Review of the Energy Saving Hydraulic System Based on Common Pressure Rail

Shen, Wei; Huang, Honglei; Pang, Yu; Su, Xiaoyu

doi:10.1109/access.2017.2648642

Cited by 57 publications

(35 citation statements)

References 36 publications

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“…The test results showed that an estimated 45% of the total potential energy could be regenerated. Shen et al [12,13] studied a hydraulic hybrid excavator based on common pressure rail in which the throttling loss was eliminated completely.…”

Section: Introductionmentioning

confidence: 99%

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

Quan

Zhang

et al. 2019

Chin. J. Mech. Eng.

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Mobile machinery energy efficiency and emission pollution are the national and worldwide issues. This paper contributes in solving these problems by applying a speed variable power source. Unfortunately, almost all of the speed variable systems have the dynamic response problem when the motor starts with full load or heavy load. To address this problem, a hydraulic accumulator is used to balance the load of the power source for assisting starting of the motor and a matching method combined with speed and displacement control of the pump is proposed to improve the energy efficiency and dynamic performance simultaneously under different working conditions. Also, the power source/valve combined control strategy of an independent metering system is designed to realize flow matching of the whole system. Firstly, a test system is established to study the dynamic performance and energy efficiency of the speed variable power source with an auxiliary accumulator. Working performance and energy consumption of the power source under different rotating speeds and different loads are studied. And then, the hydraulic excavator test rig with the proposed system is constructed. Furthermore, the working performance of the excavator with the speedfixed and speed-variable strategy are studied comparatively. Results show that, compared with fixed-speed strategy, the electric power consumption during the idle period and partial load condition can be reduced about 2.05 kW and 1.37 kW. The energy efficiency of speed variable power source is about 40%-71%, which is higher than that of the fixed-speed power source by 3%-10%.

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Section: Introductionmentioning

confidence: 99%

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

Quan

Zhang

et al. 2019

Chin. J. Mech. Eng.

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“…Active suspension can solve the problem of driving comfort and control stability under different working conditions that cannot be solved by traditional passive suspension. In recent years, some new control strategies have been put forward , so research into the active suspension system combining with new control strategies has become a hot topic in recent years .…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Sliding Mode Control for Active Suspension System with Proportional Differential Sliding Mode Observer

Lin

2018

Asian Journal of Control

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In this paper, a generalized augmented transformation is considered for the quarter active suspension system with uncertainties. Specifically, the model uncertainties are converted to the augmented states and a new proportion differential sliding mode observer is used to estimate state variables and model uncertainties. A differential geometric method is applied to linearize the nonlinear suspension model. In order to weaken the vibration effect of sliding mode control force and reduce energy consumption, a fuzzy sliding mode controller is designed for the active suspension system and the fuzzy controller is applied to adjust switching control gain according to the reaching condition of sliding mode surface. The simulations are conducted to illustrate the effectiveness and advantages of this proposed observer and control strategy.

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“…Hydraulic systems have been widely used in industry because of their high power density. However, due to the low efficiency of traditional hydraulic systems, many new hydraulic energy saving technologies have been developed . A hydraulic transformer is a hydraulic component that converts the input hydraulic energy at a given pressure into output hydraulic energy at another pressure without any throttle loss, which is a key component in building a CPR (common pressure rail) system .…”

Section: Introductionmentioning

confidence: 99%

“…. This configuration is similar to the grid system, which consists of high‐pressure and low‐pressure pipes, and users simply connect the appliance to the grid in parallel . In the CPR, the main pump and hydraulic accumulator supply the high‐pressure pipe of the CPR and ensure a constant pressure; the low‐pressure pipe is connected to the fuel tank; multiple different loads are connected in parallel between the high‐pressure pipe and the low‐pressure pipe.…”

Section: Introductionmentioning

confidence: 99%

Robust Backstepping Sliding Mode Controller Investigation for a Port Plate Position Servo System Based on an Extended States Observer

Shen

Huang

Wang

2018

Asian Journal of Control

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For reducing throttling loss in a pilot oil pipe in a hydraulic system based on common pressure rail, this paper proposes a solution that increases efficiency by reducing the relieving pressure. In order to compensate for the resulting control performance degradation, the paper takes a valve controlled swing motor system under low pressure as the research aim. Considering the uncertainty of external disturbance and flow parameters, the mathematical model of the system is established, using an extended state observer to estimate the external disturbances in real time to increase the compensation value and state feedback for the robust backstepping sliding mode controller. Finally, the simulation results confirm the control algorithm proposed is effective for keeping control performance in decreasing pressure conditions.

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Review of the Energy Saving Hydraulic System Based on Common Pressure Rail

Cited by 57 publications

References 36 publications

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

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

Fuzzy Sliding Mode Control for Active Suspension System with Proportional Differential Sliding Mode Observer

Robust Backstepping Sliding Mode Controller Investigation for a Port Plate Position Servo System Based on an Extended States Observer

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