scholarly journals Energy-Saving Analysis of Hydraulic Hybrid Excavator Based on Common Pressure Rail

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Wei Shen ◽  
Jihai Jiang ◽  
Xiaoyu Su ◽  
Hamid Reza Karimi
Keyword(s):  
Dynamic Response ◽  
Energy Saving ◽  
Fuel Consumption ◽  
Environment Friendly ◽  
Hydraulic Hybrid ◽  
Manufacture Process ◽  
Hybrid Excavator ◽  
Save Energy ◽  
Common Pressure Rail ◽  
Fast Dynamic

Energy-saving research of excavators is becoming one hot topic due to the increasing energy crisis and environmental deterioration recently. Hydraulic hybrid excavator based on common pressure rail (HHEC) provides an alternative with electric hybrid excavator because it has high power density and environment friendly and easy to modify based on the existing manufacture process. This paper is focused on the fuel consumption of HHEC and the actuator dynamic response to assure that the new system can save energy without sacrificing performance. Firstly, we introduce the basic principle of HHEC; then, the sizing process is presented; furthermore, the modeling period which combined mathematical analysis and experiment identification is listed. Finally, simulation results show that HHEC has a fast dynamic response which can be accepted in engineering and the fuel consumption can be reduced 21% to compare the original LS excavator and even 32% after adopting another smaller engine.

Optimal Control for the Series-Parallel Displacement Controlled Hydraulic Hybrid Excavator

2011 ◽  
Author(s):  
Joshua Zimmerman ◽  
Rohit Hippalgaonkar ◽  
Monika Ivantysynova
Keyword(s):  
Optimal Control ◽  
Fuel Consumption ◽  
Hybrid System ◽  
State Space Model ◽  
Optimal Controls ◽  
Parallel Displacement ◽  
Hydraulic Hybrid ◽  
Truck Loading ◽  
System States ◽  
Hybrid Excavator

In this paper a hydraulic hybrid system architecture for multi-actuator displacement controlled systems is analyzed. In particular the problem of optimal control for a hybrid excavator with four actuators is solved. The system states and controls are identified and classified into those which are cycle defined and those which are free to vary during the duty cycle. A state space model is derived for the hybrid system using the free states and controls and an outline of the algorithm used to apply dynamic programming to the system is described. The optimal controls and states for an aggressive truck loading cycle of the excavator are compared with suboptimal controls and states obtained using a rule based control strategy. Finally a comparison is made for the simulated fuel consumption of the system using optimal and suboptimal controls. A comparison is also made between the fuel consumption of the hybrid and non-hybrid excavators.

scholarly journals Parameter Matching Analysis of Hydraulic Hybrid Excavators Based on Dynamic Programming Algorithm

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Wei Shen ◽  
Jihai Jiang ◽  
Xiaoyu Su ◽  
Hamid Reza Karimi
Keyword(s):  
Dynamic Programming ◽  
General Principle ◽  
Hot Spot ◽  
Dynamic Programming Algorithm ◽  
Programming Algorithm ◽  
Hydraulic Hybrid ◽  
Parameter Matching ◽  
Calculation Results ◽  
Hybrid Excavator ◽  
Common Pressure Rail

In order to meet the energy saving requirement of the excavator, hybrid excavators are becoming the hot spot for researchers. The initial problem is to match the parameter of each component, because the system is tending to be more complicated due to the introduction of the accumulator. In this paper, firstly, a new architecture is presented which is hydraulic hybrid excavator based on common pressure rail combined switched function (HHES). Secondly, the general principle of dynamic programming algorithm (DPA) is explained. Then, the method by using DPA for parameter matching of HHES is described in detail. Furthermore, the DPA is translated into the M language for simulation. Finally, the calculation results are analyzed, and the optimal matching group is obtained.

Energy Saving Matching of Power Equipment for Four-Footed Robot Dog

2014 ◽  
Vol 986-987 ◽  
pp. 1222-1225
Author(s):  
Jun Wang ◽  
Chuan Hu ◽  
You Tong Zhang
Keyword(s):  
Energy Saving ◽  
Gasoline Engine ◽  
Dynamic Performance ◽  
Bench Test ◽  
Power Equipment ◽  
Pressure Feedback ◽  
Save Energy ◽  
Pump Pressure ◽  
Experimental Bench ◽  
Fast Dynamic

To increase the flexibility performance of robot dog, dynamic performance matching of power equipment in four-footed robot dog is made. Demand for power and configure in robot dog power equipment is briefly analyzed, improved backward power match between gasoline and pump is presented, power and flow rate match between gasoline and pump is calculated, control strategy based on pump pressure feedback is applied into gasoline engine control in order to save energy. With experimental bench test, experimental results showed that energy saving matching of power equipment can meet the requirement of fast dynamic meditation for robot dog .

Dual-Pump Hydraulic Hybrid Excavator with Combined Common Pressure Rail and Valve-Controlled System

2012 ◽  
Vol 233 ◽  
pp. 62-65
Author(s):  
Wei Shen ◽  
Ji Hai Jiang
Keyword(s):  
Hydraulic Excavator ◽  
Hydraulic Architecture ◽  
Design Requirement ◽  
Pump System ◽  
Controlled System ◽  
Hydraulic Hybrid ◽  
Low Efficiency ◽  
Cost Efficient ◽  
Hybrid Excavator ◽  
Common Pressure Rail

To solve the low efficiency problem of hydraulic excavator, one type of Dual-Pump hydraulic architecture with combined Common Pressure Rail (CPR) and traditional valve controlled system is presented. Firstly, we analyze the energy consumption of excavator during one cycle to know the energy distribution among each actuator. Then, the Dual-Pump system is explained to design an easy to modify, cost efficient hydraulic hybrid excavator. Moreover, we focus on the boom system and construct the model. Finally, a simulation is created and the results illustrate that the proposed system can satisfy the design requirement.

Application of Hydraulic Transformer on Energy Saving for Boom System of Hybrid Hydraulic Excavator

2017 ◽  
Vol 868 ◽  
pp. 118-123 ◽  
Author(s):  
Ying Xiao Yu ◽  
Kyoung Kwan Ahn
Keyword(s):  
Potential Energy ◽  
Energy Saving ◽  
High Efficiency ◽  
Hydraulic Excavator ◽  
Effective Solution ◽  
Construction Machinery ◽  
Hydraulic Transformer ◽  
Simulation Results ◽  
Hybrid Excavator ◽  
Save Energy

Facing the energy crisis and environmental problems, saving energy of construction machinery, especially in the hydraulic excavator is very important. Regeneration of the potential energy is an effective solution to save energy. However, the conventional hybrid excavator can’t regenerate the potential energy. This paper proposes a new structure of boom system of hydraulic excavator as well as a control strategy. The focus of the paper is using hydraulic transformer to regenerate energy and reusing the regenerated energy. The simulation is carried out by the AMESim software. From the simulation results, this new system has a high efficiency for energy saving.

Estimation of Energy Saving for Melting Process on Sewage Sludge

1991 ◽  
Vol 23 (10-12) ◽  
pp. 2011-2018 ◽  
Author(s):  
T. Murakami ◽  
K. Sasabe ◽  
K. Sasaki ◽  
T. Kawashima
Keyword(s):  
Sewage Sludge ◽  
Moisture Content ◽  
Energy Saving ◽  
Fuel Consumption ◽  
Melting Process ◽  
System Operation ◽  
Operational Conditions ◽  
Volatile Solids ◽  
Cake Moisture ◽  
Very High

The possible volume reduction and stabilization of the sewage sludge associated with the melting process are expected to be greater than with the incineration process. In addition, melted slag can be utilized. However, since the melting process requires a very high temperature to melt inorganics (ash) in the sludge, the technologies to minimize energy consumption, to establish system operation and to prolong durability of facilities should be developed. This paper discusses the auxiliary fuel consumption as follows.(1)Preparation of a model that provides the auxiliary fuel consumption of the melting system on the basis of the mass and heat balances.(2)Evaluation of the auxiliary fuel consumption in the above model using the cake moisture content, the volatile solids of the cake, the dried cake moisture content and the melting temperature as parameters.(3)Examination of the operational conditions for an energy saving melting system based on the results of (1) and (2) above.

Opportunities and Challenges in Perovskite LEDs Commercialization

2021 ◽  
Author(s):  
Kai Zhang ◽  
Ningning Zhu ◽  
Mingming Zhang ◽  
Lei Wang ◽  
Jun Xing
Keyword(s):  
Energy Saving ◽  
Energy Efficient ◽  
Light Emitting Diode ◽  
Environment Friendly ◽  
Light Emitting ◽  
Lighting Technology

Recently, the light-emitting diode (LED) has been considered as an energy-saving and environment-friendly lighting technology，which is ten times more energy efficient than conventional incandescent lights. As an emerging photoelectric material,...

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