Volvo Trucks unveiled the next-generation "I-Roll" technology, the world's first to combine a stop/start engine function with a heavy-duty truck to further enhance fuel efficiency and environmental performance. The stop/start function reduces fuel consumption and carbon dioxide emissions. Following the aerodynamic improvement from the Aero Cab introduced in 2024, combining the stop/start function further strengthens fuel efficiency and carbon dioxide emission reduction effects.
Separately from this technology, Volvo Trucks already won the top prize at the 2025 Green Truck Award for the Volvo FH Aero.
The newly introduced stop/start function was developed based on Volvo's intelligent driving support technology I-See and the existing I-Roll. It analyzes driving routes and road curvature information in real time and automatically stops the engine when downhill sections are detected; in these sections no fuel is consumed and no exhaust emissions occur.
The new stop/start function activates at speeds above 60 km/h, and the new "I-Roll" equipped with this function provides up to an additional 1% fuel savings and CO₂ emission reduction depending on road conditions and temperature. This is expected to be an important means of increasing the transportation industry's expense efficiency and sustainability, in addition to the savings already achieved by existing technologies.
Jan Hjelmgren, head of product management at Volvo Trucks, said, "Volvo Trucks engineers have once again introduced an innovative engine technology that greatly improves fuel efficiency in truck transport," and noted, "Going forward, Volvo Trucks will continue to improve internal combustion engine performance in line with decarbonization strategies to minimize environmental impact."
Volvo Trucks' stop/start function is applied to Volvo FH and FH Aero models equipped with the 13-liter diesel engine, and will be available for customer order starting in Nov. 2025.
Volvo Trucks Korea has been accelerating the expansion of eco-friendly commercial vehicle adoption, recently beginning pilot operations of large electric trucks for metropolitan public sanitation vehicles. In addition to diesel engines, it is realizing the Zero Emission Freedom vision by developing various decarbonized transport solutions such as internal combustion engines based on renewable fuels, battery electric trucks, and Hydrogen Fuel Cell trucks.
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