EP3746647A1 - Bocal de dégazage pour circuit de refroidissement automobile - Google Patents
Bocal de dégazage pour circuit de refroidissement automobileInfo
- Publication number
- EP3746647A1 EP3746647A1 EP19701366.7A EP19701366A EP3746647A1 EP 3746647 A1 EP3746647 A1 EP 3746647A1 EP 19701366 A EP19701366 A EP 19701366A EP 3746647 A1 EP3746647 A1 EP 3746647A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- heating element
- heat exchange
- jar
- control unit
- 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.)
- Granted
Links
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
-
- 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
-
- 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
- F01P2070/00—Details
- F01P2070/04—Details using electrical heating elements
Definitions
- the subject of the invention is thermal fluid exchange circuits.
- the boiling of a coolant in such a circuit causes premature erosion of the fluid ducts of the circuit, resulting in a risk of leakage of liquid.
- the invention proposes a rapid pressurization of the complete cooling circuit to limit the risk of boiling in the cooling circuit, in particular in the EGR exchangers, and therefore the need for coolant flow rate.
- a heat exchange circuit may include:
- a degassing jar connected to the piping circuit, configured to reserve an expansion volume in which said liquid is surmounted by a volume of gas.
- the volume of gas is preferably configured to allow dilatations of the liquid to be absorbed within the temperature range of use of said liquid.
- the heat exchange circuit is advantageously further configured so that it can be closed vis-à-vis the external environment so as to be sealed to said liquid and said gas, while permitting circulation of the liquid in a loop from the degassing jar to the jar degassing, preferably through at least one heat exchanger.
- the degassing jar is equipped with a heating element, the heating element being placed so as to remain out of the liquid under the intended conditions of use, and being configured to directly heat the gas overcoming the liquid, preferably without be in contact with the liquid.
- At least the heating element is configured for, over the range of use of the circuit of exchange, provoke when activated, a faster rise in the temperature of the gas that it causes the temperature of the liquid circulating in the exchange circuit to rise.
- the heating element can typically comprise an electrical resistance, but other types of heating elements are possible, for example a heat exchanger with a second circulation of a second fluid.
- the jar may include a closure cap in the upper part of the jar, the cap carrying the heating element.
- At least a portion of the heating element is placed at a portion of the wall of the jar distinct from the plug.
- the circuit may further include: a heat exchanger traversed by the liquid;
- the liquid pressure sensor is closer to the heat exchanger than the degassing jar.
- the electronic control unit can be configured to actuate the heating element when the pressure sensor transmits a measurement deviation from a pressure setpoint, or when the boiling is detected via a predefined profile of the heating element. pressure waves.
- high-frequency pressure waves may be indicative of a beginning of boiling of the liquid, which it is desired to avoid, in order to limit the erosion of the thermal exchange circuit by cavitation.
- the circuit may further include a liquid temperature sensor or estimator connected to the control unit.
- the liquid pressure sensor is closer to the heat exchanger than the degassing jar.
- the temperature estimator may comprise a temperature sensor, placed for example on the liquid circuit.
- the electronic control unit can be configured to initiate heating by the heating element if a pair of values (temperature pressure) obtained with the aid of the temperature estimator and with the aid of the pressure sensor is on a predefined side of a recorded threshold curve, on the higher temperature side and lower pressures with respect to the threshold curve.
- the threshold curve may correspond to a threshold curve of boiling of the liquid.
- the electronic control unit can be configured to, when activating the heating element, cause the sending of a constant heating power of predefined level, during a preset heating time.
- the heating element can thus transmit a given quantity of energy before a new evaluation by the control unit, and before, if necessary, triggering the sending of another equivalent quantity of energy if the risk of boiling of the liquid remains effective.
- the electronic control unit can be configured to estimate the position of a pair of values (temperature pressure) obtained with the aid of the temperature estimator and the using the pressure sensor, with respect to a mapping comprising a series of threshold curves or comprising a threshold surface, and the control unit can be configured for, during the activation of the heating element, causing the sending at least two different heating powers for at least two different positions of the point on the map.
- the different heating powers can be obtained, on average, for example by sending several successive quantities of energy, each quantity corresponding to the supply of the heating element with the same electrical power for the same duration, the number of quantities and the interval of time separating the quantities, being adapted to obtain on average the desired heating power.
- the different heating powers can be obtained by supplying the heating element, for a predefined duration, to an electrical power which is adapted according to the heating power determined from the mapping.
- FIG. 1 illustrates a heat exchange circuit, more particularly a cooling circuit of an EGR exchanger according to the invention
- FIG. 2 illustrates a degassing jar of another variant embodiment of a heat exchange circuit according to the invention.
