CN114576028B - In-cylinder direct-injection ammonia engine with hydrogen and control method thereof - Google Patents
In-cylinder direct-injection ammonia engine with hydrogen and control method thereofInfo
- Publication number
- CN114576028B CN114576028B CN202111593332.1A CN202111593332A CN114576028B CN 114576028 B CN114576028 B CN 114576028B CN 202111593332 A CN202111593332 A CN 202111593332A CN 114576028 B CN114576028 B CN 114576028B
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- hydrogen
- ammonia
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- volume flow
- cylinder
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 151
- 239000001257 hydrogen Substances 0.000 title claims abstract description 109
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 109
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 67
- 238000002347 injection Methods 0.000 title claims abstract description 56
- 239000007924 injection Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000007789 gas Substances 0.000 claims abstract description 36
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 5
- 238000002485 combustion reaction Methods 0.000 claims description 33
- 230000003197 catalytic effect Effects 0.000 claims description 15
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 13
- 239000003063 flame retardant Substances 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 239000002737 fuel gas Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000005461 lubrication Methods 0.000 abstract description 4
- 239000007921 spray Substances 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000003795 desorption Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention provides a hydrogen-doped in-cylinder direct injection ammonia engine and a control method thereof, and particularly relates to a direct injection ammonia engine system based on a reciprocating engine valve mechanism and a control method for adjusting the hydrogen direct injection quantity and the ammonia direct injection quantity according to an engine rotating speed signal. The invention combines the valve mechanism of the reciprocating engine with the ammonia and hydrogen supply pipelines, and adopts the concave wheel shaft to realize upward movement air intake of the valve, namely, the in-cylinder direct injection of ammonia and hydrogen can be realized only by the movement of the valve mechanism. In addition, compared with the existing gas nozzle, the device does not need to consider the problems of nozzle lubrication, cooling and the like, and solves the problem that the existing ammonia engine is difficult to directly spray in a cylinder. The invention mainly uses the output signal of the engine speed sensor as the basis to judge the running condition of the engine, reasonably controls the injection strategy and realizes the stable and efficient running of the ammonia engine.
Description
Technical Field
The invention provides a hydrogen-doped in-cylinder direct injection ammonia engine and a control method thereof, in particular relates to an in-cylinder direct injection engine system based on a reciprocating engine valve mechanism and a control method thereof, and belongs to the field of internal combustion engines.
Background
With increasing stricter emissions regulations and increasing importance of carbon emissions in various countries and regions of the world, engines fuelled with clean energy have become an important point of research. Ammonia is a promising clean energy carrier and fuel because of its harmless environmental combustion, only discharges water and nitrogen, etc., but ammonia as engine fuel has the problems of higher ignition point and minimum ignition energy, slow combustion speed, low combustion temperature, etc., so that it is necessary to use pilot fuel. Common pilot fuels include acetylene, dimethyl ether, gasoline, diesel oil, hydrogen and the like, however, only hydrogen is a carbon-free green pilot fuel, the ignition energy of the hydrogen is extremely low, the ignition fuel has the characteristics of wide combustion limit, high flame propagation speed, high combustion temperature and the like, and the complementation of the ammonia-hydrogen combustion performance can be achieved by using the hydrogen as the pilot fuel of the ammonia gas.
The ammonia engine adopts a direct injection mode in a cylinder, so that the charging efficiency, the thermal efficiency and the economy of the engine can be improved, and abnormal combustion such as knocking can be restrained. However, the direct injection device in the cylinder is in direct contact with the high-temperature and high-pressure gas in the cylinder, and the requirements on heat resistance, sealing performance, durability, cooling and the like are more strict, so that the development of the ammonia engine is slow.
Based on the problems faced by the in-cylinder direct injection ammonia engine, the invention combines a valve mechanism of a reciprocating engine with ammonia and hydrogen supply pipelines, and simultaneously adopts a concave wheel shaft to realize upward movement air inlet of a valve, namely, the in-cylinder direct injection of ammonia and hydrogen is realized only through the movement of the valve mechanism. In addition, compared with the existing gas nozzle, the device does not need to consider the problems of nozzle lubrication, cooling and the like, and solves the problem that the existing ammonia engine is difficult to directly spray in a cylinder. In the device, the problems of lubrication, cooling and the like of a gas nozzle do not need to be considered in the operation process of the valve mechanism, and the ammonia gas and hydrogen gas injection control can be realized only through the mechanical movement of the valve group, so that the device has the characteristics of long service life, good durability and the like.
