908c excavator

  • A Novel Approach for the Energy Recovery and Position

    The heavy earth moving machineries (HEMM) like hydraulic excavator play a major role in construction and mining industries. In this context, the energy saving strategies in hydraulic excavator needs to be addressed considering its vital importance. Since the hydraulic excavators are subjected to hea …

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  • Control Strategy for Hybrid Excavator Swing System …

    Jan 01, 2013 · The swing torque of the upper structure is to guarantee the bucket is compressed closely against the side wall. In conventional hydraulic excavators, the swing torque is controlled by spool displacement of the main valve, while in hybrid excavator, the swing torque need still be controlled by pilot valve on such occasions.

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  • Energy Regeneration and Reuse of Excavator Swing System

    1 day ago · In order to solve the environmental pollution and the depletion of petroleum energy, construction machine with high efficiency needs to be urgently developed. In this paper we propose a new energy regenerative swing system with a hydraulic accumulator, variable hydraulic motor and proportional flow control valve for realizing highly energy efficient construction machine. Furthermore, …

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  • Research Article Energy-Saving Analysis of Hydraulic

    Energy-Saving Analysis of Hydraulic Hybrid Excavator Based on Common Pressure Rail and gravitational energy. e swing and boom are the two biggest potential; hence, the maximum recovery energy can hydraulic, and control systems is needed to simulate the

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  • Volvo's EC300E Hybrid excavator ain't got that swing

    Jan 27, 2020 · Instead of capturing an excavator's swing energy to provide an electric assist to the engine, the hydraulic hybrid assist system on Volvo Construction Equipment's upcoming …

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  • CN103851040B - Energy regeneration system of excavator and

    But excavator is in real work, in order to improve answering for the convenience of operating efficiency and operation, swing arm and dipper Conjunction action is the most frequent.When swing arm declines and dipper excavates action simultaneously, the big chamber of boom cylinder has hydraulic oil more than needed to be back to Fuel tank, causes the hydraulic oil in the waste of energy, the

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  • Energy-Saving Hydraulics

    Jan 16, 2009 · Hydraulic hybrid vehicle stores braking energy in the accumulator, then retrieves it when the truck pulls forward. Hybrid vehicles hold great promise for the waste industry because collection vehicles have many cycles of braking and acceleration along a given route.

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  • Energy Regeneration and Reuse of Excavator Swing System

    1 day ago · In order to solve the environmental pollution and the depletion of petroleum energy, construction machine with high efficiency needs to be urgently developed. In this paper we propose a new energy regenerative swing system with a hydraulic accumulator, variable hydraulic motor and proportional flow control valve for realizing highly energy efficient construction machine. Furthermore, …

    Learn More
  • Research Article Energy-Saving Analysis of Hydraulic

    Energy-Saving Analysis of Hydraulic Hybrid Excavator Based on Common Pressure Rail and gravitational energy. e swing and boom are the two biggest potential; hence, the maximum recovery energy can hydraulic, and control systems is needed to simulate the

    Learn More
  • ENERGY SAVING MODEL DESIGN FOR SWING …

    machinery, especially for hydraulic excavator, has been increased in response for growing concerns on the clean environment and saving energy [1]. Applying the electric hybrid technique on the off-road vehicle is one popular method to reduce the fuel consumption [2]. Consequently, many researches on design and control of hybrid systems

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  • Application of Hydraulic Transformer on Energy Saving for

    Facing the energy crisis and environmental problems, saving energy of construction machinery, especially in the hydraulic excavator is very important. Regeneration of the potential energy is an effective solution to save energy. However, the conventional hybrid excavator can't regenerate the potential energy. This paper proposes a new structure of boom system of hydraulic excavator as well

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  • EC250E Hybrid | Excavators | Overview | Volvo Construction

    The EC250E Hybrid crawler excavator utilizes pioneering Volvo hydraulic hybrid technology to improve fuel efficiency by up to 17%. Using the boom down motion to charge the accumulator, the excavator uses this stored energy to drive the assist motor which powers the engine system. Save big on fuel while benefitting from the power and performance

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  • Energy-Saving Analysis of Hydraulic Hybrid Excavator …

    Moreover, it does not cancel the multi-valves as flow control component for the cylinder, so the metering loss remains. One alternative for hybrid excavators is hydraulic hybrid excavator based on common pressure rail (HHEC) adopting hydraulic accumulators as the storing component [22–24]. It not only eliminates the theoretical metering loss but can also recover energy.

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  • Energy-Saving Analysis of Hydraulic Hybrid Excavator Based

    that an electric hybrid excavator consists of hydraulic and electric actuators, and the energy needs to be converted amongmechanical,hydraulic,andelectricenergywhichwill

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  • A Novel Energy Recovery System for Parallel Hybrid

    Hydraulic excavator energy saving is important to relieve source shortage and protect environment. This paper mainly discusses the energy saving for the hybrid hydraulic excavator. By analyzing the excess energy of three hydraulic cylinders in the conventional hydraulic excavator, a new boom potential energy recovery system is proposed. The mathematical models of the main components including

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  • Volvo CE's different approach to hybrid tech - Equipment

    Aug 24, 2020 · For Volvo Construction Equipment's first hydraulic hybrid excavator, the EC300E, the company took a different approach to capturing energy for the system. Unlike other hybrid models that capture the swing energy of an excavator's superstructure to electrically assist the engine, Volvo's novel hydraulic hybrid takes free energy generated

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  • Caterpillar Hybrid Excavator Technology Sells Itself to

    May 03, 2013 · In a 336E H orientation meeting the day before, Caterpillar's Ken Gray, global product manager for large hydraulic excavators, said that the company decided in 2009 to keep an open mind as it began concurrent development of two hybrid concepts, both aimed at recovering the energy that conventional excavators waste when their swinging upper

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  • A look under the hood of Caterpillar's new 336E H

    Apr 05, 2013 · Hydraulic hybrid swing system. This is a pair of big nitrogen gas accumulators that absorb the energy that goes into stopping the swing rotations and then reuses that energy it …

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  • Adaptive Robust Motion Control of an Excavator Hydraulic

    Sep 29, 2015 · Adaptive Robust Motion Control of an Excavator Hydraulic Hybrid Swing Drive Liming53 Over the last decade, a number of hybrid architectures have been proposed with the main goal of minimizing energy consumption of off-highway vehicles.

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  • Design and Control of Hydraulic Hybrid System for Excavators

    Jan 11, 2016 · This paper is to study on a novel recovery and release hydraulic hybrid system for excavators (HHE). The HHE uses hydraulic accumulators to recover the potential energy of the boom, the kinetic energy of the swing motor and the overflow hydraulic energy of the excavator's main relief.

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