Scheme of carburetor "Ozone"
1 – screw for adjusting the stroke of the inlet valve of the accelerator pump; 2 – carburetor cover; 3 – fuel jet of the transition system of the second chamber; 4 – air jet of the transition system; 5 – economizer air jet; 6 – fuel jet of economizer; 7 – main air jet of the second chamber; 8 – emulsion jet of economizer; 9 – pneumatic drive of the second chamber throttle valve; 10 – small diffuser; 11 – jets; 12 – accelerator pump discharge valve; 13 – accelerator pump nozzle; 14 – air damper; 15 – main air jet of the first chamber; 16 – starting device jet; 17 – idle air jet; 18 – Automatic starting device; 19 – electromagnetic valve with idle fuel jet; 20 – fuel supply needle valve; 21 – fuel filter; 22 – fuel supply nipple; 23 – float; 24 – idle speed system factory adjustment screw; 25 – main fuel jet of the first chamber; 26 – adjusting screw for the quality of the working mixture; 27 – adjusting screw for the working mixture composition; 28 – first chamber throttle valve; 29 – float chamber body; 30 – second chamber throttle valve; 31 – throttle body; 32 – emulsion tube; 33 – main fuel jet of the second chamber; 34 – accelerator pump bypass valve; 35 – accelerator pump inlet valve; 36 – accelerator pump drive lever.
Description of the design
The VAZ-2106 car is currently equipped with the Ozone carburetor model DAAZ 2107-1107010-20. The VAZ-21065 car is equipped with the DAAZ 21053-1107010 carburetor (a model based on the Solex carburetor family).
The Ozone carburetor is an emulsion type, two-chamber, with a falling flow. It has one balanced float chamber, two main metering systems, an enrichment device (econostat) in the second chamber, an autonomous idle system, transition systems of the first and second chambers, a diaphragm accelerator pump with a sprayer in the first chamber, an electromagnetic shut-off valve of the idle system, a slide valve device for removing crankcase gases into the throttle space, a pneumatic drive of the throttle valve of the second chamber. Control of the air damper of the first chamber is manual, with a cable drive. After starting the engine, the damper is automatically opened by a diaphragm-type starting device under the action of a vacuum in the intake manifold. The carburetor is equipped with a vacuum take-off nipple for controlling the ignition advance regulator.
Fuel is supplied to the carburetor through a mesh filter and a needle valve. The valve is mechanically connected to the float and maintains a certain level of fuel in the float chamber.
Information copied from the portal [VAZbook.ru]
From the float chamber, fuel enters through the main fuel jets (first and second chambers) into emulsion wells and emulsion tubes, where it mixes with air entering through the main air jets. The fuel-air emulsion enters through sprayers into the small and large diffusers of the carburetor.
The idle fuel channel is closed by an electromagnetic shut-off valve after the ignition is turned off. The normal state of the valve under voltage is open.
The idle system takes fuel from the emulsion well of the first chamber. Fuel passes through the idle jet, structurally combined with the electromagnetic shut-off valve, and mixes with air entering through the idle air jet and the openings of the transition system of the first chamber. The resulting emulsion is fed through two channels (one has a calibrated opening - a jet, and the other - an adjustment screw, otherwise called a quality screw) to the opening blocked by the needle of the quantity screw, where it is additionally mixed with air and then through the emulsion opening enters the intake manifold. The composition of the mixture is regulated by the quality screw.
With partial opening of the throttle valves (before the main dosing system is put into operation) the fuel-air mixture enters the chambers through transition holes - two in each chamber.
The econostat provides fuel supply directly from the float chamber to the econostat sprayer, which is located in the diffuser of the second chamber. The econostat is activated in maximum power modes, additionally enriching the working mixture.
The accelerator pump is a diaphragm type, with a mechanical drive from the axis of the throttle valve of the first chamber. When the valve is opened sharply, a portion of fuel is injected through the sprayer into the first chamber of the carburetor, enriching the mixture. The pump is equipped with ball valves. One valve - a check valve - is located in the channel connecting the float chamber with the cavity of the accelerator pump. It opens when the pump cavity is filled with fuel and closes when the diaphragm pumps fuel. The other valve is located in the sprayer. It opens under the pressure of the pumped fuel and closes under the weight of the ball as soon as the fuel supply stops. Excess fuel during pumping flows through the bypass jet back into the float chamber.
The pump performance depends on the cam profile, the diameter of the bypass jet hole, the profile and length of the adjustment needle in the bypass jet channel. The accelerator pump is not subject to adjustment during operation.
The starting device consists of an air damper, an air damper control lever, a telescopic rod, a throttle drive rod, a diaphragm mechanism and a throttle control drive. When the drive handle ("choke") is pulled from the driver's seat, the air damper closes and the first chamber throttle valve opens by 0.7–0.8 mm (starting gap). At the first flashes in the cylinders, the vacuum behind the throttle valve is transmitted behind the diaphragm, which opens the air valve through the rod and rod. The maximum value of the valve opening is regulated by the diaphragm stop screw, located under the screw-plug.
Attention! We recommend that all repair and adjustment work on the carburetor, related to its partial disassembly, and therefore requiring cleanliness and accuracy, be carried out on a removed carburetor. Before disassembling the carburetor, use a small, hard brush with non-falling hair, moistened with gasoline or kerosene, to remove dirt from its outer surface. It is convenient to use an aerosol can "for washing the carburetor" with a special composition for this purpose. The rag used should be clean and not leave fibers and threads.
Calibration data for the DAAZ 2107-1107010-20 carburetor
| Parameters | First camera | Second camera |
Diameters, mm: | ||
| 22 | 25 |
| 28 | 36 |
| 1,12 | 1,5 |
| 1,5 | 1,5 |
| 0,5 | 0,6 |
| 1,7 | 0,7 |
| – | 1,5 |
| – | 1,2 |
| – | 1,5 |
| 0,7 | – |
| 1,5 | 1,2 |
| 0,4 | – |
| 0,4 | – |
| Accelerator pump delivery for 10 full strokes, cm³ | 7±25% | – |
| Calibration number of the mixture sprayer | 3,5 | 4,5 |
| Emulsion tube calibration number | F15 | F15 |
| Distance of float from carburetor cover with gasket, mm | 6,5±0,25 | |
Clearances at the valves for adjusting the starting device, mm: | ||
| 5,5±0,25 | |
| 0,9–1,0 | |