Fuel System

PROCEDURE

The fuel system of a carburetor engine consists of the fuel tank, fuel pump, carburetor, air cleaner and fuel lines. Carburetors fitted to vehicles can be single-barrel or two-barrel. The mechanical fuel pump driven from the camshaft is used on engines with a displacement of 1.1 and 1.3 L, and on engines with a displacement of 1.6 and 1.8 L it is driven from the intermediate shaft. The air cleaner with a dry replaceable paper element is equipped with an automatic device for regulating the temperature of the air supplied to the engine. Some engines are equipped with a fuel injection system. This system consists of the fuel tank, fuel pump installed next to the fuel tank under the underbody of the vehicle, and the fuel injection system itself produced by Bosch or Volkswagen. Fuel is continuously sprayed by the injector into the intake manifold, where it mixes with air, and is delivered into the cylinder when the intake valve opens. The fuel system of a diesel engine includes the fuel tank, high-pressure fuel pump (HPFP), injectors, fuel and air filters and fuel lines. In a diesel engine, fuel is injected by the injectors directly into the cylinders at the end of the compression stroke. The required pressure is created by the high-pressure fuel pump. Some diesel engines are equipped with turbochargers; these engines are called turbocharged engines. The turbocharger allows a larger quantity of air to be supplied to the cylinder while the intake valve is open. Therefore, a larger quantity of fuel can be injected into the cylinder, and as a result the engine power is increased.