CN116220957A - Ammonia alcohol engine system and fuel supply control method thereof - Google Patents

Ammonia alcohol engine system and fuel supply control method thereof Download PDF

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Publication number
CN116220957A
CN116220957A CN202310048138.8A CN202310048138A CN116220957A CN 116220957 A CN116220957 A CN 116220957A CN 202310048138 A CN202310048138 A CN 202310048138A CN 116220957 A CN116220957 A CN 116220957A
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CN
China
Prior art keywords
ammonia
alcohol
fuel tank
fuel
engine
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Pending
Application number
CN202310048138.8A
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Chinese (zh)
Inventor
王志
刘尚
林哲龙
张昊
王巍
刘伟
蔡开源
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Tsinghua University
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Tsinghua University
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Priority to CN202310048138.8A priority Critical patent/CN116220957A/en
Publication of CN116220957A publication Critical patent/CN116220957A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0206—Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Abstract

The present invention provides an ammonia alcohol engine system and a fuel supply control method thereof, the ammonia alcohol engine system comprises: the engine comprises a cylinder, an air inlet channel and an exhaust channel, wherein a combustion chamber is formed in the cylinder, the air inlet channel comprises an air inlet main pipe and an air inlet manifold, and the air inlet manifold is connected with the air inlet main pipe; the fuel supply module comprises an ammonia fuel tank, an alcohol fuel tank, an oil rail and a nozzle, wherein the ammonia fuel tank is connected with the alcohol fuel tank through a first pipeline, the alcohol fuel tank is connected with the oil rail through a second pipeline, and the nozzle is connected with the oil rail; the air inlet manifolds are connected with the air cylinders in a one-to-one correspondence mode. The ammonia fuel in the ammonia fuel tank is introduced into the alcohol fuel tank through the first pipeline to be mixed with the alcohol fuel, then the ammonia alcohol mixed fuel is introduced into the oil rail through the second pipeline, and the nozzles on the oil rail respectively spray the ammonia alcohol mixed fuel into each air inlet manifold or each air cylinder, so that the ammonia/alcohol fuel can be sprayed by using one set of nozzles and one oil rail on the premise of ensuring the power requirement of the whole automobile.

Description

Ammonia alcohol engine system and fuel supply control method thereof
Technical Field
The invention relates to the technical field of engines, in particular to an ammonia alcohol engine system and a fuel supply control method thereof.
Background
In the field of transportation, in order to improve the thermal efficiency of an engine and greatly reduce carbon dioxide emission, the engine adopts carbon-free fuels such as hydrogen, ammonia and the like as one of modes with higher feasibility. There are many limitations to the use of ammonia fuel or hydrogen fuel by the engine alone. For example, the cost of hydrogen production, storage and transportation is high, the safety is low, and the volumetric heating value is low; the combustion performance of ammonia is poor and the emission is high.
Because the flame speed of the alcohol is high, the heat value of the liquid injection volume is high, the problem of insufficient engine power caused by ammonia gas injection can be solved, and meanwhile, the combustion performance of ammonia is improved. Accordingly, in the related art, the combustion performance of ammonia, such as ammonia with alcohol, is improved by means of the ammonia fuel being burned with a liquid fuel having a high flame speed.
The common engine combusts ammonia fuel in two modes, namely, ammonia gas is premixed with gaseous fuel such as hydrogen or natural gas and the like, and the gaseous fuel is injected in a gaseous state, but the volumetric heat value of the gaseous fuel is lower, so that the power requirement of the whole engine is difficult to ensure; secondly, ammonia gas and liquid fuel are respectively and independently injected, but the method needs two sets of fuel injection systems, and a fuel rail, a gas rail and two sets of nozzles are difficult to arrange on a cylinder cover.
That is, the ammonia fuel utilization system in the existing engine is highly limited.
Disclosure of Invention
The invention provides an ammonia alcohol engine system, which utilizes a set of nozzles and an oil rail to realize the injection of ammonia alcohol fuel on the premise of ensuring the power demand of the whole automobile.
The embodiment of the invention also provides a fuel supply control method of the ammonia alcohol engine system.
