GB1492900A - Fuel enrichment control circuit for an internal combustion engine - Google Patents

Fuel enrichment control circuit for an internal combustion engine

Info

Publication number
GB1492900A
GB1492900A GB4093875A GB4093875A GB1492900A GB 1492900 A GB1492900 A GB 1492900A GB 4093875 A GB4093875 A GB 4093875A GB 4093875 A GB4093875 A GB 4093875A GB 1492900 A GB1492900 A GB 1492900A
Authority
GB
United Kingdom
Prior art keywords
engine
fuel
signal
switch
enriched
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
GB4093875A
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.)
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Motor Co Ltd
Ford Motor Co
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 Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Motor Co Ltd
Publication of GB1492900A publication Critical patent/GB1492900A/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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine
    • F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1015—Engines misfires
    • 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
    • F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

1492900 Automatic control systems FORD MOTOR CO Ltd 7 Oct 1975 [30 Oct 1974] 40938/75 Heading G3N The fuel supply to an I.C. engine is enriched if the measured engine acceleration is above a pre-set value and in a given frequency range. The enrichment is inversely proportional to the sensed engine temperature. As shown, a signal on input 110 having a frequency proportional to engine speed is integrated by amplifier 120 to form a voltage dependent upon the speed. This voltage is applied to a T-filter, differentiator and threshold circuit 18 which gives an output if the engine acceleration (or deceleration) is within a given frequency range indicative of engine roughness and is above a pre-set value. Provided the engine is running as sensed by circuit 20 from the input 110, and the above conditions are met, switch 46 is opened to open switch 44 and allow a signal inversely proportional to engine coolant temperature (as measured by thermistor 22) to pass via amplifiers 64 and 92 to form an output signal V that is used to enrich the engine fuel supply e.g. of a fuel injection system. The fuel is also enriched by opening switch 42 if the engine is being started, as sensed by circuit 20 from the engine ignition switch. The gain for the temperature dependent signal via switch 42 is different than via switch 44. In both cases the fuel enrichment is inversely proportional to engine temperature, and is multiplied by an engine fuel demand signal to form a fuel control signal. If the engine is not started and the acceleration is not within the given frequency range and above the pre-set value, the fuel is enriched by a signal of fixed magnitude as set by potentiometer 70 in switching circuit 12.
GB4093875A 1974-10-30 1975-10-07 Fuel enrichment control circuit for an internal combustion engine Expired GB1492900A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51915674A 1974-10-30 1974-10-30

Publications (1)

Publication Number Publication Date
GB1492900A true GB1492900A (en) 1977-11-23

Family

ID=24067089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4093875A Expired GB1492900A (en) 1974-10-30 1975-10-07 Fuel enrichment control circuit for an internal combustion engine

Country Status (3)

Country Link
JP (1) JPS5166935A (en)
DE (1) DE2548337A1 (en)
GB (1) GB1492900A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2479336A1 (en) * 1980-03-26 1981-10-02 Bosch Gmbh Robert CONTROL DEVICE FOR AN INTERNAL COMBUSTION ENGINE FUEL ASSAY SYSTEM

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58190515A (en) * 1982-04-30 1983-11-07 Nissan Diesel Motor Co Ltd Cooling fan controller for internal-combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2479336A1 (en) * 1980-03-26 1981-10-02 Bosch Gmbh Robert CONTROL DEVICE FOR AN INTERNAL COMBUSTION ENGINE FUEL ASSAY SYSTEM

Also Published As

Publication number Publication date
JPS5166935A (en) 1976-06-10
DE2548337A1 (en) 1976-05-06

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee