US bus-maker develops DuoPower drivetrain, twin-motor setup with twice the power of a comparable diesel
At this year’s American Public Transit Association (APTA) Annual Meeting electric bus-maker Proterra announced that it had introduced the DuoPower drivetrain for Catalyst battery-electric buses.
Using the DuoPower drivetrain, the Catalyst bus will now have almost twice the horsepower and acceleration, and will be five times more efficient than a standard diesel bus. The performance of the DuoPower drivetrain also represents a 20% increase in efficiency over the company’s standard ProDrive system.
For the Catalyst E2 max, the DuoPower drivetrain enables a nominal range of 426 miles on a single charge, far larger than the average distance of most North American transit routes. The DuoPower was recently tested at the Navistar Proving Grounds in Indiana, achieving a world record range for an electric vehicle, travelling 1,101.2 miles on a single charge.
The DuoPower drivetrain uses two electric motors that deliver an impressive 510 horsepower, accelerating a Catalyst bus from 0-20 mph in 4.5 seconds, while also achieving an industry-leading 26.1 MPGe.
In addition, it can propel a bus up a 26% grade, which is more than twice the performance of the average 35- or 40-foot diesel bus, and 72% better than competing electric transit vehicles, making it an ideal option for transit agencies with steep hills.
“Proterra’s DuoPower drivetrain unlocks new route opportunities. The link between Salt Lake City and Park City on I-80 through Parleys Canyon is an important route for us. Now, with the new drivetrain, this is achievable with electric buses,” said Destry Pollard, Park City Transit operations team leader. “We’ve been really impressed with the way Proterra Catalyst buses have handled mountain roads, and are pleased we can provide state-of-the-art performance, while preserving local air quality here in Park City.”
“When Proterra originally introduced EV technology to the transit industry, we proved that EVs could compete with fossil fuel vehicles, and replace diesel buses in most cities,” said Ryan Popple, CEO, Proterra. “But we didn’t stop there. We continued to innovate, and today we’re announcing a drivetrain that completely outperforms an internal combustion diesel or CNG engine in every major performance category – efficiency, reliability, acceleration, hill climb and passenger-carrying power. In transit, state-of-the-art vehicle performance is now defined by EV technology like our new DuoPower driveline. For fleet customers that want the very best speed, power, energy efficiency and reliability – EV is the answer.”