The present invention provides an ammonia alcohol engine system comprising:
the engine comprises a cylinder, an air inlet channel and an exhaust channel, wherein a combustion chamber is formed in the cylinder, the air inlet channel comprises an air inlet main pipe and an air inlet manifold, and the air inlet manifold is connected with the air inlet main pipe;
the fuel supply module comprises an ammonia fuel tank, an alcohol fuel tank, an oil rail and a nozzle, wherein the ammonia fuel tank is connected with the alcohol fuel tank through a first pipeline, the alcohol fuel tank is connected with the oil rail through a second pipeline, and the nozzle is connected with the oil rail;
the air inlet manifolds are connected with the air cylinders in a one-to-one correspondence mode.
According to the ammonia alcohol engine system provided by the invention, the first pipeline is provided with the pressure reducing valve.
According to the ammonia alcohol engine system provided by the invention, the second pipeline is provided with the oil pump.
According to the ammonia alcohol engine system provided by the invention, the inlet end of the first pipeline is arranged at the upper part of the inner cavity of the ammonia fuel tank, the outlet end of the first pipeline is arranged at the upper part of the inner cavity of the alcohol fuel tank, and the inlet end of the second pipeline is arranged at the lower part of the inner cavity of the alcohol fuel tank.
According to the ammonia alcohol engine system provided by the invention, the nozzles are arranged in the air inlet manifold in a one-to-one correspondence manner; or the nozzles are arranged in the combustion chamber in a one-to-one correspondence.
The ammonia alcohol engine system provided by the invention further comprises a heat management system, wherein the heat management system comprises a heat exchanger and a cooling water tank, the heat exchanger is connected with the cooling water tank through a pipeline, and the heat exchanger is used for exchanging heat with ammonia fuel in the ammonia fuel tank.
According to the ammonia alcohol engine system provided by the invention, the thermal management system further comprises a thermostat, and the thermostat is respectively connected with the heat exchanger and the cooling water tank through pipelines.
The ammonia alcohol engine system provided by the invention further comprises an aftertreatment module, wherein the aftertreatment module is connected with the exhaust passage and is used for treating engine tail gas.
The present invention also provides a fuel supply control method based on the ammonia alcohol engine system as defined in any one of the above, comprising:
presetting an engine cooling water temperature set value T 0 Presetting an effective average pressure set point P of an engine 0 ；
Acquiring an engine cooling water temperature signal T 1 Determining an effective average pressure value P of an engine 1 ；
Will T 1 And T is 0 Comparison is carried out, P is 1 And P 0 And comparing, and controlling the opening and closing of the pressure reducing valve and the oil pump according to the comparison result.
According to the fuel supply control method of the ammonia alcohol engine system provided by the invention, the method for controlling the opening and closing of the pressure reducing valve and the oil pump according to the comparison result comprises the following steps:
when T is 1 Less than or equal to T 0 Or P 1 Less than or equal to P 0 When the pressure reducing valve is closed, the oil pump is electrified and pressurized, and the nozzle sprays oil;
when T is 1 Greater than T 0 And P is 1 Greater than P 0 And when the pressure reducing valve is opened, the oil pump is powered off, and the nozzle sprays oil.
According to the ammonia alcohol engine system provided by the invention, the ammonia fuel in the ammonia fuel tank is introduced into the alcohol fuel tank to be mixed with the alcohol fuel through the first pipeline, the ammonia alcohol mixed fuel is introduced into the oil rail through the second pipeline, and the nozzles on the oil rail respectively spray the ammonia alcohol mixed fuel into each air inlet manifold or each air cylinder, so that the injection of the ammonia/alcohol fuel can be realized by using one set of nozzles and one oil rail on the premise of ensuring the power requirement of the whole automobile.
According to the fuel supply control method of the ammonia alcohol engine system, the obtained engine cooling water temperature signal and the determined engine effective average pressure value are respectively compared with the preset engine cooling water temperature set value and the engine effective average pressure set value, and the opening and closing of the pressure reducing valve and the oil pump are controlled according to the comparison result, so that the mixing proportion of ammonia alcohol in the mixed fuel can be automatically controlled, and the injection mode of the nozzle can be adjusted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of an ammonia alcohol engine system (hidden thermal management system) provided by the present invention;
FIG. 2 is a schematic diagram of an embodiment of a thermal management system for an ammonia alcohol engine system provided by the present invention;
FIG. 3 is a schematic diagram of an embodiment of a fuel supply control method for an ammonia engine system provided by the present invention.
