US20100140014A1 - Flow Passage Control Valve for Muffler - Google Patents
Flow Passage Control Valve for Muffler Download PDFInfo
- Publication number
- US20100140014A1 US20100140014A1 US12/574,342 US57434209A US2010140014A1 US 20100140014 A1 US20100140014 A1 US 20100140014A1 US 57434209 A US57434209 A US 57434209A US 2010140014 A1 US2010140014 A1 US 2010140014A1
- Authority
- US
- United States
- Prior art keywords
- valve body
- opening
- flow passage
- valve
- passage control
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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Classifications
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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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
-
- 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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
-
- 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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
-
- 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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
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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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/12—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side weight-loaded
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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
- F01N2290/00—Movable parts or members in exhaust systems for other than for control purposes
- F01N2290/08—Movable parts or members in exhaust systems for other than for control purposes with oscillating or vibrating movement
- F01N2290/10—Movable parts or members in exhaust systems for other than for control purposes with oscillating or vibrating movement actuated by pressure of exhaust gases, e.g. exhaust pulses
-
- 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
- F01N2490/00—Structure, disposition or shape of gas-chambers
- F01N2490/02—Two or more expansion chambers in series connected by means of tubes
- F01N2490/06—Two or more expansion chambers in series connected by means of tubes the gases flowing longitudinally from inlet to outlet in opposite directions
Abstract
A flow passage control valve for a muffler may include an opening formed through a guide pipe, which forms an exhaust gas channel in the muffler, to form another exhaust gas channel, and a valve body adjusts an open amount of the opening by using a difference between an exhaust gas pressure exerted through the opening and a weight of the valve body.
Description
- The present application claims priority to Korean Application Serial Number 10-2008-0122517, filed on Dec. 4, 2008, the entire contents of which is incorporated herein for all purposes by this reference.
- 1. Field of the Invention
- The present invention relates to a muffler of a vehicle, particularly a flow passage control valve for a muffler that uses the gravity to change an exhaust gas flow passage inside the muffler.
- 2. Description of Related Art
- Mufflers of vehicles in the related art have structures including a plurality of chambers that is formed by disposing one or more baffles in a muffler housing sealed to have a predetermined volume, an exhaust gas intake pipe that allows exhaust gas to flow inside the muffler housing, and an exhaust gas discharge pipe that allows the exhaust gas to flow outside from the muffler housing such that the exhaust gas that has flowed in the muffler housing through the exhaust gas intake pipe flows outside with the pressure and noise reduced from the mufflers through the exhaust gas discharge pipe while flowing through a predetermined flow channel formed inside the muffler housing.
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FIG. 1 shows an example of a muffler according to the related art, in which an exhaustgas intake pipe 2 that allows exhaust gas discharged outside from the engine is connected to the front of amuffler housing 1, which has a substantially elliptical box shape, to be communicated with the inside ofhousing 1 and an exhaust gas discharge pipe 3 that allows the exhaust gas with the pressure and noise reduced while flowing through a predetermined channel inside the housing to flow outside the housing is connected to the rear portion ofhousing 1 to protrude outside. - Further, a plurality of
baffles muffler housing 1 such that the inside of the housing is divided into a plurality of chambers, exhaustgas intake pipe 2 passes throughfirst baffle 4 a at the front portion, and aguide pipe 5 that guides exhaust gas flowing inside through exhaustgas intake pipe 2 to exhaust gas discharge pipe 3 is disposed throughsecond baffle 4 b at the rear portion. - Further,
first baffle 4 a is equipped with a flow passage control valve 6 that opens/closes an exhaust gas flow channel in accordance with the driving velocity of the engine and flow passage control valve 6 opens when the engine is driven at a high speed, such that the flow of exhaust gas through the flow passage control valve is improved and the discharge pressure and noise are reduced, thereby improving the engine power. - Flow passage control valve 6 has a
valve body 6 a that opens/closes a circular exhaust gas channel formed throughfirst baffle 4 a and asupport spring 6 b wound around a valve shaft ofvalve body 6 a to elastically supportvalve body 6 a. - When a spring type flow passage control vale having the above configuration in the related art is used, since the valve body is supported by the spring, the exhaust gas channel formed through the first baffle is opened in linear proportion to the exhaust gas pressure exerted in the valve body, in which the exhaust gas channel should be more opened to improve the engine power; however, the amount of opening of the variable valve is limited by the support force of the spring, which linearly increases, such that it is difficult to improve the engine power.
