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

    SeriesLecture Notes in Electrical Engineering
    Volume195
    ISSN1876-1100

    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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    title = "Improving energy efficiency of heavy-duty vehicles: A systemic perspective and some case studies",
    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.",
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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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    N2 - 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.

    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