EP0816651B1 - Dispositif de refroidissement d'un moteur à combustion interne - Google Patents

Dispositif de refroidissement d'un moteur à combustion interne Download PDF

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Publication number
EP0816651B1
EP0816651B1 EP19970401370 EP97401370A EP0816651B1 EP 0816651 B1 EP0816651 B1 EP 0816651B1 EP 19970401370 EP19970401370 EP 19970401370 EP 97401370 A EP97401370 A EP 97401370A EP 0816651 B1 EP0816651 B1 EP 0816651B1
Authority
EP
European Patent Office
Prior art keywords
circuit
inlet
outlet
radiator
mixer
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 - Lifetime
Application number
EP19970401370
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0816651A1 (fr
Inventor
Frank Bultel
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen 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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0816651A1 publication Critical patent/EP0816651A1/fr
Application granted granted Critical
Publication of EP0816651B1 publication Critical patent/EP0816651B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • 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
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/028—Cooling cylinders and cylinder heads in series
    • 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
    • F01P2025/50—Temperature using two or more temperature sensors

Definitions

  • the present invention relates to a device for cooling of an internal combustion engine, two or four stroke, allowing to differentiate the temperature reached by cylinder head and cylinder block of this motor respectively, with a view in particular to reducing gross emissions of pollutants, in particular particular when starting the engine, and to decrease the temperature rise time of a catalyst provided in the gas exhaust line to increase its speed of action.
  • the invention therefore relates to a device which makes it possible to decrease the line temperature rise time exhaust gas and simultaneously raising quickly and maintain the temperature of the walls of the engine block at low load to a sufficient value, in improving in all cases the conditions of operation of this engine at all speeds.
  • French patent FR-A-2 594 84 describes a device for cooling for an internal combustion engine according to the preamble of claim 1 comprising a cylinder block and a cylinder head, device comprising a radiator and a circuit provided a pump for the circulation of a cooling between this radiator and the engine block.
  • the circuit is divided into two parts, established respectively in the walls of the cylinder block and in those of the breech, these two parts being put in series, the one that interests the cylinder block being arranged downstream from each other in the direction of circulation of the fluid.
  • a set of valves is provided to control the flow of this fluid, either in one, either in the two parts of the circuit, depending on predetermined valve trip thresholds.
  • Such a system is however complex to implement, cumbersome to to implement and expensive to manufacture. Furthermore, it aims at a completely different objective which consists in maintaining in constantly coolant temperature in the cylinder head at a level lower than that corresponds to the cylinder block, in order to obtain lower temperatures in the combustion chamber to limit the self-ignition phenomenon, while the higher temperature in the cylinder block lowers the viscosity of the lubricating oil and reduces the friction of the pistons in their shirts.
  • the invention relates to a device of more simple and which allows a higher temperature rise rapid catalyst combined with optimal reduction of polluting emissions, before it reaches its full efficiency.
  • the device considered, for a motor with internal combustion comprising a cylinder block and a cylinder head whose walls are arranged to delimit a first and second separate parts of the same circuit for the separate cooling of these walls, a radiator with an input and an output connected to the circuit and a circulation pump for a fluid cooling in it the radiator outlet being connected, by means of the traffic, at the entrance to the first part of the circuit provided in the cylinder head, the exit of this first part being separated in two ways, one of which is connected to the radiator inlet and the other to the inlet of the second part of the circuit planned in the block cylinders, the output of this second part being also connected to the radiator input, is characterized in that the entrance to the first part of the circuit is provided in the side wall fluid swept cylinder head inlet, outlet of this first part being provided on the side exhaust.
  • the entry of the second part of the circuit, connected to the output of the first part, and the output of this second part are one and the other provided in the wall on the exhaust side of the cylinder block.
  • the first part of the circuit has, between its input and its output, transverse connecting conduits, extending in the cylinder head wall between the spark plugs and / or injectors fuel in the engine cylinders.
  • the second part of the circuit in the wall of the cylinder block has a hairpin profile.
  • the input of the radiator is connected to the outputs of the first and second parts of the circuit by a first thermostatic mixer, the trigger point is set by construction to a setpoint temperature T1.
  • the output of the first mixer is connected to the input of the radiator or directly to the circulation pump by through a bypass line and a second thermostatic mixer with a trigger threshold is set at a set temperature T2, different or nonde T1.
  • the second thermostatic mixer is placed downstream of the first mixer, in the direction of the circulation of the fluid in the circuit.
  • the set temperature T1 of the first thermostatic mixer is less than or equal to the setpoint temperature T2 of the second.
  • one or both thermostatic mixers is associated with a drawer hydraulic adjusting the fluid flow rates cooling delivered to these mixers by the circuit.
  • each thermostatic mixer comprises a body containing a block of expandable material under the effect of temperature variation and acting on a piston movable in a guide carried by the body.
  • a tampon intermediate is mounted between the material block and the piston, which is joined to a spring of reminder.
  • the block of expandable material acts on the piston to through a waterproof diaphragm or the like.
  • the reference 1 designates very schematically an internal combustion engine, the two essential parts consist of a cylinder block 2 and a cylinder head 3.
  • the block 2 has four parallel cylinders 4, arranged vertically, the cylinder head 3 comprising, in line with these cylinders, intake manifolds such as 5.
  • block 2 may include a different number of cylinders 4, these being arranged in another orientation, in V for example.
  • engine considered may be direct injection or indirect, with conventional spark plug ignition or by compression.
  • Reference 6 designates as a whole a closed circuit for the circulation of a coolant of the motor, this circuit being formed of two parts separate, respectively 7 and 8, in series, one with the other, the first being arranged in the thickness of the wall of the cylinder head 3 and the second in that of the block cylinders 2.
  • This circuit also includes a radiator 9, conventionally associated with a fan 9a ( Figure 2), and a circulation pump 10.
  • the first part 7 of circuit 6 has an input E1 for the fluid delivered by the pump 10 and, after this has circulated in the wall of the cylinder head 3, a output S1.
  • the second part 8 of this circuit arranged downstream from the first in the direction of the circulation of the fluid shown diagrammatically by the arrows and fitted in the wall of the cylinder block 2, comprises also an E2 input and an S2 output, the E2 input being connected to the output Si of the first part.
  • the output Si of the first part actually subdivides into two separate tracks, S11 and S12 respectively, channel S11 being alone connected to input E2 of the second part 8 of the circuit, while channel S12 is connected, by via a line 11, at the entrance R1 of the radiator 9.
  • the R2 output of this radiator is for its part joined by a line 12, through the pump circulation 10, at the entrance E1 of the first part 7 of circuit.
  • the second channel S12 at the output S1 of the first part 7 is connected to the pipe 11 via a first thermostatic mixer M1, according to an assembly more particularly illustrated in Figure 3 described below.
  • a bypass line 13 Between the input R1 and the output R2 of the radiator 9 is provided a bypass line 13, the connection between this and the pipe 12 downstream of the outlet R2 being produced by a second mixer thermostatic M2.
  • first part 7 of circuit 6 is advantageously arranged to include a series of transverse conduits 14, extending between the heads of the cylinders 4, inside the walls of the cylinder head 3.
  • Figure 3 illustrates more specifically how produced and controlled by the first mixer thermostatic M1, the connection between the S2 output of the second part 8 of the cooling circuit, the outlet S12 of the corresponding channel, coming from the first part 7, and line 11 back to the entrance R1 from radiator 9 or bypass line 13.
  • the assembly uses a drawer hydraulic 15, generally cylindrical in shape, suitable for slide inside a hollow guide sleeve 16 into which the outputs S2 and S12 open. These outputs are separated from each other, depending on the direction of the axis of the guide sleeve, by a distance which corresponds substantially to the length of the drawer, so that depending on the position relative of the latter in the folder, the S2 output can be fully closed when the S12 output is fully open or vice versa, the drawer may well heard occupying any intermediate position by adjusting the relative flow rates of the cooling from these two outputs respectively, flowing to return line 11.
  • the hydraulic slide 15 is controlled by means of a thermostatic element 17, in itself known in the technical, with a fixed body 18 inside which houses a block 19 of an expandable material appropriate.
  • this block expands or retracts and acts through a diaphragm 20 and possibly a thrust pad 21 on a movable piston 22, through a guide 23 provided in the body, this piston 22 resting on its opposite end on a shoulder 24 integral with the drawer 15.
  • Element 17 used in either of the two thermostatic mixers is chosen by construction of so as to present a set point corresponding to a predetermined temperature, only above which occurs the displacement of the hydraulic slide.
  • the setpoint thresholds of the first and of the respectively second mixers M1 and M2 are generally different and by convention identified in the following under the references T1 and T2.
  • the threshold T1 is less than threshold T2.
  • the entry E1 of the fluid in the first part 7 of the circuit is arranged on the side admission into cylinder head 3, outlet Si being on the side exhaust, the opposite sides being joined by the transverse conduits 14, while the inlet E2 and the output S2 of the second part 8 are both provided on the exhaust side, the circuit profile in this second part corresponding substantially to a hair pin.
  • the fluid used is usually of water, possibly with appropriate additives as is well known in the art of setting work of these circuits for cooling a internal combustion engine.
  • Water from the radiator and circulated by pump 10 enters the first part 7 of the circuit 6 at the entrance E1 thereof, provided on the admission side in cylinder head 3, preferably one or the other of its ends, on the distribution side as shown in Figures 1 and 2, or if necessary opposite, on the side clutch.
  • the water thus sweeps the entire wall of the cylinder head in the face of it corresponding to the admission, so longitudinal as well as transverse between the heads cylinders 4 thanks to the transverse conduits 14, in allowing efficient cooling of the usual organs provided at this location, in particular the candles and / or fuel injectors.
  • the water can be conveyed, in whole or in part as the case may be, either towards the input E2 of the second part 8 of the circuit 6, either directly to return line 11 through thermostatic mixer M1 via channel S12, whether or not cooling the cylinder block 2 by the hairpin path provided in the wall of this last.
  • the control of the mixer M1 is carried out by its element thermostatic 17 as mentioned above, in function of the setpoint T1, therefore of the level of the water temperature.
  • the mixer M1 adapts its opening so that the water flow is distributed between inlet E2 in the second part 8 of the circuit in the wall of the block cylinders and the outlet S12 as before;
  • the collected water returns, either to radiator 9, i.e., by-pass line 13 and the second mixer M2, directly to the pump circulation 10 which returns it to entrance E1 of the first part, this depending on the value setpoint T2 set for the triggering of the element thermostat of this second mixer.
  • the thermostatic mixer M1 is controlled to allow the regulated circulation of water in the second part 8 of the circuit, downstream of the first. If, during engine temperature drops to again, the mixer M1 will play in reverse, limiting or even canceling traffic in the second part of the circuit.
  • the device makes it possible to avoid accidental overheating thanks to the second M2 mixer, whose setpoint temperature T2 is preferably chosen higher than the temperature T1 of the first, in according to the case, either direct circulation by pump 10, which is a passage of all or part of the flow by the radiator 9, making it possible to reduce the temperature of this water to below the set value T2 for which the direct circuit is again set up artwork.
  • the device thus produced, because it dissociates the two-part cooling circuit arranged in series, interesting for one the breech always cooled, and for the other the cylinder block whose cooling is continuously adjusted, allows to obtain permanent control of the temperature in this block and, at low loads, reduce very sensitive to polluting emissions of combustion gases.
  • the cooler water supplied by the pump circulating first in the cylinder head on the intake side in addition to ensures efficient cooling of sensitive organs arranged in this place such as the injectors fuel, does not heat this cylinder head, since this water is not yet thermally charged.
  • the mass flow of gases through the admission is favored, that these gases are constituted by clean air, by a mixture of air and burnt gases, or by burnt gases alone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP19970401370 1996-06-24 1997-06-16 Dispositif de refroidissement d'un moteur à combustion interne Expired - Lifetime EP0816651B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9607815 1996-06-24
FR9607815A FR2750164B1 (fr) 1996-06-24 1996-06-24 Dispositif de refroidissement d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0816651A1 EP0816651A1 (fr) 1998-01-07
EP0816651B1 true EP0816651B1 (fr) 2001-11-07

