Volvo’s SuperTruck Exceeds EPA Freight Efficiency Goals

Volvo's SuperTruck is unveiled in Washington, D.C. Photo by Jim Park

Volvo Trucks North America's SuperTruck demonstration rig combined advanced aerodynamics, vehicle and powertrain technologies to achieve a freight efficiency improvement of 88%, exceeding the 50% improvement goal set by the U.S. Department of Energy SuperTruck program compared to a base model 2009 Volvo VN.

From the top-of-cab solar panels powering its battery and interior lights, to its ultra-light aluminum frame and highly advanced 425 horsepower 11-liter proprietary engine, the SuperTruck concept vehicle allowed Volvo engineers to push the boundaries of heavy truck efficiency. The sleek tractor-trailer combination boosted fuel efficiency by 70%, exceeding 12 mpg consistently in testing, with some test runs showing more than 13 mpg. Powertrain brake thermal efficiency reached 50%.

Göran Nyberg, president of Volvo Trucks North America, noted that the base model Volvo in 2009 averaged 7 mpg.

The SuperTruck program was a five-year DOE research and development initiative to improve freight efficiency – meaning more payload carried while burning less fuel – by 50% compared to 2009 base model trucks.

Volvo's aerodynamic SuperTruck has a shorter front end than conventional trucks on the road today, and the hood has a sharper downward slope. Lightweight fairings run the length of the tractor and trailer, and cameras have replaced rearview mirrors. Its redesigned chassis is made almost entirely of aluminum, which halved the chassis weight and contributed to an overall tractor-trailer weight reduction of 3,200 pounds.

An enhanced version of Volvo's I-See, a new feature that memorizes thousands of routes traveled and uses that knowledge to optimize cruise speed and keep the I-shift automated manual transmission in the most fuel-efficient gear possible, was an integral part of the fuel efficiency gains seen during SuperTruck on-road testing.

A key part of the overall efficiency gain is the downsized 11-liter Volvo engine, featuring advanced fuel ...Read the rest of this story

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