EP1113157B1 - Dispositif de régulation du refroidissement d'un moteur thermique de véhicule automobile dans un état de démarrage à chaud - Google Patents
Dispositif de régulation du refroidissement d'un moteur thermique de véhicule automobile dans un état de démarrage à chaud Download PDFInfo
- Publication number
- EP1113157B1 EP1113157B1 EP00128308A EP00128308A EP1113157B1 EP 1113157 B1 EP1113157 B1 EP 1113157B1 EP 00128308 A EP00128308 A EP 00128308A EP 00128308 A EP00128308 A EP 00128308A EP 1113157 B1 EP1113157 B1 EP 1113157B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- fluid
- engine
- threshold
- speed
- 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
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Classifications
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- 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
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives
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- 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
- F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
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- 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
- F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
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- 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
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
- F01P2005/125—Driving auxiliary pumps electrically
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- 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
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
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- 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
- F01P2025/13—Ambient temperature
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- 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
- F01P2025/30—Engine incoming fluid temperature
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- 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
- F01P2025/32—Engine outcoming fluid temperature
-
- 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
- F01P2025/60—Operating parameters
- F01P2025/62—Load
-
- 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
- F01P2025/60—Operating parameters
- F01P2025/66—Vehicle speed
-
- 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
- F01P2037/00—Controlling
- F01P2037/02—Controlling starting
-
- 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
Definitions
- the invention relates to a cooling control device. of a motor vehicle heat engine according to the preamble of claim 1.
- a cooling control device of a motor vehicle heat engine according to the preamble of claim 1.
- Such a device is known from document EP-A-0 965 737.
- the cooling device includes a cooling circuit traversed by a fluid, which is generally of water with antifreeze added.
- This circuit includes a cooling branch containing a cooling radiator associated with a motor-fan unit, as well as a heating branch containing an air heater.
- the radiator cooling is swept by an outside air flow which is set in motion by the speed of the vehicle and / or by the motor-fan unit.
- the cooling branch can also include a pilot valve.
- the heating branch contains an air heater, i.e. a heating radiator which is crossed by an air flow set in motion by a pulser. This air flow is then sent and distributed in the passenger compartment by distribution nozzles appropriate.
- the air heater is part of an installation heating and / or air conditioning with aerothermal parameters adjustable.
- the object of the invention is in particular to overcome the drawbacks supra.
- It aims in particular to regulate the cooling of the heat engine in a hot engine start state, which can also be called restart state.
- the invention provides for this purpose a device according to claim 1.
- the device of the invention first determines whether the engine is in a warm start state and, if this is the case, it controls the pump speed and / or the group speed motor-ventilator under selected conditions, i.e. according to at least one predetermined law.
- the device calculates the speed of the pump (therefore its flow) and the speed of the motor-fan unit, so as to ensure optimal regulation during the duration of this warm start state.
- Means for establishing the warm start state of the engine advantageously comprise means for detecting the operation of the engine, at zero vehicle speed, and means for measuring or estimating a representative temperature of the engine thermal state and compare it to at least one given threshold.
- This temperature representative of the thermal state of the engine is advantageously the temperature of the fluid leaving of the motor.
- the invention advantageously provides that the branch of cooling further includes a pilot operated valve.
- the second means are clean furthermore to adjust this piloted valve according to the fluid temperature.
- the intermediate position of the valve controlled corresponding to a maximum temperature difference, which can be about 10 ° C.
- the first threshold and the second temperature threshold defined previously can, for example, be respectively about 110 ° C and about 50 ° C.
- FIG. 1 shows a device cooling coupled to a vehicle heat engine M automobile.
- This device includes a cooling circuit 1 traversed by a cooling fluid, for example water with an antifreeze, such as glycol.
- a cooling fluid for example water with an antifreeze, such as glycol.
- This fluid can circulate under the action of a pump 2, called “electric pump”, powered by an electric motor variable regime.
