SU136119A1 - Carburetor - Google Patents

Description

Prior to the present invention, carburetors with cup throttled zolotoyeks intersecting the axis of the mixing chamber, with windows on non-cylindrical surfaces located opposite each other, regulating the cross sections of the air passage channels and the air-fuel mixture, with inserts inside the cup spools having fuel atomizers were known .

New and original in the proposed carburetor is the presence of a spool of two coaxial vitreous sleeves with a common synchronizing drive for turning them towards each other.

Such a carburettor device permits a uniform and symmetrical change in the cross section of the channels to obtain the most favorable character of the vacuum flow in the main carburetor metering system.

New in the invention is also the fact that the size of the windows in the glass bushings of the spool and the size of the corresponding air passage channels are larger than the size of the windows and the corresponding channel for the fuel-air mixture.

In order to automatically control the throttle valve, pneumatic or thermal sensors are used in the invention.

FIG. 1 shows a horizontal section along the axis of a carburetor with a spool in the form of two tubular sleeves.

FIG. 2 is a vertical section of the carburetor shown in FIG. one.

FIG. 3 is a side view of the carburettor with a mechanism for controlling the spool.

FIG. 4 - insert type. FIG. 5 - view of the spool in the form of two tubular sleeves. FIG. 6 is a horizontal section through a carburettor with a pneumatic sensor for automatic control of a choke valve. FIG. 7 is a horizontal section through a carburetor with a thermal sensor for automatic control of the choke valve.

No. 136119-2 FIG. 8 is a vertical section of a carburetor with a slide valve, making a translational motion. FIG. 9 - view of the spool.

In the mixing chamber / there is a channel 2 for the passage of the fuel-air mixture and a channel 3 for the air intake. Channel 5 has a larger section than channel 2. The mixing chamber is perpendicular to the axis of the channels. 2 and there is a cylindrical insert 4 with openings corresponding to the openings for passing the air-fuel mixture and air inlet into the mixing chamber.

An air funnel 5 is installed inside the insert where the injection device is placed b. Box 4 is enclosed in two glass bushings 7 and 8, having windows 9-9 and 10-W, opposed to each other on the same axis. The size of the windows corresponds to the dimensions of the channels: a throughput hole for the mixture and an inlet for the air in the mixing chamber.

The glass sleeves 7 and S are fixedly fixed to the shaft I and 12, respectively. Shafts 11 and 12 with the glass sleeve fixed on them allow rotary movements.

Shafts 11 and 12, respectively, have levers 13 and 14. Levers 13 and 14 are connected to guide ring 17 by means of grids 15 and 16, which can move freely along the rod 18. The spool valve cover 19 has openings 20 and 21.

By means of a rod 18 having a thread at the end passing through the threaded hole 20, it is possible to make an adjustment of the rotational speed at idle. When moving, the rod 18 acts through the rods 15 and 16 and the levers 13 and 14 on the shafts 11 and 12, causing them, and therefore the cup sleeves fixed on them, to make pivotal movements, but in the opposite direction, as shown by arrows in FIG. . 3. Thus, different degrees of opening or closing of the channels for the passage of the mixture and the intake of air occur.

The windows in both glass bushes for passing the mixture and air intake may have a different configuration (for example, square, round, etc.).

A membrane box 22 is mounted on the mixing chamber /, the inner space of which is connected to the mixing chamber / through the channel 23, which ends at the narrowest point of the suction channel in the insert 4.

When a suction channel is formed at the narrowest point of the suction channel in the opening of the channel 23, the membrane M will deflect, push the spring 24, move the connecting rod 25 and through the lever 26, mounted on column 27, pull 28, turn the throttle valve 29 in the direction of the arrow and open the channel for air intake. Depending on the movement of the sleeve bushing 7, the position of the spool 29 will also depend, as a result of which the automatic intake of air takes place.

A thermostat 30 is attached to the mixing chamber 1. It is connected to the exhaust pipe of the engine by pipeline 31. During the operation of the engine, the pipeline is heated and the heated air is supplied to the thermostat. Spiral 32 of bismuth with its ends attached to the shaft 33 and the thermostat cover. The lever 34 sitting on the shaft 33 is connected to the spool 29 by means of rod 35 and a finger 36. When heated, the coil is deformed and through the lever 34 and 35 rotates the valve 29, which, when the thermostat is cold, completely or partially blocks the air inlet and at the same time prepares the tubular sleeve 7

for passing the mixture from the idle position to the starting position.

Channel 3 for air intake in the mixing chamber 1 and the corresponding opening of the insert 4 and the vitreous sleeve 7 are larger than the hole dripping 2 for the mixture to pass, therefore the resulting section for air intake is always larger than for the mixture to pass. In addition, the air inlet opening opens earlier than the mixture opening. This advance is necessary to adjust the carburetor when the engine is running at low speed and at partial load.

The air enters channel 57 through the opening 38, the mixture passes through the channel and the outlet opening 39. In the cylindrical channel 40, the hollow valve 41 mixes up and down with a flexible shaft, overcoming the elasticity of the spring 42.

A needle 43, a nozzle that can be installed in various positions, is placed inside the hollow spool. In the carburetor case there is a sleeve 44, an insert 45 is fixed on it with the help of bolts, which passes through channel 57 and has an opening 46 aligned with channel 57. In the lower part of the insert 45 there is an air chamber 47, which through opening 48 communicates with the atmosphere. In chamber 47, there is a nozzle 49 screwed from above into the sleeve 44. A needle 43 passes through the nozzle.

The upper end of the nozzle 49 enters the nozzle 50 fixed in the wall of the insert 45, so that air can pass between the upper cap of the nozzle 49 and the lower end of the nozzle 50 and provide intensive spraying of the fuel. To regulate the air in the spool 41, enclosing the insert 45, there are windows 51 and 52, the cross section of which must be equal to or slightly larger than the cross section of the channel 57. The window 51 regulating the flow of air must be located above the window 52 to pass the mixture. This is done so that at all positions of the spool 41, the cross section of the air inlet opening, opened by means of the window 51, is larger than the cross section of the opening for passing the mixture, which is located on the opposite side and opened by means of the window 52.

Instead of positioning the air inlet window 51 higher than the window 52 for passing the mixture, it is possible to make both cuts at the same height, but window 51 can make more window 52. In this case, the input 38 and the output 39 of the channel 37, and the channel inlet and outlet in box 45 should be made different across the section and in accordance with the size of the spool windows. The channel in box 45 is recommended to be tapered, i.e., the end of the hole, facing 38 of channel 57, be made narrower and gradually spread out in the opposite direction. Windows 51 and 52 can have any shape.

Subject invention

1. A carburetor with an orifice cup valve, intersecting the axis of the mixing chamber, provided with windows on the cylindrical surface of the slide that regulate the cross section of the air passage channels and the fuel / air mixture, with a spray insert inside the spool, characterized in that it is uniform and symmetrical changes in the cross-section of the channels to ensure the most favorable character of the flow of the vacuum and the main metering system of the carburetor, throttle cup oil K is made in the form of two coaxial glass sleeve with a common synchronizing drive for counter-rotational or translational movement of them when the channels are blocked.

- 3 - # 136119

2. The form of the carburetor according to claim 1, characterized in that the windows in the stacked bushings of the spool and the corresponding air passage channels are made larger than the window and the channels for the air-fuel mixture;

3. In the carburetor on the PP. 1 n 2 use of pneumatic and thermal sensors for automatic control of the choke valve.

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FIG. 2

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