Disclosure of Invention
The invention provides a solution to solve the problems faced by the in-cylinder direct injection ammonia engine, which is as follows:
The invention provides a hydrogen-doped in-cylinder direct-injection ammonia engine system and a control method thereof based on a valve mechanism of a four-stroke reciprocating internal combustion engine and a two-stroke reciprocating internal combustion engine. The present invention improves the thermal efficiency of an ammonia engine by adding hydrogen to the ammonia engine. The invention realizes the direct injection of hydrogen and ammonia in the cylinder by combining the valve mechanism with the ammonia and the hydrogen supply pipeline, and solves the problem that the existing ammonia engine is difficult to directly inject in the cylinder. Meanwhile, the invention mainly uses the output signal of the engine speed sensor as the basis to judge the running condition of the engine, reasonably controls the injection strategy and realizes the stable and efficient running of the ammonia engine.
A hydrogen-loaded in-cylinder direct injection ammonia engine, comprising: a hydrogen inlet pipeline P1 is provided with a hydrogen cylinder 1, a hydrogen pressure reducing valve 2, a hydrogen volume flow controller 3 and a hydrogen flame-retardant valve 4 in sequence; an ammonia gas inlet management P2, on which an ammonia gas cylinder 5, an ammonia gas pressure reducing valve 6, an ammonia gas volume flow controller 7 and an ammonia gas flame-retardant valve 8 are arranged in sequence; an air inlet pipeline P3 is sequentially provided with an air filter 9, an air volume flow sensor 10, an air inlet pressure stabilizing chamber 11 and a one-way valve 12; an exhaust line P4 on which an exhaust gas pressure stabilization chamber 13, a NOx concentration sensor 14, an NSR catalytic system 15 are mounted; valve group mechanism: valve 16, rocker 17, concave wheel 18, valve spring 19; the spark plug 20, the rotation speed sensor 21 and the electronic control unit ECU22, the ECU22 interacts with the hydrogen volume flow controller 3 with a signal a, interacts with the ammonia volume flow controller 7 with a signal b and interacts with the air volume flow sensor 10 with a signal c,
The electronic control unit ECU22 is connected with the NOx concentration sensor 14 and obtains an exhaust NOx concentration signal d;
The electronic control unit ECU22 is connected with the NSR catalytic system 15 and controls the adsorption and desorption of NOx by the NSR catalytic system through an NSR catalytic signal e;
the electronic control unit ECU22 is connected with the rotation speed sensor 21 and obtains a rotation speed signal f; the electronic control unit ECU22 is connected with the spark plug 20 and controls the ignition timing of the spark plug through a spark plug ignition signal g;
a control method of a hydrogen-doped in-cylinder direct injection ammonia engine is mainly characterized by comprising the following steps:
the electronic control unit ECU22 is connected with the rotation speed sensor 21 and obtains a rotation speed signal f to obtain a rotation speed n:
When n=0 is changed into n=0, and the starting stage is two seconds later, pure hydrogen is adopted, the ECU22 outputs a signal a to the hydrogen volume flow controller 3, meanwhile, the rocker arm 17 is driven to move through the concave wheel 18, the valve spring 19 stretches to control the valve 16 to move upwards to open a fuel gas injection port, and the valve spring 19 drives the rocker arm 17 to reset along with the rotation of the concave position of the concave wheel 18 through the rocker arm 17, so that the injection process is completed. The ignition plug 20 ignites the in-cylinder mixture after receiving the ignition plug ignition signal g sent from the ECU22, and the engine operation is realized.
