EP3070279B1 - Système de détection d'une défaillance dans un système d'huile lubrifiante d'un moteur à combustion interne muni d'une source d'huile réglable - Google Patents

Système de détection d'une défaillance dans un système d'huile lubrifiante d'un moteur à combustion interne muni d'une source d'huile réglable Download PDF

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Publication number
EP3070279B1
EP3070279B1 EP15160189.5A EP15160189A EP3070279B1 EP 3070279 B1 EP3070279 B1 EP 3070279B1 EP 15160189 A EP15160189 A EP 15160189A EP 3070279 B1 EP3070279 B1 EP 3070279B1
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EP
European Patent Office
Prior art keywords
oil
control signal
expected
combustion engine
adjustable
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EP15160189.5A
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German (de)
English (en)
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EP3070279A1 (fr
Inventor
Jonathan Borg
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FPT Motorenforschung AG
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FPT Motorenforschung AG
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Priority to ES15160189T priority Critical patent/ES2828965T3/es
Priority to EP15160189.5A priority patent/EP3070279B1/fr
Publication of EP3070279A1 publication Critical patent/EP3070279A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/18—Indicating or safety devices
    • F01M1/20—Indicating or safety devices concerning lubricant pressure

Definitions

  • the present invention relates to a system for detecting a failure in a lubricating oil circuit provided with an adjustable oil source, in the field of the internal combustion engines.
  • US5339775 shows a lubricating system comprising a bypass valve connected to the outlet of an oil pump in order to adjust the oil pressure according to certain parameters.
  • Other systems such as the one in US2005/118 033 A1 exploit the implementation of a variable pump.
  • An oil source refers herein both to the fixed pump with controllable bypass valve or to a variable pump or another similar equivalent system.
  • the parameters usually acquired are the oil temperature, the oil pressure.
  • Such systems usually adapt the oil source in order to achieve a predefined pressure in the main gallery of the lubricating oil circuit.
  • Suitable maps can be stored in a non volatile memory of the engine control unit in order to adapt the oil pressure in the main gallery according to the combustion engine operating conditions.
  • control system could be exploited also for other different aims.
  • the main object of the present invention is to provide a system for detecting a failure in the combustion engine lubricating oil system provided with an adjustable oil source.
  • the main principle of the invention is based on the comparison of the actual signal control with an expected one for a given oil pressure, and in case a mismatch is detected an action is carried out.
  • a function is stored, or arrays or maps, to calculate or contain control signal values, for controlling the adjustable oil source, and two or more corresponding pressure values for at least a predetermined point of the lubricating oil circuit in normal operating condition of the combustion engine.
  • These pressure values are referred as “expected pressure values” and these control signal values are referred as “expected control signal values”.
  • This invention is particularly indicated for those oil source controlled through a feedback control scheme.
  • the oil path, through said bearing could be interrupted or enlarged by determining, respectively, an oil pressure increase or drop with respect to an expected pressure value.
  • Nozzles are implemented in order to cool the engine pistons though the same combustion engine lubricating oil. When, due to impurities, the nozzle is obstructed, an oil pressure increase with respect to an expected pressure value.
  • control signal variation with respect to a predetermined one is detected and exploited to detect a failure in the combustion engine lubricating oil system.
  • second element does not imply the presence of a "first element”, first, second, etc.. are used only for improving the clarity of the description and they should not be interpreted in a limiting way.
  • the present invention refers to a internal combustion engine 10, see figure 3 , provided with a lubricating oil system having at least
  • the method is executed when the oil temperature exceeds a predefined temperature threshold, due to the fact that the oil viscosity, and thus, the oil pressure are influenced by the oil temperature.
  • the pressure values are mapped in a multidimensional array on temperature discrete values, in order to account for the viscosity variation, that, as known varies with the temperature.
  • the oil pressure is continuously acquired and, according to a given engine operation point an actual control signal value for controlling the adjustable oil source is determined or acquired.
  • An expected oil pressure is acquired from said non-volatile memory and compared with a measured one.
  • a mismatch lower than a first threshold Th1 is neglected, while a mismatch exceeding said first threshold Th1 determines, for example, the activation of a lamp in the dashboard (Action 1), while a mismatch exceeding a second threshold Th2 determines the activation of a recovery mode (Action 2), wherein the combustion engine is controlled in order to limit its speed and torque.
  • Th1 is lower than Th2.
  • an engine speed sensor 46 and a engine load sensor/estimator 48 are connected to the control unit in order to determined the engine operation point.
  • control unit coincides with the Engine Control Unit.
  • the method can be favourable executed when the oil temperature exceeds a predetermined threshold, namely when the oil viscosity is stabilized and the result of the method is meaningful.
  • the control signal values are interrelated with the oil pressures values and the oil temperature values, in order to account also for the viscosity variations of the oil.
  • neural networks are implemented to run time calculate the expected oil pressure according to several engine parameters.
  • the predetermined strategies to control the oil source can be any, and in any case, not relevant for the present invention.
  • a function/algorithm is stored and executed by the control unit 40 in order to run time calculate an expected oil pressure (or control signal) and to compare such expected oil pressure (or control signal), on the basis of the corresponding control signal of the controllable oil pump (or pressure) with the actual measured one.
  • such expected oil pressure values can be pre-stored or run time calculated.
  • Figure 1 shows an example not covered by the present invention comprising the following steps:
  • the 2D map shown on figure 1 becomes a 3D map or a multidimensional map according to the number of parameters accounted, influencing the pressure in the oil circuit with the same control signal applied to the oil source.
  • FIG. 2 shows the method subject of the present invention comprising the following steps:
  • This invention can be implemented advantageously in a computer program comprising program code means for performing one or more steps of such method, when such program is run on a computer.
  • the patent shall also cover such computer program and the computer-readable medium that comprises a recorded message, such computer-readable medium comprising the program code means for performing one or more steps of such method, when such program is run on a computer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Claims (11)

