Developed by engineers at the Southwest Research Institute, the Parallel Hybrid Electric Combination of Speeds (PECOS) powertrain was tested using federal procedures to emulate highway and city driving. PECOS achieved a fuel economy of 77 mpg for city driving and 82 mpg for highway driving.
The powertrain can accelerate a vehicle with a mass of 1,265 kilograms, an aerodynamic drag coefficient of 0.34, and a frontal area of 2 square meters from 0 to 60 mph in 14.9 seconds.