US1715453A - Carburetor - Google Patents

Description

J. GCDDYN June 4, 1929.

CARBURETOR Filed Jan. 2, 1926 outlet passage thereof; the invention being Patented J une 4, 1929.

JOHANNESGODDYEOE HAARLEMMERMEER, NETHERLANDS.' y

CARBURETOR.

Applicationnied Januarya, i926, sei-iai No. 78,857, and inthe Netheriandssep'tember 2li,v i925'.

This invention relates to improvements in carburetors, and more particularly in the fuel primarily designed for application to the type of carburetor shown in my prior French Patent No. 582,736, granted October 20, 1924.

According to the patented construction, the

throttle and fuel valves are connected toygether for movement in unison, and the former is therein represented as of thedrum type. The fuel inlet passage is disposed axially ofthe throttle valve, and the openings and the dimensions of the closing parts of said valve are so arranged that the passage for .the mixture is open in the initial position of the valve and is greater than the inlet opening 1 for the air; the difference between the sizes of these passages decreasing uniformly the more the valve is opened until by the time the valve is wide open the passages are equal in size.

The disadvantage of this type of carburetor is that when the air supply passage and the passage for carrying off the mixture have to beV disposed in alinement, whichV is frequently the case, .so that outlet of the mixture passage lies directly opposite t-he air supply passage, lthe current of air interferes with the v flow of the fuel from the fuel passage or nozl embodiment;

zle and the motor cannot attain its maximum number of revolutions.

According to the present invention, this ob jection is overcome by covering the outlet of the fuel passage .by a plate in such a waythat gaps are left at both sides of the plate, while the two perforated ends of the plate are bent or curved lso `as to form projections that extend into the mixing chamber.

v An embodiment of the invention is illustrated in the accompanying v drawing, wherein: y

Figure 1 is a vertical sectional view of such Figs. 2 and 3 are vertical and horizontal sections, respectively, taken on lines Il-II and III-III of Fig. 1;

-Fig. 4 is alvertical section at right angles to the plane of section of Fig. 1. i

As shown insaid drawing, the carburetor is provided with an air inlet passage 1 and an outlet passage 2 for the mixture, which pasf sages are in line with each other. The fuel inlet passage 3 opens into a pocket 4 which itself opens into the mixing chamber 5; such pocket 4 being located directly opposite the air inlet passage 1 and having a narrow krectangular or slot-like outline as represented in dottediineS-inlrig. a frhami'xnglhamber 5 is provided by tlieinterior of the hollow throttle valve 55, which latter is mounted to c rotate within the casing 56 ofthe carburetor l This valvejinclude's u a hollow hub portion 57 ,whichfitsover a l Y about alhorizontal axis.

horizontal, hollow shaft 58 that is disposed centrally ofthe casing, and said shaft, in turn,

encloses thev'fuel passage 8. v i

The outlet pocketl 4 underlies a cover plate 7 that project into vthe mixing chamber 5; and this plate is provided with a plurality of vsmall aperturesl 8 vwhich enable leakage there- 'l Y UjNiTE sra s i A-rNr err-ict;-

6, the two ends of which are so bent or curved A as to form lconvex transverse ridges or ribs cuts off communication ybetween that portion of the ,mixing chamber whereinto the pocket opens and the rest ofsaid chamber: on the contrary, the arrangement and dimensions of theplate and pocket are such that at each Y end of the latter narrow slot-like gaps 10Y are left` uncovered, and it is through these gaps that the fuelV escapes into chamber5 for admixture with the air.

The operation is substantially as follows :Y

Air entersthechamber 5 through the 'inlet' y l and lowsi'n bothl directionsaround the plate 6, beingv deflected to some extent by the projecting ribs 7 on the p'laterso that itis guided past the gaps 10. As it' passes these leaving the carburetor through the outlet 2, I claim as my invention 1Q In 'a carburetor, a cylindrical, casingv having an air inlet and an" outlet for theA mixture located opposite each other, ahollow gaps, the air current necessarily exerts some 'same direction as the original airA current and l valve rotatable within` said casing to con-f trol said inlet and outlet and providing an internal mixing chamber adapted to com- 1y municate with the same, said *valvev having a hollow, horizontal hubportion which is clisposed axially ofsaid casing, av fuel supply l i Y .passage enclosed by said hule and terminat-- ing in a narrow, slot-like outlet pocket opening into the mixing chamber directly oppo-` site the air inlet, vand a coverfplate in saidl kchamber immediately overlying said pocket l but terminating at its ends short of the correspending ends of the pocket so as to leave narrow outlet'gaps for the fuel; said rplate Vhaving its opposite ends provided with con- Vex,v transversely arranged ribs which pro# ject intothe path ofthe 'aircurrent in the :flow through said gaps into'thev air Current.

mixingv chamber so as to guidefthe air past" such gaps and thusincrease the suction be hind the plate, whereby the `fuel is caused to In testimony whereof I affix my signature. f Y i Jonnunns GQDDXN,

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