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EP2097628B1 - Système de refroidissement à circulation d'eau haute/basse température et soupape à quatre voies pour un tel système - Google Patents

Système de refroidissement à circulation d'eau haute/basse température et soupape à quatre voies pour un tel système Download PDF

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Publication number
EP2097628B1
EP2097628B1 EP07857926.5A EP07857926A EP2097628B1 EP 2097628 B1 EP2097628 B1 EP 2097628B1 EP 07857926 A EP07857926 A EP 07857926A EP 2097628 B1 EP2097628 B1 EP 2097628B1
Authority
EP
European Patent Office
Prior art keywords
low temperature
port
outlet
pump
coolant
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.)
Active
Application number
EP07857926.5A
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German (de)
English (en)
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EP2097628A1 (fr
Inventor
Arnaud Contet
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.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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Publication of EP2097628A1 publication Critical patent/EP2097628A1/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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F02B29/0437—Liquid cooled heat exchangers
    • F02B29/0443—Layout of the coolant or refrigerant circuit
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P2005/105—Using two or more 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
    • F01P2037/00—Controlling
    • F01P2037/02—Controlling starting
    • 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
    • F01P2060/02—Intercooler
    • 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
    • F01P2060/06—Retarder

Definitions

  • the present invention concerns a high/low temperature water cooling system comprising a high temperature cooling circuit and a low temperature cooling circuit including :
  • the invention concerns a four port valve for a high/low temperature water cooling system.
  • a cooling system is known from the international patent application WO 02/48516 A1 .
  • an invention is described aiming to lowering fuel consumption of a supercharged combustion engine by optimizing coolant flow through a high temperature cooler or HT cooler and a low temperature or LT cooler.
  • the HT cooler is provided to cool the engine itself and is fed by a first coolant pump, wherein the LT cooler is provided to cool at least a water cooled charge air cooler, in short a WCCAC.
  • the WCCAC is connected to a second coolant pump and is provided to cool supercharged air before it is blown into the engine. Since there are two individual cooling circuits, it is possible to adopt individual cooling strategies for both circuits and thus to minimize the heat energy loss for the overall system, which is highly beneficial to fuel consumption.
  • combustion or charge air fed to the engine by a supercharger requires less cooling or no cooling at all to adopt a desirable value of approximately 20°C.
  • the prior art system can account for that by reducing or entirely cutting off coolant flow in its LT cooling circuit.
  • ambient conditions well below the freezing point e.g. -20°C
  • the prior art system has no arrangements at all to address these problems.
  • HT engine cooling circuits like the one disclosed in the prior art application, have a thermostat.
  • the thermostat is arranged to control a bypass from the engine coolant outlet to the engine coolant inlet in parallel with the HT heat exchanger.
  • the thermostat is closed entirely and coolant is bypassed the HT heat exchanger in order to be heated more rapidly.
  • the only source for heating the coolant is the engine itself, and especially if the engine is a diesel engine the warm up times tend to be extensive.
  • the prior art system has no arrangements to address the problems posed by that.
  • the object of the invention is to solve the problems with the prior art high/low temperature water cooling system according to the preamble.
  • said low temperature cooling circuit further including:
  • the multi port valve rendered possible for the high/low temperature water cooling system to fulfil both traditional charge air cooling tasks in a cooling mode and to fulfil additional tasks in a heat up mode.
  • the additional tasks are charge air heating in cold ambient conditions by using hot coolant from the HT cooling circuit in the LT cooling circuit and promotion of engine warm up by using hot coolant from the LT cooling circuit in the HT cooling circuit.
  • the high temperature cooling circuit further includes: an engine coolant outlet connected to a high temperature heat exchanger, an engine coolant inlet connected to the high temperature heat exchanger, a thermostat for controlling a first bypass from the engine coolant outlet to the engine coolant inlet in parallel with the high temperature heat exchanger, and a said first coolant pump.
  • the low temperature cooling circuit further includes: a circuit outlet connectable to the second coolant pump outlet and to the high temperature cooling circuit upstream the first coolant pump, a circuit inlet connected to the pump inlet and to the high temperature cooling circuit downstream the first coolant pump.
  • the second coolant pump is arranged to be off in the heat up mode and to be on in a charge air cooling mode thus optimizing coolant flow and energy consumption in both modes.
  • system according to the invention further comprises a water cooled retarder connected to the high temperature cooling circuit, wherein said valve is arranged to interconnect the first and forth port and to block the second and third port in a retarder braking mode.
  • the LT heat exchanger can be used to dissipate retarder heat in a mode where no charge air cooling is needed, thus enabling prolonged retarder braking.
  • the second coolant pump is arranged to be off, thus optimizing coolant flow in the LT cooling circuit in that mode.
  • a degassing circuit comprising a high level outlet on the engine, a high level outlet on the high temperature heat exchanger, a high level outlet on the low temperature heat exchanger and a high level outlet on said charge air cooler, all four outlets being connected to a common expansion tank, and further comprising a low level outlet on the expansion tank, said outlet being connected to the high temperature cooling circuit upstream the first coolant pump.
  • the expansion tank common to all four outlets and the sole expansion tank outlet exploit in a most effective and weight saving way that the high temperature and the low temperature cooling circuits are interconnected in the system according to the invention.
  • the multi port valve is arranged to block all four ports in a engine heat up mode when ambient conditions are moderate or in a braking mode when braking without use of said retarder, thus concentrating all of the HT coolant to the HT cooling circuit alone.
