JP3161615U - Exhaust gas purification device for internal combustion engine - Google Patents

Abstract

An object of the present invention is to increase the activity of exhaust gas to facilitate the combustion of harmful substances, to reliably purify harmful substances, to lower the temperature of the purified exhaust gas, to mute the exhaust gas, and to smoothly supply it to the internal combustion engine. Provided is an exhaust gas purification device for an internal combustion engine that is simple, compact, easy to maintain, and economical. A far-infrared generator B connected to an exhaust manifold of an internal combustion engine A, a catalytic converter C connected to the far-infrared generator B, an exhaust gas cooler D connected to the catalytic converter C, and an exhaust gas cooler A silencer E connected to D and an air box F connected to the silencer E. Exhaust gas sequentially passes through a far-infrared generator B, a catalytic converter C, an exhaust gas cooler D, and a silencer E. The exhaust gas is purified and sent into the air box F, and the exhaust gas purified in the air box F can be supplied to the internal combustion engine A through the air cleaner H. [Selection] Figure 1

Description

  The present invention mainly relates to an exhaust gas purifying apparatus for an internal combustion engine devised so that exhaust gas discharged from an automobile, a motorcycle or other engines can be purified more reliably and efficiently.

Conventionally, as this type of exhaust gas purification device for an internal combustion engine, for example, an internal combustion engine exhaust gas purification device as disclosed in Patent Document 1 has been disclosed.
This is because hydrocarbon fuel from an external source is added to the NOx catalyst in the exhaust pipe between the exhaust manifold and the muffler of the internal combustion engine and the exhaust gas flow upstream of the NOx catalyst when the exhaust gas temperature is 180 ° C to 450 ° C. An exhaust gas purifying apparatus comprising an external hydrocarbon fuel introduction system including a pump for addition, introduction and reaction, and a spiral reaction pipe arranged in the exhaust pipe, comprising: the rotational speed of the internal combustion engine, the fuel to the internal combustion engine A computer that controls the operation of the pump to detect the load of the exhaust gas and the exhaust gas temperature upstream of the NOx catalyst, input each of these signals, and send the optimum amount of external hydrocarbon fuel to the reaction tube accordingly And a spiral cracking catalyst filled with a granular cracking catalyst.
In other words, the practical value was increased by making the exhaust gas purification device of hydrocarbon fuel (reducing agent) injection type compact, quick response, economy, improvement of NOx reduction effect and expansion of NOx catalyst activation temperature range. It has become a thing.

Japanese Patent Laid-Open No. 10-212932

  However, the inventor of the present application has continued research and development to provide an exhaust gas purification device for an internal combustion engine that can perform an exhaust gas purification process even better than the exhaust gas purification device as described above. It has been successfully devised. That is, the exhaust gas activity is increased to facilitate the burning of harmful substances, the harmful substances in the exhaust gas can be purified more reliably, and the temperature of the purified exhaust gas can be lowered, and this can be more reliably performed. Providing an exhaust gas purifying device for an internal combustion engine that can be silenced and then sent to the intake port of the internal combustion engine. In addition, the structure is simple, relatively compact, easy to maintain, and economical. To do.

  Therefore, in order to achieve the above-described problems, the exhaust gas purifying apparatus for an internal combustion engine according to claim 1 of the present invention is connected to an exhaust manifold connected to the exhaust port of the internal combustion engine A. A far-infrared generator B, a catalytic converter C connected to the far-infrared generator B, an exhaust gas cooler D connected to the catalytic converter C, and a silencer E connected to the exhaust gas cooler D And an air box F connected to the silencer E, and the exhaust gas passes through the far-infrared generator B, the catalytic converter C, the exhaust gas cooler D, and the silencer E in order, and is purified. A configuration is adopted in which the exhaust gas is sent into the air box F and the purified exhaust gas in the air box F can be supplied to the internal combustion engine A via the air cleaner H.

