EP0107587B1 - Control device for a cooling fan - Google Patents

Control device for a cooling fan Download PDF

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Publication number
EP0107587B1
EP0107587B1 EP19830402020 EP83402020A EP0107587B1 EP 0107587 B1 EP0107587 B1 EP 0107587B1 EP 19830402020 EP19830402020 EP 19830402020 EP 83402020 A EP83402020 A EP 83402020A EP 0107587 B1 EP0107587 B1 EP 0107587B1
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EP
European Patent Office
Prior art keywords
pressure
cooling fluid
relay coil
predetermined value
fan
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.)
Expired
Application number
EP19830402020
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German (de)
French (fr)
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EP0107587A1 (en
Inventor
Christian Galopin
Joel Leseigneur
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Regie Nationale des Usines Renault
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Regie Nationale des Usines Renault
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Publication of EP0107587A1 publication Critical patent/EP0107587A1/en
Application granted granted Critical
Publication of EP0107587B1 publication Critical patent/EP0107587B1/en
Expired legal-status Critical Current

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    • 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
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
    • 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
    • F01P11/18—Indicating devices; Other safety devices concerning coolant pressure, coolant flow, or liquid-coolant level

Definitions

  • the invention relates to a device for controlling the operation of a motor-driven fan unit intended to cool an internal combustion engine, in particular during an engine stop after a strong heating.
  • French patent FR-A-1 553 341 describes a control device for a cooling fan driven by an electric motor, of the type comprising a relay coil which, when energized, serves to actuate said fan by a movable contact , and a temperature probe connected to said coil and to a general contactor, reacting to the temperature of the cooling fluid circulating in a radiator when the latter exceeds a predetermined value, to excite the relay coil.
  • a percolation phenomenon linked to the temperature under the hood causes vaporization of the fuel during stopping, which causes very long starting times of the engine by default of refueling of the engine.
  • the present invention aims to remedy this drawback by reducing the temperature of the gasoline in the carburetor as well as that of the air at the inlet of the latter.
  • a control device for a cooling fan driven by an electric motor of the type comprising a relay coil which, when energized, serves to actuate a fan by a movable contact, and a temperature probe. connected to this coil and to a general contactor, reacting to the temperature of the cooling fluid circulating in a radiator when the latter exceeds a predetermined value to excite the relay coil.
  • this control device comprises additional means sensitive to the pressure of the coolant which are connected on the one hand, to the positive terminal of a storage battery and on the other hand, to the coil of relay so as to excite it when the pressure of the coolant exceeds a first predetermined value and until this pressure reaches a second predetermined lower value.
  • these additional means consist of a pressure switch connected to the cooling fluid of a pipe placed between an expansion tank and the radiator, and adjusted to these first and second values predetermined pressure.
  • the technical characteristics of the invention define a very simple fan control device which makes it possible to avoid the phenomenon of percolation during an engine stop after a strong heating by reducing the temperature of the petrol in the carburetor and that of the air at the inlet of the latter by the actuation of the fan.
  • a fan control device 1 driven by an electric motor essentially comprises a relay coil 2 having a movable contact 4, a temperature probe 6 sensitive to the temperature of the cooling water circulating in the radiator and a pressure switch 10 sensitive to the pressure of the cooling water.
  • This pressure switch 10 is connected to the cooling water of a pipe 12 placed between an expansion tank 14 and the radiator 8; it is connected on the one hand, to the positive terminal of a storage battery 16 and on the other hand, to the relay coil 2.
  • the temperature probe 6 is connected on the one hand, to the coil 2 and on the other hand, to the general contactor 18.
  • This variation in the pressure of the cooling water is thus used according to the invention to control the motor-fan unit 1 via the pressure switch 10.
  • the water pressure continues to increase slightly to gradually decrease until a predetermined value P 3 at time t 3 when the pressure switch 10 ceases to energize the coil 2 and cuts off the supply to the motor-fan unit 1.
  • the operating time t 3 -t 2 of the motor-fan unit 1 controlled by the water pressure after the engine has stopped is therefore linked to the adjustable characteristics of the pressure switch 10 relating to the opening and closing of the circuit. on which it is placed.
  • the control device for cooling fans according to the invention thus makes it possible to avoid the phenomenon of percolation following a strong heating during an engine stop; it can also be used whenever it is necessary to control an accessory after stopping an engine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Description

L'invention se rapporte à un dispositif de commande du fonctionnement d'un groupe moto-ventilateur destiné à assurer le refroidissement d'un moteur à combustion interne, notamment lors d'un arrêt moteur après une forte chauffe.The invention relates to a device for controlling the operation of a motor-driven fan unit intended to cool an internal combustion engine, in particular during an engine stop after a strong heating.

