WORK MACHINE

To provide a work machine that can prevent a decrease in work speed and reduce fuel consumption.SOLUTION: The proportion of operation is calculated by an operation state of a hydraulic shovel 100, a target fuel consumption reduction coefficient is calculated by an operation amount of an operation le...

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Bibliographische Detailangaben
Hauptverfasser: KANEDA TOMOAKI, ODAKA KATSUAKI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a work machine that can prevent a decrease in work speed and reduce fuel consumption.SOLUTION: The proportion of operation is calculated by an operation state of a hydraulic shovel 100, a target fuel consumption reduction coefficient is calculated by an operation amount of an operation lever device 50 based on the proportion of operation, a pump output reduction rate is calculated by an operation state based on a target fuel consumption reduction rate being input in advance and the target fuel consumption reduction coefficient, one of a plurality of pump output reduction rates is selectively set depending on operation states, and a pump torque command value used for controlling a hydraulic pump 41 is corrected based on the pump output reduction rate being set.SELECTED DRAWING: Figure 4 【課題】作業速度の低下を抑制しつつ燃料消費量を抑制することができる作業機械を提供すること。【解決手段】油圧ショベル100の動作状態ごとの動作割合を算出し、動作割合に基づいて操作レバー装置50の操作量ごとに目標燃費低減係数を算出し、予め入力された目標燃費低減率と目標燃費低減係数とに基づいて、動作状態ごとにポンプ出力低減率を算出し、動作状態に応じて複数のポンプ出力低減率のうちの1つを選択的に設定し、設定したポンプ出力低減率に基づいて油圧ポンプ41の制御に用いられるポンプトルク指令値を補正する。【選択図】 図4