Allison
Trailerbodybuilders 9437 Allison Transmission Nine Speed Model Image 1 Without Filter 2017 09 27 10 32 2017 09 27 12 11 0

Allison launches 9-speed tranny, expands electrification

Sept. 25, 2018
Allison Transmission plans to offer its medium-duty, fully automatic 9-speed transmission globally.

Allison Transmission plans to offer its medium-duty, fully automatic 9-speed transmission globally, and it recently developed an electric hybrid system with purely electric extended range.

“Right now is an exciting time to be part of Allison and our industry as a whole,” said David S. Graziosi, president and CEO of Allison Transmission. “There is more rapid change in our industry and more Allison initiatives underway today than at any point during the last decade.”

With its deep first gear ratio and excellent ratio coverage, the Allison 9-speed transmission provides fuel savings as the highly efficient gear train allows the torque converter to lock up early in first gear. Additionally, the 9-speed includes an optional integral engine stop-start system that provides immediate transmission engagement and vehicle hold while the engine is restarted. Providing value for a variety of applications, the 9-speed transmission is ideal for distribution trucks, rental and lease trucks, and school buses.

“With this new transmission, Allison continues to demonstrate its commitment to help achieve standards regarding fuel efficiency and vehicle emissions,” Graziosi said.

The Allison 9-speed model leverages the durability of the Allison 2000 Series 6-speed transmissions, which have accumulated more than 100 billion miles globally. It was designed to utilize the same vehicle manufacturer’s interfaces as its 6-speed predecessor, providing ease of integration into vehicles currently released with the Allison 2000 Series.

In addition to the 9-speed transmission, Allison also expanded its electrification portfolio with an electric hybrid system that includes a purely electric extended range—up to 15 kilometers. Ideal for transit bus and motor coach applications, the system features zero-emissions with engine off, including approaching, during and leaving passenger stops for a quieter and healthier environment.

Additional features include a higher energy Li-ion battery for extended engine off range; a smaller, lighter dual inverter with water ethylene glycol cooling for more efficient operation; and Increased Power Accessory II to improve fuel economy by using the hybrid system to power accessory components like air conditioning, air compressors and power steering.

“This hybrid with extended electric range builds on one of the most dependable and efficient hybrid-propulsion systems,” Graziosi said. “With over 8,000 buses around the world using our system since 2003, Allison was a pioneer in electrification and remains a trusted brand.”

The system is pure electric capable, but no electric charging infrastructure is required. Battery charging is accomplished via regenerative braking and engine operation. The regenerative braking capability can extend the brake change interval by up to 350 percent. The two-mode split parallel architecture improves fuel economy up to 25 percent.  
 

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