JP2008175161A - Exhaust gas purification device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce generation of ultrafine particles in the atmosphere due to an exhaust gas discharged from an engine even for a sold vehicle. <P>SOLUTION: An exhaust gas purification device includes: an attachable member (10) that can be attached to an outlet port of an exhaust pipe of the vehicle for discharging the exhaust gas to outside the vehicle, or in proximity to the outlet port of the exhaust pipe; an energy absorbing device (53) for absorbing energy of the exhaust gas; an energy storage device (54) for storing the energy absorbed by the energy absorbing device (53); an exhaust gas diluting device (55) that is activated by the energy stored in the energy storage device (54) to dilute the exhaust gas in the atmosphere; and a diluting device controlling means (52) for controlling the exhaust gas diluting device (55) from an amount of the energy absorbed by the energy absorbing device (53). The energy absorbing device (53), the energy storage device (54), the exhaust gas diluting device (55), and the diluting device controlling means (52) are provided to the attachable member (10). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an automobile exhaust gas purification device, and more particularly to a technique for reducing ultrafine particulate matter found in exhaust gas after being discharged and diffused into the atmosphere.

  Recent studies have begun to report that a variety of ultrafine particles that can float in the atmosphere can affect health. When fine substances such as soot containing carbon as the main component generated by burning fossil fuel are discharged into the atmosphere, the substance becomes the nucleus and the gaseous substances condense and grow. Some of them may contain problematic ultra-fine particles, which may be included in the exhaust gas of automobiles as well as household gas stoves and heaters.

  However, there is no definite method for measuring ultrafine particles, and the chemical composition, physical characteristics, and form of particles detected by the apparatus as ultrafine particles are not clear.

  Gas emitted from automobiles is diffused and diluted after being released into the atmosphere, but its shape changes due to aggregation, evaporation, etc. in the process, so the particle size distribution of particles is considered to change. . At that time, the atmospheric humidity and temperature conditions for diluting the exhaust gas, the content of the substance that becomes the core of the particles, and the dilution state with the atmosphere affect the change in the shape, and the observation results of the ultrafine particles after diffusion Research has begun to show that there are differences.

  As reported in the “Nanoparticle Generation Behavior Analysis (20055860)” of the 2005 Autumn Meeting of the Society of Automotive Engineers of Japan, the particle size of about 5 to 50 nm is reduced when the vehicle is decelerated during transient driving. There may be an increase in the number of nanoparticles. This is considered that nanoparticles are observed when the volatile components in the exhaust gas agglomerate with the core substance present in the dust and exhaust gas in the air.

However, if it is diluted at once to the same level as if it was sufficiently diffused and diluted in the atmosphere, it can prevent the nanoparticles from being observed. Therefore, by detecting and judging various driving conditions of the vehicle, when the exhaust gas is released from the exhaust pipe of the automobile to the atmosphere, the exhaust gas is forcibly diluted and released to the atmosphere, so that the nano gas is released after the exhaust gas is released to the atmosphere. Patent Document 1 discloses a technique for preventing particles from being observed.
JP 2006-132326 A

  By the way, since the technique of the said patent document 1 was proposed on the assumption that it incorporates beforehand in the specification of a motor vehicle, ie, the state of a new vehicle, it cannot be retrofitted with respect to an existing vehicle.

  Therefore, an object of the present invention is to provide a vehicle exhaust gas purifying device that can prevent observation of nanoparticles from a vehicle and that can be easily retrofitted to an existing vehicle.

  The present invention includes an attachment member (10) that can be attached to an exhaust pipe outlet or a vicinity of an exhaust pipe outlet of a vehicle that discharges exhaust gas to the outside of the vehicle, an energy absorption device (53) that absorbs the energy of the exhaust gas, and this energy absorption. An energy storage device (54) that stores the energy absorbed by the device (53), an exhaust gas dilution device (55) that operates with the energy stored in the energy storage device (54) and dilutes the exhaust gas in the atmosphere; Dilution device control means (52) for controlling the exhaust gas dilution device (55) based on the energy absorption amount of the energy absorption device (53), and the energy absorption device (53) and the energy storage device ( 54), the exhaust gas diluting device (55), and the diluting device control means (52) are provided on the mounting member (10).

  Moreover, the present invention operates with the attachment member (10) that can be attached to the exhaust pipe outlet or the vicinity of the exhaust pipe outlet of the vehicle for discharging the exhaust gas to the outside of the vehicle, and operates with the energy supplied from the vehicle to dilute the exhaust gas in the atmosphere. The exhaust gas dilution device (55) and an operation state signal input terminal for inputting an operation state signal from the vehicle, and the exhaust gas based on the operation state signal from the vehicle input to the operation state signal state input terminal A dilution device control means (52) for controlling the dilution device (55), and the exhaust gas dilution device (55) and the dilution device control means (52) are provided on the attachment member (10). .

  According to the present invention, the energy absorption device (53), the energy storage device (54), the exhaust gas dilution device (55), the dilution device control means (52), and the mounting member (10) including these are set as an exhaust pipe outlet. Since the exhaust gas purifying device is compact and can be retrofitted, the exhaust gas purifying device of the present invention can be retrofitted to an already sold vehicle. After being retrofitted, it is possible to prevent the observation of nanoparticles caused by the exhaust gas after exiting the exhaust pipe of the vehicle even if it is an already sold vehicle.

  In addition, according to the present invention, the exhaust member that can be attached to the exhaust pipe outlet or the vicinity of the exhaust pipe outlet of the vehicle that discharges the exhaust gas to the outside of the vehicle and the energy supplied from the vehicle actuate the exhaust gas in the atmosphere. An exhaust gas dilution device (55) for diluting and an operation state signal input terminal for inputting an operation state signal from the vehicle, and based on the operation state signal from the vehicle input to the operation state signal state input terminal A dilution device control means (52) for controlling the exhaust gas dilution device (55), and the exhaust gas dilution device (55) and the dilution device control means (52) are provided in the attachment member (10). Therefore, even when the vehicle is decelerated intermittently, the exhaust gas can be continuously diluted with almost no restriction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the concept and basic configuration of the exhaust gas purifying apparatus of the present invention will be described with reference to FIGS.

  FIG. 1 is an explanatory diagram of an automobile to which the present invention is applied. The engine 1 mounted on the automobile is controlled by the engine control unit 8 and burns fuel therein to generate power for rotating the wheels. At this time, the combustion gas discharged from the engine 1 is processed by the catalyst 3 so as to reduce the influence on the environment, and then is discharged out of the vehicle through the muffler 4 from the outlet of the exhaust pipe 2 (tail pipe 5 at the rear end). Is done. Since the gas discharged outside the vehicle diffuses while being diluted by the atmosphere, the dilution rate increases as the distance from the outlet of the exhaust pipe 2 (tail pipe 5) increases as shown in the drawing.

