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
  • F01P11/029—Expansion reservoirs

Definitions

• the present invention relates to a degassing device and method for motor vehicles. It applies in particular, but not exclusively, to a degassing device for the coolant of a heat engine, particularly for the engines of motor vehicles.
• the coolant conventionally circulating in a cooling circuit of the engine block, is charged with gas.
• gases can be of various origins and consist of: - a combustion gas, generally due to a defect in the cylinder head gasket, water vapor, antifreeze vapor, atmospheric air.
• the degassing box is an essential element for the proper functioning of the engine and also performs other technical functions such as: filling the circuit, a reserve to allow absorption of liquid consumption and / or volume variations due to temperatures and pressures, pressurization of the circuit by a tared plug, visualization of the liquid level.
• the degassing box is an essential element of the engine block first of all concerning the management of the gases circulating in the liquid but also at the level of the above-mentioned technical functions which it must ensure in the first place.
• Patent No. FR 2730272 also describes a degassing box composed of two communicating compartments. The first compartment allows degassing by centrifugation of the upper jet in a cylinder.
• the openings in the lower part of the cylinder do not allow all the turbulence to be contained, thus disturbing the efficiency of degassing.
• the second compartment creates a calm zone to complete the degassing of the liquid. This design does not provide for a lower arrival.
• a degassing device for the coolant of a heat engine in particular for motor vehicle engines, comprising at least one lower compartment into which is brought, via a supply duct. , part of the coolant, and at least one upper compartment into which is brought, by means of another supply duct, another part of said liquid, the compartments each having a different diameter, characterized in that the two compartments are in cylindrical form and in that the compartment having the smallest diameter, called the inside diameter, is protruding inside the compartment with the largest diameter, called the outside diameter.
• the above-mentioned internal diameter will be chosen according to the flow rate of the liquid to be degassed.
• the supply conduits of the two above-mentioned compartments will be respectively oriented perpendicular to the two compartments, lower and upper.
• the lower compartment is supported on the outer casing by means of a base, constituted for example by a plurality of feet.
• the degassing device will include an outer casing in which the two above-mentioned compartments are housed.
• the envelope of the degassing device will be in spherical form; this envelope can be composed of at least two parts, for example identical.
• the two parts forming the outer envelope can be heat-sealed, for example at the sidewalk or part of their edges.
• the envelope will have a diameter corresponding to a desired volume, for example at least equal to the total volume of liquid to be degassed.
• the outer envelope as well as the two above-mentioned compartments are molded thermoplastics, obtained for example by injection.
• the envelope and the two compartments may be made of propylene.
• the degassing device will include an outlet duct for the coolant so that the latter, once degassed, can be evacuated by the effect of its own weight, that is to say by gravitation.
• the two compartments will extend vertically, substantially along a central axis of the outer envelope.
• the two compartments will extend vertically, substantially near one of the edges of the outer envelope.
• the invention also relates to a degassing process for the coolant of a heat engine, in particular for motor vehicle engines, by means of at least one lower cylindrical compartment into which is brought, via a conduit. supply, part of the coolant and at least one upper cylindrical compartment into which is brought, via another supply duct, another part of said liquid, the compartments each having a different diameter, the two compartments being housed in an outer envelope, the compartment having the smallest diameter, called the inside diameter, being protruding inside the compartment with the largest diameter, called the outside diameter, characterized in that it comprises the steps of: displacement coolant tangential to the wall of said compartments in order to avoid the emulsion of the li what, a step of tranquilizing the coolant, degassing the coolant tranquilized by gravity.
• the tangential displacement of the coolant in each of the compartments takes place in the opposite direction.
• the invention therefore makes it possible to improve the degassing in the cooling liquid, or fluid, in all the operating phases of a motor vehicle engine.
• the device according to the invention by virtue of its compactness, is easily integrated into the constraints of space requirement of the engine behavior and makes it possible to achieve, by its particularly simple design, very competitive manufacturing costs.
• the device of the invention makes it possible to integrate several liquid inlets "in the air” and / or "in the submarine".
• FIG. 1 is an overall view of a conventional engine block making it possible to grasp the different elements making it up as well as the different pipes connecting these different elements together;
• Figures 2 and 3 are respectively a vertical sectional view and a horizontal sectional view of a first embodiment of a degassing device according to the invention
• Figures 4 and 5 are respectively a vertical sectional view and a horizontal sectional view of a degassing device according to the invention
• Figures 6 and 7 are two vertical sectional views of a second embodiment of a degassing device according to the invention.
• Figures 8 and 9 are two vertical sectional views of a third embodiment of a degassing device according to the invention.
• Figure 1 depicts a typical cooling circuit.
• the cooling circuit in motor vehicles is mainly composed of a heat engine 1 to be cooled, a pump 2 allowing the circulation of the liquid, radiators 3, 3 ′ ensuring the heat exchange and a box, or device, for degassing 4.
• the liquid to be degassed coming from the radiator 3 ′, enters the degassing device 4 by a supply pipe 5.
