US2383697A - Turbulence producing valve - Google Patents

Description

Aug. 28, 1945. A. H. WASSMAN 2 2,333,697 TURBULENCE PRODUCING VALVE Filed Nov. 28, 1942 2 Sheets-Sheet 1 INVENTOR AUGUST H.WASSMAN ATTORNEY TURBULENCE PRODUCING VALVE Filed Nov. 28, 1942 2 Sheets-Sheet 2 FIG.|O.

INVENTOR 7 AUGUST H.WASSMAN ATTORNEY Patented Aug. 28, 1945 UNITED- STATES PATENT. orrics.

TURBULENCE raonucmo. VALVE August 1!. Wassman, St. Louis County, Mo., as-

signor to Carter Carburetor Corporation, St. Louis, Mo., a corporation of Delaware Application November 28, 1942, Serial No. 467,210 2 Claims. (01. 261-41) This invention relates to valves for controlling the supply of fluid through'a pipe and particularly where the fluid includes a vapor, the fine atomization and even dispersion of which is desired. An example of this is found in carburetors for internal combustion engines-where a mixture of air and liquid fuekv'apor is drawn past the throttle valve into the engine intake I manifold.

It is a continuation, in part, of my co-pending application, Serial No. 445,442, filed June 2, 1942.

which creates turbulence in the engine intake and substantially assists in the atomization and dispersion of the liquid fuel vapor.

In the drawings illustrating the invention: Fig. 1 is a sectional view of a carburetor embodying the novel throttle valve.

Fig. 2 is a view of the novel valve somewhat enlarged so as to illustrate the formation of the vapor diverting ribs.

Fig. 3 is an edge view of the valve.

Fig. 4 is a top view of a modified valve.

Fig. 5 is a'section on line 5-45 of Fig. 4.

Fig. 6 is a top view of a modifled'valve.

Fig. 7 is an edge view of the valve illustrated in Fi 6.

Fig. 8 is a sectional view of the flange portion of a carburetor.

Fig. 9 is a top view of the throttle valve illustrated in Fig. 8.

Fig. 10 is an edge view of the valve illustrated in Fig. 9. I

The carburetor shown in Fig. l is of the downdraft type having an induction conduit with an air inlet portion l, mixing chamber 2, and outlet 3, there being main and primary venturis 4 just anterior to the mixing conduit; Air is sup plied through the upper end of the conduit past a choker valve 5 and fuelis supplied through a main nozzle 6 from a fuel bowl I having the usual constant level mechanism. Idling fuel is supplied through jet tube 8 and passage 9 to port [0 adjacent the edge of the throttle when closed.

The discharge of fuel and air mixture is controlled by the throttle valve plate ll pivotally mounted'ona shaft ii in the outlet portion of the mixture conduit. The throttle plate is provigied-with'a pair of outwardly projecting curved "6r pocketed baflles, as at It and It, baflie i3 havaccelerating fuel from a throttle operated pump I9 located, as usual, in bowl 1. Accelerating fuel is discharged against the anterior face of the throttle plate (Fig. 1) and hole l5 in diverting bailie I3 is provided to facilitate the passage ofthe accelerating charge to the engine. More than one of the holes may be provided, if desired.

In Figs. 4 and 5, the baliles 20 and 2! are provided with flanges 22 and 23 which may be secured beneath usual screws 24 for attaching the throttle plate 25 to its shaft 2%. i

it have found that the lower speeds; that is around 20 miles per hour when the efiective suction applied to the main nozzle is relatively low so that fuel is supplied therefrom in droplets of substantial size, these are efiectively atomized upon passing the throttle to form a visible mist. The novel turbulence producing throttle results in marked increase in economy, particularly, at the lower speeds and, in fact, permits the use of smaller fuel metering restrictions without adverse efiect upon the performance of the engine, as would otherwise occur. The ribs may be permanently secured to or formed on the throttle plate, as in Fig. 2, or may be separately formed and attached as in Figs. 4 and 5. The carburetor fuel metering restrictions may be adjusted, a suggested, after the turbulence throttle is installed, but the novel valve will produce improved economy and smoother operation of the engine without other charge.

In Figs. 6 and 7 the baflles 30 and 31 attached to the throttle plate 32 are somewhat similar to the pocketed baifles l3 and M of Figs. 2 and 3 but are constructed'of perforated material such as fine mesh screen. By the use of screen bailles,

the fuel mixture flowing through .the induction conduit is agitated as it passes through the perforations and around the throttle valve. The use of screen baflles or ribs creates less restriction to the fuel fiow and facilitates the use of much higher baflles which, in turn, intercept a major portion of the fuel mixture passing thethrottle valve.

The modification of the valve illustrated in Figs. 8, 9 and 10 differ from the preceding modification in that the bames l5 and 38 are identically positioned on the throttle valve-31. Baiiles 35 and 3 are spherically shaped and set inwardly from the edge of throttle valve 31 so that they maintain a spaced relationship to the walls of the mixture conduit during the opening movement of the throttle valve, as indicated by the broken lines 19.

Throttle plate 31 assumes the position shown in Fig. 8 during idling and the fuel mixture issuing from idle port ll passes through the perforated bailie 36 and is more thoroughly atomized. During the opening movement of the throttle valve, bailie 36 maintains its spaced relationship to the idle port and intercepts the fuel mixture from the idle port throughout the part throttle range.

Batile 35, having its pocket facing against the normal fiow oi air through the conduit, is so positioned as to catch the discharge from an wide open throttle position and a greater turbulence and more complete atomization o! the fuel mixture is achieved.

The shaping and arrangement of the turbulence producing ribs may be modified such as by providing flat or non-perforated ribs and the exclusive use of all such modifications as come within the scope of the appended claims is contemplated.

I claim:

1. In a carburetor, an induction conduit, a butterfly throttle pivoted therein, an idle port discharging into said conduit adjacent an edge of said throttle when closed, and a baille screen attached to said throttle valve side adjacent said port and projecting in the direction of closing movement of said edge relative to said port as to intercept and atomize the fuel emerging from said port throughout the part throttle range of said throttle valve.

2. In a carburetor, a downdraft induction conduit, a throttle disc pivoted therein, an accelerating nozzle discharging into said conduit above said throttle valve, an idle port discharging into said conduit adjacent an edge of said throttle valve when closed, said edge moving anteriorily relative to said port during the throttle opening movement, a foraminous baiile projecting posteriorily from said throttle edge for intercepting and atomizing the fuel discharged from said port in the part throttle range of said throttle valve, and a second foraminous baiiie projecting anteriorly from the opposite edge of said throttle valve for intercepting and atomizing the discharge from said pump.

AUGUST H. WASSMAN.

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