A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
INTERNAL COMBUSTION ENGINE CONTROL SYSTEM OF CONSTRUCTION MACHINE
To provide an internal combustion engine control system of a construction machine which can suppress a fall of a rotation number of an internal combustion engine when transited to high-load work from low-load work even if performing continuous work for alternately repeating the high-load work and the low-load work, in a construction machine which is mounted with the internal combustion engine having a supercharger.SOLUTION: Control means sets target supercharge pressure on the basis of acquired requirement torque, or a requirement torque relation amount which is calculated on the basis of the acquired requirement torque, calculates the requirement torque relation amount so as to be large as the requirement torque becomes large, sets target supercharge pressure so as to be high as the requirement torque or the requirement torque relation amount becomes large, and when the requirement torque or the requirement torque relation amount is changed to a reduction side, performs mild reduction processing for making a change of the target supercharge pressure to the reduction side mild when lowering the target supercharge pressure to reduced target supercharge pressure corresponding to the reduced requirement torque, or the requirement torque relation amount from current target supercharge torque.SELECTED DRAWING: Figure 5
【課題】過給機を有する内燃機関が搭載された建設機械にて、高負荷作業と低負荷作業を交互に繰り返す連続作業を行った場合であっても、低負荷作業から高負荷作業へと遷移した際の内燃機関の回転数の落ち込みを抑制することができる、建設機械の内燃機関制御システムを提供する。【解決手段】制御手段は、取得した要求トルクまたは取得した要求トルクに基づいて算出した要求トルク関連量に基づいて目標過給圧を設定し、要求トルクが大きくなるほど大きくなるように要求トルク関連量を算出し、要求トルクまたは要求トルク関連量が大きくなるほど高くなるように目標過給圧を設定し、要求トルクまたは要求トルク関連量が減量側に変化した場合には、現在の目標過給圧から、減量後の要求トルクまたは要求トルク関連量に対応する減量後目標過給圧へと前記目標過給圧を減量させる際の、目標過給圧の減量側への変化が緩やかになるように緩減量処理を実行する。【選択図】図５
INTERNAL COMBUSTION ENGINE CONTROL SYSTEM OF CONSTRUCTION MACHINE
To provide an internal combustion engine control system of a construction machine which can suppress a fall of a rotation number of an internal combustion engine when transited to high-load work from low-load work even if performing continuous work for alternately repeating the high-load work and the low-load work, in a construction machine which is mounted with the internal combustion engine having a supercharger.SOLUTION: Control means sets target supercharge pressure on the basis of acquired requirement torque, or a requirement torque relation amount which is calculated on the basis of the acquired requirement torque, calculates the requirement torque relation amount so as to be large as the requirement torque becomes large, sets target supercharge pressure so as to be high as the requirement torque or the requirement torque relation amount becomes large, and when the requirement torque or the requirement torque relation amount is changed to a reduction side, performs mild reduction processing for making a change of the target supercharge pressure to the reduction side mild when lowering the target supercharge pressure to reduced target supercharge pressure corresponding to the reduced requirement torque, or the requirement torque relation amount from current target supercharge torque.SELECTED DRAWING: Figure 5
【課題】過給機を有する内燃機関が搭載された建設機械にて、高負荷作業と低負荷作業を交互に繰り返す連続作業を行った場合であっても、低負荷作業から高負荷作業へと遷移した際の内燃機関の回転数の落ち込みを抑制することができる、建設機械の内燃機関制御システムを提供する。【解決手段】制御手段は、取得した要求トルクまたは取得した要求トルクに基づいて算出した要求トルク関連量に基づいて目標過給圧を設定し、要求トルクが大きくなるほど大きくなるように要求トルク関連量を算出し、要求トルクまたは要求トルク関連量が大きくなるほど高くなるように目標過給圧を設定し、要求トルクまたは要求トルク関連量が減量側に変化した場合には、現在の目標過給圧から、減量後の要求トルクまたは要求トルク関連量に対応する減量後目標過給圧へと前記目標過給圧を減量させる際の、目標過給圧の減量側への変化が緩やかになるように緩減量処理を実行する。【選択図】図５
INTERNAL COMBUSTION ENGINE CONTROL SYSTEM OF CONSTRUCTION MACHINE
建設機械の内燃機関制御システム
AOKI HIDEKI (author)
2020-01-16
Patent
Electronic Resource
Japanese
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