• This coolant supply duct 5 is oriented tangentially to a first cylindrical upper compartment 6, thus allowing the liquid to flow along the wall of the compartment 6.
• This cylindrical compartment 6 is protruding in a second compartment lower 7, also cylindrical but with a diameter greater than that of the first compartment 6.
• the first compartment 6 opens in the lower part into a second compartment 7 so that, thanks to the nesting of the two compartments 6 and 7 one inside the other, the turbulences of the coolant remain trapped.
• the respective diameters of the two cylindrical compartments 6 and 7 depend on the flow rate of the liquid to be degassed.
• the second compartment 7 is equipped in the lower part with a base 9, ideally constituted by a plurality of feet positioning in height so that it is always submerged relative to the level of the liquid.
• the lower compartment 7, having a diameter greater than the upper compartment 6, allows the liquid to pour into an outer casing 10 housing the two above-mentioned lower 7 and upper 6 compartments.
• the liquid being tranquilized, degassing can take place by gravity and leave the degassing device through an outlet orifice 11 located in the lower part of the degassing device.
• the degassing device is composed of an upper half-envelope 12, of a lower cylindrical compartment 13 and a lower half-casing 14.
• the upper half-envelope 12 is spherical in shape and is equipped with a supply duct 5 allowing the entry of the liquid to be degassed, opening tangentially to the wall of the upper compartment 6 and on the upper part of an orifice 15 allowing filling the circuit and screwing in a tared plug.
• the upper half-envelope 12 also includes, on its lower edge, a sidewalk 16 to allow heat sealing with the lower half-envelope 14.
• the cylindrical lower compartment 13 is provided with a supply duct 8 allowing the entry of the liquid to be degassed, oriented tangentially to the wall. To position it, this lower compartment is equipped with feet 17 which can be clipped inside the lower half-casing 14.
• the lower half-envelope 14 is equipped with a supply duct 18 also allowing the entry of the liquid to be degassed, coming to be connected to the supply duct 8 of the aforesaid lower compartment 13; the supply duct 18 of the lower half-envelope 14 having a diameter greater than that of the supply duct 8 of the lower compartment 13.
• the half-envelope 14 In its lower part, the half-envelope 14 is provided with an outlet orifice 11 for the liquid to be degassed as well as pins 19 for holding the lower cylindrical compartment in position 13.
• the half-envelope 14 also has on its upper edge , a sidewalk 20 to allow heat sealing with the upper half-envelope 12.
• Figures 7 and 8 show a degassing device according to an alternative embodiment.
• said device comprises an upper half-envelope 21 and a lower half-envelope 22.
• the upper half-envelope 21 is in spherical form and is equipped with a supply conduit 5 for the liquid to be degassed, opening tangentially, or perpendicularly, to the wall of the upper cylindrical compartment 6.
• This upper half-envelope 21 is also equipped with an orifice 15, located on its upper part, allowing the filling of the circuit and the screwing of a tared plug.
• This half-envelope 21 also has on its lower edge, a sidewalk 16 to allow heat sealing with the lower half-envelope 22.
• the lower half-envelope 22 is in spherical form and is equipped with a supply duct 8 for the liquid to be degassed opening tangentially to the wall of the cylindrical lower compartment 7. In its lower part, this lower half-envelope 22 is provided an outlet orifice 11 for the degassed liquid.
• the lower half-envelope 22 also has on its upper edge, a sidewalk 20 to allow heat sealing with the upper half-envelope 21.
• the operation of this degassing device is identical to that of the first degassing device described, however the lower 22 and upper 21 compartments are positioned differently so as to allow production in only two elements.
• the device for degassing is composed of two elements: an upper half-envelope 21 and a lower half-envelope 22.
• the upper half-envelope 21, of spherical shape, is equipped with a conduit 5 for supplying the liquid to be degassed, opening tangentially to the wall of the upper cylindrical compartment 6.
• the upper half-envelope 21 is also equipped with a second cylindrical upper compartment 6 ', for example identical to the first 6. On its upper part, this half-envelope 21 also includes on its lower edge, a sidewalk 16 to allow heat sealing with the lower half-envelope 22.
• the lower half-envelope 22 of spherical shape, is equipped with a supply conduit 8 for the liquid to be degassed, opening tangentially to the wall of a lower cylindrical compartment 7.
• the half-envelope lower 22 includes a second lower cylinder 7 '.
• the lower half-envelope 22 has on its upper edge, a sidewalk 20 to allow heat sealing with the upper half-envelope 21.
• this variant of the degassing device according to the invention is similar to that of the first variant described, however the lower 7 and upper 8 cylindrical compartments are respectively lined 7 'and 8' and the liquid supply conduits 5 and 8 are separated, thus offering the possibility of degassing higher flow rates.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Degasification And Air Bubble Elimination (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
• Processing Of Solid Wastes (AREA)
• Motor Or Generator Cooling System (AREA)
• Manufacture Of Motors, Generators (AREA)
• Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
• Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

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Cited By (1)

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• 2002
  • 2002-06-21 FR FR0207745A patent/FR2841187B1/fr not_active Expired - Fee Related
• 2003
  • 2003-05-02 BR BRPI0311682A patent/BRPI0311682A2/pt not_active IP Right Cessation
  • 2003-05-02 WO PCT/FR2003/001379 patent/WO2004001204A1/fr not_active Ceased
  • 2003-05-02 DE DE60323855T patent/DE60323855D1/de not_active Expired - Lifetime
  • 2003-05-02 AT AT03760716T patent/ATE409802T1/de not_active IP Right Cessation
  • 2003-05-02 AU AU2003249392A patent/AU2003249392A1/en not_active Abandoned
  • 2003-05-02 EP EP03760716A patent/EP1554476B1/de not_active Expired - Lifetime
  • 2003-05-02 CN CNB038145154A patent/CN100335760C/zh not_active Expired - Fee Related

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