FUEL GAUGE SENDER UNIT

id092200732400

Purpose

• The fuel gauge sender unit detects the fuel amount in the fuel tank.

Function

• The fuel gauge sender unit outputs the fuel level in the fuel tank to the electrical supply unit (ESU) as a fuel gauge sender unit voltage signal.

Structure/Construction

• The fuel gauge sender unit is located in the fuel tank.

• The fuel gauge sender unit consists of a float which moves up/down according to the fuel level in the fuel tank and a variable resistor (sensor) which operates in conjunction with the up/down of the float.

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Operation

1. When the fuel level in the fuel tank increases, the float floating on the fuel surface moves up (1), and when the fuel level in the fuel tank decreases, the float moves down (2).

2. Resistance in the sensor decreases (3) when the float moves up and resistance in the sensor increases (4) when the float moves down.

3. The electrical supply unit (ESU) detects (5) the voltage which changes according to the resistance in the sensor as a fuel gauge sender unit voltage signal.

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