Mazda 2007 CX-9, Service Highlights

Page: 165 / 614

ALL WHEEL DRIVE (AWD)
03-19–9
03-19
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.
End Of Sie
NG: DIFFERENTIAL OIL TEMPERATURE SENSOR
DIFFERENTIAL OIL TEMPERATURE SENSOR FUNCTION
id031900101700
•
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.
End Of Sie
AWD SOLENOID
(ELECTROMAGNETIC COIL)
CAM BALL
MAIN CLUTCH
MAIN CAM
ARMATURE
PILOT CLUTCH
PILOT CAM
AWD CM
CAM BALL
MAIN CAM
PILOT CAM
INPUT
OUTPUT
DRIVE TORQUE
MAGNETIC FLUX
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