EP0478995A1 - Moteur à combustion interne refroidi à liquide en ébullition - Google Patents

Moteur à combustion interne refroidi à liquide en ébullition Download PDF

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Publication number
EP0478995A1
EP0478995A1 EP91115248A EP91115248A EP0478995A1 EP 0478995 A1 EP0478995 A1 EP 0478995A1 EP 91115248 A EP91115248 A EP 91115248A EP 91115248 A EP91115248 A EP 91115248A EP 0478995 A1 EP0478995 A1 EP 0478995A1
Authority
EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
cooling system
expansion tank
engine according
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.)
Withdrawn
Application number
EP91115248A
Other languages
German (de)
English (en)
Inventor
Andreas Sausner
Jens Sielaff
Hans-Peter Jaekel
Klaus Mertens
Karl-Heinz Dr. Spies
Hans-Jürgen Schäfer
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP0478995A1 publication Critical patent/EP0478995A1/fr
Withdrawn legal-status Critical Current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
    • F01P3/00—Liquid cooling
    • F01P3/22—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point
    • 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
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of 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
    • F01P7/10—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 an evaporation-cooled internal combustion engine, in which a cooling system containing a coolant and an expansion tank are provided.
  • a cooling system containing a coolant and an expansion tank are provided.
  • Such an internal combustion engine is known from DE-OS 38 09 136. To ensure proper operation, a large number of sensors are required, which makes the internal combustion engine complicated in structure and prone to failure.
  • the invention is based on the object of further developing such an internal combustion engine in such a way that a comparatively simplified structure and greater operational reliability result.
  • the expansion tank is connected to a gas-filled zone of the cooling system by means of a line.
  • the line and the expansion tank are not designed to flow through. As a result, they are not heated in a special way under normal operating conditions, with the result that the gas contained under normal operating conditions, as well as when the internal combustion engine is switched off, essentially consists only of air which is free from water droplets.
  • the expansion tank is nevertheless able to hold that volume which results from the operational heating of the coolant contained in the cooling system. This causes an evaporation of coolant components in the internal combustion engine, the volume of which can be condensed in the condenser in the same time unit in parallel with its formation.
  • the condenser is dimensioned so that it is almost completely filled with evaporated coolant under normal operating conditions.
  • the cooling surfaces contained in the condenser are available to a correspondingly large extent for dissipating the heat of condensation released during the re-liquefaction of the coolant.
  • the expansion tank can be closed off from the outside by a flexible and liquid-impermeable, flexible wall, in order to ensure that the coolant cannot escape.
  • the wall can form part of a floating piston, for example, which can possibly be moved back and forth in a cylindrical compensation vessel.
  • the wall is designed to be resilient, there is the advantage that the cooling system can be controlled more easily.
  • the wall always has a very specific position depending on the respective operating temperature of the internal combustion engine. This can be detected with the aid of simple control devices, which makes it possible to draw conclusions about the tightness of the entire cooling system.
  • the wall can be supported on a secondary spring, for example made of a coil spring made of metallic material, which is integrated in the expansion tank.
  • a secondary spring for example made of a coil spring made of metallic material, which is integrated in the expansion tank.
  • an air cushion can also be used.
  • the manufacture of a correspondingly designed expansion tank is very simple and, accordingly, inexpensive.
  • a sensor for continuously detecting the internal pressure is assigned to the expansion tank.
  • the signal emitted by the sensor in such an embodiment allows conclusions to be drawn about the current operating temperature of the internal combustion engine.
  • the signal is therefore preferably used in the context of the present invention in order to activate auxiliary devices which cool the condenser to the extent required, for example a cooling air fan and / or a radiator louvre.
  • auxiliary devices which cool the condenser to the extent required, for example a cooling air fan and / or a radiator louvre. It has proven particularly expedient here if the sensor is assigned to the relatively movable wall which delimits the expansion tank from the surroundings. It is itself protected from direct exposure to the coolant, which simplifies its manufacture and improves operational safety over long periods of time.
  • FIG. 1 shows an evaporative-cooled internal combustion engine in a schematic representation.
  • a cooling system 2 is provided, which has a condenser 3 and an expansion tank 4.
  • the expansion tank 4 is connected to a gas-filled zone of the cooling system 2 by means of a line 5. In the present case, this is a zone that forms the highest point of the capacitor 3. All locations of the cooling system 3 and the internal combustion engine 1, which are located below this zone 6, are normally in a cold internal combustion engine completely filled with liquefied coolant.
  • the line 12 is directly connected to a return line 13 through a coolant separator 14 and a short-circuit line 11.
  • This opens into the lower end of the internal combustion engine 1 and contains a pump 15, by means of which the feed of liquefied coolant components in the internal combustion engine can be increased if necessary.
  • the lines 11, 12 and 13 mentioned above can, under certain circumstances, ensure sufficient condensation of the vapor volume leaving the internal combustion engine 1, for example at cold bypass temperatures and / or with an extremely short operating time. In such cases, the internal combustion engine 1 heats up particularly quickly to operating temperature, which reduces wear and allows excess heat of the internal combustion engine to be made available for heating the interior of a motor vehicle immediately after starting.
  • the coolant level within the condenser 3 can vary slightly.
  • the expansion tank 4 has the task of improving the condenser efficiency by regulating the air mass in the cooling system as a function of pressure.
  • the expansion tank 4 is connected to a steam-filled zone 6 of the cooling system by means of a blind line 5.
  • gas that is at normal ambient temperature i.e. of steam-free air that is extracted from the cooling system. Irrespective of the respective load level of the internal combustion engine 1, air can therefore no longer impair the capacitor efficiency.
  • a membrane 7 is contained, which is liquid-impermeable and elastically resilient.
  • the membrane 7 closes off the interior of the cooling system from the outside. It is supported on the back by a secondary spring, which is made of metal and allows a certain internal pressure to be guaranteed within the cooling system.
  • the relevant deviations are compensated for by the expansion tank 4, which is connected by means of a line 5 to a steam-filled zone 6 of the cooling system.
  • a membrane 7 is contained, which is liquid-impermeable and elastically resilient. The membrane 7 closes off the interior of the cooling system from the outside. It is supported on the back by a secondary spring, which is made of metal and allows a certain internal pressure to be guaranteed within the cooling system.
  • a sensor 9 is attached to the rear of the expansion tank 4. This enables the respective position of the membrane 7 to be determined and forms a signal therefrom which permits an immediate conclusion to be drawn about the respective operating temperature of the internal combustion engine 1.
  • the signal is excellently suitable for controlling an auxiliary device 10 which allows the condensation effect of the capacitor 3 to be adapted to the respective requirements of the load case.
  • a device 10 is a cooling air fan. If necessary, the device can be supplemented or replaced by a signal-operated radiator blind.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
EP91115248A 1990-10-05 1991-09-10 Moteur à combustion interne refroidi à liquide en ébullition Withdrawn EP0478995A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4031475 1990-10-05
DE4031475 1990-10-05

