Патент USA US2403403код для вставки
July 2, 1946. ' U. SAUER 2,403,403 MUFFLER Filed Aug. 21, 1944 3 14/!) m Uriah Samar Patented July 2, 1946 2,403,403 UNITED STATES PATENT orrics 2,403,403 MUFFLER Urban Sauer, Pittsburgh, Pa., assignor of two ?ftlis to Harry R. Levy, Mcl‘icesport, Pa. Application August 2 1, 3.9 44,‘ Serial N0. 559,445 8 Glaims. (Cl. 181—58) 1 2‘ This invention relates to a muffler for the ex» haust gases of internal combustion engines gen~ erally and other situations where an explosive e}; haust gas-must be silenced and dissipated. From the standpoint of low back pressure and . v - . arrangement of parts, as will be more speci?cally referred to and illustrated in the accompanying drawing, but it is to be understood that changes, variations, and modi?cations may be resqrllédlig which fall within the scope- of the invention-es motor efficiency it is generally believed that the claimed. . » i i 1,», straight-through type of mu?'ler or some adapta~ In the drawing: , > , : .1 '.~ tion or variation of the same, is most efficient. Figure 1 is a longitudinal section taken sub However, this type of construction has its draiv~ stantially through the center of a mu?ier con-, back inthat it tends to store up pressure in the 10 structed according to an embodiment ofethisina resonating and expansion chambers surrounding vention. the straight-through high pressure passageway _ _ Figure 2 is a sectional view taken on line thereby reducing the ei?ciency of the muiiier by of Figure 1. building up a back pressure when the expansion chambers or resonating chambers become ?lled 15 up with accumulated gases, and these chambers i . Figure 3 is a sectional view taken on line 3-3 of Figure 1. -. _1. - i -- . Referring to the drawing, the numeral. Wides ignates an outer cylindrical jacket or-shell of suit; able length or diameter which has secured in the intake end thereof an end ,Wall H formed with sure become stream walled flowing oil asthrough against the the central main high str p it» through passageway. This necessitates inuiilers of considerable length and material to afford 20 a cylindrical ?ange i3 telescoping theadjacent adequate storage facilities to take off the excess end of shell H}. The'opposite end of shell“! has pressure varying with the degree of output of var~ secured thereto, or formed integrabtherewithr a ious engines. In addition the storage of gases and substantially conical member’ l2’, and a' discharge pressure in the expansion or resonating chambers or outlet nipple l 4 extends from the apex of coni results in heavy condensation, which remains in 25 the muffler, causing internal corrosion and shorter durability. cal member l2. ' ‘I’ ' I 15f? ‘ An intermediate casing l?sis disposed'within the shell H], forming an'outer chamber 16' there In order to provide a means whereby the heavy about, the purpose for which’ Willhe hereinafter pressure of the gases is expanded freely without described. The intermediate casing l5 includes'a hindrance or drag on the free ?ow of the main 30 cylindrical rear part ll which hasv the rear end streams, I provide a means whereby the expanded thereof positioned in forwardly spaced relation gases are constantly drawn into a central suction to end wall H. A frusto-conical member’ I8 ‘ex; zone of the main stream from the rear, thereby tends from the forward end of the-cylindrical iber H, the larger end of frusto~conical menu!v preventing bers provided accumulation for in the rnuiller. in the expansion ' 35 By the means hereinafter to be described the desired silencing quality is also obtained with .. is being rearmost: A second frustmconic'a'l i'nember I9 is secured to or formedintégrally with fr1.ist-o~conical member it, having the sm'a'll’e'nd little or no back pressure at extremely high speeds thereof rearmost and the largegend foremost and by a substantially less niuii‘ler length, and less secured as at 2!! to the inner side of_ the‘forward muffler size, thereby affording a saving of mate 40 and ofshell I0. ' ' ' rial. An inner casing 2| is disposed within the inter A further object is to provide a muiiler con mediate casing iii and includes a ‘cylindrical rear struction that can be interchangeably used with . 