FR2489415A1 - Exhaust gas IC engine heating system - uses heat exchanger to transfer exhaust heat to engine cooling water when engine is below operating temp. - Google Patents

Exhaust gas IC engine heating system - uses heat exchanger to transfer exhaust heat to engine cooling water when engine is below operating temp. Download PDF

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Publication number
FR2489415A1
FR2489415A1 FR8018560A FR8018560A FR2489415A1 FR 2489415 A1 FR2489415 A1 FR 2489415A1 FR 8018560 A FR8018560 A FR 8018560A FR 8018560 A FR8018560 A FR 8018560A FR 2489415 A1 FR2489415 A1 FR 2489415A1
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France
Prior art keywords
engine
exhaust gases
exhaust
heat exchanger
cooling water
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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.)
Granted
Application number
FR8018560A
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French (fr)
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FR2489415B1 (en
Inventor
Francois Gastinne
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Automobiles Peugeot SA
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Automobiles Peugeot SA
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Publication date
Application filed by Automobiles Peugeot SA filed Critical Automobiles Peugeot SA
Priority to FR8018560A priority Critical patent/FR2489415A1/en
Publication of FR2489415A1 publication Critical patent/FR2489415A1/en
Application granted granted Critical
Publication of FR2489415B1 publication Critical patent/FR2489415B1/fr
Granted legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
    • F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
    • F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
    • 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
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • 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
    • 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
    • F01P2037/00—Controlling
    • F01P2037/02—Controlling starting

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

The internal combustion engine is quickly brought to correct operating temperature by using exhaust gases to heat the engine cooling water while the engine is below its correct operating temperature. A tubular heat exchanger is built into the lower part of the engine cooling water radiator. The exhaust gases from the engine pass through a bidirectional valve, whose position is controlled by a solenoid actuated by a water temperature sensor at the engine cooling water outlet. In one position of the valve the exhaust gases pass to the heat exchanger before exhausting to atmosphere, and in the other position the exhaust gases exhaust direct to atmosphere. The engine thermostat has dual valves allowing water to flow to the cooling radiator when the engine is hot, and to the heater when the engine is cold. The system thus decreases the time for the engine to reach its normal operating temp.

Description

L'invention concerne un dispositif permettant d'accélerer le réchauffage du liquide circulant dans un circuit de refroidissement d'un moteur à explosions, en vue d'amener le plus rapidement possible le moteur à sa température correcte de fonctionnement. The invention relates to a device for accelerating the heating of the liquid circulating in a cooling circuit of an explosion engine, with a view to bringing the engine as quickly as possible to its correct operating temperature.

On sait que la consommation dgun moteur est sérieusement accrue tant qu'il n'a pas atteint une température suffisante. C'est pourquoi on a déjà proposé d'accélérer la montée en température du moteur en guidant le liquide de refroidissement dans un échangeur chauffé par les gaz d'échappement. We know that the consumption of an engine is seriously increased until it has reached a sufficient temperature. This is why it has already been proposed to accelerate the temperature rise of the engine by guiding the coolant in an exchanger heated by the exhaust gases.

Un inconvénient de cette solution vient du fait que le liquide contenu dans l'échangeur peut être porté à une température anormalement élevée et perturber fortement le circuit de refroidissement par suite des liaisons inevitables entre l'échangeur de chaleur et le radiateur. A drawback of this solution comes from the fact that the liquid contained in the exchanger can be brought to an abnormally high temperature and strongly disturb the cooling circuit as a result of the inevitable connections between the heat exchanger and the radiator.

L'invention a pour but de remédier à cet inconvénient gracie à une disposition qui a pour autre avantage de ne modifier que très peu le circuit de refroidissement habituel du moteur. The object of the invention is to remedy this drawback thanks to an arrangement which has the other advantage of modifying very little the usual cooling circuit of the engine.

