WO2017221962A1 - Accélérateur de flux de gaz d'échappement - Google Patents

Accélérateur de flux de gaz d'échappement Download PDF

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Publication number
WO2017221962A1
WO2017221962A1 PCT/JP2017/022804 JP2017022804W WO2017221962A1 WO 2017221962 A1 WO2017221962 A1 WO 2017221962A1 JP 2017022804 W JP2017022804 W JP 2017022804W WO 2017221962 A1 WO2017221962 A1 WO 2017221962A1
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WO
WIPO (PCT)
Prior art keywords
exhaust gas
gas flow
tail pipe
acceleration
cylinder
Prior art date
Application number
PCT/JP2017/022804
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English (en)
Japanese (ja)
Inventor
義明 角田
Original Assignee
義明 角田
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 義明 角田 filed Critical 義明 角田
Publication of WO2017221962A1 publication Critical patent/WO2017221962A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/04—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using kinetic energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/20—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having flared outlets, e.g. of fish-tail shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/04—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues in exhaust systems only, e.g. for sucking-off combustion gases
    • F02B27/06—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues in exhaust systems only, e.g. for sucking-off combustion gases the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to an apparatus that is installed at the end of an exhaust system of an internal combustion engine and accelerates an exhaust gas flow to release it into the atmosphere.
  • an exhaust system not only releases exhaust gas generated by combustion to the atmosphere, but also plays an important role in adjusting exhaust gas components and reducing exhaust noise.
  • the exhaust system has become more complicated and the back pressure tends to increase.
  • the inventor of the present case has been working on a technique for speeding up exhaust gas and releasing it to the atmosphere, and has applied for a patent for a part of the results and tried to disclose the technique.
  • Japanese Patent Laid-Open No. 6-173634 is an invention in which scavenging is promoted by providing a bypass path in the exhaust system to increase the exhaust gas flow rate and reducing the back pressure
  • Japanese Patent Laid-Open No. 7-233722 is an exhaust pipe in the exhaust pipe.
  • Japanese Patent Laid-Open No. 8-326547 which is provided with a reflux tube for taking out gas and refluxing it, and solving the problem of heat damage, has an acceleration section in two stages, upper and lower, for accelerating the exhaust gas flow and generating negative pressure. It is an invention for generating a high level of negative pressure suction energy.
  • Japanese Patent Laid-Open No. 10-331631 is an engine designed to ensure high-speed discharge.
  • Japanese Patent Application Laid-Open No. 2001-98924 is an invention that aims to reduce the size of a muffler having an early acceleration effect.
  • the present invention has been made in view of the above points, and an object thereof is to make it possible to appropriately adjust the acceleration of the exhaust gas flow in accordance with the operating environment of the internal combustion engine, the exhaust amount, and the like. Another object of the present invention is to provide an exhaust gas flow accelerating device that can be appropriately installed even if it is not necessarily a skilled engineer.
  • the present invention provides an apparatus for accelerating an exhaust gas flow and releasing it to the atmosphere at one end of an exhaust system of an internal combustion engine.
  • the exhaust gas inflow side for receiving the exhaust gas, and the other end is the exhaust gas outflow side from which the exhaust gas is released to the atmosphere.
  • Exhaust gas having a cylindrical acceleration portion provided for accelerating the flow in the central portion and an opening portion provided for flowing a flow other than mainly the central portion of the exhaust gas flow outside the acceleration portion
  • the system to which the present invention belongs can not be said to be technically elucidated despite the fact that a remarkable effect is actually obtained.
  • the element that is accelerated by the passage of the acceleration cylinder provided inside the acceleration device, the element that passes outside the acceleration cylinder, and the element that the above two elements merge downstream of the acceleration section are released into the atmosphere. It is involved in the acceleration of gas flow, and it has been found that the acceleration result depends on the apportionment of these factors.