When n is more than 0 and less than 1500rpm, ammonia-hydrogen mixed combustion is adopted, the ECU22 outputs a signal a, a signal b and a signal c to the hydrogen volume flow controller 3, the ammonia volume flow controller 7 and the air volume flow sensor 10 respectively, ammonia-hydrogen mixed gas is regulated to be mixed and combusted according to the equivalent ratio of 1, meanwhile, the rocker arm 17 is driven to move through the concave wheel 18, the valve spring 19 stretches to control the valve 16 to move upwards to open a gas injection port, and the valve spring 19 drives the rocker arm 17 to reset along with the concave position of the concave wheel 18 to finish the injection process. The amount of hydrogen injected into the cylinder by direct injection is based on the total volume of the mixture in the cylinder at the end of the intake process. The ignition plug 20 ignites the in-cylinder mixture after receiving the ignition plug ignition signal g sent from the ECU22, and the engine operation is realized. Wherein the hydrogen volume percent
When n is more than or equal to 1500 and less than 3000rpm, ammonia-hydrogen mixed combustion is adopted, the ECU 22 outputs a signal a, a signal b and a signal c to the hydrogen volume flow controller 3, the ammonia volume flow controller 7 and the air volume flow sensor 10 respectively, ammonia-hydrogen mixed gas is regulated to be mixed and combusted according to the equivalent ratio of 1, meanwhile, the rocker arm 17 is driven to move through the concave wheel 18, the valve spring 19 stretches to control the valve 16 to move upwards to open a gas injection port, and the valve spring 19 drives the rocker arm 17 to reset along with the rotation of the concave wheel 18 at the concave position of the rocker arm 17, so that the injection process is completed. The ignition plug 20 ignites the in-cylinder mixture after receiving the ignition plug ignition signal g sent from the ECU 22, and the engine operation is realized. The volume of the hydrogen injected into the cylinder by direct injection is based on the total volume of the mixed gas in the cylinder at the end of the air inlet process, wherein the volume percentage of the hydrogen
When n is more than or equal to 3000 and less than 4500rpm, ammonia-hydrogen mixed combustion is adopted, the ECU 22 outputs a signal a, a signal b and a signal c to the hydrogen volume flow controller 3, the ammonia volume flow controller 7 and the air volume flow sensor 10 respectively to adjust ammonia-hydrogen mixed gas to be mixed and combusted according to the equivalent ratio of 1, meanwhile, the concave wheel 18 drives the rocker arm 17 to move, the valve spring 19 stretches to control the valve 16 to move upwards to open a gas injection port, and the valve spring 19 drives the rocker arm 17 to reset along with the concave position of the concave wheel 18 to finish the injection process. The ignition plug 20 ignites the in-cylinder mixture after receiving the ignition plug ignition signal g sent from the ECU 22, and the engine operation is realized. The volume of the hydrogen injected into the cylinder by direct injection is based on the total volume of the mixed gas in the cylinder at the end of the air inlet process, wherein the volume percentage of the hydrogen
When n is larger than or equal to 4500rpm, the rotating speed is too high, and in order to ensure safety, the ECU 22 outputs a signal a, a signal b and a signal c to the hydrogen volume flow controller 3, the ammonia volume flow controller 7 and the air volume flow sensor 10 respectively, so that the volume flow of supplied hydrogen, ammonia and air is 0.
The beneficial effects of the invention are mainly as follows: the valve mechanism is controlled by mechanical movement only in the running process, the problems of lubrication, cooling and the like of the gas nozzle are not considered, and the valve mechanism has long service life and better durability. Meanwhile, the invention mixes the hydrogen as the pilot fuel into the ammonia engine for combustion, the combustion performance of the hydrogen and the ammonia is complementary, the combustion efficiency of the ammonia is improved, and the ammonia engine is enabled to operate efficiently. The invention adopts the method of reasonably regulating and controlling the components of the mixed gas and the excess air coefficient by selectively blending the hydrogen according to the running speed of the engine, thereby ensuring the stable running of the hydrogen-doped ammonia engine.
Drawings
FIG. 1. The construction and principle of operation of the present invention
In fig. 1: a hydrogen inlet pipeline P1 is provided with a hydrogen cylinder 1, a hydrogen pressure reducing valve 2, a hydrogen volume flow controller 3 and a hydrogen flame-retardant valve 4 in sequence; an ammonia gas inlet management P2, on which an ammonia gas cylinder 5, an ammonia gas pressure reducing valve 6, an ammonia gas volume flow controller 7 and an ammonia gas flame-retardant valve 8 are arranged in sequence; an air inlet pipeline P3 is sequentially provided with an air filter 9, an air volume flow sensor 10, an air inlet pressure stabilizing chamber 11 and a one-way valve 12; an exhaust line P4 on which an exhaust gas pressure stabilization chamber 13, a NOx concentration sensor 14, an NSR catalytic system 15 are mounted; valve group mechanism: valve 16, rocker 17, concave wheel 18, valve spring 19; the spark plug 20, the rotation speed sensor 21 and the electronic control unit ECU22, the ECU22 interacts with the hydrogen volume flow controller 3 with a signal a, interacts with the ammonia volume flow controller 7 with a signal b and interacts with the air volume flow sensor 10 with a signal c,
Detailed Description
The invention is further described with reference to the drawings and detailed description which follow:
Fresh air enters the combustion chamber through the air inlet pipeline P3 in the whole machine operation process sequentially through the air filter 9, the air volume flow sensor 10, the air inlet pressure stabilizing chamber 11 and the one-way valve 12, and the one-way valve 12 controls the fresh air to not flow out of the combustion chamber reversely and only enter the combustion chamber through the air inlet pipeline P3.
