Allison Transmission today announced it has received certification from the California Air Resources Board (CARB) for the model year 2022 eGen Flex electric hybrid propulsion system paired with Cummins B6.7 and L9 engines.
Since 2014, Allison has received annual certification from CARB for the Allison H 40/50 EP propulsion system. For the first time this year, the certification was awarded for the eGen Flex, the company’s newest electric hybrid solution for transit buses and coaches.
Introduced in 2020, the eGen Flex electric hybrid system is capable of traveling in electric-only mode for up to 10 consecutive miles or 50 minutes. This electric-only mode can be utilized multiple times per route and per day. In real world revenue service, Allison’s eGen Flex has demonstrated the ability to operate in full engine off mode for more than 50 percent of its time in operation across multiple routes within one of North America’s largest transit fleets. The eGen Flex is further capable of eliminating engine emissions and noise while loading and unloading passengers, in dense pedestrian areas, and in zero emission zones and bus depots. In addition, the eGen Flex improves fuel consumption by up to 25 percent versus a conventional diesel bus, the company said.
“We are thrilled to receive CARB’s certification for the eGen Flex, Allison’s latest innovation in electric hybrid propulsion technology,” said Barbara Chance, director of Mobile Source Regulatory Compliance for Allison Transmission. “The H 40/50 EP legacy system was the first electric hybrid propulsion system to be certified in California for transit buses and coaches. We’re honored to now collaborate with CARB to earn certification for the eGen Flex, which provides revolutionary capabilities for public transit.”
