Comparative Energy Analysis of a Load Sensing System and a Zonal Hydraulics for a 9-Tonne Excavator
With the rising demand for energy efficiency, displacement-controlled or so-called pump-controlled systems have become an attractive research topic for applications in construction machinery and other off-road vehicles. Pump-controlled systems can be implemented with electro-hydrostatic actuators as...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Actuators |
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| Online Access: | https://www.mdpi.com/2076-0825/9/2/39 |
| _version_ | 1797567416181456896 |
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| author | Paolo Casoli Fabio Scolari Tatiana Minav Massimo Rundo |
| author_facet | Paolo Casoli Fabio Scolari Tatiana Minav Massimo Rundo |
| author_sort | Paolo Casoli |
| collection | DOAJ |
| description | With the rising demand for energy efficiency, displacement-controlled or so-called pump-controlled systems have become an attractive research topic for applications in construction machinery and other off-road vehicles. Pump-controlled systems can be implemented with electro-hydrostatic actuators as electro-hydraulic zones, which are located next to the end actuator as a replacement for the traditional valve-controlled hydraulic actuation systems. In this paper a 9-tonne class excavator is utilized as a study case. A mathematical model of the conventional machine, validated with tests carried out on both the excavator and the single hydraulic components, was previously developed within the Simcenter AMESim<sup>©</sup> environment. This mathematical model was modified with electric components for simulating a zonal hydraulics excavator and compared with a conventional load sensing (LS) machine. The energy efficiencies of both the LS circuit and the new solution were evaluated for typical duty cycles, pointing out the obtainable energy efficiency improvements, which were mainly due to the absence of the directional valves and pressure compensators. The results also point out the effect of the pipe losses when the circuit layout requires the pipe for connecting the pump with the actuator; moreover, the effect of a diesel engine downsizing on the energy saving was evaluated. |
| first_indexed | 2024-03-10T19:41:33Z |
| format | Article |
| id | doaj.art-2d3bee0b52514eb09781e2e11751bd3f |
| institution | Directory Open Access Journal |
| issn | 2076-0825 |
| language | English |
| last_indexed | 2024-03-10T19:41:33Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Actuators |
| spelling | doaj.art-2d3bee0b52514eb09781e2e11751bd3f2023-11-20T01:08:13ZengMDPI AGActuators2076-08252020-05-01923910.3390/act9020039Comparative Energy Analysis of a Load Sensing System and a Zonal Hydraulics for a 9-Tonne ExcavatorPaolo Casoli0Fabio Scolari1Tatiana Minav2Massimo Rundo3Department of Engineering and Architecture, University of Parma, 43124 Parma, ItalyDepartment of Engineering and Architecture, University of Parma, 43124 Parma, ItalyFaculty of Engineering and Natural Sciences, IHA Innovative Hydraulics and Automation, Tampere University, FI-33720 Tampere, FinlandDepartment of Energy, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Turin, ItalyWith the rising demand for energy efficiency, displacement-controlled or so-called pump-controlled systems have become an attractive research topic for applications in construction machinery and other off-road vehicles. Pump-controlled systems can be implemented with electro-hydrostatic actuators as electro-hydraulic zones, which are located next to the end actuator as a replacement for the traditional valve-controlled hydraulic actuation systems. In this paper a 9-tonne class excavator is utilized as a study case. A mathematical model of the conventional machine, validated with tests carried out on both the excavator and the single hydraulic components, was previously developed within the Simcenter AMESim<sup>©</sup> environment. This mathematical model was modified with electric components for simulating a zonal hydraulics excavator and compared with a conventional load sensing (LS) machine. The energy efficiencies of both the LS circuit and the new solution were evaluated for typical duty cycles, pointing out the obtainable energy efficiency improvements, which were mainly due to the absence of the directional valves and pressure compensators. The results also point out the effect of the pipe losses when the circuit layout requires the pipe for connecting the pump with the actuator; moreover, the effect of a diesel engine downsizing on the energy saving was evaluated.https://www.mdpi.com/2076-0825/9/2/39excavatorelectro-hydrostatic actuatorload sensingenergy savingpump-controlled systemszonal hydraulics |
| spellingShingle | Paolo Casoli Fabio Scolari Tatiana Minav Massimo Rundo Comparative Energy Analysis of a Load Sensing System and a Zonal Hydraulics for a 9-Tonne Excavator Actuators excavator electro-hydrostatic actuator load sensing energy saving pump-controlled systems zonal hydraulics |
| title | Comparative Energy Analysis of a Load Sensing System and a Zonal Hydraulics for a 9-Tonne Excavator |
| title_full | Comparative Energy Analysis of a Load Sensing System and a Zonal Hydraulics for a 9-Tonne Excavator |
| title_fullStr | Comparative Energy Analysis of a Load Sensing System and a Zonal Hydraulics for a 9-Tonne Excavator |
| title_full_unstemmed | Comparative Energy Analysis of a Load Sensing System and a Zonal Hydraulics for a 9-Tonne Excavator |
| title_short | Comparative Energy Analysis of a Load Sensing System and a Zonal Hydraulics for a 9-Tonne Excavator |
| title_sort | comparative energy analysis of a load sensing system and a zonal hydraulics for a 9 tonne excavator |
| topic | excavator electro-hydrostatic actuator load sensing energy saving pump-controlled systems zonal hydraulics |
| url | https://www.mdpi.com/2076-0825/9/2/39 |
| work_keys_str_mv | AT paolocasoli comparativeenergyanalysisofaloadsensingsystemandazonalhydraulicsfora9tonneexcavator AT fabioscolari comparativeenergyanalysisofaloadsensingsystemandazonalhydraulicsfora9tonneexcavator AT tatianaminav comparativeenergyanalysisofaloadsensingsystemandazonalhydraulicsfora9tonneexcavator AT massimorundo comparativeenergyanalysisofaloadsensingsystemandazonalhydraulicsfora9tonneexcavator |