Allison Heavy-Duty Hybrid System Can Now Power Components


Allison Transmission is rolling out a new option complementing its H 40/50 EP hybrid propulsion system for transit buses and coaches that enables the full electrification of components onboard these vehicles.

Allison co-developed this Increased Accessory Power II (IAP II) system with Vanner Inc. It is a customizable electric distribution platform that provides power from the hybrid system to accessory components such as electric air conditioning, electric air compressors and power steering systems. IAP II includes either a single or dual hybrid Beltless Alternator (HBA).

‘Allison's standard H 40/50 EP system typically improves fuel economy up to 25 percent over standard diesel buses,’ says Michael G. Headly, senior vice president of global marketing, sales and service for Allison Transmission. ‘When using a Vanner HBA with our system, a number of transit agencies in the U.S. have reported an additional average fuel economy improvement of 16 percent, for a total improvement up to 41 percent or more.’

‘Full electrification of a hybrid bus is the single most advantageous option a transit authority can realize that will improve fuel economy, reduce emissions and lower maintenance costs,’ adds Steve Funk, president of Vanner. ‘The Allison H 40/50 EP hybrid already has a proven track record as a reliable sustainability solution. IAP II improves on the hybrid's efficiency by distributing the hybrid power throughout the entire bus.’

Notify of
Inline Feedbacks
View all comments