EP0389502A1 - Procede et dispositif de refroidissement de moteur. - Google Patents

Procede et dispositif de refroidissement de moteur.

Info

Publication number
EP0389502A1
EP0389502A1 EP19880909289 EP88909289A EP0389502A1 EP 0389502 A1 EP0389502 A1 EP 0389502A1 EP 19880909289 EP19880909289 EP 19880909289 EP 88909289 A EP88909289 A EP 88909289A EP 0389502 A1 EP0389502 A1 EP 0389502A1
Authority
EP
European Patent Office
Prior art keywords
coolant
switching device
engine
sensor
pump
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
Application number
EP19880909289
Other languages
German (de)
English (en)
Other versions
EP0389502B1 (fr
Inventor
Peter Nolting
Wolfgang Scheidel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AT88909289T priority Critical patent/ATE86361T1/de
Publication of EP0389502A1 publication Critical patent/EP0389502A1/fr
Application granted granted Critical
Publication of EP0389502B1 publication Critical patent/EP0389502B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • 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
    • 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
    • F01P7/026—Thermostatic control
    • 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
    • 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
    • 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
    • F01P2005/105—Using two or more pumps
    • 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
    • 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
    • F01P2007/143—Controlling of coolant flow the coolant being liquid using restrictions
    • 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
    • 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
    • F01P2023/00—Signal processing; Details thereof
    • F01P2023/08—Microprocessor; Microcomputer
    • 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
    • F01P2025/04—Pressure
    • 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
    • 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
    • F01P2025/12—Cabin 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
    • F01P2025/08—Temperature
    • F01P2025/13—Ambient 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
    • F01P2025/08—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
    • F01P2025/08—Temperature
    • F01P2025/46—Engine parts 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
    • F01P2025/08—Temperature
    • F01P2025/48—Engine room 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
    • F01P2025/64—Number of revolutions
    • 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
    • F01P2031/00—Fail safe
    • 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
    • F01P2031/00—Fail safe
    • F01P2031/20—Warning 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
    • F01P2031/00—Fail safe
    • F01P2031/34—Limping home
    • 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
    • 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
    • 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
    • F01P7/10—Controlling of coolant flow the coolant being cooling-air by throttling amount of air flowing through liquid-to-air heat exchangers
    • F01P7/12—Controlling of coolant flow the coolant being cooling-air by throttling amount of air flowing through liquid-to-air heat exchangers by thermostatic control

