DE4400201A1 - Liquid-cooled internal combustion engine with lubricant cooling - Google Patents

Liquid-cooled internal combustion engine with lubricant cooling

Info

Publication number
DE4400201A1
DE4400201A1 DE19944400201 DE4400201A DE4400201A1 DE 4400201 A1 DE4400201 A1 DE 4400201A1 DE 19944400201 DE19944400201 DE 19944400201 DE 4400201 A DE4400201 A DE 4400201A DE 4400201 A1 DE4400201 A1 DE 4400201A1
Authority
DE
Germany
Prior art keywords
oil
internal combustion
combustion engine
oil cooler
valve
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Withdrawn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
DE19944400201
Other languages
German (de)
Inventor
Peter Dipl Ing Moser
Fred Dipl Ing Sigrist
Friedrich Dipl Ing Schulz
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz 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 Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Priority to DE19944400201 priority Critical patent/DE4400201A1/en
Publication of DE4400201A1 publication Critical patent/DE4400201A1/en
Withdrawn legal-status Critical Current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
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • 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
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • 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
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • 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
    • F01P2007/168—By varying the cooling capacity of a liquid-to-air heat-exchanger
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler

Abstract

The invention relates to a liquid-cooled internal combustion engine with lubricant cooling, with an oil cooler, through which coolant flows, and a bypass for bypassing the oil cooler, the bypass being provided in the oil circuit of the oil cooler and it being possible to shut off or control the oil feed quantity running to the oil cooler at high load by means of a coolant temperature-dependent valve.

Description

Die Erfindung betrifft eine flüssigkeitsgekühlte Brennkraft­ maschine mit Schmiermittelkühlung nach den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.The invention relates to a liquid-cooled internal combustion engine machine with lubricant cooling according to the generic term of Features specified claim 1.

Aus der DE 36 22 378 A1 ist ein derartiges Kühlflüssigkeitssy­ stem für eine Brennkraftmaschine bekannt, bei dem ein Ölkühler von einer Kühlflüssigkeit durchströmt wird. An den Ölkühler ist neben einer Zulauf- und Rücklaufleitung für die Kühlflüssigkeit auch eine Ölzuführ- und Ölrückführleitung angeschlossen. Das kühlflüssigkeitsführende Leitungssystem mit thermostatisch re­ gelbaren Wegeventilen ist so ausgeführt, daß u. a. durch Regelung eines den Ölkühler umgehenden Bypass hohe Kühlflüssigkeitstempe­ raturdifferenzen beim Betrieb der Brennkraftmaschine zwischen Vollast und Leerlauf bzw. bei starken Wechsellastbetrieben abge­ baut werden.DE 36 22 378 A1 describes such a coolant system stem known for an internal combustion engine in which an oil cooler is flowed through by a coolant. To the oil cooler in addition to an inlet and return line for the coolant also an oil feed and oil return line connected. The Coolant-carrying pipe system with thermostatic right directional valves is designed so that u. a. by regulation a bypass high coolant temperature bypassing the oil cooler Differences in temperature when operating the internal combustion engine between Full load and idling or abge at strong alternating load operations be built.

Der Erfindung liegt die Aufgabe zugrunde, Maßnahmen an einer flüssigkeitsgekühlten Brennkraftmaschine mit Schmiermittelküh­ lung zu treffen, durch die die im Vollastbetrieb der Brennkraft­ maschine, insbesondere bei Überwindung von Bergsteigungen, auf­ tretenden hohen thermischen Belastungen im Kühlmittelkreislauf auf ein die störungsfreie Kühlfunktion sicherstellendes Maß minimiert werden können.The invention has for its object measures on a liquid-cooled internal combustion engine with lubricant cooling to meet through which the full load operation of the internal combustion machine, especially when overcoming mountain gradients occurring high thermal loads in the coolant circuit to a level that ensures the trouble-free cooling function can be minimized.

Zur Lösung dieser Aufgabe dienen die im Kennzeichen des Patent­ anspruchs 1 angegebenen Merkmale. To solve this problem are the characteristics of the patent claims 1 specified characteristics.  

Durch die erfindungsgemäßen Maßnahmen, nämlich durch das tempe­ raturabhängige Abkoppeln des Ölkreislaufes vom Kühlflüssigkeits­ kreislauf bzw. durch Ölumgehung des Ölkühlers oder durch die kühlflüssigkeitstemperaturabhängige Regelung der Ölzuführmenge zum Ölkühler wird die den Ölkühler ständig durchströmdende Kühl­ flüssigkeit nicht mehr durch das Öl aufgeheizt, das gegenüber der Kühlflüssigkeit eine wesentlich höhere Temperatur hat. Somit wird ein örtliches Sieden der Flüssigkeitsmenge sowie die Bil­ dung von Dampfblasen und überhöhtem Druck im Kühlmittelkreislauf vermieden. Es tritt zwar bei einer derartigen Schaltung eine Überhöhung der Öltemperatur auf, sie ist aber kurzzeitig weniger kritisch als überhöhte Kühlmitteltemperaturen, welche zur Funk­ tionsbeeinträchtigung des Gesamtkühlsystems oder gar zu Schäden in diesem Kühlsystem führen können.By the measures according to the invention, namely by the tempe uncoupling of the oil circuit from the coolant circuit or bypassing the oil cooler or by Regulation of the oil supply quantity depending on the coolant temperature the oil cooler becomes the coolant that continuously flows through the oil cooler liquid no longer heated by the oil that opposite the coolant has a much higher temperature. Consequently there is a local boiling of the amount of liquid and the bil formation of vapor bubbles and excessive pressure in the coolant circuit avoided. It does occur with such a circuit Excessive increase in oil temperature, but it is less for a short time critical as excessive coolant temperatures leading to radio impairment of the overall cooling system or even damage can result in this cooling system.

