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 prevent overheating of catalyst converter by controlling a closing valve in a branch path connecting the inlet passage section and volute end section of a suction port in response to the amount of intake air volume and then by closing the valve forcibly when the catalyst temperature exceeds the predetermined value. CONSTITUTION:An inlet passage section A and a volute section B end section formed around a suction valve connected to the inlet passage section A are connected together by means of 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 independently of the intake air volume when the output of a temperature sensor 47 detecting the catalyst temperature of a catalyst converter 46 exceeds the predetermined value.