SSANGYONG KYRON 2010.01 Manual page 273

OVERVIEW AND OPERATION PROCESS
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AIR FLOW SENSOR
2321-01
(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.
<CI Type HFM Sensor Structure>
7. Hybrid
8. Sensor
9. Mounting plate
10. O-ring
11. Temperature sensor
2321-01
▶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)
ENGINE D20DT
04-7
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