  FIG. 2 is an explanatory diagram schematically showing the change of the particulate matter after the engine 1 is discharged. The exhaust gas of the engine 1 contains extremely fine components such as carbon (indicated by black circles in the figure) and volatile components (indicated by white circles in the figure). The gaseous components and volatile components of the particles cause aggregation, and ultrafine particles with a particle size called nanoparticles are temporarily generated. When the dilution with air further proceeds, the aggregation of ultrafine particles proceeds. At the same time, volatile substances volatilize and the composition of ultra-fine particles becomes carbon-based, causing various changes.

  In the present invention, the above-mentioned “nanoparticles” refer to ultrafine particles that may affect health. The specific particle size of the nanoparticles is considered to be about 5 to 50 nm for the time being as shown in FIG. 2, but in reality it is understood what size of ultrafine particles have an effect on health. Not. Therefore, here, only a value that serves as a guide is shown.

  FIG. 3 shows the particle size distribution of ultrafine particles in the gas discharged from the tail pipe 5 (exhaust pipe) into the atmosphere. Since the exhaust gas contains a large amount of moisture and a small amount of hydrocarbons, under the condition that the dilution rate is not sufficiently diffused after being released into the atmosphere and the dilution ratio is small, the characteristics are as shown by the broken line, and the particle size is about Ultrafine particles containing about 5 to 50 nanoparticles may be measured. However, under the condition that diffusion is further performed and the dilution rate is large, the characteristic becomes as shown by the solid line, and the number of ultrafine particles decreases.

  As shown in FIG. 4, when the vehicle is traveling normally, a vortex due to the wake is generated on the rear side of the vehicle due to the vehicle speed wind, and the gas discharged from the tail pipe 5 is quickly diffused. On the other hand, even when the vehicle is traveling, dilution may not be performed quickly when an air retention area is created behind the vehicle and exhaust gas is stagnant, such as at high speeds.

  5 and 6 are first and second basic configuration diagrams of the exhaust gas purifying apparatus of the present invention. 9 and FIG. 10 described later are diagrams showing two specific configuration examples for FIG. 5, and FIG. 11 described later is a diagram showing one specific configuration example for FIG.

  Referring to FIG. 5, the combustion gas discharged from the engine 1 passes through the catalyst 3, the exhaust pipe 2, and the muffler 4 and reaches the tail pipe 5.

  The exhaust gas purifying apparatus of the present invention comprises an exhaust pipe attachment device 10, an exhaust gas amount detection device 51, an exhaust gas dilution device 55, an energy absorption device 53, an energy storage device 54, and a dilution control device 52 (dilution device control means). The exhaust pipe attachment device 10 includes all of the exhaust gas amount detection device 51, the dilution control device 52, the energy absorption device 53, the energy storage device 54, and the exhaust gas dilution device 55.

  The energy absorbing device 53 absorbs the thermal energy of the exhaust gas in FIG. 5, whereas in FIG. 6, it absorbs the kinetic energy of the exhaust gas and stores it in the energy storage device 54. As the energy absorbing device 53, a power generation device that converts the thermal energy of the exhaust gas into electric energy is used in FIG. 5, whereas a generator that is driven by the kinetic energy of the exhaust gas is used in FIG. The energy storage device 54 stores the amount of energy (generated power) absorbed in step.

  The exhaust gas amount detection device 51 directly measures (detects) the flow rate of the exhaust gas in the exhaust gas flow in the tail pipe 5 in FIG. Thus, the amount of exhaust gas is calculated from the amount of energy absorbed by the energy absorbing device 53 (energy absorption amount) (the amount of exhaust gas is indirectly detected), and the amount of exhaust gas detected or calculated in this way is calculated. A signal is sent to the dilution controller 52.

  When the dilution control device 52 determines that the amount of exhaust gas has decreased over time, or when it has been determined that the amount of exhaust gas has decreased from a state where the amount of exhaust gas is in the range of the preset exhaust gas amount, The diluter 55 is activated. When the exhaust gas dilution device 55 is activated, the exhaust gas is forcibly diluted by the atmosphere at the outlet of the tail pipe 5. That is, when the exhaust gas is released into the atmosphere, it is diluted with the atmosphere in advance. When discharging from the tail pipe 5 (exhaust pipe), it is diluted in advance to the same extent as when it is sufficiently diluted and diluted in the atmosphere. As is apparent from FIG. Observation of small particles (including nanoparticles) can be prevented.

  7 and 8 are time charts showing examples of operating states of the exhaust gas dilution device 55. FIG. Among these, FIG. 7 shows an example of the operating state of the exhaust gas diluting device 55 while the vehicle is running when the condition for diluting the exhaust gas is when the amount of exhaust gas decreases with time. In the figure, changes in the vehicle speed, the amount of exhaust gas, and the generated power are shown from the top, and the exhaust gas amount is changed only for a predetermined period from the timings t1, t4, t6, and t8, which are timings for starting the reduction of the exhaust gas amount. Dilution is performed.

  Here, the exhaust gas amount is used as a substitute value for the vehicle speed. The reason for using the exhaust gas amount is that the exhaust gas purifying device of the present invention is a retrofit device for an already-sold vehicle, and it is considered that the vehicle speed cannot be used directly. The start of decrease in vehicle speed can be detected by detecting the start of decrease in the amount of exhaust gas using the amount of exhaust gas. In other words, at the timings t6 and t8, the start of reduction of the vehicle speed can be detected by the start of reduction of the exhaust gas amount.

  Although FIG. 7 shows a case where a decrease (change) in the exhaust gas amount is detected, the energy amount (energy absorption amount) itself is calculated without calculating the exhaust gas amount from the energy amount absorbed by the energy absorbing device 53. The exhaust gas may be diluted so as to see a decrease, that is, when the energy absorption amount of the energy absorbing device 53 is decreased.

  FIG. 8 shows a case where the exhaust gas dilution is performed under the condition where the exhaust gas amount is in a predetermined exhaust gas amount region, and the exhaust gas amount is reduced in time in this exhaust gas amount region. An example of the operating state of the exhaust gas dilution device during vehicle travel is shown. In FIG. 8, the change in the exhaust gas amount is shown in the upper stage, and the exhaust gas amount is changed for a predetermined period from the timings t11, t14, and t18 which are the start timings of the exhaust gas amount decrease in the region of the preset exhaust gas amount. Dilution is performed.

  In FIG. 8, the preset exhaust gas amount region is a region of a high exhaust gas amount, that is, a region corresponding to a high load region of the engine. The exhaust gas dilution device 55 is operated when the exhaust gas amount is reduced in the high load region, particularly when the exhaust gas amount is reduced in the high load region than when the exhaust gas amount is reduced in the non-high load region. This is because many nanoparticles are observed. Actually, run the vehicle in advance, check the operating conditions (when the exhaust gas amount decreases in the high exhaust gas region) where many nanoparticles are observed, and determine the high exhaust gas region deep. For this reason, in the example shown in FIG. 8, the exhaust gas dilution device 55 is not operated at the timing of t16, which is the start timing of reduction of the exhaust gas amount in the region that is not in the high load region.