Le brevet français FR-A-1 553 341 décrit un dispositif de commande pour un ventilateur de refroidissement entraîné par un moteur électrique, du type comprenant une bobine de relais qui, lorsqu'elle est excitée, sert à actionner ledit ventilateur par un contact mobile, et une sonde de température reliée à ladite bobine et à un contacteur général, réagissant à la température du fluide de refroidissement circulant dans un radiateur lorsque celle-ci dépasse une valeur prédéterminée, pour exciter la bobine de relais.French patent FR-A-1 553 341 describes a control device for a cooling fan driven by an electric motor, of the type comprising a relay coil which, when energized, serves to actuate said fan by a movable contact , and a temperature probe connected to said coil and to a general contactor, reacting to the temperature of the cooling fluid circulating in a radiator when the latter exceeds a predetermined value, to excite the relay coil.

Après une forte chauffe consécutive par exemple à un roulage sur autoroute ou en montagne, il s'avère souvent difficile de rèdémarrer un moteur chaud.After a strong warm-up following, for example, driving on a motorway or in the mountains, it is often difficult to restart a hot engine.

Un phénomène de percolation lié à la température sous capot provoque une vaporisation du carburant lors de l'arrêt, ce qui provoque des temps de départ très longs du moteur par défaut de réalimentation du moteur.A percolation phenomenon linked to the temperature under the hood causes vaporization of the fuel during stopping, which causes very long starting times of the engine by default of refueling of the engine.

La présente invention a pour but de remédier à cet inconvénient en diminuant la température de l'essence dans le carburateur ainsi que celle de l'air à l'entrée de ce dernier.The present invention aims to remedy this drawback by reducing the temperature of the gasoline in the carburetor as well as that of the air at the inlet of the latter.

A cet effet, elle présente un dispositif de commande pour un ventilateur de refroidissement entraîné par un moteur électrique du type comprenant une bobine de relais qui, lorsqu'elle est excitée, sert à actionner un ventilateur par un contact mobile, et une sonde de température reliée à cette bobine et à un contacteur général, réagissant à la température du fluide de refroidissement circulant dans un radiateur lorsque celle-ci dépasse une valeur prédéterminée pour exciter la bobine de relais.To this end, it has a control device for a cooling fan driven by an electric motor of the type comprising a relay coil which, when energized, serves to actuate a fan by a movable contact, and a temperature probe. connected to this coil and to a general contactor, reacting to the temperature of the cooling fluid circulating in a radiator when the latter exceeds a predetermined value to excite the relay coil.

Suivant l'invention, ce dispositif de commande comporte des moyens supplémentaires sensibles à la pression du liquide de refroidissement qui sont reliés d'une part, à la borne positive d'une batterie d'accumulateurs et d'autre part, à la bobine de relais de manière à exciter celle-ci quand la pression du liquide de refroidissement dépasse une première valeur prédéterminée et jusqu'à ce que cette pression atteigne une seconde valeur inférieure prédéterminée.According to the invention, this control device comprises additional means sensitive to the pressure of the coolant which are connected on the one hand, to the positive terminal of a storage battery and on the other hand, to the coil of relay so as to excite it when the pressure of the coolant exceeds a first predetermined value and until this pressure reaches a second predetermined lower value.

Suivant un mode particulier de réalisation de l'invention, ces moyens supplémentaires sont constitués par un mano-contact branché sur le fluide de refroidissement d'une conduite placée entre un vase d'expansion et le radiateur, et réglé à ces première et seconde valeurs prédéterminées de pression.According to a particular embodiment of the invention, these additional means consist of a pressure switch connected to the cooling fluid of a pipe placed between an expansion tank and the radiator, and adjusted to these first and second values predetermined pressure.

Les caractéristiques techniques de l'invention définissent un dispositif de commande de ventilateurs d'une grande simplicité qui permet d'éviter le phénomène de percolation au cours d'un arrêt du moteur après une forte chauffe en diminuant la température de l'essence dans le carburateur et celle de l'air à l'entrée de ce dernier par l'actionnement du ventilateur.The technical characteristics of the invention define a very simple fan control device which makes it possible to avoid the phenomenon of percolation during an engine stop after a strong heating by reducing the temperature of the petrol in the carburetor and that of the air at the inlet of the latter by the actuation of the fan.

