FUEL INJECTION CONTROL DEVICE OF ENGINE

• Main Authors: HORIUCHI HIROAKI, OKUMURA TAKUJIN, FUJIWARA RYOJI
• Format: Patent
• Language: English; Japanese
• Published: 01.06.2017
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

PROBLEM TO BE SOLVED: To properly control a fuel injection valve on the basis of a lapse time after fuel injection in place of a crank angle, related to the fuel injection on and after a second time.SOLUTION: A PCM 10 as a fuel injection control device of an engine which is employed to the engine 1 having a solenoid-type fuel injection valve 67 controls the fuel injection valve 67 so as to perform two-time or more of fuel injection for one-time combustion in a cylinder of the engine 1, and controls a valve-opening period of the fuel injection valve 67 according to an injection interval of the fuel injection. Concretely, when the injection interval is shorter than a prescribed time, the PCM 10 performs control for valve-opening the fuel injection valve 67 on the basis of a crank angle related to first-time fuel injection, and performs control for valve-opening the fuel injection valve 67 on the basis of a lapse time after the first-time fuel injection related to the fuel injection on and after a second time.SELECTED DRAWING: Figure 9 【課題】２回目以降の燃料噴射について、クランク角の代わりに、燃料噴射後からの経過時間に基づき、燃料噴射弁を適切に制御する。【解決手段】ソレノイド式の燃料噴射弁６７を備えたエンジン１に適用される、エンジンの燃料噴射制御装置としてのＰＣＭ１０は、エンジン１の気筒での１回の燃焼のために２回以上の燃料噴射を行うように燃料噴射弁６７を制御し、燃料噴射の噴射間隔に応じて燃料噴射弁６７の開弁期間を制御する。具体的には、ＰＣＭ１０は、ＰＣＭ１０は、噴射間隔が所定時間未満である場合に、初回の燃料噴射については、クランク角に基づき燃料噴射弁６７を開弁させる制御を行い、２回目以降の燃料噴射については、初回の燃料噴射後からの経過時間に基づき燃料噴射弁６７を開弁させる制御を行う。【選択図】図９