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Air Flow Sensor

Air flow sensor is an electronic device which is used for controlling fuel-injected engines and is also called an air mass sensor. It is used to measure the amount of air flowing inside the engine at any given point of time.This data is then transferred to the Electronic Control Unit (ECU) so that right amount of fuel can be injected.A flap placed in the airflow or an electrically heated wire is used to acquire the data.

 

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Aforementioned, the air flow sensor is used in certain automobiles to measure the quantity of air going inside the internal combustion engine. The new modern electrically controlled diesel engines use air flow sensors, as it being the only possible means of determining the air goinginside them. For a petrol engine, the electronic control unit (ECU) calculates how much fuel is required to be injected into the cylinder ports whereas in case of a diesel engine, the ECU sensors control the fuel flowing through the injectors into the engines cylinders during the compression stroke. There are certain types of air flow sensors like a vane or flap type or "hot wire" and "hot film" air mass sensors. The vane type of air flow sensor are those which can measure the volume of air where as hot wire type measures the speed of air flow through the engine. There is a spring in the vane type of sensors which returns the flap to its initial position. The air flow sensors were also used Industrial environments but there were some failures in that field. Air flow sensors are also being used for Resource and development of cars in Industries.

 

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