[go: up one dir, main page]

EP1873370A1 - Cooling circuit of an automobile engine comprising a liquid circulation pipe for a temperature sensor - Google Patents

Cooling circuit of an automobile engine comprising a liquid circulation pipe for a temperature sensor Download PDF

Info

Publication number
EP1873370A1
EP1873370A1 EP07110442A EP07110442A EP1873370A1 EP 1873370 A1 EP1873370 A1 EP 1873370A1 EP 07110442 A EP07110442 A EP 07110442A EP 07110442 A EP07110442 A EP 07110442A EP 1873370 A1 EP1873370 A1 EP 1873370A1
Authority
EP
European Patent Office
Prior art keywords
engine
housing
temperature
liquid
cooling circuit
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.)
Withdrawn
Application number
EP07110442A
Other languages
German (de)
French (fr)
Inventor
Armel Le Lievre
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP1873370A1 publication Critical patent/EP1873370A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/029—Expansion reservoirs
    • 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
    • F01P2025/08—Temperature
    • F01P2025/32—Engine outcoming fluid temperature
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/08—Cabin heater
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops

Definitions

  • the technical field of the invention relates to the cooling circuits of a motor vehicle engine. More specifically, the invention relates to a cooling circuit, comprising a water outlet housing for receiving the heated coolant from the engine, provided with means for measuring a temperature of the liquid in the housing which is representative of the actual engine temperature, and comprising means, for example valves, for completely cutting the engine internal water flow in the starting phases. Indeed, when starting the engine, for it to reach as quickly as possible its optimum operating temperature, it is necessary to minimize heated thermal inertia. Once the engine warms up sufficiently, coolant circulation should be gradually restored.
  • the problem related to a measurement of the temperature of the liquid located in the water outlet housing and which is representative of the actual temperature of the engine, when the circulation of the coolant has been cut, has already been treated.
  • One solution is to keep open the pipe of the heater, which is the heating device of the passenger compartment of the vehicle, connecting said water outlet box to the inlet of the cooling circuit in the engine.
  • This solution has the disadvantage of generating significant heat exchange between the coolant and said pipe diameter and therefore high volume, said exchanges helping to delay the temperature rise of the engine.
  • Another solution is to correct the erroneous information given by the thermal probe, by means of an algorithm that takes the initial starting temperature and the operating conditions of the engine, in terms of speed and load, during the period of interruption of the cooling circulation.
  • a limitation presented by this solution is the lack of precision, and the difficulty of calibration of the different parameters to be taken into account.
  • the cooling circuits of a motor vehicle engine comprise a water outlet housing having means for conveying, permanently, in said housing, liquid from the engine, so as to that the temperature of the liquid in the housing around the probe is representative of that of the engine, by overcoming the aforementioned problems. In this way, when the coolant flow is interrupted, the measurement of the temperature of the liquid in the housing will reliably give the internal temperature of the engine.
  • the present invention relates to a cooling circuit of a motor vehicle engine, comprising a water outlet housing, adapted to receive the cooling liquid from the engine and having means for measuring the temperature of the liquid in the engine.
  • said housing and a water pump for circulating coolant in said circuit, characterized in that said circuit has a member for permanently conveying coolant from the engine to the housing, so that the temperature of the liquid in the housing is representative, in all circumstances, of the internal temperature of the engine.
  • the objective of the implementation of this body is to be able to assess, in a tangible way, the internal temperature of the engine by a simple measurement of the liquid in the housing, while preserving the performance of the cooling circuit.
  • the function of said member is particularly highlighted, when the circulation of the coolant in the circuit is interrupted.
  • the coolant stagnates in the circuit, causing a significant disparity of temperatures within the liquid, especially between the housing and the engine.
  • a reliable record of the engine temperature is an essential parameter, which will condition the operating sequences of the engine and its cooling circuit.
  • the organ is passive.
  • said member does not require any particular energy input to operate, avoiding the implantation of extra bulky parts, and significantly limiting the sources of malfunctions or failures.
  • the member is constituted by a branch pipe, having a small diameter and connecting the housing to the input of the circuit located upstream of the engine.