  • the present invention is configured so that the degree to which these elements contribute can be adjusted more easily, and is intended to contribute to solving the problems of the invention.
  • the exhaust gas flow accelerating cylinder having the acceleration portion and the opening provided in the apparatus main body, the tail pipe and the adjusting mechanism are particularly important constituent elements.
  • the exhaust gas flow expands once it flows into the device main body from the end of the exhaust system, and is divided into a central flow and other flows, and the accelerating portion mainly accelerates the central flow to generate negative pressure. The flow other than is sucked to the negative pressure at the opening and accelerated.
  • the nozzle diameter of the accelerating portion has a cross-sectional area smaller than the cross-sectional area of the end of the exhaust system, but it is not always necessary to squeeze that way.
  • a form in which the cross-sectional area changes stepwise (discontinuously) can also be selected.
  • the adjustment mechanism enables the tail pipe to move in the front-rear direction with respect to the apparatus main body, thereby adjusting the distance between the exhaust gas accelerating cylinder and the tail pipe.
  • the tail pipe is slidably mounted on the apparatus body and is movably provided by manual operation. It is provided so as to be fixed at the moving position. This is a preferable form as an example in which the adjustment mechanism is configured manually.
  • the tail pipe is slidably attached to the main body of the device as an adjustment mechanism that allows the distance between the exhaust gas flow acceleration cylinder and the tail pipe to be adjusted. In response to this, it has a negative pressure sensitive part configured to be automatically movable. This is a preferable form as an example in which the adjusting mechanism is configured automatically.
  • the tail pipe has a negative pressure sensitive portion at the front end portion that is sucked by the negative pressure generated downstream of the exhaust gas flow acceleration cylinder and collides with the exhaust gas flow flowing outside the exhaust gas flow acceleration cylinder. Also good. By receiving the pressure of the exhaust gas flow, the pressure receiving portion moves backward in a direction that widens the interval between the acceleration cylinder and the tail pipe.
  • a sensor that detects the state of the exhaust gas flow
  • a control unit that outputs a movement amount according to the sensor signal
  • a mechanism that operates according to the above output A configuration including a motor and a moving mechanism for moving the tail pipe by the motor is preferable in the present invention.
  • negative pressure means a pressure lower than a reference pressure.
  • the pressure of an exhaust gas flow flowing through the exhaust system is a reference pressure.
  • the present invention is configured and operates as described above, there is an effect that the acceleration degree of the exhaust gas flow can be appropriately adjusted according to the operating environment of the internal combustion engine, the exhaust amount, and the like.
  • the tail pipe can be moved in the front-rear direction with respect to the apparatus main body, and the distance from the exhaust gas flow accelerating cylinder can be adjusted, so that it is extremely easy to cope with conditions such as engine displacement.
  • FIG. 5 shows an example 2 of an apparatus applied to FIG.
  • FIG. 7 shows an example 3 of the apparatus applied to FIG. 1, wherein A is a longitudinal sectional view, and B is a sectional view taken along the line VIB-VIB in FIG. 6A.
  • FIG. 6 is a longitudinal cross-sectional explanatory view showing Example 4 of the device applied to FIG. 1. It is explanatory drawing which shows Example 5 of an apparatus same as the above.
  • FIG. 1 relates to an example 1 of an exhaust gas flow acceleration device 10 according to the present invention.
  • 11 is an internal combustion engine
  • 12 is a combustion chamber
  • 13 is an exhaust pipe for discharging generated exhaust gas
  • 14 is exhaust gas purification.
  • FIG. 1 shows a catalyst device for the exhaust pipe 13.
  • the exhaust pipe 13 is equipped with a muffler 15, and the catalyst device 14, the exhaust pipe 13 including the muffler 15, and the like constitute an exhaust system.
  • the exhaust gas flow acceleration device 10 is installed at the exhaust pipe 13, that is, at the end of the exhaust system.