In den Unteransprüchen sind noch förderliche Weiterbildungen der Erfindung angegeben.In the subclaims there are still further developments Invention specified.

Die Erfindung ist in der Zeichnung dargestellt und wird im fol­ genden näher erläutert.The invention is shown in the drawing and is in fol explained in more detail.

Eine flüssigkeitsgekühlte Brennkraftmaschine 1 mit Schmiermit­ telkühlung treibt eine Kühlwasserpumpe 2 und eine nicht näher dargestellte Schmiermittelpumpe an. Die Kühlwasserpumpe 2 saugt Kühlwasser aus einer am Kühlwasserwärmetauscher 3 angeschlosse­ nen Kühlerrücklaufleitung 4 an und fördert es in Kühlwasserräume der Brennkraftmaschine 1. Das Kühlwasser strömt durch eine Küh­ lervorlaufleitung 5 zum Kühlwasserwärmetauscher 3. Neben diesem Kühlwasserkreislauf ist ein weiterer Kühlwasserkreislauf für ei­ nen Ölkühler 6 bzw. einen Ölwasserwärmetauscher vorgesehen, an den einerseits eine wasserführende Vorlaufleitung 7 und Rück­ laufleitung 8 und andererseits eine Ölzuführleitung 9 und Öl­ rücklaufleitung 10 eines Ölkreislaufes angeschlossen ist. Der Ölkreislauf ist mit einem den Ölkühler 6 umgehenden Bypass 11 mit einem Ventil 12 versehen, das in Abhängigkeit von der Kühlwassertemperatur stromauf des Ölkühlers 6 die Ölzulaufmenge zu dem Ölkühler regelt. Der in der wasserführenden Vorlauflei­ tung 7 vorgesehene Temperaturfühler 13 zur Regelung des Ventiles 12 kann aber auch in der zum Kühlwasserwärmetauscher 3 führenden Kühlervorlaufleitung 4 angeordnet sein (strichpunktiert darge­ stellt).A liquid-cooled internal combustion engine 1 with lubricant telkühlung drives a cooling water pump 2 and a lubricant pump, not shown. The cooling-water pump 2 sucks cooling water from a nozzle castle at the cooling water heat exchanger 3 nen cooler return line 4 and feeds it in cooling water chambers of the internal combustion engine. 1 The cooling water flows through a cooler supply line 5 to the cooling water heat exchanger 3 . In addition to this cooling water circuit, a further cooling water circuit for egg NEN oil cooler 6 or an oil water heat exchanger is provided, to which on the one hand a water-carrying flow line 7 and return line 8 and on the other hand an oil supply line 9 and oil return line 10 of an oil circuit is connected. The oil circuit is provided with a bypass 11 which bypasses the oil cooler 6 and has a valve 12 which, depending on the cooling water temperature upstream of the oil cooler 6, regulates the oil feed quantity to the oil cooler. The provided in the water-carrying Vorlauflei device 7 temperature sensor 13 for controlling the valve 12 can also be arranged in the leading to the cooling water heat exchanger 3 cooler supply line 4 (dash-dot Darge provides).

Das Ventil 12 kann als einfaches Absperrventil für die Absper­ rung des Ölzulaufs zum Ölkühler 5 oder als 3-Wege-Ventil ausge­ bildet sein, welches den ölkühlerseitigen Ausgang regelt.The valve 12 can be formed as a simple shut-off valve for the shut-off of the oil supply to the oil cooler 5 or as a 3-way valve which regulates the oil cooler-side output.

Claims (3)

