CN101203663B - Muffler of general-purpose engine - Google Patents
Muffler of general-purpose engine Download PDFInfo
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- CN101203663B CN101203663B CN200680022435XA CN200680022435A CN101203663B CN 101203663 B CN101203663 B CN 101203663B CN 200680022435X A CN200680022435X A CN 200680022435XA CN 200680022435 A CN200680022435 A CN 200680022435A CN 101203663 B CN101203663 B CN 101203663B
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- outlet pipe
- suction tude
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Abstract
A muffler unit for a general-purpose engine includes a muffler (40) having a maze of sound-deadening chambers (101, 102, 103) defined therein and an inlet pipe (85) disposed inside the muffler. The inlet pipe has an open end (106) connected to an exhaust port of the engine via an exhaust pipe (43), a closed end (107) opposite to the open end, and perforations (108) provided near the open end and connecting an internal space of the inlet pipe and a first sound-deadening chamber (101). The closed end of the inlet pipe is exposed to the outside air, so that exhaust gasses are cooled when the gasses impinge on the closed end of the inlet pipe.
Description
Technical field
The present invention relates to a kind of muffler that is used for general purpose engine, relate more specifically to a kind of like this muffler, this muffler comprises the silencing apparatus that links to each other with exhaust opening of engine by outlet pipe.
Background technique
The known muffler that is used for general purpose engine is for example as disclosed muffler among Japanese Utility Model communique (JP-UM-A) No.2-99214, Japanese patent gazette (JP-A) No.2003-097289 and Japanese Utility Model communique (JP-UM-A) No.59-194521.
Figure 17 of the present invention shows disclosed muffler in JP-UM-A 2-99214.As shown in the drawing, disclosed muffler comprises silencing apparatus 300, and this silencing apparatus has pair of shells parts 301 and 302, and these two housing parts link together by the partition wall 303 that is arranged between them.In silencing apparatus 300, on the relative both sides of partition wall 303, be limited with two noise reduction chambers 304,305.Housing parts 304 has suction port 308, the first chambers 304 and is communicated with the relief opening 307 of general purpose engine 306 by this suction port 308.Partition wall 303 has: facing to the dome-like recessed portion 311 of suction port 308; And hole, a plurality of pinnacle (lancet hole) 312, the first noise reduction chambers 304 and the second noise reduction chamber 305 communicate with each other by these holes, pinnacle.The second noise reduction chamber 305 leads to outside air by tail pipe 109.
By the muffler of such layout, when exhaust is transmitted with the route that passes first chamber 304 and second chamber 305 via hole, pinnacle 312, thereby the speed of gas and pressure have reduced sound level.Yet in this case, because dome-like recessed portion 311 forms the integral part that is arranged in the partition wall 303 in the baffler 300, therefore for silencing apparatus 300, do not look to exhaust effectively cooled off and significantly reducing exhaust sound by passing in exhaust in the silencing apparatus 300.
Figure 18 of the present invention shows disclosed muffler in JP-UM-A 59-194521.As shown in the drawing, this muffler comprises silencing apparatus 333 and outlet pipe 334, and an end of this outlet pipe links to each other with silencing apparatus 333 and the other end links to each other with the relief opening 332 of general purpose engine 311.The middle part of outlet pipe 334 is fixed on the part that comprises relief opening 332 of motor 311 by pair of screws 335.
By this layout, support because silencing apparatus 333 is deflated pipe 334 with cantilevered fashion, so silencing apparatus 333 may cause undue oscillation, thereby uncomfortable vibrating noise is made us in generation.Can attempt to increase the rigidity at the joining portion between outlet pipe 334 and outlet pipe and the engine block, but attempt overall weight and the size that reinforcement can increase the general purpose engine 311 that comprises this muffler.
Figure 19 of the present invention shows disclosed muffler in JP-A 2003-097289.As shown in the drawing, muffler comprises silencing apparatus 343 and outlet pipe 344, and an end of this outlet pipe links to each other with silencing apparatus 343 and the other end links to each other with the relief opening 342 of general purpose engine 341.Silencing apparatus 343 also is deflated pipe 344 with cantilevered fashion and supports, and therefore may carry out oscillating movement around the near-end of the outlet pipe 344 that is fixed to engine block.In addition, silencing apparatus 343 is arranged in cylinder block 347 tops of motor 341, and is fixed in the far-end of outlet pipe 344 by the screw (not shown) that extends in vertical surface.Arrange by this, between silencing apparatus 343 and cylinder block 347, only be provided with the little space of coming attached silencing apparatus 343 and outlet pipe 344 to use for by unshowned screw.Thus, utilize the efficient of silencing apparatus fitting operation in this little space very low.
Above-mentioned difficulties in view of conventional apparatus, expectation provides a kind of muffler that is used for general purpose engine, this muffler can effectively cool off it when transmitting with the route that passes silencing apparatus in exhaust, thereby significantly reduce exhaust sound, this muffler can not cause and can cause generation to make us the improper vibration of uncomfortable vibrating noise, and can attach to engine block with the efficient that improves.
Summary of the invention
According to a first aspect of the invention, a kind of muffler that is used for general purpose engine is provided, this general purpose engine comprises the engine block with relief opening, this muffler comprises: outlet pipe, this outlet pipe have be suitable for first end that links to each other with the described relief opening of described engine block and with this first end second opposed end; And silencing apparatus, this silencing apparatus is limited with mazy type noise reduction chamber therein and is furnished with suction tude in described silencing apparatus, this suction tude has the opening end that links to each other with described second end of described outlet pipe and the closed end relative with this opening end, the described closed end of described suction tude is exposed to outside air, also be formed with one group of perforation in the described suction tude so that the first noise reduction chamber in fluid communication of the inner space of described suction tude and described mazy type noise reduction chamber, described perforation is positioned to apart from the described opening end of described suction tude nearer than the described closed end of distance.
Arrange that by this because the closed end of described suction tude is exposed to the temperature outside air more much lower than the temperature of exhaust, so exhaust is cooled on impinging upon the closed end of suction tude the time.By such coolant exhaust, reduced the heat energy of exhaust significantly.The special like this exhaust sound level that reduced effectively.
Preferably, the described closed end of described suction tude is protruding from the outer surface of described silencing apparatus.The closed end that stretches out like this of described suction tude has relatively large surface area, thereby can improve the cooling to exhaust.
