WO2024115949A1 - Pression d'air active pour un système de refroidissement - Google Patents

Pression d'air active pour un système de refroidissement Download PDF

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Publication number
WO2024115949A1
WO2024115949A1 PCT/IB2022/061604 IB2022061604W WO2024115949A1 WO 2024115949 A1 WO2024115949 A1 WO 2024115949A1 IB 2022061604 W IB2022061604 W IB 2022061604W WO 2024115949 A1 WO2024115949 A1 WO 2024115949A1
Authority
WO
WIPO (PCT)
Prior art keywords
coolant
gas
expansion tank
circuit
pressurized air
Prior art date
Application number
PCT/IB2022/061604
Other languages
English (en)
Inventor
Rikard HULTHÉN
Katarina Jemt
Edvard MADOUAS
Original Assignee
Volvo Truck Corporation
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 Truck Corporation filed Critical Volvo Truck Corporation
Priority to PCT/IB2022/061604 priority Critical patent/WO2024115949A1/fr
Publication of WO2024115949A1 publication Critical patent/WO2024115949A1/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0005—Degasification of liquids with one or more auxiliary substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0036—Flash degasification
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • 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
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/18—Indicating devices; Other safety devices concerning coolant pressure, coolant flow, or liquid-coolant level
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04029—Heat exchange using liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04044—Purification of heat exchange media
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane

Definitions

  • the disclosure relates generally to vehicle cooling systems.
  • the disclosure relates to an active air pressure for a coolant system.
  • the disclosure can be applied in heavy-duty vehicles, such as trucks, buses, and construction equipment.
  • trucks, buses, and construction equipment such as trucks, buses, and construction equipment.
  • the disclosure may be described with respect to a particular vehicle, the disclosure is not restricted to any particular vehicle.
  • FCS Fuel cell stack
  • ICE internal combustion engine
  • Some vehicles have multiple coolant systems.
  • air and other gasses are undesirable and may reduce system performance.
  • each coolant circuit flows coolant through an expansion tank at the highest position of the cooling system, where gas bubbles in the fluid can be separated due to gravity and removed from the cooling system as illustrated in Figure 1.
  • gas bubbles in the fluid can be separated due to gravity and removed from the cooling system as illustrated in Figure 1.
  • it will have an effect on the coolant temperature in the coolant systems. For instance, a coolant circuit that needs to keep cool gets hotter because of deairation flow from a hot running circuit mixing in the coolant expansion tank..
  • a coolant expansion tank for a vehicle cooling system includes a coolant side having coolant.
  • the coolant expansion tank further includes a first gas port on the coolant side for receiving first gas comprising gas bubbles separated from coolant in a first coolant circuit by a first gas separator, the first gas contributing to air pressure on the coolant in the coolant side.
  • the coolant expansion tank further includes at least one second gas port on the coolant side for receiving second gas comprising gas bubbles separated from coolant in at least one second coolant circuit by at least one second gas separator, the second gas contributing to air pressure on the coolant in the coolant side.
  • the coolant expansion tank further includes a pressurized air side having pressurized air to pressurize the coolant in the coolant side to a set pressure; the pressurized air side have a port for receiving pressurized air from a pressure regulator.
  • the first aspect of the disclosure may seek to prevent injected air from oxidizing coolant in the coolant circuits.
  • a technical benefit may include using one coolant expansion tank for multiple coolant circuits of a vehicle where coolant exposed to air inside the coolant expansion tank is not shared with any of the coolant circuits.
  • the first gap separator is connected to the first gas port and the at least one second gas separator is connected to the second gas port.
  • a technical benefit may include using a single coolant expansion tank for multiple coolant circuits.
  • the first gas separator and the second gas separator are integrated to the coolant side of the coolant expansion tank.
  • a technical benefit may include using a single coolant expansion tank for multiple coolant circuits.
  • the first gas separator receives from components of the first coolant circuit coolant requiring deairation at a first gas separator input port, separates first gas from the coolant requiring deairation and outputs deairated coolant to the first coolant circuit at a first gas separator out port while outputting the first gas without any coolant therein at a first gas separator gas port towards the coolant expansion tank and the at least one second gas separator receives from components of the second coolant circuit coolant requiring deairation at a second gas separator input port and outputs deairated coolant to the second coolant circuit at a second gas separator out port while outputting the second gas without any coolant therein at a second gas separator gas port to the coolant expansion tank.
  • a technical benefit may be the coolant expansion tank never receives
  • the coolant side has a first coolant chamber for a first coolant circuit and at least one second coolant chamber for at least one second coolant fluid circuit where the coolant expansion tank has a divider separating coolant in the first coolant chamber from coolant in the at least one second coolant chamber.
  • a technical benefit may include isolating the first coolant circuit from the at least one second coolant circuit for when the coolant circuits have to be isolated from each other.
  • the coolant expansion tank has a wall between the pressurized air side and the coolant side, the wall having a transfer channel for transferring air from the pressurized air side to the coolant side to pressurize the coolant.
  • a technical benefit may include using a single coolant expansion tank for multiple coolant circuits and eliminating any need for bellows.
  • the transfer channel has a first opening proximate a bottom of pressurized air side and a second opening proximate a top of the coolant side.
  • a technical benefit may include enabling pressurized air from the air side to flow to the coolant side to pressurize the coolant.
  • the pressure regulator is integrated to the coolant expansion tank.
  • a technical benefit may include reducing the number of air lines in the vehicle cooling system.
  • a Teflon membrane is between the pressurized air side and the pressure regulator.
  • a technical benefit may include letting air/hydrogen be released while preventing water vapor from entering the air side.
  • a coolant system for a vehicle cooling system includes a coolant expansion tank.
  • the coolant expansion tank includes a coolant side that includes a first gas port for receiving first gas comprising gas bubbles separated from coolant in a first coolant circuit by a first gas separator, the first gas contributing to air pressure on the coolant in the coolant side; at least one second gas separation port for receiving second gas comprising gas bubbles separated from coolant in a second coolant circuit by a second gas separator, the second gas contributing to air pressure on the coolant in the coolant side; and a pressurized air side configured to pressurize the coolant in the coolant side.
  • the coolant system further includes a pressure regulator configured to provide pressurized air to the pressurized air side.
  • the coolant system further includes the first gas separator configured to receive first cooling fluid from the first coolant circuit requiring deairation and provide the gas bubbles separated from the first cooling fluid to the first gas separation port of the coolant expansion tank.
  • the coolant system further includes the at least one second gas separator configured to receive from the at least one second coolant circuit second coolant requiring deairation and provide the gas bubbles separated from the second coolant to the at least one second gas separation port of the coolant expansion tank.
  • the second aspect of the disclosure may seek to seek to prevent injected air from oxidizing coolant in the coolant circuits.
  • a technical benefit may include using one coolant expansion tank for multiple coolant circuits of a vehicle where coolant exposed to air inside the coolant expansion tank is not shared with any of the coolant circuits.
  • the coolant system further includes a first coolant chamber for the first coolant circuit; a second coolant chamber for the second coolant fluid circuit; and a divider separating coolant in the first coolant chamber from coolant in the second coolant chamber.
  • a technical benefit may include isolating the first coolant circuit from the at least one second coolant circuit for when the coolant circuits have to be isolated from each other.
  • the first gas separator and the at least one second gas separator are integrated into the coolant side such that the gas separated from coolant in the first coolant circuit and the at least one second coolant circuit enters the coolant side and contributes to air pressure pressurizing the coolant on the coolant side.
  • a technical benefit may include using a single coolant expansion tank for multiple coolant circuits.
  • the pressure regulator is further configured to: release air to lower air pressure in the coolant system when air pressure rises above a first threshold; and add air to increase air pressure in the coolant system when air pressure falls below a second threshold.
  • a technical benefit may include keeping the air pressure on the coolant on the coolant side at a set point.
  • the coolant system further includes a wall in the coolant expansion tank separating the coolant side from the pressurized air side in the coolant expansion tank, the wall having a transfer channel that transfers air from the pressurized air side to the coolant side.
  • a technical benefit may include using a single coolant expansion tank for multiple coolant circuits and eliminating any need for bellows.
  • the transfer channel has a first opening proximate a bottom of the pressurized air side and a second opening proximate a top of the coolant side, wherein pressurized air flows through the transfer channel to provide pressurized air to coolant in the coolant side.
  • a technical benefit may include using a single coolant expansion tank for multiple coolant circuits and eliminating any need for bellows.
  • one of the first coolant circuit and the at least one second coolant circuit is a hot coolant circuit and an other of the first coolant circuit and the at least one second coolant circuit is a cold coolant circuit.
  • a technical benefit may be the coolant expansion tank does not receive coolant from either of the hot coolant circuit and the cold coolant circuit thereby allowing one coolant expansion tank to be used for a hot coolant circuit and a cold coolant circuit.
  • a Teflon membrane is between the pressurized air side and the pressure regulator.
  • a technical benefit may include letting air/hydrogen be released while preventing water vapor from entering the air side.
  • a method of degassing coolant in a vehicle cooling system having a first cooling circuit and a second cooling circuit includes receiving pressurized air at a pressurized air side of a coolant expansion tank from a pressure regulator.
  • the method includes pressurizing coolant in a coolant side of the coolant expansion tank using the pressurized air.
  • the method includes receiving, on the coolant side, first gas comprising gas bubbles separated from first coolant in the first coolant circuit by a first gas separator, the first gas contributing to air pressure on the coolant in the coolant side.
  • the method includes receiving, on the coolant side, second gas comprising gas bubbles separated from second coolant in the at least one second coolant circuit by at least one second gas separator, the second gas contributing to air pressure on the coolant in the coolant side, the first coolant circuit and the at least one second coolant circuit isolated from each other.
  • the second aspect of the disclosure may seek to seek to prevent injected air from oxidizing coolant in the coolant circuits.
  • a technical benefit may include using one coolant expansion tank for multiple coolant circuits of a vehicle where coolant exposed to air inside the coolant expansion tank is not shared with any of the coolant circuits.
  • the method further includes releasing air to lower air pressure in the coolant system when air pressure rises above a first threshold and adding pressurized air to increase air pressure in the coolant system when air pressure falls below a second threshold.
  • a technical benefit may include keeping the air pressure on the coolant on the coolant side at a set point.
  • the method further includes providing first coolant fluid having first gas within the first coolant fluid requiring deairation to the first gas separator, the first gas separator having a first round interior wall, wherein providing the first cooling fluid comprises directing the first coolant fluid having gas toward the first round interior wall such that inertia of the first cooling fluid having gas causes the first cooling fluid to move around the first round interior wall in a vortex to press the first cooling fluid against the first round interior wall, wherein pressure of the first cooling fluid against the first round interior wall causes the first gas to move toward a center of the first gas separator and be vented out a top of the first swirl pot into the coolant side; and providing second coolant fluid having second gas within the second coolant fluid requiring deairation to the at least one second separator, the at least one second separator having a second round interior wall, wherein providing the second cooling fluid comprises directing the second coolant fluid having gas toward the second round interior wall such that inertia of the second cooling fluid having gas causes the second cooling fluid to
  • Figure 1 is an illustration of an example of a conventional cooling system where cooling circuits are completely isolated and coolant enters the expansion tanks according to one example.
  • Figure 2 is an illustration of a cooling system where gas separators for multiple coolant circuits are integrated into a single coolant expansion tank form multiple coolant circuits according to an example.
  • Figure 3 is an illustration of a coolant expansion tank of a cooling system according to one example.
  • Figure 4 is an illustration of a coolant expansion tank according to another example.
  • Figure 5 is an illustration of a coolant expansion tank according to a further example.
  • Figures 6-8 are flowcharts illustrating operations of a colling system according to examples.
  • Figure 9 is another view of a coolant system according to an example.
  • the cooling system 200 has a coolant expansion tank 202 having a coolant side 204 having coolant and a pressurized air side 206.
  • the pressurized air side 206 has pressurize air to pressurize the coolant in the coolant side 204 to a set pressure.
  • the pressurized air side 206 has a port 226 for receiving pressurized air from a pressure regulator 228, which is configured to provide pressurized air to the pressurized air side 206.
  • a pressure cap can be used instead of a pressure regulator 228 where control of the system pressure can be relaxed.
  • the coolant expansion tank 202 also includes a first gas port on the coolant side 204 for receiving first gas 212, typically in the form of gas bubbles 214, separated from coolant in a first coolant circuit 216 by a first gas separator 218, the first gas 212 contributing to air pressure on the coolant in the coolant side 204.
  • the first gas separator 218 is configured to receive from the first coolant circuit 216 first coolant requiring deairation, deairate the first coolant requiring deairation, and provide the gas bubbles separated from the first coolant to the first gas port 208 of the coolant expansion tank 202.
  • the coolant expansion tank also includes at least one second gas port 210 on the coolant side for receiving second gas 220, typically in the form of gas bubbles 214 separated from coolant in at least one second coolant circuit 222 by at least one second gas separator 224, the second gas contributing to air pressure on the coolant in the coolant side.
  • the at least one second gas separator 224 is configured to receive from the at least one second coolant circuit 222 second coolant requiring deairation, deairate the second coolant requiring deairation, and provide the gas bubbles 214 separated from the second coolant to the at least one second gas port 210 of the coolant expansion tank 202.
  • the first gas separator 218 is connected to the first gas port 208 and the at least one second gas separator 224 is connected to the at least one second gas port 210.
  • the first gas separator 218 and the at least one second gas separator 224 are integrated to the coolant side 204 of the coolant expansion tank 202 such that the first gas 212 separated from coolant in the first coolant circuit 216 and the second gas 220 separated from coolant in the at least one second coolant circuit 222 enters the coolant side 204 of the coolant expansion tank 202 and contributes to air pressure pressurizing the coolant on the coolant side 204 of the coolant expansion tank 202.
  • first coolant circuit 216 and one second coolant circuit 222 there may be multiple coolant circuits with each coolant circuit having a gas separator.
  • gas separators are not integrated into the coolant expansion tank 202, there can be multiple gas separator gas ports associated with multiple gas separators connected to a same gas port of the coolant expansion tank 202. This can be done because no coolant of any of the coolant circuits flows through the coolant expansion tank 202. For example, if there is a coolant circuit that is used as a back-up coolant circuit or is only used in specific situations, then it may not make sense to have a separate gas port on the coolant expansion tank for this coolant circuit.
  • the gas separator for such a coolant circuit can separate the gas from coolant in the coolant circuit and the gas can be routed to a gas port on the coolant expansion tank that is shared with one or more other coolant circuits.
  • the first gas separator 218 receives from components 230 of the first coolant circuit 216 coolant requiring deairation at a first gas separator input port 232, separates first gas from the coolant requiring deairation and outputs deairated coolant to the first coolant circuit 216 at a first gas separator out port 234 while outputting the first gas 212 without any coolant therein at a first gas separator gas port 236 towards the coolant expansion tank 202.
  • the at least one second gas separator 224 receives from components 238 of the at least one second coolant circuit 222 coolant requiring deairation at a second gas separator input port 240 and outputs deairated coolant to the at least one second coolant circuit 222 at a second gas separator out port 242 while outputting the second gas 220 without any coolant therein at a second gas separator gas port 244 to the coolant expansion tank 202.
  • Pump 246 and pump 248 pump coolant through the first coolant circuit 216 and the at least one second coolant circuit, respectively. Note that the cooling line from a gas separator to a coolant circuit can be angled downward to further prevent circulation of coolant through the coolant expansion tank.
  • a Teflon membrane 250 is between the pressurized air side 206 and the pressure regulator 228.
  • the Teflon membrane 250 allows air/hydrogen to be released or added while preventing water vapor from entering the pressurized air side 206.
  • the pressure regulator 228 in some aspects may receive air from the braking system 252 of the vehicle.
  • the air In fuel cell stack (FCS) vehicles, the air may come from compressors in the FCS cooling system of the FCS vehicle.
  • FCS fuel cell stack
  • the pressure regulator 228 is configured to release air to lower air pressure in the coolant system when air pressure rises above a first threshold and add pressurized air to increase air pressure in the coolant system when air pressure falls below a second threshold.
  • Figure 4 illustrates an example where the coolant circuits are separated from each other.
  • the coolant side 204 of the coolant expansion tank 202 has a first coolant chamber 400 for the first coolant circuit 216 and at least one second coolant chamber 402 for the at least one second coolant circuit 222.
  • a divider 404 separates coolant in the first coolant chamber 400 from coolant in the at least one second coolant chamber 402.
  • Figure 5 illustrates another example where the coolant circuits can be separated from each other.