  In Figure 2 above, the carbon component is listed as the core substance of the nanoparticles, but the reason why many nanoparticles are generated especially when decelerating in the high load range (when the amount of exhaust gas decreases in the high load range) is shown. The inventor presumes the following. That is, at the time of deceleration in the high load region (when the exhaust gas amount decreases in the high load region), the fuel cut condition is normally satisfied and the fuel supply to the combustion chamber is cut. Therefore, it is unlikely that carbon atoms, which are fuel components, are contained in the exhaust gas in a large amount as a substance that becomes the core of the nanoparticles. Therefore, if the fuel is removed from the material that becomes the core of the nanoparticles, the remaining components must be found in the lubricating oil component in the combustion chamber, unburned fuel, soot in the exhaust system, and the like. For example, lubricating oil contains various additives such as polymer hydrocarbons and metals. Therefore, it is estimated that a part of this lubricating oil component evaporates in the combustion chamber in a high temperature state or is peeled off from the combustion chamber wall to become a core of nanoparticles.

  Note that the amount of energy absorbed by the energy absorbing device 53 increases as the load increases. Since the exhaust gas purifying device of the present invention is a device retrofitted to an already-sold vehicle, an energy storage device 54 is provided as an energy source for operating the exhaust gas dilution device 55 and the dilution control device 52. In the present invention, it is necessary to store a sufficient amount of energy in the energy storage device 54 by itself. In this case, since the energy absorption device 53 is a power generation device based on the heat of the exhaust gas or a generator driven by the exhaust gas, the higher the load, the larger the generated power (energy absorption amount). In other words, since the amount of energy (generated power) absorbed by the energy absorbing device 53 is small in the low load region, only the amount of energy is taken out from the energy storage device 54, whereas in the high load region, energy absorption is performed. The amount of energy (generated power) absorbed by the device 53 can be used as it is as an energy source for the exhaust gas dilution device 55 and the dilution control device 52, and surplus energy can be stored in the energy storage device 54. As described above, it is more energetically advantageous to operate the exhaust gas dilution device 55 when the exhaust gas amount decreases in the high load region.

  Next, four specific structural examples of the exhaust gas purifying apparatus of the present invention will be described with reference to FIGS. However, FIGS. 9 to 12 all show a state after the exhaust gas purifying apparatus of the present invention is retrofitted to an already sold vehicle.

  First, FIG. 9 is a schematic configuration diagram showing a first specific configuration example of the exhaust gas purifying apparatus of the present invention, in which FIG. 9 (A) is a schematic sectional view, and FIG. 9 (B) is a diagram of FIG. 9 (A). The arrow figure which looked at the apparatus from the right direction is shown.

  In the first specific configuration example, the opening area of the exhaust gas outlet of the tail pipe 5 is narrowed to increase the discharge speed of the exhaust gas from the opening having a reduced area, thereby promoting dilution and mixing with the atmosphere. It is made to let you.

  An exhaust passage fixed shutter 93 fixed to the exhaust pipe attachment device 10 and an exhaust passage movable shutter 92 operated by a movable shutter driving device 95 so as to reduce the opening area of the exhaust passage 2 are provided, and these exhaust passage movable shutters are provided. 92 and the exhaust passage fixed shutter 93 constitute an exhaust gas dilution device 55.

  More specifically, a conical member 93A is formed integrally with the exhaust pipe mounting device 10 at the downstream end of the cylindrical exhaust pipe mounting device 10, and the exhaust gas flow is blocked at the downstream end of the conical member 93A. The disc-shaped member 93B is formed integrally with the exhaust pipe attachment device 10 and orthogonal to the exhaust gas flow. As shown in FIG. 9B, the disk-shaped member 93B is equally provided with four fan-shaped notches 93C in the circumferential direction. The conical member 93A, the disk-like member 93B, and the notch 93C constitute an exhaust passage fixing shutter 93.

  On the other hand, a movable shutter driving device 95 is fixed to the axial position of the cylindrical tail pipe 5 by a column 10 </ b> A rising from the inner periphery of the exhaust pipe mounting device 10. The movable shutter driving device 95 is constituted by a piezo actuator, and a disc-shaped exhaust passage movable shutter 92 is attached to a rotating shaft of the movable shutter driving device 95 in a direction orthogonal to the flow direction of the exhaust gas. The exhaust passage movable shutter 92 is close to the disc member 93B slightly upstream of the disc member 93B, and the outer peripheral end of the exhaust passage movable shutter 92 is close to the inner peripheral surface of the conical member 93A. Is provided. In the exhaust passage movable shutter 92, as shown in FIG. 9B, four fan-shaped notches 92A are equally divided in the circumferential direction so as to face the fan-shaped notches 93C of the disk-shaped member 93B. Is provided.

  In addition, as shown in FIG. 9B, the conical member 93A has a plurality of normally open holes 94 that are always in communication with the atmosphere and are opened upstream of the position where the exhaust passage movable shutter 92 is attached. ing. The total opening area of the plurality of normally open holes 4 is set to 1/10 to 1/20 of the opening area of the tail pipe 5.

  When the movable shutter driving device 95 is not energized, the exhaust passage movable shutter 92 is kept at the initial position by a spring or the like, and at this initial position, the notch 92A of the exhaust passage movable shutter 92 and the notch of the disk-like member 93B. 93C just overlaps (exhaust passage movable shutter 92 is open), and at this time, exhaust gas is mainly discharged to the atmosphere through the overlapped notch.

  On the other hand, when a predetermined amount of electric power is supplied to the movable shutter driving device 95, the exhaust passage movable shutter 92 is closed. That is, the exhaust passage movable shutter 92 rotates to a position where the portion of the exhaust passage movable shutter 92 that is not the notch 92A and the notch 93C of the disk-like member 93B just overlap. At this time, exhaust gas is released to the atmosphere only through the normally open hole 94 that is always in communication with the atmosphere. When the exhaust passage movable shutter 92 is closed in this manner, the opening area of the exhaust gas outlet of the tail pipe 5 is narrowed compared to when the exhaust passage movable shutter 92 is opened, and the openings are narrowed from the openings (the plurality of normally open holes 94). Exhaust gas is ejected at an increased discharge rate to promote dilution and mixing with the atmosphere, thereby suppressing the generation of nanoparticles in the atmosphere.

  Here, the open / close state of the exhaust passage movable shutter 92 is basically two-position control of closing or opening, and is closed when the exhaust gas is diluted, and is opened at the other. The degree of opening of the exhaust passage movable shutter 92 may be changed according to the amount of exhaust gas. In that case, the exhaust passage movable shutter 92 is closed as the exhaust gas amount decreases. The same applies to the exhaust passage cutoff valve 102 of FIG. 10 described later.

