Hyundai Elantra HD: Mass Air Flow Sensor (MAFS). Description and Operation
Function And Operation Principle
Mass Air Flow Sensor (MAFS) is a hot-film type sensor and is located in
between the air cleaner and the throttle body. It consists of a tube, a sensor
assembly and honeycomb cell and detects intake air quantity flowing into the
intake manifold. Air flows from the air cleaner assembly through the honeycomb
cell and over the hot film element.
At this time, heat transfer is generated by convection and this sensor
loses its energy. This sensor detects the mass air flow by using the energy
loss and transfers the information to the ECM by vaoltage. The ECM calculates
fuel quantity and ignition timing.