L'invention sera mieux comprise à l'aide de la description qui suit, d'un mode de réalisation du dispositif de commande d'un groupe moto-ventilateur, donné à titre d'exemple non limitatif, en référence aux dessins annexés dans lesquels :

  • la figure 1 représente le schéma d'un dispositif de commande d'un groupe moto-ventilateur conforme à l'invention, et
  • la figure 2 représente une courbe de variation de la pression d'eau de refroidissement en fonction du temps avant et après l'arrêt du moteur.
The invention will be better understood with the aid of the description which follows, of an embodiment of the control device of a motor-fan unit, given by way of nonlimiting example, with reference to the appended drawings in which :
  • FIG. 1 represents the diagram of a device for controlling a motor-fan unit according to the invention, and
  • FIG. 2 represents a curve of variation of the cooling water pressure as a function of the time before and after the engine has stopped.

Comme cela est représenté à la figure 1, un dispositif de commande de ventilateur 1 entraîné par un moteur électrique conforme à l'invention, comprend essentiellement une bobine de relais 2 ayant un contact mobile 4, une sonde de température 6 sensible à la température de l'eau de refroidissement circulant dans le radiateur et un mano-contact 10 sensible à la pression de l'eau de refroidissement.As shown in FIG. 1, a fan control device 1 driven by an electric motor according to the invention essentially comprises a relay coil 2 having a movable contact 4, a temperature probe 6 sensitive to the temperature of the cooling water circulating in the radiator and a pressure switch 10 sensitive to the pressure of the cooling water.

Ce mano-contact 10 est branché sur l'eau de refroidissement d'une conduite 12 placée entre un vase d'expansion 14 et le radiateur 8 ; il est relié d'une part, à la borne positive d'une batterie d'accumulateurs 16 et d'autre part, à la bobine de relais 2. La sonde de température 6 est reliée d'une part, à la bobine 2 et d'autre part, au contacteur général 18.This pressure switch 10 is connected to the cooling water of a pipe 12 placed between an expansion tank 14 and the radiator 8; it is connected on the one hand, to the positive terminal of a storage battery 16 and on the other hand, to the relay coil 2. The temperature probe 6 is connected on the one hand, to the coil 2 and on the other hand, to the general contactor 18.

Le dispositif de commande précédemment décrit fonctionne de la manière suivante :

  • La pression d'eau dans le circuit de refroidissement se situe en roulage autour de 200 millibars. Comme cela est visible sur la figure 2, le groupe moto-ventilateur 1 est piloté de façon habituelle par la sonde de température 6 jusqu'au temps t, où le moteur est arrêté par coupure du contacteur 18. Pendant ce temps t" et à une température prédéterminée de l'eau du radiateur 8, la sonde 6 excite la bobine de relais 2 qui attire le contact 4 pour fermer le circuit d'alimentation du groupe moto-ventilateur 1.
The previously described control device operates as follows:
  • The water pressure in the cooling circuit is around 200 millibars when driving. As can be seen in FIG. 2, the motor-fan unit 1 is controlled in the usual way by the temperature probe 6 until time t, where the motor is stopped by switching off the contactor 18. During this time t "and at a predetermined temperature of the radiator water 8, the probe 6 excites the relay coil 2 which attracts the contact 4 to close the supply circuit of the motor-fan unit 1.

Or, lors d'un arrêt du moteur, la pression d'eau augmente instantanément, compte-tenu de l'absence de circulation d'eau et de l'inertie thermique du moteur. Cette pression peut alors atteindre des valeurs supérieures à 900 millibars.However, when the engine is stopped, the water pressure increases instantly, given the absence of water circulation and the thermal inertia of the engine. This pressure can then reach values greater than 900 millibars.

Cette variation de pression de l'eau de refroidissement est ainsi utilisée selon l'invention pour piloter le groupe moto-ventilateur 1 par l'intermédiaire du mano-contact 10.This variation in the pressure of the cooling water is thus used according to the invention to control the motor-fan unit 1 via the pressure switch 10.

