JP2003042410A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce soot in combustion gas exhausted from a combustion device. SOLUTION: In the forward side of a moving direction of flame, partition plates 115 and 116 having a plurality of through holes 115a and 116a are provided. Thus, foreign materials such as 'soot' can be removed from the combustion gas by the partition plates 115 and 115. Further, in a combustion tube (a main combustion tube 111 and a sub-combustion tube 114), the partition plates 115 and 116 (particularly, through holes 115a and 116a) are directly exposed to the flame, so that the 'soot' removed by the partition plates 115 and 116 and adhering to (retained in) the surfaces of the partition plates 115 and 116 can be incinerated (completely burnt) by the flame. Accordingly, since the foreign materials such as the 'soot' in the combustion gas exhausted from the combustion device 100 can be reduced, the foreign materials such as the 'soot' can be prevented from entering an engine 200.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustor and is effective when used in an intake air heating system for heating intake air of an internal combustion engine by supplying combustion gas to the intake side of the internal combustion engine.

[0002]

2. Description of the Related Art For example, in a combustor disclosed in Japanese Patent Laid-Open No. 6-21054104, a combustion cylinder 11 constituting a combustion chamber is shown in FIG.
Air inlet 111 for introducing combustion air to the circumferential side surface of No. 1
Although c is provided, in the combustion chamber having such a structure,
As shown in FIG. 5 (b), since the combustion air blows out toward the central axis side of the combustion cylinder, there is almost no stagnation (dead water region) in the vicinity of the inner wall surface of the combustion cylinder (combustion chamber). It is easy to occur.

By the way, the liquid fuel held in the wick 112 is vaporized (evaporated) by the combustion heat in the combustion chamber (radiant heat of the flame), is supplied into the combustion chamber, and is mixed with the air introduced from the air inlet. Burns, but combustion cylinder (combustion chamber)
Near the inner wall surface of the, stagnation (dead water area) with almost no air flow easily occurs, and the amount of fuel in this stagnation area is large compared to the amount of air (oxygen) (fuel rich) The fuel becomes rich. Therefore, in a region where stagnation is occurring (fuel is rich), incomplete combustion occurs due to lack of oxygen, and soot (PM) is easily generated, so that soot is formed on the inner wall surface of the combustion cylinder (combustion chamber). It adheres (deposits).

Therefore, when the combustion gas of the combustor described in the above publication is supplied to the intake side of the engine, foreign matter such as "soot" floating in the combustion gas of the combustor is sucked into the engine.

When foreign matter such as soot is sucked into the engine, the foreign matter clogs the intake manifold or the exhaust manifold, or the foreign matter is trapped between the piston and the cylinder bore and damages the piston and the cylinder bore. Problems such as being lost will occur.

In view of the above points, it is an object of the present invention to reduce soot and the like in the combustion gas discharged from the combustor.

[0007]

In order to achieve the above-mentioned object, the present invention provides a cylindrical combustion cylinder (111, 114) for combusting fuel, and a combustion cylinder (1) in the invention described in claim 1.
(11, 114), which is disposed inside the wick (112) for evaporating fuel, and is provided on the forward side in the moving direction of the flame from the wick (112) of the combustion cylinders (111, 114) and is directly exposed to the flame. In addition, a plurality of through holes (11
5a, 116a) and the trap means (1
15, 116).

As a result, foreign substances such as "soot" can be removed from the combustion gas by the trap means (115, 116).

Further, since the trap means (115, 116) (particularly the through holes (115a, 116a)) in the combustion cylinders (111, 114) are directly exposed to the flame, the trap means (115, 116) are exposed. It is possible to incinerate (completely combust) the "soot" that has been removed by the above and adhered (retained) to the surface of the trap means (115, 116) with a flame.

Therefore, according to the present invention, foreign matter such as "soot" in the combustion gas discharged from the combustor can be reduced.

According to the second aspect of the invention, the combustion cylinder (11
1, 114) are divided by a trap means (115) into a main combustion cylinder (111) on the wick (112) side and a sub combustion cylinder (114) on the forward side in the flame moving direction.

Thus, the flame in the main combustion cylinder (111) is prevented from spreading excessively and the flame is prevented from misfiring in the main combustion cylinder (111), while being discharged from the combustor. It is possible to reduce foreign matter such as "soot" in the combustion gas.

The invention according to claim 3 is characterized in that the trap means (115, 116) is curved so as to be convex in the axial direction of the combustion cylinder (111, 114).

As a result, the trap means (115, 11)
6) without enlarging the trap means (115, 11
Since the surface area of 6) can be enlarged, the through hole (1) can be formed without enlarging the trap means (115, 116).
It is possible to increase the total sum of the opening areas of 15a and 115b). Therefore, the trap means (115, 116)
It is possible to reduce the pressure loss of the combustion gas when passing through.

According to the invention described in claim 4, the trap means (115, 116) has a plurality of through holes (115a, 1).
16a) is formed into a combustion cylinder (111, 114)
And a stopper (12) fixed to the combustion tube (111, 114)
It is characterized in that it is sandwiched by 2) and is fixed to the combustion cylinder (111, 114).