1. Flüssigkeitsgekühlte Brennkraftmaschine mit Schmiermittelküh­ lung, mit einem von der Kühlflüssigkeit durchströmten Ölkühler und einem Bypass zur Umgehung des Ölkühlers sowie mit einem den Bypass thermostatisch regelnden Ventil, dadurch gekennzeichnet, daß der Bypass (11) im Ölkreislauf des Ölkühlers (6) vorgesehen ist und daß die zu dem Ölkühler (6) führende Ölzulaufmenge durch das nur bei hoher Last und lediglich in Abhängigkeit von der Kühlflüssigkeitstemperatur arbeitende Ventil (12) regelbar oder absperrbar ist.1. Liquid-cooled internal combustion engine with lubricant cooling, with an oil cooler through which the coolant flows and a bypass for bypassing the oil cooler, and with a thermostatically regulating valve, characterized in that the bypass ( 11 ) is provided in the oil circuit of the oil cooler ( 6 ) and that the oil supply quantity leading to the oil cooler ( 6 ) can be regulated or shut off by the valve ( 12 ) which only works under high load and only as a function of the coolant temperature. 2. Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß das Ventil (12) als 3-Wege-Ventil ausgebildet ist.2. Internal combustion engine according to claim 1, characterized in that the valve ( 12 ) is designed as a 3-way valve. 3. Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß das Ventil (12) als Absperrventil ausgebildet ist.3. Internal combustion engine according to claim 1, characterized in that the valve ( 12 ) is designed as a shut-off valve.
DE19944400201 1994-01-05 1994-01-05 Liquid-cooled internal combustion engine with lubricant cooling Withdrawn DE4400201A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19944400201 DE4400201A1 (en) 1994-01-05 1994-01-05 Liquid-cooled internal combustion engine with lubricant cooling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19944400201 DE4400201A1 (en) 1994-01-05 1994-01-05 Liquid-cooled internal combustion engine with lubricant cooling

Publications (1)

Publication Number Publication Date
DE4400201A1 true DE4400201A1 (en) 1995-02-02

Family

ID=6507503

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19944400201 Withdrawn DE4400201A1 (en) 1994-01-05 1994-01-05 Liquid-cooled internal combustion engine with lubricant cooling

Country Status (1)

Country Link
DE (1) DE4400201A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512783A1 (en) * 1995-04-05 1996-10-10 Bayerische Motoren Werke Ag Device for influencing the transmission oil temperature in motor vehicles
FR2832188A1 (en) 2001-11-10 2003-05-16 Daimler Chrysler Ag I.c. engine cooling circuit has heat exchanger with branch that can be separated from circuit and/or regulated by valve
WO2007000625A1 (en) * 2005-06-29 2007-01-04 Al-Khateeb Osama Othman Mostae Oil cooling system to provide enhanced thermal control for combustion engines
FR2904857A1 (en) * 2006-08-09 2008-02-15 Peugeot Citroen Automobiles Sa Heat engine cooling circuit control device for vehicle i.e. motocar vehicle, has valves to occupy position to circulate oil in line at temperature value, and another position to circulate oil in exchanger at another temperature value
DE102007045346A1 (en) 2007-09-22 2009-01-29 Daimler Ag Oil-cooling-filter arrangement in internal combustion engine of motor vehicles, has oil supply line, heat exchanger, filter unit, bypass unit and oil-return line

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1576706B2 (en) * 1967-04-20 1975-07-03 Daimler-Benz Ag, 7000 Stuttgart Liquid-cooled internal combustion engine with lubricant cooling
DE2337476B2 (en) * 1973-07-24 1976-10-07 Daimler-Benz Ag, 7000 Stuttgart LIQUID-COOLED COMBUSTION MACHINE WITH LUBRICANT COOLING
DE3622378A1 (en) * 1986-07-03 1988-01-14 Kloeckner Humboldt Deutz Ag COOLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1576706B2 (en) * 1967-04-20 1975-07-03 Daimler-Benz Ag, 7000 Stuttgart Liquid-cooled internal combustion engine with lubricant cooling
DE2337476B2 (en) * 1973-07-24 1976-10-07 Daimler-Benz Ag, 7000 Stuttgart LIQUID-COOLED COMBUSTION MACHINE WITH LUBRICANT COOLING
DE3622378A1 (en) * 1986-07-03 1988-01-14 Kloeckner Humboldt Deutz Ag COOLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512783A1 (en) * 1995-04-05 1996-10-10 Bayerische Motoren Werke Ag Device for influencing the transmission oil temperature in motor vehicles
FR2832188A1 (en) 2001-11-10 2003-05-16 Daimler Chrysler Ag I.c. engine cooling circuit has heat exchanger with branch that can be separated from circuit and/or regulated by valve
WO2007000625A1 (en) * 2005-06-29 2007-01-04 Al-Khateeb Osama Othman Mostae Oil cooling system to provide enhanced thermal control for combustion engines
FR2904857A1 (en) * 2006-08-09 2008-02-15 Peugeot Citroen Automobiles Sa Heat engine cooling circuit control device for vehicle i.e. motocar vehicle, has valves to occupy position to circulate oil in line at temperature value, and another position to circulate oil in exchanger at another temperature value
EP1892389A1 (en) * 2006-08-09 2008-02-27 Peugeot Citroen Automobiles SA Device making it possible to control a circuit for circulation of a coolant liquid and a circuit for circulation of lubrication oil of a heat engine of a vehicle
DE102007045346A1 (en) 2007-09-22 2009-01-29 Daimler Ag Oil-cooling-filter arrangement in internal combustion engine of motor vehicles, has oil supply line, heat exchanger, filter unit, bypass unit and oil-return line

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Legal Events

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OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
OP8 Request for examination as to paragraph 44 patent law
8130 Withdrawal