Reference numerals:
1. an engine; 101. a cylinder; 102. an air inlet channel; 1021. an air inlet main pipe; 1022. an intake manifold; 103. an exhaust passage; 2. an ammonia fuel tank; 3. an alcohol fuel tank; 4. an oil rail; 5. a nozzle; 6. a first pipeline; 7. a second pipeline; 8. a pressure reducing valve; 9. an oil pump; 10. a heat exchanger; 11. a cooling water tank; 12. a thermostat; 13. a water pump; 14. and a post-processing module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following describes an ammonia engine system and a fueling control method thereof in accordance with the present invention with reference to fig. 1-3.
As shown in FIG. 1, a schematic diagram of an embodiment of an ammonia engine system is provided. The ammonia alcohol engine system of the present embodiment includes:
the engine 1, the engine 1 includes a cylinder 101, an intake passage 102 and an exhaust passage 103, a combustion chamber is formed in the cylinder 101, wherein a piston top, a cylinder wall, a cylinder cover, a valve, a spark plug and the like together form the combustion chamber, the intake passage 102 includes an intake main pipe 1021 and an intake manifold 1022, and the intake manifold 1022 is connected with the intake main pipe 1021. The compression ratio of the engine 1 is more than or equal to 15, and the ignition energy of the spark plug is more than or equal to 90mJ;
the fuel supply module comprises an ammonia fuel tank 2, an alcohol fuel tank 3, oil rails 4 and nozzles 5, wherein the ammonia fuel tank 2 is connected with the alcohol fuel tank 3 through a first pipeline 6, the alcohol fuel tank 3 is connected with the oil rails 4 through a second pipeline 7, the nozzles 5 are connected with the oil rails 4, and in the embodiment, the number of the nozzles 5 corresponds to the number of the cylinders 101 one by one;
the intake manifolds 1022 are connected to the cylinders 101 in one-to-one correspondence.
Further, in order to achieve the state switching of the intake manifold 1022 and the exhaust passage 103, in the present embodiment, valves are provided between the intake manifold 1022 and the exhaust passage 103 and the cylinders 101, respectively, and by providing the valves, the connection state between the intake manifold 1022 and the exhaust passage 103 and the cylinders 101 can be switched between the on state and the off state. The mixture of the ammonia alcohol mixed fuel and air enters the cylinder 101 from the intake manifold 1022 through a valve, and a spark plug (not shown) is ignited by spark to ignite the combustible mixture in the cylinder 101, so as to push the piston to do work.
The number of the cylinders 101 may be one or plural, and the number of the nozzles 5 and the intake manifold 1022 may be set in one-to-one correspondence with the number of the cylinders 101, and in this embodiment, the number of the cylinders 101 is four as an example.
The ammonia fuel in the ammonia fuel tank 2 is introduced into the alcohol fuel tank 3 through the first pipeline 6 to be mixed with the alcohol fuel, then the ammonia alcohol mixed fuel is introduced into the oil rail 4 through the second pipeline 7, and the nozzles 5 on the oil rail 4 are used for spraying the ammonia alcohol mixed fuel into the air inlet manifolds 1022 or the air cylinders 101 respectively, so that the injection of the ammonia alcohol mixed fuel can be realized by using one set of nozzles 5 and one oil rail 4 on the premise of ensuring the power requirement of the whole automobile.
In the present embodiment, as shown in fig. 1, a pressure reducing valve 8 is provided in the first pipe 6. By adjusting the opening of the pressure reducing valve 8, the pressure of the ammonia gas leaving the ammonia fuel tank 2 through the first pipeline 6 can be adjusted, so that the amount of ammonia gas dissolved into the alcohol fuel is adjusted, and the adjustment of the ammonia-alcohol ratio in the mixed fuel is realized.