As a result, the trap means (1) is made of a material that is difficult to weld, such as foam metal or honeycomb ceramics.
15, 116), the combustion cylinder (111,
114) can be fitted with trap means (115, 116).

Note that, as in the fifth aspect of the invention, at least one of the plurality of through holes (115a, 116a) may have an elongated hole shape.

The invention according to claim 6 is characterized in that the trap means (115, 116) is made of the same material as that of the combustion cylinders (111, 114).

As a result, it is possible to prevent the material cost of the combustor and the number of assembling steps from increasing.

In the invention according to claim 7, the cylindrical combustion cylinders (111, 114) for combusting the fuel, and the combustion cylinder (11)
1, 114) for evaporating the fuel and the wick (112) of the combustion cylinders (111, 114) provided on the forward side of the wick (112) in the flame moving direction. ) Is a main combustion cylinder (111) on the wick (112) side and a sub combustion cylinder (1) on the forward side in the flame moving direction.
14) and a partition member (115) for partitioning into the partition member (115), and the partition member (115) has at least a communication hole (115b) for communicating the main combustion cylinder (111) side and the sub combustion cylinder (114) side. A plurality of cylinders (111, 114) are provided around the central axis (CL).

As a result, as compared with the case where the flame spreads to the side of the auxiliary combustion cylinder (114) only from the communication hole at the center,
The flame can be spread all over the sub combustion cylinder 114.

Therefore, as compared with the case where the flame spreads to the side of the sub-combustion tube (114) only from the communication hole in the center, the area that does not contribute to combustion can be made smaller, so that foreign matter such as "soot" is generated. The probability can be reduced, and foreign matter such as "soot" in the combustion gas can be reduced.

In the invention described in claim 8, the partition member (1
15) is characterized in that it is curved so as to be convex toward the auxiliary combustion cylinder (114).

As a result, the through hole (115b) formed around the central axis CL is opened toward the inner wall of the auxiliary combustion cylinder (114), so that the flame can be more reliably generated in the auxiliary combustion cylinder (114). The entire area can be spread, and the area that does not contribute to combustion can be further reduced.

According to a ninth aspect of the present invention, a combustion cylinder (111, 114) having a cylindrical inner wall surface for combusting fuel,
A wick (112) disposed in the combustion cylinder (111, 114) for evaporating fuel, and a combustion cylinder (111, 114)
Of the wick (112), which is provided on the forward side in the flame moving direction, and which partitions the inside of the combustion tube (111, 114).
A second partition member (115, 116), the first and second partition members (115, 116) are provided with communication holes (115a, 116a) for communicating adjacent spaces, and
The first partition member (115) of the communication holes (115a, 116a) when viewed from the axial direction of the combustion tube (111, 114).
The center of the first communication hole (115a) and the second partition member (116) of the communication holes (115a, 116a) provided in
The center of the second communication hole (116a) provided in the first and second communication holes (115a, 116a) is displaced from the center.
Are provided so as to be symmetrical with respect to the central axis (CL) of the combustion cylinders (111, 114).

Thus, the flame and combustion gas passages in the combustion cylinders (111, 114) have a labyrinth structure. Therefore, foreign matter such as "soot" can be retained in the combustion cylinder (111, 114) having a labyrinth structure, so that the foreign matter such as "soot" in the combustion gas discharged from the combustor can be retained. It can be reduced.

Further, since the both communication holes (115a, 116a) are formed symmetrically with respect to the central axis (CL) of the combustion cylinder, the flame ejected from the first partition member (115) and the second Both of the flames ejected from the partition member (116) can be spread all over the combustion cylinder (111, 1144).

Therefore, since the area that does not contribute to combustion can be reduced, it is possible to reduce the probability that foreign matter such as "soot" is generated. In addition, foreign matter such as "soot" in the combustion gas can be reduced.

Since the flame generated in the combustion cylinder tends to move along the substantially central axis (CL), the first partition member (115) has the second partition member in the invention as set forth in claim 10. When it is arranged on the wick (112) side of the member (116), the first communication hole (115a) is the second communication hole (1) when viewed from the axial direction of the combustion tube (111, 114).
16a) is preferably provided closer to the central axis (CL).

In the eleventh aspect of the invention, the first partition member (115) is arranged closer to the wick (112) than the second partition member (116), and the second partition member (116) is , And is curved so as to be convex toward the first partition member (115) side.

As a result, foreign matter such as "soot" adhering to the second partition member (116) accumulates at the joint between the inner wall of the combustion cylinder and the second partition member (116) due to the dynamic pressure of the combustion gas. Therefore, it is possible to prevent foreign matter such as "soot" attached to the second partition member (116) from flowing to the downstream side of the combustion gas flow. Therefore, foreign matter such as "soot" in the combustion gas discharged from the combustor can be reduced.

In the invention as set forth in claim 12, the first partition member (115) is arranged closer to the wick (112) than the second partition member (116), and the second communication hole (116a) is provided. A wall portion (116b) extending toward the first partition member (115) is provided at the outer edge portion.