Described outlet pipe can have curved part, and this structure for curvature section becomes directing exhaust gas to advance along a side of described suction tude to impinge upon on the described closed end of described suction tude up to exhaust.By such directing exhaust gas, exhaust can easily be carried out u turn at the closed end place of suction tude.Thus, the exhaust that has been cooled at the closed end place of suction tude with just introduce in the suction tude and directly contact towards the exhaust that the closed end of suction tude advances.Through coolant exhaust with without coolant exhaust between take place thisly directly contact the heat energy that has further reduced exhaust, thereby further reduced exhaust sound.
Preferably, the directing exhaust gas not perforation of a described side of described suction tude on institute edge of advancing.This layout has guaranteed that in exhaust most exhaust can be walked around perforation when the closed end of suction tude advances.
Described silencing apparatus can also comprise the steam outlet pipe that is arranged in wherein, and this steam outlet pipe is used for exhaust from the last noise reduction chamber of the described mazy type noise reduction chamber outside drain to described silencing apparatus.Described suction tude and described steam outlet pipe are arranged with being perpendicular to one another.By arranged in orientation suction tude and the steam outlet pipe to be perpendicular to one another like this, can under the weight that does not increase described silencing apparatus, size or condition of cost, provide long flow path for exhaust.
In an optimal way of the present invention, described silencing apparatus has the first single attachment that is suitable for attaching to described engine block, and described first end of described outlet pipe has with respect to the central axial line of described outlet pipe arranges second attachment and the 3rd attachment with the described relief opening that is used to be attached to described engine block symmetrically.In planimetric map, described first attachment, second attachment and the 3rd attachment are positioned at place, a leg-of-mutton corresponding bight, and the center of gravity of described silencing apparatus is positioned at this triangle.Center of gravity by described first attachment of such layout, second attachment and the 3rd attachment and described silencing apparatus, the described muffler that will comprise described silencing apparatus and described outlet pipe by 3 installation systems is installed on the described engine block, and the weight that can bear described silencing apparatus almost evenly by described first attachment, second attachment and the 3rd attachment.The silencing apparatus of An Zhuaning is highly stable aspect the position like this, and can not carry out causing generation to make us the oscillating movement of uncomfortable vibrating noise.
Preferably, described second end of described outlet pipe has a pair of attachment of arranging symmetrically with respect to the central axial line of described outlet pipe, and in planimetric map, the described attachment of described second end is arranged in outside the described triangle, and from described second attachment of described first end and the 3rd attachment along direction skew away from described first attachment of described silencing apparatus.Attachment by making second end that is positioned at described outlet pipe like this is with respect to second attachment and the skew of the 3rd attachment of first end that is positioned at described outlet pipe, and the rigidity of outlet pipe increases, thereby can keep silencing apparatus can not vibrate basically.
By the described triangle that three straight lines of described first attachment, second attachment and the interconnection of the 3rd attachment are drawn or formed can be isosceles triangle, and described first attachment of described silencing apparatus is positioned at the drift angle place of this isoceles triangle shape.This arranges advantageous particularly, because the weight that supports or bear described silencing apparatus almost evenly by described first attachment, second attachment and the 3rd attachment.
Preferably, described silencing apparatus is formed with support bracket, and this support bracket forms described first attachment.
Described silencing apparatus can have inclined bottom, thereby this inclined bottom is inclined upwardly and limits the space of general triangular structure between the part that comprises described relief opening of this inclined bottom and described engine block, and described outlet pipe is arranged in this triangle space.By the given shape of described triangle space, the big end of this triangle space S provides big opening than small end, thereby receives more substantial air than small end.Thus, outside air is tending towards generating from big end and flows into triangle space and leave the air stream of this triangle space from small end.Outlet pipe externally air is cooled off by it when the triangle space.Since the highest in the temperature of outlet pipe place exhaust, therefore outlet pipe is cooled off and can reduce the heat energy of exhaust very effectively, thereby cause reducing exhaust sound by outside air stream.
Preferably, described inclined bottom part defines the described first noise reduction chamber of described silencing apparatus.By this layout,, therefore can realize further reducing heat energy through by the local first noise reduction chamber that limits of the inclined bottom that is cooled like this time in exhaust because described inclined bottom is also by outside air stream cooling.
Can be furnished with partition wall in the described silencing apparatus, be divided into the described first noise reduction chamber and the second noise reduction chamber with the inner space with described silencing apparatus, this partition wall is roughly parallel to the described inclined bottom of described silencing apparatus and extends.Arrange described partition wall by the described inclined bottom that is parallel to described silencing apparatus like this, two noise reduction chambers of same size or volume can easily be set on the relative both sides of partition wall.This layout can improve the elimination efficiency of silencing apparatus especially effectively.
In an optimal way of the present invention, described engine block has a plurality of first stud bolts, described first stud bolt about the central axial line of described relief opening be arranged in symmetrically relative to each other this relief opening around, and protrude upward to connect described first end of described outlet pipe with respect to described relief opening from described engine block, and described silencing apparatus has a plurality of second stud bolts, described second stud bolt be arranged in symmetrically relative to each other about the central axial line of described suction tude described suction tude described opening end around, and vertically stretch out to connect described second end of described outlet pipe with respect to described silencing apparatus from the described inclined bottom of described silencing apparatus.Each described first stud bolt and corresponding described second stud bolt do not have vertical alignment each other but extend at an angle to each other.
By arrange first and second stud bolts so angledly, be used for operating position can successfully be placed or be arranged on to the instrument that nut is fastened on corresponding one first stud bolt, and can not interfere with the nut that is fastened on second stud bolt.
Preferably, each described second stud bolt is all along the skew of the correspondence of direction from described first stud bolt towards the big end of described triangle space.This layout makes operator nut to be fastened on the stud bolt of cooperation temporarily, and can not interfere with adjacent component.Thus, can described silencing apparatus be installed on the described engine block with the efficient that improves.
According to a second aspect of the invention, a kind of muffler that is used for general purpose engine is provided, this general purpose engine comprises the engine block with relief opening, this muffler comprises: outlet pipe, this outlet pipe have be suitable for first end that links to each other with the described relief opening of described engine block and with this first end second opposed end; And silencing apparatus, this silencing apparatus links to each other with described second end of described outlet pipe and has the first single attachment that is suitable for being connected to described engine block, described first end of wherein said outlet pipe has with respect to the central axial line of described outlet pipe arranges second attachment and the 3rd attachment with the part that comprises described relief opening that is used to be attached to described engine block symmetrically, wherein in planimetric map, described first attachment, second attachment and the 3rd attachment are positioned at place, a leg-of-mutton corresponding bight, and the center of gravity of described silencing apparatus is positioned at this triangle.