L'invention concerne donc un moteur à combustion interne comprenant notamment un conduit d'échappement des gaz et un circuit de refroidissement comportant un radiateur formé d'un faisceau tubulaire débouchant dans au moins une boite à eau. The invention therefore relates to an internal combustion engine comprising in particular a gas exhaust pipe and a cooling circuit comprising a radiator formed by a tubular bundle opening into at least one water box.

Ce moteur est caractérisé en ce que ladite boite à eau constitue un échangeur de chaleur chauffé par les gaz d'échappement, des moyens étant prévus pour deriver les gaz d'échappement vers cet échangeur tant que la température du moteur reste inférieure à une valeur donnée. This engine is characterized in that said water box constitutes a heat exchanger heated by the exhaust gases, means being provided for diverting the exhaust gases to this exchanger as long as the engine temperature remains below a given value. .

Le circuit de refroidissement comportant une soupape thermostatique interrompant la circulation du liquide de refroidissement à travers le faisceau tubulaire du radiateur tant que la température du moteur est inférieure à une valeur donnée, suivant une autre caractéris tique de l'invention, il est prévu un circuit de dérivation entre la soupape thermostatique, qui est du type à trois voies, et le côté de ladite boîte à eau opposé à celui par où pénètrent les gaz d'échappement. The cooling circuit comprising a thermostatic valve interrupting the circulation of the coolant through the tube bundle of the radiator as long as the engine temperature is below a given value, according to another characteristic of the invention, a circuit is provided. bypass between the thermostatic valve, which is of the three-way type, and the side of said water box opposite to that through which the exhaust gases penetrate.

Un exemple de réalisation fait l'objet de la description qui suit, en référence aux dessins joints dans lesquels
- la Fig. 1 est un schéma d'ensemble du moteur et de son circuit de refroidissement;
- la Fig. 2 est une section partielle suivant la ligne 2-2 de la Fig. 1.An exemplary embodiment is the subject of the following description, with reference to the accompanying drawings in which
- Fig. 1 is an overall diagram of the engine and its cooling circuit;
- Fig. 2 is a partial section along line 2-2 of FIG. 1.

On voit sur la Fig. 1, un moteur à explosions 1 comportant, notamment, un bloc-cylindres 2, une culasse 3 etuncollecteur d'échappement 4. We see in Fig. 1, an explosion engine 1 comprising, in particular, a cylinder block 2, a cylinder head 3 and an exhaust manifold 4.

Le moteur est refroidi par une circulation interne de liquide qui ressort, au niveau de la culasse 3, pour être dirigé par un conduit 5 vers un radiateur 6. Ce dernier comprend, ainsi qu'il est habituel, une boîte à eau supérieure 7, dans laquelle débouche le conduit 5, et une boîte à eau inférieure 8, reliées par un faisceau tubulaire 9. Le retour du liquide vers le moteur 1 se fait par un conduit 10 reliant la boîte à eau inférieure 8 au bloccylindres 2. Une pompe 11, entraînée par le moteur 1, assure la circulation du liquide. The engine is cooled by an internal circulation of liquid which emerges, at the level of the cylinder head 3, to be directed by a conduit 5 towards a radiator 6. The latter comprises, as is usual, an upper water box 7, into which opens the conduit 5, and a lower water box 8, connected by a tubular bundle 9. The return of the liquid to the motor 1 is done by a conduit 10 connecting the lower water box 8 to the cylinder blocks 2. A pump 11 , driven by the motor 1, ensures the circulation of the liquid.

Le collecteur d'échappement 4 aboutit à une boîte de dérivation 12 comportant deux sorties 13, 14 obturables, respectivement, par des clapets 15, 16 actionnés simultanément par une électro-vanne 17 commandée par une sonde thermostatique 18 sensible à la température du liquide à la sortie de la culasse 3. The exhaust manifold 4 leads to a junction box 12 comprising two outlets 13, 14 closable, respectively, by valves 15, 16 actuated simultaneously by a solenoid valve 17 controlled by a thermostatic probe 18 sensitive to the temperature of the liquid at the cylinder head outlet 3.

