How is the carburetor VAZ-2109?

The carburetor VAZ-2109 is a device that performs the function of preparing a working mixture for its further penetration into the combustion chamber of the engine. In fact, this part doses the right amount of air, which must be mixed with gasoline, so that the finished substance is completely burned inside the ICE. And in order to get into the motor a normal mixture, not very poor and not enriched, there are special devices, such as an econostat, an economizer, a start-up enrichment device and an accelerating pump. They are included in each dosage element on VAZ-2109 cars. The carburetor of the "nine" and its device are discussed in detail in this article.

Econostat and accelerator pump:

• Float chamber;
• A nebulizer of the accelerating pump;
• Drive plate of the accelerator;
• Atomizer of the econostat;
• The pump jet;
• Pressure and fuel valves;
• Jet of the econostat;
• Throttle lever;
• Piston spring;
• Check valve ;
• Accelerator pump drive shaft;
• Throttle valve;
• The piston of the accelerating pump.

Economizer

Without it, not a single carburetor VAZ-2109. This is the device that enriches the fuel mixture at full engine load. Most often this mechanism interacts with the main dosing system, thereby increasing the amount of incoming gasoline for the mixture formation. Additional fuel enters the nozzle of the nozzle through a valve with pneumatic or mechanical drive.

Econostat

Has a similar function (as well as the first device) - enrichment of the mixture at the engine load. However, it differs from the economizer by its simpler construction.

Principle of work of the econostat

When the engine is running in the diffuser, a vacuum is generated, under which the gasoline enters the airflow from the float chamber. At the same time, it passes through the fuel jet of the econostat (these details are also installed in the carburetor on VAZ-2109). Getting into the air stream, the finished mixture dissipates. If the engine needs a more enriched mixture, more gasoline enters the cell. Thus, the econostat can regulate the flow and dosage of the fuel-air mixture for passage into the combustion chamber.

Why is the accelerator pump installed in the carburetor VAZ-2109?

If the first two devices served to enrich the fuel-air mixture at full engine load, the pump operates when the throttle valve is opened. It can have a vacuum or mechanical drive. Accelerated pump consists of such parts as:

• Air damper;
• Safety valve ;
• Throttle valve;
• The valve spring.

And the last mechanism of the power supply system of gasoline internal combustion engines, of which the carburetor VAZ-2109 consists, is the launch device. It serves for enrichment when starting a cold engine. By its design, it is an air damper, which is installed in the air branch pipe of the carburetor. This mechanism is controlled by means of a cable.