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Tech Briefs
UPS to test hybrid-electric vehicle
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UPS plans to test a hybrid-vehicle technology for package-delivery that combines a conventional engine and electric motors. The news follows General Motors' announcement that it will develop hybrid diesel-electric transit buses, with testing to begin next year in New York.
Developed by Navistar International Corp. and Lockheed Martin Controls Systems, the Hybrid Electric Vehicle (HEV) engine turns a generator to provide electrical energy for 23 batteries and the drive motors. Regenerative braking will be used to recapture vehicle energy for storage in the batteries.
"HEV technology is of particular interest to UPS because of its potential to reduce vehicle emissions, economize on fuel in stop-and-go situations, and reduce maintenance requirements to the drivetrain," said Mike Eskew, UPS Senior Vice President of Engineering.
The HEV provides greater fuel economy, and with its reduced emissions, can meet the EPA's certification as an Ultra-Low Emissions Vehicle using current diesel technology. In addition, the HEV's sealed electric motor and long-life batteries require no maintenance.
Since the 1930s, UPS has been researching and testing alternative fuels to reduce vehicle emissions, dependency on fossil fuels, and operating costs. Currently, UPS has the largest private fleet of compressed natural gas (CNG) vehicles in the United States, with more than 900 package delivery vehicles that operate in 16 cities.
The Navistar/Lockheed Martin concept vehicle design uses an International medium-truck chassis with an International T444E diesel engine. The HybriDrive optimized control system was developed by Lockheed Martin.
UPS will test the vehicle over an 18-month period in three different climatic and environmental areas in Johnson City, New York; Atlanta, Georgia; and Los Angeles, California. The tests will solicit driver feedback, measure emissions, and examine fuel conservation, maintenance issues, speed, acceleration and grade performances.
Kevin Jost
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