Kia Sorento: Direct Electro Hydraulic Actuator Coupling Description and Operation

Kia Sorento (MQ4, 2021-2026) Service Manual / All Wheel Drive (AWD) System / Coupling Assembly / Direct Electro Hydraulic Actuator Coupling Description and Operation

Description

AWD ECU processes signals from various sensors and determines the current road and driving conditions.

The ECU then utilizes this information to implement precision control over the AWD coupling's multi-plate clutch and variably adjust the amount of torque delivered tothe rear wheels.

Electric AWD Driving Mode(Terrain Mode)

It makes smooth escape performance by distribution driving power automatically on slippery road such as snowy road and ice road.

AWD Driving Mode (Terrain Mode)

Drive mode	Information
AWD AUTO	- AWD AUTO is used when driving on roads in normal conditions, roads in urban areas, and on highways. - All wheels are in operation when a vehicle travels at a constant speed. Required tractions applying on front and rear wheels vary depending on road driving conditions and driv-ing conditions, which will be automatically controlled by the computing system. - When the cluster's AWD display mode is selected, the cluster displays the status of how four wheels’ traction forces are distributed.
SNOW	- SNOW mode is used to appropriately distribute the vehicle’s traction forces and prevent wheel slippage when driving on snowy or slippery road.
MUD	- MUD mode is used to ensure safe driving by appropriately distributing the vehicle’s traction forces when driving on muddy, unpaved or rough roads.
SAND	- SAND mode is used to ensure safe driving by appropriately distributing the vehicle’s traction forces when driving on sandy, graveled or unpaved off-roads.

Electronic coupling - AWD Control (By Driving Condition)

1.	When driving with constant speed - Power is delivered mostly to the front wheels.

2.	Cornering (Auto Mode) - Adjusts the amount of power to the rear wheels based on the turning radius and cornering speed

3.	Wheel slip (Auto Mode) - If one or both of the front wheels lose traction, the system transfers an appropriate amount of power to the rear wheels based on the slip amount at the front wheels.

4.	Terrain Mode - Maximizes rough terrain performance

Operation

Electronic coupling

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All Wheel Drive (AWD) System — Coupling Assembly / Direct Electro Hydraulic Actuator Coupling / Description and Operation / Operation illustration

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All Wheel Drive (AWD) System — Coupling Assembly / Direct Electro Hydraulic Actuator Coupling / Description and Operation / Operation illustration

Operation order

1.	AWD ECU receives CAN signals from the vehicle's sensors.

2.	AWD ECU calculates the necessary amount of rear-wheel torque and sends the corresponding driving current to the actuator (electronic motor and hydraulic pump).

3.	Hydraulic pressure generated by the actuator moves the piston.

4.	Friction from the piston's movement engages the clutch.

5.	Power is delivered to the rear wheels.

Direct Electro Hydraulic Actuator Coupling Components and Components Location

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Direct Electro Hydraulic Actuator Coupling Repair procedures

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Kia Sorento: Direct Electro Hydraulic Actuator Coupling Description and Operation

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