Numerical Analysis of Energy Recovery of Hybrid Loader Actuators Based on Parameters Optimization

Mu, Hongyun; Luo, Yanlei; Luo, Yu; Chen, Lunjun

doi:10.3390/act11090260

Cited by 7 publications

(6 citation statements)

References 14 publications

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“…At present, the energy-saving research on EWL are mainly about the efficiency of batteries [39], the energy recovery [22], the hybrid technology [28] and others [11], [40]. The research ignored the influence of the mechanical characteristics of EWL in its shoveling condition and running condition.…”

Section: Discussionmentioning

confidence: 99%

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Mechanical Characteristics of Distributed Electric Wheel Loader in Shoveling Condition

Fei,

Shenrui,

Voon Wong

et al. 2023

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Multi-bridge centralized drive wheel loaders can produce parasitic power to waste energy and aggravate tire wear. Distributed Electric Wheel Loader(DEWL) is a new structure with two drive motors that can be controlled independently or in concert. Hence, this study investigates the mechanical characteristics of DEWL in its shoveling condition. Firstly, for the DEWL, dynamic models are established including running and shoveling conditions, on the basis of automobile theory. Secondly, a simplified structural model of DEWL is used to construct the mechanical equations, and the theoretical derivation is utilized to analyze the forces on wheels during different driving modes of running and shoveling conditions. Finally, the free shoveling of dry sands and gravel materials is tested by a ZL50GV-EV DEWL, and the drive forces of three drive modes on horizontal concrete pavement are tested. The results show that the parasitic power is generated when the driving motor has a larger speed than that of the other motor, which is caused by the movement of the loader's center of gravity. The driving torques generated by the motors are basically the same when the DEWL is in front-drive mode and rear-drive mode at the setting speed of 600rpm, whether it is running forward or backward, with a torque fluctuation of 0.16%-1.28% and a power fluctuation of 0.02%-1.29%. The DEWL consumes more power in dual-drive mode than in single drive if it is controlled in speed-target mode.

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Section: Discussionmentioning

confidence: 99%

“…EWLs are driven by electric motors, which produce driving force to transmission system and also generate electricity when the velocity decreases [22]. The motor has the mechanical characteristics of high torque at low speed, which is suitable for WLs in shoveling and carrying material conditions [23].…”

Section: Automotive Experiences 337mentioning

confidence: 99%

Mechanical Characteristics of Distributed Electric Wheel Loader in Shoveling Condition

Fei,

Shenrui,

Voon Wong

et al. 2023

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“…, ω sg T sg ≤ 0 (10) where s dis and s char are the discharge coefficient and charging coefficient, respectively, and can be expressed as Equation (11) [40].…”

Section: Strategy For Energy Managementmentioning

confidence: 99%

“…Hybrid technology has emerged as a promising solution to reduce energy consumption in hydraulic excavators ((HEs)) [7,8]. HEs, mainly divided into hydraulic and electric hybrids, have been developed and commercialized, offering potential energy savings [9,10].…”

Section: Introductionmentioning

confidence: 99%

Investigation and Optimization of Energy Consumption for Hybrid Hydraulic Excavator with an Innovative Powertrain

Nguyen,

Do,

Ahn

2023

Actuators

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This paper presents an innovative powertrain design and an energy regeneration system for hybrid hydraulic excavators to reduce energy consumption and emissions. The proposed system is designed to maximize engine efficiency and make full use of the energy gained from boom and arm retraction. The powertrain features an innovative design that incorporates a continuously variable transmission (CVT), which drives the main pump. It enables precise control of both the engine’s speed and torque, ensuring that the engine operates within the high-efficiency range. The energy regeneration system is applied to regenerate the potential energy of the boom and arm, which can be used to either charge the battery or directly supply power to the main pump. Moreover, an energy management strategy based on an equivalent consumption minimization strategy is used to distribute the power while offering maximum engine efficiency. When compared with the existing hybrid system and conventional system, the simulation results indicated that the proposed approach achieves energy-saving efficiencies of 16.9% and 77.1%, respectively, at high velocities and 22.25% and 53.5%, respectively, at medium velocities. This research signifies a promising advancement for sustainable and efficient hydraulic excavator operations.

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“…The actuator is the key component of the active vibration control and the important part of active control system, and it has a wide range of applications in the fields of machinery, robotics and aerospace [1][2][3][4][5][6][7]. The propellant actuator is a kind of driver that ignites the propellant through electric energy and uses the pressure of the propellant gas to apply the work [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Numerical Study on Dynamic Response of Propellant Actuator

Zhao

Shi

et al. 2022

Actuators

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In order to solve the complexity of the structure, assembly process, component contact state and working process of the propellant actuator by conventional methods, a novel design method based on theoretical and numerical analysis was proposed. The internal ballistic model of the propellant actuator was established based on the classical internal ballistic theory, and the pressure–time characteristic curve of the propellant gas was then obtained. According to the characteristic curve, the dynamic characteristics of the piston under different design conditions of the shear slice were calculated by numerical simulation. The results show that the pressure–time characteristics of the internal ballistic model were in good agreement with the experimental data, indicating that the the internal ballistic model of the propellant actuator is reasonable. Additionally, the structure optimization design and drop safety of the propellant actuator were carried out using the finite element method. It was found that with increasing the propellant charge, the movement time of the piston decreases and the maximum velocity increases. Moreover, the critical values of the propellant charge are 5 mg, 6 mg, 7 mg for the thickness of the shear slice of 0.2 mm, 0.3 mm and 0.4 mm, respectively.

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Numerical Analysis of Energy Recovery of Hybrid Loader Actuators Based on Parameters Optimization

Cited by 7 publications

References 14 publications

Mechanical Characteristics of Distributed Electric Wheel Loader in Shoveling Condition

Mechanical Characteristics of Distributed Electric Wheel Loader in Shoveling Condition

Investigation and Optimization of Energy Consumption for Hybrid Hydraulic Excavator with an Innovative Powertrain

Theoretical and Numerical Study on Dynamic Response of Propellant Actuator

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