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

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Մատենագիտական մանրամասներ
Հրատարակված է:	Hidraulica no. 2 (2025), p. 33-40
Հիմնական հեղինակ:	Chiriță, Alexandru-Polifron
Այլ հեղինակներ:	Rădoi, Radu-Iulian, Tudor-Rotilă, Bogdan-Alexandru, Șefu, Ștefan-Mihai
Հրապարակվել է:	Hidraulica
Խորագրեր:	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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Նկարագրություն
Համառոտագրություն:	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
Աղբյուր:	Advanced Technologies & Aerospace Database