As a result, foreign matter such as "soot" adhering to the second partition member (116) can be prevented from flowing to the downstream side of the combustion gas flow, so that "soot" in the combustion gas discharged from the combustor is suppressed. It is possible to reduce foreign matter such as "."

In the thirteenth aspect of the invention, the first partition member (115) is arranged closer to the wick (112) than the second partition member (116), and the first partition member (115) is
The second partition member (116) is curved so as to be convex, and the first communication hole (115a) is the second communication hole (116a) when viewed in the axial direction of the combustion cylinders (111, 114).
It is characterized in that it is provided on the outer peripheral side.

As a result, foreign matter such as "soot" can be retained in the combustion cylinder having a labyrinth structure, and the area that does not contribute to combustion is reduced to generate foreign matter such as "soot". Since the probability can be reduced, foreign matter such as "soot" in the combustion gas discharged from the combustor can be reduced.

Incidentally, the reference numerals in the parentheses of the above-mentioned means are examples showing the correspondence with the concrete means described in the embodiments described later.

[0037]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment)
The combustor according to the present invention is applied to an intake air heating system for a water-cooled diesel engine (liquid-cooled internal combustion engine) for a vehicle, and FIG. 1 is a schematic diagram of the intake air heating system according to the present embodiment.

In FIG. 1, reference numeral 200 is a common rail type water-cooled diesel engine (hereinafter abbreviated as engine), and 20
Reference numeral 1 denotes an intake pipe that guides air (hereinafter referred to as intake air) from which dust has been removed by the air cleaner 202 to the engine 200. Reference numeral 203 denotes intake air guided by the intake pipe 201 to each cylinder of the engine 200 (this embodiment). In the form, the intake manifold is distributed and supplied to four cylinders.

Reference numeral 204 denotes an exhaust pipe through which the exhaust gas of the engine 200 flows. Downstream of the exhaust pipe 204, the exhaust gas is purified by promoting oxidation-reduction reactions such as hydrocarbons and nitrogen oxidation in the exhaust gas. A three-way catalyst (not shown) and a muffler (not shown) that reduces noise (exhaust noise) of the exhaust gas flowing out from the three-way catalyst are provided.

Reference numeral 100 denotes a combustor which generates heat by burning a fuel (in the present embodiment, the same light oil as the fuel of the engine 200). The combustor 100 has an air pump 300 for blowing combustion air. It is integrated. The details of the combustor 100 will be described later.

The air pump 300 is composed of a vortex (Wesco) type impeller 310, an electric motor 320 for rotationally driving the impeller 310, and the like. The electric pump 300 supplies fuel to the motor 320 and the combustor 100. 400 is controlled by an electronic control unit (not shown).

Reference numeral 330 denotes a combustor intake pipe that guides air to the combustor 100 (air pump 300), and a connecting portion between the combustor intake pipe 330 and the combustor 100 (hereinafter referred to as the combustor intake port 101). .) From the intake pipe 201 of the engine 200, and a case of directly introducing air from the atmosphere without passing through the intake pipe 201. An intake switching valve 102 for switching is provided.

On the other hand, at the exhaust port 103 of the combustor 100,
The first combustor exhaust pipe (hereinafter abbreviated as the first exhaust pipe) 104 that guides the combustion gas of the combustor 100 to the exhaust pipe 204 (on the exhaust flow upstream side of the three-way catalyst), and the combustion gas of the combustor 100 A second combustor exhaust pipe (hereinafter referred to as a second combustor) that leads to the intake pipe 201.
Abbreviated as exhaust pipe. ) 105 is connected to both exhaust pipes 1
The combustion gas is introduced into the first exhaust pipe 10 at the branch portion of 04 and 105.
An exhaust switching valve 106 that switches between a case where the gas is circulated to the fourth side and a case where the gas is circulated to the second exhaust pipe 105 side is provided.

Next, the combustor 100 will be described.

FIG. 2A shows a combustor 10 according to this embodiment.
2 is a cross-sectional view of the combustion unit 110, FIG. 2B is a cross-sectional view taken along the line AA of FIG. 2A, and FIG.
It is a BB sectional view of (a).

In FIG. 2A, 111 is a main combustion cylinder (main combustion chamber) for igniting and burning fuel, and the main combustion cylinder 111 is a cylindrical portion 111a and a cylindrical portion 111.
It is composed of a closing portion 11b for closing one end side (a left side in FIG. 2A) in the axial direction of a, and is integrally formed of metal.

The air pump 3 is provided in the cylindrical portion 111a.
A plurality of air holes 111c for introducing the air blown from the inside of the main combustion cylinder 111 are provided, while the closing portion 11
A wick 112 for evaporating the fuel is arranged at 1b. The wick 112 is a metal mesh having a large number of holes, and promotes vaporization of the fuel by temporarily holding the fuel in the large number of holes.

