INJECTION CONTROLLER

• Main Author: NISHIMURA TOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 14.06.2018
• Subjects: ACTUATING-FLOATS; BASIC ELECTRIC ELEMENTS; BLASTING; COCKS; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; DEVICES FOR VENTING OR AERATING; ELECTRICITY; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDUCTANCES; LIGHTING; MAGNETS; MECHANICAL ENGINEERING; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TAPS; THERMAL INSULATION IN GENERAL; TRANSFORMERS; VALVES; WEAPONS

PROBLEM TO BE SOLVED: To provide an injection controller capable of opening/closing an injection valve with high reliability, even in a condition that when current is applied to a driving coil, application voltage is low.SOLUTION: After current of a coil 3 reaches a peak current threshold Ip, a control circuit 5 is configured to perform constant current control within a predetermined current range lower than the peak current threshold Ip by turning on/off application of power supply voltage VB to the coil 3. The control circuit 5 is configured to apply boost voltage Vboost higher than the power supply voltage VB to the coil 3, on condition that the current becoming below the predetermined current range in the constant current control is detected.SELECTED DRAWING: Figure 1 【課題】駆動用のコイルに電流を印加するときに印加電圧が低電圧となる条件下においても、より信頼性良く噴射弁を開弁・閉弁できるようにした噴射制御装置を提供する。【解決手段】コイル３の電流がピーク電流閾値Ｉｐに達した後、制御回路５は、コイル３に電源電圧ＶＢを通電オン・オフすることによりピーク電流閾値Ｉｐよりも低い所定電流範囲に定電流制御する。制御回路５は、定電流制御するときに所定電流範囲を下回ったことが検知されたことを条件として電源電圧ＶＢより高い昇圧電圧Ｖboostをコイル３に印加する。【選択図】図１