22 positioned interiorly of cylindrical engines of various degrees of pressure and volume 45 member ll, thereby forming an intake chamber of exhaust output, with slight adjustments in 23 therebetween. An annular end wall 24 is'seI-J spacing and sizing of the various parts and cured between the adjacent rear ends of cylindri-r courses. cal members i‘! and 22. closing the rear end‘of in Another object is to obtain reduced condensa take chamber 23. ' V ' ‘ tion, resulting in longer durability due to less 50 The cylindrical member 21 has secured there tendency to corrode. to, or formed integrally therewith, a frusto-i Another object is to obtain a mu?lcr that will conical member 25, which is disposed in inwardly afford quicker acceleration of the engine. more spaced relation with. respec'?to'frusto-conical power, carbon from a tion of less fuel consumption and reduction of deposits, all of which advantages result : great reduction in, if not entire elimina back pressure, under high speed, as well as normal driving conditions. , i To the foregoing objects, and others which may hereinafter more fully appear, the invention con sists of the novel construction, combination and 60 member !8. A second or forward frusto-conical member 26, having theismall end thereof rear~ most, is secured to or formed integrally with frustowconical member 25 andis disposed in. in-v wardly spaced relation with respect to frusto conical member is. A velocity increasing cham‘-. ber 21 is formed between frusto-conical members: [8 and 25, and in order to provide for not only 2,403,403 3 4 increasing the velocity of the forwardly moving back pressure which may occur in expansion chamber 29 will be relieved by the gases discharg gases in chamber 21, but to also provide for spiral movement of the gases and breaking up of the gases into a plurality of streams or courses, I have provided a plurality of spirally arranged CH blades 28 which are secured between frusto conical members l3 and 25. Frusto-conical mem bers I3 and 26 form an expansion chamber 29 therebetween which progressively increases in diameter toward the forward end of the mu?ier. As the gases move forwardly in the high pres— sure expansion chamber 29 under the increased ing from chamber 29 through opening 33 into chamber IS. The gases may expand in chamber l6 moving rearwardly and entering rear cham ber 3|, from this chamber the gases will then expand additionally as they are discharged into the inner rear chamber 41 disposed within cylin drical member 22. The gases in chamber 41 moving forwardly in the inner casing 2| will be increased in velocity by the frusto-conical cham ber 48 within frusto-conical member 25. The gases discharging at the small forward end of chamber 48 will expand in low pressure expansion there may be come accumulation or backing up of gases in chamber 23. In order to provide for 15 chamber 46. The gases leaving chamber 46 will pass between rrusto-conical members 34, 33, 40 relief of any back pressure in chamber 29, a pin» and 42 and will be given a spiral movement there rality or series of openings 30 are formed in by increasing the velocity thereof as these gases frusto-conical member l9, each series including move forwardly. The high pressure gases dis a plurality of circumferentially spaced apart charging from the forward end of chamber 29 openings and one series being spaced from an will pass between conical members |2 and 24 and other a desired distance and with the openings of velocity thereof will be increased by the reducing one series of a different size than the openings of of the chamber formed between these conical another series. Openings 30 provide communica~ members, while at the same time the gases are tion between chamber 29 and chamber l6, so that the gases may move rearwardly in chamber I6 25 given a spiral movement. These spirally moving gases entering vortex chamber 31 will then pass and engage in chamber 3|, which is an end forwardly into discharge nipple 34. Due to the chamber and which communicates with the open creation of the vortex in chamber 31, a low pres rear end of inner casing 2|. A pair of tubes 32 sure central area will be formed which will cause which are disposed in rearwardly convergent velocity provided by the tapered chamber 21, relation are connected together at their conver gent ends and then connected to an intake nipple 33 which extends through rear wall I |. The tubes 32 are connected to cylindrical member 22 of in ner casing 2| so as to discharge the exhaust gases into intake or rear chamber 23. a suction of the low pressure gases from the open apices 36, 44 and 45, thereby pulling the low pressure gases forwardly from chamber 45. The mixing of the low and high pressure gases in vortex chamber 31 has the effect of further re» ducing the pulsations in the gases so that when these gases are ?nally discharged into the atmos The forward end of inner casing 2| has secured phere they will be silently discharged and the thereto a conical member 34 and a plurality of pulsations will be substantially entirely elimi spirally arranged blades 35 are secured between nated. conical member l2 and conical member 34. The The effect of the vortex chamber 31 is that an apex of conical member 34 is open, as indicated 40 adequate suction will be created at all speeds of at 33, and a vortex chamber 31 is formed be the engine, the suction produced being propor tween the apices of the two conical members l2 tionate to the volume of gases entering chamber and 34. A conical member 38 is disposed in 31. In the event there is no back pressure created teriorly of the conical member 34 and a plurality in expansion chamber 23, the amount of gases of spirally arranged blades 39 are interposed be discharged into outer chamber l6 will be rela— tween conical members 34 and 38. A conical tively small. As an example, during the opera member 40 is disposed within conical member 33 tion of the engine at slow speed the exhaust gases and a plurality of spiral blades 4| are interposed will be discharged between casings l5 and 2| in between conical members 38 and 40. A centrally an amount such that there will not be any back disposed conical member 42 is disposed within pressure created in chamber 29. As the engine conical member 40 and spiral blades 43 are se speed is increased the back pressure may build cured between conical members 40 and 42. Coni up in chamber 29, and if this occurs the back cal members 33 and 40 are formed with openings pressure is relieved by the gases discharging from 44 and 45 respectively in the apices thereof so chamber 29 into chamber l6 through openings 30. that gases from forward chamber 46 positioned With reference to the manner in which the within frusto-conical member 26 will be dis structure is assembled, the embodiment illus charged spirally within vortex chamber 31. trated by the drawing, would require construction In the use of this muffler intake nipple 33 is in three sections. Chamber 23 to be ?rst as connected to the exhaust of an engine or the like. sembled, consisting of the shell I1 and the shell Exhaust gases from the engine passing through 2| with the end Wall 24 being either welded to nipple 33 will be divided by the divergent tubes 32, there being two such tubes shown, but it will be understood that two or more of these tubes may be used. The gases entering intake cham the side walls or pressed on in a lap ?t over the side walls I1 and 2|. The divergent tubes 32 are ?anged on or welded on the openings in the wall ber 23 will move forwardly into velocity cham 65 2|. The blades 28, or as many as are desired, are welded onto wall 25 of the second section 21 or ber 21, where the gases will be broken up into preferably the spiral blades 28 may be pressed spirally moving streams. The breaking up of the out of the shell 25 by a proper die, thus With gases into a plurality of spiral streams has the member l8 forming the second section 21, which effect of reducing the pulsating peaks of the gases, and also has the effect, due to the reducing 70 is then lap ?tted over walls 2| and H of the ?rst section 23, also the second section 21, lap ?tted diameter of chamber 21, of increasing the velocity over walls 2| and 23 of the ?rst section, may be of the gases as they move forwardly. The gases spot welded. The third section 29 is likewise tight discharging from chamber 21 will enter expansion ?tted, by lap ?tting and spot welding over walls chamber 29, this chamber increasing in size in 25 and I8 of section 21. the direction of the movement of the gases. Any 75 The spiral blades shown at 35, 39, 4| and 43 5 2,403,403 between the conical members are preferably pressed into the walls of the conical members by 6 chamber between the ends thereof for effecting spiral movement of the gases within said high proper dies in such a manner that the high point pressure chamber. of the blade on the ?rst conical member is op 6. A mu?ler comprising an outer cylindrical posite the low point of the blade of the second casing, a conical forward end carried by said cas conical member. Of course, the blades can be ing, a discharge nipple extending from said coni also welded on the periphery of the conical mem cal forward end, an inner casing disposed within bers. The conical members with the blades of said outer casing, a conical forward end carried the periphery thereof are then moved together by said inner casing and disposed within the for in order, with the conical member l2 forming the 10 ward end of said outer casing, spiral blades dis outside wall of the tapered portion of the muffler posed between the conical forward ends of said and the entire tapered portion being welded onto inner and outer casings, an intermediate casing the outer casing In at 20. The outer casing 10 disposed between said inner and outer casings is also welded to the tapered portion of the muffler and terminating at the forward end thereof at at 20 with the wall H welded to the side walls of 15 the base of said ?rst conical end, means discharg lo and also welded to the intake member 33. ing gases into the space between said inner and What I claim is: intermediate casings, said intermediate casing 1. A muffler comprising an outer cylindrical having openings forwardly of the rear end there casing, a conical forward end carried by said of whereby some of the gases in said space may casing, a discharge nipple extending from said 20 enter the chamber formed between said interme conical forward end, an inner casing disposed diate and outer casings, said inner casing at the within said outer casing, a conical forward end rear thereof having communication with said carried by said inner casing aid disposed within chamber, a plurality of conical members within the forward end of said outer casing, spiral blades the conical forward end of said inner casing, and disposed between the conical forward ends of said 25 spiral blades between adjacent pairs of said coni inner and outer casings, an intermediate casing cal members. disposed between said inner and outer casings '7. A mu?ler comprising an outer cylindrical and terminating at the forward end thereof at casing, a conical forward end carried by said cas the base of said ?rst conical end, means dis ing, a discharge nipple extending from said coni charging gases into the space between said inner cal forward end, an inner casing disposed with and intermediate casings, said intermediate cas in said outer casing, a conical forward end car ing having openings forwardly of the rear end ried by said inner casing and disposed within the thereof whereby some of the gases in said space forward end of said outer casing, spiral blades may enter the chamber formed between said in disposed between the conical forward ends of termediate and outer casings, said inner casing 35 said inner and outer casings, an intermediate being open at the rear thereof and having com casing disposed between said inner and outer cas munication with said chamber whereby all of the ings and terminating at the forward end thereof gases in said chamber will enter said inner casing at the base of said ?rst conical end, means dis from the rear thereof. charging gases into the space between said in 2. A muffler comprising an outer casing, an in ner and intermediate casings, said intermediate ner casing in said outer casing, an intermediate casing having openings forwardly of the rear end casing between said inner and outer casings and thereof whereby some of the gases in said space forming an outer low pressure expansion cham may enter the chamber formed between said in ber, said intermediate casing also forming with said inner casing a high pressure chamber there between, means in said high pressure chamber for increasing the velocity of the gases, said inter mediate casing having openings communicating termediate and outer casings, said inner casing at the rear thereof having communication with said chamber, and spiral blades between said in ner and intermediate casings between the ends thereof. said high pressure chamber with said outer low 8. A mu?ier comprising an outer cylindrical pressure chamber, said inner casing being open 50 casing, a conical forward end carried by said at the rear end thereof and communicating with casing, a discharge nipple extending from said said low pressure chamber, said inner casing conical forward end, an inner casing disposed forming an inner low pressure chamber, and within said outer casing, a conical forward end means at the forward ends of said inner and in carried by said inner casing and disposed within termediate casings for increasing the velocity of the forward end of said outer casing, spiral blades the gases discharging from said high pressure disposed between the conical forward ends of chamber, said latter means being so constructed said inner and outer casings, an intermediate and arranged as to also produce a suction for ex casing disposed between said inner and outer cas hausting gases from said inner low pressure ings and terminating at the forward end thereof chamber. at the base of said first conical end, means dis 3. A mu?ier as set forth in claim 2 including charging gases into the space between said inner means at the forward end of said inner casing and intermediate casings, said intermediate cas~ for effecting spiral motion to the gases discharged ing having openings forwardly of the rear end from said inner chamber. thereof whereby some of the gases in said space 4. A muiiier as set forth in claim 2 wherein said may enter the chamber formed between said in latter means includes a plurality of spirally ar termediate and outer casings, said inner casing ranged means at the forward end of said high at the rear thereof having communication with pressure chamber for effecting increased velocity said chamber, said inner and intermediate cas coincident with spiral motion. ings being formed of opposed frusto-conical por tions. 5. A muffler as set forth in claim 2 including spirally arranged means in said high pressure 70 URBAN SAUER.