In the present embodiment, as shown in fig. 1, an oil pump 9 is provided on the second pipe 7. The pressure of the mixed fuel in the second pipe 7 can be regulated by the oil pump 9, and the fuel in the alcohol fuel tank 3 can be pressurized by the oil pump 9 and then enter the rail 4 without introducing high-pressure ammonia gas into the alcohol fuel tank 3. In the present embodiment, the oil pump 9 is in a normally-on state when not energized. In some embodiments, if the oil pump 9 is in a normally closed state under the condition of no power on, the oil rail 4 is connected with two pipelines, one pipeline is a second pipeline 7, the other pipeline is directly communicated with the alcohol fuel tank 3 without passing through the oil pump 9, the inlet end of the pipeline is also positioned at the lower part in the inner cavity of the alcohol fuel tank 3, a valve is arranged on the pipeline, and the on-off of the pipeline can be controlled through the valve.
As shown in fig. 1, in the present embodiment, the inlet end of the first pipe 6 is provided at the upper portion of the inner cavity of the ammonia fuel tank 2, the outlet end of the first pipe 6 is provided at the upper portion of the inner cavity of the alcohol fuel tank 3, and the inlet end of the second pipe 7 is provided at the lower portion of the inner cavity of the alcohol fuel tank 3. In the case where the ammonia fuel and the alcohol fuel are contained in the ammonia fuel tank 2 and the alcohol fuel tank 3, respectively, the inlet and outlet ends of the first pipe 6 can be positioned above the fuel level, and the inlet end of the second pipe 7 can be positioned below the fuel level. In this way, in practice, since the fuel injection needs to build a certain pressure in the fuel rail 4, ranging from 0.4MPa to 1.0MPa, the pressure in the fuel rail 4 can be built up in the alcohol fuel tank 3 by high-pressure ammonia, the upper portion of the inner cavity of the alcohol fuel tank 3 is filled with high-pressure ammonia, and the liquid level of the fuel in the inner cavity of the alcohol fuel tank 3 is squeezed, so that the fuel with a certain pressure enters the fuel rail 4 through the second pipeline 7. Obviously, without introducing high-pressure ammonia gas into the alcohol fuel tank 3, the fuel in the alcohol fuel tank 3 may be pressurized by the oil pump 9 and then enter the rail 4.
In this embodiment, the arrangement of the nozzles 5 can be made in two ways:
mode one: the nozzles 5 are arranged in the intake manifold 1022 in a one-to-one correspondence manner, and the injection mode is port injection at this time;
mode two: the nozzles 5 are arranged in the combustion chamber in a one-to-one correspondence manner, at this time, the injection mode is in-cylinder direct injection, the oil pump 9 is a high-pressure oil pump, and the oil pump 9 is always in a working state when the engine 1 works.
As shown in fig. 1 and 2, in the present embodiment, the ammonia alcohol engine system further includes a heat management system including a heat exchanger 10 and a cooling water tank 11, the heat exchanger 10 is connected to the cooling water tank 11 through a pipe, and the heat exchanger 10 is used for heat exchange with the ammonia fuel in the ammonia fuel tank 2. In the present embodiment, the heat exchanger 10 is provided on the outer wall of the ammonia fuel tank 2 to facilitate heat exchange with the ammonia fuel in the ammonia fuel tank 2. The heat exchanger 10 can heat the ammonia fuel in the ammonia fuel tank 2 to promote vaporization of the liquid ammonia, thereby ensuring the supply amount of the ammonia fuel.
As shown in fig. 2, in the present embodiment, the thermal management system further includes a thermostat 12, and the thermostat 12 is connected to the heat exchanger 10 and the cooling water tank 11 through pipes, respectively, wherein a water pump 13 is provided on the pipe connected to the cooling water tank 11 for driving the cooling water to flow. According to the control strategy of the engine 1, when the main valve of the thermostat 12 is opened, cooling water of the engine 1 flows through the heat exchanger 10 outside the ammonia fuel tank 2 and then flows into the cooling water tank 11 to heat liquid ammonia, so that the gasification speed of liquid ammonia is increased, and the supply of ammonia fuel is ensured; when the main valve of the thermostat 12 is closed, the cooling water of the engine 1 does not flow through the heat exchanger 10 and the cooling water tank 11 outside the ammonia fuel tank 2, so that the heat dissipation capacity is reduced, and the heat engine speed of the engine is ensured. The control strategy of the thermostat 12 is the same as that of the thermostat 12 of the general engine 1.
