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US20010042525A1 - Control arrangement for a cooling circuit of an internal combustion engine - Google Patents

Control arrangement for a cooling circuit of an internal combustion engine Download PDF

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Publication number
US20010042525A1
US20010042525A1 US09/841,318 US84131801A US2001042525A1 US 20010042525 A1 US20010042525 A1 US 20010042525A1 US 84131801 A US84131801 A US 84131801A US 2001042525 A1 US2001042525 A1 US 2001042525A1
Authority
US
United States
Prior art keywords
circuit
radiator
coolant
valve
control
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.)
Abandoned
Application number
US09/841,318
Other languages
English (en)
Inventor
Kai Lehmann
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.)
Mercedes Benz Group AG
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to DAIMLERCHRYSLER AG reassignment DAIMLERCHRYSLER AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VON EY, PETER, JUNGE, DIETER
Publication of US20010042525A1 publication Critical patent/US20010042525A1/en
Abandoned 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
    • F01P2031/00—Fail safe
    • F01P2031/32—Deblocking of damaged thermostat
    • 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
    • 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

Definitions

  • the invention relates to a control device for a cooling circuit of an internal combustion engine of the type which includes a radiator, a coolant pump and a cooling circuit including the radiator and the internal combustion engine.
  • a control device of the general type with which the present invention is concerned is known from U.S. Pat. No. 4,644,909. However, this control device is not capable of assuming all the position required to control the cooling circuit of an internal combustion engine.
  • DE 43 24 749 A1 describes a regulating valve in which an inlet can be connected to up to three outlets by means of a rotary valve.
  • the inlet is mounted radially on the circumferential wall of the valve housing. This however can lead to considerable problems with installation space in various applications. Moreover, this arrangement results in sealing problems, which are overcome only by a complex and expensive design.
  • thermostatic valves are provided which control a short circuit by-passing the radiator depending on the coolant temperature during the warm-up phase of the internal combustion engine. Then, when the internal combustion engine has sufficiently warmed up, a mixed-mode of operation is initiated during a transition period wherein some of the coolant continues to be conducted through the short circuit and some of it is already passed through a radiator. In the subsequent normal operation, the coolant is generally conducted completely through the radiator of the cooling circuit.
  • DE 44 38 552 C1, DE 44 38 237 C1, and DE 42 31 649 C2 are mentioned by way of example.
  • thermostatic valves respond very slowly to temperature changes. Moreover, they are limited to one controlled variable, namely a particular opening temperature. Furthermore, they suffer from high pressure losses for the coolant flowing therethrough.
  • DE 41 25 366 C1 discloses a 3/2-way valve for liquid flow circuits in vehicles.
  • This valve has an axial inlet and two radial outlets.
  • the above-mentioned valve serves as a distributor valve or mixing valve in a liquid circuit used to heat space in motor vehicles and is also used in a liquid flow circuit for cooling spaces in motor vehicles. Moreover, mixed-mode operation between heating and cooling is also possible with this valve.
  • the control element includes flow control means for selectively establishing a flow circuit through either one or both of the radiator and radiator by-pass flow circuits and also for blocking both the radiator and radiator by-pass flow circuits providing for rapid engine warm-up.
  • both the flow passage to the radiator circuit and the flow passage to the short circuit can be simultaneously closed by the rotary valve, there is a valve position available, in which no cooling water is permitted to flow through the internal combustion engine. As a result, the cooling water within the internal combustion engine is heated much more rapidly.
  • Another very significant advantage of the solution according to the invention is that a significant reduction in cold-starting emissions can be achieved by closing all the coolant flow circuits during cold starting and during the warm-up period of the internal combustion engine. As a result of the complete interruption of the coolant flow, not even the water in the cooling jacket of the internal combustion engine is circulated. The internal combustion engine will therefore warm up very quickly and cold-start emissions, especially hydrocarbon emissions will be greatly reduced.
  • the position of the control valve is controlled on the basis of a performance graph by appropriate means providing for an optimum coolant temperature for every engine operating state. This likewise helps to reduce wear of the internal combustion engine and also to reduce fuel consumption. Furthermore, the pressure losses of the coolant in the cooling circuit are reduced which allows a corresponding reduction in the driving power for operating the coolant pump, which also has a positive effect on fuel consumption.
  • a further reduction in auxiliary power requirements and therefore in fuel consumption and hence a reduction in emissions is achieved by a cooling water inlet flow restriction when the demand for cooling water is very low and the control valve upstream of the water pump is in a corresponding restrictive position.
  • the control valve according to the invention can be disposed at any point in the cooling circuit. It can be incorporated advantageously into the coolant pump, for example, preferably into the suction port of the pump, or into the radiator. It can also be arranged in, or on, the timing belt or chain casing of the internal combustion engine.
  • FIG. 1 shows a cooling circuit with the control device according to the invention in a cold start and warm-up state wherein all the cooling water flow circuits are closed
  • FIG. 2 shows the cooling circuit according to FIG. 1 in an engine warm-up state, wherein the by-pass coolant flow circuit short circuiting the radiator fully open,
  • FIG. 3 shows the cooling circuit according to FIG. 1 in mixed-mode operation with coolant flow through the short circuit and the radiator circuit
  • FIG. 4 shows the cooling circuit according to FIG. 1 with the radiator circuit completely open, and the short circuit closed
  • FIG. 5 shows a simplified embodiment of the control valve according to the invention as a control element in the position for cold starting in accordance with the cooling circuit shown in FIG. 1,
  • FIG. 6 shows the control valve according to FIG. 5 in the engine warm-up position in accordance with the cooling circuit shown in FIG. 2,
  • FIG. 7 shows the control valve according to FIG. 5 in the mixed-mode position in accordance with the cooling circuit shown in FIG. 3, and
  • FIG. 8 shows the control valve according to FIG. 5 in the position for maximum cooling in accordance with the circuit shown in FIG. 4.
  • FIGS. 1 to 4 The cooling circuit illustrated in FIGS. 1 to 4 is of a fundamentally known type, for which reason a more detailed discussion will be restricted below to those components and coolant flow arrangements that are significant for the invention.
  • An internal combustion engine 1 cooled by a cooling water circuit is connected to a radiator circuit 2 , in which there is a radiator 3 as a heat exchanger, and to a short circuit by-passing the radiator 3 .
  • a control valve 5 as a control element for controlling the coolant flow in the cooling circuit.
  • a coolant pump 6 which is used to circulate the coolant through the engine 1 .
  • Branching off from the radiator circuit 2 is a heating circuit 7 , in which there is a heat control valve 8 , a heater 9 and a pump 10 .
  • the heating circuit 7 leads to the inlet side of the coolant pump 6 downstream of the control valve 5 .
  • the configuration chosen for the control valve 5 should be one that allows four positions, namely a total shut-off position (FIG. 1), a position in which the coolant, generally water, is passed exclusively via the short circuit (FIG. 2), a position in which the coolant is passed exclusively via the radiator circuit 2 (FIG. 4) and another position, in which mixed-mode operation, i.e. partial opening of the short circuit 4 and of the radiator circuit 2 , is possible (FIG. 3).
  • FIG. 1 shows the cooling circuit, in which the control valve 5 is in a total shut-off position, with the result that both the short circuit 4 and the radiator circuit 2 are closed.
  • the regulating valve 8 for the heating circuit 7 is likewise closed.
  • the control valve 5 is in a position in which the radiator circuit 2 is shut off, but the short circuit 4 by passing the radiator 3 is open.
  • FIG. 4 represents the circuit configuration in all the cooling water of the internal combustion engine 1 flows through the radiator circuit as it occurs during normal engine operation, the short circuit 4 being fully closed.
  • a control device (not shown) can be used to ensure that the flow of coolant through the internal combustion engine 1 is interrupted.
  • the seat control valve 8 can be opened partially or fully to heat the interior of the vehicle's passenger compartment.
  • the control valve 5 can be operated in any desired manner, e.g. by electric motor 5 ′. If operated by an electric motor, the valve can be controlled for any desired position. For optimum operation, a control valve will be provided for this purpose, with control variables being provided by an engine performance graph.
  • the arrangement could be such that the radiator circuit 2 is opened in such an emergency situation. This can be achieved in a simple manner, e.g. by employing an appropriate spring return system to ensure that the control valve 5 is moved to a position in which the radiator circuit 2 is opened whenever a failure occurs.
  • FIGS. 5 to 8 illustrate the principle on which a control valve 5 , is based purely in an exemplary manner.
  • the control valve 5 is designed in such a way that it has a rotary spool 11 in the form of a sleeve, which is arranged in a cylindrical valve housing 12 so as to be rotatable about its longitudinal axis.
  • the rotary spool 11 is provided with an axial common flow connection 13 at one end while being closed at the other end.
  • the spool is provided with a driving device (not shown) for rotating the spool about its longitudinal axis.
  • the valve housing 12 is likewise closed at the end remote from the driving device (not shown).
  • the rotary spool 11 has a control opening 14 in its circumferential wall.
  • the valve spool 11 has a cylindrical wall with a control opening 14 and extends circumferentially over an angle of more than 180°, preferably about 190 to 200°.
  • the valve housing 12 In its cylindrical circumferential wall, the valve housing 12 has an opening for a connection 15 to the short circuit 4 and a connection 16 to the radiator circuit 2 .
  • the connections 15 and 16 each represent inlets, while the common connection 13 forms the outlet connected to the coolant pump.
  • FIG. 5 shows the position of the rotary spool 11 in which, as shown in FIG. 1, both the radiator circuit 2 and the short circuit 4 are closed.
  • FIG. 6 shows the position of the rotary spool 11 in which, in accordance with the circuit arrangement shown in FIG. 2, the coolant circulates through the short circuit 4 .
  • the position of the rotary spool 11 is chosen in such a way that the connection 15 is completely open.
  • a partial opening with correspondingly restricted circulation of the coolant through the short circuit 4 is also possible. This makes it possible to provide for very sensitive flow control with a continuous manner from a shut-off position in accordance with FIG. 5 to a completely open position as shown in FIG. 6.
  • FIG. 7 shows mixed-mode operation with coolant flow both through the short circuit 4 and also through the radiator circuit 2 .
  • intermediate positions with different flow rates through the radiator circuit 2 and the short circuit 4 can be selected.
  • FIG. 8 shows a cooling circuit with a cooling water flow exclusively through the radiator circuit 2 .
  • the short circuit 4 is closed.
  • restricted operation via the radiator circuit 2 by means of a corresponding intermediate position of the rotary slide 11 with partial opening of the connection 16 is possible.
  • control valve 5 may be provided.
  • a rotary spool 11 with axial, semi-axial and/or radial branches or connections are possible. It is likewise possible to use a control valve other than a rotary spool valve 11 .
  • control valve 5 on the inlet side of the coolant pump 6 as shown in the drawings also represents only one possible arrangement.
  • the valve may also be disposed at the delivery side of the coolant pump 6 , between the latter and the internal combustion engine.
  • the axial common connection 13 could act as an inlet to the control valve 5 and the connections 15 and 16 would then control the discharge of the coolant to the radiator circuit 2 and the short circuit 4 , respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
US09/841,318 1998-10-27 2001-04-24 Control arrangement for a cooling circuit of an internal combustion engine Abandoned US20010042525A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19849492A DE19849492B4 (de) 1998-10-27 1998-10-27 Steuervorrichtung für einen Kühlkreislauf einer Brennkraftmaschine
DE19849492.0 1998-10-27
PCT/EP1999/007145 WO2000025007A1 (de) 1998-10-27 1999-09-25 Steuervorrichtung für einen kühlkreislauf einer brennkraftmaschine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/007145 Continuation-In-Part WO2000025007A1 (de) 1998-10-27 1999-09-25 Steuervorrichtung für einen kühlkreislauf einer brennkraftmaschine

Publications (1)

Publication Number Publication Date
US20010042525A1 true US20010042525A1 (en) 2001-11-22

Family

ID=7885791

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/841,318 Abandoned US20010042525A1 (en) 1998-10-27 2001-04-24 Control arrangement for a cooling circuit of an internal combustion engine

Country Status (4)

Country Link
US (1) US20010042525A1 (de)
EP (1) EP1125040A1 (de)
DE (1) DE19849492B4 (de)
WO (1) WO2000025007A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050034688A1 (en) * 2003-08-14 2005-02-17 Mark Lelkes Engine cooling disc valve
US20050205683A1 (en) * 2002-03-08 2005-09-22 Manfred Schmitt Cooling circuit for an internal combustion engine
US7444962B2 (en) * 2004-03-13 2008-11-04 Daimler Ag Coolant circuit for a coolant-cooled internal combustion engine
US20090065172A1 (en) * 2005-11-04 2009-03-12 Frederic Vacca Sealed Control Valve For A Fluid Flow Circuit
CN103069697A (zh) * 2010-08-17 2013-04-24 谢夫勒科技股份两合公司 热管理模块以及带有这种热管理模块的冷却系统
US11035285B2 (en) 2015-05-20 2021-06-15 Volkswagen Aktiengesellschaft Internal combustion machine, motor vehicle, and method for operating a motor vehicle

