Kenworth Truck Co. unveiled its SuperTruck 2 concept vehicle at the Advanced Clean Transportation Expo 2024 in Las Vegas, showcasing a high-efficiency tractor developed over six years with funding from the U.S. Department of Energy (DOE) and Kenworth’s parent company, Paccar Inc.
The SuperTruck 2 features a highly aerodynamic design reminiscent of a bullet train and a unique interior layout with the driver’s seat positioned at the center of the cab. This innovative design, combined with a parabolic windshield and other aerodynamic enhancements, aims to push air around the vehicle more efficiently.
Key Innovations and Efficiency Gains
Kenworth’s SuperTruck 2 has demonstrated a 136% improvement in freight-ton efficiency compared to the company’s 2009 T660 model, achieved through enhancements in fuel economy and significant weight reduction. The vehicle boasts a fuel economy of up to 12.8 miles per gallon and a combined weight reduction of over 7,000 pounds, expanding payload capacity.
The truck is powered by a Paccar MX-11 diesel engine and incorporates a 48-volt electric generator to support a mild hybrid system. This system, which includes lithium-ion batteries recharged through regenerative braking, powers electric fans, electric steering, and other components traditionally driven mechanically. A bench test showed that this combination achieved an engine efficiency of 55.7%, compared to the typical 47% efficiency of modern diesel engines.
Aerodynamic and Technological Features
The SuperTruck 2’s design also includes features like enclosed front and drive axles, covered steps, and a digital mirror system to minimize aerodynamic drag. The concept truck’s specially designed trailer and its 10 new concept tires contribute to the overall weight savings. Additionally, the vehicle’s suspension system is adjustable, optimizing ride height for aerodynamics and obstacle avoidance.
Inside the cab, drivers benefit from a futuristic setup with a 15-inch digital display offering configurable gauges and notifications, along with a newly designed sleeper berth that enhances space and comfort.
Future Applications and Versatility
Kenworth’s Chief Engineer Joe Adams and Design Director Jonathan Duncan emphasized that many of the innovations in the SuperTruck 2 are expected to transition to production vehicles. The truck’s design is powertrain agnostic, capable of accommodating various energy sources, including hydrogen fuel cells, natural gas, and batteries, without requiring changes to the cab structure.
Industry-Wide Impact
Kenworth’s SuperTruck 2 is part of DOE’s SuperTruck 2 program, which challenges truck manufacturers to double the freight-ton efficiency of 2009 models. Other manufacturers, such as Daimler Truck North America, Navistar, and Volvo Trucks, have also introduced their own SuperTruck 2 designs under this program. The DOE’s follow-up SuperTruck 3 program, launched in 2021, focuses on advancing zero-emission technologies for commercial trucks.
At the expo, Kenworth also showcased a hydrogen fuel cell electric version of its T680 tractor and its battery-electric T680E model, reflecting the company’s commitment to exploring a range of sustainable technologies.
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