integrated system of the hydrogen injector and the hydrogen gas rail of the hydrogen internal combustion engine of the present invention has the following beneficial effects: the scheme integrates the hydrogen injector and the hydrogen gas rail of the hydrogen internal combustion engine, and the gas rail is designed to be as short and straight as possible to reduce pressure loss and cooling of hydrogen, aiming to improve combustion efficiency and reduce emissions; the nozzle is located at the core of the system, responsible for injecting hydrogen into the combustion chamber in precise amounts, and the nozzle is designed to allow hydrogen to mix with air to achieve efficient combustion; the bracket is used to fix the nozzle and the gas rail to ensure their correct position in the engine, and the design of the bracket is preferably both strong and lightweight to reduce the impact on engine performance; the scheme can improve combustion efficiency by 10% to 20%, reduce combustion emissions by 15%, effectively reduce the environmental impact of the hydrogen internal combustion engine, improve equipment operation stability, and extend service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a planar structure of an injector and a gas rail according to an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of a planar structure in which an injector and a gas rail are integrated into an internal combustion engine according to an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the planar structure of an overall integrated system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0027] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0028] like Figures 1 to 3 As shown, according to a preferred embodiment of the present invention, an integrated system of a hydrogen injector and a hydrogen rail for a hydrogen internal combustion engine includes a hydrogen rail, a plurality of hydrogen injectors and a control system; the hydrogen rail is connected to a hydrogen supply system; the plurality of hydrogen injectors are integrated with the hydrogen rail and obtain hydrogen from the hydrogen rail, and the plurality of hydrogen injectors are used to inject hydrogen into a plurality of cylinders of the internal combustion engine; and the control system is electrically and data-connected to the hydrogen rail and the plurality of hydrogen injectors.

[0029] In some embodiments, the integrated system of the hydrogen injector and the hydrogen rail of the hydrogen internal combustion engine further includes a pressure temperature sensor, a pressure regulator and a fuel cut-off valve; the pressure temperature sensor is arranged between the hydrogen rail and the electronic throttle and between the electronic throttle and the intercooler, and the other end of the intercooler is connected to the intake end of the supercharger; the pressure regulator is arranged between the pressure temperature sensor and multiple fuel sources; the fuel cut-off valve is arranged between the pressure regulator and the multiple fuel sources; wherein the pressure temperature sensor, the pressure regulator and the fuel cut-off valve are all electrically data connected to the control system.

[0030] In some embodiments, the integrated system of the hydrogen injector and the hydrogen rail of the hydrogen internal combustion engine further includes an oxygen sensor, a first urea injector T1, a second urea injector T2, a differential pressure sensor, a first NOx sensor, a second NOx sensor, and an SCR injection system module; the oxygen sensor is arranged between the exhaust end of the supercharger and the intake end of the cDPF; the first urea injector is arranged between the oxygen sensor and the intake end of the cDPF; the second urea injector is arranged on the cDPF for injecting urea into the cDPF; the differential pressure sensor is arranged at the intake end and the outlet end of the cDPF; the first NOx sensor and the second NOx sensor are respectively arranged between the outlet end of the cDPF and the intake ends of the aSCR and the ASC and at the outlet ends of the aSCR and the ASC; the SCR injection system module is arranged between the outlet end of the cDPF and the first NOx sensor; wherein the oxygen sensor, the first urea injector, the second urea injector, the differential pressure sensor, the first NOx sensor, the second NOx sensor, and the SCR injection system module are all electrically data connected to the control system.

[0031] In some embodiments, the integrated system of hydrogen injectors and hydrogen rails for hydrogen internal combustion engines further comprises a plurality of mounting bolt holes, which are arranged on the hydrogen rails and used to mount the integrated body of the hydrogen rails and the plurality of hydrogen injectors on the body of the internal combustion engine.

[0032] In some embodiments, the hydrogen supply system decompresses the hydrogen in the hydrogen tank through a pressure reducing valve and then delivers it to the hydrogen rail. The hydrogen rail can sense the working state of the hydrogen injector of the internal combustion engine according to the control system and determine the injection amount of the hydrogen injector.

[0033] In some embodiments, the hydrogen injector can automatically inject hydrogen into the hydrogen internal combustion engine for injection according to the command of the control system.

[0034] In some embodiments, the hydrogen demand between the hydrogen injector and the hydrogen rail follows the following mathematical model:

[0035] Flow equation: The hydrogen flow rate (Q) output by the hydrogen injector can be expressed by the following formula: Q = A*υ;

[0036] Where Q: hydrogen demand (unit: m3 / s), A: nozzle cross-sectional area (unit: m2), η: injection efficiency (dimensionless);

[0037] Gas flow rate equation: Hydrogen flow rate (υ) can be calculated by the following formula:

[0038] Where P: injection pressure of the injector (unit: Pa), ρ: hydrogen density (unit: kg / m3);

[0039] Substituting the formula for flow rate into the flow equation yields:

[0040] Efficiency equation: In practical applications, the injection efficiency (η) can be introduced to consider the effectiveness of the system:

[0041]

[0042] In some embodiments, different hydrogen demands between the hydrogen injector and the hydrogen rail can be met by adjusting the cross-sectional area of ​​the nozzle, the injection pressure of the injector, and the injection efficiency.

