The air-fuel emulsion enters the small and large carburetor diffusers along the horizontal channel.
Power mode economizer
In transient conditions, with an increase in vacuum behind the throttle valve, fuel is taken from the float chamber through ball valve 3 (see picture), which is closed while the diaphragm is held by vacuum in the throttle space. Then, through the enrichment channel, an additional amount of fuel through the enrichment idle jet is supplied to the idle systems, enriching the combustible mixture.
Power mode economizer:
1 - enrichment idle jet;
2 - enrichment jet of the main dosing system;
3 - economizer ball valve;
4 - vacuum supply hose.
As the throttle valve opens, the vacuum decreases somewhat and the diaphragm spring opens valve 3 even more. An additional amount of fuel passes through the economizer jet through the idle enrichment jet 1 and enrichment jet 2 of the main metering system and is fed into the idle systems and the main metering system. enriching the combustible mixture.
Econostat
The econostat turns on at full engine load at speeds close to maximum, with a wide open throttle. Fuel from the float chamber is fed through the econostat jet to the injection tube, which sprays the fuel into the mixing chamber, enriching the combustible mixture.
Econostat:
1 - econostat injection tube;
2 - plug screw;
3 - fuel supply pipe;
4 - fuel filter;
5 - needle valve.
Accelerator pump
The accelerator pump has a mechanical drive. With the throttle valve closed, spring 3 (see picture) takes the diaphragm 2 back, which leads to filling the pump cavity through the check ball valve 7. When the throttle valve is opened, the cam acts on the pump drive lever, and the diaphragm pumps fuel through the ball valve 4 and the atomizer 5 into the carburetor mixing chamber. enriching the combustible mixture. Excess fuel is drained into the float chamber through the drain channel.
Accelerator pump:
1 - drive lever;
2 - diaphragm;
3 - spring;
4 - ball valve for fuel supply;
5 - atomizer;
6 - mixing chamber;
7 - check ball valve;
8 - vacuum supply channel.
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