Allison and Cummins partner on Electric Hybrid Drivetrain

Partner to launch an electric hybrid bus system by 2027, reducing emissions with up to 50% engine-off operation.

Indianapolis, United States- Allison Transmission Holdings Inc., an American manufacturer of commercial duty automatic transmissions and hybrid propulsion systems has partnered with Cummins Inc. to integrate and certify the Cummins B-Series engine with the Allison eGen Flex electric hybrid propulsion system for the transit market. This collaboration aims to meet the EPA’s Phase 3 Greenhouse Gas Emissions Standards for Heavy-Duty Vehicles, offering a reliable, low-emission solution by 2027.

Mr. Rohan Barua, Vice President of North America Sales, Global Channel and Aftermarket at Allison Transmission, said, “This initiative continues Allison’s position at the forefront of sustainable transportation with our comprehensive portfolio of propulsion solutions, which includes fully electric axles and fuel-efficient conventional transmissions that pair seamlessly with alternative fuels and electric propulsion, in addition to the eGen Flex electric hybrid solution for the transit industry."

The eGen Flex system gives transit agencies an efficient way to reduce emissions while maintaining high performance and reliability. It can operate up to 50% of a bus's route in engine-off mode, reducing emissions in urban areas. Using geofencing technology, the electric-only mode activates in zero-emission zones and during stops, eliminating engine noise and emissions.