  • the present invention concerns also a four port valve for a high/low temperature water cooling system according to the invention, said valve having a circular valve chamber having a first circumferential port, a second circumferential port 90° apart from said first port, a third circumferential port 45° further apart from said first port than said second port and a fourth circumferential port 90° further apart from said first port than said third port, and a rotatable valve slider tightly fitting inside the valve chamber and having a first and a second circumferential orifice interconnected by a duct extending through the valve slider, said first and second orifice being 135° apart and alignable with two ports at a time.
  • a four port valve designed according to the invention is durable and easy to control and thus suitable for rough conditions, such as in a truck.
  • valve is arranged to be controlled electronically and in coordination with the second coolant pump, thereby optimizing coolant flow and energy consumption in a simple way.
  • a diesel engine 3 e.g. for a truck, is provided with a high temperature or HT cooling circuit 4 and a water cooled retarder 24 connected to the engine 3.
  • the HT cooling circuit 4 includes an engine coolant outlet 5 connected to an HT heat exchanger 6, an engine coolant inlet 7 connected to the HT heat exchanger 6, a thermostat 8 for controlling a first bypass 9 from the engine coolant outlet 5 to the engine coolant inlet 7 in parallel with the HT heat exchanger 6, and a first coolant pump 10.
  • the WCCAC 2 is arranged to cool supercharged combustion air blown into the diesel engine 3 for enhancing engine performance and forms an integral part of the LT cooling circuit 11, which also includes a low temperature or LT heat exchanger 12 and a second coolant pump 13 having a pump inlet 14 and a pump outlet 15.
  • the LT cooling circuit 11 further includes a circuit outlet 16 connectable to the pump outlet 15 and to the HT cooling circuit 4 upstream the first coolant pump 10, a circuit inlet 17 connected to the pump inlet 14 and to the HT cooling circuit 4 downstream the first coolant pump 10, and a multi port valve 18.
  • the multi port valve 18 is preferably a four port one like the valve shown in greater detail in Fig. 5 . It has a first port 19 which is connected to the LT heat exchanger 12, a second port 20 which is connected to a second bypass 21 in parallel with the LT heat exchanger 12, a third port 22 which is connected to the pump outlet 15, and a fourth port 23 which is connected to the circuit outlet 16.
  • the valve 18 is preferably controlled by electronics (not shown) governing the entire high/low temperature water cooling system 1.
  • valve ports 19, 20, 22, 23 are circumferential ports distributed round a circular valve chamber 25.
  • the second port 20 lies circumferentially 90° apart from said first port 19
  • the third port 22 another 45° further apart from said first port 19 than said second port 20
  • the fourth port 23 another 90° further apart from said first port 19 than said third port 22.
  • a rotatable valve slider 26 tightly fitting inside the valve chamber 25. It has a first and a second circumferential orifice 27, 28 interconnected by a duct 29 extending through the valve slider 26.
  • the first and second orifices 27, 28 lie 135° apart and are alignable with a maximum of two ports 19, 20, 22, 23 at a time.
  • the high/low temperature water cooling system 1 described can adopt different modes of operation by aid of the four port valve 18.
  • the second coolant pump 13 is preferably off (mainly to save energy) and the valve slider 26 is rotated to block the first 19 and third 22 port and to interconnect the second 20 and fourth 23 port.
  • major coolant flows are created through the circuit inlet 17 from the HT cooling circuit 4 to the LT cooling circuit 11 and through the circuit outlet 16 from the LT cooling circuit 11 back to the HT cooling circuit 4.
  • the flow inside the LT cooling circuit 11 itself is a reversed one (created by the first coolant pump 10) and bypasses the LT heat exchanger 12 entirely.
  • the resulting mode is a heat up mode used either to enhance cold engine heat up by heat generated in the WCCAC 2 or to heat the charge air in the WCCAC 2 in cold ambient conditions, e.g. -20°C once the engine 3 is heated up, thereby preventing knocking due to an excess air density.
  • a second operational mode illustrated in Figs. 3 and 7 , the second coolant pump 13 is on and the valve slider 26 is rotated to interconnect the first 19 and third 22 port and to block the second 20 and fourth 23 port.
  • the flow inside the LT cooling circuit 11 is a forward one (created by the second coolant pump 13) and goes through the LT heat exchanger 12.
  • the resulting mode is a traditional charge air cooling mode enhancing engine performance in normal driving conditions by increasing density of the charge air boosted into the engine 3.
  • a third operational mode illustrated in Figs. 4 and 8 , the second coolant pump 13 is off (to save energy and enhancing system performance) and the valve slider 26 is rotated to interconnect the first 19 and third 22 port and to block the second 20 and fourth 23 port.
  • major coolant flows are created through the circuit inlet 17 from the HT cooling circuit 4 to the LT cooling circuit 11 and through the circuit outlet 16 from the LT cooling circuit 11 back to the HT cooling circuit 4.
  • the flow inside the LT cooling circuit 11 itself is a reversed one (created by the first coolant pump 10), but this time it goes through the LT heat exchanger 12.
  • the resulting mode is a retarder cooling mode, in which the LT heat exchanger 12 is used as an extra means to dissipate retarder heat created while retarder braking.
  • a forth operational mode for which the valve position is illustrated in Fig. 9 , the second coolant pump 13 is off and the valve slider 26 is rotated to block all four ports 19, 20, 22, 23.
  • This mode in which there is no coolant flow at all inside and to and fro the LT cooling circuit 11 and all coolant circulation is reserved for the HT cooling circuit alone, is an engine heat up mode used mainly when warming up the engine 3 at idling speed.
  • a degassing circuit 30 is shown, said circuit forming an integral part of the high/low temperature water cooling system 1. It comprises a high level outlet 31 on the engine 3, a high level outlet 32 on the high temperature heat exchanger 6, a high level outlet 33 on the low temperature heat exchanger 12 and a high level outlet 34 on said charge air cooler 2. All four outlets 31-34 are connected to a common expansion tank 35 and serve to lead off excess coolant, when the system 1 is heated up, and to vent air, if air is entrapped in the system 1.
  • the expansion tank 35 is intended to contain a bottom layer of coolant and air on top of that, the air being pressurised when the system 1 is heated up and the coolant thus expands.
  • the degassing circuit 30 further comprises a low level outlet 36 on the expansion tank 35. The outlet 36 serves to return coolant to the system 1 when the system is cooling down and is connected to the high temperature cooling circuit 4 upstream the first coolant pump 10.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Temperature-Responsive Valves (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Claims (8)

