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what is a fuel level gauge
The principle of automobile fuel level gauge:
The main structure of the fuel gauge has two main parts: the measuring unit and the display unit. The measuring unit is mainly used to measure the amount of oil in the fuel tank, and the display unit is to display the amount of fuel in the fuel tank on the fuel gauge.
The measuring unit is mainly designed in the fuel tank of the car and consists of a floating ball connected to a metal rod. The basic principle is the same as that of the floating ball in the toilet tank at home. When the water level is lowered, the position of the floating ball will also be lowered accordingly. At this time, a connecting rod will be driven to activate the water injection port so that water can be injected in. When the water level rises, the position of the floating ball will also rise. At a certain level, the connecting rod will close the water injection port. The measuring unit of the oil gauge also uses this very simple, crude, and very practical method, but the end of the metal rod connected to the floating ball will be connected to a variable resistor through a movable contact, and the floating ball is in the fuel tank. The change of the position of the oil surface of the car will also change the position of the wiper on the variable resistor through the metal rod, and the variable resistor will be connected to the fuel gauge of the car, and the movement of the pointer of the fuel gauge will be affected by the magnitude of the variable resistor current is controlled.
When the fuel tank is full, the float-metal rod-wiper will make the resistance value of the variable resistor very low, the switch will also open and conduct a large amount of current, and the pointer of the fuel gauge will jump high, pointing to F, when When the fuel tank is empty, the float-metal rod-wiper will increase the resistance value of the variable resistor, and the conduction current will also decrease, and the pointer of the fuel gauge will drop to point to E. It is worth noting that there will be various movements when the car is moving. When going uphill, downhill, braking, turning, and starting, it will cause the height and position of the float to change, which will cause the warning lights to flicker on and off. When looking at the fuel gauge or its warning lights, it is mainly based on when the car is driving on a flat and straight line.
The car fuel level gauge is an indicator used to show the amount of fuel remaining in the vehicle. As an important basis for the driver to judge whether to refuel, the driver can help the driver know the fuel remaining or the normality of the fuel gauge by grasping the structure and meaning of the fuel gauge. whether to make an accurate judgment.
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