SU1747733A1 - Carburetor for internal combustion engine - Google Patents

Abstract

Summary of the invention 1 in the flow channel (2) of the housing (1) between the wall (9) and the central body (3), radial-spiral partitions (8) are installed, having transverse grooves (17), forming the outlet windows of the atomizer and communicated through radial fuel channels (18) with a stop-distributing chamber

Description

This invention relates to mechanical engineering, in particular to carburetors for an internal combustion engine.

Carburetors for an internal combustion engine are known, comprising a housing with a flow channel and diffusers and a throttle valve located therein, a float chamber and metering systems communicated with the latter, sprayers of which are made in diffusers.

However, such carburetors do not provide for the preparation of a uniform fuel-air mixture due to poor atomization of the fuel and its mixing with the air passing through the flow channel.

Carburetors for an internal combustion engine are also known, comprising a housing with a flow channel, a central body in the latter, a float chamber communicating with the latter.

a fuel distribution chamber made in the central body and having a fuel jet, a nozzle with exit ports communicating with the fuel distribution chamber behind the fuel jet, a throttle element and a metering needle having a profiled end member capable of interacting with the fuel jet for metering fuel supply, and kinematically associated with the throttle element.

However, in such carburetors, the supply of fuel from the sprayer is carried out from its outlet windows directly into the air stream, and therefore the fuel enters the latter in the form of droplets, evaporation and mixing with the latter is difficult, and the fuel-air mixture prepared by the carburetor is not high enough. homogeneity.

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The purpose of the invention is to improve the quality of the prepared air-fuel mixture.

The goal is achieved by the fact that in the carburetor for an internal combustion engine, comprising a housing with a flow channel, a central body located in the latter, a float chamber, connected to the latter fuel distribution chamber, connected to the central body and having a fuel jet. a tolly-distributing chamber behind the fuel jet, the throttle element and the dosing needle, placed in the central body, have-1 shaped profiled end element, made with the interaction with the fuel jet for dispensing the fuel supply, and kinematically connected with the throttle element, radial-spiral partitions are installed between the central body and the wall of the flow channel, having radial fuel channels communicating with the distribution chamber, the throttle element is designed as a rotary dampers installed in the flow channel to the central body relative to the air flow, and the sprayer outlet windows are made on the surfaces of radial-spiral partitions in the form of transverse grooves communicated with radial fuel channels.

Fig. 1 shows schematically a described carburetor for an internal combustion engine, a section; in fig. 2 shows section A-A in FIG. one.

The carburetor for an internal combustion engine includes a housing 1 with a flow channel 2, located in the latter central body 3, a float chamber 4, a fuel distribution chamber 5 made in the central body and communicated through the fuel nozzle 6 and channel 7 with the float chamber 4, radially-spiral partitions 8, mounted between the central body 3 and the wall 9 of the flow channel 2, the throttle element, made in the form of a butterfly valve 10 and installed in the flow channel 2 to the central body 3 relative to the flow during spirit, and the metering needle 11 disposed in the central body 3 and having a profiled end member 12 adapted to cooperate with the fuel jet 6. projecting from the central body of the metering needle stem 11 has a groove 13, which includes a hinge 14 of the lever 15 is rigidly

mounted on the drive roller 16 of the rotary valve 10. On the radial-spiral partitions 8 made of transverse grooves 17, forming the output window of the dispenser and connected using radial fuel channels 18 with the distribution chamber 5.

The carburetor works as follows.

When the engine is running, an air flow in an amount controlled by the position of the rotary valve 10 and dependent on the rotational speed of the motor shaft passes through the flow channel 2, the flow swirling with the radial-spiral partitions 8, and a vacuum is created in the zone of the transverse grooves 17. Under the influence of the latter, the fuel comes from the float chamber 4 and, having passed the fuel channel 7 and the nozzle 6, the fuel distribution chamber 5 and the radial fuel channels 18 and flowing out of the transverse grooves 17, spreads over the surface of the partitions 8, the amount of incoming fuel depends on the vacuum pressure and is simultaneously regulated the flow section of the fuel jet 6, a variable end element 12 of the metering needle 11. whose position is set by the lever 15 depending on the angle of opening of the rotary valve 10. Under the influence the swirling flow film of the protruding fuel is crushed with simultaneous intensive evaporation of the fuel so that intensive mixing with the air of the evaporated fuel and the resulting small particles of liquid fuel occurs, and a highly uniform air-fuel mixture is formed at the exit of the flow channel 2, in which all the fuel is practically in the steam phase, so that the combustible mixture prepared by the carburetor burns in the engine cylinder with high efficiency.

Claims (1)

A carburettor for an internal combustion engine, comprising a housing with a flow channel located in the latter central body, a float chamber communicated with the last fuel distribution chamber, made in the central body and having a fuel nozzle, an atomizer with outlet windows communicating with the fuel distribution chamber behind the fuel nozzle, the throttle element and the metering needle placed in the central body, having a profiled end element adapted to Procedure with the fuel jet for metering the fuel and kinematically associated with the throttling element, characterized in that, in order to increase the quality of the prepared fuel mixture between the central body and the wall of the flow channel installed Angular helical baffle having a radial fuel channels communicated with toplivoraspreYu I X / HH / I I 1 1 g i i ifP one the divider chamber, the throttle element is made in the form of a rotary valve installed in the flow channel to the central body relative to the air flow, and the outlet windows of the atomizer are made on the surfaces of the radial-spirical partitions in the form of transverse grooves communicated with the radial fuel channels.