US1774632A - Intake manifold - Google Patents

Description

p 2, 1930. c. P. BRocKwAY 1,774,632

INTAKE MANIFOLD Filed Oct. 22, 1920 3 Sheets-sheaf. 1

nzn [U1 INVENTOR. Carl 'P. brockvay BY I I I ATTORNEY p 2, 1930- c. P. BROCKWAY 1,774,632

INTAKE; MANIFOLD Filed 00 1,. 22, 1920 3 Sheets-Sheet 2 IN V EN TOR. Carl D. Bro ckwy A TTORNEY P 1930- 0. P. BROCKWAY 1,774,632

INTAKE MANIFOLD v Filed Oct. 22, 1920 5 Sheets-Sheet 3 IN VEN TOR. Carl R Drockwgf.

A TTORNEY Patented Sept. 2, 1930 UNITED STATES PATENT OFFICE CARL 1. BROCKWAY, OF TOLEDO, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE TILLOTSON MANUFACTURING COMPAN DELAWARE Y, OF TOLEDO, OHIO, A CORPORATION OF INTAKE MANIFOLD Application filed October 22, 1920. Serial No. 418,802.

This invention relatesto improvements in intake manifolds and has for its mainobject to supply each cylinder with a like quantity and quality of motor fluid at all times.

Another object is to expose the mixture supplied from the eaburetor to like surfaces in the intake manifold.

Another object is to provide structure and method to supply each cylinder of the engine with such an equal distribution of fuel that no cylinder has any advantages over the others.

Still another object is to prevent one arm of the manifold from pocketing more gases and heavy particles of the mixture than any other arm so that no cylinder is over-enriched with fuel.

The invention also has for one of its objects to prevent excessive fuel charges in certain cylinders which causes heavy deposits of carbon therein. I

And it is a further object of my invention to arrange the inlets of the several conduits of the intake manifold around a distributing center in the consecutive order in Which the respective cylinders are fired.

Another object of my'invention is to provide a manifold in which each branch to the separate cylinders provides a direct line of travel for the mixture from the carburetor to the engine. I i i A further general ObJECt of my invention is to provide a manifold which is simple as well as highly efficient and practical and which may be applied readily to an internal combustion engine.

"With the above and other objects in view v my invention consists in novel features of I Figure III is a cross section through the manifold on the center line of the branch conduits.

Figure IV is a fragmentary view, partly in section, showing the distributing chamber.

ignates an internal combustion engine hav- I ing a carburetor 6 and an intake manifold in communication with each other by means of a conduit 8 and an enlargement 9, from which radiate a number of arms 1O, 11, 12, 13 leading respectively to the cylinders of the engine. The enlargement 9 and arms may be integral or separately connected. The arms of the manifold, Figures I to IV, branch out horizontally from the enlargement 9, turn at an angle towards the engine and dip below the horizontal plane of the enlargement and terminate in the respective ports of the cylinders.

-W'ithin the enlargement is a chamber 14 and extending into said chamber are cross webs 15 formed by the intersection of the several arms of the manifold meeting in the center of the chamber, thus dividing the upper section of the chamber into ur like compartments which for convenience have been designated by the numerals 1', 2', 3, and 4 to correspond with the respective cylinders 1, 2, 3, and 4 with which they are in communication by the respective arms of the manifold. These compartments are circular in cross section and merge into the arms of the manifold. \Vith this construction any mixture will be exposed to like surfaces in all four compartments.

' It will be seen from Figure III that the numerals 1, 2, 3, and 4 respectively represent the cylinders of the engine and thefiring order of these cylinders will be. 1, 3, 4, and 2. The arrangement of the inlets of the several arm'sof the manifold around a central point in the web 15 is such, that starting with the inlet or compartment 1' and completing a circle around that point the compartments 4 3, 4', and 2 will follow consecutively in the order of the firing of the cylinders. arms 10 and 11 extend in opposite directions from the compartments 1 and 3 in the outer half of the enlargement and are in alignment for a portion of their length, the arm 11 being shorter than arm 10 dips below the longer arm 12 which extends from compartment 1. Contiguous with compartment at, is compartment 2 from which extends the arm 13. These arms 10, 11, 12, and 13 respectively form communication between the compartments 1, 3, 1, and 2 and the cylinders which are supplied from these respective compartments in the order of the firing of the cylinders.

From this arrangement it will be observed that cylinderl is fed through compartment 1, while compartments 3 and 2 may receive a slight charge and 1 will receive less than either 3 or 2. When cylinder 3 is fed through compartment 3, compartments 1 and 1 may receive slight charges, and 2 will receive less than either 1 or 1. This gives any heavy particles collected in compartment 2 time to fall back into the chamber 14. \Vhcn cylinder at is fed through compartment 1. 3 and 2 may receive slight charges and 1 will receive less than 3 and 2. \Vhen cylinder 2 is fed through compartment 2, l, and 1 may receive slight charges and 3 will receive less than 1 or 4'. The cycle is then completed with compartment 1" ready to receive its charge.