  In the exhaust gas purifying apparatus for an internal combustion engine according to claim 2 of the present invention, the far-infrared generator B includes a hollow cylindrical casing 1 having exhaust gas inlets and outlets provided at both ends thereof. The far-infrared light generating base material 2 formed on the inner peripheral surface of the casing 1 and a heater wire 3 capable of heating the far-infrared light generating base material 2 are provided. A means configured to heat the material 2 was adopted.

  Furthermore, in the exhaust gas purifying apparatus for an internal combustion engine according to claim 3 of the present invention, the exhaust gas cooler D includes a hollow cylindrical casing 5 provided with an exhaust gas inlet and outlet at both ends thereof. The inner tube 6 is housed in the casing 5 in a spirally wound state, and both ends thereof are connected to the inlet and outlet of the casing 5, and the outer tube 8 wound around the outer peripheral surface of the casing 5. The inner pipe 6 is formed with a large number of small holes 7 so that the exhaust gas can pass therethrough. The refrigerant gas is flowed into the outer pipe 8 so that the exhaust gas in the casing 5 is exhausted. A means for configuring the gas to be cooled was adopted.

  In the exhaust gas purifying device for an internal combustion engine according to claim 4 of the present invention, the silencer E includes a hollow cylindrical casing 10 provided with exhaust gas inlets and outlets at both ends thereof, A plurality of partition walls 11 partitioning the inside of the casing 10 in a direction from the inlet to the outlet, and a plurality of inner pipes 13 that penetrate the plurality of partition walls 11 and are formed in a twisted state. A large number of small holes 14 are formed in the penetrating inner pipe 13 so that exhaust gas can pass through. In the plurality of partition walls 11, the partition wall 11 except for the entrance wall is excluded. A number of small holes 12 were drilled, and means for increasing the number of small holes 12 in the partition wall 11 in the order closer to the outlet was adopted.

Therefore, according to the exhaust gas purification apparatus for an internal combustion engine of claim 1, the far-infrared generator B increases the activity of the exhaust gas to facilitate the combustion of harmful substances, and the catalytic converter C further reduces the harmful substances in the exhaust gas. It will surely be able to purify. In addition, the temperature of the exhaust gas purified by the exhaust gas cooler D can be lowered, the exhaust gas can be silenced by the silencer E, and the exhaust gas can be silenced more reliably by the air box F, and then the internal combustion is performed via the air cleaner H. The engine A can be supplied smoothly.
In addition, the exhaust gas purifying apparatus for an internal combustion engine is simple and has a relatively compact configuration, is easy to maintain, and is economical.

According to the exhaust gas purifying device for an internal combustion engine of claim 2, by heating the far-infrared ray generating substrate 2 by energizing the heater wire 3, the amount of far-infrared rays generated increases and passes through. As the exhaust gas becomes high temperature, its activity can be enhanced and toxic substances can be burned.
In addition, the configuration of the far-infrared generator B itself is simple, and maintenance is easy.

  Furthermore, according to the exhaust gas purification apparatus for an internal combustion engine of claim 3, the heated exhaust gas can be cooled reliably and efficiently. Moreover, the configuration of the exhaust gas cooler D itself is relatively simple, and maintenance is facilitated.

  According to the exhaust gas purification apparatus for an internal combustion engine of claim 4, the cooled exhaust gas can be silenced reliably and efficiently. In addition, the structure of the silencer E itself is relatively simple, and maintenance is easy.

It is the schematic which illustrates the exhaust-gas purification apparatus of this invention. It is sectional drawing which illustrates the far-infrared generator utilized with the exhaust-gas purification apparatus of this invention. 1 is a partially cutaway perspective view illustrating an exhaust gas cooler used in an exhaust gas purification apparatus of the present invention. It is a partially cutaway perspective view illustrating a silencer used in the exhaust gas purification apparatus of the present invention.

