FR3075269B1 - METHOD FOR DETECTING A PRE-IGNITION OF A MIXTURE OF FRESH AIR AND FUEL - Google Patents

METHOD FOR DETECTING A PRE-IGNITION OF A MIXTURE OF FRESH AIR AND FUEL Download PDF

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Publication number
FR3075269B1
FR3075269B1 FR1762554A FR1762554A FR3075269B1 FR 3075269 B1 FR3075269 B1 FR 3075269B1 FR 1762554 A FR1762554 A FR 1762554A FR 1762554 A FR1762554 A FR 1762554A FR 3075269 B1 FR3075269 B1 FR 3075269B1
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FR
France
Prior art keywords
cycles
successive
ignition
mixture
average
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.)
Active
Application number
FR1762554A
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French (fr)
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FR3075269A1 (en
Inventor
Jerome PAILLARD
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.)
Renault SAS
Original Assignee
Renault SAS
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Publication date
Application filed by Renault SAS filed Critical Renault SAS
Priority to FR1762554A priority Critical patent/FR3075269B1/en
Publication of FR3075269A1 publication Critical patent/FR3075269A1/en
Application granted granted Critical
Publication of FR3075269B1 publication Critical patent/FR3075269B1/en
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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
    • F02D41/22—Safety or indicating devices for abnormal 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
    • F02D41/1497—With detection of the mechanical response of the engine
    • F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
    • 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
    • F02D2200/1002—Output torque
    • F02D2200/1004—Estimation of the output torque
    • 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
    • F02D2200/101—Engine speed
    • 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un procédé de détection d'un pré-allumage d'un mélange d'air frais et de carburant dans un cylindre (4) d'un moteur à combustion interne (1), ledit moteur à combustion interne étant piloté pour tourner à un régime de consigne et fonctionnant selon des cycles de combustion successifs. Selon l'invention, lorsque le moteur est utilisé dans un mode de fonctionnement stabilisé, par exemple lorsque les variations du régime de consigne sur trois cycles de combustion successifs restent inférieures à un seuil prédéterminé, on diagnostique un pré-allumage du mélange au cours du troisième des trois cycles de combustion successifs lorsque sont détectés au cours de ces trois cycles de combustion successifs deux baisses successives du régime moyen du moteur suffisamment grandes, chacune de ces deux baisses étant accompagnée d'une baisse importante du couple moyen de combustion calculé par couplemètre logiciel, une première baisse du couple moyen entre le premier et le deuxième des trois cycles et une deuxième baisse du couple moyen entre le deuxième et le troisième des trois cycles.The invention relates to a method for detecting a pre-ignition of a mixture of fresh air and fuel in a cylinder (4) of an internal combustion engine (1), said internal combustion engine being controlled to run at a set speed and operating according to successive combustion cycles. According to the invention, when the engine is used in a stabilized operating mode, for example when the variations in the reference speed over three successive combustion cycles remain below a predetermined threshold, a pre-ignition of the mixture is diagnosed during the third of the three successive combustion cycles when two successive decreases in the average engine speed sufficiently large are detected during these three successive combustion cycles, each of these two decreases being accompanied by a significant reduction in the average combustion torque calculated by torque meter software, a first drop in the average torque between the first and second of the three cycles and a second drop in the average torque between the second and the third of the three cycles.

FR1762554A 2017-12-19 2017-12-19 METHOD FOR DETECTING A PRE-IGNITION OF A MIXTURE OF FRESH AIR AND FUEL Active FR3075269B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1762554A FR3075269B1 (en) 2017-12-19 2017-12-19 METHOD FOR DETECTING A PRE-IGNITION OF A MIXTURE OF FRESH AIR AND FUEL

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1762554 2017-12-19
FR1762554A FR3075269B1 (en) 2017-12-19 2017-12-19 METHOD FOR DETECTING A PRE-IGNITION OF A MIXTURE OF FRESH AIR AND FUEL

Publications (2)

Publication Number Publication Date
FR3075269A1 FR3075269A1 (en) 2019-06-21
FR3075269B1 true FR3075269B1 (en) 2020-01-10

Family

ID=61521665

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1762554A Active FR3075269B1 (en) 2017-12-19 2017-12-19 METHOD FOR DETECTING A PRE-IGNITION OF A MIXTURE OF FRESH AIR AND FUEL

Country Status (1)

Country Link
FR (1) FR3075269B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4936277A (en) * 1988-12-19 1990-06-26 Motorola, Inc. System for monitoring and/or controlling multiple cylinder engine performance
EP0437057B1 (en) * 1990-01-08 1993-11-03 Hitachi, Ltd. Method and apparatus for detecting combustion conditions in a multicylinder internal combustion engine
FR2686653B1 (en) * 1992-01-24 1994-03-11 Renault Regie Nale Usines METHOD FOR DETECTION OF COMBUSTION RATES OF AN INTERNAL COMBUSTION ENGINE.
EP1955038A1 (en) * 2005-11-30 2008-08-13 The University of Queensland A method and apparatus for detecting engine knock

Also Published As

Publication number Publication date
FR3075269A1 (en) 2019-06-21

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