  • the tubing has a low thermal inertia and contributes to creating a closed circulation of liquid, comprising the housing, said bypass tubing and the part of the cooling circuit in contact with the engine and which opens on said housing, said tubing thus making it possible to draw liquid in contact with the motor to transport it in the housing.
  • Said tubing being devoid of closure means, will ensure a permanent flow of liquid between the housing and the engine.
  • the diameter of the tubing is less than 5 millimeters.
  • the diameter of the tubing is 4 mm.
  • the small diameter of the tubing is justified by the fact that it is necessary to minimize the thermal inertia so as not to cause losses that would delay the rise in temperature of the engine.
  • the pipe connects the housing to the inlet of the water pump, said pump being located upstream of the motor with respect to the direction of flow of the liquid.
  • the tubing is made of plastic or rubber
  • the means for measuring the temperature in the housing consist of a temperature probe.
  • the temperature sensor is placed in the housing near the inlet of the tubing. In this way, the temperature sensor will measure the temperature of the portion of the liquid circulated in the casing by means of the tubing.
  • the cooling circuit comprises a pipe for supplying liquid to a heater, said pipe and said pipe being connected in parallel and opening at the inlet of the pump.
  • the cooling circuits according to the invention have the advantage of being efficient and of having precise operation, insofar as they implement means making it possible to measure, at the level of the water outlet box, the temperature actual internal engine. They also have a character of great reliability because the body for introducing a permanent flow of very low flow liquid is passive and therefore it may not malfunction or break down.
  • FIG. 1 is a general diagram of a cooling circuit according to the invention.
  • a circuit 1 for cooling a motor vehicle engine 2 according to the invention comprises a water outlet housing 3 provided with a temperature sensor 4 and a thermostat 5, said housing 3 comprising an outlet main pipe 6 for transporting water to a radiator 7 whose function is to cool said water, the cooled water being then conveyed by means of another pipe 9 to the inlet of a water pump 8 located upstream of the engine 2.
  • Said pump 8 helps to circulate the cooled water in the engine 2, and the water thus heated by the engine 2 is then recovered in the housing 3.
  • the cooling liquid is constituted by water.
  • the housing 3 comprises a first secondary water outlet pipe 10 intended to supply water to a heater 11 whose function is to create heating in the passenger compartment of the motor vehicle, the water recovered at the outlet of said heater 11 being conveyed towards the pump inlet 8 for
  • the circulation of water in said first secondary duct 10 is controlled by means of a solenoid valve 12 placed between the casing 3 and the heater 11.
  • the casing 3 has a second secondary outlet pipe 13 which connects directly to the pipe 9 connecting the radiator 7 to the inlet of the pump 8, constituting a bypass portion bypassing said radiator 7.
  • the flow of water in said secondary pipe 13 is controlled by means of a proportional solenoid valve 14 placed between the housing 3 and the inlet of the pump 8.
  • This bypass portion 13 makes it possible to directly send heated water from the engine 2 to the upstream part of the circuit 1 of cooling positioned before said engine 2, through the housing 3.
  • the supply of said circuit 1 in heated water is particularly sought during the phase of starting the engine 2, where it is undesirable to cool said motor 2 too quickly.
  • a third secondary outlet pipe 15 passes from the casing 3 and connects a degassing box 16 to eliminate bubbles present in the water of said casing 3, the water recovered at the outlet of said box 16 being reinjected into the pipe 9 connecting the radiator 7 to the pump 8.
  • the circulation of water in said third secondary circulation is regulated by means of a solenoid valve 17.
  • a secondary inlet duct 19 opens into the casing 3 from a water / oil exchanger placed at the outlet of the engine 2, the exchanger 20 making it possible to lower the temperature of the oil by recovering the oil. part of the water coming out of the engine 2.
  • a branch pipe 18 of a diameter of 4 mm connects the part of the housing 3 in which the temperature probe 4 is implanted, to the inlet of the pump 8, way to established r a small flow of water in said housing 3, close to said probe 4.
  • Said tubing 18 having no means of closure remains permanently open and thus ensures, in particular, this low circulation of water when the cooling circuit 1 has been switched off. In this way, the temperature of the water measured in the housing 3, close to the probe 4, will reflect the internal temperature of the engine 2 and this, in all possible configurations of said circuit 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The circuit (1) has a passive connection tube (18) that permits to guide a coolant, in a permanent manner, coming from an engine (2) of a motor vehicle towards a case (3) such that temperature of liquid in the case represents an inner temperature of the engine. The tube has a low diameter and forms a loop for circulation of the coolant between the case and a circuit inlet that is placed at upstream of the engine. The tube connects the case to another inlet of a water pump (8).

