US1594711A - Mixing device for inlet manifolds - Google Patents

Description

Aug. 3,1926.

G. O. CHAPMAN MIXING DEVICE FOR INLET MANIFOLDS Filed Oct. 15, 1924 Patented Aug. 3, 1926.

UNITED, STATES 1,594,111 PATENT" OFFICE.

. GEORGE 0. CHAPMAN, OF SANTA ANA, GALIFORId'IA.

MIXING DEVICE FOR INLET MANIFOLDS.

Application filed October 15, 1924. Serial No. 743,691.

My invention relates generally to inlet manifolds for internal combustion engines from some rotating part of the engine with which the manifold is associated, and to arrange on said rotating member within the.

manifold chamber means for effecting a positive and uniform flow of gaseous fuel through the manifold and for intensifying the mixing and commingling of the vaporized liquidhydrocarbon and air just prior to the time that'the mixture enters the inlet ports leading into the combustion chambers of the engine with which the manifold is associated. j L

A further object of my invention is to provide simple and eflicient means for causing the gaseous fuel to flow evenly and uniformly in both directions through the manifold from the point where said gaseous fuel enters said manifold, thereby insuring even distribution of. the gaseous fuel charges that. are taken into the combustion chambers of the engine on the suction strokes of the pistons therein, and which action insures a uniform production of power by the engine while the same is in operation.

With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of parts that will be hereinafter more fully described and claimed and'illustrated in the accompanying drawings, in which- Figure 1 is a vertical section taken lengthwise through the center of an inlet manifold that is constructed in accordance with my invention; v

.Figure 2 is an elevational view of one of the rotary mixing members used in my improved manifold and with one of the blades thereof in section; I c Figure 3 is a perspective view showing a "modified form of one of the rotary mixing members;

Referring by numerals to the accompanying drawings, which illustrate a practical embodiment of my invention, lO-designates the body of the manifold, the same comprising a horizontally disposed tubular member,

from the central portion of which depends a tubular extension 11 that is directlyconnected to. a suitable source of gaseous fuel supply, preferably a carburetor. Leading from the ends of the tubular body 10 are short upward and rearward extensions 12 that are connected directly to the inlet ports or passageways that lead to the combustion chambers of the engine with which the manifold is associated. Removably seated in one end of the manifold body is a plug 13 having a centrally arranged bearing 14 for a shaft 15, and which latter extends axially through the manifold body, its opposite end having bearing in a bracket 16 that extends outwardly from the corresponding end of the manifold body.

This shaft may be rotated in any suitable manner, either by a train of gearing such as 17, that is driven'from the fan belt or said shaft may be driven by a small electric motor or from some rotating part of the enine with which the manifold is associated.

ecured to the shaft 15 at points near its center and adjacent to the point where "the opening in member 11 communicates with the chamber in the manifold are small fans 18 preferably of the type having four inclined blades.

The blades of these fans are, with respect to each other, inclined in opposite directions,

, tion indicated by the arrow in Figure 1 gaseous fuel entering the central portion of the manifold from member 11 will be drawn in both directions and forced toward the ends of the chamber within said manifold.

Secured on the .shaft 15 adjacent to each fan 18 and between the latter and the adj acent outlet 12 is a second fan 19, preferably of the type having four inclined blades, and these last mentioned fans are set or secured upon shaft 15 so that their blades are staggered or offset with respect to the blades of the immediately adjacent fans 18.

Secured on the shaft 15 immediately adjacent to each fan 19, and between the latter and the adjacent outlet 12, is a hub 20 carryin four or more blades 21 that are incline to correspond with the inclination of the blades of the adjacent fans 18 and .19, -and each blade 21 is provided with a of the blades are staggered or offset with respect to each other, for by so doing the gaseous fuel passing through said slots while the blades are revolving w1ll be more thoroughly mixed and broken up than if the corresponding slats in the series of blades occupy the same circumferential plane. 1

Inasmuch as the shaft 15 is driven from some part of the engine with which the manifold is associated, it will be understood that the said shaft will be rotated at a speed corresponding to the speed of the engine, and as said shaft is rotated the fans 18 and 19 and the hubs 20 carrying the slotted blades 21 will be revolved within the chamber in the manifold to the sides of the extension 11 to the carburetor and as a result gaseous fuel from said carburetor will be drawn into the central portion of the chamber within the manifold, andvby the revolving fans said gaseous fuel will be forced in both directions through the manifold toward the outlets 12 therefrom.

The pairs of fans 18 and 19 produce a certain degree of suction within the central ortion of the chamber in member 10, therey constantly drawing gaseous fuel from the carburetor, and this gaseous fuel is, by the fans 18 and 19, forced outwardly from the center past the revolving slotted blades 21, and as the gaseous fuel passes between these slotted blades and through the slots thereof it will be very thoroughly mixed and broken up and in such condition it will be forced with a certaindegree of ressure outthrough the outlets 12 that lea to the combustion chambers within the engine.

Thus as lon as the engine is in operation and shaft 15 1s driven a constant and uniform flow of gaseous fuel is delivered to the combustion chambers within the engine,

and in passing the fans, and particularly those having the slotted blades, the gaseous fuel is thoroughly 'mixed and broken up so that it will readily ignite and burn within the combustion chambers, thereby insuring an even flow of power from the engine.

In themodified form of gaseous fuel mixing wheel or propeller illustrated in Figure 3, a hub 23 carries a series of offset curved prongs or fingers, such as 24. This form of mixing element may be substituted for the hub 20 carrying the slotted blades 21, and it will be-understood that as the fingers 24 revolve rapidly within the manifold chamber the gas passing therethrough will be very thorough y mixed and commingled.

Obviously, minor changes in the size, form v and construction of the various parts of my invention may be made and substituted for those herein shown and described without departing from the spirit of my invention, the scope of which is set forth in the appended claim.

I claim as my invention:

.The combination with an inlet manifold for internal combustion engines, which man-.

GEORGE o. CHAPMAN.

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