US1634823A - Manifold for multicylinder internal-combustion engines - Google Patents

Description

' 1,634,823 July 1927' A. P. BRUSH NANIFOLD F08 MULTICYLINDER INTERNAL COMBUSTION ENGINES Filed June 11. 1920 V 2 Sheets-Sheet 1 @wvantoz 656a, M0717? Era/M attunup July 5, 1927. 1 634,;23

A. P. BRUSH MAfiIFOLD Fba MULTIGYLINDER INTERNAL COMBUSTION ENGINES Filed June 11. 1920 2 Sheets-Sheet 2 I Patented July 5, 1927.

UNITED STATE-S I ALANSON nnnusn, or DETROIT, MICHIGAN.

- MANIFOLD FOR MULTICYLINDER INTERNAL-COIMBUSTION ENGINES.

Application filed June 11, 1920. Serial No. 388,189.

The invention relates to manifolds for multi-cylinder internal combustion engines and consists in the novel construction by which a proportionate and homogeneous mixture is fed to each of the cylinders. To this end the invention consists in the construction as hereinafter setforth.

In the drawings:

Figure 1 is a front'elevation partly in section of the manifold; V

Figure 2 is a horizontal section on line 22 of Figure 1 1 Figure 3 is a vertical central cross-section on line 3-3 of Figure 1.

In the operation of internal combustion engines by explosive mixtures formed of air and liquid fuel there is a tendency for the mixture formed in the carburetor to lose its homogeneity in passing through the manifold. subdivisions of the manifold are not symmetrical and also where there is a change in direction of the stream. Furthermore, where the stream is passing through straight portions of the manifold, the frictional resistance of the walls will retard the velocity of the outer portions of the stream with the result that more or less of the liquid car ried in suspension will drop out and collect on the walls. Thus it is difficult to main tain just the same quantity and quality of mixture in each of the several cylinders.

WVith the present invention greater homogeneit-y of the mixture is maintained byv symmetrizing the stream in advance of the first subdivision thereof and by arranging in alignment with said symmetrizing means, but out of the path of the subdivisions, a heated chamber, in which any liquid which is thrown out of the divided stream will be vaporized and returned thereto.

In detaihA is the exhaust manifold for a multi-cylinder engine, and I3 is the-inlet manifold, both being arranged on the same side of the engine block. C is the inlet to the manifold B which, as shown, is a cross over passage in the engine block, the carburetor (not shown) being arranged on the opposite side of said block, I) isa portion of the manifold B in alignment with the passage C and from which the branches E and E extending laterally. There is also a straight passage F through this portion D which communicates with the chamber G surrounding a portion H of the exhaust conduit A. I is a member This is particularly true where the placed at the entrance to the portion D forming a Venturi passage by which the stream of mixture passing through the cross-over C will be symmetrized. As this venturi is in direct alignment with the passage I any liquid carried in suspension and which is thrown out of the stream at the bend by its own inertia will enter the pocket G and this being heated by the exhaust conduit, will vaporize the liquid and return the vapor into the streanr. y

In the specific construction preferably employed the manifolds and Bare separately formed, so that the portions D and G thereof will register and securing means, such as bolts 'or studs J, will clamp these portions together. The branches E and E of the manifold B extend to the inlet ports in the block from which passages extend to the different cylinders.

With the construction as described there is no tende cy to heat the air in the explosive mixture or that portion of the liquid fuel in the mixture which remains in suspension, but the larger masses of liquid, which would tend to collect on the walls of the conduit, are thrown through the port F into the chamber G and will be vaporized and returned. Any portion of the liquid fuel which may fall out in the cross-over passage G will be again picked up and commingled with the stream by the venturi I and as this venturi symmetrizes the stream, the divided portions thereof passing through the branches E and E will be uniform in quality. V

WVhat I claim as my invention is:

1. In a multi-cylinder engine, the combination with an intake conduit having a plurality of symmetrically arranged branches, of a venturi in advance of said branches for symmetrizing the stream before subdividing the same, and a heated chamber communicating with said conduit in alignment,

with said venturi for receiving and trapping any portion of the liquid fuel thrown out of the stream by its inertia and for vaporizing and returning the same.

2. In a multi-cylinder engine, the combination with an intake conduit, an inlet por tion and a plurality of symmetrically arranged laterally extending branches, an exhaust conduit adjacent to said intake conduit, and a chamber integral with said exhaust conduit and disposed beyond the juncture of said intake inlet portion and its branehea, aaid chamber ((Hlllllllllltflt'iHit with said intake in alignment with the inlet yortion thereot l'or reeeiviing Elli trapping an portion of the liquid l'nel thrown out by its inertia when the direetion of the atreain is; el'ianged.

3.111 a multi-qrlinder internal ('illllbllS- tion engine, the eoinhination \fh an engine block having a eroaa-orer pamore tor the intake, of an inlet manifold delaraabl x arranged on one aide ol aaid blorl; having a portion ronnnuniratino with aaid rro:-;- -o\'er, and a plurality of laterally ntending braiiehee on opposite rider; thereetl. an em haust conduit on the name ride, ot the blorlC having a portion extending' adjaront to raid intake aiaiiilold. and a ehainbrr auriaaraling said exhaust uonduit ronuuuniraa with said intake manifold in alinnnu-nl ah said erosaover, whereby any liquid lurl thrown out oil the atreain by its inertia will he reoeired by said ehainher, vaporized and re turned.

t. In a mulli-eyliuder engrinm the emulsination with an intake conduit haringg; a aubstantially horizontal portion, a pair of" l'a-anoh parsageways extending laterally ot Fillt'l horizontal portion in opposite direotions, and a heated elnnnber oomn'nmieating in alignment with said horizontal portion and disposed on the opposite side of said branch guaesageway from said horizontal portion, said chamber communicating with said horiximtal portion.

In a niuliii-cylinder engine, the combination with an intake conduit:- haring a horiaontal portion, a pair of branch passage ways extending laterally of said horizontal portion in opposite directions forming a bend, a horizontally arranged chamber in alig nnnent with said lnnrizoirlal portion and iflisposed on the opposite side o'l' said laler-- ally extending braneh paasagewaya from said horizontal portion, the boltomot said ehamber bein slightly lower than said hor- .iaontal portion, and an exhauat conduit extending substantially vertieally through said chamber forming an annular heated. chamber surrounding the same.

in testimony whereof I allix my signature.

ALANSON P. BRUSH.

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