Carburettor for internal combustion engine

FIELD: engines and pumps.

SUBSTANCE: carburettor for an internal combustion engine comprises an inlet air nozzle, a diffuser, a mixing chamber, a throttle gate with a rotary axis and a lever, a float chamber, a fuel supply channel, a stop valve, a float with a rotary lever interacting with the stop valve and installed on the axis of the rotary lever of the float, the axis of the movable lever of the float is installed at the end of the rotary axis of the float chamber, is made eccentrically to the rotary axis of the float chamber and forms a single part with it. At the other end of the rotary axis of the float chamber there is a lever made outside the float chamber, which is connected by a hinged traction rod to the throttle gate lever.

EFFECT: increased accuracy of fuel level adjustment in a float chamber and simplified design of a carburettor.

2 dwg

 

The invention relates to engine, particularly to carburetors for internal combustion engines.

Known carburetor with electronic control for internal combustion engines, containing the float chamber, in which there is a secondary camera, soamsawali with the main chamber through a hole in one of the partitions. In the bypass hole of the carburetor is an electromagnetic valve which, depending on signals from the electronic unit can support different level of fuel in the secondary camera (see A.S. USSR №1302004 CL F02M 7/16 announced. 20.11.85, published. 07.04.87).

The additional camera complicates the design of the carburetor. In addition, the presence of two cameras in the carburetor increases the total volume of the float chamber, which leads to an increase of the dimensions of the carburetor.

Known the float chamber of a carburetor for an internal combustion engine, which allows you to adjust the level in the carburetor using the rotary screw and locknut. A feature of this design is the eccentric position of the rotary axis of the float arm relative to the axis of the adjusting screw. When turning the adjusting screw of the rotary axis of the float arm moves in a vertical direction, thereby altering the level of fuel in the float to the least. Adjusting the fuel level in the carburetor with the engine, the adjusting screw securely kantrida and the rotary axis of the float arm is fixed (see A.S. USSR №1196525 CL F02M 5/06 announced. 26.06.84, published. 07.12.85 bull. No. 45). However, when the engine is running the fuel level in the float chamber significantly changed (see VI) Carburetors "Ozone". The device, maintenance, repair / Under the scientific editorship Senographe. M.: Publishing house of the Third Rome, 2003, - 64 C., Fig. 16), which leads to increased fuel consumption, deterioration of toxicity, and lack of fuel consumption on mode power more than 90-95%.

To enrich the fuel mixture on the power settings 90-95% in the construction of the carburetor has been added to the device - econostat (ibid p.20-21).

The purpose of the invention is improving the control accuracy of the fuel level in the float chamber, simplifying the design of the carburetor.

In a carburetor for internal combustion engines, containing the air inlet pipe (1), diffuser (2), mixing chamber (3), the throttle (4) swivel axis (5) and lever (6), the float chamber (7), the channel leading fuel (8), shutoff valve (9), float (10) with a turning lever (11), interacting with shutoff valve and mounted on an axis (12) of the rotary lever of the float, which is located on the end surface to the company axis (13) the float chamber, made eccentric to its axis and forming with it a single item, on the other end of the rotary axis of the float chamber has a lever (14)is made outside of the float chamber, which is connected pivotally thrust (15) throttle lever (6).

The running axis of the float chamber of the swivel allows the process to rotate the axis of the float chamber around its axis.

The execution of a rotary axis of the float arm eccentric rotary axis of the float chamber allows for the rotation of the latter to move the rotary axis of the float arm in the vertical direction.

The location of the lever pivot axis of the float chamber on the outside of the float chamber allows you to control the turning axis of the float chamber on the outside of the carburetor.

Swivel the lever pivot axis of the float chamber with the throttle lever allows you to rotate the rotary axis of the float chamber when changing throttle position, i.e. when changing operating modes of the engine.

The carburetor works as follows. Air through the air inlet pipe 1 diffuser 2 enters the carburetor, where in the mixing chamber 3 is mixed with the fuel flowing from the nozzle and through the throttle valve 4 flows into the engine. Fuel enters the float chamber 7 through the inlet Kahn is 8 through a check valve 9, the flow through which is regulated by the lever 11 of the float 10. While reducing valve 9 is opened and the fuel level in the float chamber 7 is restored. When a change in the speed or load mode of the engine throttle valve 4 is rotated (opened), the throttle lever 6 changes its position, cooperating hinge rod 15, which rotates the lever 14, while rotating the rotary shaft 13 of the float chamber. During rotation of the latter, the axis 12 of the float arm 11 is lowered. Shut-off valve 9 is opened, the fuel level in the carburetor increases.

At the location of the axis of the lever 12 in the extreme upper position of the fuel level in the float chamber is minimal and corresponds to the preparation of the fuel mixture for minimum idle speed.

At maximum throttle the axis of the float arm 12 is lowered most deeply, the fuel level in the float chamber greatest and corresponds to the preparation of the fuel mixture in the power structure.

The implementation of the carburetor in the manner described above allows to improve the control accuracy of the fuel level. Adjusting the fuel level in the float chamber at maximum capacity when fully open throttle gives the possibility to exclude from the construction of the carburetor is a device for additional enrichment of the fuel mixture carburetor - econostat. The design of the carburetor is simplified.

Carburetor for an internal combustion engine, containing the air inlet pipe, a diffuser, a mixing chamber, a throttle valve with a rotary axis, and a lever, float chamber, channel, inlet fuel shutoff valve, a float with swivel lever interacting with shut-off valve and mounted on the rotary axis of the float arm, characterized in that in order to improve the control accuracy of the fuel level and simplify the design, the axis of the float chamber is made of rotary, the rotary axis of the float arm is located on the end of a rotary axis of the float chamber, is made eccentric rotary axis of the float chamber and forming with it a single item, on the other end of the rotary axis of the float chamber has a lever made outside of the float chamber, which is connected pivotally thrust with the throttle lever.



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: carburettor for an internal combustion engine comprises an inlet air nozzle, a diffuser, a mixing chamber, a throttle gate with a rotary axis and a lever, a float chamber, a fuel supply channel, a stop valve, a float with a rotary lever interacting with the stop valve and installed on the axis of the rotary lever of the float, the axis of the movable lever of the float is installed at the end of the rotary axis of the float chamber, is made eccentrically to the rotary axis of the float chamber and forms a single part with it. At the other end of the rotary axis of the float chamber there is a lever made outside the float chamber, which is connected by a hinged traction rod to the throttle gate lever.

EFFECT: increased accuracy of fuel level adjustment in a float chamber and simplified design of a carburettor.

2 dwg

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