CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

• Main Authors: HISADA MASAYUKI, NOGUCHI MASAHIRO, YOSHIZAKI SATOSHI
• Format: Patent
• Language: English; Japanese
• Published: 01.07.2021
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

To suppress occurrence of an alternate backflow phenomenon with regard to a control device for an internal combustion engine having two superchargers.SOLUTION: An internal combustion engine 20 to which a control device 10 is applied includes a joining intake passage 21 through which intake air that has passed through a first compressor 41 of a first supercharger 40 and intake air that has passed through a second compressor 61 of a second supercharger 60 join and pass. A throttle valve 23 is provided in the joining intake passage 21. In the internal combustion engine 20, a first air bypass valve 34 is provided in a first bypass 33 bypassing the first compressor 41 and a second air bypass valve 54 is provided in a second bypass 53 bypassing the second compressor 61. The control device 10 includes: an opening/closing determination section 12 determining that a valve opening condition is satisfied when reduction speed of target throttle passage amount is higher than a prescribed determination speed; and an ABV control section 11 opening the air bypass valves 34, 54 when the valve opening condition is satisfied.SELECTED DRAWING: Figure 1 【課題】二基の過給機を備える内燃機関の制御装置に関して、交互逆流現象の発生を抑制する。【解決手段】制御装置１０が適用される内燃機関２０は、第１過給機４０の第１コンプレッサ４１を通過した吸気と第２過給機６０の第２コンプレッサ６１を通過した吸気とが合流して通過する合流吸気路２１を備えている。合流吸気路２１には、スロットルバルブ２３が設けられている。内燃機関２０は、第１コンプレッサ４１を迂回する第１バイパス３３に、第１エアバイパスバルブ３４を備えており、第２コンプレッサ６１を迂回する第２バイパス５３に、第２エアバイパスバルブ５４を備えている。制御装置１０は、目標スロットル通過量の減少速度が規定の判定速度よりも速いときに開弁条件が成立していると判定する開閉判定部１２と、開弁条件が成立しているときにエアバイパスバルブ３４，５４を開弁するＡＢＶ制御部１１を備えている。【選択図】図１