To get the fuel from the tank to the engine, a fuel pump, located either in the fuel tankor between the tank and the engine, pushes the fuel along the fuel lines, which lie alongthe bottom of the car. In earlier times fuel pumps were mechanically driven, but today'sfuel pumps are electric. Within the tank there is also a device called a sending unit thatmonitors the amount of fuel and sends that information in the form of electronic im-pulses to the fuel indicator on the dashboard. On its way to the engine, the fuel passesthrough one or more fuel filters, which catch dirt before it reaches the carburettor orfuel injectors. And you must keep these fuel filters clean, of course. About twenty yearsago cars had a carburettor. A carburettor mixed air and fuel together so that they entered the cylinders of the engine as a fine vapour spray. But now you'll probably only seea carburettor in a car museum！ Carmakers today use an electronic fuel injection systembecause it's much more exact than the old carburettor and it's also more reliable.