Hereinafter, the present invention will be described as follows.
The present invention mainly relates to an exhaust gas purification apparatus for an internal combustion engine that can more reliably and efficiently purify exhaust gas discharged from an automobile, a motorcycle, or another engine (internal combustion engine A). .
Specifically, a far-infrared generator B connected to an exhaust manifold connected to an exhaust port of the internal combustion engine A, a catalytic converter C connected to the far-infrared generator B, and connected to the catalytic converter C. An exhaust gas cooler D, a silencer E connected to the exhaust gas cooler D, and an air box F connected to the silencer E are provided.
Then, the exhaust gas passes through the far-infrared generator B, the catalytic converter C, the exhaust gas cooler D, and the silencer E in order from the internal combustion engine A and enters the air box F while being purified, cooled, and silenced. The above-described problem is achieved by being configured so that the exhaust gas purified in the air box F can be supplied to the internal combustion engine A via the air cleaner H.

  The far-infrared generator B includes, for example, a hollow cylindrical metal casing 1 provided with an exhaust gas inlet and outlet at both ends thereof, and a cylindrical far-infrared generator formed on the inner peripheral surface of the casing 1. A substrate 2 and a heatable heater wire 3 embedded (or packaged) in the far infrared ray generating substrate 2 are provided, and the far infrared ray generating substrate 2 is heated by energizing the heater wire 3. It is configured to be able to.

  The casing 1 may have a shape other than a hollow cylindrical shape or may not be made of metal.

  The far infrared ray generating base material 2 is made of a material that generates far infrared rays by heating (natural stone, processed natural stone, powdered material, or powdered material is fired. It is formed into a cylindrical shape by solidifying it into a suitable shape. The far-infrared light generating base material 2 may be a powder-like material bonded to the inner peripheral surface of the casing 1, coated or welded, or powdered in the inner peripheral surface of the casing 1. A space may be formed, and powder may be filled therein (not shown).

  Further, the heater wire 3 may be spirally embedded in the far infrared ray generating base material 2 (see FIG. 2), or spirally formed in the far infrared ray generating base material 2 (or casing 1). It may be an exterior (not shown). Moreover, in the heater wire 3, a negative electrode is connected to one end of the casing 1 where the exhaust gas inlet is on the side, and a positive electrode is connected to the other end of the casing 1 where the exhaust gas outlet is on the side. May be connected so that the activity of the exhaust gas passing through the far-infrared generator B is further enhanced.

  The catalytic converter C is formed by, for example, a hollow cylindrical metal casing provided with exhaust gas inlets and outlets at both ends thereof, and an appropriate catalyst (for example, platinum, titanium, etc.) housed in the casing. The exhaust gas is configured so that harmful components in the exhaust gas can be purified by reduction and oxidation. The catalytic converter C is supplied with exhaust gas heated by the far-infrared generator B and enhanced in activity, so that purification by reduction and oxidation of harmful components in the exhaust gas is further promoted. Become so.

The exhaust gas cooler D is, for example, a hollow cylindrical metal casing 5 provided with exhaust gas inlets and outlets at both ends thereof, and accommodated in the casing 5 in a spirally wound state. The metal inner pipe 6 is connected to the inlet and outlet of the casing 5 at both ends, and the metal outer pipe 8 is spirally wound around the outer peripheral surface of the casing 5.
A large number of small circular holes 7 are formed in the inner tube 6 so that the exhaust gas can pass therethrough, and the refrigerant gas flows in the outer tube 8 so that the inside of the casing 5 The exhaust gas can be cooled. That is, the heated exhaust gas can be reliably and efficiently cooled.

The silencer E is, for example, a hollow cylindrical casing 10 provided with an exhaust gas inlet and outlet at both ends thereof, and a plurality of disk-shaped sections that divide the casing 10 in the direction from the inlet to the outlet. The partition wall 11 includes a plurality of inner pipes 13 penetrating through the plurality of partition walls 11 and formed in a twisted state.
A large number of small circular holes 14 are formed in the through inner pipe 13 so that the exhaust gas can pass therethrough. Except for the wall 11, a large number of small circular holes 12 are formed, and the number of small holes 12 in the partition wall 11 is increased in order of increasing proximity to the outlet. That is, the cooled exhaust gas can be reliably and efficiently silenced.