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DE10101826B4 (de) * 2001-01-17 2006-12-21 Daimlerchrysler Ag Steuervorrichtung für den Kühlkreislauf einer Brennkraftmaschine
DE10243778A1 (de) 2002-09-20 2004-03-25 Siemens Ag Stelleinrichtung
DE10321880B4 (de) * 2003-05-15 2005-09-08 Daimlerchrysler Ag Drehschieber Thermostatventil
DE10351852A1 (de) * 2003-11-06 2005-06-16 Itw Automotive Products Gmbh & Co. Kg Kühlsystem für Verbrennungskraft in Maschinen, insbesondere für Automobile
DE102006038213B4 (de) * 2006-08-16 2010-11-11 Itw Automotive Products Gmbh & Co. Kg Thermostatventil
DE102008018296A1 (de) 2008-04-11 2009-10-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Zulaufrohr
DE102008030768A1 (de) 2008-06-28 2009-12-31 Audi Ag Anordnung eines Drehschiebers mit einer Wasserpumpe
DE102008035961A1 (de) 2008-07-31 2010-02-04 Schaeffler Kg Wärmemanagementmodul des Kühlsystems einer Verbrennungskraftmaschine
DE102009009854B4 (de) 2009-02-20 2012-05-24 Audi Ag Kühlmittelkreislauf für eine Brennkraftmaschine
DE102009014048A1 (de) 2009-03-19 2010-09-23 Schaeffler Technologies Gmbh & Co. Kg Wärmemanagementmodul mit schraubenförmig bewegtem Regelschieber
DE102010005731B4 (de) 2010-01-26 2023-10-26 Mercedes-Benz Group AG Kühlmittelfördereinheit
DE102013208193A1 (de) 2013-05-03 2014-11-06 Behr Thermot-Tronik Gmbh Elektrisch antreibbares Ventil für eine Regelung von Volumenströmen in einem Heiz- und/oder Kühlsystem eines Kraftfahrzeuges
DE102013209582A1 (de) 2013-05-23 2014-11-27 Schaeffler Technologies Gmbh & Co. Kg Drehschieberkugel für ein Thermomanagementmodul
DE102013212493B3 (de) * 2013-06-27 2014-09-25 Schaeffler Technologies Gmbh & Co. Kg Schaltbare Sperrvorrichtung, die eine Aktuatorik sowie einen Drehschieber einschließt
DE102013222157A1 (de) 2013-10-31 2015-05-21 Schaeffler Technologies AG & Co. KG Leitgeometrie innerhalb eines Drehschiebers eines Wärmemanagementmoduls
DE102013222644A1 (de) 2013-11-07 2015-05-07 Schaeffler Technologies Gmbh & Co. Kg Mehrstufig schaltbare Sperrvorrichtung mit einer Aktuatorik und Drehschiebern
DE102013222828A1 (de) 2013-11-11 2015-05-28 Schaeffler Technologies AG & Co. KG Abdichtung eines Pumpkolbens für eine Aktuatorik einer Kühlmittelpumpe
DE102013222825A1 (de) 2013-11-11 2015-05-13 Schaeffler Technologies Gmbh & Co. Kg Einzellagerung einer Drehschieberwelle mit reduziertem Radialspiel und angepasster Führungslänge
DE102014000109A1 (de) 2014-01-11 2015-07-16 Thomas Ramminger Drehventil hydraulisch betätigt mit elektronischer Regelung und Arretierung
DE102014206480A1 (de) 2014-04-04 2015-10-08 Schaeffler Technologies AG & Co. KG Wärmemanagementmodul kombiniert mit einer thermostatischen Regelung
DE102014110706A1 (de) 2014-07-29 2016-02-18 Mahle International Gmbh Ventil
DE102014110703A1 (de) 2014-07-29 2016-02-04 Mahle International Gmbh Ventil
DE102014218386A1 (de) 2014-09-12 2016-03-17 Mahle International Gmbh Ventil für eine Regelung von Volumenströmen
JP6330748B2 (ja) * 2015-07-29 2018-05-30 トヨタ自動車株式会社 内燃機関の冷却装置

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050205683A1 (en) * 2002-03-08 2005-09-22 Manfred Schmitt Cooling circuit for an internal combustion engine
US20050034688A1 (en) * 2003-08-14 2005-02-17 Mark Lelkes Engine cooling disc valve
US6920845B2 (en) * 2003-08-14 2005-07-26 Visteon Global Technologies, Inc. Engine cooling disc valve
US7444962B2 (en) * 2004-03-13 2008-11-04 Daimler Ag Coolant circuit for a coolant-cooled internal combustion engine
US20090065172A1 (en) * 2005-11-04 2009-03-12 Frederic Vacca Sealed Control Valve For A Fluid Flow Circuit
US8347831B2 (en) * 2005-11-04 2013-01-08 Valeo Systemes Thermiquest Sealed control valve for a fluid flow circuit
CN103069697A (zh) * 2010-08-17 2013-04-24 谢夫勒科技股份两合公司 热管理模块以及带有这种热管理模块的冷却系统
US11035285B2 (en) 2015-05-20 2021-06-15 Volkswagen Aktiengesellschaft Internal combustion machine, motor vehicle, and method for operating a motor vehicle

Also Published As

Publication number Publication date
DE19849492A1 (de) 2000-05-11
EP1125040A1 (de) 2001-08-22
WO2000025007A1 (de) 2000-05-04
DE19849492B4 (de) 2005-12-22

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