Further, 112a is a fuel pipe for supplying the fuel sent from the pump 400 to the wick 112,
Reference numeral 113 denotes a glow plug (ignition device) which is disposed near the wick 112 and generates heat when energized to ignite the fuel.

Reference numeral 114 denotes a cylindrical sub-combustion cylinder (sub-combustion chamber) connected to the forward end (right side in the drawing) of the flame in the axial direction of the main combustion cylinder 111 with respect to the wick 112. 111 and 114 communicate with each other through a first partition plate (partitioning member, trap means) 115 in which a large number of through holes (communication holes) 115a are formed. The main combustion cylinder 111 and the sub combustion cylinder 114 are collectively referred to as a combustion cylinder.

Here, the first partition plate 115 is the main combustion cylinder 1
The flame in 11 is prevented from spreading excessively and the main combustion cylinder 1
It is intended to prevent the flame from misfiring in 11, and the diameter of each through hole 115a and the sum thereof can allow the flame to spread to the auxiliary combustion cylinder 114 and can be generated in the main combustion cylinder 111. It should be large enough to remove foreign matter such as soot.

The side of the end of the auxiliary combustion cylinder 114 in the axial direction opposite to the main combustion cylinder 111 (the forward side in the moving direction of the flame) is
Similar to the first partition plate 115, a large number of through holes (communication holes) 1
Second partition plate (trap means) 116 on which 16a is formed
Is closed by the secondary combustion 114 and the secondary combustion cylinder 114.
The exhaust passage 117 formed around the outer wall of the through hole 11
It communicates via 6a. The second partition plate 116 is formed integrally with the auxiliary combustion cylinder 114.

Here, the hole diameters of the through holes 116a and the sum thereof can remove foreign matters such as "soot" generated by incomplete combustion without excessively increasing the flow resistance of the combustion gas (exhaust gas). It should be as large as possible.

Further, 118 is an air chamber 118 for the air sent from the air pump 300 around the outer periphery of the main combustion cylinder 111.
a, the exhaust passage 117 and the air chamber 118 are formed.
An intake / exhaust shut-off cylinder that separates a and 119 is an auxiliary combustion cylinder 1
The cooling water passage (water jacket) 120 and the exhaust passage 117, which cover 14 (and a part of the intake / exhaust cutoff cylinder 118) from the outside and in which a fluid (cooling water) that exchanges heat with the combustion gas flowing in the exhaust passage 117 flows. It is a heat exchange tube that separates and.

The inner wall of the heat exchange tube 119 is provided with fins 119a for increasing the heat transfer area with the combustion gas to promote heat exchange between the combustion gas and the cooling water.
The outer peripheral side of 9 is covered with a heater casing 121 that constitutes the cooling water passage 120.

Incidentally, the main combustion cylinder 111 and the auxiliary combustion cylinder 11
4 is made of a metal such as stainless steel having excellent heat resistance, and both 111 and 114 are joined by welding.

Next, the general operation of the combustor 100 will be described.

While the pump 400 and the air pump 300 are operated, the glow plug 113 is energized to heat and heat the wick 112, and the heated wick 1 is heated.
The fuel filled in 12 is heated and evaporated to ignite (start).

When it is considered that the combustion has shifted to the steady combustion state after a lapse of a predetermined time after ignition, the glow plug 1
The power supply to 13 is stopped, and the wick 112 is heated by the combustion heat generated by the combustion of the fuel to evaporate the fuel held in the wick 112 and continuously burn the fuel.

Next, the general operation of the intake air heating system according to this embodiment will be described.

When an engine key switch (not shown) is turned on in order to start the engine 200 and electric power can be supplied to vehicle electrical components such as an injector (fuel injection device) and instrument panel, it is interlocked with this. Then burner 100
While operating (igniting) the engine, a part of the combustion gas of the combustor 100 is partially discharged from the second exhaust pipe 10 until the cranking is started.
5 side (intake pipe 201 side) while supplying other combustion gas to the first communication pipe 104 side (exhaust pipe 204
The exhaust switching valve 106 is operated so as to discharge toward the side).

As a result, the intake gas is sufficiently heated while the intake pipe 201 is filled with the combustion gas of the combustor 100 and the combustion gas having lost its place of backflow is prevented from flowing back into the combustor 100. Therefore, the startability of engine 200 can be reliably improved.

At this time, a display lamp (not shown) that indicates that a part of the combustion gas of the combustor 100 is being supplied to the intake pipe 201 toward the occupant (driver) is turned on, and intake air is emitted. Inform the occupants that they are heating. Incidentally, in the present embodiment, the indicator lamp (display means) is provided on the instrument panel on which the speedometer is provided.

As is well known, cranking is as follows.
This is to start the engine by rotating a crankshaft (not shown) of the engine 200 by a rotary drive source such as a starter motor to suck and compress intake air.

Next, when a predetermined time elapses after the combustion gas is supplied to the intake pipe 201, the intake air is supplied to the engine 200.
Assuming that the temperature has reached a temperature sufficient to start the vehicle, the indicator lamp is turned off and the passenger is urged to crank.

