A Lowpass Filtered Pulse & Coast Speed Trajectory Generator

University of Notre Dame Background
Electric vehicles are an emerging market and attractive to customers in city or suburban areas who wish to decrease their carbon footprint. These vehicles can provide superior acceleration and smoother drive experiences compared to vehicles powered by internal combustion engines (ICE).
While EVs have many benefits, one of their greatest weaknesses is their range. Typical EVs on the market today can travel 250 miles on average, compared to the ~400 miles that cars which run on ICEs can travel. Today, electric motors operate by a system called “pulse and coast”, where power is applied and withdrawn abruptly to leap the engine into the most efficient operating zone. While effective, this method has rapid changes in acceleration which passengers can find uncomfortable.
Technology Overview
Researchers at the University of Notre Dame have invented a system concept which uses a low pass filter with inputs similar to that of cruise control to produce an energy efficient acceleration. Simulation has proven this method to double the range of an EV by saving 50% of its energy and reduce jerk by orders of magnitude, maximizing passenger comfort.


Save 50% of EV energy allowing for double the range
Jerk reduced by orders of magnitude

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