Honda is significantly evolving its e:HEV two-motor hybrid system with the introduction of a next-generation architecture featuring advanced electric All-Wheel Drive (AWD). This development aims to enhance both environmental performance and the driving experience through heightened driver synchronization and sensory-rich technologies. The revamped system, encompassing engine and drive unit overhauls, will be implemented across small- and medium-sized models.
A core component of this advancement is a newly developed electric AWD system that utilizes a dedicated electric motor to drive the rear wheels. Unlike conventional mechanical AWD systems that distribute torque from a single power source, this electric setup allows for independent and precise control of front and rear driving forces. This translates to more powerful initial acceleration and superior stability on slippery surfaces, whether starting, accelerating, or turning. The 50-kilowatt-class rear drive unit, compatible with various models, leverages the inherent precision and responsiveness of electric motors to deliver an exhilarating and refined driving experience.
Beyond performance, the electric AWD system offers significant packaging advantages. Eliminating the propeller shaft found in mechanical AWD allows for a flatter cabin floor, enhancing rear seat comfort. This design change also enables the relocation of the battery pack from under the cargo space to under a seat, consequently increasing cargo capacity.
Honda has refined its AWD control technology by leveraging the precise characteristics of electric motors. The system now offers more flexible and accurate driving force distribution, adapting to changes in tire ground contact load. During acceleration, more power is sent to the rear wheels as the load shifts, maximizing grip. Conversely, during deceleration, regenerative braking from the rear wheels complements front-wheel braking, maximizing energy recovery and stabilizing the vehicle’s posture by suppressing pitching. When cornering, the system intelligently increases driving force to the rear wheels, reducing the burden on the front, improving tire load balance, and enhancing vehicle stability.
A newly developed Traction Control System (TCS) further complements the electric AWD. Unlike previous systems, this new TCS independently controls front and rear motors, precisely suppressing tire slip. By detecting and managing slippage separately for each wheel, the system can maximize driving force and grip even on challenging surfaces like snowy inclines. This targeted control ensures that only the slipping wheel’s output is suppressed, maintaining optimal power to the other wheels for a highly reassuring driving performance. The combination of electric AWD and the advanced TCS aims to provide drivers with greater confidence and control, allowing for precise vehicle behavior through turns and ensuring smooth acceleration regardless of road conditions.