Center of gravity by described first attachment of such layout, second attachment and the 3rd attachment and described silencing apparatus, the described muffler that will comprise described silencing apparatus and described outlet pipe by 3 installation systems is installed on the described engine block, and the weight that can support or bear described silencing apparatus almost evenly by described first attachment, second attachment and the 3rd attachment.The silencing apparatus of An Zhuaning is highly stable aspect the position like this, and can not carry out causing generation to make us the oscillating movement of uncomfortable vibrating noise.Obviously, can be according to revising muffler about the identical mode of the mode describing and make amendment according to the muffler of first aspect present invention according to the second aspect present invention structure with the front.
Description of drawings
Fig. 1 is the front elevation that is equipped with according to the general purpose engine of muffler of the present invention;
Fig. 2 is the right side view of Fig. 1;
Fig. 3 is the rear view of Fig. 1;
Fig. 4 is the side view of the part of general purpose engine, demonstrates muffler and attaches to engine block;
Fig. 5 is the planimetric map of the relief opening that is connected to silencing apparatus of engine block;
Fig. 6 is that the line 6-6 along Fig. 5 cuts open the sectional view of getting;
Fig. 7 is the side vertical sectional view of the silencing apparatus of muffler;
Fig. 8 is the preceding vertical sectional view of silencing apparatus;
Fig. 9 is the worm's eye view of the lower partition wall member of silencing apparatus;
Figure 10 is the plan view from above of the upper partition wall member of silencing apparatus;
Figure 11 is the stereogram of silencing apparatus, demonstrates exhaust by the mode that transmits with the route that passes silencing apparatus;
Figure 12 is the planimetric map of silencing apparatus, demonstrates silencing apparatus and is installed to mode on the engine block via 3 installation systems;
Figure 13 A is the side view of the muffler installation structure of expression conventional muffler unit;
Figure 13 B is the planimetric map that is similar to Figure 12, and expression is according to muffler installation structure of the present invention;
Figure 14 is the planimetric map of expression muffler installation structure of modification according to the present invention;
Figure 15 A and Figure 15 B demonstrate the view that is installed to the mode of engine block comprising the muffler of silencing apparatus and outlet pipe;
Figure 16 is the enlarged view of Figure 15 B, the cooling effect that expression obtains by muffler; And
Figure 17, Figure 18 and Figure 19 are the views of the typical case of the conventional muffler unit that adopts in the general purpose engine of expression.
Embodiment
A preferred embodiment of the present invention is described below with reference to accompanying drawings in more detail.
Fig. 1 to Fig. 3 represents to be equipped with the general purpose engine 10 according to the muffler of embodiment of the present invention.Motor 10 comprises engine block 27 substantially and is associated so that the auxiliary device of motor 10 operations with engine block 27.
As shown in Figure 1, engine block 27 is so-called " air cooling inclination single cylinder overhead camshaft (OHC) " types, and comprises the crankcase 13 that is used for keeping therein lubricant oil 12, level also is rotatably installed in bent axle (output shaft) 14 on the crankcase 13, the single cylinder block 15 that forms single-piece and tilt with crankcase 13 with respect to Vertical direction, be received in the reciprocating piston 17 in the cylinder 16 that is formed in the cylinder block 15 slidably, form the connecting rod 18 of the connecting rod between piston 17 and the bent axle 14, be mounted to the cylinder head 21 of the opening end 19 of shifter cylinder body 15, the intake valve 24 and being used to that is used to open and close the suction port 22 of cylinder head 21 opens and closes the exhaust valve 25 of the relief opening 23 of cylinder head 21.
Crankcase 13, cylinder block 15 and cylinder head 21 have constituted the shell 28 of engine block 27 together.Cylinder block 21, cylinder head 21 and piston 17 define firing chamber 29 jointly between them.Cylinder head 21 has valve cage 32, is furnished with valve actuating mechanism and drives intake valve 24 and exhaust valve 25 each other in time relatively with the rotation in response to bent axle 14 in this valve cage.Bent axle 14 has power carry-out part 31 at one end place.
In Fig. 1, reference character 33 expression oil level gages; Reference character 41 expression muffler cover; Reference character 45 expression tail pipes, this tail pipe link to each other with muffler cover 41 and form the discharge end of the vent systems of motor 10; And reference character 26 expressions are for the ground of placing motor 10 thereon.
Auxiliary device comprises the vaporizer 36 of the ignition mixture of suction port 24 (see figure 1)s that are used to make vaporized fuel and air mixing be fed to engine block 27 with formation, be used to filter out the dust in air of suction-type carburetor 36 and air-strainer 35 (see figure 2)s of dirt, the fuel tank 37 of storage of fuels, be used to reduce or eliminate silencing apparatus 40 (see figure 1)s of the exhaust noise of motor 10,10 kick-starter 39 (see figure 2)s are used to pilot engine, be used to detect oily alarm system 50 (see figure 2)s and ignition mechanism 60 (see figure 2)s of the oil level that is kept at the lubricant oil 12 in the crankcase 13.From oil filler 42 (seeing Figure 12) to crankcase 13 supplying lubricating oils 12.Usually close oil filler 42 by filler cap.
As shown in Figure 3, cooling fan 47 is fixedly mounted on the opposite end of bent axle 14.Although not shown, also be connected with engine-driven generator with the opposite end of bent axle 14 with becoming to be driven relation.This generator arrangements is in the inboard of cooling fan 47.The fan guard 48 that cooling fan 47 is attached to engine block 27 (seeing Fig. 1 and Fig. 2) covers.Kick-starter 39 (seeing Fig. 2 and Fig. 3) is covered by kick-starter cover 49, and has and be suitable for being activated by operator or the operating crank 44 of pulling waiting to pilot engine 10 o'clock.Silencing apparatus 40 links to each other with suction port 22 (see figure 1)s of engine block 27 by outlet pipe 43, and muffler cover 41 covers silencing apparatus 40 and outlet pipe 43.Silencing apparatus 40 and coupled outlet pipe 43 form according to muffler of the present invention.
