Kenworth Unveils SuperTruck 2 at ACT Expo 2024
Kenworth revealed its SuperTruck 2 demonstrator at the ACT Expo 2024 in Las Vegas. This prototype, developed over six years in collaboration with PACCAR and the Department of Energy’s SuperTruck program, aims to enhance freight efficiency using diesel power.
Advanced Aerodynamics and Design
SuperTruck 2 features a modern exterior design with significant updates to its powertrain and driver amenities. “We began with an ideal aerodynamic shape and envisioned the next-generation long-haul vehicle,” said Joe Adams, Kenworth’s chief designer.
The result is a futuristic yet practical vehicle that minimizes aerodynamic drag and incorporates technologies ready for refinement and commercialization.
The aerodynamic design includes a central cockpit with a panoramic view, a narrowed nose, sloped forehead, low skirts, and fully enclosed wheels. Traditional side mirrors have been replaced by slim camera stalks with night vision.
A variable suspension system adjusts ride height to optimize aerodynamics, resulting in a 48% reduction in drag compared to Kenworth’s baseline vehicle.
Powertrain and Efficiency
The Kenworth SuperTruck 2 is equipped with a PACCAR MX-11 engine paired with a PACCAR TX-12 automatic transmission, producing 440 hp. It features a mild hybrid system with a 48V electric generator and lithium-ion batteries recharged through regenerative braking.
This system powers electric fans, steering, cooling systems, HVAC pumps, and an exhaust heater for emissions after treatment. The engine fan alone can use up to 80 hp. Additionally, the hybrid system supports the driver’s overnight in-cab amenities.
With the 48V system powering auxiliaries, the MX-11 engine reached 55.7% energy efficiency. This system can improve overall fuel efficiency by 10%, according to Maarten Meijer, PACCAR’s senior engineering manager for Advanced Technology.
Enhanced Features and Capabilities
SuperTruck 2 includes a center driver cab and a new sleeper compartment. Its aerodynamic design places the powertrain between the frame rails and behind the front axle. The truck’s chassis incorporates a reverse-splayed configuration for better stability and handling.
The vehicle weighs 26,100 lb (11,839 kg), which is 7,100 lb (3,221 kg) lighter than before, thanks to the use of lightweight materials and low-rolling-resistance tires.
Versatility and Future-Readiness
Though powered by a diesel engine, the SuperTruck 2’s design can accommodate fuel cells, hydrogen or natural gas tanks, and batteries without altering the basic cab. This flexibility ensures that the truck is prepared for future advancements in fuel technology.
Collaborative Effort
The SuperTruck 2 project involved several partner companies, including AVL for engine development, Eaton for the powertrain, the National Renewable Energy Laboratory, and Ohio State University. “I’m very proud of this project,” said Walenczak.
“As Kenworth celebrates its 100th anniversary, SuperTruck 2 continues our tradition of delivering value to customers. This truck is a key milestone, helping us envision our future direction.”
Impressive Results
The outcomes of the SuperTruck 2 project show significant improvements: freight efficiency has increased by 136%, achieving an average of 12 miles per gallon (MPG).
Engine efficiency reached a record high of 55.7%, and there’s been a substantial weight reduction of 7,100 pounds. Additionally, a notable 48% enhancement in aerodynamics has been attained.
Conclusion
Kenworth’s SuperTruck 2 represents a significant advancement in long-haul trucking, combining cutting-edge aerodynamics, a powerful and efficient powertrain, and innovative design features.
This project not only showcases the potential for improved freight efficiency but also highlights Kenworth’s commitment to innovation and sustainability in the trucking industry.
