GB1510405A - Closed-loop mixture control system for an internal combustion engine with exhaust gas circulation - Google Patents

Closed-loop mixture control system for an internal combustion engine with exhaust gas circulation

Info

Publication number
GB1510405A
GB1510405A GB23822/76A GB2382276A GB1510405A GB 1510405 A GB1510405 A GB 1510405A GB 23822/76 A GB23822/76 A GB 23822/76A GB 2382276 A GB2382276 A GB 2382276A GB 1510405 A GB1510405 A GB 1510405A
Authority
GB
United Kingdom
Prior art keywords
engine
exhaust
low
temperature
closed
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.)
Expired
Application number
GB23822/76A
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of GB1510405A publication Critical patent/GB1510405A/en
Expired legal-status Critical Current

Links

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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • 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
    • F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions
    • F02D41/1488—Inhibiting the regulation
    • F02D41/1489—Replacing of the control value by a constant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

1510405 Automatic control of engine exhaust NISSAN MOTOR CO Ltd 9 June 1976 [ 9 June 1975] 23822/76 Heading G3R [Also in Division F 1] An I.C. engine in a road vehicle has a three-way catalytic converter 7 for its exhaust, a proportion of exhaust gas is recirculated, and the air/fuel ratio is controlled in response to an exhaust component sensor 3. The signal from the latter is compared with a reference and the result applied to a proportioned and integral controller 4 to adjust a carburetter 5. Exhaust recirculation is controlled by Venturi depression and is via a conduit 9 which may be closed by a valve 10b at low engine temperature, measured at 13. The ratio control signal is clamped at a rich value when the engine temperature is low, the engine is idling (detected by gear neutral switch 14 and throttle closed switch 15a) or at full throttle (switch 15b). Also at low temperature the ignition is retarded by blocking the normal vacuum advance device. To prevent excessive vacuum when the throttle is "snapped shut" a device 20 provides some opening, under the control of vacuum and engine speed detector 22. Fuel evaporated from tank 24 is collected at 25 and stored in a carbon filled canister 27, from which it is fed to the engine under vacuum control. The air/fuel ratio is also adjusted in response to an altitude detector 33. The catalytic converter may be externally heated from the exhaust pipe. In a modification, Figs. 2 and 3 (not shown) an "abnormallity detector" cuts out the proportional channel, disables the integrating channel (to produce a "rich" control signal) and blocks the exhaust recirculation if (i) the converter temperature is too high, (ii) the exhaust gas temperature is too low for the oxygen sensor to operate, (iii) speed is high and throttle is closed for (iv) the oxygen sensor output is high or low for longer than a prescribed time. In another modification, Figs 4 and 6 (not shown) the mixture is enriched and the recirculation is blocked at low engine temperatures by transistor circuits which modify the reference value for the oxygen sensor inversely as the temperature until a set value is reached.
GB23822/76A 1975-06-09 1976-06-09 Closed-loop mixture control system for an internal combustion engine with exhaust gas circulation Expired GB1510405A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50069926A JPS51144828A (en) 1975-06-09 1975-06-09 Synthetic exhaust countermeasure system for internal combustion engine

Publications (1)

Publication Number Publication Date
GB1510405A true GB1510405A (en) 1978-05-10

Family

ID=13416768

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23822/76A Expired GB1510405A (en) 1975-06-09 1976-06-09 Closed-loop mixture control system for an internal combustion engine with exhaust gas circulation

Country Status (6)

Country Link
JP (1) JPS51144828A (en)
DE (1) DE2625816A1 (en)
FR (1) FR2314365A1 (en)
GB (1) GB1510405A (en)
IT (1) IT1074479B (en)
SE (1) SE436147B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279275A (en) * 1989-10-05 1994-01-18 Siemens Aktiengesellschaft Process for operating an internal combustion engine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54158527A (en) * 1978-06-02 1979-12-14 Hitachi Ltd Electronic type fuel control device for internal combustion engine
GB2035453B (en) * 1978-12-06 1983-03-23 Nissan Motor I.c. engine gas recirculation and idling air control system
JPS6030450Y2 (en) * 1979-03-26 1985-09-12 日産自動車株式会社 Exhaust pipe of engine with cylinder number control
JPS5851274A (en) * 1981-09-19 1983-03-25 Nissan Motor Co Ltd Electronic control apparatus for engine
US7845599B2 (en) 2007-03-22 2010-12-07 The Viking Corporation Mounting coupling for sprinkler support system
DE102014200338A1 (en) 2014-01-10 2015-07-16 Robert Bosch Gmbh Method and device for controlling or regulating an exhaust gas recirculation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5028563B1 (en) * 1969-12-29 1975-09-17
JPS4967024A (en) * 1972-11-01 1974-06-28
DE2301354C3 (en) * 1973-01-12 1981-03-12 Robert Bosch Gmbh, 7000 Stuttgart Device for regulating the fuel-air ratio in internal combustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279275A (en) * 1989-10-05 1994-01-18 Siemens Aktiengesellschaft Process for operating an internal combustion engine

Also Published As

Publication number Publication date
AU1472576A (en) 1977-09-01
DE2625816A1 (en) 1976-12-23
SE7606493L (en) 1976-12-10
FR2314365B1 (en) 1979-09-28
SE436147B (en) 1984-11-12
IT1074479B (en) 1985-04-20
FR2314365A1 (en) 1977-01-07
JPS51144828A (en) 1976-12-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee