How does differential torque vectoring improve cornering?
Differential torque vectoring improves cornering by delivering different amounts of driving torque to individual wheels so the vehicle can better control its direction and stability. Instead of sending the same torque to every driven wheel, the system can adjust torque according to what each wheel needs while the vehicle is turning.
Why different wheels need different torque
When a vehicle corners, the inside and outside wheels travel different distances. The outside wheels cover a longer path and generally need to rotate faster than the inside wheels.
Torque vectoring takes advantage of these differences by controlling the torque delivered to individual wheels. This can help the vehicle follow the driver's intended path more precisely.
Reducing understeer
Understeer occurs when a vehicle tends to turn less than the driver expects, causing it to move toward a wider path.
A torque-vectoring system can reduce this tendency by sending more driving torque to an appropriate outside wheel. The resulting difference in wheel forces can create a yaw moment that helps the vehicle rotate into the corner.
Improving stability
Torque vectoring can also help manage excessive rotation. If sensors detect that the vehicle is beginning to rotate more than intended, the control system can adjust torque distribution to help bring the vehicle closer to the driver's intended path.
The system may work together with traction control and electronic stability control rather than operating independently.
Improving traction when accelerating
During cornering, not all tires have the same available grip. A tire that is lightly loaded or has limited traction may not be able to use much additional driving torque.
By directing more torque toward a wheel with better available grip, the system can make better use of the tires' traction and reduce unnecessary wheelspin.
How the system knows what to do
Modern torque-vectoring systems can use information such as:
- Steering angle
- Vehicle speed
- Individual wheel speeds
- Yaw rate
- Throttle position
- Acceleration
- Traction conditions
The control system uses this information to determine whether torque should be increased, reduced, or shifted between wheels.
Mechanical and electric systems
Torque vectoring can be achieved through mechanical differentials, electronically controlled clutches, or individual electric motors.
Electric vehicles have a particular advantage because separate motors can provide very precise control of torque at different wheels without relying entirely on mechanical components.
What torque vectoring cannot do
Torque vectoring cannot create unlimited grip. If the tires are already beyond their available traction, changing the torque distribution cannot overcome the physical limits of the road surface.
Its purpose is to use available traction more effectively and control the vehicle's behavior, not to eliminate the effects of speed, road conditions, tire grip, or driver inputs.
The key point
Differential torque vectoring improves cornering by changing torque distribution between wheels to influence traction, yaw, and vehicle balance. When properly calibrated, it can help a vehicle turn more precisely, reduce unwanted understeer or oversteer, and provide better stability when accelerating through a corner.
Its effectiveness depends on the vehicle's hardware, software, tires, suspension, and available road grip.
