Awd Solenoid Control Current Is On; Differential Oil Temperature Sensor Function - Mazda CX-9 2007 Service Highlights

AWD Solenoid Control Current Is ON

• When the AWD solenoid control current is ON, current flows from the AWD CM to the AWD solenoid, and the
coupling operates in the following manner.
1. Magnetic flux forms at the electromagnetic coil of the AWD solenoid.
2. Due to the magnetic flux in the armature, the pilot clutch is suctioned towards the magnetic coil side and
made to engage. This causes frictional torque to generate in the pilot clutch.
3. The torque is transmitted to the pilot cam, which is engaged with the pilot clutch.
4. A rotational difference is created between the pilot cam and the main cam. Due to this relative torsion, the
cam mechanism operates, transmitting torque from the pilot cam to the ball and then to the main cam. In
this way, the push force exerted on the main clutch is amplified.
5. As the main clutch engages, the drive torque from the front wheels is transmitted to the rear wheels.
• The amount of push force exerted on the main clutch by the main cam (that is, the strength of the drive torque
transmitted to the rear wheels) changes in accordance with the proportion of the force acting upon the pilot
cam, engaged with the pilot clutch. Therefore, by changing the periodicity of the electric current from the AWD
CM to the AWD solenoid (ON/OFF rate of the AWD solenoid = force acting on the pilot cam), the module
controls the transmission of drive torque to the rear wheels.
DRIVE TORQUE
INPUT
MAIN CAM
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NG: DIFFERENTIAL OIL TEMPERATURE SENSOR

DIFFERENTIAL OIL TEMPERATURE SENSOR FUNCTION

• The differential oil temperature sensor detects the rear differential oil temperature based on the resistance of
the thermistor, and inputs it to the AWD CM.
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ALL WHEEL DRIVE (AWD)
ARMATURE
PILOT CLUTCH
MAIN CLUTCH
MAIN CAM
CAM BALL
AWD SOLENOID
(ELECTROMAGNETIC COIL)
MAGNETIC FLUX
AWD CM
OUTPUT
PILOT CAM
CAM BALL
PILOT CAM
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