As shown in Figure 4, silencing apparatus 40 links to each other with the relief opening 23 of engine block 27 by outlet pipe 43.Silencing apparatus 40 also links to each other with engine block 27 by L shaped strut (first attachment) 81, and this L shaped strut 81 extends and links to each other with silencing apparatus holding part or lug 82 on the cylinder head 21 that is arranged on engine block 27 by screw 118 from the diapire of silencing apparatus 40.
In order to be connected to relief opening 23, the first end 43a of outlet pipe 43 is provided with the flange with a pair of radially relative attachment (the second and the 3rd attachment) 83,83 (seeing Fig. 6 and Figure 12), and this arranges with respect to the central axial line of outlet pipe 43 attachment with being mutually symmetrical.Attachment 83 is fixed to cylinder head 21 by a pair of threaded fastener, and the nut 89 that this double thread fastening piece is spirally connected by the stud bolt 87 that stretches out from cylinder head 21 with stud bolt 87 constitutes.Between the flange at the first end 43a place of cylinder head 21 and outlet pipe 43, be furnished with packing ring 88, with sealing relief opening 23 (see figure 5)s.Equally, in order to be connected to silencing apparatus 40, the second end 43b of outlet pipe 43 is provided with the flange with a pair of radially relative attachment 84,84 (seeing Figure 12), and this arranges with respect to the central axial line of outlet pipe 43 attachment with being mutually symmetrical.Attachment 84 is fixed to the diapire of silencing apparatus 40 by a pair of threaded fastener, the stud bolt 91 that this double thread fastening piece stretches out by the diapire from silencing apparatus 40 and constitute with nut 92 that stud bolt 91 is spirally connected.
By the single support bracket 81 of such layout and two attachment 83,83, silencing apparatus 40 is located to be installed on the engine block 27 at 3.Obviously, 3 such installation systems are highly stable, and can prevent to produce vibrating noise effectively.According to the present invention, the relevant position of attachment 81,83,83 is defined as: set up certain positional relationship between the center of gravity of attachment 81,83,83 and silencing apparatus 40.In addition, with purpose of description, outlet pipe 43 has curved part 86 for after a while.And the diapire of silencing apparatus 40 comprises away from engine block 27 acclivitous rake 111 (see figure 7)s, so that easily silencing apparatus 40 is attached to engine block 27 and from engine block 27 dismountings by outlet pipe 43.
As shown in Figure 7, silencing apparatus 40 comprises housing 93, and this housing 93 is made of top shell component 93a that is bonded together by snap-in (clench) and bottom shell component 93b, is furnished with partition wall 95 between top shell component 93a and bottom shell component 93b.The housing 93 of Xing Chenging has two noise reduction chambers 101 and 102 on the relative both sides that are arranged in partition wall 95 like this.Partition wall 93 has and comprises mutually stacked upper partition wall member 95a and the two-layer or double layer construction of lower partition wall member 95b.Silencing apparatus 40 also has: suction tude 85, this suction tude generally perpendicularly are arranged in the housing 93 and run through partition wall 95 (that is, upper partition wall member 95a and lower partition wall member 95b); And steam outlet pipe 97, this steam outlet pipe is flatly arranged and is remained between the corresponding half-round recessed 131,124 of upper partition wall member 95a and lower partition wall member 95b, and is furnished with tubulose sound absorbing material 98 between the half-round recessed 131,124 of steam outlet pipe 97 and upper partition wall member 95a and lower partition wall member 95b.Upper partition wall member 95a and lower partition wall member 95b are configured to be limited with the 3rd noise reduction chamber 103 between them.The diapire 105 of housing 93 (its bottom by bottom shell component 93b forms) is strengthened by stiffening plate 99.Sound absorbing material 98 preferably includes glass wool.
Thus, the first noise reduction chamber 101 is limited between bottom shell component 93b and the lower partition wall member 95b, the second noise reduction chamber 102 is limited between top shell component 93a and the upper partition wall member 95a, and the 3rd noise reduction chamber 13 is limited between upper partition wall member 95a and the lower partition wall member 95b.Tubulose sound absorbing material 98 is received in the annular space 104, and this annular space 104 is limited between the half-round recessed 124 of the half-round recessed 131 of steam outlet pipe 97 and upper partition wall member 95a and lower partition wall member 95b.First, second and the 3rd noise reduction chamber 102-103 communicate with each other (this will be described in the back), form mazy type noise reduction chamber.
The opening end 106 of suction tude 85 is fixed to the curling periphery of the inlet hole 112 of housing 93 by snap-in.The opening end 106 of inlet hole 112 and suction tude 85 is at rake 111 place's openings of the diapire 105 of housing 93.Stud bolt 91 (figure 7 illustrates one) from inclined bottom 111 with respect to this inclined bottom 111 meet at right angles ground protruding.L shaped support bracket 81 has horizontal through hole 117 (see figure 4)s of passing through for screw 118.The opening 115 of the closed end 107 of suction tude 85 from the roof that is formed on housing 93 is protruding, and is fixed to the roof of housing 93 by welding.Top shell component 93a and bottom shell component 93b have the joining portion 114 of snap-in mating flange together with formation housing 93, and partition wall 95 is remained between the mating flange of top shell component 93a and bottom shell component 93b.Joining portion 114 is parallel to the inclined bottom 111 of housing 93 and extends.The roof of housing 93 is provided with gripping members 116, so that muffler cover 41 (see figure 4)s are remained on the housing 93 of silencing apparatus 40.
As shown in Figure 8, steam outlet pipe 97 has by on the sidewall that is resisted against the 3rd noise reduction chamber 103 and a closed end (left end among this figure) and lead to outside air and form the opposite end 135 (right-hand member among Fig. 8) of the exhaust openings of silencing apparatus 40.Have in the steam outlet pipe 97: be formed on apart from a closed end than apart from first group of hole at the nearer part place of opening end (exhaust openings) 135 or bore a hole 133, be used for exhaust is introduced steam outlet pipes 97 from the 3rd noise reduction chamber 103; Be formed on apart from the opening end (exhaust openings) 135 of steam outlet pipe 97 than apart from second group of hole at the nearer part place of opening end or bore a hole 134, thereby to allow exhaust to be diffused into the acoustic energy that absorbs exhaust in the sound absorbing material 98.The opening end 106 of suction tude 85 also joins the inclined bottom 111 of housing 93 to by welding.Upper partition wall member 95a has one group of hole or bores a hole 132, is used for exhaust is introduced the 3rd noise reduction chamber 103 from the second noise reduction chamber 102.
Fig. 9 represents the worm's eye view of lower partition wall member 95b.As shown in the drawing, lower partition wall member 95b is shaped by pressing metal plates, and comprises: one group of hole or bore a hole 121 is used for exhaust is introduced the second noise reduction chamber, 102 (see figure 7)s from the first noise reduction chamber, 101 (see figure 7)s; Circular hole 122, suction tude 85 run through by this circular hole; First ridge, its opposite side at lower partition wall member 95b (upside) are gone up and are formed recess 123; And second ridge, its opposite side at lower partition wall member 95b (upside) is gone up and is formed aforementioned half-round recessed 124.Recess 123 defines the bottom of the 3rd noise reduction chamber 103 (see figure 8)s.Half-round recessed 124 defines the bottom of annular space 104 (see figure 7)s, by sound absorbing material 98 (seeing Fig. 7 and Fig. 8) around steam outlet pipe 97 be received in this half-round recessed 124.Perforation 121 is formed on the relative both sides of half-round recessed 124.
Figure 10 represents the plan view from above of upper partition wall member 95a.As shown in the drawing, upper partition wall member 95a is shaped by pressing metal plates, and comprise among this upper partition wall member 95a: the first elongated rectangular opening 126, it is formed on and the corresponding position, position that is arranged in first group of perforation 121 on the side (upside of Fig. 9) of the half-round recessed 124 of lower partition wall member 85b; Second rectangular aperture 127, it is formed on and the corresponding position, position that is arranged in second group of perforation 121 on the opposite side (downside of Fig. 9) of half-round recessed 124; Circular hole 128, suction tude 85 run through by this circular hole; First ridge, its opposite side at upper partition wall member 95a (downside) are gone up and are formed recess 129; And second ridge, its opposite side at upper partition wall member 95a (downside) is gone up and is formed aforementioned half-round recessed 131.Recess 129 defines the top of the 3rd noise reduction chamber 103 (see figure 8)s, and wherein is formed with perforation 132.Half-round recessed 131 defines the top of annular space 104 (see figure 7)s, by sound absorbing material 98 (seeing Fig. 7 and Fig. 8) around steam outlet pipe 97 be received in this annular space.By such formation rectangular aperture 126,127, bore a hole 121 not by upper partition wall member 95a closure, but make the first noise reduction chamber 101 and the second noise reduction chamber, 102 fluid communication with each other.
The muffler of said structure is operated as follows.Introduce suction tude 85 (see figure 7)s that are arranged in the silencing apparatus 40 from the exhaust of engine block 27 (see figure 4)s discharging by outlet pipe 43.In this case, because exhaust has certain flow velocity, therefore most exhaust is advanced towards closed end 107 from the opening end 106 of suction tude 85, and walks around perforation 108 simultaneously.In addition, by means of curved part 86 (see figure 7)s of outlet pipe 43, exhaust is directed and flows along the puncherless side 85a (see figure 7) of suction tude 85, impinges upon shown in the arrow " a1 " on the closed end 107 of suction tude 85 as shown in Figure 11 up to them.
In the time of on the closed end 107 that impinges upon suction tude 85, the speed of exhaust and pressure descend, thereby sound level reduces.In addition, because the closed end 107 of suction tude 85 always is exposed to outside air thereby it has the temperature more much lower than exhaust, so exhaust is cooled on the closed end 107 that impinges upon suction tude 85 time.By such coolant exhaust, reduced the heat energy of exhaust significantly.This is especially effective aspect the exhaust sound level that reduces general purpose engine.In addition, because the closed end 107 that the roof from suppressor case 93 of suction tude 85 stretches out has relatively large surface area, therefore can realize cooling with the efficient that improves to exhaust.
At closed end 107 places of suction tude 85, exhaust is carried out u turn shown in the arrow " a2 " as shown in Figure 11, and subsequently as shown in Figure 11 the perforation from suction tude 85 shown in the arrow " a3 " 108 flow into the first noise reduction chamber 101.By carrying out u turn like this, the uncolled blast air that is guided by the blast air of the closed end 107 of suction tude 85 cooling and closed end 107 towards suction tude 85 directly contacts.The direct contact of these two blast airs has reduced the heat energy of exhaust in addition, thereby has further reduced exhaust sound.
In the first noise reduction chamber 101, exhaust mode with branch shown in arrow " a4 " and " a5 " flows, and passes the perforation 121 that is formed in partition wall 95 (see figure 7)s then.Like this exhaust is introduced in the second noise reduction chamber 102, shown in arrow as shown in Figure 11 " a6 " and " a7 ".At this moment, the speed and the pressure of exhaust further descend, thereby sound level correspondingly reduces.
Afterwards, the exhaust in the second noise reduction chamber 102 is from 132 inflows the 3rd noise reduction chamber 103 of boring a hole, shown in arrow as shown in Figure 11 " a8 " and " a9 ".Subsequently, the exhaust in the 3rd noise reduction chamber 103 is introduced the steam outlet pipe 97, shown in the arrow as shown in Figure 11 " a10 " from 133 (see figure 8)s of boring a hole.Exhaust is advanced towards its exhaust openings 135 along steam outlet pipe 97 then, shown in the arrow as shown in Figure 11 " a11 ".At perforation 134 (see figure 8) places, exhaust can be diffused in sound absorbing material 98 (see figure 8)s shown in the arrow as shown in Figure 11 " a12 ", thereby has further reduced the sound level of exhaust.The exhaust that temperature and sound level have fully reduced is from the exhaust openings 135 (see figure 8)s discharging of steam outlet pipe 97, shown in the arrow as shown in Figure 11 " a13 ".The exhaust openings 135 of steam outlet pipe 97 links to each other with tail pipe 45 (see figure 1)s that are fixed to muffler cover 41.
Should understand, when exhaust is transmitted with the route that passes mazy type chamber (comprising suction tude 85, first chamber 101, second chamber 102, the 3rd chamber 103, steam outlet pipe 97 and sound absorbing material 98) via described group of perforation 108,121,132,133 and 134, thereby the speed of exhaust and pressure have reduced sound level.In addition, the closed end 107 of suction tude 85.In this case because the closed end 107 of suction tude 85 is exposed to outside air thereby it has than the much lower temperature of introducing in the suction tude 85 of exhaust, so exhaust on impinging upon the closed end that is cooled 107 of suction tude 85 time its heat energy reduce.This cooling can reduce the exhaust sound of general purpose engine 10 effectively.In addition, owing to the suction tude 85 and the steam outlet pipe 97 of silencing apparatus 40 are arranged with being perpendicular to one another, therefore can under the situation of the overall dimensions that does not increase silencing apparatus 40, provide long exhaust passage.