- a heat exchange circuit according to the invention comprises a heat exchanger 10 through which a liquid 8, which is fed through lines 2, with a pump 14, the heat exchanger 10 to a degassing jar 3 of the circuit, then back to the heat exchanger 10.
- the liquid 8 passes through at least one second heat exchanger (not shown in FIG. the figures), in order to transfer / respectively recover at least a portion of the calories stored / respectively transferred, at the level of the exchanger 10.
- said second heat exchanger may be a heater that heats a pulsed air to the passenger compartment of the vehicle.
- the jar 3 comprises a closure cap 4.
- the jar 3 is equipped with a heating element, designated by the reference 5 in FIG. In the embodiment of FIG. 1, the heating element is carried by the plug 4.
- the heating element designated by reference 6 in FIG. 2
- the heating element can be carried by walls of the jar, above the level of the liquid 8.
- the degassing jar is sized, and is placed in the thermal circuit so that the liquid 8 present in this jar is surmounted by a gaseous volume 9.
- the heating element here referenced 5
- the heating element is connected to an electronic control unit 7 which triggers and / or which regulates the power supply of the heating element as a function of values, respectively P, T , delivered by a pressure sensor 11 and by a temperature sensor 12.
- the setpoint Qcons sent by the electronic control unit 7 to the heating element 5, is used to trigger a rise in temperature and pressure of the gas volume 9 , therefore a rapid pressurization of the liquid 8, in order to delay the boiling thereof.
- the electronic control unit 7 can for this purpose compare the values P, T to values recorded in a map 13, to determine whether the liquid 8 is in conditions close to boiling, or not.
- the heat exchange circuit 1 may comprise a cooling circuit of a motor (not shown motor) which is connected to the heat exchanger 10. Therefore, the liquid 8 flowing in the degassing jar may be liquid flowing through the vehicle engine to exchange calories.
- the heat exchange circuit equipped with a degassing jar according to the invention makes it possible to tolerate use of the heat transfer liquid at a higher temperature, thus limiting the flow rate thereof, which in the end makes it possible to limit the consumption. in fuel of the vehicle equipped with the heat exchange circuit.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1850650A FR3077332B1 (fr) | 2018-01-29 | 2018-01-29 | Bocal de degazage pour circuit de refroidissement automobile |
| PCT/EP2019/052039 WO2019145550A1 (fr) | 2018-01-29 | 2019-01-29 | Bocal de dégazage pour circuit de refroidissement automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3746647A1 true EP3746647A1 (fr) | 2020-12-09 |
| EP3746647B1 EP3746647B1 (fr) | 2024-01-24 |
Family
ID=61656031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19701366.7A Active EP3746647B1 (fr) | 2018-01-29 | 2019-01-29 | Bocal de dégazage pour circuit de refroidissement automobile |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3746647B1 (fr) |
| CN (1) | CN111727308A (fr) |
| FR (1) | FR3077332B1 (fr) |
| WO (1) | WO2019145550A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2693763B1 (fr) * | 1992-07-17 | 1994-09-02 | Peugeot | Perfectionnements apportés aux circuits de refroidissement des moteurs à combustion interne. |
| SE530868C2 (sv) * | 2007-02-09 | 2008-09-30 | Volvo Lastvagnar Ab | Kylsystem |
| 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 |
| FR2949509B1 (fr) * | 2009-09-03 | 2011-11-25 | Peugeot Citroen Automobiles Sa | Moteur a combustion interne presentant un circuit de refroidissement muni d'un conduit de derivation |
| DE102011108041B4 (de) * | 2011-07-19 | 2022-01-20 | Daimler Ag | Beheizbare Vorrichtung zum Steuern des Systemdrucks in einem Kühlmittelkreislauf für eine Brennkraftmaschine |
| FR2979693B1 (fr) * | 2011-09-06 | 2013-08-23 | Valeo Systemes Thermiques | Dispositif de chauffage electrique pour vehicule automobile, et appareil de chauffage et/ou de climatisation associe |
| CN202789250U (zh) * | 2012-08-27 | 2013-03-13 | 亚普汽车部件股份有限公司 | 一种能控制内部温度的燃油箱 |
-
2018
- 2018-01-29 FR FR1850650A patent/FR3077332B1/fr not_active Expired - Fee Related
-
2019
- 2019-01-29 WO PCT/EP2019/052039 patent/WO2019145550A1/fr not_active Ceased
- 2019-01-29 EP EP19701366.7A patent/EP3746647B1/fr active Active
- 2019-01-29 CN CN201980013771.5A patent/CN111727308A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3077332B1 (fr) | 2020-05-01 |
| WO2019145550A1 (fr) | 2019-08-01 |
| FR3077332A1 (fr) | 2019-08-02 |
| EP3746647B1 (fr) | 2024-01-24 |
| CN111727308A (zh) | 2020-09-29 |
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