JPS57165649A - Control method of air-fuel ratio in carburetor for internal combustion engine - Google Patents

Control method of air-fuel ratio in carburetor for internal combustion engine

Info

Publication number
JPS57165649A
JPS57165649A JP5091681A JP5091681A JPS57165649A JP S57165649 A JPS57165649 A JP S57165649A JP 5091681 A JP5091681 A JP 5091681A JP 5091681 A JP5091681 A JP 5091681A JP S57165649 A JPS57165649 A JP S57165649A
Authority
JP
Japan
Prior art keywords
fuel
fuel ratio
air
negative pressure
slow
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
JP5091681A
Other languages
Japanese (ja)
Inventor
Toshiro Harada
Itsuo Komatsu
Masahiro Urushiya
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 JP5091681A priority Critical patent/JPS57165649A/en
Publication of JPS57165649A publication Critical patent/JPS57165649A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M3/00—Idling devices for carburettors
    • F02M3/02—Preventing flow of idling fuel

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE:To prevent misfiring due to an overlean state, by cutting off slow line fuel and maintaining air-fuel ratio almost to the logical air-fuel ratio with main line fuel in a range of operation specified from not lower than prescribed speed and not more than prescribed intake negative pressure of an engine. CONSTITUTION:At transient time when a fuel route in a carburetor 1 is switched from a slow feed to main feed, speed of an engine is at least a preset value while negative pressure of a negative pressure port 15 becomes not more than a preset value, and a signal current from an OR circuit in a control circuit 19 is controlled to open a switching element 19c, then a solenoid valve 17 is turned off to close slow feed fuel by a valve element 18. In this way, slow line negative pressure is not effected to the main line, then fuel in a float chamber 2 becomes easy to flow out from a main nozzle 13, and air-fuel ratio of a mixture is not so changed even at switching time, to become almost the logical air-fuel ratio. Accordingly, misfiring, deriving from an overlean state, and a change of engine torque, caused by the misfiring, are not caused.
JP5091681A 1981-04-02 1981-04-02 Control method of air-fuel ratio in carburetor for internal combustion engine Pending JPS57165649A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5091681A JPS57165649A (en) 1981-04-02 1981-04-02 Control method of air-fuel ratio in carburetor for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5091681A JPS57165649A (en) 1981-04-02 1981-04-02 Control method of air-fuel ratio in carburetor for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS57165649A true JPS57165649A (en) 1982-10-12

Family

ID=12872108

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5091681A Pending JPS57165649A (en) 1981-04-02 1981-04-02 Control method of air-fuel ratio in carburetor for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS57165649A (en)

Similar Documents

Publication Publication Date Title
JPS57165649A (en) Control method of air-fuel ratio in carburetor for internal combustion engine
JPS57157039A (en) System for restraining knocking in internal-cmbustion engine
JPS57206772A (en) Ignition timing control method on internal combustion engine
JPS57206723A (en) Engine with subintake line
JPS5728853A (en) Fuel supply apparatus of carburetor
JPS555407A (en) Air-fuel ratio controller for lpg engine
JPS5713256A (en) Mixture controller in internal combustion engine
JPS5650246A (en) Air-fuel ratio controller for carburetor
JPS55153833A (en) Revolution speed control system for internal combustion engine
JPS5791372A (en) Air-fuel ratio controller of internal combustion engine
JPS57157038A (en) Knocking restraining system for internal-combustion engine
JPS57116148A (en) Carbureter with two kind of throttle valve
JPS5756642A (en) Air-fuel ratio control of internal combustion engine
JPS6480735A (en) Multiple cylinder internal combustion engine
JPS5564125A (en) Air intake system for internal combustion engine
JPS5474927A (en) Carburetor internal combustion engine
JPS57131839A (en) Fuel supply device for internal-combustion engine
JPS57198325A (en) Fuel injection method of internal combustion engine
JPS5638539A (en) Controller for air-fuel ratio
JPS52139832A (en) Air-fuel ratio controller for internal combustion engine
JPS5783645A (en) Idling speed regulator for internal combustion engine
JPS57171055A (en) Carburettor utilizing alcohol and gasoline
JPS5652559A (en) Air-fuel ratio controller for lpg engine
JPS5738641A (en) Air-fuel ratio controller
JPS55109747A (en) Carbureter with starter