CA2505799A1 - Engine intake a/f ratio control system in outboard engine system - Google Patents

Engine intake a/f ratio control system in outboard engine system Download PDF

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Publication number
CA2505799A1
CA2505799A1 CA002505799A CA2505799A CA2505799A1 CA 2505799 A1 CA2505799 A1 CA 2505799A1 CA 002505799 A CA002505799 A CA 002505799A CA 2505799 A CA2505799 A CA 2505799A CA 2505799 A1 CA2505799 A1 CA 2505799A1
Authority
CA
Canada
Prior art keywords
engine
secondary air
intake
ratio control
duty
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
CA002505799A
Other languages
French (fr)
Other versions
CA2505799C (en
Inventor
Hiroyuki Yoshida
Toyokazu Kawasaki
Yoshihiko Fukuda
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.)
Honda Motor Co Ltd
Original Assignee
Individual
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
Priority claimed from JP10222060A external-priority patent/JP2000054880A/en
Application filed by Individual filed Critical Individual
Publication of CA2505799A1 publication Critical patent/CA2505799A1/en
Application granted granted Critical
Publication of CA2505799C publication Critical patent/CA2505799C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F02D41/1456—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor output signal being linear or quasi-linear with the concentration of oxygen

Landscapes

  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

An intake A/F control device of an outboard engine, wherein a secondary air path (P) for feeding a mixture A/F regulating secondary air is connected to an intake system carburetor (33) of an engine (E) and a duty control unit (92) to control the duty ratio of pulses to be applied to a coil (76) is connected to a duty control valve (68) connected to the secondary air path (P), an LAF
sensor (94) which detects the A/F of the exhaust gas and inputs a detection signal in proportion to the A/F to the duty control unit (92) is installed in an exhaust system, whereby even when the allowance of purification rate of a catalytic converter is set rather larger with an engine output taken somewhat in consideration or even when a set width is shifted to the rich side of the A/F
with an emphasis placed on the engine output, the exhaust gas A/F can be controlled accurately to a desired target value.
CA002505799A 1998-08-05 1999-08-03 Engine intake a/f ratio control system in outboard engine system Expired - Fee Related CA2505799C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP10-222060 1998-08-05
JP10222060A JP2000054880A (en) 1998-08-05 1998-08-05 Intake a/f controller for outboard engine
CA002339260A CA2339260C (en) 1998-08-05 1999-08-03 Engine intake a/f ratio control system in outboard engine system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002339260A Division CA2339260C (en) 1998-08-05 1999-08-03 Engine intake a/f ratio control system in outboard engine system

Publications (2)

Publication Number Publication Date
CA2505799A1 true CA2505799A1 (en) 2000-02-17
CA2505799C CA2505799C (en) 2007-04-17

Family

ID=34679593

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002505799A Expired - Fee Related CA2505799C (en) 1998-08-05 1999-08-03 Engine intake a/f ratio control system in outboard engine system

Country Status (1)

Country Link
CA (1) CA2505799C (en)

Also Published As

Publication number Publication date
CA2505799C (en) 2007-04-17

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