Family

ID=9493345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970401370 Expired - Lifetime EP0816651B1 (fr) 1996-06-24 1997-06-16 Dispositif de refroidissement d'un moteur à combustion interne

Country Status (4)

Country Link
EP (1) EP0816651B1 (es)
DE (1) DE69707980T2 (es)
ES (1) ES2164311T3 (es)
FR (1) FR2750164B1 (es)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2562379A1 (de) 2011-08-23 2013-02-27 Ford Global Technologies, LLC Kühlmittelkreislauf
EP2562378A1 (de) 2011-08-23 2013-02-27 Ford Global Technologies, LLC Strategie zum Betreiben eines getrennten Kühlmittelkreislaufs
US8739745B2 (en) 2011-08-23 2014-06-03 Ford Global Technologies, Llc Cooling system and method

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19803885B4 (de) * 1998-01-31 2013-02-07 Bayerische Motoren Werke Aktiengesellschaft Kühlkreisanordnung für eine flüssigkeitsgekühlte Brennkraftmaschine
DE19803884A1 (de) * 1998-01-31 1999-08-05 Bayerische Motoren Werke Ag Flüssigkeitsgekühlte Brennkraftmaschine mit einem Kühlkreislauf mit zumindest einer Pumpe
JP3354519B2 (ja) * 1999-03-31 2002-12-09 本田技研工業株式会社 エンジンの冷却構造
DE10021525A1 (de) 2000-05-03 2001-11-15 Porsche Ag Kühlkreislauf für eine mehrzylindrige Brennkraftmaschine
DE10219481A1 (de) * 2002-04-30 2003-11-20 Audi Ag Verbrennungsmotor mit einem Zylinderkurbelgehäuse, mit einem Zylinderkopf und miteinem Kühlwasserkreislauf und Verfahren zum getrennten Kühlen des Zylinderkurbelgehäuses und des Zylinderkopfs, mit einem Kühlwasserkreislauf und einer gemeinsamen Kühlwasserpumpe
EP1900919B1 (de) * 2006-09-13 2011-03-02 Ford Global Technologies, LLC Kühlmittelkreislauf
DE102008015002B4 (de) 2008-03-19 2024-04-25 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kühlung des Zylinderkopfes und des Kurbelgehäuses einer Brennkraftmaschine
DE112008003840B4 (de) * 2008-05-31 2019-06-19 FEV Europe GmbH Kühlungsvorrichtung, Kühlkreislauf und Kühlungsverfahren für einen Verbrennungsmotor
FR2934317B1 (fr) * 2008-07-28 2011-04-15 Peugeot Citroen Automobiles Sa Dispositif et procede de refroidissement d'un moteur a combustion interne par circulation inversee
FR2934319B1 (fr) * 2008-07-28 2011-11-18 Peugeot Citroen Automobiles Sa Dispositif de refroidissement d'un moteur a combustion interne par circulation inversee
JP5903263B2 (ja) * 2011-03-31 2016-04-13 本田技研工業株式会社 水冷式ｖ型エンジン
JP6040658B2 (ja) * 2012-09-14 2016-12-07 日産自動車株式会社 内燃機関の冷却装置
US9140176B2 (en) 2013-01-29 2015-09-22 Ford Global Technologies, Llc Coolant circuit with head and block coolant jackets connected in series
CN204200337U (zh) 2013-07-03 2015-03-11 福特环球技术公司 液冷式内燃发动机
AT514793B1 (de) * 2013-09-16 2015-06-15 Avl List Gmbh Kühlsystem für eine Brennkraftmaschine
AT518537B1 (de) * 2016-06-09 2017-11-15 Avl List Gmbh Brennkraftmaschine
SE540433C2 (en) * 2017-01-26 2018-09-18 Scania Cv Ab A cooling system for cooling a combustion engine and a vehicle comprising such a cooling system
CN106894877A (zh) * 2017-03-29 2017-06-27 安徽江淮汽车集团股份有限公司 一种高低温分流式发动机冷却系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1187952B (it) * 1986-02-20 1987-12-23 Fiat Auto Spa Circuito di raffreddamento per motori a combustione interna
JPH07101006B2 (ja) * 1987-02-06 1995-11-01 マツダ株式会社 水冷式エンジンの冷却装置
FR2660694B1 (fr) * 1990-04-05 1992-07-31 Peugeot Moteur a combustion interne comprenant un circuit de refroidissement perfectionne.
FR2660967B1 (fr) * 1990-04-11 1992-08-14 Peugeot Moteur a combustion interne a circuit de refroidissement perfectionne.
GB2286039A (en) * 1994-01-25 1995-08-02 Ford Motor Co Engine cooling system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2562379A1 (de) 2011-08-23 2013-02-27 Ford Global Technologies, LLC Kühlmittelkreislauf
EP2562378A1 (de) 2011-08-23 2013-02-27 Ford Global Technologies, LLC Strategie zum Betreiben eines getrennten Kühlmittelkreislaufs
US8739745B2 (en) 2011-08-23 2014-06-03 Ford Global Technologies, Llc Cooling system and method

Also Published As

Publication number Publication date
FR2750164A1 (fr) 1997-12-26
EP0816651A1 (fr) 1998-01-07
DE69707980D1 (de) 2001-12-13
FR2750164B1 (fr) 1998-09-11
DE69707980T2 (de) 2002-04-04
ES2164311T3 (es) 2002-02-16

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