Allison Transmission’s eGen Flex electric hybrid solution introduced in New York City Transit buses

April 23, 2021
The eGen Flex will help protect the environment and begin revenue service in May.

Allison Transmission's eGen FlexTM, its electric hybrid propulsion solution, will be put into revenue service one New York City Transit (NYCT) buses in May.

The electric hybrid system from Allison offers a fully electric propulsion when customers need it, without the added infrastructure requirements of full electrification. The eGen Flex system includes full electric drive capability for up to 10 miles, depending upon duty cycle and accessory load demands. This option will be set automatically through geofencing technology for zero emission zones and passenger depots for a quieter and cleaner environment.

Allison says its eGen Flex system can improve fuel economy by up to 25 percent versus a conventional clean diesel bus, and has the ability to operate accessories such as air conditioning and electric heat at optimal efficiency with clean electric power. Moving these accessories to electric power reduces the strain on the engine, reducing fuel consumption and maintenance costs over the vehicle’s lifetime. This also reduces dependence on fossil fuels at the pump, while delivering increased uptime.

“Our electric hybrid systems continue to demonstrate bottom-line operating benefits for municipalities and fleets while delivering industry-leading performance, reliability and durability,” said Rohan Barua, vice president of sales, North America, Allison Transmission. “There are currently 2,500 NYCT buses equipped with Allison transmissions and electric hybrid propulsion solutions, and we look forward to continuing our longstanding relationship with the authority as it transitions to our latest technology that will reduce emissions, increase fuel economy and improve the overall ease of rideability and quality of life for passengers.”

NYCT is collaborating with Allison to put the eGen Flex electric hybrid system into revenue service to advance sustainable technologies that will improve the environmental footprint, reduce dependence on fossil fuels and provide a better rider experience.

The eGen Flex allows transit fleets to evaluate electric capability and their electric range needs, while still having the resiliency of a diesel range extender, whether needed for longer routes, route flexibility, unplanned congestion on routes or an inability to recharge due to power grid challenges.