Allison Transmission has announced the launch of its zero emission vehicle (ZEV)-capable electric hybrid system, the eGen Flex.
- Provides bus fleets with full electric engine-off propulsion and accessory power operation capability
- Includes new drive unit, inverter and rechargeable energy storage system
- Drive unit includes disconnect clutch that enables engine-off capability
- Inverter features package improvement that reduces its footprint and weight
- Inverter is now water ethylene glycol (WEG) cooled to eliminate oil lines, decrease installation complexity, reduce maintenance expenses, and increase uptime
- Energy storage system incorporates latest Lithium Titanate (LTO) technology which significantly increases energy density, allows for faster charging and enables pure electric (engine off) extended range capability
- Offered in CertPlus model configurations for sale in California Air Resources Board (CARB)-adopting states
- Two models available, eGen Flex and eGen Flex Max
- eGen Flex will be similar in feature set and capability to the Allison H 40/50 EP electric hybrid propulsion system
- eGen Flex Max will offer fully electric propulsion for up to 10 mi. (16.1 km), dependent upon duty cycle and accessory load requirements
- Similar to existing H 40/50 EP nomenclature, eGen Flex and eGen Flex Max will also be available in "40" and "50" configurations based on fleet torque requirements
- Increased Accessory Power 2 will be available with eGen Flex, and will be required with eGen Flex Max
- Accessory Power 2 electrifies vehicle accessory systems, allowing them to operate at optimal efficiency point, and with clean and quiet electric power to reduce emissions and strain on the engine
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