JPS55128136A - Measuring device for air-fuel ratio - Google Patents

Measuring device for air-fuel ratio

Info

Publication number
JPS55128136A
JPS55128136A JP3647579A JP3647579A JPS55128136A JP S55128136 A JPS55128136 A JP S55128136A JP 3647579 A JP3647579 A JP 3647579A JP 3647579 A JP3647579 A JP 3647579A JP S55128136 A JPS55128136 A JP S55128136A
Authority
JP
Japan
Prior art keywords
air
fuel ratio
analyzers
exhaust gas
content
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
JP3647579A
Other languages
Japanese (ja)
Other versions
JPS6333100B2 (en
Inventor
Tokihiro Tsukamoto
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.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors 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 Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP3647579A priority Critical patent/JPS55128136A/en
Publication of JPS55128136A publication Critical patent/JPS55128136A/en
Publication of JPS6333100B2 publication Critical patent/JPS6333100B2/ja
Granted legal-status Critical Current

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  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

PURPOSE:To minimize errors in the measurement of the air-fuel ratio by processing an analytic detection value of the content of the predetermined components in exhaust gas by LEPs having large time constants as compared with the response time of analyzers and by applying output from the LPFs to an air-fuel ratio calculating arithmetic circuit. CONSTITUTION:Exhaust gas from an engine is added to non-dispersion infrared analyzers 1f, 1'f and an ionization analyzer 2c to allow the carbon dioxide contnet CO2, carbon monoxide content CO and methane gas-converted hydrocarbon content THC in exhaust gas to detect in the forms of electric signals. These signals are applied to an analog computing element AO, in which the air-fuel ratio is calculated on the basis of a predetermined formula, through LPF's 3... having time constants greater than the response times of the analyzers 1f, 1'f, 2c, which are determined by respective resistors R and capacitors C. Accordingly, the air-fuel ratio can be measured with small errors the measuring operation being not influenced by the analyzers 1f, 1'f, 2c with different response speeds.
JP3647579A 1979-03-28 1979-03-28 Measuring device for air-fuel ratio Granted JPS55128136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3647579A JPS55128136A (en) 1979-03-28 1979-03-28 Measuring device for air-fuel ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3647579A JPS55128136A (en) 1979-03-28 1979-03-28 Measuring device for air-fuel ratio

Publications (2)

Publication Number Publication Date
JPS55128136A true JPS55128136A (en) 1980-10-03
JPS6333100B2 JPS6333100B2 (en) 1988-07-04

Family

ID=12470832

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3647579A Granted JPS55128136A (en) 1979-03-28 1979-03-28 Measuring device for air-fuel ratio

Country Status (1)

Country Link
JP (1) JPS55128136A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0374550A (en) * 1989-08-16 1991-03-29 Osaka Gas Co Ltd Miss fire detecting device for internal combustion engine
JPH07103895A (en) * 1993-09-30 1995-04-21 Mazda Motor Corp Concentration detector for exhaust gas component

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3899004B2 (en) * 2002-09-27 2007-03-28 株式会社堀場製作所 In-vehicle HC measuring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0374550A (en) * 1989-08-16 1991-03-29 Osaka Gas Co Ltd Miss fire detecting device for internal combustion engine
JPH07103895A (en) * 1993-09-30 1995-04-21 Mazda Motor Corp Concentration detector for exhaust gas component

Also Published As

Publication number Publication date
JPS6333100B2 (en) 1988-07-04

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