JP6374174B2 - Internal combustion engine - Google Patents

Description

  The present invention relates to an internal combustion engine such as a diesel engine or a gasoline engine that can use wood and bamboo powder as a fuel.

  Conventionally, alcohol produced by fermenting and filtering corn and sugarcane is used as biomass alcohol fuel in gasoline engines. When used in a diesel engine, for example, a product obtained by methanol treatment or hydrocracking of animal and vegetable fats and oils is used as biodiesel fuel. Biomass alcohol fuel has the advantage that it does not emit new carbon dioxide because it emits very little sulfur oxides and nitrogen oxides and uses plants as raw materials.

  Some use charcoal as fuel for charcoal vehicles. The charcoal is charged into the charcoal gas generator, and the carbon monoxide generated by the charcoal gas generator is sent to the combustion chamber.

JP 2008-298030 A

  However, in order to produce biomass alcohol fuel and biodiesel fuel, facilities for fermenting and filtering corn and sugarcane or treating animal and plant oils and fats with methanol are required. When wood is used as fuel for charcoal automobiles, facilities for producing charcoal are required.

  In recent years, an increasing number of forests where a large amount of bamboo and trees have been neglected have led to devastation of the forests. If this abandoned bamboo or tree can be used as fuel for an internal combustion engine without being processed into charcoal, etc., and power can be generated by driving a generator, for example, it will be effective It can be used and forest devastation can be suppressed.

  The present invention has been made in order to solve the conventional problems as described above, and an object of the present invention is to supply trees, bamboo, and the like as fuel to the combustion chamber together with petroleum fuels such as heavy oil, light oil, and gasoline. An internal combustion engine that can.

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, according to one internal combustion engine of the present invention, a combustion chamber, an injection device that injects petroleum fuel into the combustion chamber, and an intake pipe that is connected to the combustion chamber and feeds intake air into the combustion chamber And an exhaust pipe that is connected to the combustion chamber and exhausts exhaust gas from the combustion chamber, and the intake pipe is connected to a bamboo powder supply device that supplies bamboo powder to the combustion chamber together with intake air The bamboo powder supply device has a storage unit for storing bamboo powder, one end connected to the storage unit and the other end connected to the intake pipe, and the bamboo powder stored in the storage unit is desired. The exhaust pipe is disposed adjacent to the storage section , and the outer periphery of the exhaust pipe is configured to transmit exhaust gas passing through the exhaust pipe. characterized in that the heat is in contact with the reservoir so as to heat conduction bamboo powder To.

According to the above configuration, heavy oil, light oil, or gasoline is supplied to the internal combustion engine, and, for example, with the idling maintained, an amount of bamboo powder corresponding to a desired output is continuously sucked from the storage unit through the transport unit. Can be transported inside the tube. The bamboo powder conveyed into the intake pipe is supplied to the combustion chamber together with the intake air and burned by the flame of heavy oil, light oil or gasoline, and then discharged from the exhaust pipe together with the exhaust of heavy oil, light oil or gasoline. Moreover, when the bamboo powder stored in the storage part contains moisture, the bamboo powder can be dried by the heat of the exhaust discharged around the exhaust pipe.

The particle size of the bamboo powder is preferably 300 μm or less. In addition, a sieve is provided at the inlet of the storage unit into which the bamboo powder is introduced.

According to the said structure, the lump of bamboo powder can be divided | segmented finely and it can store in a storage part.

The storage unit is supported by an internal combustion engine such as an engine .

According to the above configuration, since the storage unit receives vibration of the internal combustion engine, even when the bamboo powder stored in the storage unit is hardened, it can be separated into powder by the vibration of the internal combustion engine.

  Moreover, the said conveyance part is provided with the screw feeder.

According to the said structure, the bamboo powder stored in the storage part can be easily and continuously conveyed to a fixed amount of intake pipes.

  Further, the combustion chamber is provided with a flame generating device that generates a flame with petroleum fuel.

According to the above configuration, a flame is generated in a flame generating device by petroleum fuel such as gasoline, light oil, heavy oil, etc., and the bamboo powder supplied to the combustion chamber can be burned well by the flame generated by the flame generating device. it can.

It is the schematic which shows the component of the diesel engine of this invention. It is a perspective view of a bamboo powder supply apparatus. It is the schematic of the combustion chamber of a direct injection type diesel engine. It is the schematic of the combustion chamber of a vortex type diesel engine. It is the schematic which shows the combustion chamber of the gasoline engine which injects directly into a combustion chamber.

  Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic view showing components of a diesel engine according to the present invention. FIG. 2 is a perspective view of the bamboo powder supply device 7. FIG. 3 is a schematic view of a combustion chamber of a direct injection diesel engine. FIG. 4 is a schematic view of a combustion chamber of a vortex chamber type diesel engine. FIG. 5 is a schematic view showing a gasoline engine that directly injects gasoline into the combustion chamber.

  However, the embodiment described below exemplifies an internal combustion engine for embodying the technical idea of the present invention, and the internal combustion engine is not limited to the following. Further, the present specification by no means specifies the members shown in the claims to the members of the embodiments. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in the embodiments are not intended to limit the scope of the present invention unless otherwise specified, and are merely explanations. It is just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.

  As shown in FIG. 1, a diesel engine 1 includes an engine body 3 having a combustion chamber 2, an injection nozzle 4 that injects light oil or heavy oil into the combustion chamber 2, and an intake pipe 5 that supplies intake air to the combustion chamber 2. And an exhaust pipe 6 for exhausting the exhaust gas combusted in the combustion chamber 2. The intake pipe 5 is provided with a bamboo powder supply device 7 for supplying the bamboo powder 8 into the intake pipe 5.

If the bamboo powder 8 has a particle size of 300 μm or less, it has been confirmed that when the bamboo powder 8 is supplied to the combustion chamber 2 together with the intake air, a dust explosion is caused by the flame of petroleum fuel. Bamboo powder obtained by processing bamboo harvested from a bamboo forest to a particle size of 300 μm or less is used. In addition, as an apparatus for processing bamboo into bamboo powder, an automatic bamboo powder making apparatus manufactured by Bamboo Chemical Laboratory Co., Ltd. is used.
(Bamboo powder feeder 7)

The bamboo powder supply device 7 is a hopper 9 that is a storage unit for storing the bamboo powder 8, and a conveyance unit that is attached to the bottom of the hopper 9 and conveys the bamboo powder 8 stored in the hopper 9 into the intake pipe 5. A screw feeder 10 is provided.
(Hopper 9)

  The hopper 9 is formed of, for example, a cylindrical container having an input port 11 through which the bamboo powder 8 is input. The bottom of the hopper 9 has a tapered diameter, and a discharge hole 12 is provided at the lower end of the bottom. Bamboo powder 8 is input from an input port 11 and stored inside the hopper 9, discharged from its lower discharge hole 12 by its own weight, and supplied to the screw feeder 10.

  Bamboo harvested from bamboo forest contains moisture, and when bamboo is processed into bamboo powder 8, the bamboo powder 8 may harden due to this moisture. In order to prevent the bamboo powder 8 from being sent to the combustion chamber 2 together with the intake air as it is solidified, it is difficult to completely burn the bamboo powder 8 and a mesh-like sieve 13 is installed at the inlet 11 of the hopper 9. Thus, the lump of bamboo powder 8 is put into the hopper 9 and stored in a state of being finely divided by the sieve 13. Since the hopper 9 is installed adjacent to the exhaust pipe 6, the bamboo powder 8 stored in the hopper 9 is heated by the heat of the exhaust gas and is easily received by the heat of the exhaust gas discharged from the exhaust pipe 6. The moisture contained in is removed and the product becomes dry. Note that the heat of the exhaust gas can be more effectively transmitted to the bamboo powder by providing heat radiation fins 22 on the outer periphery of the exhaust pipe 6.

Further, in the present embodiment, the bamboo powder supply device 7 is attached to the engine block of the engine body 3 by the mounting bracket 14 and is easily subjected to vibration of the engine body 3. The bamboo powder 8 stored in the hopper 9 is dried by the heat of the exhaust gas, and is subjected to vibration of the engine body 3, so that the small mass of the bamboo powder 8 that has passed through the mesh of the sieve 13 is further finely loosened into a powder form. .
(Screw feeder)

  The screw feeder 10 is connected to the lower part of the hopper 9. The screw feeder 10 includes a screw 17 in which a spiral blade 16 is provided around a rotating shaft 15. The screw 17 is accommodated in a cylindrical casing 18 and is driven by a motor 19 attached to one end of the rotating shaft 15. A charging port 20 connected to the discharge hole 12 of the hopper 9 is provided on one end portion side of the casing 18, and the other end portion of the casing 18 is connected to the intake pipe 5. The bamboo powder 8 supplied to the screw feeder 10 is conveyed from one end side to the other end side and supplied into the intake pipe 5.

  The rotation speed of the motor 19 can be adjusted by a speed controller (not shown), and the feed amount of the bamboo flour 8 can be arbitrarily adjusted by the speed controller. Since the vibration of the engine is transmitted to the screw feeder 10, the bamboo powder 8 is effectively prevented from being pushed and hardened by the screw 17 inside the screw feeder 10, and the bamboo powder 8 is put into the intake pipe 5 in a powder state. Can be transported.

A baffle plate 21 that restricts the flow direction of the bamboo powder 8 can also be installed at a connection portion between the screw feeder 10 and the intake pipe 5. The baffle plate 21 may be formed of a single plate, or may be formed of a plurality of plates. The baffle plate 21 is effective for restricting the flow direction of the bamboo powder 8 and distributing the bamboo powder 8 uniformly in the intake air.
(diesel engine)

  The diesel engine 1 may be one in which petroleum fuel such as light oil is directly injected into the combustion chamber 2 by an injection nozzle 4 as shown in FIG. 3, or a vortex chamber 25 that is a pre-combustion chamber as shown in FIG. In addition, an injection nozzle 4 provided in the vortex chamber 25 for injecting petroleum fuel such as light oil into the vortex chamber 25 may be provided, and a flame of petroleum fuel may be generated in the vortex chamber 25. The vortex chamber 25 and the injection nozzle 4 constitute a flame generating device. In the vortex chamber type combustion chamber, for example, the volume of 70% of all the compression chambers is made into the vortex chamber 25, which helps to mix petroleum fuel such as light oil and air and to burn the petroleum fuel well. .

  As a preparation for supplying bamboo powder 8 to the diesel engine 1, petroleum fuel is supplied to the diesel engine 1, and the engine is operated in an idling state where no load is applied. In this state, the bamboo powder 8 put into the hopper 9 is discharged from the screw feeder 10 and put into the intake pipe 5. The intake air flowing inside the intake pipe 5 receives negative pressure, and the bamboo powder 8 discharged from the screw feeder 10 flows into the main combustion chamber 2 together with the intake air. At this time, the bamboo powder 8 is uniformly distributed in the intake air.

  In the case of the combustion chamber 2 shown in FIG. 3, the injected petroleum fuel burns and a flame is generated in the combustion chamber 2. The bamboo powder 8 supplied to the combustion chamber 2 is burned by the flame of this petroleum fuel. The burned bamboo powder 8 is discharged from the exhaust pipe 6 together with the exhaust gas of petroleum fuel.

  In the case of the vortex chamber type combustion chamber, since the fuel oil is injected by the injection nozzle 4 into the intake air swirled in the vortex chamber 25, it becomes easy to completely burn the oil fuel and a good flame of the oil fuel is generated. To do. A good flame generated in advance in the vortex chamber 25 is ejected into the main combustion chamber 23 and ignites the bamboo powder 8, so that the bamboo powder 8 is easily burned completely.

The bamboo powder 8 is thus burned by the flame of petroleum fuel. Since the diesel engine 1 has a higher compression ratio than the gasoline engine, the space of the combustion chambers 2 and 23 is narrower than that of the gasoline engine when the piston 24 is located at the top dead center in the compression stroke. When the amount of bamboo powder 8 supplied to the combustion chambers 2 and 23 is large, when the piston 24 rises in the compression stroke, the diesel engine 1 may be damaged by coming into contact with the mass of the compressed bamboo powder 8. .
(gasoline engine)

  A gasoline engine 28 used in this embodiment is shown in FIG. A recess 27 is formed in the cylinder head 26 of the gasoline engine 28, and a spark plug 30 is provided at the center of the recess 27, and a gasoline injection nozzle 31 is provided on one side of the spark plug 30. The gasoline injection nozzle 31 is provided in an inclined state in the direction of the ignition plug 30, and a metal partition plate 34 is attached to the opening of the recess 27. The partition plate 34 covers a portion of the opening where the ignition plug 30 and the gasoline injection nozzle 31 are provided, and on the other side where the gasoline injection nozzle 31 is not installed when viewed from the ignition plug 30, A gap 35 is formed. The other end portion of the partition plate 34 is bent in a circular arc shape toward the inside of the recess 27. The sub-combustion chamber 36 is constituted by the recess 27 and the partition plate 34, and the flame generating device 37 is constituted by the sub-combustion chamber 36, the ignition plug 30 and the gasoline injection nozzle 31.

  In preparation for supplying bamboo powder 8 to the gasoline engine 28, gasoline is injected from the gasoline injection nozzle 31 and the gasoline engine 28 is operated in an idling state where no load is applied. Since the end of the partition plate 34 is formed in an arc shape so as to surround the spark plug 30, the gasoline hitting the partition plate 34 moves along the arc of the partition plate 34 and moves in the direction of the spark plug 30. You can change the direction. As a result, the gasoline injected by the gasoline injection nozzle 31 is reliably ignited by the ignition plug 30, and a good flame is generated in the auxiliary combustion chamber 36. The flame generated in the auxiliary combustion chamber 36 is ejected from the gap 35 to the main combustion chamber 32.

