everytime i fill up my car, the pump always shuts off at just the right time to fill my tank. every tank is a different size, so how does the machine know?
In: 16
There’s a card mounted to the fuel pump that has 2 wires on it and a series of resistors.linked to those wires that has a wide range of electrical resistance. Attached to that card is a float that sits at the surface of the fuel in the tank. As the fuel depletes, the float gets lowered and that arm attached to it moves across the resistors and changes the voltage which the car interprets as a level of fluid in the tank.
Latest Answers