As shown in fig. 1, in the present embodiment, the ammonia engine system further includes an aftertreatment module 14, where the aftertreatment module 14 is connected to the exhaust passage 103, and the aftertreatment module 14 is configured to treat exhaust gas (including nitrogen oxides, unburned hydrocarbons, unburned ammonia, carbon monoxide, and other harmful pollutants) of the engine 1. When the engine 1 is stoichiometric combustion, the aftertreatment module 14 includes an oxygen sensor, a three-way catalytic converter; if the engine 1 is lean-burn, the aftertreatment module 14 includes an oxidation-catalytic converter, a selective catalytic reducer, and an ammonia-selective oxidizer.
In addition, the ammonia alcohol engine system of the present embodiment further includes a controller, i.e. an electronic control unit, which is signal-connected to the spark plug, the nozzle 5, the oxygen sensor, the pressure reducing valve 8 and other sensors and actuators necessary for the engine 1, for monitoring the operation state of the engine 1 and issuing corresponding control instructions.
In the invention, the alcohol fuel mainly refers to methanol, ethanol or a mixed fuel thereof, and can be other liquid alcohols or liquid mixed fuels thereof without creative labor, and the alcohol fuel is replaced by gasoline fuel.
As can be seen from the description of the above embodiments, the ammonia alcohol engine system provided by the present invention further has the following advantages: the ammonia and the alcohol are burnt, and the characteristic that the fuel such as methanol is easy to preignite can be limited by utilizing the chemical inertia of the ammonia, so that the occurrence of super knocking and damage to the engine 1 can be prevented; the combustion performance of ammonia can be improved by utilizing the characteristic of high flame speed of fuel such as methanol, ethanol and the like.
Example 2
The present invention also provides a fuel supply control method based on an ammonia alcohol engine system as in embodiment 1, including:
presetting a cooling water temperature set value T of an engine 1 0 Presetting an effective average pressure set point P for the engine 1 0 T is as follows 0 And P 0 The value of (a) may be a constant value, or may be a value that fluctuates up and down according to the actual situation, or may be a range including an upper bound and a lower bound (a hysteresis effect is generated to make the output signal more stable). In the present embodiment, T is 0 70 ℃ and P 0 Is exemplified for 0.5 MPa;
acquiring a cooling water temperature signal T of the engine 1 1 Determining an effective average pressure value P of the engine 1 1 ；
Will T 1 And T is 0 Comparison (70 ℃ C.), P 1 And P 0 (0.5 MPa), and opening and closing of the pressure reducing valve 8 and the oil pump 9 are controlled based on the comparison result.
Specifically, the method of controlling opening and closing of the pressure reducing valve 8 and the oil pump 9 according to the comparison result includes:
when T is 1 Less than or equal to T 0 (70 ℃ C.) or P 1 Less than or equal to P 0 When the pressure is (0.5 MPa), the controller sends out an instruction to close the pressure reducing valve 8, the controller sends out an instruction to connect with the power supply of the oil pump 9, the fuel in the alcohol fuel tank 3 enters the oil rail 4 after being pressurized by the oil pump 9, and the nozzle 5 sprays oil;
when T is 1 Greater than T 0 (70 ℃ C.) and P 1 Greater than P 0 When (0.5 MPa), the controller sends out an instruction to open the pressure reducing valve 8, the controller sends out an instruction to be connected with a power supply of the oil pump 9, high-pressure ammonia gas at the upper part of the inner cavity of the alcohol fuel tank 3 extrudes the liquid level, high-pressure fuel in the second pipeline 7 directly enters the oil rail 4, and the nozzle 5 sprays oil.
In addition, the controller may also issue control commands to the nozzles 5 based on the operating conditions of the engine 1, such that the fuel injected by the nozzles 5 is mixed with air in the intake manifold 1022 and into the cylinder 101.
