Fuel system of gasoline engines (Opel Insignia A)

A returnless fuel system is used. The fuel pressure regulator is part of the fuel pump module, which eliminates the need for a return fuel line from the engine. The returnless fuel system reduces the internal temperature in the fuel tank, since there is no fuel draining into the tank from the engine. And a decrease in the internal temperature in the fuel tank in turn reduces fuel evaporation.

The fuel tank is used to store fuel. It is located at the rear of the vehicle and is secured to the bottom with two clamps. The fuel tank is made from high-density polyethylene by stamping.

The electric turbine fuel pump is connected to the fuel pump module in the tank. The fuel pump supplies fuel under high pressure to the fuel injection system via the pressure fuel line. Fuel from the fuel pump is supplied under higher pressure than required for the injection system. The fuel pressure regulator, which is part of the fuel pump module, provides the required fuel pressure. The fuel pump module is equipped with a check valve. The check valve and the fuel pressure regulator provide the required pressure in the pressure fuel line and the fuel rail, which reduces the time it takes to turn the engine crankshaft with the starter.

(Material copied from this portal: OpelBook.ru)