Torque Vectoring Control

Torque Vectoring Control (TVC) is an advanced vehicle dynamic chassis control technology. Depending on driving dynamics, steering angle, vehicle speed, and road surface grip, it independently and precisely distributes engine or electric motor power (torque) to the left and right wheels, or across all four wheels. Designed to overcome the 50:50 distribution constraints of conventional differentials, this technology significantly enhances cornering limits, handling agility, and overall driving stability.

Working Principle and Implementation

In conventional vehicles, an open differential splits power equally between the left and right wheels. Torque Vectoring Control actively intervenes to bypass this equal-split mechanism:

Dynamic Cornering Adjustments: When negotiating bends at high speeds, the system automatically channels more torque to the outside wheels. Because the outside wheels carry greater vertical load and traction during cornering, this creates a yaw moment that aids turn-in, effectively curbing understeer (front-end push) and sharpening front-end bite towards the apex. 

Key Technical Implementations: 

Mechanical / Electronic Limited-Slip Differential (LSD): Uses multi-plate clutch packs or complex gear assemblies to facilitate active mechanical torque transfer between the left and right wheels. 

Brake-based TVC: Uses the ESC/ABS system to apply light braking force to the inside wheel, prompting the differential to send torque to the wheel with better traction (a cost-effective solution commonly found in mainstream FWD or RWD passenger cars).

Multi-Motor Independent Drive (The Mainstream EV Era): On fully electric vehicles equipped with dual-motor or quad-motor independent setups, the system does away with complex mechanical hardware. The on-board computer directly regulates the output and rotational direction of each individual motor, achieving instantaneous, stepless, and wide-ranging torque vectoring. 

Key Advantages and Performance Capabilities

Torque Vectoring Control offers significant real-world driving dynamic benefits:

Significantly Sharper Handling Agility: By using directional power delivery to counteract vehicle inertia, even bulky SUVs and heavy EVs feel nimble and responsive when tackling switchbacks.

Enhanced Stability in Extreme Conditions: On wet, slippery, or split-mu surfaces (such as tarmac on one side and a slippery patch on the other), the system instantly locks or redirects torque to prevent single-wheel spin, keeping the vehicle planted along its intended line. 

Expanded Dynamic Envelope: Beyond raising on-track performance thresholds, it also serves as an essential layer of active safety for everyday drivers during emergency avoidance manoeuvres.

Market Evolution and Industry Trends

In its infancy, high production costs and mechanical complexity meant Torque Vectoring Control was largely confined to niche high-performance sports cars and flagship luxury 4x4s.

With the rise of the new energy vehicle (NEV) sector—particularly the mainstreaming of dual-motor AWD and quad-motor electric drivetrains—torque vectoring has undergone a technological democratisation. The technology has evolved from traditional mechanical and hydraulic setups into an algorithm-driven electronic control era. Powered by continuous over-the-air and software updates, modern smart vehicles can recalibrate individual wheel torque within milliseconds, making it a cornerstone chassis technology that balances engaging driving dynamics with all-weather road safety.