US1833256A

US1833256A - Muffler for internal combustion engines

Info

Publication number: US1833256A
Application number: US422759A
Authority: US
Inventors: Charles R Miner
Original assignee: MIKE TAMBOR
Current assignee: MIKE TAMBOR
Priority date: 1930-01-23
Filing date: 1930-01-23
Publication date: 1931-11-24
Anticipated expiration: 1948-11-24

Description

Nov. 24, 1931. c. R. MINER 1,833,256

MUFFLER FOR INTERNAL COMBUSTION ENGINES Filed Jan. 23, 1930 menkoz 'Patented Nov. 24, 1.931

lunifi#En STATES v CIIAnnmBMIIINEmor: sAN FRANCISCO,` CALIFORNIA, AjssIGNonoF'joN .NIKE mmoaorwszm .IsIulNCIsco,:CALIFORNIA` Non INTERNAL CoivInUsTIoN ENGINEs 'n Application .medY Ianary 23, 1930.'.` 'seriai; No. i 4131159. t

The invention relates-toimulers lfor use wlth lnternal combustIon engines, an'dhas a`s?its object to provide means for'drawing intothe muffler -air from-the outside atmosphere, heating the air withiny the mulller and thoroughly mixing it with the exhaust gases, thereby producing a mixture which is lighter than the cold air and which will therefore rise and become thoroughly diffused with the atmosphere, thus preventing carbon monloxide poisoning. Moreover, Vthe heated air combines readily with the carbon monoxide, both within Athe muliler and after passing from the same, thus producing carbon dioxide, which is non-poisonous.

The present invention attains` the above object in a simple and eflicient manner, without the use of chemicals. The device is inexpensive and entirely automatic in its operation. f

The invention will be more readily understood by reference to the accompanying drawnigs setting forth ,a simple embodiment of the invention. s

In the drawings:

Fig. 1 is a central longitudinal section through the improved muller, the exhaust pipe from the engine and the exhaust from the muffler being indicated in elevation;

Fig. 2 is an end view of the device; and

Figs. 3 and flare sections on lines 3--3 and 4 4 respectively of Fig. 1.

Referring to the drawings, A denotesthe exhaust pipe from the engine, B denotes the muffler generally, andy C the exhaust from the muliler.V

As shown, the muler comprises an outer.

ing suitable perforations therein. `Preferf ably the perforations are formed by punching the metal outwardly, leaving a portion of the metal extending in the direction of gas" low, thus serving to directthe lowof gasesl toward the muller exhaust. The perforations 12 are provided in the forward end of the sleeve and on the major portion of its circumference,l leaving, however, an unperi forated portion 13 at the rear end of the sleeve. 4 The sleeve 11 mayzbesecuredftothe outerv casing" by. any suitable means `1.4y well known in thev mufllerart.v Fittedfwithin Athe r sleeve V11 is ,an inner sleeve .-15 f .which Y is .materially shorter .than the outer sleeve, and'is perforated throughout its circumference a-ndalsoat the' forward portion..A These. perforations .designatedat 17 are similar .to theperforations .12.inthe outersleevefzandare.desi ed to direct gases in .aeforward direction. L Yreferahlytheperforations 17' .are .out` of; alignment with the perforations 12, so `thatva .thorough mixing of gases will be insured.` 'The sleeve 7.15. is langedat its .rear end .as at. 16, Iand .these flanges itagainst-.the outer-sleeve. `Suitable connectionslz .between.t the inner and outer sleevesare also. provided. I

. The .arrangement ofzthen-sleev'es described above leavesat the` rear ofthe muler a chamber '18" f'whicha-is closed. at Lthe. sides .by the unperforated portionv 13.. of the .outer .sleeve and artiallyclosed atftheforwardendfby theA ange .16. .Atthereapportion of the chamber. 181lthere isprovided aplatev. 19 perforated throughout its area as at 20,.and centrally.apertured to: permit the engineexhaust pipe .A to pass therethrough. The ,purpose of the perforations 20. to 'permit air to .be drawninto the-chamber 18.31111 thence into the muler. by. means .of the suction. produced by the ordinaryoperatonof the mulitler.`

y.In operation the. exhaust gases enterthe space -within the; 4inner fsleevel; through the engine exhaustpipe .Arandlthese gasespass spacebetweenthe Y,two sleeves, .thence intothe space betweenzthe ,outer fsleeve. and. the casing, Y from whichthey passoutwardly throughthe mulller exhaust. intoathe atmosphere. v

' The passageof the exhaust., gases produces a suction which draws. air Afromethe. outside atmos herezthroughthe perforations 20.. into there atively:large chamber 18 surrounding the engine exhaust, pipe. .This air` isheated Incontra 'ro A y,

` thence.throughythe,perforations 17 .into the by contact with the exhaust.pipe.A',and asit is drawnf into Vthe yinner .chamber itbecomes mixedv with the exhaust gases. Further admixture `takes place.. in passing .through staggeredvk perforations tof .the mulller, fand at the same time further heating results. The result is that by the time the gases and air pass from the muffler exhaust C, a thorough admixture of the gas and air and the heating of the air has taken place. This gaseous mixture due to the heating of the air is considerably lighter than the coldair outside of the muffler, and as a result the mixture passing from C risesand becomes thoroughly diffused with the outside atmosphere.. Moreover, a certain proportion of the heated air has combined with the carbon monoxide within the muffler. and further combination takes` place on issuing from thek muffler, so that the poisonous effect of the exhaust gases 'is done awav with.

A particular embodiment of theinvention has been. described in detail for the Apurpose of illustration. but it will be understood that the invention is not to be limited to' such details.

What I claim is.:`

1. A muffler comprising an outer casing having an exhaust outlet at one end. a sleeve fitted within the outer casing and perforated for the major portion of its length. but having an unperforated portion at the end remote from the muffler exhaust outlet. an inner perforated sleeve spaced from the firstmentioned sleeve and terminating adiacent the beginning of the unperforated portion of the first-mentioned sleeve in a direction away from the exhaust outlet. kforming a chamber having an unperforated cvlindrical wall extending from the forward end .of the inner sleeve to the forward end of the muffler and surrounding the engine exhaust pipe. and an end plate havin!! perforations for the admission of air to said chamber. and having a central opening to permit passage of the engine` tending from the forward end of the innerL sleeve to the forward end of the muffler and surrounding the engine exhaust pipe.

3. A muffler comprising an outer casing, having an exhaust inlet at one end and an exhaust outlet at the other, spaced concentric i perforated sleeves within the outer casing, the outer of said sleeves having an unperforated portion toward the exhaust inlet, and the inner of said sleeves terminating substantially at said unperforated portion and having an out-turned flange at the end thereof closely fitting the outer sleeve and forming a chamber having an unperforated cylindrical wall surrounding the exhaust inlet.

4. A muffler comprising an outer casing, having an exhaust inlet at one end and an exhaust outlet at the other, spaced concentric perforated sleeves within the outer casing, the outer of said sleeves having an unperforated portion toward the exhaust inlet, and the inner of said sleeves terminating substantially at said unperforated portion and having an out-,turned flange at the end thereof closely fitting the outer sleeve and forming a chamber having an unperforated cylindrical wall surrounding the exhaust inlet, and means for admitting fresh air to said chamber.

In testimony whereof I affix my signature.

CHARLES R." MINER.