  The movable shutter driving device 95 is not limited to a piezo actuator, but may be a motor or an artificial muscle.

  The exhaust gas amount detection device 51 is supported by an inverted U-shaped column 10 </ b> B that connects the exhaust pipe mounting device 10 and the case of the movable shutter driving device 95 so as to be positioned from the axial center of the tail pipe 5. Yes. The exhaust gas amount detection device 51 detects the exhaust gas amount passing through this part. As the exhaust gas amount detection device 51, a gas flow meter using an anemometer, a sensor for detecting a gas amount by detecting vibration due to Karman vortex, and the like can be applied.

  A cylindrical energy absorbing device 53 is attached to the outer periphery of the exhaust pipe attaching device 10, and an energy storage device 54 and a dilution control device 52 are attached to the outer periphery of the energy absorbing device 53 via a heat insulating material 97 (heat insulating structure). ing. The reason why the energy storage device 54 and the dilution control device 52 are attached via the heat insulating material 97 is to avoid the influence of heat from the exhaust gas to the devices 54 and 52.

  The energy absorption device 53 is a thermoelectric conversion device such as a thermocouple, and the energy storage device 54 is formed of a capacitor, for example. The heat energy of the exhaust gas is converted into electric energy by the energy absorbing device 53, and the converted electric energy (electric power) is stored in the energy storage device 54. The stored electric power is used for the operation of the dilution control device 52 and also used as driving power for the exhaust passage movable shutter 92 that is a component of the exhaust gas dilution device 55.

  In the dilution control device 52, based on the exhaust gas amount detected by the exhaust gas amount detection device 51, a preset condition (when the exhaust gas amount decreases or when the exhaust gas amount decreases in the high exhaust gas region). The exhaust gas dilution device 55 is actuated when it is determined that the two conditions are met.

  Thus, the exhaust gas amount detection device 51, the exhaust gas dilution device 55, the dilution control device 52 (dilution device control means), and the energy storage device 54 are all provided in the exhaust pipe mounting device 10, and these devices 51 to 55 are provided. Constitutes a set of products. After purchasing this set of products, a dealer or a maintenance shop inserts a cylindrical exhaust pipe attachment device 10 into the cylindrical tail pipe 5 from the outer periphery as shown in FIG. 9A. As a result, a set of products can be easily retrofitted to the outlet of the tail pipe 5 (exhaust pipe) of the sold vehicle as shown in FIG.

  The material of the exhaust pipe attachment device 10 attached to the tail pipe 5 is made of metal. As a method for attaching to the tail pipe 5, it is conceivable to screw in addition to the above insertion.

  FIG. 10 is a schematic configuration diagram showing a second specific configuration example of the exhaust gas purifying device, in which FIG. 10 (A) is a schematic cross-sectional view, and FIG. 10 (B) shows the device of FIG. 10 (A) in the right direction. FIG. 10C is a partially enlarged view of FIG. 10A.

  Narrowing the opening area of the exhaust pipe outlet of the tail pipe 5 is the same as the first specific configuration example shown in FIG. 9, but the second specific configuration example further promotes mixing and dilution with air. Therefore, an ejector portion that introduces traveling wind and sucks exhaust gas is provided in the vicinity of the normally open hole 103.

  In the second specific configuration example, the exhaust gas dilution device 55 includes an outlet pipe 107, an exhaust passage cutoff valve 102, a cutoff valve driving device 106, a normally open hole 103, a dilution device outer peripheral pipe 104, an ejector portion 105, and the like. The

  More specifically, a cylindrical outlet pipe 107 with a flange 107 </ b> A is formed integrally with the exhaust pipe attachment device 10 at the downstream end of the cylindrical exhaust pipe attachment device 10. A butterfly-shaped exhaust passage shut-off valve 102 driven by a piezo actuator as the shut-off valve driving device 106 is provided in the vicinity of the downstream end face of the outlet pipe 107. The shut-off valve driving device 106 is not limited to a piezo actuator, and may be a motor, an artificial muscle, or an air cylinder.

  On the other hand, the flange 107A of the outlet pipe has a ring shape, and a plurality of normally open holes 103 that are always in communication with the atmosphere are opened in the flange 107A. Since this normally open hole 103 is located upstream of the position when the exhaust passage shut-off valve 102 is closed, when the outlet pipe 107 (tail pipe outlet) is closed by the exhaust passage shut-off valve 102, the exhaust gas is always in this state. It ejects to the atmosphere from a plurality of normally open holes 103 communicating with the atmosphere.

  A dilution device outer peripheral pipe 104 is fixed to the exhaust pipe attachment apparatus 10 so as to have the same axial center as the exhaust pipe attachment apparatus 10 and the outlet pipe 107 and cover the outer periphery thereof. As shown in FIG. 10C, the inner peripheral side of the diluting device outer peripheral tube 104 is located closer to the normally open hole 103, as shown in FIG. A raised ejector portion 105 is provided. Since the dilution device outer peripheral pipe 104 and the ejector portion 105 are located outside the tail pipe 5 and the outer periphery of the outlet pipe 107 with a predetermined space, they can be made of heat-resistant resin in addition to metal.

  When the shut-off valve driving device 106 is not energized, the exhaust passage shut-off valve 102 is maintained at the initial position by a spring or the like, and at this initial position (the position indicated by the broken line in FIG. 10A), the outlet pipe 107 is connected. Mainly used to release exhaust gas to the atmosphere.

On the other hand, when a predetermined amount of electric power is supplied to the movable shutter driving device 95, the exhaust passage shut-off valve 102 rotates to a position where the outlet pipe 107 is shut off, and the tail pipe opening is closed.
At this time, the exhaust gas is ejected to the ejector portion 105 through the plurality of normally open holes 103 that are always communicated with the atmosphere. Therefore, the exhaust gas is ejected from the normally open hole 103 to the space between the diluter outer peripheral pipe 104 and the ejection speed by increasing the ejection speed. At this time, the ejector unit 105 (ejector structure) sucks air in the air sucking unit 108, and the mixing unit 109 mixes the sucked air with the exhaust gas ejected from the normally open hole 103. In the dilution section 110, the exhaust gas is further diluted and mixed with air while the volume of the gas expands.

  In the vicinity of the upstream side of the exhaust passage shutoff valve 102, the exhaust gas amount detection device 51 is supported by a column 10 </ b> C that hangs down from the exhaust pipe attachment device 10. As the exhaust gas amount detection device 51, a hot wire with temperature compensation, a hot film type anemometer, or the like can be used other than the one described with reference to FIG.

