JP3146521U - Brown gas generator - Google Patents

Abstract

A brown gas generator that can be reduced in size and weight, for example, can reduce and suppress generation of harmful substances in an internal combustion engine.
A cylindrical case 21 in which a brown gas supply passage 50 and a water vapor supply passage 210 are formed to face each other, and the brown gas supply passage 50 and the water vapor supply passage 210 in the cylindrical case 21 are blocked from each other. The nozzle 24 is configured to circulate the pressurized water vapor supplied from the water vapor supply passage 210 and pressurized in the flow passage 24A toward the brown gas supply passage 50, and the water vapor flow in the flow passage 24A of the nozzle 24 It is provided at both ends in the direction facing the flow passage 24A, and a plasma arc is generated by applying a plasma voltage, and the water vapor is decomposed into hydrogen and oxygen to generate brown gas from the hydrogen and oxygen. Electrodes 25 and 26.
[Selection] Figure 2

Description

  The present invention relates to a brown gas generator, and more particularly to a generator that can be reduced in size and weight, for example, to reduce and suppress generation of harmful substances in an internal combustion engine.

  Petroleum-based fuels such as gasoline are used in vehicle engines. However, burning petroleum-based fuels generates harmful substances such as CO and NOx, causing environmental pollution. On the other hand, an alcohol engine in which ethanol is used instead of petroleum fuel has been put into practical use. In addition, fuel cell vehicles, which generate electricity by reacting hydrogen and oxygen and drive by driving a motor, are attracting attention and are being put to practical use.

  In addition, the generation of harmful substances such as CO and NOx is reduced by irradiating a plasma arc in water to decompose it into hydrogen and oxygen, and using the resulting hydrogen gas mixed with hydrogen and oxygen as fuel. An internal combustion engine that has been designed to be suppressed is proposed (Patent Document 1).

  Furthermore, when brown gas is used as a fuel for an internal combustion engine, the fuel supply of the internal combustion engine reduces the combustion temperature by mixing brown alcohol with lower alcohol, gasoline, etc. to reduce the durability of the internal combustion engine. An apparatus has been proposed (Patent Document 2).

Japanese Patent Laid-Open No. 10-220237 JP 2005-320416 A

  However, since the fuel supply device for the internal combustion engine described in Patent Documents 1 and 2 consumes a large amount of brown gas, there is a problem that the generator of the brown gas is increased in size and is difficult to be mounted on a vehicle that is required to be reduced in weight. .

  An object of the present invention is to provide a brown gas generator that can be reduced in size and weight, for example, can reduce and suppress generation of harmful substances in an internal combustion engine.

  Therefore, a brown gas generator according to the present invention includes a cylindrical case in which a brown gas supply passage and a water vapor supply passage are opposed to each other, and a gap between the brown gas supply passage and the water vapor supply passage in the cylindrical case. A nozzle which is attached to be shut off and which circulates the pressurized water vapor supplied from the water vapor supply passage in the flow passage toward the brown gas supply passage, and the both ends of the flow passage of the nozzle in the water vapor distribution direction. An electrode that is provided facing the flow path, generates a plasma arc by applying a plasma voltage, decomposes the water vapor into hydrogen and oxygen, and generates brown gas from the hydrogen and oxygen. It is characterized by that.

  One feature of the present invention is that a plasma arc is generated by applying a plasma voltage to the electrode desired in the nozzle flow path, and the water vapor is pressurized and circulated through the nozzle flow path to convert the water vapor into hydrogen and oxygen. It is in the point which made it decompose.

  As a result, brown gas can be generated efficiently, and a small and light brown gas generator can be configured.

  It is desirable for the water vapor to pass through the plasma arc over a long distance in the flow path of the nozzle. Therefore, the brown gas generator is preferably configured so that water vapor passes through the nozzle flow passage while being spirally swirled.

  That is, a frustoconical diameter-enlarged portion is formed in communication with the flow passage on the side of the water vapor supply passage of the nozzle, and the frustoconical part is fitted into the enlarged-diameter portion, and a plurality of frustoconical parts are formed on the outer surface of the truncated cone part And a narrow gap is formed between the enlarged diameter portion and the truncated cone part by the protruding portion so that the water vapor is circulated in a spiral shape. Good.

  In addition, brown gas is not used as a fuel for an internal combustion engine, but if it is used to improve the combustion efficiency of the fuel in the internal combustion engine, a small amount of brown gas may be generated. Since it is not necessary to use a generator, the brown gas generator according to the present invention is optimal.

  The steam may be generated by providing a heater, but considering the narrow layout space of the vehicle, it is preferable to generate the steam using the exhaust heat of the internal combustion engine. That is, the brown gas generator is configured to supply water vapor generated by heating water with the heat of exhaust gas from the internal combustion engine.

  Here, examples of the aromatic hydrocarbon compound include gasoline and light oil. Moreover, methanol and ethanol are mentioned as a hydrocarbon compound. These may be used alone or in combination.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 3 show a preferred embodiment of a brown gas generator according to the present invention, which is an example applied to a fuel supply device for an internal combustion engine. In the drawing, an intake passage 11 and an exhaust passage 12 are formed in the engine 10 so as to open to the combustion chamber 13. An intake valve 14 and an exhaust valve 15 are provided in the intake port 11 A of the intake passage 11 and the exhaust port 12 A of the exhaust passage 12. It can be opened and closed freely.

  Further, a fuel injection valve 16 and a spark plug 17 are attached to the engine 10 so as to face the combustion chamber 13, and gasoline is supplied to the fuel injection valve 16 by a fuel pump (not shown), while the fuel injection valve 16 and The spark plug 17 is driven and controlled by an engine control device (not shown).