  In a state where the gasoline engine 28 is operated in the idling state, the bamboo powder 8 stored in the hopper 9 is discharged from the screw feeder 10 and introduced into the intake pipe 5. The intake air flowing inside the intake pipe 5 receives negative pressure, and the bamboo powder 8 thrown into the intake pipe 5 flows into the main combustion chamber 32 in a state of being uniformly distributed in the intake air. The bamboo powder 8 that has flowed into the main combustion chamber 32 can be stably burned by a gasoline flame that has been generated in the sub-combustion chamber 36 in advance and spread in the main combustion chamber 32. When using the gasoline engine 28, it is generally difficult to burn the bamboo powder 8 directly with the spark of the spark plug 30.

  Since the compression ratio of the gasoline engine 28 is lower than that of the diesel engine 1, the space of the main combustion chamber 32 when the piston 33 is located at the top dead center is wider than that of the diesel engine 1. When it rises, the possibility that the bamboo powder 8 supplied to the main combustion chamber 32 will be compressed and will contact the piston 33 will become low. Therefore, when increasing the supply amount of the bamboo powder 8 to increase the output, it is desirable to use the gasoline engine 28 having a larger piston-head clearance capacity than the diesel engine 1.

  The diesel engine 1 and the gasoline engine 28 used in the present embodiment can be of a stationary type in which a generator is connected and installed in a certain place, for example. Bamboo powder that is no longer needed is cut down to produce bamboo powder, and the bamboo powder is continuously supplied to the diesel engine 1 and the gasoline engine 28 for power generation. Bamboo powder is produced from bamboo and used, but wood powder can also be produced and used from trees left in mountain forests and waste materials.

  Although the case where it used for the diesel engine 1 or the gasoline engine 28 was demonstrated, it is not limited to this, It can use also for internal combustion engines, such as a rotary engine.

  The internal combustion engine of the present invention can be suitably used as a diesel engine or a gasoline engine that can drive a generator or the like using wood bamboo powder produced from trees or bamboo left in the forest as fuel.

DESCRIPTION OF SYMBOLS 1 ... Diesel engine 2 ... Combustion chamber 3 ... Engine main body 4 ... Injection nozzle 5 ... Intake pipe 6 ... Exhaust pipe 7 ... Bamboo powder supply device 8 ... Bamboo powder 9 ... Hopper 10 ... Screw feeder 11 ... Input port 12 ... Discharge hole 13 ... Sieving 14 ... Mounting bracket 15 ... Rotating shaft 16 ... Blade 17 ... Screw 18 ... Case 19 ... Motor 20 ... Inlet 21 ... Baffle 22 ... Fin 23 ... Main combustion chamber 24, 33 ... Piston 25 ... Vortex chamber 26 ... Cylinder Head 27 ... Recess 28 ... Gasoline engine 30 ... Spark plug 31 ... Gasoline injection nozzle 32 ... Main combustion chamber 34 ... Partition plate 35 ... Opening 36 ... Sub combustion chamber 37 ... Flame generating device

Claims (5)

A combustion chamber;
An injector for injecting petroleum fuel into the combustion chamber;
An intake pipe connected to the combustion chamber and sending intake air into the combustion chamber;
An exhaust pipe connected to the combustion chamber and exhausting the exhaust from the combustion chamber;
In an internal combustion engine with
A bamboo powder supply device that supplies bamboo powder to the combustion chamber together with intake air is connected to the intake pipe,
The bamboo powder supply device includes a storage unit for storing bamboo powder;
One end is connected to the storage unit, and the other end is connected to the intake pipe, and includes a transfer unit capable of continuously transferring a desired amount of bamboo powder stored in the storage unit to the intake pipe. And
The exhaust pipe is installed adjacent to the storage section ;
An internal combustion engine, wherein an outer periphery of the exhaust pipe is in contact with the storage portion so as to conduct heat of exhaust gas passing through the exhaust pipe to bamboo powder . The internal combustion engine according to claim 1,
An internal combustion engine characterized in that a flame generating device for generating a flame with petroleum fuel is provided in the combustion chamber. The internal combustion engine according to claim 1 or 2,
An internal combustion engine characterized in that the particle size of bamboo powder is 300 μm or less. The internal combustion engine according to any one of claims 1 to 3 ,
The internal combustion engine, wherein the storage unit is supported by the engine. The internal combustion engine according to any one of claims 1 to 4 ,
The transport unit includes a screw feeder,
An internal combustion engine characterized in that the number of rotations of a motor for driving the screw feeder is adjustable.

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