Lorsque la pression d'eau atteint brusquement une valeur prédéterminée P2 au temps t2, le mano-contact 10 excite la bobine de relais 2 qui attire le contact 4 pour alimenter le groupe moto-ventilateur 1.When the water pressure suddenly reaches a predetermined value P 2 at time t 2 , the pressure switch 10 excites the relay coil 2 which attracts the contact 4 to supply the motor-fan unit 1.

La pression d'eau continue d'augmenter légèrement pour diminuer progressivement jusqu'à une valeur prédéterminée P3 au temps t3 où le mano-contact 10 cesse d'exciter la bobine 2 et coupe l'alimentation du groupe moto-ventilateur 1.The water pressure continues to increase slightly to gradually decrease until a predetermined value P 3 at time t 3 when the pressure switch 10 ceases to energize the coil 2 and cuts off the supply to the motor-fan unit 1.

Le temps de fonctionnement t3-t2 du groupe moto-ventilateur 1 piloté par la pression d'eau après l'arrêt du moteur est donc lié aux caractéristiques réglables du mano-contact 10 relatives à l'ouverture et à la fermeture du circuit électrique sur lequel il est disposé.The operating time t 3 -t 2 of the motor-fan unit 1 controlled by the water pressure after the engine has stopped is therefore linked to the adjustable characteristics of the pressure switch 10 relating to the opening and closing of the circuit. on which it is placed.

Le dispositif de commande pour ventilateurs de refroidissement conforme à l'invention permet ainsi d'éviter le phénomène de percolation consécutif à une forte chauffe lors d'un arrêt du moteur ; il peut être également utilisé chaque fois qu'il est nécessaire de piloter un accessoire après l'arrêt d'un moteur.The control device for cooling fans according to the invention thus makes it possible to avoid the phenomenon of percolation following a strong heating during an engine stop; it can also be used whenever it is necessary to control an accessory after stopping an engine.

Claims (2)

1. A control apparatus for a cooling fan (1) which is driven by an electric motor, of the type comprising a relay coil (2) which, when it is energised, serves to actuate said fan (1) by a movable contact (4), and a temperature detector (6) which is connected to said coil (2) and to a general switch (18) and which reacts to the temperature of the cooling fluid circulating in a radiator (8) when it exceeds a predetermined value, to energise the relay coil (2), characterised in that it comprises additional means which are responsive to the pressure of the cooling fluid and which are connected on the one hand to the positive terminal of an accumulator battery (16) and on the other hand to said relay coil (2) so as to energise same when the pressure of the cooling fluid exceeds a first predetermined value (P2) and until said pressure reaches a second lower predetermined value (P3).
2. A control apparatus according to claim 1 characterised in that said additional means are formed by a pressure switch (10) which is connected to the cooling fluid of a conduit (12) disposed between an expansion vessel (14) and said radiator (8), and which is set to said first and second predetermined pressure values.
EP19830402020 1982-10-19 1983-10-18 Control device for a cooling fan Expired EP0107587B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8217446 1982-10-19
FR8217446A FR2534640A1 (en) 1982-10-19 1982-10-19 CONTROL DEVICE FOR COOLING FANS

Publications (2)

Publication Number Publication Date
EP0107587A1 EP0107587A1 (en) 1984-05-02
EP0107587B1 true EP0107587B1 (en) 1986-04-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830402020 Expired EP0107587B1 (en) 1982-10-19 1983-10-18 Control device for a cooling fan

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EP (1) EP0107587B1 (en)
DE (1) DE3363086D1 (en)
ES (1) ES8405902A1 (en)
FR (1) FR2534640A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7332454B2 (en) * 2005-03-16 2008-02-19 Sud-Chemie Inc. Oxidation catalyst on a substrate utilized for the purification of exhaust gases

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2533156A (en) * 1944-10-31 1950-12-05 United Aircraft Corp Control of engine cylinder temperatures
GB1155225A (en) * 1967-01-28 1969-06-18 Lancia Automobili Motor-Driven Fan Unit for Internal Combustion Engines.
FR1553341A (en) * 1967-01-28 1969-01-10
US4312379A (en) * 1978-02-16 1982-01-26 Trw Inc. Pressure actuated multiway valve

Also Published As

Publication number Publication date
ES526429A0 (en) 1984-06-16
FR2534640B1 (en) 1984-12-14
DE3363086D1 (en) 1986-05-22
ES8405902A1 (en) 1984-06-16
FR2534640A1 (en) 1984-04-20
EP0107587A1 (en) 1984-05-02

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