Geely i-HEV Hybrid Powertrain Launched in China with Preface and Xingyue L

Geely has introduced its latest i-HEV hybrid powertrain in China, marking the debut of this system in the Preface sedan and Xingyue L SUV. The new setup adapts technologies derived from plug-in hybrid systems and applies them to a conventional self-charging hybrid configuration. This approach aligns with strategies seen in established hybrid systems from Japanese manufacturers, focusing on efficiency, cost reduction, and simplified system architecture while maintaining acceptable performance levels across different vehicle segments.

Hybrid System Architecture and Operating Strategy

The i-HEV system integrates an 11-in-1 single-speed dedicated hybrid transmission that combines the electric motor within the drivetrain. In most driving conditions, propulsion is handled primarily by the electric motor, while a hybrid-specific BHE15 1.5-litre four-cylinder engine functions mainly as a generator to charge the battery. At higher speeds, the internal combustion engine can engage directly to provide drive power, improving efficiency under steady cruising conditions. This operating strategy mirrors series-parallel hybrid concepts seen in comparable systems.

Powertrain Differences Between Preface and Xingyue L

Although both models share the i-HEV architecture, their configurations differ significantly. The Preface sedan features a detuned electric motor producing 190 PS (140 kW) and 240 Nm, paired with a naturally aspirated engine delivering 111 PS and 136 Nm. These specifications align with outputs seen in the Galaxy Starship 7, though the exact thermal efficiency figure—whether 48.41% or 47.26%—remains unclear. The system prioritizes balanced performance and efficiency within a lighter vehicle structure.

Enhanced Output Configuration in Xingyue L

The Xingyue L SUV adopts a more powerful configuration using a 238 PS (175 kW) electric motor generating 262 Nm. Due to increased vehicle mass and energy demands, the internal combustion engine is upgraded with turbocharging, producing 163 PS and 255 Nm. This combination ensures sufficient performance while maintaining the hybrid system’s operational efficiency, particularly for larger vehicle applications.

Efficiency Comparison with Existing Hybrid Variants

The efficiency improvements offered by the i-HEV system are relatively modest when compared to existing hybrid configurations. The Preface i-HEV achieves a WLTP-rated fuel consumption of 3.98 litres per 100 km, compared to 4.22 litres per 100 km for the earlier hybrid version. Similarly, the Xingyue L i-HEV records 4.75 litres per 100 km versus 4.79 litres per 100 km in its predecessor, indicating incremental gains rather than a significant breakthrough in fuel economy.

Pricing Advantage and Cost Optimization

One of the most notable advantages of the i-HEV system lies in its reduced cost. By minimizing mechanical complexity and using fewer components, the Preface i-HEV is priced at 107,700 yuan, considerably lower than the 126,700 yuan hybrid version. The Xingyue L follows a similar trend, starting at 148,700 yuan compared to 167,700 yuan for its hybrid counterpart. This pricing strategy enhances accessibility while maintaining core hybrid benefits.

Future Deployment and Performance Benchmark

The i-HEV system is expected to expand into additional models, including the next-generation Emgrand and the Boyue lineup. Notably, the Emgrand has demonstrated high efficiency potential, achieving 2.22 litres per 100 km during a highway test verified by Guinness World Records. With shared components derived from plug-in hybrid systems, the i-HEV platform positions itself as a scalable solution for broader adoption across Passenger Cars, balancing efficiency, cost, and practicality.

Frequently Asked Questions

What is the Geely i-HEV hybrid powertrain and how does it work?
The Geely i-HEV hybrid powertrain is a self-charging hybrid system that combines an electric motor and a gasoline engine to optimize efficiency and performance. It primarily operates using the electric motor for propulsion, while the engine functions as a generator and assists during high-speed driving. This configuration reduces fuel consumption, simplifies system design, and lowers production costs compared to more complex hybrid or plug-in hybrid systems.