JPS56124661A - Air-fuel ratio controlling apparatus for internal combustion engine utilizing liquefied petroleum gas - Google Patents

Air-fuel ratio controlling apparatus for internal combustion engine utilizing liquefied petroleum gas

Info

Publication number
JPS56124661A
JPS56124661A JP2848680A JP2848680A JPS56124661A JP S56124661 A JPS56124661 A JP S56124661A JP 2848680 A JP2848680 A JP 2848680A JP 2848680 A JP2848680 A JP 2848680A JP S56124661 A JPS56124661 A JP S56124661A
Authority
JP
Japan
Prior art keywords
air
fuel ratio
fuel
liquefied petroleum
petroleum gas
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
JP2848680A
Other languages
Japanese (ja)
Other versions
JPS6310298B2 (en
Inventor
Kaoru Uno
Seietsu Yoshida
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.)
Denso Corp
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
NipponDenso 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 Toyota Motor Corp, NipponDenso Co Ltd filed Critical Toyota Motor Corp
Priority to JP2848680A priority Critical patent/JPS56124661A/en
Publication of JPS56124661A publication Critical patent/JPS56124661A/en
Publication of JPS6310298B2 publication Critical patent/JPS6310298B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: To purify exhaust gas of an engine utilizing liquefied petroleum gas, by resetting a base air-fuel ratio changing a means forcibly when an air-fuel ratio controlling signal represents an upper limit value on the rich side in an air-fuel ratio controlling apparatus for the engine.
CONSTITUTION: Fuel in a liquefied petroleum gas regulator 10 is supplied to a mixer 22 from a main fuel passage 14 and a by-pass passage 32 having a base air- fuel ratio changing valve 34. At the same time, fuel is also injected to a downstream portion of a throttle valve 19 from an auxiliary fuel injection valve 30. Output signals of an air-fuel ratio sensor 26 and a vacuum sensor 46 are given to a control means 35A, which controls the opening of the change-over valve 34 and the injection valve 30 on the basis of the output signals of the two sensors 26, 46. Further, when the air-fuel ratio sensor 26 represents an upper limit value on the rich side, the control means 35A resets the change-over valve 34 for a predetermined while for keeping the fuel flow rate in the passage 32 constant.
COPYRIGHT: (C)1981,JPO&Japio
JP2848680A 1980-03-06 1980-03-06 Air-fuel ratio controlling apparatus for internal combustion engine utilizing liquefied petroleum gas Granted JPS56124661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2848680A JPS56124661A (en) 1980-03-06 1980-03-06 Air-fuel ratio controlling apparatus for internal combustion engine utilizing liquefied petroleum gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2848680A JPS56124661A (en) 1980-03-06 1980-03-06 Air-fuel ratio controlling apparatus for internal combustion engine utilizing liquefied petroleum gas

Publications (2)

Publication Number Publication Date
JPS56124661A true JPS56124661A (en) 1981-09-30
JPS6310298B2 JPS6310298B2 (en) 1988-03-05

Family

ID=12249987

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2848680A Granted JPS56124661A (en) 1980-03-06 1980-03-06 Air-fuel ratio controlling apparatus for internal combustion engine utilizing liquefied petroleum gas

Country Status (1)

Country Link
JP (1) JPS56124661A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58206858A (en) * 1982-05-26 1983-12-02 Mikuni Kogyo Co Ltd Fuel system for fuel precedence type lpg engine
JPS6345439A (en) * 1986-08-11 1988-02-26 Toyota Motor Corp Air-fuel ratio controller for internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58206858A (en) * 1982-05-26 1983-12-02 Mikuni Kogyo Co Ltd Fuel system for fuel precedence type lpg engine
JPS6345439A (en) * 1986-08-11 1988-02-26 Toyota Motor Corp Air-fuel ratio controller for internal combustion engine

Also Published As

Publication number Publication date
JPS6310298B2 (en) 1988-03-05

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