EP3293380B1 - Moteur à combustion interne comprenant un circuit de refroidissement et un véhicule terrestre comprenant ce moteur à combustion interne - Google Patents

Moteur à combustion interne comprenant un circuit de refroidissement et un véhicule terrestre comprenant ce moteur à combustion interne Download PDF

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Publication number
EP3293380B1
EP3293380B1 EP17190664.7A EP17190664A EP3293380B1 EP 3293380 B1 EP3293380 B1 EP 3293380B1 EP 17190664 A EP17190664 A EP 17190664A EP 3293380 B1 EP3293380 B1 EP 3293380B1
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EP
European Patent Office
Prior art keywords
coolant
combustion engine
internal combustion
sensor
engine
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.)
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EP17190664.7A
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German (de)
English (en)
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EP3293380A1 (fr
Inventor
Manuel Varwick
Christian Krug
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.)
Iveco Magirus AG
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Iveco Magirus AG
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Publication date
Priority claimed from IT102016000091701A external-priority patent/IT201600091701A1/it
Priority claimed from IT102016000091703A external-priority patent/IT201600091703A1/it
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Publication of EP3293380A1 publication Critical patent/EP3293380A1/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
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P2003/001—Cooling liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/80—Concentration anti-freeze

Definitions

  • the present invention relates to an internal combustion engine comprising a coolant circuit and land vehicle, preferably industrial vehicles, comprising said internal combustion engine.
  • the quality of coolant of the internal combustion engines is important for save the integrity of the combustion engine itself.
  • glycol is mixed to water to provide freeze protection.
  • the addition of glycol slightly reduces the heat transfer of the water, but in most climates and applications, freeze protection is critical.
  • coolants degrade over time as the ethylene glycol breaks down into primarily glycolic and formic acids. Degradation occurs more quickly in engines operating at higher temperatures or those that allow more air into cooling systems.
  • US2005034510 A1 discloses a Coolant Service Monitoring System (CSMS) utilizing sensors to monitor the pH of the coolant mixture, as well as the DC voltage of the coolant with respect to ground. By monitoring the pH and voltage, the sensors can notify the operator when unsafe coolant conditions are present.
  • CSMS Coolant Service Monitoring System
  • the main object of the present invention is to customize the time interval for replacing coolant for each internal combustion engine.
  • the coolant is tested on an annual basis if it is intended to operate the system for several years between coolant changes, and particularly where the coolant is used in severe applications.
  • a PH sensor PHS is coupled with the coolant circuit C in order to monitor the coolant acidity constantly, namely according to relatively short time intervals.
  • each measurement does not requires the depressurization of the coolant circuit in order to sample the coolant.
  • an internal combustion engine E preferably a Diesel or a spark engine is provided with a coolant circuit where coolant is recirculated by a pump P in order to pass through an external radiator R.
  • the coolant circuit comprises a PH sensor arranged in such a way to sense its acidity.
  • the PH sensor is operationally connected to elaborating means ECU suitable to manage an electric signal produced by said PH sensor and to calculate a PH of coolant and to signal a deterioration of the coolant requiring the replacement thereof with fresh one on the basis of said PH.
  • said signaling is carried out when such electric signal indicates that PH is under a predetermined threshold, for example, 7.
  • the coolant circuit comprises an expansion tank ET, see figures 1 and 2 , and said PH sensor PHS is coupled with said expansion tank so as to have at least its own sensing portion immersed into the coolant.
  • said elaborating means ECU are arranged to calculate a PH value of the coolant when the coolant temperature is under a predetermined upper threshold and preferably within a predetermined temperature range defined by said upper threshold and a lower threshold.
  • a temperature sensor TS is already associated to the cooling circuit for different purposes e.g. to adjust the fuel injection.
  • the temperature sensed by said temperature sensor is also used in order to enable the PH calculation.
  • the pH measurement is carried out only when the coolant temperature falls within a predetermined temperature interval.
  • said elaborating means ECU are arranged to measure a PH value of the coolant when the combustion engine is switched off, preferably the ignition is off and the combustion engine is stationary.
  • the internal combustion engines are provided with an engine speed sensor SS associated to the crankshaft CS of combustion engine.
  • the speed sensed by said speed sensor SS is also used in order to enable the PH calculation.
  • the combustion engine When a land industrial vehicle implements said internal combustion engine, the combustion engine is considered to be stationary when the vehicle, as a whole, is stationary, thus also the ABS sensor can be used in order to determine if the vehicle is stationary.
  • the coolant replacement is customized according to the usage of the engine and, in general, the land vehicle comprising the internal combustion engine. In this way, the maintenance of the combustion engine is more adherent to the real conditions of the coolant.
  • the engine start in inhibited, because it indicates a strong contamination of the coolant that could lead to the irreversible damage of the internal combustion engine.
  • the described 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.
  • the PH sensor senses the PH of the coolant and elaborating means signal, for example through a lamp in the vehicle instrument panel, a deterioration of the coolant requiring its replacement with fresh one.
  • the calculation of the PH, or equivalently the signaling, can be subordinated to other conditions such as the coolant temperature, the operating condition of the internal combustion engine and its stationary as described above.
  • the elaborating means are also suitable to construe a linear regression on the PH values sensed/calculated in order to estimate the remaining time or range before the coolant deterioration and to show, through a display, for example in the instrument pane, such time (in terms of days or months) or range (in terms of mileage) remaining before said deterioration.
  • said elaborating means can coincide with the engine control unit (ECU) or other electronic control units usually implemented to monitor and control the combustion engine and preferably also its After Treatment System (ATS).
  • ECU engine control unit
  • ATS After Treatment System