  • the exhaust gas flow acceleration device 10 includes a device main body 20 having a hollow cylindrical structure, and the device main body 20 is located upstream of the exhaust gas flow. Is connected to the end of the exhaust pipe 13 in an airtight manner at a connection end 16 provided at one end located at the end.
  • the acceleration device 10 of the present invention includes an apparatus main body 20 having the connection end 16 at one end as an exhaust gas inflow side for receiving an exhaust gas flow discharged from the end of the exhaust system, and the other end releasing the exhaust gas to the atmosphere. This is the exhaust gas outflow side.
  • the apparatus main body 20 has a cylindrical structure as a whole, and is formed in a cylindrical shape including a front surface portion 17 on the exhaust gas inflow side, an intermediate tubular portion 18 and a rear surface portion 19 on the exhaust gas outflow side. Yes.
  • connection end portion 16 is inserted into a connection hole 17a formed in the front surface portion 17 of the apparatus main body 20, and is joined by welding.
  • the connection hole 17a is provided substantially concentrically with the apparatus main body 20 (see FIG. 3A).
  • the joining means may be performed only by welding, and screw connection or a combination thereof is also possible.
  • Such an apparatus main body 20 is manufactured using an refractory metal by an arbitrary processing method such as a sheet metal processing method, a deep drawing method, a die casting method, or the like.
  • An exhaust gas flow accelerating cylinder 21 is provided inside the apparatus main body 20.
  • the exhaust gas flow accelerating cylinder 21 is provided to accelerate mainly the flow in the central portion of the exhaust gas flow that flows in from the exhaust gas inflow side, and is connected to the connection end 16. Therefore, it is provided substantially concentrically with the apparatus main body 20.
  • the exhaust gas flow accelerating cylinder 21 in the present invention is formed so as to have a relatively large volume in comparison with the conventional exhaust gas flow accelerator, and receives a larger amount of exhaust gas discharged from the exhaust system. It is configured to be able to.
  • the exhaust gas flow accelerating cylinder 21 includes a tapered cylindrical acceleration part 22 and an opening 24 provided in the cylinder part 23 in order to flow a flow other than mainly the central part of the exhaust gas flow outside the acceleration part. have.
  • the cylinder part 23 shown as Example 1 is substantially cylindrical.
  • the relatively large volume mentioned above is a volume related to the tapered cylindrical accelerating portion 22.
  • the volume of the tapered portion is increased by making the inclined angle with respect to the central axis more prominent. Can be increased.
  • the volume of the exhaust gas flow accelerating cylinder 21 is set, for example, approximately twice that of the second accelerating portion in the invention of Japanese Patent Application Laid-Open No. 2011-153574. According to the experiment, the optimal volume increase was about 100% increase compared to the conventional volume, but the effect started to appear at 20% increase and reached 150% even when it exceeded 150%. It is considered that good results can be obtained.
  • the tapered shape of the accelerating cylinder is set to a sharper angle with a sharp inclination angle with respect to the central axis.
  • the resistance tends to increase by setting the inclination angle to be more standing as in the present invention, but the speed of the compressible exhaust gas flow increases to the critical angle, and accordingly, the flow to the opening 24 is increased.
  • the detour flow increases. Therefore, by appropriately setting the critical angle, the acceleration in the acceleration unit 22 reaches the maximum without adversely affecting the acceleration of the exhaust gas flow, and the pressure drop generated downstream of the acceleration unit 22 is also maximized.
  • the critical angle C has conventionally been less than 30 degrees with respect to the central axis. However, in the case of the present invention, it has been confirmed that it is preferably in the range of 30 to 45 degrees.
  • the opening portion 24 is also provided in the cylindrical portion 23, but the opening portion 24 has an elongated shape in the central axis direction, and several openings are opened at equal intervals in the circumferential direction of the cylindrical portion 23.
  • the area of the openings 24 is also an important factor.
  • the area of the opening part 24 is preferably about several times the opening area of the nozzle part 25.