  • the example of Figure 5 does not need any bellows or other membranes between air and the coolant to operate.
  • a wall 500 is between the pressurized air side 206 and the coolant side 204, where the wall 500 has a transfer channel 502 for transferring air from the pressurized air side 206 to the coolant side 204 to pressurize the coolant.
  • the transfer channel has a first opening 504 proximate a bottom 506 of the pressurized air side 206 of the coolant expansion tank 202 and a second opening 508 proximate a top 510 of the coolant side 204 of the coolant expansion tank 202.
  • one of the first coolant circuit 216 and the at least one second coolant circuit 222 is a hot coolant circuit and an other of the first coolant circuit 216 and the at least one second coolant circuit 222 is a cold coolant circuit.
  • the first coolant circuit 216 may be a cold coolant circuit and the at least one second coolant circuit 222 may be a hot coolant circuit.
  • FIG. 6 is a flowchart of operations 600 for degassing coolant in a vehicle cooling system having a first cooling circuit and at least one second cooling circuit according to some aspects.
  • the operations 600 include receiving pressurized air at a pressurized air side 206 of a coolant expansion tank 202 from a pressure regulator 228 (Block 601).
  • the operations 600 further include pressurizing coolant in a coolant side 204 of the coolant expansion tank 202 using the pressurized air (Block 603)
  • the operations 600 further include receiving, on the coolant side 204, first gas 212 comprising gas bubbles 214 separated from first coolant in the first coolant circuit 216 by a first gas separator 218, the gas bubbles 214 contributing to air pressure on the coolant in the coolant side 204 (Block 605).
  • the operations 600 further include receiving, on the coolant side 204, second gas 220 comprising gas bubbles 214 separated from second coolant in the at least one second coolant circuit 222 by at least one second gas separator 224, the second gas 220 contributing to air pressure on the coolant in the coolant side 204, the first coolant circuit 216 and the at least one second coolant circuit 222 isolated from each other (Block 607).
  • FIG 7 is a flowchart of operations 700 for degassing coolant in a vehicle cooling system having the first cooling circuit and the at least one second cooling circuit according to some aspects.
  • the operations 700 include reducing air pressure on the coolant side 204 responsive to air pressure rising above a threshold level by releasing air via the pressure regulator 228 (Block 701).
  • the operations 700 include adding pressurized air via the pressure regulator 228 to increase air pressure on the coolant side 204 when air pressure falls below a second threshold (Block 703).
  • FIG 8 is a flowchart of operations 800 for receiving the first gas and receiving the second gas according to some aspects.
  • the operations 800 include providing first coolant fluid having first gas 212 within the first coolant fluid requiring deair ation to the first gas separator 218, the first gas separator 218 having a first round interior wall 254, wherein providing the first cooling fluid comprises directing the first coolant fluid having gas toward the first round interior wall 254 such that inertia of the first cooling fluid having gas causes the first cooling fluid to move around the first round interior wall 254 in a vortex to press the first cooling fluid against the first round interior wall 254, wherein pressure of the first cooling fluid against the first round interior wall 254 causes the first gas to move toward a center of the first gas separator and be vented out a top of the first gas separator 218 into the coolant side 204 of the coolant expansion tank 202 (Block 801).
  • the operations 800 further include providing second coolant fluid having second gas within the second coolant fluid requiring deairation to the at least one second gas separator (224), the at least one second gas separator 224 having a second round interior wall 256, wherein providing the second cooling fluid comprises directing the second coolant fluid having gas toward the second round interior wall 256 such that inertia of the second cooling fluid having gas causes the second cooling fluid to move around the second round interior wall 256 in a vortex to press the second cooling fluid against the second round interior wall 256, wherein pressure of the second cooling fluid against the second round interior wall 256 causes the second gas to move toward a center of the at least one second gas separator 224 and be vented out a top of the at least one second gas separator 224 into the coolant side 204 of the coolant expansion tank 202.
  • Figure 9 is another view of a coolant system, according to another example.
  • Figure 9 illustrates a coolant expansion tank 202 for a vehicle cooling system.
  • the coolant expansion tank 202 includes a coolant side 204 having coolant.
  • the coolant expansion tank 202 further includes a first gas port 208 on the coolant side 204 for receiving first gas 212 comprising gas bubbles 214 separated from coolant in a first coolant circuit 216 by a first gas separator 218, the first gas 212 contributing to air pressure on the coolant in the coolant side 204;
  • the coolant expansion tank 202 further includes at least one second gas port 210 on the coolant side for receiving second gas 220 comprising gas bubbles 214 separated from coolant in at least one second coolant circuit 222 by at least one second gas separator 224, the second gas contributing to air pressure on the coolant in the coolant side 204; and
  • the coolant expansion tank 202 further includes a pressurized air side 206 having pressurized air to pressurize the coolant in the coolant side 204 to a set pressure; the pressurized air side having a port 226 for receiving pressurized air from a pressure regulator 228.
  • the gas separators described herein make it possible to decrease the draw down volume and to use a pressure regulator to inject air when needed to control system pressure.
  • the injected air does not oxidize (age) the coolant to glycolate besides a very small fraction that stays inside the coolant expansion tank 202.
  • Relative terms such as “below” or “above” or “upper” or “lower” or “horizontal” or “vertical” may be used herein to describe a relationship of one element to another element as illustrated in the Figures. It will be understood that these terms and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present.

