CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

• Main Authors: SASAKI KEISUKE, NAGAI MASAKATSU, KOYAMA KAZUYA
• Format: Patent
• Language: English; Japanese
• Published: 19.04.2018
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

PROBLEM TO BE SOLVED: To suppress the erroneous determination of the generation of a knock even if noise is superimposed on a high-frequency component of an output signal of an in-cylinder pressure sensor resulting from the adhesion or the like of a deposit to a tip of the sensor, in a control device of an internal combustion engine.SOLUTION: A control device determines the presence or absence of the generation of a knock on the basis of a knock determination signal being an output signal of an in-cylinder pressure sensor after passing through a BPF part which extracts the output signal of the in-cylinder pressure sensor in a passage band region including a knock frequency band area in which a knock component can be superimposed on the output signal of the in-cylinder pressure sensor, controls an operation state of an internal combustion engine on the basis of a determination result of the knock, and narrows the passage band area in a form that a block frequency at a high-frequency side becomes low when the superimposition of the noise component on the knock determination signal of a band area of the high-frequency side in the passage band area is detected.SELECTED DRAWING: Figure 6 【課題】内燃機関の制御装置に関し、センサ先端へのデポジットの付着等に起因して筒内圧センサの出力信号の高周波成分にノイズが重畳することがあっても、ノックの発生の誤判定を抑制できるようにすることを目的とする。【解決手段】制御装置は、筒内圧センサの出力信号に対してノック成分が重畳し得るノック周波数帯域を含む通過帯域にて筒内圧センサの出力信号を抽出するＢＰＦ部を通過した後の筒内圧センサの出力信号であるノック判定用信号に基づいてノックの発生の有無を判定し、ノックの判定結果に基づいて内燃機関の運転状態を制御し、かつ、通過帯域内の高周波側の帯域のノック判定用信号へのノイズ成分の重畳を検出した場合には、高周波側の遮断周波数が低くなる態様で通過帯域を狭めるように構成されている。【選択図】図６