  • the area of the opening 24 is set to four times the opening area of the nozzle part 25, and good results are obtained.
  • the exhaust gas flow accelerating cylinder 21 is fixed to the cylindrical portion 18 by means of welding or the like at several locations using a support body 26 in the cylindrical portion 23.
  • the support 26 is illustrated in a substantially cross shape in FIG. 3 (FIG. 3A), and has sufficient strength to fix the exhaust gas flow accelerating cylinder 21 against external forces such as exhaust gas flow and running vibration. Functions as a support.
  • the space between the supports 26 is an exhaust gas suction port 27 through which an external exhaust gas flow passes, and communicates with the negative pressure space formed behind the acceleration unit 22 through the periphery thereof.
  • a tail pipe 28 is provided on the exhaust gas outflow side in order to release the exhaust gas flow accelerated by the exhaust gas acceleration cylinder 20 to the atmosphere.
  • the tail pipe 28 is provided in the pipe holding cylinder 29 so as to be slidable in the front-rear direction.
  • a mounting hole 19a is provided substantially concentrically in the rear surface portion 19, and a pipe holding cylinder 29 is inserted therein and joined by means such as welding.
  • the pipe connection cylinder 29 is arranged in a positional relationship such that the front end portion overlaps or does not overlap the rear end portion of the exhaust gas flow acceleration cylinder 21.
  • An adjusting mechanism 30 is provided to enable the tail pipe 28 to move in the front-rear direction with respect to the apparatus main body 20 and thereby to adjust the distance between the exhaust gas flow accelerating cylinder 21 and the tail pipe 28.
  • the adjusting mechanism 30 shown in FIG. 2 has an internal thread portion 31 formed in the pipe holding cylinder 29, an external thread body 32 screwed into the internal thread portion 31, and an adjustment hole provided at a plurality of positions as positioning portions in the front-rear direction of the tail pipe 28. 33. Accordingly, the position of the tail pipe 28 in the front-rear direction can be fixed by aligning the male screw body 32 with the female screw portion 32 and inserting the tip into the adjustment hole 33.
  • the exhaust gas flow E discharged from the end of the exhaust system flows into the exhaust gas flow accelerating cylinder 21 and is mainly in the central portion of the exhaust gas flow.
  • the flow E1 passes through the tapered cylindrical acceleration portion 22 and is accelerated to become a high-speed flow.
  • a strong negative pressure region V is formed in the region indicated by the umbilical line in FIG. 4 between the downstream of the nozzle portion 25 and the surrounding tail pipe 28.
  • the flow E2 other than the central portion mainly flows out of the accelerating portion 22, but this flow is sucked into the strong negative pressure region V to become the suction flow E3, and at a high speed at the central portion.
  • the flow E1 merges and is released into the atmosphere as E4.
  • the exhaust gas flow acceleration device 10 has a configuration in which the adjustment mechanism 30 is operated so that the tail pipe 28 can be moved in the front-rear direction with respect to the device main body 20. Therefore, by adjusting the distance between the exhaust gas flow acceleration cylinder 21 and the tail pipe 28, the range of the negative pressure region V can be changed, and this change greatly affects the acceleration of the exhaust gas flow. .
  • the position of the chain double-dashed line shown in FIG. 4 indicates a state in which the tail pipe 28 is most retracted. In this state, the negative pressure region V is expanded to the maximum, generating a stronger negative pressure and The maximum acceleration is set.
  • Example 2 of the exhaust gas flow accelerating device 10 will be described with reference to FIG. Since the basic configuration of the apparatus 10 of Example 2 is not substantially different from that of the apparatus of Example 1, reference numerals are used and detailed description thereof is omitted. Unlike the case of Example 1 in which the cross-sectional area continuously changes, the acceleration device 10 of Example 2 changes the cross-sectional area stepwise (discontinuously). It consists of a two-stage change in the cross-sectional area of the nozzle portion 25 with the smallest area. In addition, the opening 24 is provided between the connection end 16 and the cylindrical portion 23 having the maximum area in order to flow the exhaust gas flow mainly outside the central portion to the outside of the acceleration portion.