- Further, the pulsation pressure of the exhaust gas is completely transmitted to the valve body of the flow passage control valve, such that the valve body opens the exhaust gas channel while continuously chattering or vibrating. Accordingly, it is difficult to accurately control the gas channel and it is required to use a special steel spring having high strength because the support spring that supports the valve body is exposed to the high-temperature exhaust gas, such that the cost of materials increases.
- The information disclosed in this Background of the Invention section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
- Various aspects of the present invention are directed to provide a flow passage control valve for a muffler that can improve the effect of noise reduction when the engine is driven at a low speed and improve the engine power when the engine is driven at a high speed by changing the exhaust gas channel, using the discharge pressure of exhaust gas and the gravity exerted against the discharge force.
- In an aspect of the present invention, a flow passage control valve for a muffler may include an opening formed through a guide pipe, which forms an exhaust gas channel in the muffler, to form another exhaust gas channel, and a valve body may adjust an open amount of the opening by using a difference between an exhaust gas pressure exerted through the opening and a weight of the valve body, wherein at least a weight block that increase the weight of the valve body are additionally attached to the valve body.
- The valve body may be pivotably connected to a valve housing, which is attached to the guide pipe, by a hinge shaft, wherein the valve body is formed in an arc shape and has one end pivotably connected to the hinge shaft, and the at least a weight block are fixedly attached to the other end of the valve body.
- A closing-adjusting stopper that limits a closing stroke of the valve body when the valve body pivots in a direction of closing the opening may be provided in the valve housing.
- An opening stopper that limits an opening stroke of the valve body when the valve body pivots in a direction of opening the opening may be provided in the valve housing and a stopper groove that selectively interacts with the opening stopper is formed at the valve housing.
- In another aspect of the present invention, a flow passage control valve for a muffler, may include a muffler housing including a front chamber, a center chamber, and a rear chamber therein; an exhaust gas intake pipe passing through the first, center and rear chambers and fluid-connecting the first and rear chambers to receive an exhaust gas discharged from an engine; an exhaust gas discharge pipe passing through the center and rear chambers and fluid-connecting the center chamber and the outside to discharge the exhaust gas to the outside of the muffler housing; a guide pipe passing through the first, center and rear chambers and fluid-connecting the rear and front chambers, wherein the guide pipe includes an opening which is selectively opened to the center chamber by a valve body in accordance with a difference between an exhaust gas pressure exerted through the opening and a weight of the valve body.
- The valve body may be formed in an arc shape corresponding to an outer circumference of the guide pipe.
- The flow passage control valve may further include at least a weight block attached to the valve body to increase the weight of the valve body.
- The valve body may include a flange formed in an arc shape corresponding to an outer circumference of the guide pipe to selectively cover the opening and one of the at least a weight block is fixed to one end portion of the flange and the other of the at least a weight block may be fixed to the other end portion of the flange, while the one end portion and the other end portion of the flange are aligned along a longitudinal direction of the guide pipe.
- The valve body may be pivotably connected to a valve housing by a hinge shaft and the valve housing is fixed to the guide pipe.
- A distance between the hinge shaft and the opening may be shorter than a distance between the hinge shaft and a weight center of the at least a weight block.
- A closing-adjusting stopper that limits a closing stroke of the valve body when the valve body pivots in a direction of closing the opening may be provided in the valve housing, wherein the closing-adjusting stopper is disposed between the hinge shaft and the at least a weight block.
