Research on the design and control strategy for a flow-coupling-based hydraulic hybrid excavator

Xiao, Yang; Guan, Cheng; Lai, Xiaoliang

doi:10.1177/0954407013502326

Cited by 17 publications

(13 citation statements)

References 11 publications

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“…In DHH systems, hydraulic energy can be converted into mechanical energy through a hydraulic pump/motor and couple with the energy output from the ICE to form a "torque coupling structure" (TCS) similar to a parallel DEH [29], as shown in Figure 6. On the other hand, the hydraulic energy between accumulator and main pump can also be coupled directly, which is termed as a "flow coupling structure" (FCS) [30], as shown in Figure 7. In the design of DHH, to meet the design requirements of the system, additional accumulators were added in the DHH system, and different effects were generated.…”

Section: Diesel-hydraulic Hybridmentioning

confidence: 99%

“…The simulation results suggest that the system can save up to 27% of the fuel consumption compared with the non-hybrid system. In [30], a FCS system with two accumulators was introduced, as shown in Figure 9. The two accumulators were used to recover the potential energy of the boom and the rotating braking energy, respectively, and the flow can be shared between the accumulators to maintain the ideal state of charge (SOC) and maximize the energy recovery.…”

Section: Diesel-hydraulic Hybridmentioning

confidence: 99%

“…TCS system with double accumulators[31].Energies 2019, 12, x FOR PEER REVIEW 8 FCS system with two accumulators[30].…”

mentioning

confidence: 99%

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Energy Management Strategies for Hybrid Construction Machinery: Evolution, Classification, Comparison and Future Trends

Zhang

Wang

et al. 2019

Energies

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Hybrid Construction Machinery (HCM), known as an effective and crucial solution for the issues of environment pollution and energy shortage, has aroused increasing attention from manufacturers and researchers. A suitable energy management strategy is the vital technology to determine the energy saving and emission reduction performance of HCM. In the present paper, the difference between construction machinery and automobiles is first analyzed from the perspective of configuration, and the energy-based HCM configuration classification method is introduced and analyzed. Second, the development of HCM energy management strategy is reviewed along with relevant references, and the HCM energy management strategies are classified and summarized. In the meantime, the characteristics of each strategy are compared and analyzed, and the application of HCM energy management strategy is analyzed based on the relevant research results. Lastly, the state, challenges facing and the trend of HCM energy management strategy are analyzed on the levels of theory, manufacturer and market. According to the analysis, though progress has been achieved in energy management technology of HCM driven by market and policy, many challenges and problems remain in the electrification and intellectualization of HCM and the testing, application and improvement of the strategy. The contribution of this paper can be identified in three points: First, it can be referenced to solve relevant engineering problems. Second, it lays the foundation for the proposal of new ideas. Third, it highlights the state-of-the-art trends and avoids what has already been done.

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Section: Diesel-hydraulic Hybridmentioning

confidence: 99%

Section: Diesel-hydraulic Hybridmentioning

confidence: 99%

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Energy Management Strategies for Hybrid Construction Machinery: Evolution, Classification, Comparison and Future Trends

Zhang

Wang

et al. 2019

Energies

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“…In general, the model is effective, and the overall efficiency is low. Cylinders and accumulators are wildly used in excavators [20][21][22][23]. The accumulator plays a key role in hydraulic design.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics of coupling model of valve-controlled cylinder parallel accumulator

Liu

et al. 2019

Mechanics & Industry

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To solve the electro-hydraulic control problems caused by the accumulator's passive involvement, the internal principle of the valve-controlled luffing cylinder was explored based on one ship crane; comparison models with and without the accumulator were established, and experiments were performed to verify the dynamic characteristics. By comparing simulations with experimental data, it was found that in the outstretch stage of the cylinder, the accumulator releases energy, accelerates the extension of the cylinder, and increases the response velocity. However, the accumulator also reduced the precision of location control. Therefore, to effectively solve the problem of fluctuation rate in the outstretch stage, experiments were conducted to adjust the valve-core opening according to the energy-release characteristics of the accumulator. In the retracting stage of the cylinder, the accumulator absorbed oil and inhibited the pressure fluctuation of the cylinder effectively. Finally, the feasibility of the compensation solution was verified through the experiments.

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“…1 Currently, the main method of improving the efficiency of the power train system is hybrid power train systems (HPTSs). [2][3][4] The HPTSs adopt two or more power sources to drive the load [5][6][7] and to make full use of the advantage of each power source to realize energy-saving.…”

Section: Introductionmentioning

confidence: 99%

Research on the control strategy of power train systems for hybrid hydraulic excavators

Chen

Lin

Ren

et al. 2018

Advances in Mechanical Engineering

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Hybrid power technology is a practicable method for construction machinery to improve fuel utilization and reduce emissions. In this article, in order to achieve the maximum degree of energy conservation for hybrid hydraulic excavator, a study on a control strategy of the hybrid power train system for a 20-t hybrid hydraulic excavator is conducted. A rule-based method which stabilizes the engine operating points in high-efficiency area and maintains the state of charge of the ultra-capacitor in a feasible operating range is presented. Meanwhile, to improve the reliability of the ultra-capacitor, a two-stage state of charge constraint is applied. To validate the effectiveness of the control strategy, a hybrid power train system simulation loading experiment platform is built. The working characteristics and the energy conservation characteristics of the hybrid power train system are explored. Actual load profiles measured from a 20-t traditional excavator are measured and applied in the system. The experimental results show that the proposed control strategy for the hybrid power train system can improve the fuel economy of the hybrid hydraulic excavator. Meanwhile, dynamic performance of the hybrid power train system is better than that of the traditional excavator.

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Research on the design and control strategy for a flow-coupling-based hydraulic hybrid excavator

Cited by 17 publications

References 11 publications

Energy Management Strategies for Hybrid Construction Machinery: Evolution, Classification, Comparison and Future Trends

Energy Management Strategies for Hybrid Construction Machinery: Evolution, Classification, Comparison and Future Trends

Dynamic characteristics of coupling model of valve-controlled cylinder parallel accumulator

Research on the control strategy of power train systems for hybrid hydraulic excavators

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