  • Example 2 In the case of the apparatus 10 of Example 2, when the exhaust gas flow discharged from the connection end portion 16 flows into the cylindrical portion 23 having the largest cross-sectional area, the flow mainly at the center of the exhaust gas flow is accelerated at a stroke in the nozzle portion 25. Then, the flow other than the central portion escapes from the opening 24 on the front side of the cylindrical portion 23 having the largest area, and is sucked into the strong negative pressure region V and accelerated to become a high-speed flow at the center downstream of the nozzle portion 25. Merge with the flow of the part. Also in Example 2, the distance from the tail pipe 28 can be adjusted, and the range of the negative pressure region V can be changed. That is, the adjustment of the tail pipe position and the degree of acceleration of the exhaust gas flow, and hence the strength of the generated negative pressure, are the same as in Example 1.
  • FIG. 6 shows Example 3 of the exhaust gas flow accelerating device 10 according to the present invention, which is also equivalent to the device of Example 1 in terms of basic configuration. That is, the apparatus main body 20 having the connection end portion 16, the front surface portion 17, the cylindrical portion 18, and the rear surface portion 19, and the exhaust gas flow acceleration cylinder 21 having the acceleration portion 22, the cylinder portion 23, the opening portion 24, and the nozzle portion 25. And a configuration in which the tail pipe 28 is provided on the pipe holding cylinder 29 so as to be slidable in the front-rear direction. Accordingly, the adjustment mechanism 40 will be described without reiterating the detailed description by using the description of Example 1 for these.
  • the cylinder part 23 provided with the acceleration part 22 is formed by cutting using an NC lathe or the like.
  • the cylindrical portion 23 is attached to the support body 26 using the bolts 23b, and therefore can be attached and detached.
  • the acceleration part 22 can be replaced
  • the cylindrical portion 23 is cut out from the raw material, it is easy to select the length in the front-rear direction, and a more appropriate response can be made at the manufacturing stage.
  • a hood 16a is provided so as to surround the connection end portion 16, and a flow other than the central portion of the inflowing exhaust gas flow is configured not to diffuse excessively to the outer periphery. Therefore, the flow other than the central portion quickly becomes a suction flow into the negative pressure region V, and merges with the flow in the central portion downstream of the nozzle portion 25. Further, as in the case of Example 1, it is possible to adjust the degree of acceleration of the exhaust gas flow, and hence the strength of the generated negative pressure, by adjusting the tail pipe position.
  • Example 4 of the exhaust gas flow accelerating device 10 according to the present invention will be described with reference to FIG.
  • the apparatus 10 of Example 4 is not substantially different from the apparatus of Example 1 with respect to the basic configuration. Therefore, the apparatus main body 20 having the connection end portion 16, the front surface portion 17, the cylindrical portion 18, and the rear surface portion 19, and the exhaust gas flow acceleration cylinder 21 having the acceleration portion 22, the cylindrical portion 23, the opening portion 24, and the nozzle portion 25. And a configuration in which the tail pipe 28 is provided on the pipe holding cylinder 29 so as to be slidable in the front-rear direction. Therefore, the description of Example 1 is used for these, and the detailed description is not repeated, and the adjustment mechanism 40 will be mainly described.
  • the tail pipe 28 is slidably attached to the apparatus main body 20 and is automatically movably provided, and the strong negative pressure generated in the exhaust gas flow accelerating cylinder 21 is provided. It has the negative pressure sensitive part 34 comprised so that it can move according to this. The negative pressure sensitive part 34 is sucked by the negative pressure generated downstream of the exhaust gas flow accelerating cylinder 21, and the exhaust gas flow flowing outside the exhaust gas flow accelerating cylinder 21 collides with the negative pressure sensitive part 34.