When the cranking is actually started, the total amount of combustion gas in the combustor 100 is changed to the engine 20.
The exhaust switching valve 106 is operated so that the exhaust gas is supplied to the intake side of 0 (the intake pipe 201).

After the engine 200 is started (operated), the combustion gas of the combustor 100 is changed to the engine 200.
In order to reduce nitrogen oxides (Nox) in the exhaust gas of the engine 200 (exhaust gas recirculation) by supplying the exhaust gas to the intake side of Pipe 201), and when the heating capacity is complemented by the combustor 100 as a parking heater when the engine is stopped, the air cleaner 202
The combustion air is directly introduced from the atmosphere without passing through the exhaust gas, and the entire amount of the combustion gas is discharged to the exhaust pipe 204.

Here, the fact that the engine 200 is started (operated) means that the engine 200 is not cranked.
Indicates a state in which intake air is sucked and compressed by itself to operate, and specifically, when the rotation speed of engine 200 exceeds the rotation speed during cranking.

Next, the features of this embodiment will be described.

According to the present embodiment, since the partition plates 115 and 116 having the plurality of through holes 115a and 116a formed on the forward side in the moving direction of the flame are arranged, the soot and the like from the combustion gas are removed. Foreign matter can be removed by the partition plates 115 and 116.

In the combustion cylinders (main combustion cylinder 111 and auxiliary combustion cylinder 114), partition plates 115 and 116 (particularly,
Since the through holes 115a and 116a) are directly exposed to the flame, they are removed by the partition plates 115 and 116 and
It is possible to incinerate (completely combust) the "soot" adhered (retained) on the surface of 5, 116 with a flame.

Therefore, according to this embodiment, foreign matter such as "soot" in the combustion gas discharged from the combustor 100 can be reduced, so that foreign matter such as "soot" is sucked into the engine 200. This can be prevented.

In this embodiment, two sheets (first and second) are used.
Although the partition plates 114 and 116 are provided, the present invention is not limited to this, and only one of the partition plates (desirably, the first partition plate 114) may be provided.

(Second Embodiment) In the first embodiment, the first
The partition plate 112 is integrally formed with the intake / exhaust gas blocking cylinder 118, and the second partition plate 115 is integrally formed with the auxiliary combustion cylinder 114. However, in the present embodiment, as shown in FIG. By fixing (bonding) the porous body to the auxiliary combustion cylinder 114, the first and second partition plates (trap means) 115, 1
16 is configured.

Regarding the first partition plate 115, the flame is suppressed from excessively spreading into the auxiliary combustion cylinder 114 through the hole 114a formed in the auxiliary combustion cylinder 114.

(Third Embodiment) In the above-mentioned embodiment, the through holes 115a and 116a have the same shape (round hole).
In the present embodiment, as shown in FIG. 4, the through holes 116a of the second partition plate 116 have a mixture of elongated holes.

In the present embodiment, the through holes 116a of the second partition plate 116 are made to have elongated holes mixed therein. However, in the present embodiment,
The present invention is not limited to this, and through holes having other shapes may be mixed in the first partition plate 115 or the second partition plate 116.

(Fourth Embodiment) In the above embodiment, the first embodiment
In the embodiment, the first partition plate 115 is the intake / exhaust cutoff tube 118.
The second partition plate 116 is integrally formed with the auxiliary combustion cylinder 114, but in the present embodiment, as shown in FIG. 5, the auxiliary combustion cylinder 114 is provided with a member having a through hole 116a.
The second partition plate 116 is configured by sandwiching and fixing it to the sub-combustion cylinder 114 with the stopper 122 fixed by a fixing method such as welding or caulking. Incidentally, in the present embodiment, the through hole 115a of the first partition plate 115 is
The main combustion cylinder 111 has a hole diameter smaller than the inner diameter of the main combustion cylinder 111.

As a result, even if the partition plates 115 and 116 are made of a material such as foam metal or honeycomb ceramics that is difficult to weld, the partition plates 115 and 116 can be easily assembled to the combustion cylinder.

Although the second partition plate 116 is used as an example to describe the present embodiment in FIG. 5, the present embodiment is not limited to this, and can be applied to the first partition plate 115.

(Fifth Embodiment) In the present embodiment, as shown in FIG. 6, the second partition plate 116 is eliminated and the first partition plate is used.
The partition plate 115 is curved so as to be convex in the axial direction of the combustion cylinder (in this embodiment, the sub combustion cylinder 114 side), and
A long hole 115b extending in the radial direction is provided in a portion of the partition plate 115 that is inclined with respect to the axial direction.

Next, the features of this embodiment will be described.

In the present embodiment, since the first partition plate 115 is curved so as to be convex in the axial direction of the combustion cylinder, the diameter of the first partition member 115 (inner diameter dimension of the combustion cylinder) is not increased. The surface area of the first partition member 115 can be increased.

Therefore, the through hole 11 can be formed without increasing the diameter of the first partition member 115 (the inner diameter of the combustion cylinder).
The sum total of the opening areas of 5a and 115b can be enlarged, and the pressure loss of the combustion gas when passing through the first partition member 115 can be reduced.

