Allison electric propulsion solution

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As flagged up in News last week (CBW1391) Allison Transmission is introducing the new ABE Series, what it says is the first e-axle advanced ultra-low floor electric bus powertrain system in the market. It describes it as one of the world’s most powerful and compact fully integrated electric axles for the transit bus.

The ABE Series integrates dual electric motors, a single- or multi-speed gearbox (depending on e-axle model), oil coolers, pumps and power electronics into a bolt-in system that replaces the entire traditional powertrain within the existing frame. This makes the system applicable for 12m low-floor city and double-decker buses, 18m articulated buses and three-door buses.

“Allison Transmission’s depth of experience in the bus and transit market demonstrates our continuous commitment to innovation,” said David S. Graziosi, Allison Transmission President and CEO. “We have a long history with electric hybrid solutions and full electrification is the next evolution. The ABE Series replaces the traditional powertrain system with the most compact, powerful electric propulsion system available.”

The Allison ABE Series can operate without restrictions at regular highway speeds, and on all allowable grades. The system can handle 100% torque in regenerative braking. With an axle rating up to 13 tonnes, the system is said to provide more power and torque than any other e-powertrain system in its class. With a dual motor, it has continuous axle output power of 536hp and peak output power of 738hp. A single speed e-axle option is also available.

Its proprietary cooling allows for continuous motor power and allows the vehicle to run closer to peak power for longer durations.

An attractive feature for bus manufacturers is the system’s compact design, says Allison. The bolt-in ABE Series fits existing bus frames and suspensions, creating more space for battery packs and other critical electric vehicle components. The standard system is configured for a 28-inch walk through, but has an optional 39-inch configuration.


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