As the front with reference to as described in Fig. 4 and Figure 12, by 3 installation systems silencing apparatus 40 is installed on the engine block 27, these 3 installation systems are by forming jointly with lower member: first attachment (support bracket) 81, and it is provided for being attached to the maintenance lug 82 on the cylinder head 21 of engine block 27; Be used for and attached second attachment 83 and the 3rd attachment 83 of the suction port 23 of engine block 27, they with respect to the central axial line of outlet pipe 43 each other in symmetric relation be arranged on an end place of outlet pipe 43.Shown in the planimetric map of Figure 12, first attachment 81, second attachment 83 and the 3rd attachment 83 of muffler (being formed by silencing apparatus 40 and outlet pipe 43) is positioned at the place, corresponding bight of the triangle T of being represented by the dot and dash line shown in Figure 12 1, and the center of gravity G1 of silencing apparatus 40 is positioned at this triangle T inside.Arrange the center of gravity G1 of silencing apparatus 40 by the triangle T 1 that forms with respect to respective attachment portion 81,83,83 like this, can keep the position stability of silencing apparatus 40 and be not easy to vibration under the situation of these attachment (this can increase weight, size and the cost of general purpose engine) not needing to strengthen by 3 installation systems.
Shown in the planimetric map of Figure 12, with respect to the central axial line of outlet pipe 43 each other in symmetric relation be arranged on the other end place of outlet pipe 43 the attachment 84,84 that is used to be attached to silencing apparatus 40 be arranged in the outside of the triangle T 1 that forms by first attachment 81, second attachment 83 and the 3rd attachment 83 at outlet pipe 43 1 end places.By arranging attachment 84,84 with respect to second attachment 83 and the 3rd attachment 83 at deviation post like this, outlet pipe 43 can provide the vibration suppressioning effect of enhancing to silencing apparatus 40.Definite says, first attachment 81 on the position with the support bracket 81 that is linking together by screw 118 with keep the joining portion between the lug 82 corresponding, and second attachment 83 is corresponding with the axis of stud bolt 87,87 on the position with the 3rd attachment 83.
Figure 13 A is in order to contrast purpose, the conventional muffler 230 that expression links to each other with the far-end of the outlet pipe 232 that extends with cantilevered fashion from the cylinder head 231 of motor.The silencing apparatus 230 that is supported on like this on the cantilever type outlet pipe 232 may vibrate shown in arrow " b1 " and " b2 " around the near-end of outlet pipe 232, thereby can produce vibrating noise.Reference character G2 among Figure 13 A represents the center of gravity of silencing apparatus 230.
Figure 13 B is a planimetric map, expression according to the present invention between the triangle T 1 that the center of gravity G1 of silencing apparatus 40 and first attachment 81, second attachment 83 and the 3rd attachment 83 by muffler (comprising silencing apparatus 40 and outlet pipe 43) form jointly the position of foundation concern.The front is discussed this position relation with reference to Fig. 4 and Figure 12, need not here to further describe.
Figure 14 represents to comprise that the modification of attachment 81,83,83 of the muffler of silencing apparatus 40 and outlet pipe 43 arranges.It is roughly the same with layout shown in Figure 12 that this revises layout, are isosceles triangle T2 wherein, and first attachment 81 is positioned at the drift angle place of isosceles triangle T2 by the triangle T 2 that first attachment 81, second attachment 83 and 83 interconnection of the 3rd attachment are formed.Revise in the layout at this, the center of gravity G1 of silencing apparatus 40 also is positioned at the inside of isosceles triangle T2.Layout shown in Figure 14 is that than the advantage of layout shown in Figure 12 the weight of silencing apparatus 40 is applied on three attachment 81,83,83 almost evenly.
Figure 15 A and Figure 15 B show silencing apparatus 40 wherein and are installed in mode on the engine block 27 by outlet pipe 43.
Shown in Figure 15 A, the a pair of radially relative attachment of locating at an end (lower end) of outlet pipe 43 83 (one of them only is shown) attaches to engine block 27 by a pair of threaded fastener (one of them only is shown) cylinder head 21 to be being communicated with relief opening 23 fluids, and this double thread fastening piece constitutes by the stud bolt 87 that stretches out from cylinder head 21 along direction vertically upward with nut 89 that stud bolt 87 is spirally connected.By another double thread fastening piece (one of them only is shown) silencing apparatus 40 is attached to a pair of radially relative attachment of locating at the other end (upper end) of outlet pipe 43 84 (one of them only is shown) then, this double thread fastening piece constitutes by the stud bolt 91 that vertically stretches out from the inclined bottom 111 of silencing apparatus 40 with nut 92 that stud bolt 91 is spirally connected.Also silencing apparatus 40 is attached to cylinder head 21, be fixed firmly to maintenance lug 82 on the cylinder head 21 with support bracket 81 with silencing apparatus 40 by screw 118.Shown in Figure 15 B, by outlet pipe 43 silencing apparatus 40 is installed on the cylinder head 21 of engine block 27 like this.
In this case, because silencing apparatus 40 has away from cylinder head 21 acclivitous inclined bottom 111, therefore between ramped bottom surface 11 and cylinder head 21, be provided with relatively large wedge shape or triangle space S (seeing Figure 15 B), when treating to be fastened to nut 89,92 on the cooperation stud bolt 87,91, this space can be used for holding instrument.In addition, by means of inclined bottom 111, each stud bolt 91 that stretches out from inclined bottom 111 and do not have vertical alignment each other from stud bolt 87 of correspondence that cylinder head 21 is stretched out, but extend at an angle to each other.This angled layout of first stud bolt 87 and second stud bolt 91 has guaranteed that the instrument that is used for tightening nut 92 can place or be arranged on operating position, and can not interfere with the nut 89 that is fastened on the stud bolt 87.Shown in Figure 15 B, the attachment 84 of outlet pipe 43 is offset towards the big end (right-hand member Figure 15 B) of triangle space S from the attachment 83,83 of outlet pipe 43.This layout allows operator not interfere the temporary transient tightening nut 89,92 in ground.Thus, can silencing apparatus 40 be installed on the engine block 27 with the efficient that improves.
Figure 16 is the figure of the cooling effect that explanation can be by the wedge shape between the cylinder head 21 that is arranged on inclined bottom 111 and engine block 27 or triangle space S acquisition.Because the big end (right-hand member among Figure 16) of triangle space S provides bigger opening than small end (left end among Figure 16), thereby it receives more substantial air than small end, therefore outside air is tending towards generating from big end and flows into triangle space S and leave the air stream of this space S from small end, shown in the arrow as shown in Figure 16 " c1 ".Outside air not only cools off the outlet pipe 43 that is arranged in the triangle space S when passing triangle space S, and the diapire 105 of cylinder head 21 and silencing apparatus 40 is cooled off.By such cooled exhaust pipe 43, the heat energy of exhaust when passing outlet pipe 43 significantly reduces.In addition, by of the cooling of outside air stream, when passing the first noise reduction chamber, 101 (see figure 7)s that limited by diapire 105 parts that are cooled like this, exhaust further reduced the heat energy of exhaust effectively to diapire 105.
In illustrated embodiment, silencing apparatus 40 and outlet pipe 43 separately form independently parts of structure.According to the present invention, silencing apparatus 40 and outlet pipe 43 can be formed single-piece each other.
Industrial applicibility
By described layout so far, the present invention can be advantageously used for the gas extraction system for general purpose engine, and this gas extraction system comprises silencer, and this silencer is by integrally formed with this silencer or separate the gas outlet that the blast pipe that forms is connected to engine.
Claims (23)
1. muffler that is used for general purpose engine, this general purpose engine comprises the engine block with relief opening, this muffler comprises:
Outlet pipe, this outlet pipe have be suitable for first end that links to each other with the described relief opening of described engine block and with this first end second opposed end; And
Silencing apparatus, this silencing apparatus has the mazy type noise reduction chamber that limits therein and is arranged in the interior suction tude of this silencing apparatus, this suction tude has the opening end that links to each other with described second end of described outlet pipe and the closed end relative with this opening end, the described closed end of described suction tude is exposed to outside air, also be formed with one group of perforation in the described suction tude so that the first noise reduction chamber in fluid communication of the inner space of described suction tude and described mazy type noise reduction chamber, described perforation is positioned to apart from the described opening end of described suction tude nearer than the described closed end of distance.
2. muffler according to claim 1, wherein, the described closed end of described suction tude is protruding from the outer surface of described silencing apparatus.
3. muffler according to claim 1, wherein, described outlet pipe has curved part, and this structure for curvature section becomes directing exhaust gas to advance along a side of described suction tude to impinge upon on the described closed end of described suction tude up to exhaust.
4. muffler according to claim 3, wherein, a described side of described suction tude is perforation not.
5. muffler according to claim 1, wherein, described silencing apparatus also comprises the steam outlet pipe that is arranged in wherein, this steam outlet pipe is used for exhaust from the last noise reduction chamber of the described mazy type noise reduction chamber outside drain to described silencing apparatus, and wherein said suction tude and described steam outlet pipe are arranged with being perpendicular to one another.
6. muffler according to claim 1, wherein, described silencing apparatus has the first single attachment that is suitable for being attached to described engine block, described first end of wherein said outlet pipe has with respect to the central axial line of described outlet pipe arranges second attachment and the 3rd attachment with the described relief opening that is used to be attached to described engine block symmetrically, and wherein, described first attachment, second attachment and the 3rd attachment are positioned at place, a leg-of-mutton corresponding bight, and the center of gravity of described silencing apparatus is positioned at this triangle.
7. muffler according to claim 6, wherein, described second end of described outlet pipe has a pair of attachment of arranging symmetrically with respect to the central axial line of described outlet pipe, and wherein, the described attachment of described second end is arranged in outside the described triangle, and from described second attachment of described first end and the 3rd attachment along direction skew away from described first attachment of described silencing apparatus.
8. muffler according to claim 6, wherein, described triangle is an isosceles triangle, and described first attachment of described silencing apparatus is positioned at the drift angle place of this isoceles triangle shape.
9. muffler according to claim 6, wherein, described silencing apparatus is formed with support bracket, and this support bracket forms described first attachment.
10. muffler according to claim 1, wherein, described silencing apparatus has inclined bottom, thereby this inclined bottom is inclined upwardly and limits triangle space between the part that comprises described relief opening of this inclined bottom and described engine block, and wherein said outlet pipe is arranged in this triangle space.
11. muffler according to claim 10, wherein, described inclined bottom part defines the described first noise reduction chamber.
12. muffler according to claim 10, wherein, be furnished with partition wall in the described silencing apparatus, be divided into the described first noise reduction chamber and the second noise reduction chamber with the inner space with described silencing apparatus, this partition wall is roughly parallel to the described inclined bottom of described silencing apparatus and extends.
13. muffler according to claim 10, wherein, described engine block has a plurality of first stud bolts, described first stud bolt about the central axial line of described relief opening be arranged in with being mutually symmetrical this relief opening around, and protrude upward to connect described first end of described outlet pipe with respect to described relief opening from described engine block, wherein said silencing apparatus has a plurality of second stud bolts, described second stud bolt be arranged in about the central axial line of described suction tude with being mutually symmetrical described suction tude described opening end around, and vertically stretch out to connect described second end of described outlet pipe with respect to described silencing apparatus from the described inclined bottom of described silencing apparatus, and wherein each described first stud bolt and corresponding described second stud bolt do not have vertical alignment each other, but extend at an angle to each other.
14. muffler according to claim 13, wherein, described triangle space has big end and the small end relative with this big end, and wherein each described second stud bolt all is offset towards the direction of the described big end of described triangle space on edge of the correspondence from described first stud bolt.
15. a muffler that is used for general purpose engine, this general purpose engine comprises the engine block with relief opening, and this muffler comprises:
Outlet pipe, this outlet pipe have be suitable for first end that links to each other with the described relief opening of described engine block and with this first end second opposed end; And
Silencing apparatus, this silencing apparatus link to each other with described second end of described outlet pipe and have first a single attachment that is suitable for being connected to described engine block,
Described first end of wherein said outlet pipe has with respect to the central axial line of described outlet pipe arranges second attachment and the 3rd attachment with the part that comprises described relief opening that is used to be attached to described engine block symmetrically, and
Wherein, described first attachment, second attachment and the 3rd attachment are positioned at place, a leg-of-mutton corresponding bight, and the center of gravity of described silencing apparatus is positioned at this triangle.
16. muffler according to claim 15, wherein, described second end of described outlet pipe has a pair of attachment of arranging symmetrically with respect to the central axial line of described outlet pipe, and wherein, the described attachment of described second end is arranged in outside the described triangle, and from described second attachment of described first end and the 3rd attachment along direction skew away from described first attachment of described silencing apparatus.
17. muffler according to claim 15, wherein, described triangle is an isosceles triangle, and described first attachment of described silencing apparatus is positioned at the drift angle place of this isoceles triangle shape.
18. muffler according to claim 15, wherein, described silencing apparatus is formed with support bracket, and this support bracket forms described first attachment.
19. muffler according to claim 15, wherein, described silencing apparatus has inclined bottom, thereby this inclined bottom is inclined upwardly and limits triangle space between the described part that comprises described relief opening of this inclined bottom and described engine block, and wherein said outlet pipe is arranged in this triangle space.
20. muffler according to claim 19 wherein, is limited with mazy type noise reduction chamber in the described silencing apparatus, and described inclined bottom part defines the first noise reduction chamber of described mazy type noise reduction chamber.
21. muffler according to claim 19 wherein, is furnished with partition wall in the described silencing apparatus, is divided into two noise reduction chambers with the inner space with described silencing apparatus, this partition wall is roughly parallel to the described inclined bottom of described silencing apparatus and extends.
22. muffler according to claim 19, wherein, described engine block has a plurality of first stud bolts, described first stud bolt about the central axial line of described relief opening be arranged in with being mutually symmetrical this relief opening around, and protrude upward to connect described first end of described outlet pipe with respect to described relief opening from described engine block, wherein said silencing apparatus has a plurality of second stud bolts, described second stud bolt is arranged with being mutually symmetrical, and vertically stretch out connecting described second end of described outlet pipe with respect to described silencing apparatus from the described inclined bottom of described silencing apparatus, and wherein each described first stud bolt and corresponding described second stud bolt do not have vertical alignment each other but extend at an angle to each other.
23. muffler according to claim 22, wherein, described triangle space has big end and the small end relative with this big end, and wherein each described second stud bolt all is offset towards the direction of the described big end of described triangle space on edge of the correspondence from described first stud bolt.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005182770A JP4489645B2 (en) | 2005-06-23 | 2005-06-23 | General-purpose engine muffler |
| JP2005183214A JP4455423B2 (en) | 2005-06-23 | 2005-06-23 | General-purpose engine muffler structure |
| JP183214/2005 | 2005-06-23 | ||
| JP182891/2005 | 2005-06-23 | ||
| JP2005182891A JP4448797B2 (en) | 2005-06-23 | 2005-06-23 | General-purpose engine muffler support structure |
| JP182770/2005 | 2005-06-23 | ||
| PCT/JP2006/312564 WO2006137506A2 (en) | 2005-06-23 | 2006-06-16 | Muffler unit for general-purpose engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101203663A CN101203663A (en) | 2008-06-18 |
| CN101203663B true CN101203663B (en) | 2010-05-19 |
Family
ID=37688563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680022435XA Expired - Fee Related CN101203663B (en) | 2005-06-23 | 2006-06-16 | Muffler of general-purpose engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4489645B2 (en) |
| CN (1) | CN101203663B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8251173B2 (en) * | 2009-07-23 | 2012-08-28 | Briggs & Stratton Corporation | Muffler attachment system |
| CN105507985B (en) * | 2015-12-19 | 2018-03-23 | 李家森 | Sound attenuation assembly for automobile engine |
| CN109252949B (en) * | 2018-11-07 | 2024-03-15 | 河南柴油机重工有限责任公司 | Arrangement structure of V-shaped diesel engine muffler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5373119A (en) * | 1990-11-23 | 1994-12-13 | Kioritz Corporation | Exhaust muffler for internal combustion engine |
| US5732555A (en) * | 1994-10-19 | 1998-03-31 | Briggs & Stratton Corporation | Multi-pass catalytic converter |
| CN1208120A (en) * | 1997-08-13 | 1999-02-17 | 本田技研工业株式会社 | Intake silencer system |
| CN1478994A (en) * | 2002-08-02 | 2004-03-03 | 安德烈亚斯・斯蒂尔两合公司 | Muffler |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5960337U (en) * | 1982-10-15 | 1984-04-20 | 本田技研工業株式会社 | Mounting device for silencers in internal combustion engines |
| JPS6181524A (en) * | 1984-09-27 | 1986-04-25 | Honda Motor Co Ltd | Vertical crankshaft type internal-combustion engine |
| JPH0861059A (en) * | 1994-08-23 | 1996-03-05 | Kubota Corp | Muffler of working vehicle |
| JPH09303133A (en) * | 1996-05-13 | 1997-11-25 | Nisshin Kogyo Kk | Muffler for engine |
| JP2002089229A (en) * | 2000-09-13 | 2002-03-27 | Kubota Corp | Muffler |
| JP4150240B2 (en) * | 2002-10-04 | 2008-09-17 | ヤンマー株式会社 | Anti-resonance structure of engine exhaust silencer |
-
2005
- 2005-06-23 JP JP2005182770A patent/JP4489645B2/en active Active
-
2006
- 2006-06-16 CN CN200680022435XA patent/CN101203663B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5373119A (en) * | 1990-11-23 | 1994-12-13 | Kioritz Corporation | Exhaust muffler for internal combustion engine |
| US5732555A (en) * | 1994-10-19 | 1998-03-31 | Briggs & Stratton Corporation | Multi-pass catalytic converter |
| CN1208120A (en) * | 1997-08-13 | 1999-02-17 | 本田技研工业株式会社 | Intake silencer system |
| CN1478994A (en) * | 2002-08-02 | 2004-03-03 | 安德烈亚斯・斯蒂尔两合公司 | Muffler |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2003-97289A 2003.04.03 |
| JP特开2004-124883A 2004.04.22 |
| JP特开平7-332059A 1995.12.19 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101203663A (en) | 2008-06-18 |
| JP2007002712A (en) | 2007-01-11 |
| JP4489645B2 (en) | 2010-06-23 |
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