Cummins have unveiled a revolutionary all-electric powertrain in a demonstrator truck and a range extender version will follow soon.
The demonstrator truck uses a 140 KWh battery pack instead of a 12-litre engine. The weight of the electric powertrain is roughly equal to that of the removed engine, aftertreatment, transmission and fuel tank. The tractor day cab when paired with a trailer has a gross vehicle weight rating limit of 75,000 pounds.
The 18,000-pound tractor cab, dubbed AEOS after one of the four-winged horses driving the chariot of the Sun God, Helios, across the sky in Greek mythology, is just a demonstration model. The company will also show a Class 7 urban hauler tractor that is fully operational and capable of hauling a 22-ton trailer.
With a 100-mile range, the Cummins electric power train is being targeted at urban delivery vehicles and could also be ideal for short haul trips in and around supplier parks, consolidation centres and ports and other terminals. It can be recharged in about an hour at a 140 kWh charging station, and Cummins has said that its goal is to reduce this to 20 minutes by 2020, cutting down-time for its business customers. Production begins in 2019.
An extended range version, which will use an efficient, likely constant-speed, diesel engine as an on-board generator, will be available a year later. This will offer up to 300 miles between charges and could give 50% fuel savings compared to today’s diesel hybrids with zero emissions.
Other energy saving features
A regenerative braking system and the potential for solar panels on the trailer roof can send energy to the battery pack. Air drag is reduced by replacing side mirrors with an in-dash camera system. The truck achieves a significant air drag reduction via its highly streamlined design as well as a better sealed truck body and underbody – with no front radiator intrusion.
(picture courtesy of Business Wire)