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Fuel efficiency analysis of selected hydraulic hybrids in a wheel loader application

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


Original languageEnglish
Title of host publicationProceedings of the BATH/ASME 2018 Symposium on Fluid Power and Motion Control FPMC2018
Subtitle of host publicationBath, UK, September 12-14, 2018
Number of pages10
ISBN (Electronic)978-0-7918-5196-8
Publication statusPublished - 14 Sep 2018
Publication typeA4 Article in a conference publication
EventBATH/ASME Symposium on Fluid Power and Motion Control - Bath, United Kingdom
Duration: 12 Sep 201814 Sep 2018


ConferenceBATH/ASME Symposium on Fluid Power and Motion Control
CountryUnited Kingdom


There is a potential for significant improvement on fuel efficiency of many mobile machines by using hybrid technology as the Diesel engines are often driven at very inefficient operating points in these applications. The load generated by the working hydraulics of a mobile machine is often rapidly changing and contains high peak powers compared to the mean power required. This paper studies three different hydraulic hybrids in a wheel loader application. The study is based on a measured sand-loading Y-cycle. In addition to the hybrid systems, a load sensing proportional valve based reference machine and a modified machine based on independent metering valves are analyzed. All five system alternatives are analyzed systematically to enable a comparison of their fuel efficiency. The study shows that the fuel consumption of the machine can be decreased up to 28 % in such load cycle by using a suitable hydraulic hybrid system.

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