Improving the accuracy of measuring the fuel level sensor using a fuel level indicator

Abstract

The article analyzed the factors affecting the accuracy of the fuel level sensor readings. The characteristics and design features of various types of fuel level sensors are considered. In modern cars, the potentiometric displacement sensors are used as fuel level sensors. The advantages of such sensors are simplicity of construction, reliability of measurements, low cost. Disadvantages include the presence of mobile contacts, inclined with the time of wear and oxidation.

The effect of thermal expansion of fuel on the operation of fuel sensors is analyzed. An increase in the temperature of the fuel leads to an increase in its volume, which can lead to damage tanks and adjacent parts and also increases the error of the readings of fuel level sensors. Such a phenomenon with the method of refueling in an enterprise has the following consequences: deformation of plastic tanks; damage valve filler cap; loss of fuel, clamping, bending, insulation damage during deformation of plastic tanks; reducing the quality of control over the amount of fuel in the tank GPS devices; break aluminum, metal tanks.

The scheme of the fuel level indicator is proposed. This scheme is optimal and does not require additional intervention in the fuel system. The fuel level indicator is designed to refuel the fuel to the same level at each refueling, taking into account the volume for the expansion of diesel fuel. Its operation depends on the fuel level sensor, in which, as indicated above, each value of the fuel level in the tank corresponds to a certain sensor signal and a change in voltage at the potentiometer. The voltage range of the fuel level sensor is from 0 to 12 V.