De la sortie 13, les gaz d'échappement sont dirigés vers l'atmosphère par un conduit 19. De la sortie 14, les gaz d'échappement sont dirigés, par un conduit 20, vers une extrémité de la boîte à eau inférieure 8. Là, le conduit 20 se divise en une série de tubes 21 traversant de part en part la boîte à eau 8 constituant un échan geur de chaleur. A la sortie de la boîte à eau a, les gaz sont à nouveau rassemblés dans un conduit 22 qui rejoint le conduit 19 en aval de la boîte de dérivation 12. From the outlet 13, the exhaust gases are directed towards the atmosphere by a conduit 19. From the outlet 14, the exhaust gases are directed, by a conduit 20, towards one end of the lower water box 8. There, the conduit 20 is divided into a series of tubes 21 passing right through the water box 8 constituting a heat exchanger. At the outlet of the water box a, the gases are again collected in a duct 22 which joins the duct 19 downstream of the junction box 12.

Sur le circuit de liquide de refroidissement, à la sortie de la culasse 3 , est placée, de manière habituelle, une soupape thermostatique 23 destinée à obturer le conduit 5 lorsque la température du liquide est inférieure à une valeur donnée. Cette soupape 23 est du type à trois voies et, lorsqu'elle ferme le conduit 5, elle ouvre un conduit de dérivation 24 qui relie la sortie de la culasse 3, au côté de la boîte à eau inférieure 8 opposé à celui par lequel pénètrent les gaz d'échappement amenés par le conduit 20 et par lequel également le liquide retourne au moteur par le conduit 10. On the coolant circuit, at the outlet of the cylinder head 3, is placed, in the usual way, a thermostatic valve 23 intended to close the duct 5 when the temperature of the liquid is below a given value. This valve 23 is of the three-way type and, when it closes the conduit 5, it opens a bypass conduit 24 which connects the outlet of the cylinder head 3, to the side of the lower water box 8 opposite to that through which penetrate the exhaust gases brought in through line 20 and through which also the liquid returns to the engine through line 10.

L'ensemble qui vient d'être décrit fonctionne comme suit
Lorsque le moteur est froid, la soupape thermostatique 23 ferme le conduit 5 et ouvre le conduit 24, le clapet 13 obture la sortie 15 de la boîte de dérivation 12, tandis que le clapet 16 laisse ouverte la sortie 14.The assembly which has just been described operates as follows
When the engine is cold, the thermostatic valve 23 closes the conduit 5 and opens the conduit 24, the valve 13 closes the outlet 15 of the junction box 12, while the valve 16 leaves the outlet 14 open.

Les gaz d'échappement sont alors dirigés vers le faisceau tubulaire 21 de la bote à eau 8 parcourue, à contre courant, par le liquide provenant du conduit de dérivation 24 et entraîné par la pompe 11.The exhaust gases are then directed towards the tubular bundle 21 of the water box 8 traversed, against the current, by the liquid coming from the bypass duct 24 and driven by the pump 11.

Comme le conduit 5 est fermé, il ne se produit pratiquement pas de circulation de liquide dans la boîte à eau supérieure 7 et le faisceau tubulaire 9 et le liquide qui circule dans la boîte à eau inférieure 8 se char ge des calories amenées par les gaz d'échappement. As the duct 5 is closed, there is practically no circulation of liquid in the upper water box 7 and the tube bundle 9 and the liquid which circulates in the lower water box 8 takes care of the calories brought by the gases exhaust.

On assure ainsi un réchauffage rapide du liquide de refroidissement, donc du moteur 1 qui atteint plus rapidement sa température normale de fonctionnement, ce qui réduit la consommation de carburant. This ensures rapid heating of the coolant, and therefore of the engine 1, which reaches its normal operating temperature more quickly, which reduces fuel consumption.