- Circuit 1 includes a branch of cooling 3 and a heating branch 4 in which the fluid circulates under the action of the electric pump 2.
- the cooling branch 3 contains a radiator for cooling 5 associated with a motor-fan unit 6, which includes a propeller 7 driven in rotation by a variable speed electric motor.
- Branch 3 contains in addition, upstream of the radiator 5, a controlled valve 8 also called “piloted thermostat", in particular a controlled valve either by a stepper type electric motor or by a heating element.
- the heating branch 4 contains an air heater 9, again called “heating radiator”, part of a installation 10 for heating and / or air conditioning the passenger compartment of the vehicle.
- the radiator 5 is suitable for being traversed by an air flow whose speed depends on the speed of the vehicle and that of of the motor-fan unit.
- the heater 9 is suitable for crossed by an air flow set in motion by a blower (not shown) and suitable for distribution in the passenger compartment by suitable nozzles.
- the device of the invention comprises a control module 11, also called a calculator, which can be produced by example, in the form of a microprocessor, or an ASIC.
- This computer is connected by command lines L1, L2 and L3 respectively to the electric pump 2, to the motor-fan unit 6 and to the piloted valve.
- This calculator determines, according to parameters which will be specified, the Np speed of pump 2 (which determines its flow), the speed Ng of the motor-fan unit 6 and the valve position Pv piloted 8. It takes into account one or more optimization laws contained in memory means.
- the device of the invention aims to regulate the cooling engine in a particular state, called “state of hot start”, abbreviated as EDC, which can also be call restart state.
- EDC state of hot start
- the pump which sets in motion the fluid in the circuit is a pump mechanically coupled to the engine, so that the speed of the pump is proportional to that of the motor. It follows that, in a warm start state, the pump speed is not optimal.
- the motor-fan unit is usually operated as a function of thermal switches, in direct relation to the temperature of the fluid measured in the circuit.
- the computer makes it possible to manage the cooling of the engine in this particular state depending on specific parameters.
- the device of the invention defines a strategy for control of the pump, the motor-fan unit and the piloted valve which calculates, based on certain data input, pump speed, speed of the fan-motor unit and the position of the piloted valve. This strategy complies with the law or the optimization laws of the computer.
- the ambient air temperature Ta is taken outside the vehicle by an appropriate sensor.
- the engine speed Nmot corresponds to the number of revolutions of the engine and is supplied, for example, by a computer injection.
- the engine load Cmot is provided, for example, by the accelerator pedal position, the position of a carburetor throttle, etc.
- the temperature of the fluid leaving the engine Te is supplied by an appropriate temperature sensor.
- the heating position Dch is defined by a value in percentage of maximum heating demand.
- This position can be provided directly by a manual adjustment, or from the temperature of setpoint and interior temperature in the case of a automatic heater / air conditioner.
- this heating position can be between 0% (no heating demand) and 100% (maximum heating demand).
- the computer 11 can also receive input data called "contact” to provide a signal that the engine is running and the vehicle speed is null (vehicle stopped).
- the computer 11 includes calculation means 12 which determine by a comparator 13 if the motor M is in the state EDC hot start. For this, the engine must works, that is to say that its regime exceeds a threshold given, for example 400 rpm, that the speed of the vehicle is zero, and the temperature of the fluid Te is above ambient temperature, i.e. practically greater than a predefined threshold.
- cooling is managed by other computing means 14 which correspond to a normal operating mode, and which do not not part of the invention.
- the computer receives a signal corresponding to the value of the temperature of the fluid Te. It is a value instantaneous which, by hypothesis, is higher than the temperature room.
- this instantaneous value Te is compared first at a first threshold value Te1 which is for example of the order of 110 ° C. This first comparison is made by a comparator 15.
- the calculator takes into account counts the DCH heating demand at a comparator 16.
