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WO2013172141A1 - Moteur à ammoniac - Google Patents

Moteur à ammoniac Download PDF

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Publication number
WO2013172141A1
WO2013172141A1 PCT/JP2013/061312 JP2013061312W WO2013172141A1 WO 2013172141 A1 WO2013172141 A1 WO 2013172141A1 JP 2013061312 W JP2013061312 W JP 2013061312W WO 2013172141 A1 WO2013172141 A1 WO 2013172141A1
Authority
WO
WIPO (PCT)
Prior art keywords
combustion chamber
ammonia
gas
cylinder
piston
Prior art date
Application number
PCT/JP2013/061312
Other languages
English (en)
Japanese (ja)
Inventor
政晴 石本
Original Assignee
岩井 好朗
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 岩井 好朗 filed Critical 岩井 好朗
Priority to JP2014515545A priority Critical patent/JP6078056B2/ja
Publication of WO2013172141A1 publication Critical patent/WO2013172141A1/fr

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Classifications

    • 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
    • F02M27/00—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like
    • F02M27/02—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like by catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/12—Engines characterised by precombustion chambers with positive ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/16—Chamber shapes or constructions not specific to sub-groups F02B19/02 - F02B19/10
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/10—Pistons  having surface coverings
    • F02F3/12—Pistons  having surface coverings on piston heads
    • 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
    • Y02T10/12—Improving ICE efficiencies
    • 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

