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Causes and countermeasures for various kinds of hydraulic system failures in construction machinery generated by biodegradable hydraulic oil (bio-oil) are discussed. Previous component analytical methods can prevent all kinds of failures except hydraulic system malfunction, which requires a holistic approach for analysis. Using the Systems Modeling Language (SysML), the cause of malfunctions can be understood, and the most effective countermeasure can be obtained. Integration of a component analysis method and a holistic analysis method for system development is proposed. キーワード:油圧システム、建設機械、生分解性作動油、作動不良、不具合対策、システムモデル、SysML

A new process to develop a hydraulic system adapted to biodegradable hydraulic oil for construction machinery