  A brown gas supply passage 50 is connected to the intake passage 11 of the engine 10, and a brown gas generator 20 is connected to the brown gas supply passage 50. In the brown gas generator 20, ceramics 22 is lined on a metal cylindrical case 21, and heat resistance is imparted.

  A nozzle 24 is fitted into the cylindrical case 21, and a flow passage 24 </ b> A is formed in the nozzle 24, and the inner diameter of the flow passage 24 </ b> A is gradually increased from the straight portion having a small diameter toward the front end and the rear end. A truncated cone part 27 is fitted into the rear diameter-enlarged portion, and the truncated cone part 27 is held in a fitted state by the biasing force of the coil spring 28 received by the pedestal 29 of the case 21.

  A plurality of, for example, four protrusions 27 </ b> A having a spiral shape are formed on the outer surface of the truncated cone part 27, thereby narrowing the gap between the inner surface of the rear enlarged portion of the nozzle 24 and the outer surface of the truncated cone part 27. The water vapor is spirally supplied to the small-diameter linear portion of the flow passage 24A of the nozzle 24.

  Electrodes 25 and 26 are arranged before and after the small-diameter linear portion of the nozzle 24, and a plasma voltage is applied between the electrodes 25 and 26.

  In addition, a steam supply port 210 is formed in the case 21 of the brown gas generator 20, and steam from the heat exchanger 30 is sent to the supply port 210. The heat exchanger 30 is configured to evaporate water using the heat of the exhaust gas of the engine 10, and water is supplied to the heat exchanger 30 by a feed water pump 40.

  When the engine 10 is operated, the water supply pump 40 supplies water to the heat exchanger 30, and the exhaust gas of the engine 10 and water are heat-exchanged in the heat exchanger 30 to generate water vapor. Is supplied into the case 21 and is pressurized in the rear portion of the case 21.

  The pressurized water vapor passes through the gap at the rear of the nozzle 24 and is spirally guided by the spiral protrusion 27A of the truncated cone part 27 to reach the linear portion with a small diameter of the nozzle 24 to maintain the spiral shape. As it is, it passes through the linear part with a small diameter. At this time, a plasma arc is generated between the electrodes 25 and 26, and a plasma arc is generated. By passing through the plasma arc, hydrogen and oxygen are decomposed, and the decomposed hydrogen and oxygen are 2: 1. Brown gas is generated by mixing at a ratio of

  The generated brown gas is supplied from the brown gas supply passage 50 to the intake passage 11 of the engine 10, is sucked into the combustion chamber 13 of the engine 10 together with the intake air, is mixed with the injected fuel from the fuel injection valve 16, and is mixed by the spark plug 17. It is ignited and burned.

  Since brown gas burns at a high temperature of 1700 ° C. or higher, the combustion efficiency of the injected fuel is improved, and the amount of harmful substances such as CO and NOx can be reduced.

  In the above example, the engine 10 including the fuel injection valve 16 has been described as an example. However, the present invention can be similarly applied to an engine including a carburetor. In the above example, the gasoline engine has been described as an example, but the present invention can be similarly applied to a diesel engine.

It is a figure which shows typically the fuel supply apparatus of the engine provided with preferable embodiment of the brown gas generator which concerns on this invention. It is a figure which shows the structural example of the said embodiment. It is a figure which shows the truncated cone part 27 of the nozzle in the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Engine 11 Intake passage 12 Exhaust passage 13 Combustion chamber 16 Fuel injection valve 17 Spark plug 20 Brown gas generator 21 Case 22 Lined ceramic 24 Plug 24A Flow passage 25, 26 Electrode 27 Frustum part 27A Projection part 30 Heat exchanger 40 Water supply Pump 50 Brown gas supply passage 210 Water vapor supply passage

Claims (4)

A cylindrical case (21) formed by facing the brown gas supply passage (50) and the water vapor supply passage (210);
The brown gas supply passage (50) and the water vapor supply passage (210) in the cylindrical case (21) are attached to be shut off, and the pressurized water vapor supplied from the water vapor supply passage (210) is pressurized. A nozzle (24) that circulates in the flow passage (24A) toward the brown gas supply passage (50),
Provided at both ends of the flow path (24A) of the flow path (24A) of the nozzle (24) facing the flow path (24A), a plasma arc is generated by applying a voltage, and the water vapor is mixed with hydrogen and oxygen. An electrode (25, 26) that decomposes into hydrogen and generates brown gas from the hydrogen and oxygen;
Brown gas generator characterized by comprising.   The nozzle (24) has a frustoconical enlarged diameter portion formed on the side of the water vapor supply passage (210) in communication with the flow passage (24A), and the frustoconical part (27) is fitted into the enlarged diameter portion. A plurality of spiral ridges (27A) are formed on the outer surface of the truncated cone part (27), and the ridges (27A) provide a connection between the enlarged diameter portion and the truncated cone part (27). The brown gas generator according to claim 1, wherein a narrow gap is formed therebetween to allow water vapor to flow in a spiral shape.   The brown gas supply passage (50) supplies the generated brown gas to an intake system of an internal combustion engine using an aromatic hydrocarbon compound or a hydrocarbon compound as a fuel to burn the aromatic hydrocarbon compound or the hydrocarbon compound. The brown gas generator according to claim 1, wherein the brown gas generator is improved.   The brown gas generator according to claim 1, wherein water vapor is generated by heating water by heat of exhaust gas from an internal combustion engine.

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