Description

Le domaine technique de l'invention concerne les circuits de refroidissement d'un moteur de véhicule automobile. Plus spécifiquement, l'invention se rapporte à un circuit de refroidissement, comprenant un boîtier de sortie d'eau destiné à recevoir le liquide de refroidissement réchauffé en provenance du moteur, doté de moyens permettant de mesurer une température du liquide situé dans le boîtier qui soit représentative de la température réelle du moteur, et comportant des moyens, par exemple des vannes, permettant de couper complètement le débit d'eau interne moteur dans les phases de démarrage. En effet, au démarrage du moteur, pour que celui-ci atteigne le plus rapidement possible sa température optimale de fonctionnement, il est nécessaire de minimiser les inerties thermique réchauffées. Une fois que le moteur s'est suffisamment réchauffé, la circulation du liquide de refroidissement doit être progressivement rétablie. Pendant cette phase il est indispensable de connaître la température réelle du moteur, d'une part, pour rétablir la circulation du liquide lorsque le seuil optimal est atteint, et, d'autre part, pour commander les stratégies de contrôle moteur qui sont fonction de sa température. Dans la mesure où la circulation de liquide est coupée, la température indiquée par les moyens de mesure de la température, n'est pas représentative de la température du moteur.The technical field of the invention relates to the cooling circuits of a motor vehicle engine. More specifically, the invention relates to a cooling circuit, comprising a water outlet housing for receiving the heated coolant from the engine, provided with means for measuring a temperature of the liquid in the housing which is representative of the actual engine temperature, and comprising means, for example valves, for completely cutting the engine internal water flow in the starting phases. Indeed, when starting the engine, for it to reach as quickly as possible its optimum operating temperature, it is necessary to minimize heated thermal inertia. Once the engine warms up sufficiently, coolant circulation should be gradually restored. During this phase it is essential to know the actual temperature of the engine, on the one hand, to restore the circulation of the liquid when the optimal threshold is reached, and, on the other hand, to control the engine control strategies that are a function of its temperature. Insofar as the circulation of liquid is cut off, the temperature indicated by the means for measuring the temperature is not representative of the engine temperature.

Le problème lié à une mesure de température du liquide situé dans le boîtier de sortie d'eau et qui soit représentative de la température réelle du moteur, lorsque la circulation du liquide de refroidissement a été coupée, a déjà été traité. Une solution consiste à maintenir ouverte la canalisation de l'aérotherme, qui constitue le dispositif de chauffage de l'habitacle du véhicule, reliant ledit boîtier de sortie d'eau à l'entrée du circuit de refroidissement dans le moteur. Cette solution présente l'inconvénient d'engendrer des échanges thermiques importants entre le liquide de refroidissement et ladite canalisation de diamètre et donc de volume élevé, lesdits échanges contribuant à retarder la montée en température du moteur. Une autre solution consiste à corriger l'information erronée donnée par la sonde thermique, au moyen d'un algorithme qui prend en compte la température initiale au démarrage et les conditions de fonctionnement du moteur, en termes de régime et de charge, pendant la période d'interruption de la circulation de refroidissement. Une limitation présentée par cette solution est le manque de précision, et la difficulté de calibration des différents paramètres à prendre en compte.The problem related to a measurement of the temperature of the liquid located in the water outlet housing and which is representative of the actual temperature of the engine, when the circulation of the coolant has been cut, has already been treated. One solution is to keep open the pipe of the heater, which is the heating device of the passenger compartment of the vehicle, connecting said water outlet box to the inlet of the cooling circuit in the engine. This solution has the disadvantage of generating significant heat exchange between the coolant and said pipe diameter and therefore high volume, said exchanges helping to delay the temperature rise of the engine. Another solution is to correct the erroneous information given by the thermal probe, by means of an algorithm that takes the initial starting temperature and the operating conditions of the engine, in terms of speed and load, during the period of interruption of the cooling circulation. A limitation presented by this solution is the lack of precision, and the difficulty of calibration of the different parameters to be taken into account.

Les circuits de refroidissement d'un moteur de véhicule automobile selon l'invention comprennent un boîtier de sortie d'eau possédant des moyens, permettant d'acheminer, de façon permanente, dans ledit boîtier, du liquide en provenance du moteur, de manière à ce que la température du liquide dans le boîtier autour de la sonde soit représentative de celle du moteur, en s'affranchissant des problèmes précités. De cette manière, lorsque la circulation de liquide de refroidissement est interrompue, la mesure de la température du liquide dans le boîtier donnera, de façon fiable, la température interne du moteur.The cooling circuits of a motor vehicle engine according to the invention comprise a water outlet housing having means for conveying, permanently, in said housing, liquid from the engine, so as to that the temperature of the liquid in the housing around the probe is representative of that of the engine, by overcoming the aforementioned problems. In this way, when the coolant flow is interrupted, the measurement of the temperature of the liquid in the housing will reliably give the internal temperature of the engine.