Definitions

  • the invention relates to a device and a method for engine cooling according to the preamble of the main claim.
  • a vehicle engine cooling system developed for a test vehicle is known from automotive engineering journal 87 (1985), number 12, pp. 638-639.
  • the use of an electrically driven water pump is provided, by means of which the cooling water flow is adapted to the needs, e.g. the increased need at higher speeds or when the engine is switched off at higher speeds.
  • the device for engine cooling according to the invention has the advantage over the prior art that a mechanical coolant pump driven by the engine to be cooled and an electrically driven coolant pump are provided, the delivery rate of which is controlled as a function of measured values.
  • the mechanical pump takes on a basic load, while the delivery rate of the electric pump can be adapted to the required cooling capacity.
  • the inventions increase device according to the operational reliability of the engine cooling. In the event of a pump failure, limited engine operation or at least emergency operation is guaranteed.
  • the electronic switching device that controls the electric pump and the other components for the blinds, blowers and mixing valves receives additional information such as engine operating temperature, engine compartment temperature, temperatures of engine parts, ambient temperature, engine speed, driving speed and a pressure signal from the coolant. With this information, the delivery capacity of the electric pump can be precisely adjusted to the required cooling capacity.
  • a second coolant circuit with a heat exchanger is provided. If the motor to be cooled is arranged as a drive motor in a motor vehicle, the waste heat from the exchanger is used to heat the motor vehicle interior. According to the invention it is provided that the control of this circuit is also carried out by the electronic switching device, the heating circuit also contributing in a known manner to the cooling of the engine in summer by closing off the heating ducts leading into the interior and simultaneously opening air ducts opening outdoors. The circle takes on cooling peaks, for example.
  • the second coolant circuit is designed as an independent cooling circuit with its own coolant pump.
  • This configuration enables a further improvement in the cooling capacity control.
  • the method according to the invention for operating the device has the advantage that the delivery rate of the electric pump is not only dependent on the coolant temperature, but also as a function of at least one further operating parameter.
  • Figures 1 and 2 show a first and a second embodiment of an inventive device for engine cooling.
  • FIG. 1 shows an engine 10 to be cooled with a first and second coolant circuit connection 11, 12.
  • the coolant emerges from the engine 10 at the first connection 11 and returns to the engine 10 at the second connection 12.
  • the flow direction of the coolant is indicated by arrows 13, 14.
  • the coolant circuit contains a first coolant path 15, in the course of which a first heat exchanger 16 that can be operated as a cooler is arranged.
  • the first coolant path 15 can be bridged with a second coolant path 17 connected as a bypass.
  • a first controllable valve 18 takes over the coolant distribution in the first and second paths 15, 17.
  • the valve 18 can be a valve controlled by the coolant temperature. It is preferably designed as an electrically controllable valve.
  • the valve 18 works either continuously or in clocked operation. In clocked operation, the coolant flow to the first or second coolant path 15, 17 is either completely released or completely blocked.
  • the clocked operation is particularly suitable for an electrically controlled valve 18.
  • a third coolant path 19 is provided, in the course of which a second heat exchanger 20 is arranged.
  • the third coolant path 19 can be connected to the bypass 17 via a controllable valve 21.
  • a controllable valve 21 instead of connecting the third coolant path 19 to the bypass 17, its design as a further bypass to the first coolant path 15 can also be provided.
  • The, preferably electrically controllable valve 21 works either continuously or in clocked operation.
  • a coolant pump 22 arranged in the coolant circuit and driven by the engine 10 takes care of the coolant transport.
  • the pump 22 is referred to below as a mechanical pump 22.
  • a further coolant pump 23 is connected in series with the mechanical pump 22 and its delivery rate can be adjusted electrically.
  • the further coolant pump 23 is referred to below as an electrical pump 23.
  • an electronic switching device 24 which has operating parameters as input signals of the motor 10 and the cooling circuit are supplied. Specifically, these are the engine speed detected by a speed sensor 25, the engine temperature detected by at least one engine temperature sensor 26, the coolant temperature detected by a coolant temperature sensor 27, the pressure of the coolant in the cooling circuit detected by a pressure sensor 28, and the air temperature immediately detected by an engine compartment temperature sensor 29 Environment of the engine 10, the temperature detected by at least one engine part temperature sensor 30 and the temperature of the air in the wider environment (outside temperature) of the engine 10 by an ambient air temperature sensor 31.
  • the electronic switching device 24 receives further input signals such as the driving speed detected by a speed sensor 32, the signal emitted by a heating and ventilation controller 33 for specifying at least one target temperature in the vehicle interior, and that Signal delivered by at least one hot air temperature sensor 34 supplied.
  • the electronic switching device 24 first outputs an output signal to the electric pump 23. Additional output signals are optionally output to the valves 18, 21, provided the two valves 18, 21 can be controlled electrically. Furthermore, output signals are output to an actuating device 35, which actuates an adjustable blind 36 arranged in front of the first heat exchanger 16 used as a cooler, to at least one fan motor 37, 38 arranged in each of the two heat exchangers 16, 20 and to an actuating device 39 actuating an air flap 41 , which is arranged in an air duct 40 leading away from the second heat exchanger 20 and which opens the air path either to a heating air duct 42 or to an exhaust air duct 43 which opens out in the open.
  • an actuating device 35 which actuates an adjustable blind 36 arranged in front of the first heat exchanger 16 used as a cooler, to at least one fan motor 37, 38 arranged in each of the two heat exchangers 16, 20 and to an actuating device 39 actuating an air flap 41 , which is arranged in an air duct 40 leading away