- Another comparator 17 is provided at the output of the comparator 15. which compares the instantaneous value Te on the one hand with this first threshold Te1 and on the other hand to a second threshold Te2 which is itself less than Te1.
- this threshold Te2 can be of the order of 50 ° C.
- the computer adjusts the position of the piloted valve so that it provides a temperature difference DT which reaches a maximum value (DTmax) having a given value, for example 10 ° C.
- Nsat the saturation regime of the pump which provides a saturation flow in the heater.
- This saturation flow corresponds to the flow of the fluid which allows to obtain 90% of an asymptotic heat flux for a given air flow.
- Figure 3 illustrates the variations in the FT heat flux as a function of the flow of the fluid Qf, the saturation flow being designated by Qsat.
- valve position is adjusted so that the difference in temperature DT between the input and the output of the engine either less than or equal to DTmax, for example 10 ° C as in the previous case.
- the engine is warmed up to that the temperature of the fluid reaches an optimal value.
- the above organization chart defines laws which can be integrated into a computer by means in themselves known which are within the reach of man the job.
- the computer may for example include means of memory with correspondence tables to fix the parameter values as a function of defined quantities.
- the device of the invention thus allows, when a state of hot start is established, manage cooling under optimal conditions by acting on the pump, on the speed of the motor-fan unit and on the position of the piloted valve.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Hybrid Electric Vehicles (AREA)
Description
- soit piloter le groupe moto-ventilateur à un régime minimal si la température du fluide est supérieure à un premier seuil ;
- sinon, stopper le groupe moto-ventilateur si la température du fluide est inférieure à ce premier seuil et supérieure à un deuxième seuil.
- soit piloter la pompe à un régime minimal si la demande de chauffage est nulle ;
- sinon, piloter la pompe en fonction d'un régime de saturation, si la demande de chauffage est positive.
- soit régler la vanne pilotée dans une position intermédiaire fournissant un écart de température donné du fluide entre l'entrée et la sortie du moteur, lorsque la température du fluide est supérieure à un premier seuil ;
- sinon, fermer la vanne pilotée si la température du fluide est inférieure à ce premier seuil et supérieure à un deuxième seuil.
- la figure 1 est un schéma illustrant un moteur thermique couplé à une installation de chauffage d'un habitacle de véhicule, ainsi qu'à un dispositif de refroidissement selon l'invention ;
- la figure 2 est un organigramme de fonctionnement du dispositif dans une forme de réalisation ; et
- la figure 3 est une courbe illustrant les variations du débit de saturation de la pompe dans l'aérotherme de l'installation de chauffage.
- température de l'air ambiant : Ta,
- régime du moteur : Nmot
- charge du moteur : Cmot,
- température du fluide (eau) en sortie du moteur : Te,
- position de chauffage : Dch, et
- contact du moteur.
- il pilote le groupe moto-ventilateur pour que son régime soit minimal, en sorte que l'on ait Ng = Ngmin.
- régime du groupe moto-ventilateur réglé au minimum, à savoir Ng = Ngmin, et
- régime de la pompe proportionnel à un régime de saturation, à savoir Np = Nsat.
- régime de la pompe Np établi à une valeur minimale Npmin, et
- régime du groupe moto-ventilateur établi à une valeur nulle (ventilateur arrêté).
- position de la vanne = 0, ce qui correspond à la fermeture de la vanne pilotée.
- régime du groupe moto-ventilateur nul,
- régime de la pompe Np fixé à la valeur de saturation Nsat, et
- position de la vanne pilotée nulle, c'est-à-dire fermeture de la vanne pilotée.
