How Does a Fuel Gauge Work?
1 Answers
Automobile fuel gauge operates as follows: a float is installed in the fuel tank. As the fuel level decreases, the float on the fuel surface also descends, thereby driving the fuel gauge's pointer to indicate the remaining fuel. Working principle of the fuel gauge: The movement of the fuel gauge pointer is controlled by the amount of current passing through a variable resistor. When the fuel tank is full, the float-metal rod-wiper combination results in a low resistance value of the variable resistor. With the switch turned on, a large current flows, causing the fuel gauge pointer to rise significantly. Conversely, when the fuel tank is empty, the float-metal rod-wiper combination leads to a high resistance value of the variable resistor, resulting in a small current flow, which causes the fuel gauge pointer to drop. Main components of the fuel gauge: The fuel gauge primarily consists of two main parts: the measurement unit and the display unit. The measurement unit is responsible for measuring the fuel quantity in the tank, while the display unit shows the fuel quantity on the fuel gauge.