Definitions

  • the present invention relates to an ammonia engine using ammonia gas as a fuel.
  • an ammonia engine has attracted attention as an engine using a renewable fuel from the viewpoint of environmental protection such as prevention of global warming.
  • the ammonia engine uses flame retardant ammonia gas as a fuel, it is necessary to devise measures for making the ammonia gas easily burnable.
  • the conventional ammonia engine arranges a plurality of spark plugs in the combustion chamber and generates ignition fire nuclei at a plurality of locations so that ammonia gas is easily burned (for example, Patent Document 1). reference).
  • an ammonia engine of the present invention is an ammonia engine in which ammonia gas is supplied as fuel into a combustion chamber of a cylinder.
  • the ammonia engine is disposed in the combustion chamber and uses the ammonia gas supplied into the combustion chamber.
  • a catalyst member that decomposes into nitrogen gas and hydrogen gas is provided.
  • the ammonia gas supplied into the combustion chamber of the cylinder is decomposed into nitrogen gas and hydrogen gas by coming into contact with the catalyst member. Combining with oxygen inside makes it easy to burn.
  • the volume of the combustion chamber is reduced by the volume of the catalyst member disposed in the combustion chamber and the compression ratio of the ammonia engine is increased, the temperature of the combustion chamber can be raised by the compression heat, and the ammonia gas By increasing the density, ammonia gas in contact with the catalyst member can be increased.
  • the ammonia gas supplied into the combustion chamber can be efficiently decomposed into easily combustible hydrogen gas, so that the combustion efficiency of the ammonia engine can be improved.
  • the catalyst member has a heat storage function for storing heat generated in the combustion chamber.
  • the ammonia gas can be decomposed more efficiently by the heat stored in the catalyst member, the combustion efficiency of the ammonia engine can be further improved.
  • the cylinder includes a cylinder liner formed in a cylindrical shape, a piston provided in the cylinder liner so as to be capable of reciprocating in the axial direction thereof, and an axial end of the cylinder liner disposed between the piston and the piston.
  • the catalyst member has a fixed catalyst portion attached to the cylinder head or the cylinder liner.
  • the reciprocation of the piston is greater than when attached to the piston on the movable side of the cylinder. It is possible to suppress the application of external force such as inertial force due to movement. Therefore, it is possible to prevent the catalyst member from being damaged during the driving of the ammonia engine.
  • the cylinder includes a cylinder liner formed in a cylindrical shape, a piston provided in the cylinder liner so as to be capable of reciprocating in the axial direction thereof, and an axial end of the cylinder liner disposed between the piston and the piston.
  • the catalyst member has a fixed side catalyst portion attached to the cylinder head or the cylinder liner, and the ammonia engine includes the fixed side catalyst. It is preferable to further include a heating device for heating the part. In this case, since the catalyst member has a fixed-side catalyst portion attached to the cylinder head or cylinder liner on the fixed side of the cylinder, the reciprocation of the piston is greater than when attached to the piston on the movable side of the cylinder.
  • the ammonia engine includes a heating device that heats the fixed catalyst portion, the fixed catalyst is heated by the heating device until the fixed catalyst portion can store heat generated in the combustion chamber after the ammonia engine is started. Part can be heated. Thereby, since ammonia gas can be decomposed
  • the ammonia engine further includes an ignition device attached to the cylinder head and having an ignition unit for igniting hydrogen gas decomposed from ammonia gas, and the hydrogen gas is disposed in the vicinity of the ignition unit of the fixed side catalyst unit. It is preferable that a pre-combustion chamber for burning is formed. In this case, hydrogen gas decomposed from ammonia gas in the pre-combustion chamber can be efficiently burned by the ignition unit.
  • At least one of a supply passage for supplying ammonia gas into the combustion chamber and an exhaust passage for discharging exhaust gas after combustion generated in the combustion chamber to the outside is provided in the fixed side catalyst portion. Is preferably formed. In this case, since the number of parts is reduced as compared with the case where the supply passage and / or the discharge passage are provided separately from the stationary catalyst portion, the configuration of the ammonia engine can be simplified.
  • the catalyst member further includes a movable catalyst part attached to an end surface of the piston on the combustion chamber side.
  • the volume of the combustion chamber is further reduced by the volume of the movable side catalyst portion, and the compression ratio of the ammonia engine is further increased, so that the ammonia gas can be decomposed more efficiently.
  • At least one of a supply passage for supplying ammonia gas into the combustion chamber and an exhaust passage for discharging exhaust gas after combustion generated in the combustion chamber to the outside is provided in the fixed side catalyst portion. It is preferable that the movable side catalyst portion is disposed so as to be insertable into the at least one passage by movement of the piston. In this case, since the movable catalyst part is inserted into the supply passage and / or the discharge passage of the fixed catalyst part when the piston moves, it is possible to prevent the two catalyst parts from interfering with each other.
  • the catalyst member is preferably made of nickel.
