KALAMAZOO, Mich. … Diversified industrial manufacturer Eaton Corporation said today that the results of an independent study confirmed that automated manual transmissions (AMTs) achieve substantial fuel consumption advantages over conventional automatic transmissions. The simulation, which revealed fuel economy improvements of up to 22 percent as compared to a conventional automatic transmission, was conducted by Roush Industries Inc., for the U.S. Army Tank Automotive Research, Development and Engineering Center/National Automotive Center (TARDEC/NAC).
“We are extremely pleased with the results of this study as it once again confirms the fuel-saving benefits that are inherent in our growing lineup of automated transmissions,” said Staci Kroon, senior vice president and general manger, commercial vehicles for Eaton’s Truck North America Division. “In addition, it is always a positive when you can help reduce our industry’s carbon footprint. Our family of UltraShift transmissions is one way of reducing our industry’s carbon footprint and it is consistent with Eaton’s sustainability mission. This is definitely a win-win situation for both our customers and the environment.”
According to Jeff Spitzner, military account manager for Eaton’s Vehicle Group, Eaton provided Roush with the gear ratios and estimated efficiencies for a series of newly designed UltraShift® PLUS heavy-duty automated transmissions for vocational and severe service use. These transmissions will be released for limited production in the fall of this year.
Spitzner added, “In order to eliminate uncontrollable outside variables and provide repeatable results quickly, the test was conducted using analytical simulation software that factored in optimized final drive ratios. That was able to provide a realistic comparison, and to take advantage of the wider operating ranges that are available on Eaton AMTs.
“The test went on to conclude that the fuel economy gains may be attributed to the greater efficiency of AMTs. In addition, the increased number of gears that are available, complimented with an optimized shift schedule, will keep the engine running in its most efficient range.”
These results were revealed at the National Defense Industrial Association Michigan’s Chapter’s first Ground Vehicle Systems Engineering and Technology Symposium, being held at the Detroit Marriott in Troy, Mich.
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Roadranger® is a marketing alliance of Dana Holding Corporation, Eaton Corporation and other trusted partners, providing a complete line of drivetrain components, systems, lubricants, safety products and service tools, including manual and automatic transmissions, hybrid power systems, clutches, driveshafts, steer and drive axles, brakes, tire pressure management systems and collision warning systems with adaptive cruise control. Truck makers, dealers, owners and service providers are supported by the Roadranger support team – providing specification assistance, training, service, parts and warranty expertise throughout North America.
Eaton Corporation is a diversified power management company with 2008 sales of $15.4 billion. Eaton is a global technology leader in electrical components and systems for power quality, distribution and control; hydraulics components, systems and services for industrial and mobile equipment; aerospace fuel, hydraulics and pneumatic systems for commercial and military use; and truck and automotive drivetrain and powertrain systems for performance, fuel economy and safety. Eaton has approximately 70,000 employees and sells products to customers in more than 150 countries. For more information, visit www.eaton.com .
As one of the automotive industry’s leading resources for powertrain development services, Roush’s engineering teams design, develop, test, and manufacture complex powertrain systems and offer customers seamless access to a host of in-house analysis, project management, and vehicle development services. Founded in 1976, Roush is a full-service engineering supplier headquartered in the Detroit suburb of Livonia, Michigan, with over 2,500 employees in facilities located throughout North America. Widely recognized for providing engineering, testing, product development, and manufacturing services to the transportation industry, Roush also provides significant support to the automotive aftermarket, electronics, consumer product, and motorsports industries. More information can be found at their website,