  An energy absorption device 53 is attached to the outer periphery of the exhaust pipe attachment device 10, and an energy storage device 54 and a dilution control device 52 are attached to the outer periphery of the dilution device outer pipe 104 in order to avoid the influence of heat from the exhaust gas. ing. The thermal energy of the exhaust gas is recovered as electric energy (electric power) by the energy absorbing device 53, and the recovered electric power is stored in the energy storage device 54. The dilution control device 52 activates the exhaust gas dilution device 55 when it is determined that a preset condition (when the exhaust gas amount decreases or when the exhaust gas amount decreases in the high exhaust gas region) is met.

  Thus, also in the second specific configuration example, the exhaust gas amount detection device 51, the exhaust gas dilution device 55, the dilution control device 52 (dilution device control means), and the energy storage device 54 are all included in the exhaust pipe attachment device 10. These devices 51-55 constitute a set of products. After this set of products is purchased, the cylindrical metal exhaust pipe mounting device 10 is attached to the cylindrical metal tail pipe 5 as shown in FIG. By inserting and attaching from the outer periphery, one set of products is retrofitted to the outlet of the tail pipe 5 (exhaust pipe) of the sold vehicle as shown in FIG.

  Here, the effects of the first and second specific configuration examples will be described.

  According to the first and second specific configuration examples (the invention described in claim 1), the energy absorption device 53, the energy storage device 54, the exhaust gas dilution device 55, the dilution control device 52 (dilution device control means) and Since the exhaust pipe attachment device 10 (attachment member) provided with these comprises a compact and retrofitted exhaust gas purification device that can be retrofitted to the tail pipe 5 at the exhaust pipe outlet, the first and second specific configurations An example exhaust gas purification device can be retrofitted to an existing vehicle. Then, after retrofitting the exhaust gas purifying apparatus of the first and second specific configuration examples to the already-sold car, even if it is a already-sold car, it is caused by the exhaust gas after exiting from the tail pipe 5 (exhaust pipe) of the vehicle. Nanoparticles can be prevented from being observed.

  Further, if the exhaust gas dilution device 55 is always operated regardless of the amount of exhaust gas, the energy stored in the energy storage device 54 is insufficient, and the exhaust gas dilution device 55 cannot be operated. However, according to the first and second specific configuration examples (the invention described in claim 2), the conditions under which nanoparticles are expected to be observed, that is, when the amount of exhaust gas is reduced (the energy absorption amount is temporally reduced). Or when the exhaust gas amount decreases in the high exhaust gas region (when it is determined that the energy absorption amount has decreased in time from the state of the preset energy absorption region). Since the exhaust gas dilution device 55 is operated, the chance of occurrence of a situation where the exhaust gas dilution device 55 cannot be operated can be reduced.

  According to the first and second specific configuration examples (the invention described in claim 4), the energy absorption device 53 is a power generation device using the heat of the exhaust gas, and therefore the exhaust gas dilution device 55 and the dilution control device 52. Electric energy necessary for the operation of the (dilution device control means) can be obtained.

  According to the first specific configuration example (the invention described in claim 6), the exhaust gas dilution device 55 includes an exhaust passage movable shutter 92 (movable shutter) capable of opening and closing the tail pipe 5 (exhaust pipe), Since it comprises a normally open hole 94 that is always in communication with the atmosphere upstream of the exhaust passage movable shutter 92, the exhaust gas is ejected from the normally open hole 94 by increasing the ejection speed when the exhaust gas dilution device 55 is operated. Can promote dilution and mixing with the atmosphere.

  According to the second specific configuration example (the invention described in claim 7), the exhaust gas is introduced in the vicinity of the normally open hole 103 to suck the exhaust gas by introducing the traveling wind, so that the exhaust gas When the dilution device 55 is operated, the ejection speed can be increased from the ejector unit 105 to eject the exhaust gas, and the dilution and mixing with the atmosphere can be promoted.

  According to the first specific configuration example (the invention according to claim 9), the exhaust pipe attachment device 10 (attachment member) is attached to the outer periphery of the tail pipe 5 (exhaust pipe), and the energy storage device 54 and dilution control are provided. Since the device 52 (dilution device control means) is installed on the outer periphery of the exhaust pipe attachment device 10 via a heat insulating material 97 (heat insulation structure), heat from the exhaust gas to the energy storage device 54 and the dilution control device 52 is provided. Can be avoided.

  According to the second specific configuration example (the invention described in claim 10), the exhaust pipe attachment device 10 (attachment member) is attached to the outer periphery of the tail pipe 5 (exhaust pipe), and the tail pipe 5 (exhaust pipe). A diluter peripheral pipe 104 that covers the outer periphery of the diluter with a predetermined space is attached to the exhaust pipe attachment device 10. The energy storage device 54 and the dilution control device 52 (dilution device control means) Therefore, the influence of heat from the exhaust gas to the energy storage device 54 and the dilution control device 52 can be avoided.

  Next, FIG. 11 is a schematic configuration diagram showing a third specific configuration example of the exhaust gas purification device, in which FIG. 11A is a schematic cross-sectional view, and FIG. 11B is the device of FIG. The arrow figure which looked at from the right direction is shown.

  In the third specific configuration example, detection of the amount of exhaust gas and absorption of heat energy of the exhaust gas are performed by the turbine 112 having a generator driven by the exhaust gas, and dilution of the exhaust gas is performed by another turbine. This is the structure performed at 113.

  More specifically, a cylindrical metal exhaust pipe attachment device 10 is attached to the opening of the cylindrical metal tail pipe 5. At the axial center position of the tail pipe 5, an energy absorbing device 53 that is a turbine 112 having a generator driven by exhaust gas is supported by a column 10 </ b> A from the exhaust pipe mounting device 10. In the power generation turbine 112, when the exhaust gas is received, the turbine blade 112A rotates the turbine shaft, the rotation of the turbine shaft is received by the rotation of the turbine shaft, and the internal generator generates power. That is, the kinetic energy of the exhaust gas is recovered as electric energy (electric power) by the power generation turbine 112.

  Further, a second turbine 113 having the same axis as that of the power generation turbine 112 is rotatably supported by the attachment device 10. In a state where the motor for the second turbine 113 is not energized, the second turbine 113 is in a stopped state. On the other hand, when a predetermined amount of electric power is supplied to the motor for the second turbine 113, the second turbine 113 rotates and a plurality of turbines extend radially outward from the outer periphery of the second turbine 113. The blade 113A stirs and dilutes the exhaust gas and air. In the third specific configuration example, the exhaust gas dilution device 55 is configured by the second turbine 113 and a dilution device outer peripheral pipe 104 described later.

  Although the two turbines 112 and 113 are disposed on the same axis, their rotational axes are different axes. Here, it is assumed that the power generation turbine 112 is basically smaller than the second turbine 113 and is generated by a small turbine. This is because a small turbine is easier to rotate. However, both dilution and power generation may be performed by the power generation turbine 112 or the second turbine 113.