Claims (10)
- Dispositif de régulation du refroidissement d'un moteur thermique de véhicule automobile, du type comprenant un circuit de refroidissement (1) parcouru par un fluide sous l'action d'une pompe (2), ce circuit comprenant une branche de refroidissement (3) contenant un radiateur de refroidissement (5) associé à un groupe moto-ventilateur (6), ainsi qu'une branche de chauffage (4) contenant un aérotherme (9), la pompe (2) et le groupe moto-ventilateur (6) étant actionnés chacun par un moteur électrique à régime variable, caractérisé en ce qu'il comprend :des premiers moyens (11) pour établir un état de démarrage à chaud (EDC) du moteur en fonction de conditions choisies ; etdes seconds moyens (11), actifs en cet état de démarrage à chaud pour, en fonction d'une première grandeur représentative de la température du fluide (Te) et d'une deuxième grandeur représentative de la demande de chauffage (Dch), piloter le régime (Np) de la pompe (2) et le régime (Ng) du groupe moto-ventilateur (6) dans des conditions choisies tenant compte d'au moins une loi prédéterminée.
- Dispositif selon la revendication 1, caractérisé en ce que les moyens pour établir l'état de démarrage à chaud (EDC) du moteur (M) comprennent des moyens pour détecter le fonctionnement du moteur, à vitesse nulle du véhicule, et des moyens pour mesurer ou estimer une température (Te) représentative de l'état thermique du moteur et la comparer à au moins un seuil donné (Te1, Te2).
- Dispositif selon la revendication 2, caractérisé en ce que la température (Te) représentative de l'état thermique du moteur est la température du fluide en sortie du moteur.
- Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que les seconds moyens (11) sont propres à:soit piloter le groupe moto-ventilateur (6) à un régime minimal (Ngmin) si la température du fluide (Te) est supérieure à un premier seuil (Te1) ;sinon, stopper le groupe moto-ventilateur (6) si la température du fluide (Te) est inférieure à ce premier seuil (Te1) et supérieure à un deuxième seuil (Te2).
- Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que les seconds moyens (11) sont propres à:soit piloter la pompe (2) à un régime minimal (Npmin) si la demande de chauffage (Dch) est nulle ;sinon, piloter la pompe (2) en fonction d'un régime de saturation (Nsat), si la demande de chauffage (Dch) est positive.
- Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que la branche de refroidissement (3) comprend en outre une vanne pilotée (8), et en ce que les seconds moyens sont propres en outre à régler la vanne pilotée (8) en fonction de la température du fluide (Te).
- Dispositif selon la revendication 6, caractérisé en ce que les seconds moyens sont propres à :soit régler la vanne pilotée (8) dans une position intermédiaire fournissant un écart de température donné (DT) du fluide entre l'entrée et la sortie du moteur, lorsque la température du fluide (Te) est supérieure à un premier seuil (Te1) ;sinon, fermer la vanne pilotée (8) si la température du fluide (Te) est inférieure à ce premier seuil (Te1) et supérieure à un deuxième seuil (Te2).
- Dispositif selon la revendication 7, caractérisé en ce que la position intermédiaire de la vanne pilotée (8) correspondant à un écart de température maximal (DTmax).
- Dispositif selon la revendication 8, caractérisé en ce que l'écart de température maximal (DT max) est d'environ 10°C.