  1. Procédé de détection d'une défaillance dans un système d'huile de lubrification de moteur à combustion pourvu d'une source d'huile réglable, commandé par un signal de commande par un schéma de commande à rétroaction, le procédé étant basé sur une comparaison, pour une valeur de pression d'huile mesurée, entre :
    - un signal de commande réel de ladite source réglable, visant à forcer la valeur de pression d'huile mesurée à une valeur de pression d'huile attendue (EP), et
    - un signal de commande attendu ;
    dans le cas où une non-concordance entre lesdits signaux de commande est détectée, une défaillance dans le système d'huile de lubrification est détectée et une action est effectuée.
  2. Procédé selon la revendication 1, comprenant les étapes suivantes :
    - (Étape 11) l'acquisition ou le calcul, selon les paramètres de moteur à combustion, de ladite valeur de pression d'huile attendue (EP) en un point prédéterminé d'un circuit d'huile dudit système d'huile de lubrification,
    - (Étape 12) l'acquisition ou le calcul d'un signal de commande attendu (ECS) pour ladite source d'huile réglable correspondant à ladite valeur de pression d'huile attendue (EP),
    - (Étape 13) la mesure de ladite valeur de pression d'huile (AP) dans ledit un point prédéterminé dudit circuit d'huile,
    - (Étape 14) le calcul dudit signal de commande réel visant à forcer ladite valeur de pression d'huile à s'accorder avec ladite une valeur attendue (EP),
    - (Étape 15) la comparaison dudit signal de commande attendu (ECS) avec ledit signal de commande réel (ACS), dans le cas où une différence est en-dessous d'un seuil (Th1, Th2), la répétition des étapes ci-dessus, sinon
    - (Étape 17, Étape 18) la réalisation d'une action prédéterminée.
  3. Procédé selon la revendication 2, dans lequel deux valeurs de signal de commande attendu (ECS) ou plus sont stockées dans un premier emplacement d'une mémoire non volatile d'une première unité de commande.
  4. Procédé selon la revendication 2, dans lequel les valeurs dudit signal de commande attendu sont calculées, par temps d'exécution, selon les caractéristiques de circuit d'huile et les paramètres de moteur à combustion.
  5. Procédé selon l'une quelconque des revendications précédentes de 1 à 4, dans lequel ladite action comprend au moins l'une des actions suivantes :
    - signaler un dysfonctionnement du système d'huile de lubrification,
    - forcer un mode de récupération dans les performances de moteur à combustion.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel le procédé est exécuté lorsqu'une température d'huile dépasse un seuil prédéterminé, ou dans lequel ladite pression d'huile attendue ou ledit signal de commande attendu tient compte d'une variation de la viscosité de l'huile comme fonction d'une température d'huile.
  7. Système de détection d'une défaillance dans un système d'huile de lubrification de moteur à combustion pourvu d'une source d'huile réglable et de moyens de commande (40) qui commandent ladite source d'huile réglable (AS) au moyen d'un signal de commande relatif selon une stratégie de commande prédéterminée, d'au moins un capteur de pression (47) agencé en un point prédéterminé d'un circuit d'huile dudit système d'huile de lubrification, dans lequel lesdits moyens de commande sont adaptés pour réaliser toutes les étapes de l'une quelconque des revendications précédentes de 1 à 6.
  8. Moteur à combustion interne comprenant un système d'huile de lubrification pourvu d'une source d'huile réglable et de moyens de commande (40) qui commandent ladite source d'huile réglable (AS) au moyen d'un signal de commande relatif selon une stratégie de commande prédéterminée, et caractérisé en ce qu'il comprend un système de détection d'une défaillance dans ledit système d'huile de lubrification de moteur à combustion selon la revendication 7.
  9. Véhicule terrestre ou installation fixe caractérisé(e) en ce qu'il/elle comprend le moteur à combustion selon la revendication 8.
  10. Programme informatique comprenant des moyens de code de programme informatique adaptés pour réaliser toutes les étapes de l'une quelconque des revendications de 1 à 6, lorsque ledit programme est exécuté sur un ordinateur.
  11. Support lisible par ordinateur sur lequel est enregistré un programme, ledit support lisible par ordinateur comprenant des moyens de code de programme informatique adaptés pour réaliser toutes les étapes de l'une quelconque des revendications de 1 à 6, lorsque ledit programme est exécuté sur un ordinateur.
EP15160189.5A 2015-03-20 2015-03-20 Système de détection d'une défaillance dans un système d'huile lubrifiante d'un moteur à combustion interne muni d'une source d'huile réglable Active EP3070279B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES15160189T ES2828965T3 (es) 2015-03-20 2015-03-20 Sistema para detectar un fallo en un sistema de aceite lubricante de motor de combustión provisto de una fuente de aceite regulable
EP15160189.5A EP3070279B1 (fr) 2015-03-20 2015-03-20 Système de détection d'une défaillance dans un système d'huile lubrifiante d'un moteur à combustion interne muni d'une source d'huile réglable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15160189.5A EP3070279B1 (fr) 2015-03-20 2015-03-20 Système de détection d'une défaillance dans un système d'huile lubrifiante d'un moteur à combustion interne muni d'une source d'huile réglable

