SU1698474A1 - Carburetor-mixer for gas internal combustion engine - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to an engine-building. The aim of the invention is to improve the accuracy of gas metering in the whole range of load characteristics, which is provided by the communication of gas nozzles 5 and 6 of primary and secondary chambers 1 and 3 with channel 8 for supplying gas through additional gas supply lines. channels 9 and installation in the gas supply channel of the nozzle 6 of the secondary chamber 3 of adjustable throttle 7, kinematically connected with the actuator of the carburetor throttle valves and made with the possibility of one Modern control of the throttle valve 2 of the primary chamber and the adjustable throttle 7 about 1 sludge.

Description

The invention relates to mechanical engineering, in particular to carburetor mixers for gas engines of internal combustion.

A carburetor-mixer for an internal gas combustion engine is known, containing primary and secondary mixing chambers with throttle valves installed therein, kinematically connected with each other with the possibility of sequential opening, and gas nozzles located in the throttle space of the mixing chambers and communicating with the channel gas supply „

The disadvantage of such a carburetor is the impossibility of ensuring the optimum composition of the mixture over the entire range of load characteristics, which leads to an increase in consumption.

fuel and engine exhaust emissions.

The purpose of the invention is to improve the accuracy of gas metering over the entire range of load characteristics.

The drawing shows a schematic diagram of a carburetor-blender for a gas engine internal combustion

The carburetor-blender includes a primary flow channel 1 of the primary chamber with a throttle valve 2, a main flow channel 3 of the secondary chamber with a throttle valve 4, a gas nozzle 5 of the primary chamber, a gas nozzle 6 of the secondary chamber, a throttle 7 in the gas supply channel 8, channel 9 gas supply to the nozzle 5, elements 10 - 12 kinematic interconnection of throttle valves.

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Carburetor-mixer works as follows.

At idle, the throttle valve 4 of the secondary chamber is fully closed. The throttle valve 2 of the primary chamber is ajar by an adjusting element (not shown) by an amount that provides the necessary minimum rotational speed of the engine crankshaft, the throttle 7 is ajar by an adjusting element (not shown) by an amount that ensures the minimum toxicity of the exhaust gases. At the same time, the gas entering the carburetor-mixer channel 8 from the gas system of the car (not shown), is pre-mixed with air entering this channel from the main flow channel 3 through nozzle 6 and the gaps between the edges of the throttles 7 and the walls of the channel 8, is fed into the engine through the channel 9, into the nozzle 5 and the main flow channel 1, where it is once again mixed with atmospheric air.

As the throttle valve 2 opens, as the air flow through the main flow channel 1 increases, the gas flow through the nozzle 5 increases. At the same time, the increase in the opening angle of the throttle 7 due to kinematic interconnection elements 10 and 11 increases the flow of air from the channel 3 through the nozzle 6 into channel 9,

A carburetor-blender for a gas engine in an internal combustion engine containing primary and secondary mixing chambers with throttle valves installed in them, kinematically connected with each other with the possibility of sequential opening, and gas nozzles located in the throttle space of the mixing chambers and communicating with the channel gas supply, characterized in that, in order to improve the accuracy of gas dosing over the entire range of load characteristics, the gas nozzles of the primary and secondary chambers are communicated with a channel for supplying gas through additional gas supplying channels, while in the additional gas supplying channel of the nozzle of the secondary chamber an adjustable choke is installed, kinematically providing the required flow characteristics of the 35 air-controlled air blower. Full opening of the throttles 7 before opening the throttle valve 4 of the secondary chamber allows for a smooth entry of the secondary chamber into operation and the necessary matching of the gas flow through the nozzle 6 to the air flow through the main flow channel 3 of the secondary chamber as the throttle valve 4 increases.

Claims (1)

Invention Formula A carburetor-blender for a gas internal combustion engine, containing primary and secondary mixing chambers with throttle valves installed in them, kinematically connected with each other with the possibility of sequential opening, and gas jets located in the throttle of the mixing chambers and communicated with the gas supply channel, characterized in that, in order to increase the accuracy of gas dosing over the entire range of load characteristics, the gas nozzles of the primary and secondary chambers are communicated with the gas supply channel through the additional gas supply channels, while in the additional gas supply channel of the nozzle of the secondary chamber an adjustable choke is installed, kinematically connected with the throttle drive testing on all load modes due to proper selection of arms of elements 10 - 12 of the kinematic interconnection of throttle valves and the required depletion of the mixture with an additional 40 carburetor damper flaps and configured to simultaneously control the throttle valve of the primary chamber and the adjustable choke