La présente invention a pour objet un circuit de refroidissement d'un moteur de véhicule automobile, comprenant un boîtier de sortie d'eau, apte à recevoir le liquide de refroidissement en provenance du moteur et possédant des moyens de mesure de la température du liquide dans ledit boîtier, et une pompe à eau assurant la circulation du liquide de refroidissement dans ledit circuit, caractérisé en ce que ledit circuit possède un organe permettant d'acheminer, de façon permanente, du liquide de refroidissement en provenance du moteur vers le boîtier, de manière à ce que la température du liquide dans le boîtier soit représentative, en toutes circonstances, de la température interne du moteur. L'objectif visé par la mise en oeuvre de cet organe est de pouvoir évaluer, de manière tangible, la température interne du moteur par une simple mesure du liquide situé dans le boîtier, tout en préservant les performances du circuit de refroidissement. La fonction dudit organe est particulièrement mise en valeur, lorsque la circulation du liquide de refroidissement dans le circuit est interrompue. En effet, pour cette configuration précise, le liquide de refroidissement stagne dans le circuit, engendrant une disparité importante des températures au sein du liquide, notamment entre le boîtier et le moteur. Un relevé fiable de la température du moteur constitue un paramètre essentiel, qui va conditionner les séquences de fonctionnement du moteur et de son circuit de refroidissement.The present invention relates to a cooling circuit of a motor vehicle engine, comprising a water outlet housing, adapted to receive the cooling liquid from the engine and having means for measuring the temperature of the liquid in the engine. said housing, and a water pump for circulating coolant in said circuit, characterized in that said circuit has a member for permanently conveying coolant from the engine to the housing, so that the temperature of the liquid in the housing is representative, in all circumstances, of the internal temperature of the engine. The objective of the implementation of this body is to be able to assess, in a tangible way, the internal temperature of the engine by a simple measurement of the liquid in the housing, while preserving the performance of the cooling circuit. The function of said member is particularly highlighted, when the circulation of the coolant in the circuit is interrupted. Indeed, for this precise configuration, the coolant stagnates in the circuit, causing a significant disparity of temperatures within the liquid, especially between the housing and the engine. A reliable record of the engine temperature is an essential parameter, which will condition the operating sequences of the engine and its cooling circuit.

Avantageusement, l'organe est passif. Autrement dit, ledit organe ne nécessite aucun apport énergétique particulier pour fonctionner, évitant l'implantation de pièces supplémentaires encombrantes, et limitant de façon significative, les sources de dysfonctionnements ou de pannes.Advantageously, the organ is passive. In other words, said member does not require any particular energy input to operate, avoiding the implantation of extra bulky parts, and significantly limiting the sources of malfunctions or failures.

De façon préférentielle, l'organe est constitué par une tubulure de dérivation, ayant un faible diamètre et reliant le boîtier à l'entrée du circuit située en amont du moteur. De cette manière, la tubulure a une faible inertie thermique et contribue à créer une circulation fermée de liquide, comprenant le boîtier, ladite tubulure de dérivation et la partie du circuit de refroidissement située au contact du moteur et qui débouche sur ledit boîtier, ladite tubulure permettant ainsi de prélever du liquide au contact du moteur pour le transporter dans le boîtier. Ladite tubulure étant dépourvue de moyens de fermeture, va assurer une circulation permanente de liquide entre le boîtier et le moteur.Preferably, the member is constituted by a branch pipe, having a small diameter and connecting the housing to the input of the circuit located upstream of the engine. In this way, the tubing has a low thermal inertia and contributes to creating a closed circulation of liquid, comprising the housing, said bypass tubing and the part of the cooling circuit in contact with the engine and which opens on said housing, said tubing thus making it possible to draw liquid in contact with the motor to transport it in the housing. Said tubing being devoid of closure means, will ensure a permanent flow of liquid between the housing and the engine.

De façon avantageuse, le diamètre de la tubulure est inférieur à 5 millimètres.Advantageously, the diameter of the tubing is less than 5 millimeters.

Selon un mode de réalisation préféré de l'invention, le diamètre de la tubulure est de 4 mm.
Le faible diamètre de la tubulure se justifie par le fait qu'il est nécessaire de minimiser les inerties thermiques afin de ne pas engendrer de pertes qui retarderaient la montée en température du moteur.According to a preferred embodiment of the invention, the diameter of the tubing is 4 mm.
The small diameter of the tubing is justified by the fact that it is necessary to minimize the thermal inertia so as not to cause losses that would delay the rise in temperature of the engine.

Préférentiellement, la tubulure relie le boîtier à l'entrée de la pompe à eau, ladite pompe étant située en amont du moteur par rapport au sens d'écoulement du liquide.Preferably, the pipe connects the housing to the inlet of the water pump, said pump being located upstream of the motor with respect to the direction of flow of the liquid.

Avantageusement, la tubulure est réalisée en matière plastique ou en caoutchoucAdvantageously, the tubing is made of plastic or rubber

De façon préférentielle, les moyens de mesure de la température dans le boîtier sont constitués par une sonde de température.Preferably, the means for measuring the temperature in the housing consist of a temperature probe.

De façon avantageuse, la sonde de température est placée dans le boîtier à proximité de l'entrée de la tubulure. De cette manière, la sonde de température va mesurer la température de la partie du liquide mise en légère circulation dans le boîtier au moyen de la tubulure.Advantageously, the temperature sensor is placed in the housing near the inlet of the tubing. In this way, the temperature sensor will measure the temperature of the portion of the liquid circulated in the casing by means of the tubing.