As is clear from this description, when the purpose is to increase the total opening area of the through holes 115a and 115b, the direction of curvature is not limited to the side of the auxiliary combustion cylinder 114. Further, although the second partition plate 116 is omitted in the present embodiment, when the second partition plate 116 is present, the second partition plate 116 may be curved so as to be convex in the axial direction.

By the way, the first partition plate 115 has a simple flat plate shape, and the through hole 115a is formed in the central portion (central axis) thereof.
If it is provided only in the vicinity, the auxiliary combustion cylinder 11 is inserted from the through hole 115 a
As shown in FIG. 7A, the flame that spreads to No. 4 spreads from the through hole 115a in a substantially conical shape, so that a region that does not contribute to combustion occurs in the vicinity of the through hole 115a in the auxiliary combustion cylinder 114.

On the other hand, in order to prevent the generation of foreign matter such as "soot" during combustion, it is desirable to burn slowly in a relatively wide space. Therefore, as described above, the through hole 115a of the auxiliary combustion cylinder 114 is used. If a region that does not contribute to combustion occurs in the vicinity, the probability that foreign matter such as "soot" will occur increases.

This can be solved by increasing the axial dimension of the auxiliary combustion cylinder 114, but this means that the combustor 100 becomes large.

On the other hand, in this embodiment, as shown in FIG. 6, the through hole (communication hole) 115b of the first partition plate 115 is formed.
As shown in FIG. 7B, the through holes 115a in the central portion are provided because a plurality of them are provided around the central axis CL of the combustion cylinder.
Compared to the case where the flame spreads to the side of the auxiliary combustion cylinder 114 from only the flame, the flame spreads to the entire area inside the auxiliary combustion cylinder 114.

Therefore, as compared with the case where the flame spreads to the side of the auxiliary combustion cylinder 114 only from the through hole 115a in the central portion, the region which does not contribute to combustion can be made smaller.
The probability that foreign matter such as "soot" is generated can be reduced. In addition, since foreign matter such as "soot" in the combustion gas can be reduced, foreign matter such as "soot" can be reduced by the engine 20.
It is possible to prevent inhalation to 0.

Furthermore, in this embodiment, since the first partition plate 115 is curved so as to be convex toward the side of the auxiliary combustion cylinder 114, the through hole 115b formed around the central axis CL has the auxiliary combustion cylinder 114. It will open toward the inner wall of the. Therefore, since the flame spreads more reliably in the entire area of the sub combustion cylinder 114, the area that does not contribute to combustion can be further reduced.

(Sixth Embodiment) In the above-described embodiment, the first partition plate 115 or the second partition plate 116 acts as a filter to remove foreign matter such as "soot" from the combustion gas. In the embodiment, as shown in FIG. 8, the second partition plate 116 is displaced toward the main combustion cylinder 111 side as compared with the first embodiment, and the combustion cylinders (the main combustion cylinder 111 and the auxiliary combustion cylinder 11) are moved.
When viewed from the axial direction of 4), the center of the through hole 115a and the center of the through hole 116a are deviated from each other, and both the through holes 115a, 1
16a is formed so as to be symmetrical with respect to the central axis CL of the combustion cylinder.

Specifically, in the present embodiment, FIG.
8C, a through hole 115a is formed at the center of the first partition plate 115, and as shown in FIG.
A plurality (4 in the present embodiment) on the outer peripheral side of the partition plate 116.
It is formed.

Next, the features of this embodiment will be described.

In this embodiment, the center of the through hole 115a and the center of the through hole 116a are deviated from each other when viewed in the axial direction of the combustion cylinder, so that the passage of flame and combustion gas in the combustion cylinder has a labyrinth (labyrinth). ) It becomes a structure. Therefore,
Since the foreign matter such as "soot" can be retained in the combustion cylinder having the labyrinth structure, the foreign matter such as "soot" in the combustion gas discharged from the combustor 100 can be reduced.

Since both through holes 115a and 116a are formed symmetrically with respect to the central axis CL of the combustion cylinder, the flame ejected from the first partition plate 115 and the second
Both of the flames ejected from the partition plate 116 can be spread throughout the combustion cylinder.

Therefore, since the region that does not contribute to combustion can be reduced, the probability that foreign matter such as "soot" is generated can be reduced. Furthermore, foreign matter such as "soot" in the combustion gas can be reduced, so that foreign matter such as "soot" can be prevented from being sucked into the engine 200.

Further, the second partition plate 116 is the first partition plate 1
Since it is directly exposed to the flame ejected from 15, the "soot" adhering to the second partition plate 116 is incinerated by the flame ejected from the first partition plate 115. Therefore, foreign matter such as "soot" in the combustion gas can be reduced,
It is possible to prevent foreign matter such as “soot” from being sucked into engine 200.

