EP0688942B1 - Kühlvorrichtung für einen flüssigkeitsgekühlten Verbrennungsmotor eines Kraftfahrzeuges - Google Patents

Kühlvorrichtung für einen flüssigkeitsgekühlten Verbrennungsmotor eines Kraftfahrzeuges Download PDF

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Publication number
EP0688942B1
EP0688942B1 EP95107227A EP95107227A EP0688942B1 EP 0688942 B1 EP0688942 B1 EP 0688942B1 EP 95107227 A EP95107227 A EP 95107227A EP 95107227 A EP95107227 A EP 95107227A EP 0688942 B1 EP0688942 B1 EP 0688942B1
Authority
EP
European Patent Office
Prior art keywords
temperature
coolant
combustion engine
internal combustion
distance
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
Application number
EP95107227A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0688942A1 (de
Inventor
Reinhard Mader
Norbert Dr. Deussen
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0688942A1 publication Critical patent/EP0688942A1/de
Application granted granted Critical
Publication of EP0688942B1 publication Critical patent/EP0688942B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • F01P11/0285—Venting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0204—Filling
    • 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
    • F01P2025/08—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
    • F01P2025/60—Operating parameters
    • 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

Definitions

  • the invention relates to a cooling device for a liquid-cooled internal combustion engine of a motor vehicle with one to the supply and return line of the Cooling circuit of the internal combustion engine connected Radiator, which either has a closable fill opening has or with a surge tank with a closable fill opening and with a temperature controlled thermostatic valve, through which the coolant is wholly or partially either passed through the cooler or through a Short-circuit line between the supply and return lines is guided past the radiator, the thermostatic valve is electrically heated to the coolant temperature in the Cooling circuit of the internal combustion engine compared to one to limit the unheated low value or decrease.
  • a cooling device of the type mentioned is in the not yet published German patent application P 43 24 178.
  • This cooler is the temperature-controlled thermostatic valve is designed in such a way that the coolant temperature is without heating the expansion element of the thermostatic valve in warm-up mode and / or in mixed operation to an upper limit temperature settles.
  • this cooling device is one Control unit provided depending on the detected operating and / or environmental variables of the internal combustion engine Heating of the expansion element releases if necessary the operation of the cooling device from warm-up operation or from mixed operation of the upper working limit temperature towards mixed operation or cooling operation one versus the upper working limit temperature lower coolant temperature to relocate.
  • Expansion element of the thermostatic valve depending of detected operating and / or environmental variables of the internal combustion engine is used to control the heating of the expansion element
  • an electronic control unit required in the recorded farm and / or environmental parameters of the internal combustion engine in a suitable manner processed and to control the heating of the expansion element be used.
  • the upper working limit temperature is preferably the same the most economical operating temperature of the internal combustion engine and is slightly smaller than the maximum permissible operating temperature of the internal combustion engine.
  • the upper working limit temperature is preferably above 100 ° Celsius, especially at around 105 ° Celsius.
  • the maximum permissible operating temperature is the highest possible Temperature with which the internal combustion engine in normal operation be operated without problems over a longer period of time can. This means that even if the electrical fails Heating the expansion element damage the Internal combustion engine prevented. usually the maximum permissible operating temperature between 105 ° Celsius and 120 ° Celsius.
  • the expansion element is not heated electrically, there is only one opening cross-section to the radiator depending on the coolant temperature a.
  • This cross-section of the opening regulates the Coolant temperature to the defined upper working limit temperature.
  • the expansion element for example by selecting an appropriate material with temperature-dependent density and by a suitable constructive Design designed so that at the defined upper working limit temperature of the opening cross section of the cooler is not yet maximum, that is, no pure cooler operation is achieved. So is by additional Heating the expansion element one more Enlargement of the opening cross-section and thus one Relocation in the direction of the cooler operation possible.
  • a cooling device is also known from EP 0 184 196 B1 known to have a bypass return line from the the expansion tank under the filler opening Bypassing the thermostatic valve towards the connection of the return line contains on the internal combustion engine. For filling of the cooling system with coolant during the initial filling or when refilling the coolant filled through the filling opening. It distributed bypassing the bypass return line of the thermostatic valve in the cooling circuit of the internal combustion engine. The coolant flows from the internal combustion engine via the return line into the cooler.
  • EP 0 644 320 A1 (prior art according to Art. 54 (3) EPC) is a cooling device known, in which a forced energization of the thermostatic valve is made when the lid of the filler opening the cooler is removed. Thus, the Coolant at ambient pressure the boiling temperature do not reach. However, a specially provided electrically connected to the cover Switch required, usually with a cooling device is not present.
  • This object is achieved in that the distance traveled by the motor vehicle after the vehicle started Route compared with a border route is set such that when the Border route in normal driving the coolant temperature clearly in the cooling circuit of the internal combustion engine below the opening temperature of the de-energized thermostatic valve and thus remains below the boiling temperature, and that the thermostatic valve away from the vehicle start like this is supplied with current for a longer period than that covered after starting the vehicle Distance less than the border distance is.
  • the thermostatic valve during the entire warm-up and ventilation process is permanently energized.