  • the electronic switching device 24 also outputs an overtemperature warning signal or a signal that indicates a failure of a coolant pump 22, 23 to a device 44.
  • the device 44 is, for example, a signal lamp on the dashboard of the motor vehicle or part of an engine control. The engine power is throttled after a fault occurs.
  • the device according to the invention according to FIG. 1 works as follows:
  • the mechanical pump 22 begins to deliver the coolant.
  • the delivery rate of the mechanical pump 22 depends on the speed of the motor 10 and is set to a value which is insufficient for the required coolant delivery rate.
  • the coolant flows back from the first cooling circuit connection 11 via the bypass 17 and the mechanical pump 22 to the second cooling circuit connection 12. This small circuit requires almost no cooling power, so that the engine 10 quickly reaches the operating temperature at which it has the maximum efficiency.
  • the controllable valve 18 opens, depending on the mode of operation, either partially or completely, the first coolant path 15 with the first heat exchanger 16, which is operated as a cooler the adjusting device 35 opens the previously closed blind 36 so that an increased flow of cooling air is passed over the cooler 16. If necessary, the blower motor 37 is switched on to further support the heat dissipation from the cooler 16. Adaptation of the cooling capacity to the cooling capacity requirement is achieved with the electric pump 23 by changing the coolant flow. The adaptation to the cooling power requirement is not only dependent on the coolant temperature recorded by the coolant temperature sensor 27 structure, but as a function of other signals.
  • the electronic switching device 24 uses as input signals the operating temperature of the motor 10, the air temperature in the immediate vicinity of the motor 10, the ambient temperature (outside temperature) which can be measured further away from the motor 10, the temperature of motor parts and the speed of the motor.
  • the electronic control unit 24 also receives information about the driving speed.
  • the information about, for example, the engine temperature or the temperature of certain engine parts makes it possible to increase the cooling output before a significant rise in the coolant temperature can be determined by the coolant temperature sensor 27.
  • the inclusion of the speed for cooling capacity control has the advantage that the coolant flow can be increased with the electric pump 23 before local heating occurs in the engine.
  • the measurement of the driving speed has an influence in particular on the actuation of the blind 36 and the fan 37. At higher driving speeds, it would be inappropriate, for example, to keep the blind 36 closed and to switch on the fan 37. Such inappropriate operating states can be identified and avoided with the electronic switching device 24.
  • a further possibility of dissipating heat from the cooling circuit is through the release of the third coolant path 19.
  • the controllable valve 18 is either continuously adjusted or clocked Operation controlled in such a way that at least part of the coolant flow flows from the first cooling circuit connection 11 via the third coolant path 19 and the second heat exchanger 20 back to the second cooling circuit connection 12.
  • the air heated at the second heat exchanger 20 is passed on through the channel 40 and through the channels 42, 43.
  • the heating air duct 42 opens into the vehicle interior.
  • the heating air temperature sensor 34 in conjunction with the electronic switching device 24 and with further temperature sensors (not shown) in the heating system and in the motor vehicle interior, ensures that a target temperature is maintained in the interior.
  • the exhaust air duct 43 which opens outdoors, permits the use of the second heat exchanger 20 as a cooler even at high outside temperatures. In this operating case, the actuating device 39 completely closes the heating air duct 42 with the air flap 41.
  • the valve 18 can completely block the coolant flow through the first coolant path 15. This operating state occurs in vehicle heating in winter. With the help of the electronic switching device 24 it can be determined that the coolant flow through the third coolant path 19 remains blocked during the warm-up phase of the engine 10 and is only opened when a minimum temperature is present. No heating energy is then available during the start-up phase. This operation can either be activated via the temperature controller 33 or is already predetermined in the electronic switching device 24. The heat output via the second heat exchanger 20 can be changed with the blower motor 38 if necessary.
  • the detection of the coolant pressure with the aid of the pressure sensor 28, in conjunction with the coolant temperature, enables a correlation to be used to make a statement about the coolant state (risk of vapor formation).
  • FIG. 2 shows a further advantageous embodiment of the device according to the invention. Those parts of FIG. 2 which correspond to those in FIG. 1 are provided with the same reference numbers.
  • the third coolant path 19 shown in Figure 1 and that in Bypass 17 arranged valve 21 are no longer present in the device according to Figure 2.
  • the second heat exchanger 20 is arranged in a separate coolant circuit.
  • the engine 10 therefore has a third coolant connection 50 and a fourth coolant connection 51.
  • the coolant flows from the third coolant connection 50 to the fourth coolant connection 51.
  • the direction of flow is indicated by arrows 52, 53.
  • the coolant is circulated with a third coolant pump 54, the delivery rate of which can preferably be predetermined with an electrical signal.
  • the second cooling circuit with the second heat exchanger 20 is used for vehicle heating or for heat dissipation of peak power for which the first cooling circuit is not designed.
  • the coolant temperature is first reached quickly and precisely.
  • the motor 10 is thereby kept in a temperature range with maximum efficiency.
  • the quick heating process reduces wear at low operating temperatures.
  • the adaptation of the cooling capacity to the cooling capacity required for the engine 10 contributes to energy savings, since the previous oversizing of the cooling circuit is no longer necessary.
  • the electronic switching device 24 does not exclude sensible operating states. In particular when using the device according to the invention for cooling a motor vehicle engine, an optimal coordination between the required cooling and heating of the vehicle interior is possible.
  • a parallel connection can also be provided if non-return valves or similar devices are arranged in the pump sections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

Un dispositif et un procédé de refroidissement de moteur prévoient dans au moins un circuit de refroidissement d'un moteur (10) à refroidir, au moins une pompe à réfrigérant (22) mécanique entraînée par ledit moteur (10), ainsi qu'au moins une pompe à réfrigérant (23, 54) électrique commandée par un commutateur (24) électronique. Le débit de la pompe électrique (23, 54) est déterminé en fonction de valeurs caractéristiques de fonctionnement du moteur (10) à refroidir ainsi que d'autres grandeurs, tandis que la pompe mécanique (22) est conçue pour un débit de base. Dans le circuit de refroidissement est agencé, dans un premier parcours de réfrigérant (15), un échangeur de chaleur (16) faisant office de radiateur, dont la puissance de refroidissement est modifiable à l'aide d'une persienne (36) et d'un ventilateur (37). Dans un autre parcours de réfrigérant (19) ou dans un circuit de refroidissement séparé est agencé un autre échangeur de chaleur (20) dont la chaleur dissipée est utilisée à des fins de chauffage, ou bien de refroidissement complémentaire du moteur.
EP88909289A 1987-11-12 1988-10-26 Procede et dispositif de refroidissement de moteur Expired - Lifetime EP0389502B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88909289T ATE86361T1 (de) 1987-11-12 1988-10-26 Vorrichtung und verfahren zur motorkuehlung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3738412 1987-11-12
DE19873738412 DE3738412A1 (de) 1987-11-12 1987-11-12 Vorrichtung und verfahren zur motorkuehlung

Publications (2)

Publication Number Publication Date
EP0389502A1 true EP0389502A1 (fr) 1990-10-03
EP0389502B1 EP0389502B1 (fr) 1993-03-03

Family

ID=6340334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88909289A Expired - Lifetime EP0389502B1 (fr) 1987-11-12 1988-10-26 Procede et dispositif de refroidissement de moteur

Country Status (7)

Country Link
US (1) US5036803A (fr)
EP (1) EP0389502B1 (fr)
JP (1) JPH03500795A (fr)
KR (1) KR960012136B1 (fr)
AT (1) ATE86361T1 (fr)
DE (2) DE3738412A1 (fr)
WO (1) WO1989004419A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US6227153B1 (en) 1999-09-17 2001-05-08 General Electric Company Engine cooling apparatus and method

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EP0389502B1 (fr) 1993-03-03
DE3738412A1 (de) 1989-05-24
ATE86361T1 (de) 1993-03-15
JPH03500795A (ja) 1991-02-21
KR900700721A (ko) 1990-08-16
US5036803A (en) 1991-08-06
DE3878919D1 (de) 1993-04-08
WO1989004419A1 (fr) 1989-05-18
KR960012136B1 (en) 1996-09-16

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