In the invention according to the present embodiment, a plurality of through holes 115a are formed on the outer peripheral side of the first partition plate 115, and the through holes 116a are formed in the second partition plate 116, as shown in the embodiments described later. It may be formed at the center of the main combustion cylinder 1
Since the flame generated at 11 tends to move along the substantially central axis CL, the through hole 115a is formed at the center of the first partition plate 115 and the through hole 116a
It is desirable to form a plurality on the outer peripheral side of the partition plate 116.

(Seventh Embodiment) In this embodiment, as shown in FIG. 9, the first partition plate 115 is provided at the outer edge of the through hole 116a.
A cylindrical wall portion 116b extending to the side is provided.

As a result, foreign matter such as "soot" adhering to the second partition plate 116 is removed from the combustion gas flow downstream side (exhaust port 103).
Side), the combustor 10 can be prevented.
Foreign matter such as "soot" in the combustion gas discharged from 0 can be reduced.

(Eighth Embodiment) In this embodiment, as shown in FIG. 10, the second partition plate 116 is curved so as to be convex toward the first partition plate 115.

As a result, foreign matter such as "soot" adhering to the second partition plate 116 accumulates at the joint between the inner wall of the combustion cylinder (sub-combustion cylinder 114) and the second partition plate 116 due to the dynamic pressure of the combustion gas. As a result, foreign matter such as “soot” adhering to the second partition plate 116 will be on the downstream side of the combustion gas flow (exhaust port 103).
Side) can be suppressed.

(Ninth Embodiment) In this embodiment, as shown in FIG. 11, a plurality of through holes 115a are formed on the outer peripheral side of the first partition plate 115, and through holes 116a are formed in the second partition plate 116.
It is formed in the center of.

(Tenth Embodiment) This embodiment is shown in FIG.
As shown in FIG. 9, in the combustor 100 according to the ninth embodiment, as in the seventh embodiment, a cylindrical wall portion 116b extending toward the first partition plate 115 is provided at the outer edge portion of the through hole 116a. is there.

(Eleventh Embodiment) This embodiment is shown in FIG.
As shown in FIG. 7, in the combustor 100 according to the ninth embodiment, the second partition plate 116 is curved so as to be convex toward the first partition plate 115, as in the eighth embodiment.

(Twelfth Embodiment) This embodiment is shown in FIG.
As shown in FIG. 7, in the combustor 100 according to the ninth embodiment, the first partition plate 115 is curved so as to be convex toward the second partition plate 116 side.

As a result, foreign matter such as "soot" can be retained in the combustion cylinder having a labyrinth structure, and the area that does not contribute to combustion can be reduced as in the fifth embodiment. Since it is possible to reduce the probability that foreign matter such as soot is generated, it is possible to reduce foreign matter such as soot in the combustion gas discharged from the combustor 100, and the foreign matter such as soot is generated in the engine 200. It is possible to prevent it from being inhaled. .

(Other Embodiments) In the above embodiment, the combustor according to the present invention is used in the intake air heating system, but the supplementary invention is not limited to this and can be applied to other devices.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an intake air heating system according to an embodiment of the present invention.

2A is an axial sectional view of a combustor according to the first embodiment of the present invention, FIG. 2B is a sectional view taken along line AA of FIG. 2A, and FIG. It is a B sectional view.

FIG. 3 is an axial sectional view of a combustor according to a second embodiment of the present invention.

4A is an axial sectional view of a combustor according to a third embodiment of the present invention, FIG. 4B is an AA sectional view of FIG. 4A, and FIG. It is a B sectional view.

5A is an axial sectional view of a combustor according to a fourth embodiment of the present invention, and FIG. 5B is an AA sectional view of FIG.

FIG. 6A is an axial sectional view of a combustor according to a fifth embodiment of the present invention, and FIG. 6B is a sectional view taken along line AA of FIG.

FIG. 7 is an explanatory diagram for explaining the effect of the combustor according to the fifth embodiment of the present invention.

8A is an axial sectional view of a combustor according to a sixth embodiment of the present invention, FIG. 8B is an AA sectional view of FIG. 8A, and FIG. It is a B sectional view.

9A is an axial sectional view of a combustor according to a seventh embodiment of the present invention, FIG. 9B is an AA sectional view of FIG. 9A, and FIG. It is a B sectional view.

10A is an axial sectional view of a combustor according to an eighth embodiment of the present invention, FIG. 10B is an AA sectional view of FIG. 10A, and FIG. It is a B sectional view.

11A is an axial sectional view of a combustor according to a ninth embodiment of the present invention, FIG. 11B is a sectional view taken along the line AA of FIG. 11A, and FIG. FIG.

FIG. 12 is an axial sectional view of a combustor according to a tenth embodiment of the present invention.

FIG. 13 is an axial sectional view of a combustor according to an eleventh embodiment of the present invention.

14A is an axial cross-sectional view of a combustor according to a twelfth embodiment of the present invention, FIG. 14B is a cross-sectional view taken along the line AA of FIG. 14A, and FIG. FIG.

FIG. 15 is an explanatory diagram for explaining a problem of the conventional combustor.