  1. Système de refroidissement à circulation d'eau haute/basse température (1), comprenant un circuit de refroidissement haute température (4) comprenant une première pompe de refroidissement (10) et une première dérivation (9) et un circuit de refroidissement basse température (11) comprenant :
    un refroidisseur d'air de suralimentation refroidi par eau (2) pour un moteur à combustion (3),
    un échangeur de chaleur basse température (12) et
    une seconde pompe (13), ladite seconde pompe ayant une entrée de pompe (14) et une sortie de pompe (15),
    une soupape multivoies (18),
    caractérisé en ce que
    le circuit de refroidissement basse température (11) comprend en outre :
    une première voie (19) reliée à l'échangeur de chaleur basse température (12),
    une deuxième voie (20) reliée à une seconde dérivation (21), ladite seconde dérivation étant en parallèle avec l'échangeur de chaleur basse température (12),
    une troisième voie (22) reliée à la sortie de pompe (15) de ladite seconde pompe, et
    une quatrième voie (23) reliée à une sortie de circuit (16) dudit circuit de refroidissement basse température (11),
    ladite soupape (18) étant conçue pour bloquer les première (19) et troisième (22) voies et pour interconnecter les deuxième (20) et quatrième (23) voies dans un mode de chauffage, ou
    pour interconnecter les première (19) et troisième (22) voies et pour bloquer les deuxième (20) et quatrième (23) voies dans un mode de refroidissement.
  2. Système de refroidissement à circulation d'eau haute/basse température selon la revendication 1, comprenant en outre :
    un circuit de refroidissement haute température (4) comprenant :
    une sortie de liquide de refroidissement de moteur (5) reliée à un échangeur de chaleur haute température (6),
    une entrée de liquide de refroidissement de moteur (7) reliée à l'échangeur de chaleur haute température (6),
    un thermostat (8) pour commander la première dérivation (9) de la sortie de liquide de refroidissement de moteur (5) à l'entrée de liquide de refroidissement de moteur (7) en parallèle avec l'échangeur de chaleur haute température (6), et
    ladite première pompe de refroidissement (10).
  3. Système de refroidissement à circulation d'eau haute/basse température selon la revendication 2, le circuit de refroidissement basse température (11) comprenant en outre :
    une sortie de circuit (16) pouvant être reliée à la sortie (15) de la seconde pompe de refroidissement et au circuit de refroidissement haute température (4) en amont de la première pompe de refroidissement (10),
    une entrée de circuit (17) reliée à l'entrée de pompe (14) et au circuit de refroidissement haute température (4) en aval de la première pompe de refroidissement (10).
  4. Système de refroidissement à circulation d'eau haute/basse température selon l'une quelconque des revendications 1 à 3, la seconde pompe de refroidissement (13) étant conçue pour être éteinte dans le mode de chauffage et pour être allumée dans un mode de refroidissement d'air de suralimentation.
  5. Système de refroidissement à circulation d'eau haute/basse température selon l'une quelconque des revendications 1 à 4, comprenant en outre un ralentisseur refroidi par eau (24) relié au circuit de refroidissement haute température (4), ladite soupape (18) étant conçue pour interconnecter les première (19) et quatrième (23) voies et pour bloquer les deuxième (20) et troisième (22) voies dans un mode de freinage par ralentisseur.
  6. Système de refroidissement à circulation d'eau haute/basse température selon la revendication 5, la seconde pompe de refroidissement (13) étant conçue pour être éteinte dans le mode de freinage par ralentisseur.
  7. Système de refroidissement à circulation d'eau haute/basse température selon l'une quelconque des revendications 1 à 6, ladite soupape (18) étant conçue pour bloquer les quatre voies (19, 20, 22, 23) dans un mode de chauffage de moteur pour des conditions ambiantes modérées ou dans un mode de freinage sans ralentisseur.
  8. Système de refroidissement à circulation d'eau haute/basse température selon l'une quelconque des revendications 2 à 7, un circuit de dégazage (30) étant prévu, comprenant une sortie de niveau élevé (31) sur le moteur (3), une sortie de niveau élevé (32) sur l'échangeur de chaleur haute température (6), une sortie de niveau élevé (33) sur l'échangeur de chaleur basse température (12) et une sortie de niveau élevé (34) sur ledit refroidisseur d'air de suralimentation (2), les quatre sorties (31-34) étant reliées à un vase d'expansion commun (35), et comprenant en outre une sortie de niveau bas (36) sur le vase d'expansion (35), ladite sortie étant connectée au circuit de refroidissement haute température (4) en amont de la première pompe de refroidissement (10).
EP07857926.5A 2006-12-29 2007-12-20 Système de refroidissement à circulation d'eau haute/basse température et soupape à quatre voies pour un tel système Active EP2097628B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0602837A SE0602837L (sv) 2006-12-29 2006-12-29 Hög-/lågtemperaturvattenkylsystem med en vattenkyld laddluftkylare för en förbränningsmotor och en fyrvägsventil för ett sådant system
PCT/EP2007/064305 WO2008080872A1 (fr) 2006-12-29 2007-12-20 Système de refroidissement à circulation d'eau haute/basse température et soupape à quatre voies pour un tel système