[0043] In some embodiments, the model can be verified and adjusted by using actual experimental data to improve the accuracy of the prediction. The above mathematical model can also be used to calculate the hydrogen demand between the hydrogen injector and the gas rail under different working conditions, so as to better design and optimize the system.

[0044] In summary, the integrated system of the hydrogen injector and the hydrogen gas rail of the hydrogen internal combustion engine of the present invention has the following advantages: the scheme integrates the hydrogen injector and the hydrogen gas rail of the hydrogen internal combustion engine, and the gas rail is designed to be as short and straight as possible to reduce pressure loss and cooling of hydrogen, aiming to improve combustion efficiency and reduce emissions; the nozzle is located at the core of the system, responsible for injecting hydrogen into the combustion chamber in precise amounts, and the nozzle is designed to allow hydrogen to mix with air to achieve efficient combustion; the bracket is used to fix the nozzle and the gas rail to ensure their correct position in the engine, and the design of the bracket is preferably both strong and lightweight to reduce the impact on engine performance; the scheme can improve the combustion efficiency by 10% to 20%, reduce combustion emissions by 15%, effectively reduce the environmental impact of the hydrogen internal combustion engine, improve the equipment operation stability, and extend the service life.

[0045] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. An integrated system of a hydrogen injector and a hydrogen rail for a hydrogen internal combustion engine, characterized in that: include: A hydrogen gas rail, which is connected to a hydrogen gas supply system; a plurality of hydrogen injectors, which are integrated with the hydrogen rail and obtain hydrogen from the hydrogen rail, and the plurality of hydrogen injectors are used to inject hydrogen into a plurality of cylinders of the internal combustion engine; as well as A control system is electrically connected to the hydrogen rail and the plurality of hydrogen injectors.

2. The integrated system of hydrogen injector and hydrogen rail for hydrogen internal combustion engine as claimed in claim 1, characterized in that: Also includes: A pressure and temperature sensor is arranged between the hydrogen rail and the electronic throttle and between the electronic throttle and the intercooler, and the other end of the intercooler is connected to the air intake end of the supercharger; a pressure regulator disposed between the pressure-temperature sensor and a plurality of fuel sources; and a fuel shutoff valve disposed between the pressure regulator and the plurality of fuel sources; The pressure and temperature sensor, the pressure regulator and the fuel cut-off valve are all electrically connected to the control system.

3. The integrated system of hydrogen injector and hydrogen rail for hydrogen internal combustion engine as claimed in claim 2, characterized in that: Also includes: an oxygen sensor disposed between an exhaust end of the supercharger and an intake end of the cDPF; a first urea injector, which is disposed between the oxygen sensor and the intake end of the cDPF; a second urea injector, which is disposed on the cDPF and is used to inject urea into the cDPF; A differential pressure sensor, which is arranged at the air inlet and outlet ends of the cDPF; A first NOx sensor and a second NOx sensor disposed between an outlet end of the cDPF and an inlet end of the aSCR and the ASC and at an outlet end of the aSCR and the ASC; and An SCR injection system module is disposed between the gas outlet end of the cDPF and the first NOx sensor; The oxygen sensor, the first urea injector, the second urea injector, the differential pressure sensor, the first NOx sensor, the second NOx sensor, and the SCR injection system module are all electrically connected to the control system.

4. The integrated system of hydrogen injector and hydrogen rail for hydrogen internal combustion engine as claimed in claim 1, characterized in that: The invention also comprises a plurality of mounting bolt holes, which are arranged on the hydrogen rail and used for mounting the integrated body of the hydrogen rail and the plurality of hydrogen injectors on the body of the internal combustion engine.

5. The integrated system of hydrogen injector and hydrogen rail for hydrogen internal combustion engine as claimed in claim 3, characterized in that: The hydrogen supply system sends the hydrogen in the hydrogen tank into the hydrogen rail after reducing the pressure through the pressure reducing valve. The hydrogen rail can sense the working state of the hydrogen injector of the internal combustion engine according to the control system and determine the injection amount of the hydrogen injector.

6. The integrated system of hydrogen injector and hydrogen rail for hydrogen internal combustion engine as claimed in claim 5, characterized in that: The hydrogen injector can automatically inject hydrogen into the hydrogen internal combustion engine for injection according to the instruction of the control system.

7. The integrated system of hydrogen injector and hydrogen rail for hydrogen internal combustion engine as claimed in claim 5, characterized in that: The hydrogen demand between the hydrogen injector and the hydrogen rail follows the following mathematical model: Flow equation: The hydrogen flow rate (Q) output by the hydrogen injector can be expressed by the following formula: Q = A*υ; Where Q: hydrogen demand (unit: m3 / s), A: nozzle cross-sectional area (unit: m2), η: injection efficiency (dimensionless); Gas flow rate equation: Hydrogen flow rate (υ) can be calculated by the following formula: Where P: injection pressure of the injector (unit: Pa), ρ: hydrogen density (unit: kg / m3); Substituting the formula for flow rate into the flow equation yields: Efficiency equation: In practical applications, the injection efficiency (η) can be introduced to consider the effectiveness of the system:

8. The integrated system of hydrogen injector and hydrogen rail for hydrogen internal combustion engine as claimed in claim 7, characterized in that: By adjusting the cross-sectional area of ​​the nozzle, the injection pressure of the injector and the injection efficiency, different hydrogen demands between the hydrogen injector and the hydrogen rail can be met.

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