Cylinder direct injection spark-ignition engine

• Main Authors: TANIYAMA, TSUYOSHI, ISHIHARA, KOUJI, MIYAKUBO, HIROSHI
• Format: Patent
• Language: English; French; German
• Published: 12.11.2003
• Edition: 7
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; 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; WEAPONS

A cylinder direct injection spark-ignition engine in which fuel is directly injected from a fuel injector into each cylinder. The engine has an intake system having two intake ports for each cylinder. A swirl control valve is movably disposed in a passage connected to one of the intake ports. The swirl control valve functions to regulate the intensity (a swirl ratio) of swirl to be generated in the cylinder. Sensors are provided to detect an engine operating condition representative of a stratified charge combustion region. Additionally, a controller is provided to control the swirl control valve so as to change the swirl ratio in accordance an engine speed of the engine, when the current engine operating condition is detected to correspond to the stratified charge combustion region.