  • the catalyst member is made of nickel having excellent heat resistance, pressure resistance and vibration resistance, the life of the catalyst member can be extended.
  • the cylinder is preferably insulated.
  • the heat generated in the combustion chamber of the cylinder can be prevented from being released to the outside of the cylinder, so that the combustion efficiency of the ammonia engine can be further improved.
  • the ammonia engine further includes a supply device that supplies a mixed gas obtained by mixing ammonia gas and oxygen gas into the combustion chamber.
  • a supply device that supplies a mixed gas obtained by mixing ammonia gas and oxygen gas into the combustion chamber.
  • the combustion efficiency can be improved.
  • FIG. 1 is a side sectional view of an ammonia engine according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 showing a fixed side catalyst portion.
  • FIG. 2 is a cross-sectional view taken along the line BB in FIG. 1 showing a movable side catalyst part. It is side sectional drawing of the ammonia engine which shows the state which raised the piston. It is a sectional side view of the ammonia engine which concerns on 2nd Embodiment of this invention.
  • FIG. 6 is a plan view of a fixed side catalyst portion in the ammonia engine of FIG. 5.
  • FIG. 1 is a side sectional view of an ammonia engine according to a first embodiment of the present invention.
  • an ammonia engine 1 of this embodiment includes a cylinder 2 having a combustion chamber 21 therein, a supply device 3 for supplying a mixed gas in which ammonia gas (fuel) and air are mixed into the combustion chamber 21, An ignition device 4 for burning the mixed gas supplied into the combustion chamber 21, a discharge device 5 for discharging the exhaust gas after combustion to the outside from the combustion chamber 21, and a catalyst member 6 disposed in the combustion chamber 21.
  • the cylinder 2 includes a cylindrical cylinder liner 22 supported by the support member 9, a piston 23 provided in the cylinder liner 22 so as to be capable of reciprocating in the vertical direction (axial direction), and an upper end portion of the cylinder liner 22. And a cylinder head 24 disposed at (one axial end).
  • the cylinder head 24 is formed in a bowl shape, for example, and is fixed to the cylinder liner 22 with its opening directed downward.
  • a space surrounded by the inner circumferential surface of the cylinder liner 22, the upper surface of the piston 23, and the inner surface 24 c of the cylinder head 24 is a combustion chamber 21, and the mixed gas supplied into the combustion chamber 21 is The piston 23 is compressed by ascending.
  • the cylinder head 24 is provided with a supply hole 24a for supplying the mixed gas into the combustion chamber 21 and a discharge hole 24b for discharging the exhaust gas to the outside.
  • the support member 9 has a wall surface 9a having a circular cross section on which the outer peripheral surface of the cylinder liner 22 is fitted.
  • a plurality of annular concave grooves 9a1 are formed on the wall surface 9a at predetermined intervals in the axial direction.
  • the annular space surrounded by each concave groove 9a1 and the outer peripheral surface of the cylinder liner 22 is configured as a heat insulating space S1 for suppressing heat generated in the combustion chamber 21 from being released to the outside of the cylinder liner 22.
  • the ignition device 4 is made of, for example, an ignition plug, and is fixed through the thickness of the cylinder head 24 in the center thereof.
  • An ignition unit 4 a that ignites hydrogen gas decomposed from ammonia gas in the mixed gas supplied into the combustion chamber 21 is provided at the lower end of the ignition device 4.
  • the supply device 3 includes a supply valve 3a that opens and closes the supply hole 24a, and the mixed gas is supplied from the supply hole 24a into the combustion chamber 21 by opening the supply valve 3a by a driving unit (not shown). It has become.
  • the discharge device 5 includes a discharge valve 5a that opens and closes the discharge hole 24b, and the exhaust valve 5a is driven to open by driving means (not shown), whereby exhaust gas after combustion in the combustion chamber 21 is discharged from the discharge hole 24b. It has come to be.
  • the ammonia gas contained in the mixed gas comes into contact with the catalyst member 6 in the combustion chamber 21, the ammonia gas (NH 3 ) is converted into nitrogen gas (N 2 ) and hydrogen as shown in the following formula (1). It decomposes into gas (H 2 ). 2NH 3 ⁇ N 2 + 3H 2 (1) The decomposed hydrogen gas is combined with oxygen in the atmosphere in the combustion chamber 21 (oxygen contained in the air in the mixed gas) and burned by a spark generated in the ignition unit 4a of the ignition device 4. Yes.
  • the catalyst member 6 has a heat storage function for storing heat generated in the combustion chamber 21, and the temperature of the mixed gas supplied into the combustion chamber 21 is increased by the stored heat. Yes. Further, the catalyst member 6 is disposed in the combustion chamber 21, and the volume of the combustion chamber 21 is reduced by the volume of the catalyst member 6 to increase the compression ratio of the ammonia engine 1. Thus, since the inside of the combustion chamber 21 is brought into a high temperature and high pressure state by the catalyst member 6, the ammonia gas can be efficiently decomposed.
  • metal members such as cobalt, nickel, chromium, cerium, iron, copper, platinum, titanium, manganese, molybdenum, tungsten, palladium, ruthenium, vanadium, zirconium, bismuth, silicon, for example And alloys thereof (including sintered alloys) or plating. Since the catalyst member 6 of this embodiment is used in a high temperature and high pressure state, it is excellent in heat resistance, pressure resistance and vibration resistance, and nickel plating is used in consideration of cost.