  The exhaust pipe attachment device 10 and the second turbine 113 have the same axial center as the outer periphery thereof, and a dilution device outer peripheral pipe 104 made of metal or heat-resistant resin is supported by the exhaust pipe attachment device 10. An exhaust gas amount detection device 51, a dilution control device 52, and an energy storage device 54 are provided on the outer periphery of the pipe 104. More specifically, in order to reduce the influence of the exhaust gas on the devices 51, 52, and 54, a trumpet-shaped traveling wind formed integrally with the dilution device outer tube 104 at the upstream end of the dilution device outer tube 104. It is installed on the outer periphery of the introduction cover 111.

  In the third specific configuration example, the output (electric power) of the energy absorption device 53 is input to the exhaust gas amount detection device 51 and the energy storage device 54. The energy storage device 54 stores power from the energy absorption device 53, and the power stored by the energy storage device 54 is used as an operation power source (IC power source) of the exhaust gas dilution device 55 and the dilution control device 52. Is done.

  The exhaust gas amount detection device 51 calculates the current exhaust gas amount from the voltage generated by the power generation turbine 112 (indirectly detects the exhaust gas amount), and uses the calculated exhaust gas amount signal as a dilution control device 52. Send to. When it is determined that the dilution control device 52 meets a preset condition (when the exhaust gas amount decreases or when the exhaust gas amount decreases in the high exhaust gas region) based on the exhaust gas amount signal, A signal for operating the turbine 113 is output to the second turbine 113 (exhaust gas dilution device 55). When the second turbine 113 receives an instruction from the dilution control device 52, the second turbine 113 rotates, whereby the plurality of turbine blades 113A agitate the exhaust gas discharged into the dilution device outer tube 104 with air. Then dilute.

  As described above, according to the third specific configuration example (the invention described in claim 1), the energy absorption device 53, the energy storage device 54, the exhaust gas dilution device 55, the dilution control device 52 (dilution device control means) and Since the exhaust pipe attachment device 10 (attachment member) having these components constitutes an exhaust gas purification device that is compact and can be retrofitted to the tail pipe 5 at the exhaust pipe outlet as a set, the exhaust of the third specific configuration example A gas purifier can be retrofitted to an existing vehicle. And after retrofitting the exhaust emission control device of the third specific configuration example to the already-sold vehicle, the nanoparticles resulting from the exhaust gas after exiting from the tail pipe 5 (exhaust pipe) of the vehicle even in the already-sold vehicle It can be prevented from being observed.

  Further, according to the third specific configuration example (the invention described in claim 3), the exhaust gas amount is calculated by calculating the exhaust gas amount based on the power generation voltage (energy absorption amount) generated by the power generation turbine 112. An exhaust gas amount detection device 51 that detects indirectly is provided, and the dilution control device 52 (dilution device control means) is configured to reduce the exhaust gas amount when the exhaust gas amount decreases (the exhaust gas amount indirectly detected by the exhaust gas amount detection device 51). When it is determined that the exhaust gas amount has decreased in time) or when the exhaust gas amount is decreasing in the high exhaust gas amount region (the exhaust gas amount indirectly detected by the exhaust gas amount detection device 51 is a predetermined exhaust gas amount region) The exhaust gas dilution device 55 is operated when the exhaust gas amount indirectly detected by the exhaust gas amount detection device 51 is determined to have decreased in terms of time), a dedicated sensor such as a gas flow meter Finished without providing an exhaust gas amount detector) for directly detecting the exhaust gas amount, the cost can be reduced.

  According to the third specific configuration example (the invention described in claim 5), the energy absorption device 53 is the turbine 112 having the generator driven by the exhaust gas. Electric energy required for the operation of the control device 52 (dilution device control means) can be obtained.

  According to the third specific configuration example (the invention described in claim 8), the exhaust gas diluting device 55 includes a diluting device outer tube that covers the outer periphery of the tail pipe 5 (exhaust pipe rear end) with a predetermined space. 104 (outer peripheral pipe) and the turbine blade 113A (swirl blade) that is disposed inside the outer peripheral pipe 104 of the diluting device and mixes the exhaust gas and the atmosphere. Therefore, when the exhaust gas diluting device 55 is in operation, The exhaust gas can be stirred by the turbine blade 113A, and dilution and mixing with air can be promoted.

  According to the third specific configuration example (the invention described in claim 11), the exhaust pipe attachment device 10 (attachment member) is attached to the outer periphery of the tail pipe 5 (exhaust pipe). A diluting device outer peripheral pipe 104 covering the space is attached to the exhaust pipe attaching device 10, and a running wind introduction cover 111 for introducing a running wind is attached upstream of the diluting device outer peripheral tube 104, and the energy storage device 54 and dilution control are installed. Since the device 52 (dilution device control means) is installed on the outer periphery of the traveling wind introduction cover 111, the influence of heat from the exhaust gas to the energy storage device 54 and the dilution control device 52 can be avoided.

  FIG. 12 is a schematic configuration diagram showing a fourth specific configuration example of the exhaust gas purification device.

  In the above three specific configuration examples, the exhaust gas amount detection signal used for dilution of the exhaust gas and the energy for operating the exhaust gas dilution device 55 and the dilution control device 52 are used in the exhaust gas purification device of the present invention. It was based on the idea to be covered in.

  However, it is conceivable that the operation state detection signal of the vehicle used on the vehicle side can be easily extracted or the power supply from the vehicle can be easily performed.

  Accordingly, in the fourth specific configuration example, for the purpose of improving the performance of the exhaust gas purifying apparatus of the present invention, the vehicle operating state detection signal from the engine control unit 8 and the energy (electric energy) used in the vehicle, Is input to the exhaust gas purifying apparatus of the present invention. That is, in the fourth specific configuration example, the exhaust pipe attachment device 10 includes an exhaust gas amount detection device 51, a dilution control device 52, an energy storage device 54, and a second turbine 114 (exhaust gas dilution device 55). It is.

  More specifically, the vehicle is provided with a driving state detection signal output terminal (not shown) for outputting a driving state detection signal of the vehicle and a power output terminal (not shown) for outputting the power of the vehicle. Shall. Since the energy absorption device is not provided in the fourth specific configuration example, an operation state detection signal input terminal (not shown) for inputting a vehicle operation state detection signal to the dilution control device 52 and electric power from the vehicle are input. And a power input terminal (not shown).

  For this reason, after the exhaust pipe attachment device 10 including the three devices 51, 52, 54 and the second turbine 114 is attached to the tail pipe 5 in the same manner as in the above-described three specific configuration examples, the above operation is performed. A state detection signal output terminal and a driving state detection signal input terminal are connected by a cord to form a vehicle driving state detection signal input line 121. Further, the power output terminal and the power input terminal are connected with a cord to form the existing power input line 122.

  Then, the electric power supplied from the vehicle via the existing electric power input line 122 is stored in the energy storage device 54. As the energy storage device 54, for example, a secondary battery is used, and this secondary battery is used as a drive power source for the dilution control device 52. The energy storage device 54 may be configured by a transformer, and 12V used in the vehicle may be converted to 5V, and the 5V may be used as a power source for the dilution control device 52.