The electronic control unit ECU22 is connected with the NOx concentration sensor 14 and obtains an exhaust NOx concentration signal d;
The electronic control unit ECU22 is connected with the NSR catalytic system 15 and controls the adsorption and desorption of NOx by the NSR catalytic system through an NSR catalytic signal e;
the electronic control unit ECU22 is connected with the rotation speed sensor 21 and obtains a rotation speed signal f;
the electronic control unit ECU22 is connected with the spark plug 20 and controls the spark plug ignition timing through a spark plug ignition signal g
The electronic control unit ECU22 is connected with the rotation speed sensor 21 and obtains a rotation speed signal f to obtain a rotation speed n:
When n=0 is changed into n not equal to 0, the starting stage is adopted, pure hydrogen is adopted, the ECU22 outputs a signal a to the hydrogen volume flow controller 3, hydrogen enters the combustion chamber after passing through the hydrogen cylinder 1, the hydrogen pressure reducing valve 2, the hydrogen volume flow controller 3 and the hydrogen flame-retardant valve 4, meanwhile, the concave wheel 18 drives the rocker arm 17 to move, the valve spring 19 stretches to control the valve 16 to move upwards to open a gas injection port, the valve spring 19 drives the rocker arm 17 to reset along with the concave position of the concave wheel 18 to finish the injection process, and the valve spring 19 stretches to control the valve 16 to move upwards to open the gas injection port. The ignition plug 20 ignites the in-cylinder mixture after receiving the ignition plug ignition signal g sent from the ECU22, and the engine operation is realized.
When n is more than 0 and less than 1500rpm, ammonia-hydrogen mixed combustion is adopted, the ECU22 outputs a signal a, a signal b and a signal c to the hydrogen volume flow controller 3, the ammonia volume flow controller 7 and the air volume flow sensor 10 respectively, ammonia-hydrogen mixed gas is regulated to be mixed and combusted according to the equivalent ratio of 1, hydrogen enters a combustion chamber after passing through the hydrogen cylinder 1, the hydrogen pressure reducing valve 2, the hydrogen volume flow controller 3 and the hydrogen flame-retardant valve 4, ammonia enters the combustion chamber after passing through the ammonia cylinder 5, the ammonia pressure reducing valve 6, the ammonia volume flow controller 7 and the ammonia flame-retardant valve 8, meanwhile, the rocker arm 17 is driven to move through the concave wheel 18, the valve spring 19 stretches to control the valve 16 to move upwards to open a fuel injection port, the valve spring 19 drives the rocker arm 17 to reset along with the concave position of the concave wheel 18 to complete the injection process. The amount of hydrogen injected into the cylinder by direct injection is based on the total volume of the mixture in the cylinder at the end of the intake process. The ignition plug 20 ignites the in-cylinder mixture after receiving the ignition plug ignition signal g sent from the ECU22, and the engine operation is realized. Wherein the hydrogen volume percent
When n is more than or equal to 1500 and less than 3000rpm, ammonia-hydrogen mixed combustion is adopted, the ECU22 outputs a signal a, a signal b and a signal c to the hydrogen volume flow controller 3, the ammonia volume flow controller 7 and the air volume flow sensor 10 respectively, ammonia-hydrogen mixed gas is regulated to be mixed and combusted according to the equivalent ratio of 1, hydrogen enters a combustion chamber after passing through the hydrogen cylinder 1, the hydrogen pressure reducing valve 2, the hydrogen volume flow controller 3 and the hydrogen flame-retardant valve 4, ammonia enters the combustion chamber after passing through the ammonia cylinder 5, the ammonia pressure reducing valve 6, the ammonia volume flow controller 7 and the ammonia flame-retardant valve 8, meanwhile, the rocker arm 17 is driven to move through the concave wheel 18, the valve spring 19 stretches to control the valve 16 to move upwards to open a fuel gas injection port, the valve spring 19 drives the rocker arm 17 to reset along with the concave position of the concave wheel 18 to complete the injection process. The ignition plug 20 ignites the in-cylinder mixture after receiving the ignition plug ignition signal g sent from the ECU22, and the engine operation is realized. The volume of the hydrogen injected into the cylinder by direct injection is based on the total volume of the mixed gas in the cylinder at the end of the air inlet process, wherein the volume percentage of the hydrogen
