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JPS56148654A - Air-fuel ratio control system of internal combustion engine - Google Patents

Air-fuel ratio control system of internal combustion engine

Info

Publication number
JPS56148654A
JPS56148654A JP5214780A JP5214780A JPS56148654A JP S56148654 A JPS56148654 A JP S56148654A JP 5214780 A JP5214780 A JP 5214780A JP 5214780 A JP5214780 A JP 5214780A JP S56148654 A JPS56148654 A JP S56148654A
Authority
JP
Japan
Prior art keywords
passage
air
valve
negative pressure
control system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5214780A
Other languages
Japanese (ja)
Inventor
Masatami Takimoto
Kisaburo Mizuno
Toshiaki Kawada
Ryoichi Nakayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP5214780A priority Critical patent/JPS56148654A/en
Publication of JPS56148654A publication Critical patent/JPS56148654A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: To increase the control characteristics under high load in an engine which feed-back controls the secondary air to the engine suction system by providing a negative pressure control valve on the air passage which increases its opening area under the high load.
CONSTITUTION: Air passage 9 and 12 are provided by-passing a throttle valve 5a and connecting the suction passages 5 and 2 at its upstream and downstream respectively. A solenoid valve 7 which turns on and off by a computer 6 receiving a signal from an oxygen sensor 4 on an exhaust passage 3 is provided on said air passage 9 to feed-back control the amount of the secondary air. A negative pressure control valve 8 is provided between the passage 9 and passage 12 and a negative pressure is introced thereto via a negative pressure port 5a at the upstream of the throttle valve 5a, whereby the valve seat 8d is opened up when the opening of the valve 5a exceeds certain limit to increase the amount of air flowing through the passage 12.
COPYRIGHT: (C)1981,JPO&Japio
JP5214780A 1980-04-18 1980-04-18 Air-fuel ratio control system of internal combustion engine Pending JPS56148654A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5214780A JPS56148654A (en) 1980-04-18 1980-04-18 Air-fuel ratio control system of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5214780A JPS56148654A (en) 1980-04-18 1980-04-18 Air-fuel ratio control system of internal combustion engine

Publications (1)

Publication Number Publication Date
JPS56148654A true JPS56148654A (en) 1981-11-18

Family

ID=12906755

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5214780A Pending JPS56148654A (en) 1980-04-18 1980-04-18 Air-fuel ratio control system of internal combustion engine

Country Status (1)

Country Link
JP (1) JPS56148654A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202662U (en) * 1985-06-08 1986-12-19

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5455235A (en) * 1977-10-07 1979-05-02 Mitsubishi Motors Corp Mixed-gas feeding apparatus
JPS555473A (en) * 1978-06-27 1980-01-16 Nippon Soken Inc Air-fuel ratio controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5455235A (en) * 1977-10-07 1979-05-02 Mitsubishi Motors Corp Mixed-gas feeding apparatus
JPS555473A (en) * 1978-06-27 1980-01-16 Nippon Soken Inc Air-fuel ratio controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202662U (en) * 1985-06-08 1986-12-19

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