  • the catalyst member 6 is configured by a fixed side catalyst portion 7 attached to the inner surface 24 c of the cylinder head 24 and a movable side catalyst portion 8 attached to the upper surface of the piston 23.
  • the fixed-side catalyst unit 7 is formed in, for example, a flat hemispherical shape, and is entirely housed in the cylinder head 24.
  • the spherical outer peripheral surface 7a of the fixed-side catalyst unit 7 is fixed to the inner surface 24c of the cylinder head 24 via annular first to fourth annular plates 10 to 13.
  • the first annular plate 10 is disposed so as to cover the outside of the opening of a recess 7e (described later) of the fixed-side catalyst unit 7.
  • the second and third annular plates 11 and 12 are arranged so as to cover the outside of the openings of the supply passage 7c (described later) and the discharge passage 7d (described later), respectively.
  • the fourth annular plate 13 is disposed so as to cover the lower end of the outer peripheral surface 7a of the fixed-side catalyst unit 7 over the entire circumference.
  • a supply passage 7 c having a circular cross section for supplying the mixed gas into the combustion chamber 21 at a position facing the supply hole 24 a of the cylinder head 24 is provided in the fixed side catalyst portion 7.
  • the supply passage 7c is formed such that the hole diameter of the supply passage 7c gradually increases from the outer peripheral surface 7a to the inner surface 7h of the fixed side catalyst portion 7, and the supply valve 3a reciprocates in the supply passage 7c. It is supposed to be.
  • the fixed-side catalyst unit 7 has a discharge passage 7d having a circular cross section for discharging the exhaust gas after combustion generated in the combustion chamber 21 to the outside at a position facing the discharge hole 24b of the cylinder head 24. It is formed to penetrate in the direction.
  • the discharge passage 7d is formed such that the hole diameter of the discharge passage 7d gradually increases from the outer peripheral surface 7a to the inner surface 7h of the fixed side catalyst portion 7, and the discharge valve 5a reciprocates in the discharge passage 7d. It is supposed to be.
  • a substantially conical recess 7e is formed around the ignition part 4a at the center of the outer peripheral surface 7a of the fixed-side catalyst part 7.
  • a space surrounded by the recess 7e and the inner surface 24c of the cylinder head 24 is a pre-combustion chamber 7f for burning hydrogen gas decomposed from ammonia gas in the vicinity of the ignition part 4a.
  • a plurality of small holes 7g communicating with the supply passage 7c, the discharge passage 7d, and the combustion chamber 21 below the precombustion chamber 7f are formed in the recess 7e of the fixed side catalyst portion 7 so as to extend radially (also in FIG. 2). reference).
  • FIG. 3 is a cross-sectional view taken along the line BB of FIG.
  • FIG. 4 is a side sectional view of the ammonia engine 1 showing a state where the piston 23 is raised.
  • the movable side catalyst portion 8 includes a disk-shaped substrate portion 8a disposed above the piston 23, and first and second projecting portions 8b and 2b protruding from the upper surface of the substrate portion 8a. It is comprised by the protrusion part 8c.
  • the substrate portion 8a is fixed to the upper surface of the piston 23 (end surface on the combustion chamber 21 side) via an annular fifth annular plate 15, and the upper surface of the piston 23, the lower surface of the substrate portion 8a, and the fifth annular plate.
  • the gap surrounded by the plate 15 is configured as a heat insulating space S ⁇ b> 3 for suppressing heat generated in the combustion chamber 21 from being released to the piston 23 side via the movable catalyst portion 8.
  • the cylinder 2 is insulated by the heat insulation space S3 and the heat insulation spaces S1 and S2 described above.
  • the first protrusion 8b is formed, for example, in the shape of a truncated cone, and is inserted into the supply passage 7c in the fixed-side catalyst portion 7 as the piston 23 rises as shown in FIG. .
  • the upper surface of the first protrusion 8b is formed to be inclined with respect to the horizontal plane so as not to interfere with the supply valve 3a when inserted into the supply passage 7c.
  • the second projecting portion 8c is formed, for example, in the shape of a truncated cone, and is inserted into the discharge passage 7d in the fixed-side catalyst portion 7 as the piston 23 rises as shown in FIG. .
  • the upper surface of the second protrusion 8c is formed to be inclined with respect to the horizontal plane so that it does not interfere with the discharge valve 5a when inserted into the discharge passage 7d.
  • the ammonia gas in the mixed gas supplied into the combustion chamber 21 of the cylinder 2 is decomposed into nitrogen gas and hydrogen gas by contacting the catalyst member 6. Therefore, the hydrogen gas after decomposition becomes easy to burn by being combined with oxygen in the atmosphere in the combustion chamber 21. Moreover, since the volume of the combustion chamber 21 is reduced by the volume of the catalyst member 6 disposed in the combustion chamber 21 and the compression ratio of the ammonia engine 1 is increased, the temperature in the combustion chamber 21 is raised by the compression heat. In addition, the ammonia gas in contact with the catalyst member 6 can be increased by increasing the density of the ammonia gas. As a result, the ammonia gas supplied into the combustion chamber 21 can be efficiently decomposed into hydrogen gas that is easily combusted, so that the combustion efficiency and output of the ammonia engine 1 can be improved.
  • the catalyst member 6 has a heat storage function for storing heat generated in the combustion chamber 21, the ammonia gas can be decomposed more efficiently by the heat stored in the catalyst member 6. Thereby, the combustion efficiency of the ammonia engine 1 can be further improved.
  • the catalyst member 6 since the catalyst member 6 has the fixed-side catalyst portion 7 attached to the cylinder head 24 that is the fixed side of the cylinder 2, the piston is compared with the case where it is attached to the piston 23 that is the movable side of the cylinder 2. It is possible to suppress the application of an external force such as an inertial force due to the reciprocating movement of 23. Therefore, it is possible to prevent the catalyst member 6 from being damaged during the driving of the ammonia engine 1.
  • a pre-combustion chamber 7f for burning hydrogen gas decomposed from ammonia gas is formed in the vicinity of the ignition unit 4a of the fixed-side catalyst unit 7, the pre-combustion chamber 7f was decomposed from ammonia gas. Hydrogen gas can be efficiently burned by the ignition unit 4a.
  • the supply passage 7c and the discharge passage 7d are formed in the fixed side catalyst portion 7, the number of parts can be reduced as compared with the case where the supply passage 7c and the discharge passage 7d are provided separately from the fixed side catalyst portion 7. Can be reduced. Thereby, the structure of the ammonia engine 1 can be simplified.
  • the movable side catalyst unit 8 is attached to the end surface (upper surface) of the piston 23 on the combustion chamber 21 side, the volume of the combustion chamber 21 can be further reduced by the volume of the movable side catalyst unit 8. Thereby, since the compression ratio of the ammonia engine 1 can be further increased, the ammonia gas can be decomposed more efficiently. Further, when the piston 23 is raised, the movable side catalyst portion 8 is inserted into the supply passage 7c and the discharge passage 7d of the fixed side catalyst portion 7, so that it is possible to prevent the two catalyst portions 7 and 8 from interfering with each other. .
  • the catalyst member 6 is made of nickel plating excellent in heat resistance, pressure resistance and vibration resistance, the life of the catalyst member 6 can be extended.
  • the cylinder 2 is insulated by the heat insulating spaces S1 to S3, it is possible to suppress the heat generated in the combustion chamber 21 of the cylinder 2 from being released to the outside of the cylinder 2. Thereby, the combustion efficiency of the ammonia engine 1 can be further improved.
  • the ammonia engine 1 includes the supply device 3 that supplies a mixed gas in which ammonia gas and air are mixed into the combustion chamber 21, the hydrogen gas decomposed from the ammonia gas in the combustion chamber 21 is mixed. It can be combined with oxygen gas contained in the air in the gas and burned. Thereby, the combustion efficiency of the ammonia engine 1 can be further improved.
  • FIG. 5 is a side sectional view of the ammonia engine 1 according to the second embodiment of the present invention.
  • FIG. 6 is a plan view of the fixed-side catalyst unit 7 in the ammonia engine 1.
  • the ammonia engine 1 in the present embodiment includes a heating device 16 that heats the stationary catalyst unit 7.
  • the heating device 16 includes, for example, a pair of heating wires 16a formed in a spiral shape.
  • Each heating wire 16a is accommodated in a pair of recesses 7a1 formed in a substantially elliptical shape in plan view on the outer peripheral surface 7a of the fixed-side catalyst unit 7.
  • the shape of the recess 7a1 may be formed in other shapes such as a rectangular shape in plan view in addition to a substantially elliptical shape in plan view.
  • the heating device 16 starts operation immediately before the start of the ammonia engine 1 so as to heat the fixed side catalyst unit 7 immediately before the start of the ammonia engine 1 and during the warm-up operation immediately after the start.
  • the heating device 16 stops its operation when the ammonia engine 1 changes from the warm-up operation to the normal operation and the fixed-side catalyst unit 7 can store heat by the heat generated in the combustion chamber 21.
  • the description is abbreviate
  • the stationary catalyst unit 7 can be heated by the heating device 16 until the stationary catalyst unit 7 can store heat generated in the combustion chamber 21. .
  • the combustion efficiency of the ammonia engine 1 can further be improved.
  • the catalyst member 6 in the above embodiment has a heat storage function, but it is sufficient that it has at least a function as a catalyst for decomposing ammonia gas.
  • the fixed side catalyst portion 7 of the catalyst member 6 is attached to the cylinder head 24, but may be attached to the inner peripheral surface of the cylinder liner 22. In this case, the inner peripheral surface of the cylinder liner 22 can be protected by the catalyst member 6.
  • the catalyst member 6 is constituted by the fixed side catalyst part 7 and the movable side catalyst part 8, it may be constituted by only one catalyst part.
  • the catalyst member 6 is provided as a separate body from the cylinder 2, but may be formed integrally with the cylinder 2.
  • the supply passage 7c and the discharge passage 7d are formed in the fixed-side catalyst unit 7, only one of the passages may be formed.
  • the movable-side catalyst unit 8 only needs to have the first projecting portion 8b or the second projecting portion 8c inserted into one of the passages.
  • the fixed side catalyst portion 7 may be one in which neither the supply passage 7c nor the discharge passage 7d is formed.
  • the supply apparatus 3 is supplying the mixed gas which mixed ammonia gas and air, what is necessary is just to supply the mixed gas which mixed ammonia gas and oxygen gas at least. Moreover, you may make it the supply apparatus 3 supply ammonia gas and air (or oxygen gas) separately.
  • the cylinder 2 is insulated by the heat insulating spaces S1 to S3, but may be insulated by a heat insulating material.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Catalysts (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

