5. Carburetor
Scheme of the Ozone carburetor
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1 – screw of adjustment of the course of the inlet valve of the accelerating pump; |
19 – the electromagnetic valve with a fuel jet of idling; |
Description of a design
On the VAZ-2106 car the Ozone carburetor of the DAAZ 2107-1107010-20 model is installed now. On the VAZ-21065 car the DAAZ 21053-1107010 carburetor is used (model on the basis of family of Soleks carburetors).
The Ozone carburetor – emulsion type, two-chamber, with the falling stream. It has one balanced float-operated camera, two main dosing systems, the concentrating device (эконостат) in the second camera, autonomous system of idling, transitional systems of the first and second cameras, the diaphragm accelerating pump with a spray in the first camera, the electromagnetic locking valve of system of idling, the spool-type device of removal of crankcase gases in zadrosselny space, the pneumatic drive of a butterfly valve of the second camera. Control of the air gate of the first camera – manual, with the hummock drive. After launch of the engine the gate is automatically slightly opened by the starting arrangement of diaphragm type under the influence of depression in the inlet pipeline. The carburetor is supplied with the union of selection of depression for control of the ignition advancing regulator.
Fuel moves in the carburetor via the mesh filter and the needle valve. The valve is mechanically connected with a float and supports a certain level of fuel in the float-operated camera.
From the float-operated camera fuel comes through the main fuel jets (the first and second cameras) to emulsion wells and emulsion tubes where mixes up with the air arriving through the main air jets. The fuel-air emulsion comes through sprays to small and big diffusers of the carburetor.
The fuel channel of system of idling is blocked by the electromagnetic locking valve after switching off of ignition. The normal state of the valve energized – open.
The system of idling selects fuel from an emulsion well of the first camera. Fuel passes through the idling jet structurally integrated with the electromagnetic locking valve, and mixes up with the air arriving through an air jet of idling and an opening of transitional system of the first camera. The formed emulsion on two channels (one has the calibrated opening – a jet, and another – the adjusting screw differently called by the quality screw) moves to the opening blocked by a quantity screw needle where in addition mixes up with air and further through an emulsion opening gets to the inlet pipeline. The composition of mix is regulated by the quality screw.
At partial opening of butterfly valves (before inclusion in work of the main dosing system) fuel-air mix comes to cameras through transitional openings – on two in each camera.
Ekonostat provides intake of fuel directly from the float-operated camera in a spray of an ekonostat which is located in the diffuser of the second camera. Ekonostat gets into gear on the modes of the maximum power, in addition enriching working mix.
The accelerating pump – diaphragm type, with the mechanical drive from an axis of a butterfly valve of the first camera. At sharp opening of the gate the portion of fuel is injected through a spray into the first camera of the carburetor, enriching mix. The pump is supplied with ball valves. One valve – the return – is located in the channel connecting the float-operated camera with a cavity of the accelerating pump. It opens when filling a cavity of the pump with fuel and is closed when forcing fuel by a diaphragm. Other valve is located in a spray. It opens under pressure of the forced fuel and is closed under the influence of the ball weight as soon as supply of fuel stops. Excess fuel when forcing flows through perepuskny a jet back in the float-operated camera.
Productivity of the pump depends on a profile of a cam, diameter of an opening of a perepuskny jet, a profile and length of an adjusting needle in the channel of a perepuskny jet. In use the accelerating pump is not subject to adjustment.
The starting arrangement consists of the air gate, a control lever the air gate, telescopic draft, draft of the drive of a butterfly valve, the diaphragm mechanism and the drive of management of a butterfly valve. At a pulling of the handle of the drive ("suction") from a driver's seat the air gate is closed, and the butterfly valve of the first camera is slightly opened on 0,7–0,8 mm (a starting gap). At the first flashes depression behind a butterfly valve is transferred in cylinders for a diaphragm which through a rod and draft slightly opens the air gate. The maximum size of opening of the gate is regulated by the persistent screw of a diaphragm located under the screw cap.
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ATTENTION! We recommend to carry out all works on repair and adjustment of the carburetor connected with its partial dismantling, and therefore demanding purity and accuracy on the removed carburetor. Before dismantling of the carburetor the small rigid brush with not dropping out hair moistened with gasoline or kerosene we delete dirt from its external surface. It is convenient to use for this purpose an aerosol barrel "for washing of the carburetor" with special structure. The used rags have to be pure and not to leave fibers and threads. |
Tarirovochny data of the DAAZ 2107-1107010-20 carburetor
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Parameters |
First camera |
Second camera |
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Diameters, mm: | ||
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22 |
25 |
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28 |
36 |
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1,12 |
1,5 |
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1,5 |
1,5 |
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0,5 |
0,6 |
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1,7 |
0,7 |
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– |
1,5 |
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– |
1,2 |
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– |
1,5 |
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0,7 |
– |
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1,5 |
1,2 |
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0,4 |
– |
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0,4 |
– |
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Giving of the accelerating pump for 10 full courses, cm 3 |
7±25% |
– |
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Number of calibrating of a spray of mix |
3,5 |
4,5 |
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Number of calibrating of an emulsion tube |
F15 |
F15 |
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Float distance from a carburetor cover with laying, mm |
6,5±0,25 |
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Gaps at gates for adjustment of the starting arrangement, mm: | ||
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5,5±0,25 | |
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0,9–1,0 | |