When n is more than or equal to 3000 and less than 4500rpm, ammonia-hydrogen mixed combustion is adopted, the ECU22 outputs a signal a, a signal b and a signal c to the hydrogen volume flow controller 3, the ammonia volume flow controller 7 and the air volume flow sensor 10 respectively, ammonia-hydrogen mixed gas is regulated to be mixed and combusted according to the equivalent ratio of 1, hydrogen enters a combustion chamber after passing through the hydrogen cylinder 1, the hydrogen pressure reducing valve 2, the hydrogen volume flow controller 3 and the hydrogen flame-retardant valve 4, ammonia enters the combustion chamber after passing through the ammonia cylinder 5, the ammonia pressure reducing valve 6, the ammonia volume flow controller 7 and the ammonia flame-retardant valve 8, meanwhile, the rocker arm 17 is driven to move through the concave wheel 18, the valve spring 19 stretches to control the valve 16 to move upwards to open the fuel injection port, the valve spring 19 drives the rocker arm 17 to reset along with the concave position of the concave wheel 18, and the injection process is completed. The ignition plug 20 ignites the in-cylinder mixture after receiving the ignition plug ignition signal g sent from the ECU22, and the engine operation is realized. The volume of the hydrogen injected into the cylinder by direct injection is based on the total volume of the mixed gas in the cylinder at the end of the air inlet process, wherein the volume percentage of the hydrogen
When n is larger than or equal to 4500rpm, the rotating speed is too high, and in order to ensure safety, the ECU22 outputs a signal a, a signal b and a signal c to the hydrogen volume flow controller 3, the ammonia volume flow controller 7 and the air volume flow sensor 10 respectively, so that the volume flow of supplied hydrogen, ammonia and air is 0.
The burned exhaust gas is discharged from the combustion chamber through the exhaust pipeline P4 sequentially through the exhaust pressure stabilizing chamber 13, the NOx concentration sensor 14 and the NSR catalytic system 15, and the electronic control unit ECU22 receives the NOx concentration signal d and sends out the NSR catalytic signal e to control the adsorption and desorption of the NSR catalytic system 15 on NOx.
Claims (1)
1. A control method of a hydrogen-doped in-cylinder direct injection ammonia engine is characterized in that the engine comprises the following steps: a hydrogen gas cylinder (1), a hydrogen gas pressure reducing valve (2), a hydrogen gas volume flow controller (3) and a hydrogen gas flame-retardant valve (4) are sequentially arranged on the hydrogen gas inlet pipeline P1; an ammonia gas inlet pipeline P2 is sequentially provided with an ammonia gas cylinder (5), an ammonia gas pressure reducing valve (6), an ammonia gas volume flow controller (7) and an ammonia gas flame-retardant valve (8); an air inlet pipeline P3 is sequentially provided with an air filter (9), an air volume flow sensor (10), an air inlet pressure stabilizing chamber (11) and a one-way valve (12); an exhaust pipeline P4, on which an exhaust pressure stabilizing chamber (13), a NOx concentration sensor (14) and an NSR catalytic system (15) are sequentially arranged; valve group mechanism: a valve (16), a rocker arm (17), a concave wheel (18) and a valve spring (19); the spark plug (20), the rotating speed sensor (21) and the electronic control unit ECU (22), wherein the ECU (22) is interacted with the hydrogen volume flow controller (3) by a signal a, is interacted with the ammonia volume flow controller (7) by a signal b and is interacted with the air volume flow sensor (10) by a signal c;
an electronic control unit ECU (22) is connected with the NOx concentration sensor (14) and obtains an exhaust NOx concentration signal d;
The electronic control unit ECU (22) is connected with the NSR catalytic system (15) and controls the NSR catalytic system to adsorb and desorb NOx through the NSR catalytic signal e;
The electronic control unit ECU (22) is connected with the rotating speed sensor (21) and obtains a rotating speed signal f;
an electronic control unit ECU (22) is connected with the spark plug (20) and controls the ignition timing of the spark plug through a spark plug ignition signal g;
The method specifically comprises the following steps:
The electronic control unit ECU (22) is connected with the rotation speed sensor (21) and obtains a rotation speed signal f to obtain a rotation speed n:
When n=0 is changed into n=0, and then the starting stage is started by pure hydrogen, the ECU (22) outputs a signal a to the hydrogen volume flow controller (3), meanwhile, the rocker arm (17) is driven to move through the concave wheel (18), the valve spring (19) stretches to control the valve (16) to move upwards to open the gas injection port, the rocker arm (17) is rotated along with the concave position of the concave wheel (18), and the valve spring (19) drives the rocker arm (17) to reset to finish the injection process; the spark plug (20) ignites the mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU (22) to realize the operation of the engine;