Lorsque le moteur est chaud, la sonde thermostatique 18 provoque, par l'intermédiaire de l'électrovanne 17, la fermeture du clapet 16 et l'ouverture du cla pet 15, ce qui interrompt la circulation des gaz d'échappement dans le faisceau tubulaire 21. When the engine is hot, the thermostatic probe 18 causes, by means of the solenoid valve 17, the closing of the valve 16 and the opening of the valve 15, which interrupts the circulation of the exhaust gases in the tube bundle 21.

Par ailleurs, la soupape thermostatique 23 ferme le conduit de dérivation 24 et ouvre le conduit 5 afin d'établir la circulation normale du liquide dans l'ensemble du radiateur 6. Furthermore, the thermostatic valve 23 closes the bypass duct 24 and opens the duct 5 in order to establish the normal circulation of the liquid throughout the radiator 6.

On voit que le dispositif décrit permet bien de résoudre le problème posé par des-moyens particulièrement simples et en toute sécurité. En effet, du fait de la communication entre la boîte à eau inférieure 8 et le reste du radiateur 6, il n'y a aucun risque d'élévation anormale de la température du liquide et l'interruption du passage des gaz dans la boîte à eau, lorsque le moteur est suffisamment chaud, arrête efficacement le réchauffage dès que celui-ci n'est plus nécessaire. It can be seen that the device described makes it possible to solve the problem posed by particularly simple means and in complete safety. Indeed, due to the communication between the lower water box 8 and the rest of the radiator 6, there is no risk of abnormal rise in the temperature of the liquid and the interruption of the passage of gases in the box. water, when the engine is sufficiently hot, effectively stops the heating as soon as it is no longer necessary.

La soupape thermostatique 23 peut fonctionner pour une température du liquide supérieure à celle qui entraîne le fonctionnement de la sonde 18, mais cela n'est pas une obligation.  The thermostatic valve 23 can operate for a temperature of the liquid higher than that which causes the operation of the probe 18, but this is not an obligation.

Claims (3)