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Abstract

L'invention concerne un réservoir d'expansion de fluide de refroidissement pour un système de refroidissement de véhicule, ledit réservoir d'expansion de fluide de refroidissement comprenant un côté fluide de refroidissement ayant un fluide de refroidissement. Le réservoir comprend en outre un premier orifice de gaz côté fluide de refroidissement pour recevoir un premier gaz comprenant des bulles de gaz séparées du fluide de refroidissement dans un premier circuit de fluide de refroidissement par un premier séparateur de gaz, le premier gaz contribuant à une pression d'air sur le fluide de refroidissement côté fluide de refroidissement. Le réservoir comprend en outre au moins un second orifice de gaz côté fluide de refroidissement pour recevoir un second gaz comprenant des bulles de gaz séparées du fluide de refroidissement dans au moins un second circuit de fluide de refroidissement par au moins un second séparateur de gaz, le second gaz contribuant à une pression d'air sur le fluide de refroidissement côté fluide de refroidissement. Le réservoir comprend en outre un côté air sous pression ayant de l'air sous pression pour mettre sous pression le fluide de refroidissement côté fluide de refroidissement à une pression définie et présente un orifice pour recevoir de l'air sous pression en provenance d'un régulateur de pression.
PCT/IB2022/061604 2022-11-30 2022-11-30 Pression d'air active pour un système de refroidissement WO2024115949A1 (fr)

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PCT/IB2022/061604 WO2024115949A1 (fr) 2022-11-30 2022-11-30 Pression d'air active pour un système de refroidissement

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PCT/IB2022/061604 WO2024115949A1 (fr) 2022-11-30 2022-11-30 Pression d'air active pour un système de refroidissement

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WO2024115949A1 true WO2024115949A1 (fr) 2024-06-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2905737A1 (fr) * 2006-09-13 2008-03-14 Renault Sas Procede et dispositif pour prechauffer le moteur a combustion interne d'un vehicule automobile
FR2923261A1 (fr) * 2007-11-06 2009-05-08 Renault Sas Vase d'expansion pressurise et moteur a combustion interne comprenant un tel vase d'expansion
EP3301274A1 (fr) * 2016-09-30 2018-04-04 Novares France Circuit de refroidissement pour un véhicule automobile
EP3521584A1 (fr) * 2018-02-01 2019-08-07 MAN Truck & Bus SE Réservoir de compensation pour circuits de refroidissement à différents niveaux de température et addition de pression
WO2020022104A1 (fr) * 2018-07-25 2020-01-30 株式会社デンソー Système de refroidissement de véhicule

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2905737A1 (fr) * 2006-09-13 2008-03-14 Renault Sas Procede et dispositif pour prechauffer le moteur a combustion interne d'un vehicule automobile
FR2923261A1 (fr) * 2007-11-06 2009-05-08 Renault Sas Vase d'expansion pressurise et moteur a combustion interne comprenant un tel vase d'expansion
EP3301274A1 (fr) * 2016-09-30 2018-04-04 Novares France Circuit de refroidissement pour un véhicule automobile
EP3521584A1 (fr) * 2018-02-01 2019-08-07 MAN Truck & Bus SE Réservoir de compensation pour circuits de refroidissement à différents niveaux de température et addition de pression
WO2020022104A1 (fr) * 2018-07-25 2020-01-30 株式会社デンソー Système de refroidissement de véhicule

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