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Allison Transmission Unveils Integrated Stop-start Technology For Ultra-low Carbon Powertrain Program

Stocks in this article: ALSN

INDIANAPOLIS, July 21, 2014 /PRNewswire/ -- Allison Transmission Holdings Inc. (NYSE: ALSN) today announced new integrated stop-start technology in conjunction with Project ETHOS, an ultra-low carbon powertrain program created by Cummins Inc. to demonstrate the potential of alternative fuels for carbon dioxide (CO2) reductions in medium-duty commercial vehicles.

Allison Transmission Inc. logo.

"As a company, we certainly pride ourselves on being a leader for technological innovations within our industry," said Randall R. Kirk, vice president of product engineering for Allison Transmission. "We have utilized stop-start technology in our hybrid systems for many years and have been pleased to work with long-time collaborator Cummins on this new powertrain concept."

In partnership with the California Energy Commission, Cummins developed an engine that uses E85 (a high-octane blend of ethanol and gasoline) as a fuel to reduce greenhouse gas (GHG) emissions significantly. The Cummins ETHOS 2.8L engine is coupled with an Allison 2000 Series fully automatic transmission which utilizes integrated stop-start for further emissions reduction, as well as increased fuel economy.

Integrated stop-start shuts the engine down when the operator presses the brake pedal and the vehicle comes to a complete stop. The transmission remains in drive during this time and locks the output to help prevent vehicle rollback by using an electric pump. As the driver's foot is lifted from the brake, the system automatically starts the engine to allow acceleration.

"Integrated stop-start is an exciting development that represents the natural evolvement of our product technology," said Kirk. "We are continuously researching solutions to help our end-users reduce their carbon footprint through reduced emissions and fuel consumption."

Allison worked closely with Cummins to integrate the 2550 transmission model for smooth and efficient stop-start operation. The transmission is equipped with specific hydraulic circulation features to ensure smooth operation during stop-start driving. Additionally, all Allison Automatics provide Continuous Power Technology™ with seamless full-power shifts to put engine power to the drive wheels in the most efficient way. The result is faster acceleration and higher average road speed for quicker route times and greater productivity.

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