  In the dilution control device 52, the exhaust gas amount detected by the exhaust gas amount detection device 51 is used to determine whether or not a preset condition is met. That is, based on the exhaust gas amount detected by the exhaust gas amount detection device 51, it is determined that the preset condition (when the exhaust gas amount decreases or when the exhaust gas amount decreases in the high exhaust gas region) is met. When the determination is made, the electric power supplied from the vehicle via the existing electric power input line 122 and the electric power from the energy storage device 54 are used together and supplied to the second turbine 114 (exhaust gas diluting device 55). The turbine 114 is rotated or the electric power supplied from the vehicle via the existing electric power input line 122 is mainly used, and the electric power from the energy storage device 54 is complementarily supplied to the second turbine 114 (exhaust gas dilution device 55). Then, the second turbine 114 is rotated and the exhaust gas is diluted at the outlet of the tail pipe 5.

  Further, the vehicle speed as the vehicle operation state detection signal is input from the engine control unit 8 (see FIG. 1) to the dilution control device 52 via the vehicle operation state detection signal input line 121, and the dilution control device 52 is based on this vehicle speed. When it is determined that the preset condition (when the vehicle speed decreases or when the vehicle speed decreases in the high vehicle speed region) is satisfied, the power supplied from the vehicle via the existing power input line 122 and the energy storage device 54 The second turbine 114 (exhaust gas diluting device 55) is used in combination with the other power to rotate the second turbine 114, or the power supplied from the vehicle via the existing power input line 122 is mainly used. In addition, the power from the energy storage device 54 is interpolatedly supplied to the second turbine 114 (exhaust gas dilution device 55) to cause the second turbine 114 to Rolling is operated to dilute the exhaust gas at the outlet of the tail pipe 5.

  The vehicle operating state detection signal is not limited to the vehicle speed, but may be a throttle opening in a gasoline engine or a fuel injection amount in a diesel engine. In this case, since the vehicle state detection signal of the throttle opening and the fuel injection amount is input from the engine control unit 8 (see FIG. 1) to the dilution control device 52 via the vehicle state detection signal input line 121, dilution is performed. When the control device 52 determines that a condition set in advance based on the throttle opening (when the throttle opening decreases or when the throttle opening decreases in the high throttle opening region) is satisfied, or when the fuel injection amount is The electric power supplied from the vehicle via the existing electric power input line 122 when it is determined that the predetermined condition (when the fuel injection amount is decreased or when the fuel injection amount is decreased in the high fuel injection amount region) is met. And the electric power from the energy storage device 54 are used together and supplied to the second turbine 114 (exhaust gas dilution device 55) to rotate the second turbine 114. Or the electric power supplied from the vehicle via the existing electric power input line 122 is mainly supplied, and the electric power from the energy storage device 54 is interpolated and supplied to the second turbine 114 (exhaust gas dilution device 55). The second turbine 114 is rotated to dilute the exhaust gas at the outlet of the tail pipe 5.

  As described above, according to the fourth specific configuration example (the invention described in claim 14), the exhaust pipe attachment device 10 (can be attached to the exhaust pipe outlet or the vicinity of the exhaust pipe outlet of the vehicle that discharges exhaust gas outside the vehicle). A mounting member), an exhaust gas dilution device 55 that operates with energy supplied from the vehicle and dilutes exhaust gas in the atmosphere, and an operation state detection signal input terminal for inputting an operation state detection signal (operation state signal) from the vehicle A dilution control device 52 (dilution device control means) which has an (operation state signal input terminal) and controls the exhaust gas dilution device 55 based on the driving state detection signal from the vehicle input to the driving state detection signal input terminal. The exhaust gas diluting device 55 and the dilution control device 52 are provided in the exhaust pipe mounting device 10, so that even when the vehicle is decelerated intermittently, the exhaust gas diluting device 55 and the dilution control device 52 are almost without restriction. It can be continuously performed dilution gas. When the exhaust gas is frequently diluted by the exhaust gas purifying apparatus of the fourth specific configuration example, the energy absorption device 53 (first and second specific configuration examples) is used in the above three specific configuration examples. ) And the power generation amount generated by the power generation turbine 112 (third specific configuration example), the movable shutter drive device 95 (first specific configuration example), the shut-off valve drive device 106 (second specific configuration example). ), The amount of power used by the second turbine 113 (third specific configuration example) becomes larger, and there may occur a situation where the exhaust gas cannot be substantially diluted. Since the configuration example receives power from the vehicle, the exhaust gas can be diluted without limitation.

  In the fourth specific configuration example (the invention described in claim 14), an input of a vehicle driving state detection signal from the engine control unit 8 and an input of electric power from the vehicle are additionally required. Since it is possible to determine (detect) the deceleration start of the vehicle earlier than the start of the decrease in the exhaust gas amount, it is possible to perform control more quickly than the above-described three specific configuration examples. In FIG. 7, the timing for starting deceleration of the vehicle (starting to decrease the vehicle speed) and the timing for starting decreasing the exhaust gas amount are the same (see t6 and t8). In fact, the timing for starting deceleration of the vehicle (starting to decrease the vehicle speed) comes before the timing for starting to decrease the exhaust gas amount.

  Next, a fifth specific configuration example will be described. The fifth specific configuration example is the same as the fourth specific configuration example, and driving state detection for outputting a driving state detection signal of the vehicle to the vehicle side. A driving state detection signal input terminal (not shown) for inputting a driving state detection signal of the vehicle to the dilution controller 52 is provided with a signal output terminal (not shown) and a power source output terminal (not shown) for outputting the power of the vehicle. ) And a power input terminal (not shown) for inputting electric power from the vehicle, the exhaust gas purifying apparatus of the first, second, and third specific configuration examples is the tail pipe 5. After connecting to the above, the driving state detection signal output terminal and the driving state detection signal input terminal are connected with a cord, the vehicle driving state detection signal input line is connected, and the power output terminal and the power input terminal are connected with a cord. Connect with It is obtained so as to form respectively an existing power input line.

  In the fifth specific configuration example, since the driving state detection signal of the vehicle can be used, the driving state detection from the vehicle input to the driving state detection signal input terminal by the dilution control device 42 (dilution device control means). When it is determined based on the signal that a preset condition (when the exhaust gas amount decreases or when the exhaust gas amount decreases in the high exhaust gas region) is met, the exhaust gas dilution device 55 is activated.

  Further, the electric power input to the power input terminal and the energy stored in the energy storage device 54 are used in combination. It is also possible to use the energy stored in the energy storage device 54 in a complementary manner, mainly using the power input to the power input terminal.