According to the fuel supply control method of the ammonia alcohol engine system, the obtained cooling water temperature signal of the engine 1 and the determined effective average pressure value of the engine 1 are respectively compared with the preset cooling water temperature set value of the engine 1 and the preset effective average pressure set value of the engine 1, and the opening and closing of the pressure reducing valve 8 and the oil pump 9 are controlled according to the comparison result, so that the mixing proportion of ammonia alcohol in the mixed fuel can be automatically controlled, and the injection mode of the nozzle 5 can be adjusted.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An ammonia engine system, comprising:
the engine comprises a cylinder, an air inlet channel and an exhaust channel, wherein a combustion chamber is formed in the cylinder, the air inlet channel comprises an air inlet main pipe and an air inlet manifold, and the air inlet manifold is connected with the air inlet main pipe;
the fuel supply module comprises an ammonia fuel tank, an alcohol fuel tank, an oil rail and a nozzle, wherein the ammonia fuel tank is connected with the alcohol fuel tank through a first pipeline, the alcohol fuel tank is connected with the oil rail through a second pipeline, and the nozzle is connected with the oil rail;
the air inlet manifolds are connected with the air cylinders in a one-to-one correspondence mode.
2. The ammonia engine system of claim 1, wherein the first conduit is provided with a pressure relief valve.
3. The ammonia engine system of claim 1, wherein the second conduit is provided with an oil pump.
4. The ammonia alcohol engine system of claim 1, wherein the inlet end of the first conduit is disposed in an upper portion of the interior cavity of the ammonia fuel tank, the outlet end of the first conduit is disposed in an upper portion of the interior cavity of the alcohol fuel tank, and the inlet end of the second conduit is disposed in a lower portion of the interior cavity of the alcohol fuel tank.
5. The ammonia engine system of claim 1, wherein the nozzles are disposed in the intake manifold in a one-to-one correspondence; or the nozzles are arranged in the combustion chamber in a one-to-one correspondence.
6. The ammonia alcohol engine system according to any one of claims 1-5, further comprising a thermal management system including a heat exchanger and a cooling water tank, the heat exchanger being connected to the cooling water tank by a conduit, the heat exchanger being configured to exchange heat with ammonia fuel in the ammonia fuel tank.
7. The ammonia engine system of claim 6, wherein the thermal management system further comprises a thermostat connected with the heat exchanger and the cooling water tank, respectively, by piping.
8. The ammonia engine system according to any one of claims 1-5, further comprising an aftertreatment module coupled to the exhaust passage, the aftertreatment module configured to treat engine exhaust.
9. A fuel supply control method based on the ammonia alcohol engine system according to any one of claims 1 to 8, characterized by comprising:
presetting an engine cooling water temperature set value T 0 Presetting an effective average pressure set point P of an engine 0 ；
Acquiring an engine cooling water temperature signal T 1 Determining an effective average pressure value P of an engine 1 ；
Will T 1 And T is 0 Comparison is carried out, P is 1 And P 0 And comparing, and controlling the opening and closing of the pressure reducing valve and the oil pump according to the comparison result.
10. The fuel supply control method of an ammonia alcohol engine system according to claim 9, characterized in that the method of controlling opening and closing of the pressure reducing valve and the oil pump according to the comparison result includes:
when T is 1 Less than or equal to T 0 Or P 1 Less than or equal to P 0 When the pressure reducing valve is closed, the oil pumpElectrifying and pressurizing, and spraying oil by a nozzle;
when T is 1 Greater than T 0 And P is 1 Greater than P 0 And when the pressure reducing valve is opened, the oil pump is powered off, and the nozzle sprays oil.
CN202310048138.8A 2023-01-31 2023-01-31 Ammonia alcohol engine system and fuel supply control method thereof Pending CN116220957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310048138.8A CN116220957A (en) 2023-01-31 2023-01-31 Ammonia alcohol engine system and fuel supply control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310048138.8A CN116220957A (en) 2023-01-31 2023-01-31 Ammonia alcohol engine system and fuel supply control method thereof

Publications (1)

Publication Number Publication Date
CN116220957A true CN116220957A (en) 2023-06-06

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Application Number Title Priority Date Filing Date
CN202310048138.8A Pending CN116220957A (en) 2023-01-31 2023-01-31 Ammonia alcohol engine system and fuel supply control method thereof

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