DE518454C - Carburetors for internal combustion engines - Google Patents

Description

Carburetor for internal combustion engines The invention relates to carburetors for Internal combustion engines. The purpose of the invention is to make such carburetors fire-proof.

Fireproof carburetors are known per se. With the known carburetors you have arranged a housing that could be hermetically sealed, and the carburetor placed in this housing. With the airtight closure of the housing you have connected to a termination of the gasoline supply.

Attempts have also been made to make the carburetor fireproof make that one. without an enveloping housing on the carburetor itself the possible air and to close gasoline supply points by means of terminating members coupled to one another sought. The known carburetors of this type, however, had a design that aimed at Unlikely to guarantee success. According to the invention, this makes a carburetor fire-safe made that the throttle body to shut off the air and gasoline supply in such a way are coupled together and designed that the air supply openings through a common closing movement all shut off air and gasoline-tight at the same time can be so that when a carburetor fire breaks out, any air admission and any fuel leakage from the carburetor is definitely prevented.

Further features of the invention emerge from the following description the invention. In the drawing is an inhaler carburetor according to the invention as Embodiment shown.

Fig. I shows a vertical longitudinal section through the carburetor, Fig. 2 a vertical cross-section through the carburetor and part of the float tank, Fig.3 a horizontal longitudinal section through the carburetor and float tank.

The fuel nozzle # l- and the blow pipe are located in the carburetor body i 3, the legs 3 'and 3 "of which can be locked against the outside air by means of a rotary valve q are.

On the float tank 5 sits an air tap 6, which allows the Fuel supply to the nozzle: 2 by changing the pressure in the float chamber rules. When the valve 6 is closed, the float connection prevails in the float area 7 same pressure as in the carburetor body. By sucking in air through the tap 6 the pressure in the float vessel can be increased. If you shut off tap 6 completely, so the float tank is immediately sealed off from the outside air.

The air throttle valve 8 is at the outer end of the carburetor body i arranged. It not only closes airtight, but also gasoline-tight as a result of it conical ground seat. A cam 9 is used to adjust the valve B. It sits on the same oscillating shaft as the rotary valve 4 to the Completion of the blowpipe. From the shaft io, which can be rotated by means of the crank ii, can lead to any connection, not shown, to the tap 6. The connection can also proceed from the linkage acting on the crank i i. It is fundamental same where the movement of the cock G is derived, if only the closure of the Tap 6 of the air throttle valve 8 and the blowpipe 3, 3 ', 3 "takes place simultaneously.

Instead of the valve, cock or slide shape shown, any other suitable tight closing organs can also be used.

In spray gasifiers, where z. B. the float tank with a continuously open breakthrough to the atmosphere is provided for usually open tap, like tap 6 (Fig. 2), which exactly like the cock 6 in the event of a carburetor fire at the same time as the other closing organs is closed.

If the air throttle is between the fuel nozzle and the engine flange, then there is a special shut-off valve on the air inlet port, which is only available in the Closed in case of fire.

If the guide of the float needle is open to the outside, it can be by means of a permanently closed hood 12 are sealed.

It should be obvious that in the event of a carburetor fire the arrangement described provides a completely airtight and gasoline-tight seal of the carburetor housing against the outside air is possible, so that in the event of a fire can only burn as much gasoline as, for example, before closing the valves to the outside has streamed. However, a carburetor fire is practically impossible. Of course In a known manner, the gasoline flow can also be shut off at the same time as the valves will.

Claims (3)

PATENT CLAIMS: i. Carburetor for internal combustion engines with several Air supply points, all controlled by throttle bodies coupled to one another are, characterized in that the throttle bodies are coupled to one another in this way and are designed that the air supply openings by a common closing movement all and at the same time can be shut off airtight and gasoline-tight, so that when a carburetor fire breaks out, every air inlet and every fuel outlet from the carburetor is prevented with certainty. 2. Inhaler carburetor according to claim i, characterized in that in front of the air ducts (3 '; 3 ") are provided as a closing body rotary valve, which on a` common Axis sit, and that on the latter a cam for adjusting a before Main air connection arranged poppet valve is arranged (Fig. 3). 3. Carburetor according to claim i or 2 -with a float tank which leads to the outside air Has a bore with a closure body, characterized in that this too Closing body is coupled to the system of the throttle body. q .. carburetor after Claim i to 3, characterized in that the fuel supply valve also has the system of the air seal body is coupled in such a way that its termination together finite the conclusion of the latter takes place.