The model figure explaining the dilution state in the atmosphere of the exhaust gas discharged | emitted from the vehicle. Explanatory drawing which shows the change of the particulate matter after engine discharge as a model. The characteristic view which shows the particle size distribution of the particulate matter which changes with dilution rates. Explanatory drawing which shows the flow of the air during vehicle travel. FIG. 1 is a first basic configuration diagram of an exhaust gas purifying apparatus according to the present invention. The 2nd basic composition figure of the exhaust gas purification device of the present invention. The time chart which shows an example of the operating state of an exhaust gas dilution apparatus. The time chart which shows the example from which the operating state of an exhaust-gas dilution apparatus differs. The schematic block diagram which shows the 1st specific structural example of an exhaust-gas purification apparatus. The schematic block diagram which shows the 2nd specific structural example of an exhaust-gas purification apparatus. The schematic block diagram which shows the 3rd specific structural example of an exhaust-gas purification apparatus. The schematic block diagram which shows the 4th specific structural example of an exhaust-gas purification apparatus.

Explanation of symbols

1 Engine 2 Exhaust pipe 5 Tail pipe (exhaust pipe)
10 Exhaust pipe attachment device (attachment member)
51 Exhaust gas amount detection device 52 Exhaust gas dilution control device (dilution device control means)
53 Energy absorber 54 Energy storage device 55 Exhaust gas dilution device 92 Exhaust passage movable shutter (movable shutter)
93 Exhaust passage fixed shutter 94 Normally open hole 95 Movable shutter drive device 97 Heat insulation material (heat insulation structure)
102 Exhaust passage shutoff valve (shutoff valve)
103 Normally open hole 104 Diluting device outer tube (outer tube)
105 Ejector (Ejector structure)
106 Shut-off valve drive device 107 Outlet pipe 111 Traveling wind introduction cover 112 Power generation turbine 113 Second turbine 113A Turbine blade (swirl blade)
114 Second turbine 121 Vehicle operation state detection signal input line 122 Existing power input line

Claims (14)

A mounting member that can be attached to the exhaust pipe outlet or the vicinity of the exhaust pipe outlet of the vehicle that discharges exhaust gas outside the vehicle;
An energy absorption device that absorbs the energy of the exhaust gas;
An energy storage device for storing energy absorbed by the energy absorption device;
An exhaust gas dilution device that operates with the energy stored in the energy storage device and dilutes the exhaust gas in the atmosphere;
Dilution device control means for controlling the exhaust gas dilution device based on the energy absorption amount of the energy absorption device;
The exhaust gas purifying apparatus for a vehicle, wherein the attachment member includes the energy absorbing device, the energy storage device, the exhaust gas diluting device, and the diluting device control means.   The diluting device control means determines that the energy absorption amount has decreased with time, or if the energy absorption amount has decreased with time, from a state where the energy absorption amount is within a preset energy absorption region. 2. The exhaust gas purifying device for a vehicle according to claim 1, wherein the exhaust gas dilution device is operated when the determination is made. An exhaust gas amount detection device that indirectly detects the exhaust gas amount by calculating the exhaust gas amount based on the energy absorption amount or an exhaust gas amount detection device that directly detects the exhaust gas amount;
The dilution device control means determines that the amount of exhaust gas detected indirectly by the exhaust gas amount detection device has decreased over time or the amount of exhaust gas detected indirectly by the exhaust gas amount detection device The exhaust gas dilution device is operated when it is determined that the exhaust gas amount indirectly detected by the exhaust gas amount detection device has decreased in time from the state in which the exhaust gas amount is in the range of the preset exhaust gas amount. The exhaust gas purifying device for a vehicle according to claim 2,   The exhaust gas purifying device for a vehicle according to claim 1, wherein the energy absorbing device is a power generation device using heat of the exhaust gas.   The exhaust gas purifying device for a vehicle according to claim 1, wherein the energy absorbing device is a generator driven by the exhaust gas.   2. The vehicle according to claim 1, wherein the exhaust gas dilution device includes a movable shutter capable of opening and closing an exhaust pipe outlet, and a normally open hole that is always in communication with the atmosphere upstream of the movable shutter. Exhaust gas purification device. The exhaust gas dilution device comprises a shut-off valve that can open and close the exhaust pipe outlet, and a normally open hole that is always in communication with the atmosphere upstream of the shut-off valve,
2. The exhaust gas purifying device for a vehicle according to claim 1, further comprising an ejector structure that introduces traveling wind in the vicinity of the normally open hole and sucks exhaust gas.   The exhaust gas dilution device is configured to include an outer peripheral pipe that covers a rear end outer periphery of the exhaust pipe with a predetermined space, and a swirl vane that is disposed inside the outer peripheral pipe and mixes exhaust gas and the atmosphere. The exhaust emission control device for a vehicle according to claim 1. The attachment member is attached to the outer periphery of the exhaust pipe,
The exhaust gas purifying device for a vehicle according to claim 1, wherein the energy storage device and the diluting device control means are installed on the outer periphery of the mounting member via a heat insulating structure. The attachment member is attached to the outer periphery of the exhaust pipe,
An outer peripheral pipe that covers the outer periphery of the exhaust pipe with a predetermined space is attached to the attachment member,
2. The exhaust gas purifying apparatus for a vehicle according to claim 1, wherein the energy storage device and the diluting device control means are installed on the outer periphery of the outer peripheral tube. The attachment member is attached to the outer periphery of the exhaust pipe,
An outer peripheral pipe that covers the outer periphery of the exhaust pipe with a predetermined space is attached to the attachment member,
A traveling wind introduction cover that introduces traveling wind is installed upstream of the outer pipe,
The exhaust gas purifying apparatus for a vehicle according to claim 1, wherein the energy storage device and the diluting device control means are installed on an outer periphery of the traveling wind introduction cover.   The dilution device control means has an operation state signal input terminal for inputting an operation state signal from the vehicle, and the exhaust gas dilution device is controlled based on the operation state signal from the vehicle input to the operation state signal input terminal. The vehicle exhaust gas purification device according to claim 1, wherein the vehicle exhaust gas purification device is controlled.   A power input terminal for inputting power from the vehicle, and the power input to the power input terminal and the energy stored in the energy storage device are used in combination or input to the power input terminal; The vehicle exhaust gas purification device according to claim 4 or 5, wherein the energy stored in the energy storage device is used in a complementary manner mainly by electric power. A mounting member that can be attached to the exhaust pipe outlet or the vicinity of the exhaust pipe outlet of the vehicle that discharges exhaust gas outside the vehicle;
An exhaust gas dilution device that operates with energy supplied from a vehicle and dilutes exhaust gas in the atmosphere;
A diluting device control means for controlling the exhaust gas dilution device based on the driving state signal from the vehicle input to the driving state signal state input terminal, having a driving state signal input terminal for inputting the driving state signal from the vehicle. And
The exhaust gas purifying apparatus for a vehicle, wherein the exhaust gas diluting device and the diluting device control means are provided on the mounting member.