INTERNAL COMBUSTION ENGINE CONTROL DEVICE

• Main Authors: UCHIDA TAKAHIRO, IDOGAWA MASANAO, KANEKO MASATO, SUGIMOTO MOTOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 27.09.2023
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

To reduce an amount of fuel blown through an exhaust passage during a valve overlap period.SOLUTION: An internal combustion engine control device is applied to an internal combustion engine 1 which comprises: a port injection valve 4 which injects fuel into an intake passage 3; a cylinder injection valve 20 which injects fuel not through the intake passage 3 but directly into a cylinder 18; and a supercharger 50 which supercharges intake air. Given that a ratio of an amount of the fuel injected through the port injection valve 4 to a total amount of the fuel subject to single time combustion in the cylinder 18 is defined as a port injection ratio, when a condition that the supercharger 50 is in operation to supercharge and a valve overlap period is in an engine operation region which is larger than zero is met, the internal combustion engine control device makes the port injection ratio smaller and a timing to start fuel injection through the port injection valve 4 later than when the condition is not met.SELECTED DRAWING: Figure 1 【課題】バルブオーバーラップ期間に排気通路に吹き抜ける燃料量を低減する。【解決手段】吸気通路３に燃料を噴射するポート噴射弁４と、吸気通路３を介さずに気筒１８内に直接燃料を噴射する筒内噴射弁２０と、吸気を過給する過給機５０と、を有する内燃機関１に適用され、気筒１８で１回の燃料の燃焼に供される総燃料量に対する、ポート噴射弁４から噴射される燃料量の比率をポート噴射比率としたとき、過給機５０が過給を行う運転状態であり、且つバルブオーバーラップ期間がゼロよりも大きい機関運転領域である、という条件を満たす場合には、同条件を満たさない場合に比較して、ポート噴射比率を小さく設定し、且つポート噴射弁４からの燃料噴射の開始タイミングを遅くする。【選択図】図１