Energy-saving technologies for construction machinery: a review of electro-hydraulic pump-valve coordinated system

Energy conservation and emission reduction of construction machinery are the focus of current research. The traditional excavator, whose hydraulic pump is driven by the engine, has high fuel consumption and emissions. Furthermore, it is difficult to match the working point of the engine to that of the hydraulic pump. Current pure electric drive technology has the advantages of zero pollution and low noise, and the motor used has the advantages of fast response and a wide speed range. Based on the characteristics of the pure electric drive technology, a positive flow system based on variable speed constant displacement instead of a variable displacement pump for pure electric construction machinery is put forward to realize the flow-matching of the whole machine. The basic structure and working principle were introduced. The control process was analyzed. The controllability and energy saving of the proposed system were tested through simulation and experimental analysis. The research results showed that the controllability of the proposed positive flow system was comparable to that of the traditional throttling speed-regulating control system. The energy-saving efficiency of the proposed positive flow system is increased by 35.2% compared to that of the tradition control system. To further exploit the strong overload capacity of electric motors of electric construction machinery and solve the insufficient power under sudden load, research on constant power control will be carried out in the future.

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Design of Control System for Concrete Mixing Station Based on PLC and Touch Screen

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.317-319.2473 ◽

2011 ◽

Vol 317-319 ◽

pp. 2473-2476

Author(s):

Huan Zhang

Keyword(s):

Control System ◽

Energy Saving ◽

Touch Screen ◽

Automatic Production ◽

Construction Machinery ◽

Practical Operation ◽

And Control ◽

Technology Processes ◽

Control Accuracy ◽

Concrete Mixing Station

On the basis of analyzing technology processes and control demands of concrete mixing station, a design of control system for this construction machinery based on SIEMENS S7-300 PLC and eView touch screen was introduced in this paper, including hardware selection, PLC LAD diagram programming and HMI design, etc. All expected demands for weighing, batching, deposit, mixing, unloading, conveying of the whole technology processes of concrete mixing are reached, and a totally automatic production can be realized also. The practical operation verifies that the control system is highly reliable and stable, and it greatly enhances the control accuracy and meets the equipments requirements of energy-saving.

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Overview and Optimized Design for Energy Recovery Patents Applied to Hydraulic Systems

Exploring Critical Approaches of Evolutionary Computation - Advances in Computer and Electrical Engineering ◽

10.4018/978-1-5225-5832-3.ch013 ◽

2019 ◽

pp. 256-285

Author(s):

Marwa Elhajj ◽

Rafic Younes ◽

Sebastien Charles

Keyword(s):

Energy Saving ◽

Energy Recovery ◽

Optimization Technique ◽

Hydraulic Systems ◽

Energy Recovery System ◽

Construction Machinery ◽

Recovery System ◽

Hydraulic Excavators ◽

Complete Study ◽

Low Efficiency

Due to their large application quantities with extremely low efficiency, pollutant emissions, high fuel consumption, and oil price, researches on the environment protection and the energy saving of construction machinery, especially hydraulic excavators, become very necessary and urgent. In this chapter, the authors proposed a complete study for the excavators' hydraulic energy recovery systems. This study is divided into two parts. In the first one, an overview for the energy saving principles is discussed and classed based on the type of the energy recovered. In the second part and once the energy recovery system is selected, the authors proposed a new approach to design the energy recovery system under a typical working cycle. This approach, the global optimization method for parameter identification (GOMPI), uses an optimization technique coupled with the simulated model on simulation software. Finally, results concluded that applying GOMPI model was an efficient solution as it proves its accuracy and efficiency to design any energy recovery patent applied to hydraulic systems.

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Research of Electronic Energy Saving Control Technology in Construction Machinery

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.443-444.272 ◽

2012 ◽

Vol 443-444 ◽

pp. 272-276 ◽

Cited By ~ 1

Author(s):

Hui Xian Han ◽

Mao Fu Liu ◽

Xian Li Cao

Keyword(s):

Energy Saving ◽

Development Trend ◽

Electronic Energy ◽

Control Technology ◽

Global Energy ◽

Construction Machinery ◽

Energy Saving Technology ◽

Control Technologies ◽

Saving Effect ◽

Energy Saving Control

This paper analyzed the typical power process of construction machinery, led to the idea of energy saving and the concept of generalized energy saving, put forward energy saving control system of construction machinery according to the present two typical control technologies of construction machinery. In the quantitative analysis of energy saving effect, aiming to the shortcomings of the current energy saving technology difficult to quantify, the paper puts forward a formula of the global energy saving target, explains comparison and evaluation methods of energy saving effect, and gives the concrete realization modes of the global energy saving and generalized energy saving: full electronic control technology and distributed control technology. Finally the paper prospects the future development trend of energy saving technology in construction machinery.