  • a ring-shaped pressure receiving portion is provided at the front end portion of the tail pipe 28.
  • the negative pressure sensing part 34 composed of a ring-shaped pressure receiving part is in a position in contact with the acceleration part 22 of the exhaust gas flow acceleration cylinder 21 when the internal combustion engine 11 is not operated. Therefore, an extension 35 is provided in front of the tail pipe 28, and a plurality of openings 36 for suctioning negative pressure are formed there.
  • Reference numeral 37 denotes urging means for urging the tail pipe 28 to the initial position, one end of which is connected to the apparatus main body 20 side and the other end is connected to the tail pipe 28 side.
  • the cases 37a and 37b are combined with a so-called telescopic (slidable back and forth), and have a built-in compression spring.
  • Reference numerals 38 and 39 denote attachment portions of the urging means 37.
  • the said pressure receiving part 34 has the clearance gap which is slidable between the internal peripheral surfaces of the cylindrical part 18 (refer FIG. 3B).
  • the flow E1 in the central portion of the exhaust gas flow passes through the tapered cylindrical acceleration portion 22 and is accelerated and accelerated. It becomes a flow.
  • a strong negative pressure region V is formed in the region shown by hatching in FIG. 4 between the downstream of the nozzle portion 25 and the surrounding tail pipe 28.
  • the flow E2 other than the central part flows out of the acceleration part 22.
  • the strong negative pressure generated by the flow at the center acts on the rear surface of the ring-shaped negative pressure sensing portion 34 to pull the tail pipe 28 rearward, and at the same time, the exhaust gas flow flowing around the outer periphery of the exhaust gas flow accelerating cylinder 21 Will hit and push backwards.
  • the tail pipe 28 moves rearward, the space between the exhaust gas flow accelerating cylinder 21 and the tail pipe 28 is opened, and a flow from the outer periphery toward the center is generated.
  • This flow is sucked into the strong negative pressure region V to become a suction flow, and is merged with the flow in the central portion at a high speed and released into the atmosphere as in the case of Example 1.
  • the back and forth movement of the tail pipe 28 is automatically changed in accordance with the pressure change, speed change, etc. generated in the exhaust gas flow, so that the optimum exhaust gas flow acceleration according to the operating state of the internal combustion engine can be obtained.
  • Example 5 of the exhaust gas flow acceleration device 10 will be described with reference to FIG.
  • the basic configuration of the apparatus 10 of Example 5 is not substantially different from the apparatuses of Examples 1 to 4.
  • the apparatus 10 of Example 5 includes a sensor 41 installed at an arbitrary position of the exhaust pipe from the combustion chamber exhaust port, and a control unit 42 that outputs a movement amount according to the sensor signal.
  • the electronic control device includes a motor 43 that operates according to the output and a moving mechanism 44 that moves the tail pipe 28 by the motor 43. As the state of the exhaust gas flow, speed, pressure, flow rate, temperature, and the like are to be detected.
  • the flow rate and flow rate of the exhaust gas flow that varies depending on the load and the rotational speed during operation of the internal combustion engine are detected by the sensor 41, and the control unit 42 performs calculation using the sensor signal as one parameter.
  • the calculation result is output to a motor 43 such as a servo motor, and the tail pipe 28 is moved back and forth by the moving mechanism 44 to adjust the acceleration rate of the exhaust gas flow.
  • the acceleration degree of the exhaust gas flow can be appropriately adjusted in accordance with the operating environment of the internal combustion engine, the exhaust amount, and the like.
  • the exhaust gas flow accelerating device according to the present invention can be applied to an internal combustion engine for a vehicle represented by the above-described gasoline engine or diesel engine.
