CONTROL APPARATUS AND CONTROL METHOD FOR DIRECT INJECTION SPARK IGNITION INTERNAL COMBUSTION ENGINE

• Main Author: ASHIZAWA, TAKESHI
• Format: Patent
• Language: English; French
• Published: 27.03.2008
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

An ECU (1) controls an internal combustion engine (50) that creates a tumble flow (T) in each engine cylinder and intensifies the tumble flow using fuel injected at a timing near the intake stole bottom dead center during homogenous combustion. The ECU (1) has fuel property identifying means (24) for identifying the property of fuel and combustion state changing means (1) for changing the combustion state. When the fuel has a property that requires a stoichiometric air-fuel ratio lower than the stoichiometric air-fuel ratio for gasoline, the combustion state changing means (1) changes the combustion state by, for example, ietaiding the ignition timing, so that the combustion progresses moderately. This prevents an excessive increase in the combustion speed. Selon l'invention, un ECU (1) commande un moteur à combustion interne (50) qui crée un écoulement tourbillonnaire (T) dans chaque cylindre du moteur et intensifie l'écoulement tourbillonnaire avec du carburant injecté selon un réglage effectué à proximité du point mort bas d'un temps d'admission, au cours de la combustion homogène. L'ECU (1) comprend un moyen d'identification de la propriété du carburant (24) et un moyen de changement de l'état de combustion (1). Lorsque le carburant a une propriété qui requiert un rapport air-carburant stoechiométrique inférieur à celui de l'essence, le moyen de changement de l'état de combustion (1) change l'état de combustion en retardant, par exemple, le réglage de l'allumage, de sorte que la combustion progresse de façon modérée, ce qui empêche une augmentation excessive de la vitesse de combustion.