Fuel system

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Information about Fuel system
Automotive

Published on April 5, 2014

Author: Sunithneeli

Source: slideshare.net

Basic principle Fuel gauge is an instrument used to indicate the level of fuel contained in the tank.

classification  It consists mainly of two parts, they are A) The sensing unit B) The indicator unit

Sensing unit  The sensing unit usually uses a float connected to a potentiometer which is typically printed design in a modern automobile.  As the tank empties, the float drops and slides a moving contact along the resistor, increasing its resistance.

The Indicator unit  The indicator unit which is usually mounted on the dashboard is measuring and displaying the amount of electrical current flowing through the sending unit

Working of indicator system When the tank level is high and maximum current is flowing, the needle points to "F" indicating a full tank. When the tank is empty and the least current is flowing, the needle points to "E" indicating an empty tank.  F- full tank  E- empty tank

Indicator system advantages disadvantages  It can only display the amount of fuel inside the tank.  It can be fail-safe because the corrosion (or) wear on potentiometer will provide errors sometimes.

Thank you

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