Volkswagen adds a full, ‘self-charging’ hybrid option to Golf and T-Roc
Words: Kyle Cassidy
Volkswagen has unveiled a new full-hybrid powertrain that will debut in the Golf and new T-Roc, expanding the brand’s electrified line-up without requiring external charging.
The new series-parallel system is designed to bridge the gap between mild-hybrid and plug-in hybrid models. Unlike plug-in hybrids, the latest drivetrain does not rely on charging cables or public infrastructure. Instead, it generates and stores energy onboard through regenerative braking and a turbocharged petrol engine paired with a generator. So a self-charging hybrid then.
Read more – VW ID.3 Neo – more range and tech
The German carmaker says the new full-hybrid setup will be offered in two power outputs and deliver improved fuel efficiency compared with its existing mild-hybrid ‘eTSI’ technology. Details of the system were presented at the International Vienna Motor Symposium, but specifics have not been forthcoming in terms of consumption.
Positioned between Volkswagen’s current electrified offerings, the new ‘Hybrid’ badge will sit below the plug-in ‘eHybrid’ and performance-focused GTE variants already available in the Golf range overseas.
At the core of the new system is a compact hybrid module that integrates two electric motors, one for propulsion and another acting as a generator, along with power electronics, a differential, a single-speed gearbox, and a multi-plate clutch that connects or disconnects the petrol engine as needed. This sounds like the same set-up used in the Honda e:HEV system. A 1.5-litre turbocharged ‘TSI evo2’ engine and a 1.6kWh lithium-ion battery complete the setup, with the battery mounted under the rear floor.
Volkswagen says the system has been engineered to balance efficiency, performance and refinement. In urban driving, the Golf Hybrid and T-Roc Hybrid can operate on electric power alone at low speeds, delivering near-silent running in stop-start traffic.
The drivetrain automatically switches between three operating modes depending on driving conditions. At low speeds, the vehicles can run purely on electric power. In a serial mode, the petrol engine acts as a generator to supply electricity to the motor, improving efficiency. At higher speeds, a parallel mode engages both the petrol engine and electric motor, with the latter providing additional boost when required.
Drivers will also be able to select between Eco, Comfort and Sport driving profiles. Eco mode limits system output to prioritise efficiency, while Comfort allows full performance. Sport mode sharpens responses and delivers maximum power more readily by favouring energy generation and boost availability.
