CONSTRUCTION MACHINE ENGINE CONTROL DEVICE

• Main Authors: KINOSHITA ATSUSHI, IWABE KAZUYA, FUJIMOTO HIROAKI, MURAOKA HIDEYASU, OKASHIRO TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 13.07.2017
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

PROBLEM TO BE SOLVED: To provide a fuel efficient and user-friendly construction machine engine control device which obtains a fuel injection amount necessary to achieve a target rotation speed with improved accuracy and curbs a deviation of an actual rotation speed from the target rotation speed.SOLUTION: A construction machine engine control device which causes an engine to drive a hydraulic pump of a construction machine comprises: storage means which stores an injection amount determination map showing a correlation among required torque, an actual rotation speed and an appropriate fuel injection amount of the engine; injection amount determination means which determines a fuel injection amount of the engine from the required torque and the actual rotation speed on the basis of the injection amount determination map; rotation speed deviation calculation means which calculates a rotation speed deviation by deducting the actual rotation speed from a target rotation speed; and injection amount correction means which corrects the fuel injection amount determined by the fuel injection amount determination means in a manner that brings the rotation speed deviation close to zero.SELECTED DRAWING: Figure 4 【課題】目標回転数を実現するために必要な燃料噴射量をより正確に求め、目標回転数に対する実回転数の変動を抑制し、燃費・操作性に優れた建設機械のエンジン制御装置を提供すること。【解決手段】建設機械の油圧ポンプをエンジンにより駆動させる、建設機械のエンジン制御装置は、エンジンの要求トルクと、実回転数と、適正燃料噴射量との相関関係を示す噴射量決定用マップを記憶する記憶手段と、噴射量決定用マップに基づいて、要求トルクおよび実回転数から、エンジンの燃料噴射量を決定する噴射量決定手段と、目標回転数から実回転数を減算した回転数偏差を算出する回転数偏差算出手段と、回転数偏差が０に近付くように、噴射量決定手段によって決定される燃料噴射量を補正する噴射量補正手段と、を有する。【選択図】図４