EP2578838B1 - Système de refroidissement pour moteur - Google Patents

Système de refroidissement pour moteur Download PDF

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Publication number
EP2578838B1
EP2578838B1 EP11183658.1A EP11183658A EP2578838B1 EP 2578838 B1 EP2578838 B1 EP 2578838B1 EP 11183658 A EP11183658 A EP 11183658A EP 2578838 B1 EP2578838 B1 EP 2578838B1
Authority
EP
European Patent Office
Prior art keywords
ball
cooling system
volume
relief valve
air relief
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
EP11183658.1A
Other languages
German (de)
English (en)
Other versions
EP2578838A1 (fr
Inventor
John Nilsson
Kaj Johansson
Sassan Marandi
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.)
Volvo Car Corp
Original Assignee
Volvo Car Corp
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 Volvo Car Corp filed Critical Volvo Car Corp
Priority to EP11183658.1A priority Critical patent/EP2578838B1/fr
Publication of EP2578838A1 publication Critical patent/EP2578838A1/fr
Application granted granted Critical
Publication of EP2578838B1 publication Critical patent/EP2578838B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/028—Deaeration devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • 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
    • F01P11/0285—Venting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • 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 present invention relates to a cooling system for a vehicle engine, the system comprising an expansion tank, a water pump and a radiator, wherein the water pump is connected upstream the engine and downstream the radiator.
  • Friction from a vehicle engine's operation results in extremely high temperatures.
  • automakers install cooling systems in automobiles.
  • the cooling system technology needed to adapt to the demands of these new engines.
  • some car-manufacturing companies created new cooling components.
  • a clear example of such is the expansion tank.
  • An expansion tank is a container that provides extra storage space for the expansion of a coolant, a fluid used to dissipate heat.
  • An expansion tank hose ensures the optimum flow of coolant as it connects the vehicle's radiator with an expansion tank.
  • An expansion tank is sometimes called coolant reservoir or overflow canister.
  • the expansion tank also makes the cooling system more efficient by eliminating the air bubbles from the coolant. Coolant without air bubbles absorbs heat much faster. When the engine is sufficiently cooled, a vacuum in the cooling system sucks back the coolant through the expansion tank hose. A properly functioning cooling system does not lose any coolant as the tank hose completes it as a virtually closed system. Even if the level of coolant in the expansion tank rises and falls, the radiator remains full all the time.
  • Cooling systems with cabin heater pipes and degasing systems are known from FR 2 317 489 or KR 2010 0024249 .
  • the object of the present invention is to provide a cooling system which decreases the amount of coolant that needs to be used and thus heated.
  • a cooling system for a vehicle engine comprises an expansion tank, a water pump and a radiator, wherein the water pump is connected upstream the engine and downstream the radiator.
  • the engine comprises a second coolant outlet connected to a cabin heater and an air relief valve connected downstream said second coolant outlet and upstream said cabin heater on the cabin heater pipe.
  • the air relief valve is connected to the expansion tank with a degas line, and the expansion tank outlet is connected upstream the water pump.
  • the coolant in the expansion tank need not be heated under normal conditions. This of course saves fuel. Measurements made on one setup have shown that the fuel consumption is 0.4% lower with a blocked flow in engine deaeration. This does not mean that all flow is blocked, an air relief valve should let gas/air through but stop or at least minimize the flow of coolant through the valve.
  • the air relief valve comprises a ball valve. If gas/air is present in the coolant tests have shown that the air leakage is about 50 times greater than compared to the leakage of coolant. Further, the tests have also shown that when there is only coolant left in the system, the valve is tight. The situation with air/gas in the coolant generally arises when coolant is filled into the cooling system which with a normally functioning system is very seldom.
  • the air relief valve further comprises a first volume part upstream of the ball holding volume.
  • This volume functions as a "calm room” which catches the gas/air-bubbles.
  • this first volume of the air relief valve has a cylindrical shape, a major reason being the advantage from a production point of view.
  • the length of the first volume is between 5 and 15 mm and also is to have the diameter of the first volume between 5 and 10 mm.
  • the ball in the ball valve is a steel ball.
  • One of the advantages is the relatively low cost of steel and another being that it is easy to produce.
  • the ball has a diameter between 2 and 5 mm and more preferably the ball has a diameter between 2,5 and 3,5 mm.
  • the ball valve holding the ball has according to the present invention a cylinder shaped part with a diameter between 5 and 10 mm. Further, the volume holding the ball has according to yet another aspect of the present invention a length between 5 and 60 mm.
  • the opening between the first volume and the ball holding volume has a diameter between 1 and 4 mm.
  • the housing of the air relief valve is made of a plastic material.
  • a plastic material is beneficial from both a cost perspective and from a manufacturing point of view.
  • the opening in the cabin heater pipe for the air relief valve has a diameter between 6 and 11 mm.
  • the air relief valve is arranged perpendicular to the flow in the cabin heater pipe.
  • Figure 1 is a cross section of an air relief valve 7 arranged on a cabin heater pipe 8 and further connected downstream to a degas line 9.
  • the air relief valve 7 comprises a ball valve part 11 and upstream the ball valve 11 a calm room 12. Gas or air bubbles 17 are caught in the calm room 12 after having flowed through an opening in the cabin heater pipe 8.
  • the diameter of the opening in the cabin heater pipe 8 is 8,5 mm as well as the diameter of the calm room 12. If present, the bubbles 17 flows through the length of the calm room 12 which in one embodiment is 10 mm and thereafter passes through an opening 15 with a diameter of 2 mm.
  • the bubbles now enter the ball valve 11 wherein the volume 13 holding the ball 14 has a diameter of 4 mm.
  • the ball 14 is in this case a steel ball with a diameter of 3 mm.
  • FIG. 2 shows a cooling system for a vehicle engine 1.
  • the system comprises an expansion tank 2, a water pump 3 and a radiator 4, wherein the water pump 3 is connected upstream the engine 1 and downstream the radiator 4.
  • the engine 1 further comprises a second coolant outlet 5 connected to a cabin heater 6 and an air relief valve 7 connected downstream said second coolant outlet 5 and upstream said cabin heater 6 on the cabin heater pipe 8.
  • the air relief valve 7 is connected to the expansion tank 2 with a degas line 9 and the expansion tank outlet 10 is connected upstream the water pump 3.
  • FIG 2 there is also shown a fuel operated heater 18, a further valve 19 and an electric water pump (start/stop) 20 in connection with the air relief valve 7 and the cabin heater 6.
  • a turbo 21 oil cooler 22 and thermostat 23 for the oil cooler.
  • a further thermostat 24 Upstream the radiator 4 there is a further thermostat 24 and with the radiator there is shown a sub cooler 25 and charge air cooler 26, the sub cooler further being connected to a transmission oil cooler 27.
  • the thermostat 23 is connected to an electric water pump 28 and then to exhaust gas recirculation 29.
  • the second coolant outlet 5 there is also a coolant temperature sensor.