[Explanation of symbols]

111 ... Main combustion cylinder, 114 ... Secondary combustion cylinder, 115 ... First partition plate (first partition member, trap means), 115a ... Through hole, 116 ... Second partition plate (second partition member, trap means), 116a … Through holes.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Teruhiko Kameoka             1-1, Showa-cho, Kariya city, Aichi stock market             Inside the company DENSO (72) Inventor Hirohito Matsui             14 Iwatani Shimohakaku-cho, Nishio-shi, Aichi Stock Association             Company Japan Auto Parts Research Institute (72) Inventor Masanori Yasuda             14 Iwatani Shimohakaku-cho, Nishio-shi, Aichi Stock Association             Company Japan Auto Parts Research Institute F-term (reference) 3K047 BA01 BA02 BA06 BA09

Claims (13)

[Claims] 1. A cylindrical combustion cylinder (11) for combusting fuel.
1, 114), a wick (112) disposed in the combustion cylinder (111, 114) for evaporating fuel, and the wick (1) of the combustion cylinder (111, 114).
12) is provided on the forward side in the moving direction of the flame, is directly exposed to the flame, and has a plurality of through holes (115a, 1a, 1a).
16a) having trap means (115, 1)
16) and a combustor. 2. The wick (112) of the combustion cylinder (111, 114) is provided by the trap means (115).
A combustor characterized by being divided into a main combustion cylinder (111) on the side and a sub combustion cylinder (114) on the forward side in the moving direction of the flame. 3. The trap means (115, 116)
Is curved so as to be convex in the axial direction of the combustion cylinder (111, 114), The combustor according to claim 1 or 2, wherein. 4. The trap means (115, 116)
Is a member in which the plurality of through holes (115a, 116a) are formed is sandwiched by the combustion cylinder (111, 114) and a stopper (122) fixed to the combustion cylinder (111, 114). The combustor according to claim 1, wherein the combustor is fixed to the combustion tube (111, 114). 5. The plurality of through holes (115a, 116)
5. A combustor according to claim 1, wherein at least one of a) has an elongated hole shape. 6. The trap means (115, 116)
Is made of the same material as the combustion cylinders (111, 114). 7. A cylindrical combustion cylinder (11) for combusting fuel.
1, 114), a wick (112) disposed in the combustion cylinder (111, 114) for evaporating fuel, and the wick (1) of the combustion cylinder (111, 114).
12) is provided on the forward side in the flame moving direction, and the combustion tubes (111, 114) are connected to the main combustion tube (111) on the wick (112) side and the auxiliary combustion tube (114) on the forward side in the flame moving direction. And a partition member (115) for partitioning the main combustion cylinder (111) into the partition member (115).
Side and the communication hole (115b) for communicating the side with the side of the auxiliary combustion cylinder (114), at least the combustion cylinder (111, 11).
A plurality of combustors are provided around the central axis (CL) of 4). 8. The combustor according to claim 7, wherein the partition member (115) is curved so as to be convex toward the auxiliary combustion cylinder (114) side. 9. A combustion cylinder (111, 114) having a cylindrical inner wall surface for burning fuel, a wick (112) disposed in the combustion cylinder (111, 114) for evaporating fuel, and the combustion cylinder. Of the (111, 114), the wick (1
12), first and second partition members (1) provided on the forward side in the moving direction of the flame and partitioning the inside of the combustion tubes (111, 114).
15, 116), the first and second partition members (115, 116) are provided with communication holes (115a, 116a) for communicating adjacent spaces, and further, the combustion cylinders (111, 114). Of the communication holes (115a, 116a) when viewed from the axial direction of
The first communication hole (115) provided in the partition member (115)
The center of a) and the center of the second communication hole (116a) provided in the second partition member (116) of the communication holes (115a, 116a) are deviated from each other, and the first and second communication holes are The combustor (115a, 116a) is provided so as to be symmetrical with respect to the central axis (CL) of the combustion cylinder (111, 114). 10. The first partition member (115) is disposed closer to the wick (112) than the second partition member (116), and further from the axial direction of the combustion cylinder (111, 114). As can be seen, the first communication hole (115a) corresponds to the second communication hole (1
The combustor according to claim 9, which is provided closer to the central axis (CL) than 16a). 11. The first partition member (115) is disposed closer to the wick (112) than the second partition member (116), and the second partition member (116) is the first partition member (116). The combustor according to claim 9 or 10, wherein the combustor is curved so as to be convex toward the first partition member (115). 12. The first partition member (115) is arranged closer to the wick (112) than the second partition member (116), and further at the outer edge of the second communication hole (116a). Is a wall portion (116b) extending toward the first partition member (115).
The combustor according to claim 9, wherein the combustor is provided. 13. The first partition member (115) is disposed closer to the wick (112) than the second partition member (116), and the first partition member (115) is the second partition member (115). 1
16), and is curved so as to be convex. Further, when viewed from the axial direction of the combustion tube (111, 114), the first communication hole (115a) is the second communication hole (1).
The combustor according to claim 9, 11 or 12, wherein the combustor is provided on the outer peripheral side of 16a).