WebA swing drive system ( 11 ) for an excavator is provided which utilizes a prime mover ( 20 ) mechanically connected to a first hydraulic pump/motor ( 30 ) and a second hydraulic pump/motor ( 32 ) mechanically connected to a swing mechanism ( 70 ). The system includes a hydraulic circuit ( 31 ) connecting a hydraulic fluid reservoir ( 42 ), a hydraulic …
Get a Quote
WebMay 1, 2012 · For control design, dynamic models of typical swing motions of the hybrid excavator are derived using a system identification technique. Because the system states of theobtained models are not directly measurable, a sliding mode observer is designed to estimate the system states.
Get a Quote
WebMay 25, 2015 · The traditional hydraulic excavator has some questions, so as energy waste, Environmental pollution. In this paper, The control strategy of Oil-electric hybrid excavator presented swing mechanism brake energy recovery system is investigated. Permanent magnet synchronous motor feedback system moving process was analyzed. …
Get a Quote
WebMay 25, 2015 · The traditional hydraulic excavator has some questions, so as energy waste, Environmental pollution. In this paper, The control strategy of Oil-electric hybrid excavator presented swing mechanism brake energy recovery system is investigated. Permanent magnet synchronous motor feedback system moving process was analyzed. …
Get a Quote
WebIn order to reduce the energy consumption and emissions of large hydraulic excavators which the boom is driven by two hydraulic cylinders, an integrated drive and potential energy recuperation principle is proposed. In terms of 8 hours of work per day, a single excavator can save fuel up to 47 L per day and reduce carbon dioxide emissions
Get a Quote
WebAug 8, 2017 · A distributed fault-tolerant strategy for the controller area network based electric swing system of hybrid excavators is proposed to achieve good performance under communication errors based on the adaptive compensation of the delays and packet dropouts. The adverse impacts of communication errors are effectively reduced by a …
Get a Quote
WebA hybrid swing drive system (1) of a hydraulic construction machine includes a variable displacement hydraulic swing pump (3) operable by a prime mover(2); a hydraulic swing motor (16) for performing a swing function of the machine; an accumulator (10); a controller (244); a swing control valve assembly (15) disposed in a first hydraulic path extending …
Get a Quote
WebMar 20, 2018 · 1. An excavator comprising: a prime mover; an excavator swing mechanism; a first hydraulic pump/motor mechanically connected to the prime mover; a second hydraulic pump/motor mechanically connected to the excavator swing mechanism; a hydraulic fluid reservoir; a hydraulic accumulator; a hydraulic circuit connecting the …
Get a Quote
WebMar 13, 2015 · First, the power flow and the dynamics of the powertrain of compound hybrid power excavators are analysed. It is concluded that the control strategy for compound hybrid power excavators has to guarantee the charge and discharge priority for operation of the swing and the boom lowering.
Get a Quote
WebApplying the electric hybrid technique on the off-road vehicle is one popular method to reduce the fuel consumption. However, the high cost, low energy conversion efficiency and disposal of used batteries are still the main problems. This paper is focusing on one alternative choice which is hydraulic hybrid off-road vehicles. Among the most typical off …
Get a Quote
WebSep 29, 2015 · Among these architectures, hydraulic hybrids with secondary-controlled drives have proven to be a reliable, implementable, and highly efficient alternative with the potential for up to 50% engine downsizing when applied to excavator truck-loading cycles.
Get a QuoteWebA hybrid swing drive system (1) of a hydraulic construction machine includes a variable displacement hydraulic swing pump (3) operable by a prime mover(2); a hydraulic swing motor (16) for performing a swing function of the machine; an accumulator (10); a controller (244); a swing control valve assembly (15) disposed in a first hydraulic path extending …
Get a Quote
WebDistributed fault-tolerant strategy for electric swing system of hybrid excavators under communication errors * Da-hui GAO. 1,2, Qing-feng WANG. 1 feedback signal and the control command are compensated each control in period in the central controller and the swing motor The results show that the proposed fault-tolerant strategy can
Get a Quote
WebAug 8, 2017 · A distributed fault-tolerant strategy for the controller area network based electric swing system of hybrid excavators is proposed to achieve good performance under communication errors based on the adaptive compensation of …
Get a Quote
WebDistributed fault-tolerant strategy for electric swing system of hybrid excavators under communication errors * Da-hui GAO. 1,2, Qing-feng WANG. 1 feedback signal and the control command are compensated each control in period in the central controller and the swing motor The results show that the proposed fault-tolerant strategy can
Get a QuoteWebSep 29, 2015 · Recent developments on adaptive robust control (ARC) algorithms for displacement-controlled actuation systems by the authors' group have opened the door for the application of more advanced control strategies for hydraulic hybrid systems. This paper presents the first time synthesis of an ARC strategy for the motion control of the …
Get a Quote
WebApplying the electric hybrid technique on the off-road vehicle is one popular method to reduce the fuel consumption. However, the high cost, low energy conversion efficiency and disposal of used batteries are still the main problems. This paper is focusing on one alternative choice which is hydraulic hybrid off-road vehicles. Among the most typical off …
Get a Quote
WebThe present invention relates to a control system for a hybrid excavator including an engine, a hydraulic pump driven by the engine to drive a hydraulic actuator by hydraulic fluid, a generator driven by the engine to generate electric energy, and an energy storage device charging the electric energy generated by the generator and supplying the electric …
Get a Quote
WebJul 27, 2018 · A rule-based control strategy which controls the machine according to the real-time operating parameters and the pre-set rule is used widely. 20, 21 Choi et al. 20 used a rule-based control algorithm to improve fuel economy of a compound hybrid excavator in a typical digging process.
Get a Quote
WebApr 13, 2019 · Regeneration of potential energy is an effective solution to save energy in hydraulic excavators. This paper proposed a new hydraulic circuit for the swing system of a hydraulic excavator. Hydraulic accumulator was installed in system to store the regenerated energy. Then, the fuzzy rule was used to choose energy regeneration time. …
Get a Quote