EP2567083B1 - Système de préchauffage destiné au préchauffage de gros moteurs diesel - Google Patents

Système de préchauffage destiné au préchauffage de gros moteurs diesel Download PDF

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Publication number
EP2567083B1
EP2567083B1 EP11717999.4A EP11717999A EP2567083B1 EP 2567083 B1 EP2567083 B1 EP 2567083B1 EP 11717999 A EP11717999 A EP 11717999A EP 2567083 B1 EP2567083 B1 EP 2567083B1
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EP
European Patent Office
Prior art keywords
temperature
low
temperature circuit
preheating
circuit
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.)
Active
Application number
EP11717999.4A
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German (de)
English (en)
Other versions
EP2567083A2 (fr
Inventor
Stefan Hintermeir
Franz MÜHL
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
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Priority to PL11717999T priority Critical patent/PL2567083T3/pl
Publication of EP2567083A2 publication Critical patent/EP2567083A2/fr
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Publication of EP2567083B1 publication Critical patent/EP2567083B1/fr
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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
    • F01P7/165—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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
    • F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
    • F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
    • 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
    • F01P2060/18—Heater

Definitions

  • the invention relates to a preheating plant for heating a diesel engine, which has a high-temperature circuit and a low-temperature circuit, with a circulation pump and a preheating unit for circulating and heating a heat exchange fluid, wherein an inlet, in which a feed branch for connection of the high-temperature circuit and the low-temperature circuit is arranged, and a return are provided, in which a return branch for connection of the high-temperature circuit and the low-temperature circuit is arranged.
  • Such a preheating circuit is known from practice. Diesel engines, and in particular large diesel engines, which are used in locomotives or railcars of a rail vehicle can not be started when cold. For this reason, in vehicles with such a diesel engine, a preheating system is provided which is driven electrically or by means of fuel. In order to introduce the required heat into the cold diesel engine, the cooling liquid of the diesel engine is heated, wherein the cooling liquid is circulated through a preheating circuit. The cooling liquid, which in the later diesel operation ensures the cooling of the diesel engine, thus serves as a warming medium in the cold system.
  • the preheating plant has a high and low temperature circuit, wherein a circulating pump and a preheating unit are provided for circulating and heating a heat exchange liquid.
  • a circulating pump and a preheating unit are provided for circulating and heating a heat exchange liquid.
  • an inlet is disclosed, with which the high-temperature circuit and the low-temperature circuit can be connected.
  • the high temperature circuit is mainly used to cool the cylinder heads and cylinder liners.
  • engine oil coolers, exhaust gas recirculation systems and other components can be used via the high temperature circuit be cooled.
  • the low-temperature circuit serves to cool the combustion air, which was previously heated by compression in a turbocharger. The cooling of the combustion air causes the combustion process of the diesel engine, a higher power output.
  • further assemblies can be integrated in the low-temperature circuit. The reason for the formation of two independent cooling circuits in a diesel engine can be seen in the different operating temperatures required for their particular application.
  • both the high-temperature circuit and the low-temperature circuit are each equipped with their own radiator, which allows the release of heat during operation of the diesel engine.
  • both cooling circuits have radiator thermostats connected to a bypass of the respective radiator and to the radiator itself. When cold, each radiator thermostat opens to the bypass, so that when preheating the cooling water is not circulated through the respective radiator. However, when the cooling water reaches an operating temperature previously set on the radiator thermostat, the radiator thermostat opens to the radiator and closes the bypass, so that the circulation then takes place only via the respective radiator. Since the operating temperatures of the high-temperature circuit and the low-temperature circuit are different, the respective radiator thermostats also open the circulation to the radiator at different temperatures.
  • both the high-temperature circuit and the low-temperature circuit are connected to an inlet or a return of a preheating system, so that a preheating circuit is formed in which a heat exchange fluid circulates over the high and low temperature sections of the diesel engine becomes.
  • the preheated heat exchange fluid is thus passed over both cooling circuits.
  • both radiator thermostats are only open towards the bypass, so that the preheated heat exchange fluid is not conducted via the radiator. Since the operating temperatures of the cooling circuits are different, one of the radiator thermostats, namely the radiator thermostat of the low temperature circuit, opens before the operating temperature of the high temperature circuit is reached. As a result, the heat introduced via the cooler of the low-temperature circuit is returned to the outside environment during preheating. The resulting energy loss is undesirable. In addition, the preheating slows down.
