Allison Transmission receives certification from California Air Resources Board for model year 2018 hybrid-electric propulsion system paired with Cummins engines

INDIANAPOLIS, March 14, 2018

Originally issued by the ARB in 2014, the dual Executive Order (EO) is required to be reviewed for renewed eligibility on a model year basis. The paired Allison electric hybrid-propulsion system and Cummins engine is used in both straight and articulated transit buses.

"We appreciate ARB's continued renewal," said Greg Mann, director of mobile source emissions activities for Allison Transmission. "Allison was the first electric hybrid-propulsion system to be certified in California for transit buses and coaches, and we remain proud to offer a trusted product that reduces fuel consumption and emissions." 

The Allison H 40/50 EP has been proven to improve fuel economy up to 25 percent over similar diesel buses. Additionally, its regenerative braking capability can significantly extend the brake change interval by as much as 350 percent.

"Cummins is pleased the Allison electric hybrid-propulsion system has received 2018 ARB certification," said Brian Wilson, General Manager, Global Bus Business, Cummins Inc. "We believe the latest Cummins and Allison clean diesel power system will provide our bus customers an even more reliable and environmentally-friendly powertrain to help them be as successful as possible. For 2018, our latest generation of B6.7 and L9 engines are enhanced with improved fuel economy, and improved uptime, reducing overall costs for customers."

The Cummins B6.7 and L9 diesel-electric hybrid engines feature proven technology designed and developed in-house that is optimized to deliver the efficiency, durability and performance on which transit bus customers depend. The B6.7 diesel-electric hybrid engine is rated at 280 hp (209kW) while the L9 diesel-electric hybrid engine is rated at 330 hp (246kW) for the transit bus market.