ALL-WHEEL DRIVE SYSTEM [(US)]
ALL-WHEEL DRIVE SYSTEM [(US)]
SM2515106
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Outline
• The electronic all-wheel drive (AWD) control system (i-ACTIV AWD) automatically and optimally controls drive torque distribution for the front and rear wheels. Due to this off-road mobility and driving stability are improved.
• Based on the input signals from each sensor, the PCM determines vehicle driving and road conditions, and controls output current to the electronic control coupling (AWD solenoid) inside the rear differential. This control allows for optimal distribution of the drive torque from the engine to the rear wheels.
• Actual fuel economy similar to the 2WD has been realized by minimizing energy loss for the entire i-ACTIV AWD system.
• AWD control is performed while coordinating with the G-vectoring control plus. Due to this, handling stability during cornering has been improved.(See G-VECTORING CONTROL PLUS (GVC PLUS) [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
Structural View
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Structure
• Consists of the following parts:
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Electronic control coupling (AWD solenoid)
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(See ELECTRONIC CONTROL COUPLING.)
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Differential oil temperature sensor
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PCM
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AWD warning light
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(See AWD WARNING LIGHT.)
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TCM
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DSC HU/CM
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(See DSC HU/CM.)
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EPS control module
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ESU
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(See ELECTRICAL SUPPLY UNIT (ESU).)
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System Diagram
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Features
• Based on the inputted signals listed below, the AWD CM calculates the optimal amount of torque distribution for the rear wheels and outputs a corresponding electric control current to the electronic control coupling (AWD solenoid).
• The module controls the current outputted to the AWD solenoid by changing the rate of the ON/OFF timing.
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Signal output part |
Signal name |
Note |
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TCM
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Selector lever position
Transmission gear position
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Transmitted as a CAN signal
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DSC HU/CM
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Four-wheel speed
Brake fluid pressure
Coupling torque request
Parking brake position
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EPS control module
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Steering angle/steering angle sensor condition
EPS status
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Differential oil temperature sensor
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Rear differential oil temperature
Electronic control coupling tempetarure
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Operation
• For the operation content of the i-ACTIV AWD system, refer to the [AWD CONTROL].(See AWD CONTROL [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)