  • the present invention can be applied to any internal combustion engine in which the exhaust gas generated by the combustion of the fuel works as a thermodynamic fluid. For example, it can also be applied to a gas turbine engine or the like.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Characterised By The Charging Evacuation (AREA)

Abstract

La présente invention vise à régler de manière appropriée le niveau d'accélération d'un flux de gaz d'échappement en fonction de l'environnement de fonctionnement, du niveau d'échappement, etc. d'un moteur à combustion interne. La présente invention est caractérisée en ce qu'elle comprend : un corps (20) de dispositif ayant une structure globalement tubulaire, une extrémité de ce dernier servant de côté d'entrée de gaz d'échappement destiné à recevoir un flux de gaz d'échappement évacué depuis une extrémité d'un système d'échappement, et l'autre extrémité servant de côté de sortie de gaz d'échappement destiné à évacuer le gaz d'échappement dans l'atmosphère ; un tube (21) d'accélération de flux de gaz d'échappement comprenant une partie accélération tubulaire destinée à accélérer principalement le flux central d'un flux de gaz d'échappement s'écoulant dans le côté d'entrée de gaz d'échappement, et une ouverture conçue pour canaliser, vers l'extérieur de la partie accélération, principalement la partie du flux de gaz d'échappement autre que le flux central ; une conduite (28) de queue disposée sur le côté de sortie de gaz d'échappement pour décharger dans l'atmosphère un flux de gaz d'échappement accéléré par le tube d'accélération de flux de gaz d'échappement ; et un mécanisme (30) de réglage apte à déplacer la conduite de queue vers l'avant ou vers l'arrière par rapport au corps de dispositif, ce qui permet de régler l'intervalle entre le tube d'accélération du flux de gaz d'échappement et la conduite de queue.
PCT/JP2017/022804 2016-06-22 2017-06-21 Accélérateur de flux de gaz d'échappement WO2017221962A1 (fr)

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JP2016-123727 2016-06-22
JP2016123727A JP6723088B2 (ja) 2016-06-22 2016-06-22 排気ガス流の加速装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019186872A1 (fr) * 2018-03-29 2019-10-03 新田 栄一 Dispositif de force d'écoulement d'aspiration de gaz d'échappement, automobile équipée d'un dispositif de force d'écoulement d'aspiration de gaz d'échappement, et motocyclette équipée d'un dispositif de force d'écoulement d'aspiration de gaz d'échappement
JP6979238B1 (ja) 2020-06-17 2021-12-08 株式会社國商 内燃機関の排気促進装置及び排気系改良方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969895A (en) * 1974-06-24 1976-07-20 John Krizman Power control valve attachment for two cycle motorcycle type engine exhaust systems
JPH10331631A (ja) * 1997-06-03 1998-12-15 Tsunoda Jierawan 掃気促進装置
JP2001234742A (ja) * 2000-02-24 2001-08-31 Aihou:Kk 排気促進装置
JP2011153574A (ja) * 2010-01-27 2011-08-11 Takimoto Kenji 排気ガス流の加速装置
JP2016070068A (ja) * 2014-09-26 2016-05-09 マツダ株式会社 多気筒エンジンの排気装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56175510U (fr) * 1980-05-29 1981-12-24
CN102686844B (zh) * 2009-12-11 2014-08-27 雅马哈发动机株式会社 发动机及包括该发动机的车辆和船舶

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969895A (en) * 1974-06-24 1976-07-20 John Krizman Power control valve attachment for two cycle motorcycle type engine exhaust systems
JPH10331631A (ja) * 1997-06-03 1998-12-15 Tsunoda Jierawan 掃気促進装置
JP2001234742A (ja) * 2000-02-24 2001-08-31 Aihou:Kk 排気促進装置
JP2011153574A (ja) * 2010-01-27 2011-08-11 Takimoto Kenji 排気ガス流の加速装置
JP2016070068A (ja) * 2014-09-26 2016-05-09 マツダ株式会社 多気筒エンジンの排気装置

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