- An opening stopper that limits an opening stroke of the valve body when the valve body pivots in a direction of opening the opening may be provided at one end portion of the valve body.
- A stopper groove may be formed at the valve housing to selectively interact with the opening stopper.
- The opening stopper may be disposed opposite to the closing-adjusting stopper with respect to the hinge shaft.
- According to various aspect of the flow passage control valve of the present invention, since the cross-sectional area of the exhaust gas channel and the open amount of the valve are small when the engine is driven at a low speed, in which the influence of booming noise is large, the exhaust gas discharge noise is reduced and exhaust noise is effectively reduced. Further, when the engine is driven at a middle speed or a high speed, the cross-sectional area of the exhaust gas channel and the open amount of the valve increase in proportion to the driving speed of the engine and the engine power is effectively improved, such that it is possible to reduce the cost of materials because it is not required to mount a spring having large strength to support the valve, and accurately control the exhaust gas channel because less pulsation pressure of the exhaust gas is applied.
- The methods and apparatuses of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description of the Invention, which together serve to explain certain principles of the present invention.
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FIG. 1 is a perspective view showing the inside of a muffler equipped with a variable valve according to an exemplary embodiment of the related art. -
FIG. 2 is a projected perspective view of a muffler equipped with a flow passage control valve according to an exemplary embodiment of the present invention. -
FIGS. 3 to 5 are enlarged perspective views of the flow passage control valve according to an exemplary embodiment of the present invention. -
FIGS. 6 and 7 are views illustrating the operation of the flow passage control valve according to an exemplary embodiment of the present invention. -
FIGS. 8 and 9 are graphs comparing the flow passage control valve of an exemplary embodiment of the present invention with a flow passage control valve of the related art about engine speed to valve position. - It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment.
- In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing.
- Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is/are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.
- Referring to
FIG. 2 , the openings of both sides of amuffler housing 11 having a substantially elliptical box shape are covered by afront cap 12 a and arear cap 12 b to seal the inside of themuffler housing 11. Twobaffles muffler housing 11 inside the sealed space of the muffler housing, such that afront chamber 14 a, acenter chamber 14 b, and arear chamber 14 c are formed betweenfront cap 12 a and the first baffle, between the first and second baffles, and between the second baffle andrear cap 12 b, respectively. - A plurality of holes 13 aa is formed through
first baffle 13 a, such thatfront chamber 14 a andcenter chamber 14 b are communicated with each other by holes 13 aa. - An exhaust
gas intake pipe 15 that allows exhaust gas discharged from the engine to flow inside themuffler housing 11 is inserted from the front portion ofmuffler housing 11 and sequentially passes through first andsecond baffles rear chamber 14 c, and a plurality ofholes 15 a is formed at the portion, which is positioned infront chamber 14 a, of exhaustgas intake pipe 15 such that exhaustgas intake pipe 15 is communicated withfront chamber 14 a. - Further, an exhaust
gas discharge pipe 16 that allows the exhaust gas to flow outside the muffler housing passes throughsecond baffle 13 b andrear cap 12 b such that the exhaust gas incenter chamber 14 b is discharged outside the muffler housing. - A
guide pipe 17 passing through first andsecond baffles opening 17 a that allows exhaust gas to flow into the center chamber is formed at the portion, which positioned in the center chamber, of the guide pipe, and the open amount of opening 17 a is adjusted by a flowpassage control valve 18 according to an exemplary embodiment of the present invention. - Flow
passage control valve 18, as shown in detail inFIGS. 3 to 5 , has avalve housing 18 a attached on the outer circumference ofguide pipe 17 and avalve body 18 c pivotably disposed invalve housing 18 a by ahinge shaft 18 b and formed in an arc shape to adjust the open amount of opening 17 a ofguide pipe 17. - Further,
valve body 18 c hasflanges 18 ca, which axially extend, at the left and right edges and arc-shaped weight blocks 18 d are integrally fixed toflanges 18 a, such that the weight of valve body increases. - Further, a closing-adjusting stopper 18 e is mounted in the valve housing, such as a bolt, to adjust the closing stroke of