The air box F is formed, for example, in the shape of a flat and relatively large hollow box so that it can be placed under the hood of the vehicle. When the exhaust gas silenced by the silencer E is sent into the air box F, the sound is further silenced and sent to the air duct G.
The air box F may be provided with a silencer separately therein, or may be formed so that external air is taken in from an air intake provided in the bonnet.

  The air duct G is formed, for example, so as to take in external air and send it to the air cleaner H, and the side wall portion and the air box F are appropriately communicated by a pipe material.

  The exhaust gas purifying device for an internal combustion engine of the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the invention.

  Therefore, according to the exhaust gas purifying apparatus for an internal combustion engine of the present invention, the far-infrared generator B increases the activity of the exhaust gas to facilitate combustion of harmful substances, and the catalytic converter C further reduces the harmful substances in the exhaust gas. The exhaust gas cooler D can be reliably purified, the temperature of the exhaust gas purified by the exhaust gas cooler D can be lowered, the exhaust gas can be silenced by the silencer E, and the exhaust gas can be silenced more reliably by the air box F. Therefore, it can be smoothly supplied to the internal combustion engine A, and harmful substances in the exhaust gas can be reduced.

A Internal combustion engine B Far-infrared generator C Catalytic converter D Exhaust gas cooler E Silencer F Air box G Air duct H Air cleaner 1 Casing 2 Far-infrared generating base 3 Heater wire 5 Casing 6 Inner tube 7 Small hole 8 Outer tube 10 Casing 11 Partition Wall 12 Small Hole 13 Through Pipe 14 Small Hole

Claims (4)

  A far-infrared generator connected to an exhaust manifold connected to an exhaust port of an internal combustion engine, a catalytic converter connected to the far-infrared generator, an exhaust gas cooler connected to the catalytic converter, and an exhaust gas cooling The exhaust gas is purified by passing through a far-infrared generator, a catalytic converter, an exhaust gas cooler, and a silencer sequentially. An exhaust gas purifying apparatus for an internal combustion engine configured to be sent into an air box and configured to supply the exhaust gas purified in the air box to the internal combustion engine via an air cleaner.   The far-infrared generator includes a hollow cylindrical casing provided with exhaust gas inlets and outlets at both ends thereof, a far-infrared generating base formed on the inner peripheral surface of the casing, and the far-infrared generating base The exhaust gas purifying device for an internal combustion engine according to claim 1, wherein the far infrared ray generating base material can be heated by energizing the heater wire.   The exhaust gas cooler is housed in the casing in a spirally wound state with a hollow cylindrical casing provided with exhaust gas inlets and outlets at both ends thereof, and both ends thereof are inlets of the casing. And an inner tube connected to the outlet and an outer tube wound around the outer peripheral surface of the casing. The inner tube is formed with a large number of small holes so that exhaust gas can pass therethrough. 3. An exhaust gas purifying apparatus for an internal combustion engine according to claim 1 or 2, wherein the exhaust gas in the casing can be cooled by flowing a refrigerant gas in the outer tube.   The silencer includes a hollow cylindrical casing provided with exhaust gas inlets and outlets at both ends thereof, a plurality of partition walls partitioning the inside of the casing in a direction from the inlet to the outlet, and the plurality of partitions. It consists of a plurality of through inner pipes that penetrate through the wall and are formed in a twisted state. In this through inner pipe, a number of small holes are drilled so that exhaust gas can pass through, In the plurality of partition walls, the entrance is formed with a large number of small holes except for the partition wall of the wall, and the number of small holes in the partition wall is increased in the order closer to the outlet. The exhaust gas purifying device for an internal combustion engine according to claim 1 or claim 2 or claim 3.

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