Air Flow Sensor (Hot Film Air Mass Sensor) - SSANGYONG 2004 Rexton 2.7XDi Workshop Manual

DI03-8

AIR FLOW SENSOR (HOT FILM AIR MASS SENSOR)

1. Plug-in sensor
2. Cylinder housing
3. Protection grid
4. Hybrid cover
5. Measuring duct cover
6. Housing
Air flow sensor is locating on the air intake passage between air cleaner and intake manifold and measures air volume
flows to engine combustion chamber and intake air temperature.
And intake temperature sensor built-in the sensor detects intake temperature.
Internal circuit of the air flow sensor is being used to control the voltage value to control the temperature to maintain the
heating resistance (Rh) to 160°C that is higher temperature than intake air temperature that is measured by resistance
(RI).
Temperature sensor of the heating resistance (Rh) is measured by resistance (Rs).
If temperature changes occur due to increasing/decreasing intake air volume, voltage of the heating resistance changes
to maintain the intake air temperature changes to set value (160°C).
Control unit computes intake air volume based on voltage changes of heating resistance.
Intake air temperature is measured by NTC integrated in the sensor.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
<CI type HFM sensor structure>
7. Hybrid
8. Sensor
9. Mounting plate
10. O-ring
11. Temperature sensor
Change history
inner tube added + grid (No.3)
added + sensing chip changed +
sensing section design changed
Results
Durability has enhanced 60
times (lab test results)
INTAKE SYSTEM
DI ENG SM - 2004.4
Y220_03011