  • the coolant temperature in the Cooling circuit of the internal combustion engine compared to one low value to the unheated state, namely on a value below the boiling point of the coolant is limited at ambient pressure. If now with increasing Heating of the coolant in the cooling circuit of the Internal combustion engine opens the thermostatic valve, then opens it already at a compared to the boiling temperature of the low temperature coolant. As a consequence, that this is now in the cooler or in its expansion tank coolants entering due to the low temperature is not ejected through the filling opening and thus eliminates the risk of scalding for the filling person is.
  • the distance traveled can be according to the subclaim 2 advantageous by integrating the Vehicle speed signal can be determined.
  • the border route depending on the Coolant temperature set at vehicle start is the border route depending on the Coolant temperature set at vehicle start. This means that the border route is set the longer the lower the coolant temperature when the vehicle is started is.
  • the cooling device for one shown in FIG Internal combustion engine 10 includes a radiator 11, which with an expansion tank 12 with a closable Filling opening 13 is fluidly connected. Between the Cooling circuit 14 of the internal combustion engine 10 and the expansion tank 12, a coolant pump 15 is provided, which a flow of coolant into with Arrows marked direction generated.
  • the coolant outlet the cooling circuit 14 of the internal combustion engine 10 is with a temperature controlled thermostatic valve 16 connected. One leads from this thermostatic valve 16 Return line 17 to the inlet 18 of the cooler 11. From Outlet 19 of the cooler 11 leads a flow line 20 to the thermostatic valve 16. This is also a Short-circuit line 21 with an input 22 of the coolant pump 15 connected.
  • the cooling device essentially operates in three modes.
  • a first mode of operation the so-called Warm-up operation, especially after a cold start of the internal combustion engine 10 is the thermostatic valve 16, which for example is not shown in the figure Contains expansion element from the control unit 23 set so that the cooling circuit 14 of the internal combustion engine 10 coming coolant flow over the Short-circuit line 21 and the coolant pump 15 to the cooling circuit 14 of the internal combustion engine 10 becomes.
  • the cooling system operates in a second mode of operation in mixed operation, that is, that of the cooling circuit 14 of the internal combustion engine 10 coming coolant runs partly through the cooler 11 and partly through the Short-circuit line 21 back to the cooling circuit 14 of the Internal combustion engine 10.
  • a third mode the cooling system in cooler mode, that is, the coming from the cooling circuit of the internal combustion engine 10
  • the coolant is essentially completely by the Radiator 11 through to the cooling circuit 14 of the internal combustion engine 10 returned.
  • the cooling device can be operated by heating of the thermostatic valve 16, that is, for example by Heating the expansion element via an electrical Line 24 with appropriate control by the Control unit 23 is adjusted in the direction of cooler operation or completely switched to cooler operation.
  • the Control unit 23 which supplies the thermostatic valve 16 with electrical energy via line 24, receives other operating variables in addition to the coolant temperature of the internal combustion engine 10.
  • Air intake line of the internal combustion engine 10 is another Arranged in the figure not shown temperature sensor be, which detects the temperature of the intake air and passes on to the control unit 23.
  • Control unit 23 integrated in an electronic engine control.
  • the line 24 connected to the Output of the control unit 23 is connected to the thermostatic valve 16 depending on the coolant temperature and other operating parameters of the internal combustion engine electrically heated.
  • the possibility of electrical Heating the thermostatic valve 16 is according to the invention for quick and safe filling of the entire cooling system 11 used.
  • the cooling device is that of the motor vehicle distance covered after starting the vehicle with a Border route compared. This border route will fixed in such a way that when the Border route in normal driving the coolant temperature in the cooling circuit 14 of the internal combustion engine 10 remains well below the boiling temperature.
  • Thermostatic valve 16 energized, with the result that Thermostatic valve 16 already at coolant temperatures well below the boiling point of the coolant the coolant flow of the cooling circuit 14 of the internal combustion engine 10 passes through the cooler 11. It will achieved that the cooling liquid in the cooling circuit 14 of the internal combustion engine 10 does not have the Boiling temperature can rise at ambient pressure. As a result, this is now in the cooler 11 and in the expansion tank 12 coolant not open due to the lower temperature Filling opening 13 of the expansion tank 12 ejected , which increases the risk of scalding for the filling person is eliminated.
  • the time t is plotted on the abscissa and the distance s and the coolant temperature ⁇ KM are plotted on the ordinate.
  • the curve ⁇ KM shows a typical temperature profile of the coolant during normal driving of the motor vehicle.
  • Curve s shows the distance s covered as a function of time t. If, for example in the diagram in FIG. 2, the limit distance is set to the value s limit , then a coolant temperature of approximately 50 ° Celsius would be established in normal driving according to the characteristic curve line KM .
  • the cooling device that, on the one hand, when the cooler is filled, the coolant temperature always remains well below the boiling temperature and thus the filling can take place safely, and on the other hand, in normal driving operation in the warm-up phase of the internal combustion engine 10 in the cooling circuit 14, coolant temperatures are set above the boiling temperature , which results in a reduction in consumption during the warm-up phase of the internal combustion engine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP95107227A 1994-06-24 1995-05-12 Kühlvorrichtung für einen flüssigkeitsgekühlten Verbrennungsmotor eines Kraftfahrzeuges Expired - Lifetime EP0688942B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4422272A DE4422272A1 (de) 1994-06-24 1994-06-24 Kühlvorrichtung für einen flüssigkeitsgekühlten Verbrennungsmotor eines Kraftfahrzeuges
DE4422272 1994-06-24

Publications (2)

Publication Number Publication Date
EP0688942A1 EP0688942A1 (de) 1995-12-27
EP0688942B1 true EP0688942B1 (de) 1998-10-14

Family

ID=6521500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107227A Expired - Lifetime EP0688942B1 (de) 1994-06-24 1995-05-12 Kühlvorrichtung für einen flüssigkeitsgekühlten Verbrennungsmotor eines Kraftfahrzeuges

Country Status (5)

Country Link
US (1) US5572958A (ja)
EP (1) EP0688942B1 (ja)
JP (1) JP2642085B2 (ja)
DE (2) DE4422272A1 (ja)
ES (1) ES2123854T3 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5657722A (en) * 1996-01-30 1997-08-19 Thomas J. Hollis System for maintaining engine oil at a desired temperature
US6196167B1 (en) * 1999-02-01 2001-03-06 General Electric Company Cooling system for internal combustion engine
JP5641037B2 (ja) * 2012-11-20 2014-12-17 トヨタ自動車株式会社 冷却装置
JP6287961B2 (ja) 2015-06-01 2018-03-07 トヨタ自動車株式会社 内燃機関の冷却装置
KR20200107127A (ko) * 2019-03-06 2020-09-16 현대자동차주식회사 자동차용 냉각 시스템의 냉각수 충진 방법

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2456838A1 (fr) * 1979-05-18 1980-12-12 Sev Marchal Vanne a action thermostatique destinee a un circuit de refroidissement de moteur a combustion interne
JPS59107032U (ja) * 1983-01-10 1984-07-19 日産自動車株式会社 デイ−ゼルエンジンの燃料制御装置
DE3444273C1 (de) * 1984-12-05 1985-11-28 Bayerische Motoren Werke AG, 8000 München Aus Kunststoff hergestellter Wasserkasten fuer einen Querstrom-Kuehler fuer Brennkraftmaschinen
DE8702534U1 (de) * 1987-02-19 1988-06-23 Gustav Wahler Gmbh U. Co, 7300 Esslingen Temperaturregeleinrichtung für das Kühlmittel von Brennkraftmaschinen
DE3705232C2 (de) * 1987-02-19 1996-01-18 Wahler Gmbh & Co Gustav Verfahren und Einrichtung zur Temperaturregelung des Kühlmittels von Brennkraftmaschinen
US4961530A (en) * 1988-10-03 1990-10-09 Robert Shaw Controls Company Engine cooling system, structure therefor and methods of making the same
DE4035179A1 (de) * 1990-11-06 1992-05-07 Wahler Gmbh & Co Gustav Thermostatventil zur regelung der temperatur der kuehlfluessigkeit einer brennkraftmaschine
DE4324178A1 (de) * 1993-07-19 1995-01-26 Bayerische Motoren Werke Ag Kühlanlage für einen Verbrennungsmotor eines Kraftfahrzeuges mit einem Thermostatventil, das ein elektrisch beheizbares Dehnstoffelement enthält
DE4332101B4 (de) * 1993-09-22 2005-09-15 Bayerische Motoren Werke Ag Kühlvorrichtung für einen flüssigkeitsgekühlten Verbrennungsmotor eines Kraftfahrzeuges

Also Published As

Publication number Publication date
JP2642085B2 (ja) 1997-08-20
ES2123854T3 (es) 1999-01-16
JPH0814042A (ja) 1996-01-16
DE4422272A1 (de) 1996-01-04
EP0688942A1 (de) 1995-12-27
DE59503903D1 (de) 1998-11-19
US5572958A (en) 1996-11-12

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