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Displacement Control of Hydraulic Pump with Servo System for Energy Saving

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.148-149.942 ◽

2011 ◽

Vol 148-149 ◽

pp. 942-946 ◽

Cited By ~ 1

Author(s):

Jin Сhun Song ◽

Guan Gan Ren ◽

Yu Jie Ren ◽

Bai Sen Zhang

Keyword(s):

Mathematical Modeling ◽

Energy Saving ◽

Pressure Loss ◽

Hydraulic System ◽

Actual Situation ◽

Displacement Control ◽

Hydraulic Pump ◽

Servo Valve ◽

Governing System ◽

Large Pressure

The worst problem we are facing in the hydraulic system is the serious loss of energy, due to bad matching between the power components and the actuators and the large pressure loss when oil flowing though the various hydraulic elements, especially in speed governing system. However, Servo pump which is introduced in this paper can cover the problems mentioned above finely. The most difficult thing is its mathematical modeling, in the paper, it is established according to the actual situation. Here, the modeling between servo valve and cylinder, between cylinder and pump are established respectively, then these are connected by geometry relationship, finally ,the whole modeling is completed.

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256 Energy Saving of Oil Hydraulic Pump Unit by Idling Stop Using Accumulator

The Proceedings of Yamanashi District Conference ◽

10.1299/jsmeyamanashi.2010.58 ◽

2010 ◽

Vol 2010 (0) ◽

pp. 58-59 ◽

Cited By ~ 2

Author(s):

Katumasa Suzuki ◽

Ken Sugimura ◽

Sinpei Ota ◽

Teturou Doi

Keyword(s):

Energy Saving ◽

Hydraulic Pump ◽

Pump Unit

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Signed-Distance Fuzzy Sliding Mode Position Control for an Energy-Saving Electro-Hydraulic Control System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.284-287.2315 ◽

2013 ◽

Vol 284-287 ◽

pp. 2315-2319

Author(s):

Mao Hsiung Chiang ◽

Chung Chieh Cheng ◽

Liang Wang Lee ◽

Maoh Chin Jiang ◽

Jhih Hong Lin

Keyword(s):

Energy Saving ◽

Rotational Speed ◽

Position Control ◽

Sliding Mode ◽

Axial Piston Pump ◽

Hydraulic Pump ◽

Controlled Systems ◽

Constant Displacement ◽

Fuzzy Sliding Mode ◽

Axial Piston

Electro-Hydraulic pump-controlled servo systems that have high energy-efficiency can serve as energy-saving system. This paper aims to investigate the servo performance of the electro-hydraulic pump-controlled systems driven by an AC servo motor with variable rotational speed. A constant displacement axial piston pump is used in this research. Thus, the new hydraulic pump-controlled system with an AC motor servo and a constant displacement axial piston pump is investigated for position control of hydraulic servo machines. For that, this paper also develops the control strategy, sign-distance fuzzy sliding mode control, which can simplify the fuzzy rule base through the sliding surface. The developed high response variable rotational speed pump-controlled systems controlled by SD-FSMC are implemented and verified experimentally for positioning control in different stroke and loading conditions.

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Analyse the Influence Factors of Energy-Saving and Emission-Reduction in Asphalt Pavement Construction

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.774-776.913 ◽

2013 ◽

Vol 774-776 ◽

pp. 913-918

Author(s):

Li Du ◽

Yu Mei Li ◽

Cong Hao Li

Keyword(s):

Energy Consumption ◽

Energy Saving ◽

Emission Reduction ◽

Heating Temperature ◽

Asphalt Pavement ◽

Asphalt Mixture ◽

Influence Factors ◽

Construction Process ◽

Construction Machinery ◽

Pavement Construction

Base on the process of asphalt pavement construction, analyse the influence factors of energy-saving and emission-reduction in asphalt pavement construction. Research shows thatduring the asphalt pavement construction process, all kinds of construction machinery are the main source of energy consumption and emissions; Asphalt mixture also emission part of gases itself, which closely related with the heating temperature of the mixture.

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