valve body 18 c whenvalve body 18 c pivots by the weight in the direction of closing the opening, such that the closing motion ofvalve body 18 c is limited, when the lower end ofvalve body 18 c is placed on closing-adjusting stopper 18 e. - Further, an opening stopper 18 cd integrally protrudes from
valve body 18 c to limit the opening stroke whenvalve body 18 c pivots upward in the direction of opening the opening by the exhaust gas pressure exerted through the opening and astopper groove 18 aa where the opening stopper is inserted and locked is formed by cutting off the valve housing to the inside, such that the opening motion of the valve body is limited when openingstopper 18 cd is inserted and locked instopper groove 18 aa. - Further,
bushes 18 f are fitted on both ends ofhinge shaft 18 b to reduce the operational noise, whenvalve body 18 c pivots aroundhinge shaft 18 b. -
FIGS. 6 and 7 are side views illustrating the operational state of flowpassage control valve 16 according to an exemplary embodiment of the present invention, in accordance with the driving speed of the engine. The flow passage control valve according to an exemplary embodiment of the present invention pivots downward by its own weight and the weight of the weight blocks unless external force applied such thatvalve body 18 c keeps closing opening 17 a ofguide pipe 17. - Therefore, the exhaust gas that has flowed in the rear chamber flows into the front chamber through the guide pipe, thereafter flows into the center chamber through the holes of the first baffle, and then is discharged outside the muffler through the exhaust gas discharge pipe.
- When the engine is driven at a low speed in the above configuration, the amount of exhaust gas discharged from the engine is small and a portion of the exhaust gas that has flowed in the muffler is applied to
valve body 18 c as indicated by arrows, in which large moment is needed to open theopening 17 a by pivoting the valve body in the opening direction aroundhinge shaft 18 b as shown inFIG. 6 . - That is, the exhaust gas pressure exerted in the valve body is positioned ahead of the center of weight of the entire valve body, such that the valve body is opened when more exhaust gas pressure is applied. However, since the exhaust gas pressure is low when the engine is driven at a low speed, the variable flow passage valve effectively reduce the booming noise when the engine is driven at a low speed by maintaining the position almost closing the opening of the guide pipe.
- On the other hand, when the engine is driven at a high speed, as shown in
FIG. 7 , the pressure applied to the valve body by the exhaust gas gradually increases and the valve body pivots in the direction of opening the opening by the exhaust gas pressure, in which the point of action of the resultant force of the exhaust gas exerted in the valve body from thehinge shaft 18 b is substantially the same as the center of weight of the valve body, such that relatively small exhaust gas pressure is needed to maintain the open state of the valve body and the cross-sectional area of the exhaust gas channel increases while the opening amount of the opening that is opened by the valve body increases. Accordingly, a portion of exhaust gas flowing through the guide pipe directly flows inside the center chamber through the opening of the guide pipe and is then directly discharged outside the muffler through the exhaust discharge pipe. Therefore, the exhaust gas smoothly flows, such that the discharge pressure of the exhaust gas is reduced and the engine power is improved. -
FIGS. 8 and 9 show graphs each comparing the opening torques to the valve positions and the valve positions to the driving speeds of the engine in a spring type variable flow passage valve of the related art and a gravity type variable flow passage valve of the present invention. In the variable flow passage valve of the related art, as the valve is opened, the support force of the spring that supports the valve body increases, such that large exhaust gas pressure that is in linear proportion to the open amount of the valve is needed, whereas exhaust gas pressure that is substantially in inverse proportion to the open amount of the valve is needed or the exhaust gas pressure does not substantially change in the present invention. Accordingly, as the driving speed of the engine increases, the open amount of the variable flow passage valve increases as compared with the related art, thereby improving the engine power. - For convenience in explanation and accurate definition in the appended claims, the terms “front” and “rear” are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures.
- The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents.
Claims (17)
1. A flow passage control valve for a muffler wherein an opening is formed through a guide pipe, which forms an exhaust gas channel in the muffler, to form another exhaust gas channel, and a valve body adjusts an open amount of the opening by using a difference between an exhaust gas pressure exerted through the opening and a weight of the valve body.
2. The flow passage control valve as defined in claim 1 , wherein at least a weight block that increase the weight of the valve body are additionally attached to the valve body.
3. The flow passage control valve as defined in claim 2 , wherein the valve body is pivotably connected to a valve housing, which is attached to the guide pipe, by a hinge shaft.
4. The flow passage control valve as defined in claim 3 , wherein the valve body is formed in an arc shape and has one end pivotably connected to the hinge shaft, and the at least a weight block are fixedly attached to the other end of the valve body.
5. The flow passage control valve as defined in claim 4 , wherein a closing-adjusting stopper that limits a closing stroke of the valve body when the valve body pivots in a direction of closing the opening is provided in the valve housing.
6. The flow passage control valve as defined in claim 4 , wherein an opening stopper that limits an opening stroke of the valve body when the valve body pivots in a direction of opening the opening is provided in the valve housing and a stopper groove that selectively interacts with the opening stopper is formed at the valve housing.
7. A flow passage control valve for a muffler, comprising:
a muffler housing including a front chamber, a center chamber, and a rear chamber therein;
an exhaust gas intake pipe passing through the first, center and rear chambers and fluid-connecting the first and rear chambers to receive an exhaust gas discharged from an engine;
an exhaust gas discharge pipe passing through the center and rear chambers and fluid-connecting the center chamber and the outside to discharge the exhaust gas to the outside of the muffler housing;
a guide pipe passing through the first, center and rear chambers and fluid-connecting the rear and front chambers,
wherein the guide pipe includes an opening which is selectively opened to the center chamber by a valve body in accordance with a difference between an exhaust gas pressure exerted through the opening and a weight of the valve body.
8. The flow passage control valve as defined in claim 7 , wherein the valve body is formed in an arc shape corresponding to an outer circumference of the guide pipe.
9. The flow passage control valve as defined in claim 7 , further including at least a weight block attached to the valve body to increase the weight of the valve body.
10. The flow passage control valve as defined in claim 9 , wherein the valve body includes a flange formed in an arc shape corresponding to an outer circumference of the guide pipe to selectively cover the opening and one of the at least a weight block is fixed to one end portion of the flange and the other of the at least a weight block is fixed to the other end portion of the flange, the one end portion and the other end portion of the flange being aligned along a longitudinal direction of the guide pipe.
11. The flow passage control valve as defined in claim 7 , wherein the valve body is pivotably connected to a valve housing by a hinge shaft and the valve housing is fixed to the guide pipe.
12. The flow passage control valve as defined in claim 11 , wherein a distance between the hinge shaft and the opening is shorter than a distance between the hinge shaft and a weight center of the at least a weight block.
13. The flow passage control valve as defined in claim 11 , wherein a closing-adjusting stopper that limits a closing stroke of the valve body when the valve body pivots in a direction of closing the opening is provided in the valve housing.
14. The flow passage control valve as defined in claim 13 , wherein the closing-adjusting stopper is disposed between the hinge shaft and the at least a weight block.
15. The flow passage control valve as defined in claim 11 , wherein an opening stopper that limits an opening stroke of the valve body when the valve body pivots in a direction of opening the opening is provided at one end portion of the valve body.
16. The flow passage control valve as defined in claim 15 , wherein a stopper groove is formed at the valve housing to selectively interact with the opening stopper.
