Heavy-duty truck test cycles: combining driveability with realistic engine exercise

Heavy-duty engine certification testing uses a cycle that is scaled to the capabilities of each engine. As such, every engine should be equally challenged by the cycle's power demands. It would seem that a chassis cycle, similarly scaled to the capabilities of each vehicle, could successfully bridge the gap between "universal driveability" and "realistic engine exercise". The purpose of this paper is to present just such a cycle.