A statistical operating cycle description for prediction of road vehicles' energy consumption
Artikel i vetenskaplig tidskrift, 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

Författare

Pär Pettersson

Chalmers, Mekanik och maritima vetenskaper, Fordonsteknik och autonoma system

Pär Johannesson

RISE

Bengt J H Jacobson

Chalmers, Mekanik och maritima vetenskaper, Fordonsteknik och autonoma system

Fredrik Bruzelius

Chalmers, Mekanik och maritima vetenskaper, Fordonsteknik och autonoma system

Lars Fast

RISE

Sixten Berglund

Chalmers, Mekanik och maritima vetenskaper, Fordonsteknik och autonoma system

Transportation Research Part D: Transport and Environment

1361-9209 (ISSN)

Vol. 73 205-229

COVER – Bedömning av CO2 och energieffektivitet hos fordon i verklig användning

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

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

Driftcykelgenerering för effektiv energianvändning (OCEAN)

Energimyndigheten, 2014-01-01 -- 2017-12-31.

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Ämneskategorier

Infrastrukturteknik

Farkostteknik

Sannolikhetsteori och statistik

DOI

10.1016/j.trd.2019.07.006

Mer information

Senast uppdaterat

2019-07-12