When n is more than 0 and less than 1500rpm, ammonia-hydrogen mixed combustion is adopted, an ECU (22) outputs a signal a, a signal b and a signal c to a hydrogen volume flow controller (3), an ammonia volume flow controller (7) and an air volume flow sensor (10) respectively to adjust ammonia-hydrogen mixed gas to be mixed and combusted according to the equivalent ratio of 1, meanwhile, a rocker arm (17) is driven to move through a concave wheel (18), a valve spring (19) stretches to control the valve (16) to move upwards to open a fuel gas injection port, the rocker arm (17) is rotated along with the concave position of the concave wheel (18), and the valve spring (19) drives the rocker arm (17) to reset to finish the injection process; the spark plug (20) ignites the mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU (22) to realize the operation of the engine; the volume of the hydrogen injected into the cylinder by direct injection is based on the total volume of the mixed gas in the cylinder at the end of the air inlet process, wherein the volume percentage of the hydrogen
When n is less than or equal to 1500 and less than 3000rpm, ammonia-hydrogen mixed combustion is adopted, an ECU (22) outputs a signal a, a signal b and a signal c to a hydrogen volume flow controller (3), an ammonia volume flow controller (7) and an air volume flow sensor (10) respectively to adjust ammonia-hydrogen mixed gas to be mixed and combusted according to an equivalent ratio of 1, meanwhile, a rocker arm (17) is driven to move through a concave wheel (18), a valve spring (19) stretches to control a valve (16) to move upwards to open a fuel gas injection port, the rocker arm (17) is rotated along with the concave position of the concave wheel (18), and the valve spring (19) drives the rocker arm (17) to reset to finish the injection process; the spark plug (20) ignites the mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU (22) to realize the operation of the engine; the volume of the hydrogen injected into the cylinder by direct injection is based on the total volume of the mixed gas in the cylinder at the end of the air inlet process, wherein the volume percentage of the hydrogen
When n is more than or equal to 3000 and less than 4500rpm, ammonia-hydrogen mixed combustion is adopted, an ECU (22) outputs a signal a, a signal b and a signal c to a hydrogen volume flow controller (3), an ammonia volume flow controller (7) and an air volume flow sensor (10) respectively to adjust ammonia-hydrogen mixed gas to be mixed and combusted according to an equivalent ratio of 1, meanwhile, a rocker arm (17) is driven to move through a concave wheel (18), a valve spring (19) stretches to control the valve (16) to move upwards to open a gas injection port, the rocker arm (17) is rotated along with the concave position of the concave wheel (18), and the valve spring (19) drives the rocker arm (17) to reset to finish the injection process; the spark plug (20) ignites the mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU (22) to realize the operation of the engine; the volume of the hydrogen injected into the cylinder by direct injection is based on the total volume of the mixed gas in the cylinder at the end of the air inlet process, wherein the volume percentage of the hydrogen
When n is larger than or equal to 4500rpm, the rotating speed is too high, and the ECU (22) outputs a signal a, a signal b and a signal c to the hydrogen volume flow controller (3), the ammonia volume flow controller (7) and the air volume flow sensor (10) respectively, so that the volume flow of supplied hydrogen, ammonia and air is 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111593332.1A CN114576028B (en) | 2021-12-23 | In-cylinder direct-injection ammonia engine with hydrogen and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111593332.1A CN114576028B (en) | 2021-12-23 | In-cylinder direct-injection ammonia engine with hydrogen and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114576028A CN114576028A (en) | 2022-06-03 |
| CN114576028B true CN114576028B (en) | 2024-07-02 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255560A (en) * | 2020-01-15 | 2020-06-09 | 北京工业大学 | Hydrogen-ammonia dual-fuel piston machine and control method |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255560A (en) * | 2020-01-15 | 2020-06-09 | 北京工业大学 | Hydrogen-ammonia dual-fuel piston machine and control method |
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