Emission Aware Eco-Driving on Country Roads

Description

Eco-driving is a way to improve performance | mainly energy consumption | of road vehicles by suggesting an optimal speed and gear shifting profile which is pre-computed by a suitable optimization based on vehicle data and road profile, e.g. slopes or speed limits. Lateral acceleration of a vehicle is a critical quantity both in terms of comfort and safety, but its impact on fuel consumption or emissions is rarely considered or believed to have only a limited impact on them [1], as it does not affect directly the operating point of the engine. On country roads, however, lateral acceleration may be a critical constraint due to curves and may affect strongly both energy consumption and emissions. In this paper, the impact of lateral acceleration limits on optimal solutions to emission aware eco-driving is investigated. It is found that they may play a more critical role than longitudinal acceleration. This can be easily seen by the Pareto curves trading-off emission and fuel consumption. The rationale of this is the fact that lateral acceleration cannot be directly set by the driver, as longitudinal acceleration, but results from the combination of actual speed and topology, i.e. from previous actions of the driver. As a consequence, limits to lateral acceleration on curvy roads require significant changes to the speed profile with respect to the unconstrained case. The results from above work is validated on a high-feasibility Hardware-in-the-loop (HIL) system as well calibrated with data from Real Driving Emissions tests.

Period	10 Oct 2019
Event title	2019 Dynamic Systems and Control Conference (DSCC)
Event type	Conference
Location	United StatesShow on map