Selon un mode de réalisation préféré de l'invention, le circuit de refroidissement comprend une canalisation destinée à alimenter en liquide un aérotherme, ladite canalisation et ladite tubulure étant montées en parallèle et débouchant à l'entrée de la pompe.According to a preferred embodiment of the invention, the cooling circuit comprises a pipe for supplying liquid to a heater, said pipe and said pipe being connected in parallel and opening at the inlet of the pump.

Les circuits de refroidissement selon l'invention présentent l'avantage d'être performants et d'avoir un fonctionnement précis, dans la mesure où ils mettent en oeuvre des moyens permettant de mesurer, au niveau du boîtier de sortie d'eau, la température interne réelle du moteur. Ils présentent également un caractère de grande fiabilité, car l'organe permettant d'instaurer une circulation permanente de liquide de très faible débit, est passif et qu'il ne risque donc pas de mal fonctionner ou de tomber en panne.The cooling circuits according to the invention have the advantage of being efficient and of having precise operation, insofar as they implement means making it possible to measure, at the level of the water outlet box, the temperature actual internal engine. They also have a character of great reliability because the body for introducing a permanent flow of very low flow liquid is passive and therefore it may not malfunction or break down.

On donne ci-après une description détaillée d'un mode de réalisation préféré d'un circuit de refroidissement selon l'invention en se référant à la figure 1.The following is a detailed description of a preferred embodiment of a cooling circuit according to the invention with reference to FIG.