- Dispositif selon l'une des revendications 4 et 7, caractérisé en ce que le premier seuil (Te1) est d'environ 110°C et le second seuil (Te2) d'environ 50°C.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9916769A FR2803334B1 (fr) | 1999-12-30 | 1999-12-30 | Dispositif de regulation du refroidissement d'un moteur thermique de vehicule automobile dans un etat de demarrage a chaud |
FR9916769 | 1999-12-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1113157A1 EP1113157A1 (fr) | 2001-07-04 |
EP1113157B1 true EP1113157B1 (fr) | 2004-08-18 |
Family
ID=9554079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00128308A Expired - Lifetime EP1113157B1 (fr) | 1999-12-30 | 2000-12-22 | Dispositif de régulation du refroidissement d'un moteur thermique de véhicule automobile dans un état de démarrage à chaud |
Country Status (5)
Country | Link |
---|---|
US (1) | US6470838B2 (fr) |
EP (1) | EP1113157B1 (fr) |
AT (1) | ATE274137T1 (fr) |
DE (1) | DE60013082T2 (fr) |
FR (1) | FR2803334B1 (fr) |
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JP4218123B2 (ja) * | 1999-04-15 | 2009-02-04 | 株式会社デンソー | 空調装置 |
US7121368B2 (en) * | 2000-05-09 | 2006-10-17 | Mackelvie Winston | Bi-directional automotive cooling fan |
FR2831209B1 (fr) * | 2001-10-24 | 2004-09-10 | Robert Valot | Dispositif ayant pour objet la maitrise globale de la fonction refroidissement pour les moteurs thermiques employant un liquide de refroidissement, par l'apport d'une pompe a debit variable et un ordinateur integres |
DE10154091A1 (de) | 2001-11-02 | 2003-05-15 | Bayerische Motoren Werke Ag | Verfahren und Vorrichtung zur Regelung eines Kühlsystems einer Verbrennungskraftmaschine |
US7886988B2 (en) * | 2004-10-27 | 2011-02-15 | Ford Global Technologies, Llc | Switchable radiator bypass valve set point to improve energy efficiency |
TW201010881A (en) * | 2008-09-05 | 2010-03-16 | Jun-Guang Luo | Monitoring device and monitoring method for stable kinetic energy |
DE102010032317A1 (de) * | 2010-07-27 | 2012-02-02 | Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) | Kühlvorrichtung eines Verbrennungsmotors und Verfahren zur Kühlung des Verbrennungsmotors |
JP5500264B2 (ja) * | 2010-11-01 | 2014-05-21 | トヨタ自動車株式会社 | 内燃機関の冷却システム |
DE102010056567A1 (de) * | 2010-12-30 | 2012-07-05 | Hydac Cooling Gmbh | Flüssigkeits-Luft-Kühlsystem |
EP2530273B1 (fr) | 2011-06-01 | 2020-04-08 | Joseph Vögele AG | Engin doté d'un réglage de régime de ventilateur automatique |
PL2578888T3 (pl) * | 2011-10-07 | 2019-05-31 | Voegele Ag J | Maszyna budowlana z automatyczną regulacją prędkości obrotowej wentylatora |
US10207567B2 (en) * | 2012-10-19 | 2019-02-19 | Ford Global Technologies, Llc | Heater core isolation valve position detection |
WO2015195371A1 (fr) * | 2014-06-17 | 2015-12-23 | Borgwarner Inc. | Fonction d'écoulement inverse pour ventilateur à double mode |
US10323564B2 (en) | 2016-01-19 | 2019-06-18 | GM Global Technology Operations LLC | Systems and methods for increasing temperature of an internal combustion engine during a cold start including low coolant flow rates during a startup period |
CN107178415B (zh) * | 2017-07-17 | 2023-03-10 | 湖北三环汽车有限公司 | 一种用于提升商用车热平衡性能的*** |
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1999
- 1999-12-30 FR FR9916769A patent/FR2803334B1/fr not_active Expired - Fee Related
-
2000
- 2000-12-22 EP EP00128308A patent/EP1113157B1/fr not_active Expired - Lifetime
- 2000-12-22 AT AT00128308T patent/ATE274137T1/de not_active IP Right Cessation
- 2000-12-22 US US09/742,016 patent/US6470838B2/en not_active Expired - Lifetime
- 2000-12-22 DE DE60013082T patent/DE60013082T2/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US20010017110A1 (en) | 2001-08-30 |
ATE274137T1 (de) | 2004-09-15 |
DE60013082D1 (de) | 2004-09-23 |
US6470838B2 (en) | 2002-10-29 |
EP1113157A1 (fr) | 2001-07-04 |
FR2803334B1 (fr) | 2002-03-22 |
FR2803334A1 (fr) | 2001-07-06 |
DE60013082T2 (de) | 2005-08-18 |
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