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Claims (15)

  1. Moteur à combustion interne (E) comprenant un circuit de liquide de refroidissement (C) dans lequel un liquide de refroidissement est recirculé à travers une pompe (P) et dans lequel un capteur de pH (PHS) est agencé de manière à détecter le pH de celui-ci et à signaler une détérioration du liquide de refroidissement nécessitant un remplacement de celui-ci par un liquide de refroidissement neuf sur la base dudit pH détecté, le moteur à combustion interne étant caractérisé en ce que ledit capteur de pH est relié fonctionnellement à une unité de commande, caractérisé en ce que l'unité de commande est agencée pour gérer un signal électrique produit par ledit capteur de pH et pour calculer ladite valeur de pH du liquide de refroidissement, et configurée pour effectuer ledit calcul uniquement lorsque la température de liquide de refroidissement est inférieure à un seuil supérieur prédéterminé.
  2. Moteur selon la revendication 1, dans lequel ladite signalisation est effectuée lorsqu'un tel signal électrique indique qu'un pH est inférieur à un seuil prédéterminé.
  3. Moteur selon la revendication 1 ou 2, dans lequel ledit capteur de pH est relié fonctionnellement à une unité de commande agencée pour calculer ladite valeur de pH du liquide de refroidissement et configurée pour effectuer ledit calcul lorsque le moteur à combustion est arrêté.
  4. Moteur selon l'une quelconque des revendications 1 à 3, dans lequel ledit capteur de pH est relié fonctionnellement à une unité de commande agencée pour calculer ladite valeur de pH du liquide de refroidissement et configurée pour effectuer ledit calcul lorsque le contact est coupé et le moteur est immobile.
  5. Moteur selon la revendication 1, comprenant en outre un capteur de température (TS) associé audit circuit de liquide de refroidissement et/ou un capteur de vitesse (SS) associé à un vilebrequin (CS) dudit moteur à combustion interne.
  6. Moteur selon l'une quelconque des revendications 1 à 5, dans lequel ledit circuit de liquide de refroidissement comprend un vase d'expansion (ET) et dans lequel ledit capteur de pH (PHS) est couplé audit vase d'expansion de manière à avoir au moins sa propre partie de détection immergée dans le liquide de refroidissement.
  7. Moteur selon l'une quelconque des revendications 1 à 6, dans lequel ladite unité de commande est programmée pour interdire au moteur de démarrer lorsque ladite valeur de pH du liquide de refroidissement est inférieure à une valeur prédéterminée.
  8. Moteur selon l'une quelconque des revendications 1 à 7, dans lequel ladite unité de commande est une unité de commande de moteur (ECU).
  9. Méthode pour déterminer un remplacement de liquide de refroidissement dans un moteur à combustion interne selon l'une quelconque des revendications 1 à 8, caractérisée en ce qu'elle comprend l'étape de la gestion d'un signal électrique produit par ledit capteur de pH et du calcul d'un pH dudit liquide de refroidissement uniquement lorsque la température de liquide de refroidissement est inférieure à un seuil prédéterminé ou est à l'intérieur d'une plage de températures.
  10. Méthode selon la revendication 9, comprenant ladite étape du calcul d'un pH dudit liquide de refroidissement uniquement lorsque la température de liquide de refroidissement est inférieure à un seuil prédéterminé ou est à l'intérieur d'une plage de températures et lorsque le moteur à combustion interne est arrêté.
  11. Méthode selon la revendication 9 ou 10, comprenant ladite étape du calcul d'un pH dudit liquide de refroidissement uniquement lorsque la température de liquide de refroidissement est inférieure à un seuil prédéterminé ou est à l'intérieur d'une plage de températures et lorsque le contact est coupé et/ou lorsque le moteur à combustion interne est immobile.
  12. Méthode selon l'une quelconque des revendications 9 à 11, comprenant en outre l'étape de l'acquisition de valeurs de pH et d'interprétation d'une régression linéaire sur lesdites valeurs de pH afin d'estimer un temps restant ou une plage restante avant la détérioration de liquide de refroidissement et une étape conséquente de présentation sur un affichage d'un tel temps restant ou d'une telle plage restante avant ladite détérioration.
  13. Véhicule (LV) comprenant le moteur à combustion interne (E) selon l'une quelconque des revendications 1 à 8.
  14. Programme d'ordinateur comprenant un moyen de code de programme d'ordinateur apte à réaliser toutes les étapes des revendications 9 à 12 lorsque ledit programme est exécuté sur un ordinateur.
  15. Support lisible par ordinateur ayant un programme enregistré sur celui-ci, ledit support lisible par ordinateur comprenant un moyen de code de programme d'ordinateur apte à réaliser toutes les étapes des revendications 9 à 12, lorsque ledit programme est exécuté sur un ordinateur.
EP17190664.7A 2016-09-12 2017-09-12 Moteur à combustion interne comprenant un circuit de refroidissement et un véhicule terrestre comprenant ce moteur à combustion interne Active EP3293380B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000091701A IT201600091701A1 (it) 2016-09-12 2016-09-12 Motore a combustione interna comprendente un circuito di refrigerazione e veicolo terrestre comprendente detto motore a combustione interna
IT102016000091703A IT201600091703A1 (it) 2016-09-12 2016-09-12 Motore a combustione interna comprendente un circuito di refrigerazione e veicolo terrestre comprendente detto motore a combustione interna

