SU905505A1 - Vortex-type carburettor - Google Patents

Description

(S) VORTEX TYPE CARBURETTOR

I

FIELD OF THE INVENTION The invention relates to engine construction, in particular, to devices for preparing a combustible mixture in carburetor internal combustion engines.

A vortex type carburetor for an internal combustion engine is known, comprising a mixing chamber with air supply through tangential channels made in a radial wall, shaped end walls with an opening for venting the combustible mixture in one of them, a device for throttling tangential channels and a fuel metering system l.

A disadvantage of the known carburetor is that it contains a structurally complex system of axially metering fuel with the obligatory presence of kinematic connections and the interaction of many parts to obtain the necessary composition characteristics of the combustible mixture throughout.

range of engine operating conditions, but the structural complication of the carburetor leads to technological instability of the adjustment characteristics of the composition of the combustible mixture and operational unreliability, which reduces the possibility of ensuring the optimum composition of the combustible mixture in the entire range of operating conditions of the engine.

to

The purpose of the invention is to simplify the design and ensure the optimum composition of the combustible mixture in the entire range of engine operating modes.

This goal is achieved by

Claims (2)

5 that the mixing chamber is provided with a fuel supply channel, and the throttling device is designed as a slide valve, the output section of the fuel supply channel of the slit channel is made in the form of a variable section groove located in the radial wall of the mixing chamber along the arc of its inner circumference and relative to the tangential channels the possibility of their simultaneous throttling valve. The radial wall of the mixing chamber is made integral so that the fuel feed channel is located in a separate removable element and the latter is attached to the radial wall by means of a spring and gasket. - FIG. 1 shows a carburettor of theirs | 5th type, general view; on ig. 2 section aa and bb on u. J. The carburetor contains a mixing chamber, which is formed by a radial wall 1 with tangential channels 2 for supplying air and end-shaped profiled walls 3 and with an outlet orifice k for draining the combustible mixture; A device for throttling tangential channels, made inside the mixing chamber, in the form of spool-type dampers 5, which are rigidly fixed to the end profiled wall 3, capable of being rotated on rolling bearings 6 under the influence of the control lever; fuel metering system, including a fuel supply channel 8 with a variable cross section groove 9 and a maximum flow orifice nozzle 10, which are made in the body of a removable element 11 attached to the radial wall 1 by a spring 12 and a sealer 13; We meter the fuel to the float chamber through a flexible fuel line. The process of preparing a combustible mixture in a carburetor of the vortex type is carried out as follows. The air after the air cleaner enters the mixing chamber through the tangential channels 2 under the action of the discharge generated by the operation of the internal combustion engine. The fuel enters the mixing chamber under the action of the same discharge from the float chamber (not shown) through a flexible fuel line into the fitting through the maximum flow jet, the fuel supply channel 8 and the variable section groove 3Dosing air and fuel entering the mixing chamber is realized overlapping the output sections of the 4 tangential channels 2 and the grooves of variable cross section 9 with a common throttle valve 5 of the spool type, which is designed to rotate when acting on the control lever Laziness 7. In the mixing chamber, the fuel and air are intensively mixed in a swirling vortex flow and in the form of a highly homogeneous combustible mixture is diverted through an opening in the profiled end wall from the outlet to the combustion chambers. .- jk The carburetor is equipped with a fuel metering system that eliminates the presence of a kiempetic connection and provides a local curve of the adjustment characteristics of the effective composition of the combustible mixture, and this combined with the homogenization of the combustible mixture in a swirling eddy flow implies a highly efficient use of a carburetor for internal combustion engines of internal combustion gases increases their efficiency and reduces harmful emissions into the atmosphere. Claims 1. A carburetor of a dry type for an internal combustion engine, comprising a mixing chamber with air supply through tangential channels made in the radial wall, profiled end walls with an opening for venting the combustible mixture in one of them, a device for throttling tangential channels and a metering system fuel, characterized in that, in order to simplify the design and ensure an optimal mixture composition in the entire range of engine operating modes, the mixing chamber is equipped fuel conductive channel, and the device for throttling formed as a valve spool type wherein the output portion the fuel present channel formed as a groove of variable section located in the radial wall of the mixing chamber through an arc of its inner circumference, and relative tangential channels with the possibility of simultaneous throttling valve. 2. The carburetor of claim 1, wherein the radial 1 wall of the mixing chamber is made composite so that the fuel supply channel is located in a separate removable element and the latter is J Jl fixed to the radial wall during the breaking of the stem and sealant. Sources of information taken into account in the examination 1. USSR author's certificate ff 562669, cl. F 02 M 17/00, 1975. L 4.JL 12 bv 12