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Optimizing Energy Efficiency in Closed-Circuit Hydrostatic Transmissions: Advancing Charge Pump System Control

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Udgivet i:Hidraulica no. 2 (2025), p. 33-40
Hovedforfatter: Chiriță, Alexandru-Polifron
Andre forfattere: Rădoi, Radu-Iulian, Tudor-Rotilă, Bogdan-Alexandru, Șefu, Ștefan-Mihai
Udgivet:
Hidraulica
Fag:
Cavitation
Misalignment
Thermal cycling
Tribology
Pumps
Energy losses
Energy efficiency
Optimization
Adaptive control
Charge pumps
Energy conservation
Energy consumption
Fuzzy logic
Pressure
Adaptive algorithms
Energy loss
Control algorithms
Cooling
Motor units
Heat exchangers
Servocontrol
Proportional control
Sustainability
Heat generation
Cost control
Hydraulics
Economic
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Resumen:While closed-circuit hydrostatic transmissions (HTs) achieve remarkable efficiencies (≤98%) in their main pump-motor units, auxiliary charge pump systems remain a significant source of avoidable energy loss. This review synthesizes current research to demonstrate that conventional fixed-operation charge pumps-operating continuously at ~25 bar pressure and 10-20% of main pump flow-waste substantial energy due to misalignment with actual system demands. Charge pumps perform critical functions: compensating for internal leakage, providing filtration/cooling, supplying servo-control pressure, preventing cavitation, and ensuring lubrication. However, their static operation causes continuous throttling losses and heat generation. Recent advances in variable-displacement pumps and adaptive control strategies (e.g., pressure compensation, servo-proportional control) enable dynamic adjustment of charge pressure and flow, unlocking 20-45% energy savings without compromising functionality. We identify charge system optimization as the next frontier for HT sustainability and prioritize research directions: robust adaptive algorithms, digital hydraulic integration, and standardized validation frameworks.
ISSN:1453-7303
2343-7707
Fuente:Advanced Technologies & Aerospace Database