Engine power supply system — general description (VAZ-2108)

The fuel system consists of devices for supplying fuel and air, preparing the combustible mixture and releasing exhaust gases. The fuel supply devices include the fuel tank 16 (figure 13), separator 10, fuel lines, hoses, fuel pump 3 and fine fuel filter 1. Fuel is supplied with a return drain of excess fuel from the carburetor into the tank through a bypass jet in the carburetor with a diameter of 0.7 mm. On the drain hose there is a non-separable check valve 4, which does not allow fuel to drain from the tank through the carburetor when the car is overturned.



The fuel tank is stamped and welded and consists of two steel half-bodies. The tank is connected to a non-separable separator of 10 gasoline vapors by drainage pipes. To prevent fuel from leaking out of the tank through the separator, it has a non-separable double-action check valve on the outlet hose. As the fuel is consumed from the tank, the valve lets atmospheric air into the tank, and when the pressure in the tank increases, it releases fuel vapors from the tank.



Fine filter 1 is installed in front of the fuel pump on the hoses. The filter is of a non-separable design, with a paper filter element in a plastic housing.

Air is supplied to the engine cylinders through a thermostat, air filter, carburetor and intake manifold.

The exhaust gases are released into the atmosphere through the exhaust manifold, the inlet pipe, the additional and main mufflers.