The Pierburg 2E2 carburetor was installed on Audi 100 C3 cars from 1982 to 1990 and was one of the most popular carburetors for gasoline engines. It was developed by Pierburg and is designed to provide an optimal mixture of air and fuel for the engine.
The operating principle of the Pierburg 2E2 carburetor is based on the use of the vacuum created by the engine to supply fuel to the cylinders. The air entering the carburetor through the air filter passes through the diffuser and enters the main passage of the carburetor. Here it mixes with the fuel coming from the float chamber and forms a homogeneous mixture.
Next, the mixture passes through the throttle valve, which regulates the amount of air entering the engine. As engine speed increases, the throttle valve opens, increasing the flow of air and fuel into the cylinders.
The Pierburg 2E2 carburetor is also equipped with an idle system that maintains a minimum engine speed when the vehicle is stopped. This system uses an additional channel that allows air to enter the cylinders when the throttle valve is closed.
https://www.audimanual.ru/en/100/C3-P/power-4/fuel/karbyurator-pierburg-2e2-princip-deystviya
Overall, the Pierburg 2E2 carburetor ensures efficient and reliable operation of the Audi 100 C3 engine, providing an optimal mixture of air and fuel in all operating conditions. It remains popular among owners of older Audi models due to its simplicity and reliability.
