Does 'e' on the fuel gauge represent full or does 'f' represent full?
1 Answers
The 'f' on the fuel gauge represents full. The 'f' stands for the first letter of the English word 'full', indicating a full tank of fuel. The 'e' on the fuel gauge stands for the first letter of the English word 'empty', indicating a low fuel level. When the fuel gauge points to 'e', there is still a small amount of fuel left in the tank to allow the driver to reach the nearest gas station. The fuel level displayed on the fuel gauge is connected to a float inside the fuel tank via a metal rod. This principle is similar to that of a toilet tank. The end of the metal rod connected to the float will be linked to a variable resistor through a movable contact. The position change of the float relative to the fuel level in the tank will also alter its position on the variable resistor via the metal rod, and the variable resistor is connected to the car's fuel gauge. The movement of the fuel gauge needle is controlled by the current from the variable resistor. Fuel gauge indication deviation: During routine battery replacement or gasoline filter changes, or even after the car has been parked overnight, you may notice that the fuel gauge needle is lower than the previously indicated position when restarting the vehicle, leading you to think there is a malfunction. In fact, this is a normal phenomenon. When the fuel pump is operating, a negative pressure is created inside the fuel tank, reducing the tank's volume and causing the fuel level to appear higher. Additionally, the thermal expansion of gasoline due to temperature can naturally cause the gauge to display a higher level. When the temperature drops and the fuel tank is opened, the pressure is released, and the fuel level drops accordingly, resulting in the display deviation. This is a normal phenomenon, but the deviation generally does not exceed the width of one needle.