Publications (2)

Publication Number Publication Date
EP3293380A1 EP3293380A1 (fr) 2018-03-14
EP3293380B1 true EP3293380B1 (fr) 2021-11-03

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EP17190664.7A Active EP3293380B1 (fr) 2016-09-12 2017-09-12 Moteur à combustion interne comprenant un circuit de refroidissement et un véhicule terrestre comprenant ce moteur à combustion interne

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EP (1) EP3293380B1 (fr)
ES (1) ES2904587T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3119866A1 (fr) * 2021-02-16 2022-08-19 Valeo Systemes Thermiques Boucle de refroidissement, notamment pour un véhicule automobile, et capteur embarqué sur ladite boucle
WO2023223074A1 (fr) * 2022-05-17 2023-11-23 Volvo Truck Corporation Surveillance active de liquide de refroidissement et atténuation de fuite dans des systèmes de refroidissement de véhicule

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5094757A (en) * 1990-05-24 1992-03-10 Radiator Robot, Inc. Radiator cooling system cleaner/refiner
DE10310051A1 (de) * 2002-03-08 2003-10-30 Denso Corp Vorrichtung und Verfahren zum Erfassen der Ölverschlechterung
US20050034510A1 (en) * 2003-08-12 2005-02-17 Han Charlie Bun Coolant service monitoring system
US20070235458A1 (en) * 2006-04-10 2007-10-11 Mann & Hummel Gmbh Modular liquid reservoir
US9275500B2 (en) * 2013-04-04 2016-03-01 Hyundai Motor Company System and method for detecting the condition of a coolant in a vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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ES2904587T3 (es) 2022-04-05
EP3293380A1 (fr) 2018-03-14

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