  • the object of the invention is therefore to provide a preheating of the type mentioned, with the preheating losses can be avoided as much as possible and accelerates the preheating.
  • the invention solves this problem in that the flow branch and / or return branch is formed by a respective thermostatic valve / each thermostatic valve allows circulation of the heat exchange fluid either in the high-temperature circuit or the low-temperature circuit in response to a switching temperature.
  • a thermostatic valve is arranged in the flow of Vorierrm Ahmedes, which arises after the connection of the flow and the return of the preheater with the high-temperature circuit and the low-temperature circuit of the diesel engine, which represents a switchable branch point.
  • the thermostatic valve can be determined whether the heat exchange fluid for heating the diesel engine is circulated either via the high-temperature circuit or via the low-temperature circuit. In this way, it is possible to direct the circulation process selectively via one of the two circuits or then cancel, for example, when the required operating temperature is reached. In this way, losses can be avoided and the preheating phase can thus be shortened.
  • each thermostatic valve is connected to a temperature sensor which provides a control signal for opening or closing the thermostatic valve.
  • thermostatic valve and temperature sensor are designed as two separate components.
  • the thermostatic valve remotely controllable by the temperature sensor, wherein the temperature sensor at any point in the diesel engine, for example in the low-temperature cooling circuit, can be arranged.
  • the connection between the thermostatic valve and the temperature sensor for example, a mechanical connection, wherein the extension of a temperature-sensitive substance or a temperature-sensitive material in the temperature sensor via a closed media line is transmitted hydraulically or pneumatically to the thermostatic valve.
  • the connection is an electrical signal connection, for example a cable-controlled communication line.
  • a wireless communication connection for example via radio, Bluetooth or the like, between the temperature sensor and thermostatic valve is possible.
  • a very specific linking of the switching operation of the thermostatic valve with the temperature of a suitable component or cooling circuit of the diesel engine is made possible.
  • the switching of the thermostatic valve can be done quickly, so that either a circulation takes place only via the high-temperature circuit or only via the low-temperature circuit. Notwithstanding this, the switching takes place gradually, that is, so slowly that over a period of time that is relevant with regard to a detectable heat exchange, the circulation occurs both via the low-temperature and the high-temperature circuit.
  • the temperature sensor in the low-temperature circuit can be arranged and set up for detecting the temperature of a heat exchange fluid in the low-temperature circuit.
  • the thermostatic valve is set so that initially the low-temperature circuit is heated by the preheating plant according to the invention, wherein the connection of the flow is interrupted with the high-temperature circuit.
  • the thermostatic valve switches over so that the circulation pump of the preheating system circulates the heated heat exchange fluid at least also via the high-temperature circuit.
  • the thermostatic valve works preferably mechanically, namely by thermal expansions of thermostatic cartridges, which can also be located away from the valve.
  • the switching temperature is below an opening temperature of a radiator thermostat of the low-temperature circuit or the high-temperature circuit. If, for example, the connection between the flow and low-temperature circuit is first opened by the thermostatic valve, the diesel engine is heated via the low-temperature circuit. Just before the temperature of the heat exchange medium in the low-temperature circuit reaches the switching temperature of the radiator thermostat of the low-temperature circuit and this would then release the connection to the radiator with heat loss to entourage, the thermostatic valve interrupts the circulation through the low-temperature circuit and opens the connection between flow and high-temperature circuit, so that this is heated until the operating temperature is reached.
  • the flow branch check valves are arranged downstream.
  • the check valves prevent the coolant from being circulated through the components of the preheater after preheating with the diesel engine running.
  • each thermostatic valve connected to the high-temperature circuit high-temperature bypass and connectable to the low-temperature circuit low-temperature bypass is connected in parallel, wherein shut-off valves are arranged in the high-temperature bypass and in the low-temperature bypass.
  • the shut-off valves are controllable shut-off valves. Controllable shut-off valves, for example, from the cab of the Rail vehicle are operated remotely. Notwithstanding this, the shut-off valves are manually operated shut-off valves.
  • FIG. 1 shows a first embodiment of the preheating plant 1 according to the invention, which has a preheating unit 2 for heating a heat exchange fluid and a circulating pump figuratively not shown, which circulates the heated heat exchange fluid via a flow 3 and a return 4.
  • the preheating system 1 further has a power supply, not shown here, here a battery, for powering the preheating unit 2 and the circulation pump.
  • the flow 3 and the return 4 each have a branch point 5 and 6, with which the flow 3 is split into the flow branches 3 H and 3 T. At the branch point 6 return branches 4 H and 4 T are combined.
