2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42
Fuel gauge is what is used to measure how full the car's tank is with gasoline. The error of this device does not exceed 1 percent. Fuel level sensors are usually installed in systems in which fuel consumption and draining are controlled, necessarily in conjunction with satellite monitoring systems.
A good machine has the following qualities:
- It is light in design and weighs less than 300 grams.
- It can be installed in a flat tank, the depth of which is no more than 30 cm - this is facilitated by short measuring probes.
- High accuracy in measuring the fuel level, which is achieved by increasing the expansion of the sensor, as well as the linearity of the scale.
- Modular design should allow changing the measuring head regardless of the probe and not having to recalibrate the tank.
Consider the design of the fuel level sensor.
Assembled it consists of 2 modules. The first is the measuring head, the second is the probe. It is mounted through a flange (which has a gasket) on the tank using self-drilling screws. The fastening at the head shoulddiffer in tightness. This, in turn, is provided by the installed sealing ring in the end groove. The measuring head of the sensor has a voltage stabilizer, as well as a circuit for digital processing of the received signal. Communication with devices located on the outside can only be carried out using an interface cable. In addition, the head has a device for transmitting and receiving data and a protection circuit for input and output circuits.
It connects to a measuring probe, which measures the level of gasoline. It is made of several coaxial electrodes and has a spring in its connector that maintains a good string tension.
How do fuel sensors work? The filling level of the probe, which is immersed in gasoline, as well as its electrical capacitance are related using a linear relationship. The received value is converted into the value (digital) of the actual fuel level in the tank (all this takes place in the measuring head). This data is then processed digitally.
The change in fuel level that occurs due to acceleration is least pronounced in the middle of the fuel tank. It is because of this that the fuel level sensor is installed in this place. It should be noted that the orientation of the measuring probe must be vertical, as any deviation may lead to an error in determining the volume of fuel.
As already mentioned, the fuel level sensor is mounted using a threaded connection inflange, and its tightness is ensured by a sealing gasket made of rubber. After it is installed, you need to complete the process by sealing the device.
It is impossible not to mention the taring of the tank. Before it is produced, it is necessary to ensure the run of the machine with the development of most of the tank volume. This will improve the accuracy of the calibration. Then the empty (or full) tank is filled with equal portions of gasoline. Then the value of the volume must be fixed.
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