JPS55134741A - Controlling device of air-fuel ratio for carburetor - Google Patents

Controlling device of air-fuel ratio for carburetor

Info

Publication number
JPS55134741A
JPS55134741A JP4356279A JP4356279A JPS55134741A JP S55134741 A JPS55134741 A JP S55134741A JP 4356279 A JP4356279 A JP 4356279A JP 4356279 A JP4356279 A JP 4356279A JP S55134741 A JPS55134741 A JP S55134741A
Authority
JP
Japan
Prior art keywords
air
fuel ratio
exhaust
controlling
aimed
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
JP4356279A
Other languages
Japanese (ja)
Inventor
Shigetaka Takada
Toshikatsu Haneda
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.)
Aisan Industry Co Ltd
Original Assignee
Aisan Industry Co Ltd
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 Aisan Industry Co Ltd filed Critical Aisan Industry Co Ltd
Priority to JP4356279A priority Critical patent/JPS55134741A/en
Publication of JPS55134741A publication Critical patent/JPS55134741A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To reduce the amount of NOx produced at the time of low-load and high- load operation of an engine by means of air-fuel ratio controlling system in which the amount of bleed-air to carburetor is feedback controlled by use of a signal from an exhaust-gas sensor, by controlling to make mixture richer during the while when the signal from the exhaust-gas sensor indicates that the actual air-fuel ratio is higher than an aimed air-fuel ratio.
CONSTITUTION: An auxiliary air-bleed passage 12 having electromagnetic valve 7 is communicated to main and slow-speed fuel passages of carburetor 6 for controlling the air-fuel ratio. On the other hand, signals from sensor 10 for detecting partial vacuum in the intake pipe, intake pressure sensor 11 and exhaust-gas sensor 3 are afforded to control circuit 9 for controlling the opening of electromagnetic valve 7, so as to attain an optimal efficiency of ternary ctalyst 4 in exhaut pipe 2. In the control circuit 9, the actual air-fuel ratio calculated from the above signals is compared with an aimed air-fuel ratio. The control circuit 9 is operated to make the time change of the integration signal greater (that is, to make the aimed air-fuel ratio smaller) during the while when air-fuel ratio of exhaust gas is greater than the aimed air-fuel ratio. This period corresponds to low- and high-load operation of engine, and the system operates to reduce the amount of NOx produced in this period.
COPYRIGHT: (C)1980,JPO&Japio
JP4356279A 1979-04-10 1979-04-10 Controlling device of air-fuel ratio for carburetor Pending JPS55134741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4356279A JPS55134741A (en) 1979-04-10 1979-04-10 Controlling device of air-fuel ratio for carburetor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4356279A JPS55134741A (en) 1979-04-10 1979-04-10 Controlling device of air-fuel ratio for carburetor

Publications (1)

Publication Number Publication Date
JPS55134741A true JPS55134741A (en) 1980-10-20

Family

ID=12667177

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4356279A Pending JPS55134741A (en) 1979-04-10 1979-04-10 Controlling device of air-fuel ratio for carburetor

Country Status (1)

Country Link
JP (1) JPS55134741A (en)

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