In ordinary manifolds the arms 11 and 13 would meet each other on the side next to the engine and the arrangement of the arms of the manifold would be such that the firing order could not give a delivery through compartments 1, 2, i, 1 in a consecutive circular order. Thus when cylinder 1 draws in mixture, compartments 3 and 2 would pocket fuel, then when cylinder 3 is drawing in mixture it would be fed through compartment 1 in the ordinary arrangement, again causing a pocketing of fuel in $3 and 2 thus over-enriching cylinder 1 which would be next to tire. This will not occur with my de vice since I feed the arms of the manifold through the compartments 1, 2, 3, and 4 in a consecutive circular order. There will be no alternate feeding between two arms so that the other arms will pocket an undue amount of fuel. Moreover, this gives a uniform cycle for all the compartments so that all the compartments are in exactly the same condition with reference to pocketed fuel, eddy currents, etc., when each of them delivers mixture to a cylinder. Therefore each cylinder will receive a charge exactly like the others in both quantity and quality.

In the modification illustrated in Figures V to. VII inclusive, I have located the enlargement 21 of the manifold below the horizontal plane of the intake ports of the engine The so that the arms 22, 23, 24:, and 25 of the manifold will extend upwardly from the enlargen'ient 21.

The conduit 20 in the shape of'an inverted conical frustrum having its narrow lower end 26 in alignment with the mixing chamber of the carburetor and its upper, larger end 27 in alignment with a chamber 28 of the enlargement, establishes communication between the carburetor and the arms of the manifold. IVithin the chamber 28 is placed a renrovable cone-shaped baflle 29 which, like the webs 15 in the modification of Figure 1, causes the mixture from the carburetor to be exposed to like surfaces in the chamber 28 for each cylinder and will produce a like result as obtained in the first described moditication.

Figure VIII is still another embodiment of my invention. From a web 30, depends a removable bafile 31 into a chamber 32 of the enlargement 33. In Figures V to VIII the arrangement of the arms 22, 23, 21, and 25 of the manifold around a central point in the enlargement is identical with that described in relation to Figures 1 to 1V.

, Any form of distributing chamber and baffie arrangement may be used so long as the chamber and ballles are symmetrical with reference to the outlets to the various branches leading to the cylinders and to the inlet leading from the carburetor. I have shown only one inlet leading to the distributing chamber, however my invention contemplates any number of inlets to said chamber. hIoreover, any kind of motor fluid may be used, as I do not wish to be limited to a fuel mixture formed in a carburetor.

The operation of the device will be obvious from the description. While the engine is running, suction from the cylinders draws fuel from the carburetor into the chamber of the enlargement where it is exposed to like surfaces on the web or batlle for each of the cylinders.

While arm 10in Figures I to IV is being supplied with mixture, arms 11 and 13 may be slightly charged since they are in a more direct line of the flow of the mixture. The amount pocketed in arm 12 would be negligible. Cylinder 3, next in order, is charged allowing possibly a slight charge to be collected in arms 12 and 10 and a negligible amount in arm 13. Cylinder 4: is next supplied leaving a small amount of fuel in arms 11 and 13 and a negligible amount in arm 10. When cylinder 2 draws in fuel, arms 10 and 12 may pocket some fuel with anegligible amount passing to arm 11. The same cycle is repeated when cylinder 1 again draws in mixture. It will be seen from this arran ement and operation that all cylinders are ed alike, and the mixture is distributed to each arm of the manifold in a uniform manner in relation to all the remaining arms.

n," in) I am aware that the particular embodiment of my invention herein shown and described, is susceptible of considerable variation Without departing from the spirit of the invention and therefore I desire to claim the same broadly as well as specifically, as indicated by the appended claims.

What I claim is:

1. In a multicylinder internal combustion engine, the combination of a common distributing chamber for fuel gases; a plurality of outlet ports positioned in the Wall of said chamber in symmetrical relation thereto; an inlet port positioned in the Wall of the chamber; a baflle plate oppositely positioned relative to the inlet port and partially covering the outlet ports; a plurality of conduits connecting the outlet {ports of the distributing chamber to the cylinders of the engine, the order of connection of the conduits with reference to the position of the ports and cylinders to said ports and said cylinders being difierent.

2. In a multicylinder internal combustion engine the combination of a substantially cylindrical chamber, a plurality of outlet ports positioned sequentially and symmetrically around one end of the wall of said cylinder; a single inlet port positioned centrally of the other end wall of the cylinder; a baflie plate positioned within the cylinder opposite to and displaced from said inlet port; a plurality of conduits in number equal to the number of cylinders each of which connects a cylinder with a port in the distributing chamher, the order of connection of said conduits to the ports in the chamber being different than the order of connection to the cylinders of the engine.

In testimony whereof, I aflix my signature.

CARL P. BROCKWAY.

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