17. The flow passage control valve as defined in claim 15 , wherein the opening stopper is disposed opposite to the closing-adjusting stopper with respect to the hinge shaft.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020080122517A KR20100064090A (en) | 2008-12-04 | 2008-12-04 | Flow passage control valve for muffler |
KR10-2008-0122517 | 2008-12-04 |
Publications (1)
Publication Number | Publication Date |
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US20100140014A1 true US20100140014A1 (en) | 2010-06-10 |
Family
ID=42229840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/574,342 Abandoned US20100140014A1 (en) | 2008-12-04 | 2009-10-06 | Flow Passage Control Valve for Muffler |
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US (1) | US20100140014A1 (en) |
KR (1) | KR20100064090A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2486576A (en) * | 2010-12-17 | 2012-06-20 | Vetco Gray Scandinavia As | Pressure equalising valve |
CN103256110A (en) * | 2012-02-16 | 2013-08-21 | 现代自动车株式会社 | Horizontally installed muffler having sporty tone |
US20160053664A1 (en) * | 2013-04-10 | 2016-02-25 | Toyota Jidosha Kabushiki Kaisha | Muffler and its corresponding manufacturing method |
US20170122155A1 (en) * | 2015-11-02 | 2017-05-04 | Roush Enterprises, Inc. | Muffler with Selected Exhaust Pathways |
US11002165B2 (en) | 2017-04-04 | 2021-05-11 | Bombardier Recreational Products Inc. | Muffler for an internal combustion engine |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101935523B1 (en) * | 2016-05-10 | 2019-01-08 | 주식회사 코웰 | Variable type exhaust valve device for muffler |
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US20080116005A1 (en) * | 2006-11-20 | 2008-05-22 | Matte Francois | Exhaust gas diffuser |
US20090229912A1 (en) * | 2006-05-18 | 2009-09-17 | Toyota Jidosha Kabushiki Kaisha | Muffler |
US7712578B2 (en) * | 2007-12-07 | 2010-05-11 | Hyundai Motor Company | Muffler of vehicle and exhaust apparatus using the same |
-
2008
- 2008-12-04 KR KR1020080122517A patent/KR20100064090A/en not_active Application Discontinuation
-
2009
- 2009-10-06 US US12/574,342 patent/US20100140014A1/en not_active Abandoned
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2486576A (en) * | 2010-12-17 | 2012-06-20 | Vetco Gray Scandinavia As | Pressure equalising valve |
US8863844B2 (en) | 2010-12-17 | 2014-10-21 | Vetco Gray Scandinavia As | Subsea arrangement |
CN103256110A (en) * | 2012-02-16 | 2013-08-21 | 现代自动车株式会社 | Horizontally installed muffler having sporty tone |
US20130213734A1 (en) * | 2012-02-16 | 2013-08-22 | Hyundai Motor Company | Horizontally installed muffler having sporty tone |
US8579077B2 (en) * | 2012-02-16 | 2013-11-12 | Hyundai Motor Company | Horizontally installed muffler having sporty tone |
US20160053664A1 (en) * | 2013-04-10 | 2016-02-25 | Toyota Jidosha Kabushiki Kaisha | Muffler and its corresponding manufacturing method |
US9719404B2 (en) * | 2013-04-10 | 2017-08-01 | Toyota Jidosha Kabushiki Kaisha | Muffler and its corresponding manufacturing method |
US20170122155A1 (en) * | 2015-11-02 | 2017-05-04 | Roush Enterprises, Inc. | Muffler with Selected Exhaust Pathways |
US10082058B2 (en) * | 2015-11-02 | 2018-09-25 | Roush Enterprises, Inc. | Muffler with selected exhaust pathways |
US10995640B2 (en) * | 2015-11-02 | 2021-05-04 | Roush Enterprises, Inc. | Muffler with selected exhaust pathways |
US11002165B2 (en) | 2017-04-04 | 2021-05-11 | Bombardier Recreational Products Inc. | Muffler for an internal combustion engine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HYUNDAI MOTOR COMPANY,KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HAN, HAKSON;REEL/FRAME:023333/0463 Effective date: 20090922 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |