US1781001A - Muffler - Google Patents

Description

Nov. 11,1930. 0. w. EISELE MUFFLER Filed Oct. 5, 1927 CMHLES Wi /31w A TTORNE V 1Q noise of the escaping Patented Nov. 11, 1930 umrso sTATEsPATE OFFICE CHARLES W. EISELE, DETROIT, MICHIGAN, ASSIGNOR TO CHRYSLER CORPORATION,

OF HIGHLAND PARK, MICHIGAN, A CORPORATION OF DELAWARE' MUFFLER Application filed October 5, 1927. Serial No. 224,064.

My invention relates to new and useful improvements in'the construction of a muflier for theexhaust gases of an internal combustion engine of the type used in automotive 5 vehicles.

An important object of my invention is to provide a muflier in which theexhaust gases may pass directly thru the muffler or may be diverted thru chambers which deaden the gases. From this point of view the invention consists in a novel and simple construction of a muflier, in the peculiar arrangement and combination of parts, and in certain details of construction as will be more fully hereinafter set forth.

Another object of the invention is to simplify the construction and provide an inexpensive muffler which deadens the noise as well as provides an improved rigid con struction.

Other objects and advantages will more fully appear from the following description takenin connection with the accompanying drawings in which:

view thru my improved muflier.

Fig. 2.is a sectional view on line 22 of Fig. 1.

Fig. 3 is a sectional view on line 33 of t Fig. 1. I 1

Referring to the drawings, the reference numeral 10 designates an annular outer shell formed from a flat sheet metal stamping with "its lateral edges joined together as at 12. The opposite ends of the shell 10 are closed by cup shaped stampings 14 and 16, each being provided with an outwardly turned flange18 which is secured to the shell 10 as by welding. The end portions 14 and 16 are each provided with flanges as for the reception of conduits, the one illustrated as the exhaust pipe 22 thru which the exhaust gases are conducted to the muflier and the other the tail pipe24 thru which the exhaust gases are conducted from the mufiler. I have shown a sleeve 26 between the flanges 20 and the pipes 22 and 24 to provide further strengthening of the connection at this point.

The portion of the muflier between the end portions has been formed into four cham- Figsl is a longitudinal partially sectional.

bers, namely; a rear end chamber 28, an upper chamber 30, lower chamber 32 and a central chamber 34. The end chamber'28 is-formed by a radial partition 36, which like the end members is-formed cup shaped and provided with a flange 38 which receives a sleeve 40 forming a communication between the end chamber 28 and the inner chamber 34.

The upper and lower chambers 30-and 32 are formed by a pair of partitions 42 extending longitudinally from the end 14 to the partition 36. The partitions are each formed from a piece of sheet metal, having a semicylindric i channel extending longigitudinally thereof, centrally located. The outer edges or the partitions are bent in the direction of'the channels to form flanges 46 which are secured to the shell 10 as by welding. The two partitions are placed together in such a manner that the channels 44 form the chamber 34. The oppositeends of the chamber 34 are in. communication with the exhaust pipe 22 and the sleeve 40 respectively. The lower channel is provided with a plurality of apertures 48 at the end opposite the exhaust pipe. The apertures 48 form a communication between the chambers 34 and 32 and the apertures 50 form a communicaion between the chambers 32 and 30; the partition 36 being stamped out as at 52 to form a communication between the chambers 30 and 28.

F A valve .54, controlled by the lever 56, has been provided in the sleeve 40 so that the chambers 30 and 32 may be cut 013? and the exhaust gas permitted to pass from the exhaust pipe 22 directly to the chamber 28 and ,tail pipe 24 thru the chamber 34, when the baflie at varying distances thereby deadenwardly, reducing the area of the lower chamber 32 at the end where its gases are expelled thus providing a continuous expansion passage from the chamber 34 to the tailpipe 24.

The mufiier is inexpensive to manufacture as its parts are few and formed from sheet metal stampings. The parts have been so arranged that the assembly is rigid, it being supported radially by the end walls and the partition 36, and longitudinally by the partitions 42.

It will be understood that various changes in the construction and arrangement of parts may be made without departing from the spirit of my invention, and it is not my intention to limit the scope of my invention other than by the terms of the appended claims.

What I claim is:

1. A mufiier of the class described comprising an outer shell, end walls adapted to close the opposite ends of said shell, a partition extending longitudinally of said shell adapted to form a pair of chambers each on the opposite sides of said partition, said partition being formedby a pair of stampings, each having a struck out portion forming a central chamber extending longitudinally between the stampings of said partition, an

, inlet passage comuncating with one end of said central chamber, a communication between the opposite end of said central chamber and one end of one of the chambers formed by said partition, a communication between the opposite end of said last named chamber and the other of said chambers formed by said partition, and an outlet passage communicating with said last named chamber.

2. A mufli'er of the class described comprising an outer shell, end walls adapted to close the opposite ends of said shell, a two part partition extending longitudinally of said shell forming a central chamber between said partition and a pair of chambers at the opposite sides of said partition, said partition having one of its parts provided with openings at one end to form a communication between the central chamber and one of the chambers at opposite sides of said partition, and having openings thru both parts of said partition -to form a communication between both chambers at the opposite sides of said partition, and means for conducting exhaust gases thru said mufiier first in one direction thru the central chamber, thru another chamber in the opposite direction and thru the other chamber in a direction to that of the central chamber.

3. A muflier of theclass described comprising an outer annular shell, end walls fitting the inner periphery of said shell, a pair said shell with its opposite end off center and forming a pair of outer tapered chambers on opposite sides of said partition, means for permitting exhaust gases to enter said central chamber, thence pass thru said chamber to the small end of one of the outer chambers, thru the last named chamber and to the smaller end of the other of said outer chambers and out the opposite end of said chamber.

4. A mufiler of the class described comrising a cylindrical shell, end walls at the opposite ends of said shell having an inlet and an outlet opening respectively, a radially projecting partition adjacent one end of said shell forming a small and a large chamber, a longitudinally extending partition in the formed therein forming an upper and a lower chamber, said central chamber having one end positioned to receive the exhaust gases and its opposite end provided with openings to form a communication between said central chamber and said lower chamber, said longitudinal partition being provided with openings to form a communication between said upper and lower chambers, said radial partition being provided with an opening to form a communication between said upper and small chambers, a 'sleeve forming a communication between said central chamber and said small chamber, and a valve in said sleeve for directing the exhaust gases thru all'of said chambers when closed and for permitting direct communication between said central chamber and said small chamber when said valve is closed. a

5. A muflier of the class described comprising an outer shell, a partition in said shell forming a pair of chambers, said partition being provided with a plurality of openings at one end of the chambers forming a communication from one .chamber to the other, and a diagonally positioned baflie plate adjacent said openings to intercept and divert exhaust gases at an angle to the flow of the gases through said openings, the distancefrom each of said openings to said baflle plate being difierent 6. In a mufller, the combination of a partiings formi a communication from one chamber to t e other, and a baflle in front of said openings to intercept and divert ex-' haust gases at an angle to the flow of the gases throu h said openings, the distance rom each 0 said openings to said baflie bein diflerent.

In a muflier, the combination of an outer shell, end walls for said shell, a cylindrical partition extending longitudinally of the mufiier and at an angle to the axis of said mufller, and lateral flanges on said cylindrical partition having their outer edges in engagement with the inner periphery of said shell forming a .pair of chambers, said cylindrical partition and said flanges bein provided with openings for (permitting ex aust gases to enter the cylin rical partition and the chambers formed by the lateral flan es.

CHARLES W. EI ELE.

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