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In a mini excavator, for example, the powertrain consists of a diesel engine which is hooked up to a set of hydraulic pumps. Together, they generate the critical gallons per minute (gpm) of hydraulic fluid that energize the undercarriage, cab swing, bucket curl, attachment operation and everything in between.
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In the series-parallel hybrid powertrain configura-tion of an excavator, the engine drives the generator directly. The hydraulic pumps are driven by generator in series, and the swing electric motor is driven by gen-erator and battery or supercapacitor in parallel.31 Although the fuel consumption of series-parallel hybrid
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Electric power train system is one of the energy saving technologies of excavator [3], [4], [5]. However, because of cost and reliability of batteries, the development of electric excavators is restricted.
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This paper studies on parameters matching and control strategy of power train systems for hybrid hydraulic excavators (HHEs). Load profiles of a 20-t excavator are measured and analyzed.
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To reduce the energy consumption and emission, an innovative powertrain and the energy management strategy are proposed for hydraulic excavator in this paper. The novel powertrain consists of the engine, motor/generator, planetary gear, gearbox, and variable hydraulic pump. The energy regeneration system is also applied on the system to regenerate the potential energy and charge the battery.
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The structure of the HPTS in the excavator is given as Fig. 3.In this system, an engine and an electric machine are adopted to co-drive pumps. The system uses the electric machine of high efficiency to balance the load fluctuation by working in motor mode and generator mode, to stabilize the working points of the engine in the high efficiency area, and then to improve the overall efficiency of.
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Currently, there are several energy saving methods for HE and they mainly concentrate on the following three aspects: (1) improving the performance of working components; (2) reforming the hydraulic system; (3) ameliorating the situation of power matching between the diesel engine, the hydraulic system and the load.
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This paper presents an innovative powertrain design and an energy regeneration system for hybrid hydraulic excavators to reduce energy consumption and emissions. The proposed system is designed to maximize engine efficiency and make full use of the energy gained from boom and arm retraction. The powertrain features an innovative design that incorporates a continuously variable transmission.
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This paper systematically analyzed the performance of the powertrain hybridization of hydraulic excavator and compared the main performance among the parallel, the series and the conventional configurations based on a 5-ton excavator. The data of the conventional excavator used for analysis were gathered from the real working process, while.
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This article reviews the state-of-art for the hybrid wheel loader and excavator, which focuses on powertrain configuration, energy storage devices, and energy management strategies. The basis of classification and characteristic of each powertrain configuration are described. Advantages and disadvantages of batteries, supercapacitors, hydraulic.
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The powertrain solutions that integrates the engine, hydraulic parts, controller, to provide customers with system solutions. Dual-pump design and Integral valve design, make the excavator structure compact, performance excellence. LSC hydraulic system, distribute according to demand, manoeuvrability better handling. Nr.
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An innovative powertrain is proposed for hybrid hydraulic excavator. โข A gear box is integrated to adjust torque and speed of power source. โข An online energy management strategy is proposed to improve the engine's efficiency. โข Proposed system offers improvements in energy saving and regeneration up to 5.86% and 48.2%. โข
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To enhance the energy saving efficiency, this paper proposes an innovative electric hybrid hydraulic excavator, as shown in Fig. 1. The engine, electric motor/generator, invertor, battery, hydraulic pump, and planetary gear are installed in the powertrain of the excavator. The hydraulic motor and generator are installed in the return line of.
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