Power Matching and Energy Efficiency Improvement of Hydraulic Excavator Driven with Speed and Displacement Variable Power Source

Ge, Liu; Quan, Long; Zhang, Xiaogang; Zhang, Dong; Yang, Jing

doi:10.1186/s10033-019-0415-x

Cited by 40 publications

(23 citation statements)

References 22 publications

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“…To date, the CVPC SMIMO system has been evaluated with the swing system, the boom, and stick of hydraulic excavators [70]- [72], showing promising performances. A 6-ton excavator was prototyped with CVPC SMIMO schemes in actuators [73]. Field test results indicate that the SMIMO system can improve energy efficiency by 28.5% compared to the LS system [74].…”

Section: Coordinated Valve-pump Control Technologymentioning

confidence: 99%

A Survey of Powertrain Technologies for Energy-Efficient Heavy-Duty Machinery

Quan

Wei

et al. 2021

Proc. IEEE

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This article presents a comprehensive, multidisciplinary overview of the development of powertrain technologies for energy-efficient heavy-duty earthmoving machines. The heavy-duty earthmoving equipment industry has been among the biggest contributors to emissions globally. However, due to high power demand and multidisciplinary powertrain structures, improving the energy efficiency of heavy-duty mobile machines has been a pressing and challenging task in the industry. To cope with this challenge, hydraulics and power electronics (PE) have been the key driving forces. As such, the relative developments in both fields are covered in this article. For hydraulics, developments of efficient hydraulic circuits will be overviewed in detail along with the introduction of hydraulic energy recovery technologies.In addition, developments of PE architectures in hybrid and electrified machines will be introduced. Furthermore, potential medium-voltage dc mining site power distribution and the valves of wide bandgap devices will also be discussed with the Manuscript

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Section: Coordinated Valve-pump Control Technologymentioning

confidence: 99%

A Survey of Powertrain Technologies for Energy-Efficient Heavy-Duty Machinery

Quan

Wei

et al. 2021

Proc. IEEE

Self Cite

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“…A few applications are machine tools, wheel loaders, or rescue robots [ 3 , 4 , 5 ]. The closed-loop electrohydraulic proportional or proportional servo technology is widely used at present [ 6 , 7 , 8 ]. The closed-loop control system consists of an electro-hydraulic servo / proportional control valve, hydraulic cylinder/motor, displacement/angle sensor, and closed-loop controller [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Simulation Research of Hydraulic Stepper Drive Technology Based on High Speed On/Off Valves and Miniature Plunger Cylinders

Qiu

2021

Micromachines

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The technology for stepper drive that can achieve accurate motion in the hydraulic field has always been urgently needed in the industry. This paper proposes a hydraulic stepper drive based on five high speed on/off valves and two miniature plunger cylinders. The stepper drive discretizes the continuous flow medium into fixed small steps through the miniature plunger cylinder and realizes the state control of the drive through the logic action of the high speed on/off valve. This paper improves the current stepper drive and establishes a mathematical model to analyze the error of the drive and calculate the position of the actuator. In addition, through simulation research, the performance parameters such as the single-step step characteristic and pressure characteristic of the stepper drive are studied. The results show that, compared with the technology of current stepper drive, this stepper drive can effectively remove the “post step” phenomenon, greatly improve the stepper accuracy of the stepper drive, and have a more excellent performance.

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“…Advanced algorithms are constantly being proposed to achieve diversified control functions, such as load sensing, pressure control, and so on. Firstly, electronic load sensing (ELS) pumps are designed to replace hydro-mechanical load sensing (HMLS) pumps [5][6][7]. Song et al [8] proposed a direct load sensing electric hydrostatic actuator to automatically adjust the supplied pressure and flow.…”

Section: Introductionmentioning

confidence: 99%

A Multi-mode Electronic Load Sensing Control Scheme with Power Limitation and Pressure Cut-off for Mobile Machinery

Cheng

Sun

Ding

et al. 2021

Preprint

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In mobile machinery, hydro-mechanical pumps are increasingly replaced by electronically controlled pumps to improve the automation level, but diversified control functions(e. g., power limitation and pressure cut-off) are integrated into the electronic controller only from the pump level, leading to the potential instability of the overall system. To solve this problem, a multi-mode electrohydraulic load sensing (MELS) control scheme is proposed especially considering the switching stability from the system level, which includes four working modes of flow control, load sensing, power limitation, and pressure control. Combined with defined control priority, a switching rule including bilateral and unilateral switching for different modes is then established according to the actual requirements of mobile machinery. A comparative study was carried out based on a test rig with a 2-ton hydraulic excavator. The results show that the MELS controller can achieve the control functions of proper flow supplement, power limitation, and pressure control, which has good stability performance when switching between different control modes.

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Power Matching and Energy Efficiency Improvement of Hydraulic Excavator Driven with Speed and Displacement Variable Power Source

Cited by 40 publications

References 22 publications

A Survey of Powertrain Technologies for Energy-Efficient Heavy-Duty Machinery

A Survey of Powertrain Technologies for Energy-Efficient Heavy-Duty Machinery

Simulation Research of Hydraulic Stepper Drive Technology Based on High Speed On/Off Valves and Miniature Plunger Cylinders

A Multi-mode Electronic Load Sensing Control Scheme with Power Limitation and Pressure Cut-off for Mobile Machinery

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