A statistical operating cycle description for prediction of road vehicles' energy consumption
Journal article, 2019

We propose a novel statistical description of the physical properties of road transport operations by using stochastic models arranged in a hierarchical structure. The description includes speed signs, stops, speed bumps, curvature, topography, road roughness and ground type, with a road type introduced at the top of the hierarchy to group characteristics that are often connected. Methods are described how to generate data on a form (the operating cycle format) that can be used in dynamic simulations to estimate energy usage and CO2 emissions. To showcase the behaviour of the description, two examples are presented using a modular vehicle model for a heavy-duty truck: a sensitivity study on impacts from changes in the environment, and a comparison study on a real goods transport operation with respect to energy usage. It is found that the stop intensity and topography amplitude have the greatest impact in the sensitivity study (8.3% and 9.5% respectively), and the comparison study implies that the statistical description is capable of capturing properties of the road that are significant for vehicular energy usage. Moreover, it is discussed how the statistical description can be used in a vehicle design process, and how the mean CO2 emissions and its variation can be estimated for a vehicle specification.

Road description

stochastic road model

hierarchical Markov model

commercial vehicles

CO2 emissions

operating cycle

Author

Pär Pettersson

Chalmers, Mechanics and Maritime Sciences, Vehicle Engineering and Autonomous Systems

Pär Johannesson

RISE

Bengt J H Jacobson

Chalmers, Mechanics and Maritime Sciences, Vehicle Engineering and Autonomous Systems

Fredrik Bruzelius

Chalmers, Mechanics and Maritime Sciences, Vehicle Engineering and Autonomous Systems

Lars Fast

RISE

Sixten Berglund

Chalmers, Mechanics and Maritime Sciences, Vehicle Engineering and Autonomous Systems

Transportation Research Part D: Transport and Environment

1361-9209 (ISSN)

Vol. 73 205-229

COVER – Real world CO2 assessment and Vehicle enERgy efficiency

Swedish Energy Agency, 2018-01-01 -- 2021-12-31.

VINNOVA, 2018-01-01 -- 2021-12-31.

Operating cycle energy management (OCEAN)

Swedish Energy Agency, 2014-01-01 -- 2017-12-31.

Driving Forces

Sustainable development

Areas of Advance

Transport

Subject Categories

Infrastructure Engineering

Vehicle Engineering

Probability Theory and Statistics

DOI

10.1016/j.trd.2019.07.006

More information

Latest update

7/12/2019