Sensor’s output signal frequency or duty cycle depends on the air consumption – HFM sensors. Sensor’s output signal voltage depends on the air consumption – VAF and Hot Wire sensors. 2 shows the MAF made by GM.Īccording to the principle of operation are: 1 shows the MAF sensor made by BOSCH, and fig. MAF usually is placed after the air filter and before the throttle valve in the air flow sucked into the engine.įig. Air consumption is one of the basic parameters for calculating the necessary amount of fuel. The sensor for volume consumption of air is used in many systems for management of engines for measuring value of the transitory cost of air. It is intended to be insensitive to the density of the air. A mass air flow (MAF) sensor responds to the amount of air flowing through a chamber containing the sensor.
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