PASSAGE CONTROL DEVICE OF HELICAL SUCTION PORT

• Main Authors: KATOU KENJI, MATSUSHITA SOUICHI, INOUE TOKUTA, YAMADA TOSHIO
• Format: Patent
• Language: English
• Published: 19.02.1983
• 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; WEAPONS

PURPOSE:To ensure the stable combustion when the load is abruptly reduced by controlling the closing valve in a branch path connecting between the inlet passage section and volute end section of said helical suction port in response to the amount of the intake air volume and then by opening said valve in response to the variations of the intake air negative pressure. CONSTITUTION:The inlet passage section A of a helical suction port 6 and the volute section B end section formed around a suction valve connected to the inlet passage section A are connected to each other by a branch path 14, which is opened or closed by a rotary valve 18. An electronic control unit 50 controls an atmosphere connection control valve 36, which controls a negative pressure diaphragm unit 30, which in turn controls the opening or closing of the rotary valve 18. Said unit 50 controls the valve 18 to open when the intake air volume exceeds the predetermined value, and it is formed so as to close the valve 18 abruptly when it is detected by a negative pressure sensor 59 that the variation per unit time of the intake air negative pressure value exceeds a certain value and to close the valve gradually when the variation is below a certain value.