JPS56159547A - Air to fuel ratio control system for engine - Google Patents

Air to fuel ratio control system for engine

Info

Publication number
JPS56159547A
JPS56159547A JP6353680A JP6353680A JPS56159547A JP S56159547 A JPS56159547 A JP S56159547A JP 6353680 A JP6353680 A JP 6353680A JP 6353680 A JP6353680 A JP 6353680A JP S56159547 A JPS56159547 A JP S56159547A
Authority
JP
Japan
Prior art keywords
air
engine
fuel ratio
actuators
air bleed
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.)
Granted
Application number
JP6353680A
Other languages
Japanese (ja)
Other versions
JPS6148626B2 (en
Inventor
Yoshio Yamakawa
Nobukatsu Ishikawa
Toshio Tanahashi
Isamu Hagino
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 JP6353680A priority Critical patent/JPS56159547A/en
Publication of JPS56159547A publication Critical patent/JPS56159547A/en
Publication of JPS6148626B2 publication Critical patent/JPS6148626B2/ja
Granted 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 density of NOx in the exhaust gas of the engine and improve the fuel consumption thereof by a method wherein a feedback control is stopped when the engine is being operated in a low load and a poor mixture having the air to fuel ratio larger than the logical air to fuel ratio is supplied to the engine.
CONSTITUTION: An air bleed conduit 16 is connected to a main fuel nozzle 10 provided in a small venturi 9 and another air bleed conduit 30 is connected to a slow port 25 provided at the vicinity of a throttle valve 7 respectively while proportional actuators 17, 31 are connected to each conduits 16, 30 respectively. These actuators 17, 31 are controlled by a computer 24 in accordance with the output of an exhaust sensor 40 and thereby controlling the amount of air bleed or the air to fuel ratio. Here, the computer 24 increases the opening areas of valve ports 18, 32 for respective actuators 17, 31 to make the mixture thin when the low load operation time excluding an idling operation time is detected by the outputs of negative pressure switches 62, 66 and an idling switch 64.
COPYRIGHT: (C)1981,JPO&Japio
JP6353680A 1980-05-13 1980-05-13 Air to fuel ratio control system for engine Granted JPS56159547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6353680A JPS56159547A (en) 1980-05-13 1980-05-13 Air to fuel ratio control system for engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6353680A JPS56159547A (en) 1980-05-13 1980-05-13 Air to fuel ratio control system for engine

Publications (2)

Publication Number Publication Date
JPS56159547A true JPS56159547A (en) 1981-12-08
JPS6148626B2 JPS6148626B2 (en) 1986-10-24

Family

ID=13232029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6353680A Granted JPS56159547A (en) 1980-05-13 1980-05-13 Air to fuel ratio control system for engine

Country Status (1)

Country Link
JP (1) JPS56159547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6379459U (en) * 1986-11-14 1988-05-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6379459U (en) * 1986-11-14 1988-05-25

Also Published As

Publication number Publication date
JPS6148626B2 (en) 1986-10-24

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