Scheme of the main metering system of the carburetor and economizer
The econostat is located in the secondary chamber of the carburetor. In the diagram it is conventionally shown in the primary chamber.
1 – emulsion jet of economizer; 2 – emulsion channel of econostat; 3 – air jet of the main metering system; 4 – economizer air jet; 5 – fuel jet of economizer; 6 – needle valve; 7 – float axis; 8 – ball of the locking needle; 9 – float; 10 – float chamber; 11 – main fuel jet; 12 – emulsion well; 13 – emulsion tube; 14 – primary chamber throttle valve axis; 15 – spool groove; 16 – valve; 17 – Large diffuser; 18 – small diffuser; 19 – sprayer
Carburetor Idle System Diagram
1 – throttle body; 2 – primary chamber throttle valve; 3 – transition mode holes; 4 – hole adjusted by screw; 5 – air supply channel; 6 – mixture quantity adjustment screw; 7 – mixture composition (quality) adjustment screw; 8 – emulsion channel of the idle system; 9 – additional air adjustment screw; 10 – carburetor body cover; 11 - idling system air jet; 12 – idle system fuel jet; 13 – idle system fuel channel; 14 – emulsion well
Accelerator pump diagram
1 – valve screw; 2 – sprayer; 3 – fuel channel; 4 – bypass jet; 5 – float chamber; 6 – accelerator pump drive cam; 7 – drive lever; 8 – return spring; 9 – diaphragm cup; 10 – pump diaphragm; 11 – inlet ball valve; 12 – gasoline vapor chamber
Diaphragm trigger device diagram
1 – air damper drive lever; 2 – air damper; 3 – air pipe of the primary chamber of the carburetor; 4 – traction; 5 – starting device rod; 6 – diaphragm of the starting device; 7 – starting device adjustment screw; 8 – cavity communicating with the throttle space; 9 – telescopic rod; 10 – damper control lever; 11 – lever; 12 – primary chamber throttle valve axis; 13 – lever on the primary chamber flap axis; 14 – lever; 15 – secondary chamber throttle valve axis; 16 – secondary chamber throttle valve; 17 – throttle body; 18 – Secondary chamber throttle control lever; 19 – traction; 20 – pneumatic drive
Secondary chamber throttle valve pneumatic drive diagram
1 – pneumatic drive jet located in the primary chamber diffuser; 2 – damper control lever; 3 – lever rigidly connected to the primary chamber throttle valve axis; 4 – lever limiting the opening of the secondary chamber throttle valve; 5 – pneumatic drive jet located in the secondary chamber diffuser; 6 – lever connected to lever 9 via a spring; 7 – secondary chamber throttle valve axis; 8 – pneumatic drive rod; 9 – secondary chamber throttle control lever; 10 – channel for supplying vacuum to the pneumatic drive; 11 – rod bushing; 12 – secondary chamber throttle valve pneumatic drive
Until 1974, VAZ-2101, -2102 cars were equipped with 2101-1107010 carburetors (the number is cast on the lower flange of the carburetor body). From 1974 to 1976. (inclusive) these vehicles were equipped with 2101-1107010-02 carburetors, and from 1977 to 1980, 2101-1107010-03 carburetors were installed.
All these carburetors had basically the same design and differed in the diameters of some jets, and the first two carburetors also had a float chamber imbalance valve installed.
Since 1980, the 210-1107010-20 carburetor (type "Ozone") has been used on cars. It differed from the old carburetors in the diameters of the jets, the presence of a pneumatic drive for the secondary chamber throttle valve and the introduction of a branch pipe for vacuum extraction to the vacuum regulator of the ignition distributor.
In the early 80s, the 2105-1101010-10 carburetor was also produced without a vacuum take-off pipe to the vacuum regulator of the ignition distributor. It was supplied as spare parts for installation on engines that had an R125 ignition distributor without a vacuum regulator.
This chapter describes the 2105-1107010-20 carburetor, since it was installed on most cars, and old carburetors have not been produced for a long time.
Carburetor 2105-1107010-20 emulsion type, two-chamber, with falling flow. The carburetor has a balanced float chamber, a system of suction of crankcase gases behind the throttle valve.
The carburetor has two main metering systems (see fig. Diagram of the main metering system of the carburetor and economizer) primary and secondary mixing chambers, idle system (see fig. Carburetor idle system diagram) primary mixing chamber, secondary mixing chamber transition system, enrichment device (econostat), diaphragm accelerator pump (see fig. Accelerator pump diagram) with mechanical drive and diaphragm trigger (see fig. Diaphragm trigger device diagram) cold engine start. The secondary chamber throttle valve has a pneumatic drive (see fig. Diagram of the pneumatic drive of the secondary chamber throttle valve).
Calibration data for carburetor 2105-1107010-20
Indicators | 1st camera | 2nd camera |
| Diffuser diameter, mm | 21 | 25 |
| Sprayer calibration number | 3,5 | 4,5 |
| Main fuel jet diameter, mm | 1,07 | 1,62 |
| Main air jet diameter, mm | 1,70 | 1,70 |
| Emulsion tube calibration number | F15 | F15 |
| Idle fuel jet diameter, mm | 0,50 | 0,60 |
| Idle air jet diameter, mm | 1,70 | 0,70 |
| Accelerator pump nozzle diameter, mm | 0,40 | – |
| Accelerator pump bypass jet diameter, mm | 0,40 | – |
| Accelerator pump performance for 10 full strokes, cm³ | 7±25% | |
| Diameter of fuel jet of economizer, mm | – | 1,50 |
| Diameter of the economizer air jet, mm | – | 1,20 |
| Diameter of the emulsion jet of the economizer, mm | – | 1,50 |
| Air jet diameter of the starting device, mm | 0,70 | |
| Distance of float from carburetor cover with gasket, mm | 6,5±0,25 | |