Improving energy efficiency of heavy-duty vehicles

A systemic perspective and some case studies

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Today's advanced market economy relies in logistic operations that are both reliable and timely. Road transport is a major contributor to this daily logistics, but also a major consumer of fossil fuels, hence producing a lot of carbon emissions. Furthermore, most of the technologies recently introduced to cut down fuel use and emissions in passenger cars are not practical in heavy trucks running long-distances. This paper focuses on how to more systematically address the energy process and gives some case-examples of progress made in real-world HDVs. Several studies at VTT have been addressing energy use in HDVs. It has become evident that for real improvements in energy efficiency, the complete vehicle must be taken into consideration. We must have better understanding of the factors influencing the energy demand, and not just how to make engines more fuel efficient. For that purpose a break-down of energy use in a heavy truck-trailer combination has been made. The objective for this approach was to give proportions for the various contributors for the energy use, and be able to assess, what kind of progress in each field could be possible. Apart from the holistic and systemic approach, we need metrics to measure the energy consumption in such a way that the results reflect real-world situation as good as possible. Using a chassis dynamometer capable of taking a full-size vehicle and replicating its on-road driving operations has proven to be an excellent tool in terms of precision and repeatability of the results. Adding also road gradient (uphill/downhill) simulation further enhances the realism, and improves the accuracy how closely the duty-cycle is reflected in engine speed/load sequence compared to on-road driving. Eventually, this match is the measure for the success of the method. In case studies several areas of energy use has been addressed, and the potentials for savings in real-use has been determined. These include e.g., choice of tyres for optimum rolling losses without compromising safety and most recently aerodynamic improvements for the complete truck-trailer combination for reduced drag. The paper will portray the achievable energy savings identified in these studies. Test results demonstrate that energy efficiency of heavy trucks can be improved, but for a long-standing and substantial impact the complete design of the vehicle should be viewed from the energy efficiency perspective.
Original languageEnglish
Title of host publicationProceedings of the FISITA 2012 World Automotive Congress
PublisherSpringer
Pages51-63
ISBN (Electronic)978-3-642-33835-9
ISBN (Print)978-364233834-2
DOIs
Publication statusPublished - 2013
MoE publication typeNot Eligible
EventFISITA 2012 World Automotive Congress - Beijing, China
Duration: 27 Nov 201230 Nov 2012

Publication series

NameLecture Notes in Electrical Engineering
PublisherSpringer-Verlag
Volume195
ISSN (Print)1876-1100

Conference

ConferenceFISITA 2012 World Automotive Congress
CountryChina
CityBeijing
Period27/11/1230/11/12

Fingerprint

Truck trailers
Energy efficiency
Trucks
Logistics
Engines
Dynamometers
Chassis
Passenger cars
Fossil fuels
Tires
Drag
Aerodynamics
Energy conservation
Energy utilization
Carbon

Keywords

  • heavy transport vehicles
  • energy use
  • energy savings
  • test methodology
  • design

Cite this

Laurikko, J., Erkkilä, K., Laine, P., & Nylund, N-O. (2013). Improving energy efficiency of heavy-duty vehicles: A systemic perspective and some case studies. In Proceedings of the FISITA 2012 World Automotive Congress (pp. 51-63). Springer. Lecture Notes in Electrical Engineering, Vol.. 195 https://doi.org/10.1007/978-3-642-33835-9_6
Laurikko, Juhani ; Erkkilä, Kimmo ; Laine, Petri ; Nylund, Nils-Olof. / Improving energy efficiency of heavy-duty vehicles : A systemic perspective and some case studies. Proceedings of the FISITA 2012 World Automotive Congress . Springer, 2013. pp. 51-63 (Lecture Notes in Electrical Engineering, Vol. 195).
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Laurikko, J, Erkkilä, K, Laine, P & Nylund, N-O 2013, Improving energy efficiency of heavy-duty vehicles: A systemic perspective and some case studies. in Proceedings of the FISITA 2012 World Automotive Congress . Springer, Lecture Notes in Electrical Engineering, vol. 195, pp. 51-63, FISITA 2012 World Automotive Congress, Beijing, China, 27/11/12. https://doi.org/10.1007/978-3-642-33835-9_6

Improving energy efficiency of heavy-duty vehicles : A systemic perspective and some case studies. / Laurikko, Juhani; Erkkilä, Kimmo; Laine, Petri; Nylund, Nils-Olof.

Proceedings of the FISITA 2012 World Automotive Congress . Springer, 2013. p. 51-63 (Lecture Notes in Electrical Engineering, Vol. 195).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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AB - Today's advanced market economy relies in logistic operations that are both reliable and timely. Road transport is a major contributor to this daily logistics, but also a major consumer of fossil fuels, hence producing a lot of carbon emissions. Furthermore, most of the technologies recently introduced to cut down fuel use and emissions in passenger cars are not practical in heavy trucks running long-distances. This paper focuses on how to more systematically address the energy process and gives some case-examples of progress made in real-world HDVs. Several studies at VTT have been addressing energy use in HDVs. It has become evident that for real improvements in energy efficiency, the complete vehicle must be taken into consideration. We must have better understanding of the factors influencing the energy demand, and not just how to make engines more fuel efficient. For that purpose a break-down of energy use in a heavy truck-trailer combination has been made. The objective for this approach was to give proportions for the various contributors for the energy use, and be able to assess, what kind of progress in each field could be possible. Apart from the holistic and systemic approach, we need metrics to measure the energy consumption in such a way that the results reflect real-world situation as good as possible. Using a chassis dynamometer capable of taking a full-size vehicle and replicating its on-road driving operations has proven to be an excellent tool in terms of precision and repeatability of the results. Adding also road gradient (uphill/downhill) simulation further enhances the realism, and improves the accuracy how closely the duty-cycle is reflected in engine speed/load sequence compared to on-road driving. Eventually, this match is the measure for the success of the method. In case studies several areas of energy use has been addressed, and the potentials for savings in real-use has been determined. These include e.g., choice of tyres for optimum rolling losses without compromising safety and most recently aerodynamic improvements for the complete truck-trailer combination for reduced drag. The paper will portray the achievable energy savings identified in these studies. Test results demonstrate that energy efficiency of heavy trucks can be improved, but for a long-standing and substantial impact the complete design of the vehicle should be viewed from the energy efficiency perspective.

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Laurikko J, Erkkilä K, Laine P, Nylund N-O. Improving energy efficiency of heavy-duty vehicles: A systemic perspective and some case studies. In Proceedings of the FISITA 2012 World Automotive Congress . Springer. 2013. p. 51-63. (Lecture Notes in Electrical Engineering, Vol. 195). https://doi.org/10.1007/978-3-642-33835-9_6