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FR3158121B1 - METHOD FOR DETECTING A FUEL LEAK IN A HIGH-PRESSURE FUEL INJECTION SYSTEM - Google Patents

METHOD FOR DETECTING A FUEL LEAK IN A HIGH-PRESSURE FUEL INJECTION SYSTEM

Info

Publication number
FR3158121B1
FR3158121B1 FR2400041A FR2400041A FR3158121B1 FR 3158121 B1 FR3158121 B1 FR 3158121B1 FR 2400041 A FR2400041 A FR 2400041A FR 2400041 A FR2400041 A FR 2400041A FR 3158121 B1 FR3158121 B1 FR 3158121B1
Authority
FR
France
Prior art keywords
value
pump
pressure
fuel
detecting
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
FR2400041A
Other languages
French (fr)
Other versions
FR3158121A1 (en
Inventor
Michaël Ledin
Jérémy Ferrandiz
Nicolas Loubet
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.)
Vitesco Technologies
Original Assignee
Vitesco Technologies
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 Vitesco Technologies filed Critical Vitesco Technologies
Priority to FR2400041A priority Critical patent/FR3158121B1/en
Priority to PCT/EP2024/088082 priority patent/WO2025146388A1/en
Publication of FR3158121A1 publication Critical patent/FR3158121A1/en
Application granted granted Critical
Publication of FR3158121B1 publication Critical patent/FR3158121B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
    • F02D19/0647—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • 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
    • F02D2041/224—Diagnosis of the fuel system
    • F02D2041/225—Leakage detection
    • 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
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3818—Common rail control systems for petrol engines

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L’invention propose un procédé de détection d’une fuite de carburant vers l’extérieur dans un circuit (130, 128, 120, 132) d’injection à haute pression de carburant comprenant une pompe (130), un rail d’alimentation (120), au moins un injecteur (132), un capteur (25) de pression dans le rail (120), un calculateur (10) configuré pour générer des événements d’activation de la pompe (130), le procédé étant mis en œuvre lors d’une phase de coupure de l’injection et comportant des étapes consistant à comparer une valeur de la pression mesurée par le capteur avec une valeur de consigne de la pression de carburant ; et si la valeur mesurée est inférieure à la valeur de consigne, faire fonctionner la pompe haute pression (130) en vue de ramener la valeur mesurée à la valeur de consigne en déclenchant au moins un événement de pompe et en incrémentant un compteur d’événements de pompe d’au moins une unité jusqu’à ce que la valeur mesurée soit supérieure ou égale à la valeur de consigne. Lorsque la valeur du compteur d’événements de pompe dépasse une valeur de seuil, le procédé génère une alarme indiquant une fuite de carburant. Figure pour l'abrégé : Figure 1The invention provides a method for detecting an external fuel leak in a high-pressure fuel injection circuit (130, 128, 120, 132) comprising a pump (130), a supply rail (120), at least one injector (132), a pressure sensor (25) in the rail (120), a computer (10) configured to generate pump (130) activation events, the method being implemented during an injection cut-off phase and comprising steps consisting of comparing a pressure value measured by the sensor with a fuel pressure setpoint value; and if the measured value is less than the setpoint value, operating the high-pressure pump (130) in order to bring the measured value back to the setpoint value by triggering at least one pump event and incrementing a pump event counter by at least one unit until the measured value is greater than or equal to the setpoint value. When the pump event counter value exceeds a threshold value, the process generates an alarm indicating a fuel leak. See Figure 1 for abbreviations.

FR2400041A 2024-01-04 2024-01-04 METHOD FOR DETECTING A FUEL LEAK IN A HIGH-PRESSURE FUEL INJECTION SYSTEM Active FR3158121B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR2400041A FR3158121B1 (en) 2024-01-04 2024-01-04 METHOD FOR DETECTING A FUEL LEAK IN A HIGH-PRESSURE FUEL INJECTION SYSTEM
PCT/EP2024/088082 WO2025146388A1 (en) 2024-01-04 2024-12-20 Method for detecting a fuel leak in a high-pressure fuel injection circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2400041 2024-01-04
FR2400041A FR3158121B1 (en) 2024-01-04 2024-01-04 METHOD FOR DETECTING A FUEL LEAK IN A HIGH-PRESSURE FUEL INJECTION SYSTEM

Publications (2)

Publication Number Publication Date
FR3158121A1 FR3158121A1 (en) 2025-07-11
FR3158121B1 true FR3158121B1 (en) 2025-11-21

Family

ID=89661100

Family Applications (1)

Application Number Title Priority Date Filing Date
FR2400041A Active FR3158121B1 (en) 2024-01-04 2024-01-04 METHOD FOR DETECTING A FUEL LEAK IN A HIGH-PRESSURE FUEL INJECTION SYSTEM

Country Status (2)

Country Link
FR (1) FR3158121B1 (en)
WO (1) WO2025146388A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856203C2 (en) * 1998-12-05 2001-12-06 Bosch Gmbh Robert Fuel supply system for an internal combustion engine, in particular of a motor vehicle
DE102011075870B4 (en) * 2011-05-16 2025-05-15 Robert Bosch Gmbh Method for evaluating the functionality of a fuel injection system of an internal combustion engine
JP5774521B2 (en) 2012-02-28 2015-09-09 株式会社デンソー Fuel leak detection device
FR3098551B1 (en) * 2019-07-11 2022-05-13 Continental Automotive Gmbh diagnostic method for a high pressure injection system
US11459970B2 (en) * 2021-02-24 2022-10-04 Caterpillar Inc. Fuel leak detection system

Also Published As

Publication number Publication date
WO2025146388A1 (en) 2025-07-10
FR3158121A1 (en) 2025-07-11

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Legal Events

Date Code Title Description
PLFP Fee payment

Year of fee payment: 2

PLSC Publication of the preliminary search report

Effective date: 20250711