La figure 1 est un schéma général d'un circuit de refroidissement selon l'invention.
En se référant à la figure 1, un circuit 1 de refroidissement d'un moteur 2 de véhicule automobile selon l'invention, comprend un boîtier 3 de sortie d'eau muni d'une sonde 4 de température et d'un thermostat 5, ledit boîtier 3 comportant une canalisation principale 6 de sortie pour transporter l'eau vers un radiateur 7 dont la fonction est de refroidir ladite eau, l'eau ainsi refroidie étant ensuite acheminée au moyen d'une autre canalisation 9 vers l'entrée d'une pompe 8 à eau située en amont du moteur 2. Ladite pompe 8 contribue à faire circuler l'eau refroidie dans le moteur 2, et l'eau ainsi réchauffée par le moteur 2 est ensuite récupérée dans le boîtier 3. Pour ce mode particulier de réalisation de l'invention, le liquide de refroidissement est constitué par l'eau. Le boîtier 3 comporte une première canalisation 10 secondaire de sortie d'eau destinée à alimenter en eau un aérotherme 11 dont la fonction est de créer du chauffage dans l'habitacle du véhicule automobile, l'eau récupérée à la sortie dudit aérotherme 11 étant acheminée vers l'entrée de la pompe 8 pour être réinjectée dans le circuit de refroidissement 1 du moteur 2. La circulation d'eau dans ladite première canalisation 10 secondaire, est pilotée au moyen d'une électrovanne 12 placée entre le boîtier 3 et l'aérotherme 11. Le boîtier 3 possède une deuxième canalisation 13 secondaire de sortie qui vient se connecter directement sur la canalisation 9 reliant le radiateur 7 à l'entrée de la pompe 8, constituant une portion de dérivation court-circuitant ledit radiateur 7. La circulation d'eau dans ladite canalisation 13 secondaire est pilotée au moyen d'une électrovanne 14 proportionnelle, placée entre le boîtier 3 et l'entrée de la pompe 8. Cette portion 13 de dérivation permet d'envoyer directement de l'eau réchauffée en provenance du moteur 2 vers la partie amont du circuit 1 de refroidissement positionnée avant ledit moteur 2, en traversant le boîtier 3. L'alimentation dudit circuit 1 en eau réchauffée est particulièrement recherchée lors de la phase de démarrage du moteur 2, où il n'est pas souhaitable de refroidir trop vite ledit moteur 2. Une troisième canalisation 15 secondaire de sortie, part du boîtier 3 et relie une boîte 16 de dégazage pour éliminer les bulles présentes dans l'eau dudit boîtier 3, l'eau récupérée à la sortie de ladite boîte 16 étant réinjectée dans la canalisation 9 reliant le radiateur 7 à la pompe 8. La circulation de l'eau dans ladite troisième circulation 15 secondaire est régulée par l'intermédiaire d'une électrovanne 17. Une canalisation 19 secondaire d'entrée, débouche dans le boîtier 3 en provenance d'un échangeur 20 eau/huile placé en sortie de moteur 2, ledit échangeur 20 permettant d'abaisser la température de l'huile grâce à la récupération d'une partie de l'eau sortant du moteur 2. Enfin, une tubulure 18 de dérivation de 4 mm de diamètre, relie la partie du boîtier 3 où est implantée la sonde 4 de température, à l'entrée de la pompe 8, de façon à établir une petite circulation d'eau dans ledit boîtier 3, à proximité de ladite sonde 4. Ladite tubulure 18 ne disposant d'aucun moyen de fermeture, reste en permanence ouverte et permet donc d'assurer, en particulier, cette faible circulation d'eau lorsque le circuit de refroidissement 1 a été coupé. De cette manière, la température de l'eau mesurée dans le boîtier 3, à proximité de la sonde 4, va refléter la température interne du moteur 2 et ce, dans toutes les configurations possibles dudit circuit 1.Figure 1 is a general diagram of a cooling circuit according to the invention.
Referring to Figure 1, a circuit 1 for cooling a motor vehicle engine 2 according to the invention comprises a water outlet housing 3 provided with a temperature sensor 4 and a thermostat 5, said housing 3 comprising an outlet main pipe 6 for transporting water to a radiator 7 whose function is to cool said water, the cooled water being then conveyed by means of another pipe 9 to the inlet of a water pump 8 located upstream of the engine 2. Said pump 8 helps to circulate the cooled water in the engine 2, and the water thus heated by the engine 2 is then recovered in the housing 3. For this particular mode embodiment of the invention, the cooling liquid is constituted by water. The housing 3 comprises a first secondary water outlet pipe 10 intended to supply water to a heater 11 whose function is to create heating in the passenger compartment of the motor vehicle, the water recovered at the outlet of said heater 11 being conveyed towards the pump inlet 8 for The circulation of water in said first secondary duct 10 is controlled by means of a solenoid valve 12 placed between the casing 3 and the heater 11. The casing 3 has a second secondary outlet pipe 13 which connects directly to the pipe 9 connecting the radiator 7 to the inlet of the pump 8, constituting a bypass portion bypassing said radiator 7. The flow of water in said secondary pipe 13 is controlled by means of a proportional solenoid valve 14 placed between the housing 3 and the inlet of the pump 8. This bypass portion 13 makes it possible to directly send heated water from the engine 2 to the upstream part of the circuit 1 of cooling positioned before said engine 2, through the housing 3. The supply of said circuit 1 in heated water is particularly sought during the phase of starting the engine 2, where it is undesirable to cool said motor 2 too quickly. A third secondary outlet pipe 15 passes from the casing 3 and connects a degassing box 16 to eliminate bubbles present in the water of said casing 3, the water recovered at the outlet of said box 16 being reinjected into the pipe 9 connecting the radiator 7 to the pump 8. The circulation of water in said third secondary circulation is regulated by means of a solenoid valve 17. A secondary inlet duct 19 opens into the casing 3 from a water / oil exchanger placed at the outlet of the engine 2, the exchanger 20 making it possible to lower the temperature of the oil by recovering the oil. part of the water coming out of the engine 2. Finally, a branch pipe 18 of a diameter of 4 mm connects the part of the housing 3 in which the temperature probe 4 is implanted, to the inlet of the pump 8, way to established r a small flow of water in said housing 3, close to said probe 4. Said tubing 18 having no means of closure, remains permanently open and thus ensures, in particular, this low circulation of water when the cooling circuit 1 has been switched off. In this way, the temperature of the water measured in the housing 3, close to the probe 4, will reflect the internal temperature of the engine 2 and this, in all possible configurations of said circuit 1.

Claims (9)

Circuit (1) de refroidissement d'un moteur (2) de véhicule automobile, comprenant un boîtier (3) de sortie d'eau, apte à recevoir le liquide de refroidissement en provenance du moteur (2) et possédant des moyens (4) de mesure de la température du liquide dans ledit boîtier (3), et une pompe (8) à eau assurant la circulation du liquide de refroidissement dans ledit circuit (1), caractérisé en ce que ledit circuit (1) possède un organe (18) permettant d'acheminer, de façon permanente, du liquide de refroidissement en provenance du moteur (2) vers le boîtier (3), de manière à ce que la température du liquide dans le boîtier (3) soit représentative, en toutes circonstances, de la température interne du moteur (2).Circuit (1) for cooling a motor vehicle engine (2), comprising a water outlet housing (3) adapted to receive the cooling liquid from the engine (2) and having means (4) for measuring the temperature of the liquid in said housing (3), and a water pump (8) for circulating the cooling liquid in said circuit (1), characterized in that said circuit (1) has a body (18) ) for permanently conveying coolant from the engine (2) to the housing (3) so that the temperature of the liquid in the housing (3) is representative under all circumstances, the internal temperature of the engine (2). Circuit de refroidissement selon la revendication 2, caractérisé en ce que l'organe (18) est passif.Cooling circuit according to claim 2, characterized in that the member (18) is passive. Circuit de refroidissement selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que l'organe est constitué par une tubulure (18) de dérivation, ayant un faible diamètre et formant une boucle fermée de circulation de liquide entre le boîtier (3) et l'entrée du circuit (1) située en amont du moteur (2).Cooling circuit according to any one of claims 1 or 2, characterized in that the member is constituted by a branch pipe (18) having a small diameter and forming a closed loop of liquid circulation between the housing (3). ) and the input of the circuit (1) located upstream of the motor (2). Circuit de refroidissement selon la revendication 3, caractérisé en ce que la tubulure (18) a un diamètre inférieur à 5 millimètres.Cooling circuit according to claim 3, characterized in that the tubing (18) has a diameter of less than 5 millimeters. Circuit de refroidissement selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que la tubulure (18) relie le boîtier (3) à l'entrée de la pompe (8) à eau.Cooling circuit according to any one of claims 3 or 4, characterized in that the tubing (18) connects the housing (3) to the inlet of the pump (8) water. Circuit de refroidissement selon l'une quelconque des revendications 3 à 5, caractérisé en ce que la tubulure (18) est réalisée en matière plastique ou en caoutchouc.Cooling circuit according to any one of claims 3 to 5, characterized in that the tubing (18) is made of plastic or rubber. Circuit de refroidissement selon l'une quelconque des revendications 3 à 6, caractérisé en ce que les moyens (4) de mesure de la température dans le boîtier (3) sont constitués par une sonde de température.Cooling circuit according to any one of claims 3 to 6, characterized in that the means (4) for measuring the temperature in the housing (3) consist of a temperature sensor. Circuit de refroidissement selon la revendication 7, caractérisé en ce que la sonde (4) de température est placée dans le boîtier (3) à proximité de l'entrée de la tubulure (18).Cooling circuit according to Claim 7, characterized in that the temperature sensor (4) is placed in the housing (3) near the inlet of the pipe (18). Circuit de refroidissement selon la revendication 1, caractérisé en ce que ledit circuit comprend une canalisation (10) destinée à alimenter en liquide un aérotherme (11), ladite canalisation (10) et ladite tubulure (18) étant montées en parallèle et débouchant à l'entrée de la pompe (8).Cooling circuit according to claim 1, characterized in that said circuit comprises a duct (10) intended to supply liquid to a heater (11), said duct (10) and said duct (18) being connected in parallel and opening at the same time. pump inlet (8).
EP07110442A 2006-06-29 2007-06-18 Cooling circuit of an automobile engine comprising a liquid circulation pipe for a temperature sensor Withdrawn EP1873370A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0652714A FR2903143B1 (en) 2006-06-29 2006-06-29 COOLING SYSTEM OF A MOTOR VEHICLE ENGINE COMPRISING A LIQUID CIRCULATION TUBE FOR A TEMPERATURE PROBE

Publications (1)

Publication Number Publication Date
EP1873370A1 true EP1873370A1 (en) 2008-01-02

Family

ID=37834225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07110442A Withdrawn EP1873370A1 (en) 2006-06-29 2007-06-18 Cooling circuit of an automobile engine comprising a liquid circulation pipe for a temperature sensor

Country Status (2)

Country Link
EP (1) EP1873370A1 (en)
FR (1) FR2903143B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2090763A1 (en) * 2008-02-14 2009-08-19 Peugeot Citroen Automobiles SA Engine cooling circuit
FR2929330A1 (en) * 2008-04-01 2009-10-02 Peugeot Citroen Automobiles Sa ENGINE COOLING CIRCUIT.
FR2934318A1 (en) * 2008-07-28 2010-01-29 Peugeot Citroen Automobiles Sa Engine i.e. internal combustion engine, cooling device for vehicle, has actuator for piloting opening and closing of first and second outlets, and closing assembly including check valves for closing second outlet and piloted by actuator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2929646B1 (en) 2008-04-08 2010-06-04 Peugeot Citroen Automobiles Sa INTERNAL COMBUSTION ENGINE WATER OUTPUT HOUSING
FR2960601B1 (en) * 2010-06-01 2013-01-11 Peugeot Citroen Automobiles Sa MODULE MOUNTABLE ON COMBUSTION ENGINE

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2347038A1 (en) * 1973-09-19 1975-03-27 Robionek Hans Joachim I.C. vehicle engine cooling system - has temp. sensors filled with medium charging vol. as temp. changes
FR2440470A1 (en) * 1978-10-31 1980-05-30 Alfa Romeo Spa COOLING CIRCUIT FOR INTERNAL COMBUSTION ENGINES CAPABLE OF IMPROVING OPERATION AFTER COLD START
EP0301959A1 (en) 1987-07-31 1989-02-01 Automobiles Peugeot Liquid cooling outlet casing for a diesel engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2347038A1 (en) * 1973-09-19 1975-03-27 Robionek Hans Joachim I.C. vehicle engine cooling system - has temp. sensors filled with medium charging vol. as temp. changes
FR2440470A1 (en) * 1978-10-31 1980-05-30 Alfa Romeo Spa COOLING CIRCUIT FOR INTERNAL COMBUSTION ENGINES CAPABLE OF IMPROVING OPERATION AFTER COLD START
EP0301959A1 (en) 1987-07-31 1989-02-01 Automobiles Peugeot Liquid cooling outlet casing for a diesel engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2090763A1 (en) * 2008-02-14 2009-08-19 Peugeot Citroen Automobiles SA Engine cooling circuit
FR2927660A1 (en) * 2008-02-14 2009-08-21 Peugeot Citroen Automobiles Sa ENGINE COOLING CIRCUIT
FR2929330A1 (en) * 2008-04-01 2009-10-02 Peugeot Citroen Automobiles Sa ENGINE COOLING CIRCUIT.
EP2112347A1 (en) * 2008-04-01 2009-10-28 Peugeot Citroen Automobiles S.A. Engine cooling circuit
FR2934318A1 (en) * 2008-07-28 2010-01-29 Peugeot Citroen Automobiles Sa Engine i.e. internal combustion engine, cooling device for vehicle, has actuator for piloting opening and closing of first and second outlets, and closing assembly including check valves for closing second outlet and piloted by actuator

Also Published As

Publication number Publication date
FR2903143B1 (en) 2008-09-26
FR2903143A1 (en) 2008-01-04

Similar Documents

Publication Publication Date Title
EP3080523B1 (en) Electrical device for the thermal conditioning of fluid for a motor vehicle, and associated heating and/or air-conditioning appliance
EP2112347B1 (en) Engine cooling circuit
EP2334504A1 (en) Automobile with electric motor comprising a cooling circuit for the electronic power circuit connected to a heating radiator of the passenger compartment
EP1873370A1 (en) Cooling circuit of an automobile engine comprising a liquid circulation pipe for a temperature sensor
EP3577395A1 (en) Electric heating device, corresponding heating circuit and method for managing the temperature
EP2748022B1 (en) Device for controlling the flow of a coolant, and circuit including such a device
EP3555457B1 (en) Duct for the passage of liquid coolant for an internal combustion engine of a motor vehicle
EP2187016A1 (en) Engine cooling circuit
EP2795714B1 (en) Heat-storage device for heating a vehicle battery
FR2863661A1 (en) Internal combustion engine`s cooling system control method for motor vehicle, involves controlling control valve corresponding to two control modes of cooling of engine without and by heating of passenger compartment
FR3014370A1 (en) CIRCUIT FOR THE THERMAL CONDITIONING OF A CAR AND / OR AN ORGAN OF A MOTOR VEHICLE
FR2932845A1 (en) Heat engine cooling method for vehicle, involves delivering part of heat-transfer liquid to heat-transfer liquid inlet from cooling cavities of cylinder head with respect to temperature of heat-transfer liquid so as to exit pump
EP2090763B1 (en) Engine cooling circuit
EP2870015B1 (en) Vehicle having a rear motor and a improved coupling system
FR3107209A1 (en) DEVICE FOR THERMAL MANAGEMENT OF THE COMBUSTION ENGINE AND THE INTERIOR OF MOTOR VEHICLES AND PROCESS FOR IMPLEMENTING THE SAID DEVICE
FR3051873A1 (en) POWER UNIT OF A VEHICLE
FR2658332A1 (en) DEVICE FOR TEMPERATURE CONTROL OF A TOOL OR REACTOR USING A HEAT PUMP FLUID.
FR2996595A1 (en) Arrangement for car, has valve varying between closed position in which valve prevents transfer of fluid to engine and open position in which fluid is transferred towards input of internal cooling circuit of engine through return duct
FR2949508A1 (en) Internal combustion engine for motor vehicle, has heating unit heating rod, where application of electric drive on heating unit provokes connection of low temperature circuit with high temperature circuit and casing
EP2187015B1 (en) Engine cooling circuit
FR2639009A1 (en) Heating device for a motor vehicle including a heat generator
FR2875885A1 (en) COOLING DEVICE FOR AUTOMATIC GEARBOX OF MOTOR VEHICLE AND ASSOCIATED METHOD
FR3040739B1 (en) COOLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR A MOTOR VEHICLE
FR3141280A1 (en) Circuit breaker type electrical protection device positionable on a continuous electrical cable
FR3066151A1 (en) METHOD FOR CONTROLLING A TEMPERATURE OF GEARBOX OIL BY SQUADING ON A RADIATOR DRIVE

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17P Request for examination filed

Effective date: 20080527

17Q First examination report despatched

Effective date: 20080626

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110712