Publications (1)

Publication Number Publication Date
EP0478995A1 true EP0478995A1 (fr) 1992-04-08

Family

ID=6415605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91115248A Withdrawn EP0478995A1 (fr) 1990-10-05 1991-09-10 Moteur à combustion interne refroidi à liquide en ébullition

Country Status (4)

Country Link
US (1) US5213066A (fr)
EP (1) EP0478995A1 (fr)
JP (1) JPH04259621A (fr)
BR (1) BR9104298A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2726032A1 (fr) * 1994-10-21 1996-04-26 Valeo Thermique Moteur Sa Dispositif d'expansion pour circuit de refroidissement diphasique
EP2118463A4 (fr) * 2007-02-09 2014-05-14 Volvo Lastvagnar Ab Système de liquide de refroidissement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4229110C1 (de) * 1992-09-01 1993-10-07 Freudenberg Carl Fa Vorrichtung zum vorübergehenden Speichern und dosierten Einspeisen von im Freiraum einer Tankanlage befindlichen flüchtigen Kraftstoffbestandteilen in das Ansaugrohr einer Verbrennungskraftmaschine
US9476345B2 (en) * 2012-10-19 2016-10-25 Ford Global Technologies, Llc Engine cooling fan to reduce charge air cooler corrosion

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1652985A (en) * 1926-06-21 1927-12-13 Abram E Hostetter Condenser for motor-vehicle radiators
FR1252221A (fr) * 1959-12-18 1961-01-27 Chausson Usines Sa Dispositif de refroidissement à circulation de liquide pour moteurs à combustion interne
GB1043066A (en) * 1964-03-30 1966-09-21 Ford Motor Co Cooling systems for internal combustion engines
US4648356A (en) * 1984-06-12 1987-03-10 Nissan Motor Co., Ltd. Evaporative cooling system of internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1676045A (en) * 1926-08-02 1928-07-03 Frank R Perry Condenser for automobile engine radiators
JPS5020940B1 (fr) * 1970-03-30 1975-07-18
DE3339717A1 (de) * 1983-11-03 1985-05-15 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Verdampfungskuehlung fuer verbrennungsmotoren
JPS60153417A (ja) * 1984-01-24 1985-08-12 Nissan Motor Co Ltd 内燃機関の冷却装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1652985A (en) * 1926-06-21 1927-12-13 Abram E Hostetter Condenser for motor-vehicle radiators
FR1252221A (fr) * 1959-12-18 1961-01-27 Chausson Usines Sa Dispositif de refroidissement à circulation de liquide pour moteurs à combustion interne
GB1043066A (en) * 1964-03-30 1966-09-21 Ford Motor Co Cooling systems for internal combustion engines
US4648356A (en) * 1984-06-12 1987-03-10 Nissan Motor Co., Ltd. Evaporative cooling system of internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2726032A1 (fr) * 1994-10-21 1996-04-26 Valeo Thermique Moteur Sa Dispositif d'expansion pour circuit de refroidissement diphasique
EP2118463A4 (fr) * 2007-02-09 2014-05-14 Volvo Lastvagnar Ab Système de liquide de refroidissement

Also Published As

Publication number Publication date
BR9104298A (pt) 1992-06-02
US5213066A (en) 1993-05-25
JPH04259621A (ja) 1992-09-16

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