La présente invention a pour but de proposer un moteur à ammoniac qui peut atteindre un rendement de combustion accru. Dans ce moteur à ammoniac, un élément de catalyseur (6) qui peut décomposer l'ammoniac gazeux introduit comme combustible en azote gazeux et hydrogène gazeux est disposé dans une chambre de combustion (21) dans un cylindre (2).
PCT/JP2013/061312 2012-05-15 2013-04-16 Moteur à ammoniac WO2013172141A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014515545A JP6078056B2 (ja) 2012-05-15 2013-04-16 アンモニアエンジン

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-111450 2012-05-15
JP2012111450 2012-05-15

Publications (1)

Publication Number Publication Date
WO2013172141A1 true WO2013172141A1 (fr) 2013-11-21

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Application Number Title Priority Date Filing Date
PCT/JP2013/061312 WO2013172141A1 (fr) 2012-05-15 2013-04-16 Moteur à ammoniac

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JP (1) JP6078056B2 (fr)
WO (1) WO2013172141A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
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US20140374660A1 (en) * 2013-06-25 2014-12-25 Massachusetts Institute Of Technology Engine Chemical Reactor With Catalyst
NO20171354A1 (no) * 2017-08-14 2019-02-15 Lars Harald Heggen Nullutslipps fremdriftssystem og generatoranlegg med ammoniakk som brennstoff
JP2021161921A (ja) * 2020-03-31 2021-10-11 国立研究開発法人 海上・港湾・航空技術研究所 アンモニア燃焼方法、アンモニア燃焼エンジン及びそれを搭載した船舶
AT523836B1 (de) * 2020-09-23 2021-12-15 Pankl Racing Systems Ag Verfahren zum Betreiben eines Hubkolbenmotors sowie Hubkolbenmotor
CN114320572A (zh) * 2022-01-13 2022-04-12 天津大学 多燃烧模式氨燃料发动机及其控制方法
CN114439599A (zh) * 2020-11-06 2022-05-06 曼能解决方案（曼能解决方案德国股份公司）分公司 以氨进行操作的压缩点火式内燃发动机以及改装套件
CN115306540A (zh) * 2022-07-27 2022-11-08 清华大学 氢氨内燃机射流燃烧系统及其燃烧控制方法
DE102022107928A1 (de) 2022-04-04 2023-10-05 Green AP GmbH Verbrennungskraftmaschine, insbesondere für ein Kraftfahrzeug

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JP2021161921A (ja) * 2020-03-31 2021-10-11 国立研究開発法人 海上・港湾・航空技術研究所 アンモニア燃焼方法、アンモニア燃焼エンジン及びそれを搭載した船舶
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CN114439599A (zh) * 2020-11-06 2022-05-06 曼能解决方案（曼能解决方案德国股份公司）分公司 以氨进行操作的压缩点火式内燃发动机以及改装套件
JP7183369B2 (ja) 2020-11-06 2022-12-05 エムエーエヌ・エナジー・ソリューションズ・フィリアル・アフ・エムエーエヌ・エナジー・ソリューションズ・エスイー・ティスクランド アンモニアで動作する圧縮着火内燃機関及び改造キット
CN114439599B (zh) * 2020-11-06 2023-08-15 曼能解决方案（曼能解决方案德国股份公司）分公司 以氨进行操作的压缩点火式内燃发动机以及改装套件
CN114320572B (zh) * 2022-01-13 2022-12-02 天津大学 多燃烧模式氨燃料发动机及其控制方法
CN114320572A (zh) * 2022-01-13 2022-04-12 天津大学 多燃烧模式氨燃料发动机及其控制方法
DE102022107928A1 (de) 2022-04-04 2023-10-05 Green AP GmbH Verbrennungskraftmaschine, insbesondere für ein Kraftfahrzeug
WO2023194188A1 (fr) 2022-04-04 2023-10-12 Green AP GmbH Machine à combustion interne, en particulier pour un véhicule automobile
DE102022107928B4 (de) 2022-04-04 2023-11-30 Green AP GmbH Verbrennungskraftmaschine, insbesondere für ein Kraftfahrzeug
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