REVENDICATIONS 1 - Moteur à combustion interne comprenant notamment un conduit (4, 19) d'échappement des gaz, et un circuit de refroidissement comportant un radiateur (6) formé d'un faisceau tubulaire (9) débouchant dans au moins une boîte à eau (8), caractérisé en ce que ladite boîte à eau (8) est adaptée pour constituer un échangeur de chaleur (20, 21, 22) relié au conduit d'échappement (4, 19) par un trajet de dérivation des gaz, des moyens (12, 18) étant prévus pour diriger les gaz d'échappement soit vers le trajet de dérivation, soit suivant leur trajet d'échappement normal, en fonction de la température du moteur. 1 - Internal combustion engine comprising in particular a gas exhaust duct (4, 19), and a cooling circuit comprising a radiator (6) formed by a tubular bundle (9) opening into at least one water box ( 8), characterized in that said water box (8) is adapted to constitute a heat exchanger (20, 21, 22) connected to the exhaust duct (4, 19) by a gas bypass path, means (12, 18) being provided to direct the exhaust gases either to the bypass path, or along their normal exhaust path, depending on the temperature of the engine. 2 - Moteur suivant la revendication 1, caractérisé en ce qu'il est prévu sur le trajet normal (4, 19) des gaz d'échappement, une boîte de dérivation (12) comportant deux sorties (13, 14) reliées respectivement, au conduit d'échappement (19) et à un conduit de dérivation (20), et obturables, respectivement, par des clapets (15, 16) actionnés par une électro-vanne (17) commandée à partir d'une sonde de température (18) sensible à la température du moteur. 2 - Engine according to claim 1, characterized in that it is provided on the normal path (4, 19) of the exhaust gases, a junction box (12) having two outputs (13, 14) connected respectively to the exhaust pipe (19) and to a bypass pipe (20), and closable, respectively, by valves (15, 16) actuated by a solenoid valve (17) controlled from a temperature probe (18 ) sensitive to engine temperature. 3 - Moteur suivant la revendication 1, comportant une soupape thermostatique interrompant la circulation du liquide de refroidissement à travers le faisceau tubulaire (9) du radiateur tant que la température du moteur est inférieure à une valeur donnée, caractérisé en ce qu'il est prévu un circuit de dérivation (24) entre la soupape thermostatique (23), qui est du type à trois voies et le côté de ladite boîte à eau (8), opposé à celui par où pénètrent les gaz d'échappement, le conduit (10) de retour du liquide de refroidissement vers le moteur, se trouvant par contre du côté de ladite boîte à eau où pénètrent les gaz d'échappement.  3 - Engine according to claim 1, comprising a thermostatic valve interrupting the flow of coolant through the tube bundle (9) of the radiator as long as the engine temperature is below a given value, characterized in that it is provided a bypass circuit (24) between the thermostatic valve (23), which is of the three-way type and the side of said water box (8), opposite to that through which the exhaust gases enter, the conduit (10 ) return of the coolant to the engine, being on the other hand on the side of said water box where the exhaust gases penetrate.
FR8018560A 1980-08-27 1980-08-27 Exhaust gas IC engine heating system - uses heat exchanger to transfer exhaust heat to engine cooling water when engine is below operating temp. Granted FR2489415A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8018560A FR2489415A1 (en) 1980-08-27 1980-08-27 Exhaust gas IC engine heating system - uses heat exchanger to transfer exhaust heat to engine cooling water when engine is below operating temp.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8018560A FR2489415A1 (en) 1980-08-27 1980-08-27 Exhaust gas IC engine heating system - uses heat exchanger to transfer exhaust heat to engine cooling water when engine is below operating temp.

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FR2489415A1 true FR2489415A1 (en) 1982-03-05
FR2489415B1 FR2489415B1 (en) 1984-11-30

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328000A1 (en) * 1983-08-03 1985-02-14 Volkswagenwerk Ag, 3180 Wolfsburg Cooling device for internal combustion engines
FR2579311A1 (en) * 1985-03-20 1986-09-26 Valeo Heat exchanger for a motor vehicle, in particular of the exhaust gas type
EP0197823A1 (en) * 1985-03-20 1986-10-15 Valeo Heat exchanger for a motor vehicle, particularly of the type for exhaust gases
DE19809859A1 (en) * 1998-03-07 1999-09-09 Mann & Hummel Filter Device for cooling gases
DE10146346A1 (en) * 2001-09-20 2003-04-10 Behr Gmbh & Co Coolant circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1089545A (en) * 1964-06-29 1967-11-01 Reginald Douglas Quinton Internal combustion engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1089545A (en) * 1964-06-29 1967-11-01 Reginald Douglas Quinton Internal combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3328000A1 (en) * 1983-08-03 1985-02-14 Volkswagenwerk Ag, 3180 Wolfsburg Cooling device for internal combustion engines
FR2579311A1 (en) * 1985-03-20 1986-09-26 Valeo Heat exchanger for a motor vehicle, in particular of the exhaust gas type
EP0197823A1 (en) * 1985-03-20 1986-10-15 Valeo Heat exchanger for a motor vehicle, particularly of the type for exhaust gases
US4685430A (en) * 1985-03-20 1987-08-11 Valeo Motor vehicle exhaust gas heat exchanger for heating engine coolant and lubricating oil
DE19809859A1 (en) * 1998-03-07 1999-09-09 Mann & Hummel Filter Device for cooling gases
DE10146346A1 (en) * 2001-09-20 2003-04-10 Behr Gmbh & Co Coolant circuit
US6792898B2 (en) * 2001-09-20 2004-09-21 Behr Gmbh & Co. Foley and lardner

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