Publications (2)

Publication Number Publication Date
EP2097628A1 EP2097628A1 (fr) 2009-09-09
EP2097628B1 true EP2097628B1 (fr) 2018-09-12

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EP07857926.5A Active EP2097628B1 (fr) 2006-12-29 2007-12-20 Système de refroidissement à circulation d'eau haute/basse température et soupape à quatre voies pour un tel système

Country Status (3)

Country Link
EP (1) EP2097628B1 (fr)
SE (1) SE0602837L (fr)
WO (1) WO2008080872A1 (fr)

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Publication number Priority date Publication date Assignee Title
EP3815948B1 (fr) * 2019-11-01 2023-06-07 Volvo Truck Corporation Système combiné de refroidissement et de freinage par eau pour un véhicule, et procédé de refroidissement d'un dispositif de propulsion d'un véhicule et de freinage par eau d'une paire de roues d'un véhicule
EP4127433A4 (fr) * 2020-03-23 2024-04-24 Scania CV AB Système de régulation de température, véhicule équipé de celui-ci et procédé de commande de son fonctionnement
US12218326B2 (en) 2020-03-23 2025-02-04 Scania Cv Ab Temperature control system, a vehicle provided therewith and a method for controlling the operation thereof
US12065959B2 (en) 2022-09-09 2024-08-20 Cummins Inc. Thermal management of exhaust gas with charge air heating

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SE530376C2 (sv) 2008-05-20
WO2008080872A1 (fr) 2008-07-10
SE0602837L (sv) 2008-05-20
EP2097628A1 (fr) 2009-09-09

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