Publications (2)

Publication Number Publication Date
EP3070279A1 EP3070279A1 (fr) 2016-09-21
EP3070279B1 true EP3070279B1 (fr) 2020-08-12

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10480425B2 (en) * 2018-03-16 2019-11-19 GM Global Technology Operations LLC Method of managing a propulsion system based on health of a lubrication system
DE102019214080A1 (de) * 2019-09-16 2021-03-18 Vitesco Technologies GmbH Verfahren zur Überwachung eines mittels einer Ölpumpe erzeugten Ölflusses in einem Ölkühlkreis eines Thermomanagementsystems
CN113530619A (zh) * 2021-08-18 2021-10-22 浙江大学 基于润滑油系统参数相关性分析的汽机跳机征兆捕捉方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050118033A1 (en) * 2001-05-14 2005-06-02 Joma-Hydromechanic Gmbh Method for adjusting a volumetric flow-variable positive displacement pump in an internal combustion engine
US20120245819A1 (en) * 2011-03-25 2012-09-27 Continental Automotive Gmbh Method For Monitoring An Electromotively Driven Fuel Pump And Fuel Feed Unit Having A Fuel Pump

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339775A (en) 1994-01-03 1994-08-23 Caterpillar Inc. Cooling arrangement for a piston assembly
US5987975A (en) * 1997-12-18 1999-11-23 Rafei; Iraj Machine lubrication system monitor
US6614345B2 (en) * 2000-08-30 2003-09-02 Honda Giken Kogyo Kabushiki Kaisha Oil pressure warning system for outboard motor
JP2002371902A (ja) * 2001-04-11 2002-12-26 Sanshin Ind Co Ltd 水ジェット推進艇のエンジン制御装置
DE10141786B4 (de) 2001-08-25 2008-12-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Einrichtung zur Regelung des Schmieröldruckes einer Brennkraftmaschine
US7665352B2 (en) * 2007-02-06 2010-02-23 Gm Global Technology Operations, Inc. Adaptive oil pressure fault detection

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050118033A1 (en) * 2001-05-14 2005-06-02 Joma-Hydromechanic Gmbh Method for adjusting a volumetric flow-variable positive displacement pump in an internal combustion engine
US20120245819A1 (en) * 2011-03-25 2012-09-27 Continental Automotive Gmbh Method For Monitoring An Electromotively Driven Fuel Pump And Fuel Feed Unit Having A Fuel Pump

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ES2828965T3 (es) 2021-05-28
EP3070279A1 (fr) 2016-09-21

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