Pic. 2.61. Fuel unit of the car Mazda 3: 1 - fuel tank; 2 - check valve; 3 - block of the fuel pump; 4 - fuel injector; 5 – pulsation damper; 6 - fuel pump relay; 7 - control connector; 8 - quick connector; 9 – a cover of a jellied mouth of a fuel tank
The vehicle's fuel assembly consists of a high pressure fuel pump unit, a fuel tank, fuel injectors and fuel connecting pipes (fuel lines). From the fuel tank, the fuel pump delivers fuel under pressure to the fuel line, from where it enters the cylinders through the nozzles. The nozzles dose and spray the fuel. When voltage is applied to the solenoid winding, the needle rises, passing fuel. The amount of fuel is determined by the duration of the pulse during which the nozzle is open. The fuel then flows back into the fuel tank through two metal tubes located under the bottom of the vehicle. The fuel pump is installed in the fuel tank (pic. 2.61).