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)

Claims (9)

  1. Système de refroidissement pour un moteur (1) de véhicule, le système comprenant un réservoir d'expansion (2), une pompe à eau (3) et un radiateur (4), dans lequel la pompe à eau (3) est raccordée en amont du moteur (1) et en aval du radiateur (4), dans lequel le moteur (1) comprend en outre une seconde sortie de liquide de refroidissement (5) raccordée à un dispositif de chauffage de cabine (6) et une soupape de dégagement d'air (7) raccordée en aval de ladite seconde sortie de liquide de refroidissement (5) et en amont dudit dispositif de chauffage de cabine (6) sur le tuyau de chauffage de cabine (8), la soupape de dégagement d'air (7) étant raccordée au réservoir d'expansion (2) par une conduite de dégazage (9), la sortie (10) du réservoir d'expansion étant raccordée en amont de la pompe à eau (3), dans lequel la soupape de dégagement d'air (7) comprend un volume de retenue de bille (13) avec un clapet à bille (11), dans lequel la soupape de dégagement d'air (7) comprend en outre une première partie de volume (12) en amont du volume de retenue de bille (13), dans lequel le diamètre du premier volume (12) est compris entre 5 et 10 mm et dans lequel l'ouverture (15) entre le premier volume (12) et le volume de retenue de bille (13) présente un diamètre compris entre 1 et 4 mm, dans lequel le premier volume (12) de la soupape de dégagement d'air présente une forme cylindrique, et dans lequel la soupape de dégagement d'air (7) est disposée perpendiculairement à l'écoulement dans le tuyau de chauffage de cabine (8).
  2. Système de refroidissement selon la revendication 1, dans lequel la longueur du premier volume (12) est comprise entre 5 et 15 mm.
  3. Système de refroidissement selon la revendication 1 ou la revendication 2, dans lequel la bille (14) est une bille d'acier.
  4. Système de refroidissement selon l'une quelconque des revendications 1 à 3, dans lequel la bille (14) présente un diamètre compris entre 2 et 5 mm.
  5. Système de refroidissement selon la revendication 4, dans lequel la bille (14) présente un diamètre compris entre 2,5 et 3,5 mm.
  6. Système de refroidissement selon l'une quelconque des revendications 1 à 5, dans lequel le volume (13) du clapet à bille (7) retenant la bille comprend une partie en forme de cylindre d'un diamètre compris entre 2,5 et 6,5 mm.
  7. Système de refroidissement selon la revendication 6, dans lequel le volume (13) retenant la bille (14) présente une longueur comprise entre 5 et 60 mm.
  8. Système de refroidissement selon l'une quelconque des revendications précédentes, dans lequel le logement (16) de la soupape de dégagement d'air (7) est fait d'un matériau plastique.
  9. Système de refroidissement selon l'une quelconque des revendications précédentes, dans lequel l'ouverture (17) dans le tuyau de chauffage de cabine (8) pour la soupape de dégagement d'air (7) présente un diamètre compris entre 6 et 11 mm.
EP11183658.1A 2011-10-03 2011-10-03 Système de refroidissement pour moteur Active EP2578838B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11183658.1A EP2578838B1 (fr) 2011-10-03 2011-10-03 Système de refroidissement pour moteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11183658.1A EP2578838B1 (fr) 2011-10-03 2011-10-03 Système de refroidissement pour moteur

Publications (2)

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EP2578838A1 EP2578838A1 (fr) 2013-04-10
EP2578838B1 true EP2578838B1 (fr) 2020-03-18

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104265436B (zh) * 2014-09-04 2016-07-13 河北御捷车业有限公司 后置单缸水冷汽车发动机冷却循环系统
CN105971716A (zh) * 2016-07-01 2016-09-28 无锡雨德智能物联网科技有限公司 一种自动排气汽车散热器
CN115163287A (zh) * 2022-06-29 2022-10-11 东风汽车集团股份有限公司 一种排气装置、冷却循环系统以及汽车

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100024249A (ko) * 2008-08-25 2010-03-05 한라공조주식회사 차량의 엔진 냉각 시스템
CN101749098A (zh) * 2009-12-15 2010-06-23 奇瑞汽车股份有限公司 通气阻液截止阀

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2314301C3 (de) * 1973-03-22 1978-07-20 Bayerische Motoren Werke Ag, 8000 Muenchen Unilaufkiihlvorrichtung für Kolbenbrennkraftmaschinen
FR2317489A1 (fr) * 1975-07-11 1977-02-04 Citroen Sa Perfectionnements apportes aux circuits de refroidissement pour moteurs a combustion
JP3747902B2 (ja) * 2002-09-27 2006-02-22 ふそうエンジニアリング株式会社 内燃機関の冷却システム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100024249A (ko) * 2008-08-25 2010-03-05 한라공조주식회사 차량의 엔진 냉각 시스템
CN101749098A (zh) * 2009-12-15 2010-06-23 奇瑞汽车股份有限公司 通气阻液截止阀

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