Mack Predictive Cruise can increase fuel efficiency by up to 1%, Mack stated in the release, and does not require a constant GPS connection. After a short connection to GPS, Mack Predictive Cruise recognizes the hill, sends the communication to mDRIVE, which automatically knows the optimal speed and gear strategy for the upcoming terrain.
Mack Predictive Cruise operates by constantly monitoring speed, engine load, weight, and the road gradient in order to select the best gear for the road ahead. When approaching a hill, Predictive Cruise allows slightly more speed. The mDRIVE AMT then maintains the highest gear possible, remaining in that gear and preventing downshifts if unnecessary to crest the hill. Econo-Roll, which temporarily disengages the driveline before the downhill descent, allows the truck to roll, reducing fuel consumption.
When traveling downhill, Mack Predictive Cruise works to maintain vehicle speed, utilizing kinetic energy and softly applying the engine brake. Because the hill is stored in the vehicle’s memory, Predictive Cruise recognizes it and knows when the gradient will even out, allowing the truck to maintain its speed for the next incline.