Optimization of directional control valves through downstream compensation approach

Mesturini, Davide; SpA, via Adige Walvoil; Dolcin, Cesare; Busani, Ulderico; Marani, Pietro; Bonavolonta, A; Frosina, Emma

doi:10.25368/2020.77

Cited by 3 publications

(8 citation statements)

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“…where refers to the recovered energy in the accumulator¸ is the energy delivered by the main pump during the lowering operation and refers to the potential energy of the load in its starting position. The energy results of the first two configurations were already shown in the papers [7,8] while in this work the focus is on the energy recovered through the last presented layout. Fig.…”

Section: Experimental Tests and Numerical Model Resultsmentioning

confidence: 84%

“…1 and Fig. 2), presented in recent studies [7,8] were a fundamental starting point to develop the last layout displayed in Fig. 3 in local compensation and in Fig.…”

Section: System Architecturesmentioning

confidence: 94%

“…The idea of a 3 ways compensator comes out from works already presented by the authors in recent studies [6]; where the system was limited to realize internal regenerations, making impossible the energy storage from the overrunning loads and local compensations. For this reason, a downstream compensation system was realized through the introduction of a new 3 ways compensator architecture [7]. The scheme, illustrated in Fig.…”

Section: System Architecturesmentioning

confidence: 99%

“…In fact, an important energy recovery can be obtained through the control of overrunning loads and the compensation in simultaneous movements. In this paper, a new solution of Directional Control Valve, based on the Downstream Compensation concept, is presented [6][7][8]. Thanks to its particular configuration, this innovative compensator is able to control the return flow of the circuit, deflecting it to an accumulator for the recovery.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Downstream Compensator: Innovative Systems, Modeling Analysis and Energy Optimization

Bonavolonta

Mesturini²,

Dolcin³

et al. 2020

E3S Web Conf.

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The Energy optimization is becoming fundamental in the Fluid Power world. University and industries are working hard to promote innovative and efficient ideas to optimize components that are the main cause of energy dissipation of ICE and recently Electric Off-Road vehicles. A new hydraulic layout based on the concept of “Downstream compensation” is introduced and then validated using real test data. Three architectures of this innovative Directional Control Valve are presented in this paper. The first idea of layout includes a compensator controlled by two pressure signals taken before and after the main spool of the hydraulic circuit. Thanks to its controlled stroke, this compensator diverts to a highpressure accumulator part of flow that otherwise would be delivered to the tank. Moreover, two different layouts able to satisfy the Flow Sharing characteristic were developed. In any configuration, the compensator, thanks to its downstream position, allows to control the return flow, realizing a remarkable energy recovery from the overrunning loads and the simultaneous use of multiple actuators at different pressure levels. For all the analyzed hydraulic circuit, lumped parameter models were realized, using a commercial software. These models, validated with experimental tests, have allowed to calculate the energy recovery achieved by the system. Moreover, an optimization of the most important system’s parameters and components were realized to improve the system efficiency. In every tested configuration, this compensator ensures great advantages for both the energy recovery and the economic point of view. Finally, an outlook is drawn of the reuse of recovered flow through the application of an electrohydraulic motor.

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Section: Experimental Tests and Numerical Model Resultsmentioning

confidence: 84%

“…1 and Fig. 2), presented in recent studies [7,8] were a fundamental starting point to develop the last layout displayed in Fig. 3 in local compensation and in Fig.…”

Section: System Architecturesmentioning

confidence: 94%

Section: System Architecturesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Downstream Compensator: Innovative Systems, Modeling Analysis and Energy Optimization

Bonavolonta

Mesturini²,

Dolcin³

et al. 2020

E3S Web Conf.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In Figure 2 the 2 pilot pressure signals compensator, already described by the authors in [11], is shown. This compensator is controlled by a couple of pilot signals acting on identical areas A PIL and taken before (p OUT ) and after (p COMP ) the main spool's meter out notch.…”

Section: The Idea Of Energy Recovery From a Downstream Compensationmentioning

confidence: 99%

Experimental and Modelling Analysis of a Downstream Compensation System: Energy Optimization of the Directional Control Valves

Bonavolonta

Frosina

Marani³

et al. 2023

TJFP

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Through a study on the Fluid Power innovations in the last years emerged that still few solutions have been successfully implemented for the optimization of the hydraulic circuits. The recent machine electrification offers a potential for investment in energy-saving hydraulic systems to ensure greater performance and higher battery autonomy. From different studies emerged that in the specific field of ICE Off-road Vehicles, only about 10–15% of the available power at fuel level is actually transformed into useful energy for the actuators. Particularly the losses in the Directional Control Valves represent about 35–40% of the hydraulic energy available at the pump level. The traditional Directional Control Valves design solutions, in fact, neglects important opportunities for reducing losses and improving internal regeneration. Especially, energy recovery is rarely applied and in any case by means of important superstructures which considerably increase the costs of the system. This paper presents a new hydraulic architecture: an original Directional Control Valve layout based on a Downstream Compensation approach. In particular, a Flow Sharing system is implemented in this new architecture with the goal to minimize the wasted energy. In fact, this system realizes an important energy recovery from both the inertial loads and the simultaneous use of multiple actuators at different pressure level. The circuit enables recovered energy to be stored in a high-pressure accumulator. The paper presents the simulation results and the energy saving estimation realized through a lumped parameter environment “Amesim Simcenter”. Additionally, the results of experimental activities show the innovative system performance, benefits and physical applicability. This idea is based on concrete objectives and pays particular attention to cost sustainability, industrial manufacturability and system scalability.

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Viable Energy Recovery Strategies Through Advanced Directional Control Valve

Ganassi¹,

Mesturini²,

Dolcin³

et al. 2023

TJFP

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The demand for more efficient machines is pushing hydraulic manufacturers to develop a new generation of systems capable of energy saving and recovering. An advanced flow sharing directional control valve with downstream compensation reduces meter-out pressure losses and recovers energy both in combined movements and with overrunning loads. Tests carried out on a prototype on a test bench confirm the proper functioning of the concept and allow tuning its lumped parameters numerical model. A control strategy based on keeping the optimal compensator position allows computing the maximum theoretical recovery. The simulation of a mini-excavator digging cycle shows the energy saving and recovery compared to a standard flow sharing system.

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Optimization of directional control valves through downstream compensation approach

Cited by 3 publications

References 0 publications

Downstream Compensator: Innovative Systems, Modeling Analysis and Energy Optimization

Downstream Compensator: Innovative Systems, Modeling Analysis and Energy Optimization

Experimental and Modelling Analysis of a Downstream Compensation System: Energy Optimization of the Directional Control Valves

Viable Energy Recovery Strategies Through Advanced Directional Control Valve

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