  • the preheating system 1 is connected to the cooling system of a diesel engine 7. Said cooling system forms a high-temperature region or, in other words, high-temperature circuit 8 and a low-temperature region or low-temperature circuit 9.
  • the flow 3 of the preheater 1 is connected via the Vormérmzweig 3 H with the high-temperature circuit 8 and the preheating branch 3 T with the low-temperature circuit 9 input, the high-temperature circuit 8 output side connected to the return branch 4 H and the low-temperature circuit 9 on the output side with the return branch 4 T. is.
  • Heat exchange points 11 and 12 of the diesel engine of the high-temperature circuit 8 and the low-temperature circuit 9 are also shown schematically.
  • the high-temperature circuit 8 has a high-temperature radiator thermostat 13.
  • the low-temperature circuit 9, however, has a low-temperature cooling thermostat 14.
  • the radiator thermostats 14, 13 are each connected to a radiator 15, which is provided by a fan 16.
  • each cooler 15 can be bypassed via a bypass 17 when the temperature of a heat exchange liquid detected by the respective radiator thermostat 13 or 14 on the input side is smaller than the operating temperature set at the respective radiator thermostat 13, 14.
  • the temperature detection of the respective radiator thermostats 13 and 14 is in FIG. 1 represented by the dashed line. In the cold state, the respective fan 16 is bridged both in the high-temperature circuit 8 and in the low-temperature circuit 9.
  • the flow branching point 5 is formed by a thermostatic valve 18, which is connected to a temperature sensor, which is not shown in the figure, in the diesel engine 7 at the heat exchange point 12 via a communication connection 19.
  • the communication connection 19 is either a media line which transmits the expansion of the temperature-sensitive substance from the temperature sensor to the thermostatic valve, or an electrical or optical data transmission line via which the measurement signals provided on the output side by the temperature sensor are transferred to the thermostatic valve 18.
  • the mode of action of in FIG. 1 shown preheating system is as follows: To start the diesel engine 7 this must be heated.
  • the preheating unit 2 has the electrically or fuel-operated operated preheating unit 2, which heats the heat exchange fluid.
  • the likewise driven by the battery of the preheating, not shown circulating pump circulates the heated heat exchange fluid via the flow 3 and the thermostatic valve 18, wherein the flow 3 is initially connected only via the flow branch 3 T with the low-temperature circuit 9.
  • the heated heat exchange fluid thus enters from the flow 3 in the low-temperature circuit 9 and flows through the return branch 4 T then in the return 4 of the preheater 1.
  • the preheating is thus formed by the flow 3, the low-temperature circuit 9 and the return 4.
  • the thermostatic valve 18 is set to a switching temperature. Exceeds the temperature of the heat exchange fluid in the low-temperature circuit 9, the switching temperature, the thermostat valve 18 switches the flow 3, so that it is connected via the flow branch 3 H only with the high-temperature circuit 8.
  • the operating temperature of the thermostatic valve 18 is just below the switching temperature of the low-temperature radiator thermostat 14, so that the radiator 15 remains bridged during preheating and no unwanted heat loss occurs.
  • the preheating circuit is then formed by the flow 3, the high-temperature circuit 8 and the return 4. If the preheating circuit 8 also reaches operating temperature, the diesel engine 7 can be started.
  • An expedient display in the driver's cab clarifies the heating state of the diesel engine 7.
  • the circulation pumps of the low-temperature circuit 9 and of the high-temperature circuit 8 are switched off.
  • the preheating system is switched off.
  • the circulation pumps of the diesel engine cooling in FIG. 1 not shown, the circulation of the heat exchange liquid opposite to the direction indicated by the arrows in the figure.
  • the preheating system 1 can then be bridged.
  • FIG. 2 shows a further embodiment of the preheating system 1 according to the invention, which largely the in FIG. 2 shown preheating plant 1, but in the flow 3 of the aforementioned Appendix 1, both in the flow branch 3 H and in the flow branch 3 T check valves 20 are arranged to prevent the heat exchange fluid in diesel mode set to the in FIG. 1 shown direction is circulated through the preheating system 1.
  • FIG. 3 shows a further embodiment of the preheating system 1 according to the invention, wherein the thermostatic valve 18 is once bridged by a high-temperature bypass 21 and a low-temperature bypass 22.
  • the high temperature bypass 21 and the low-temperature bypass 22 each have an electrically controllable shut-off valve 23.
  • the input side of the thermostatic valve 18, a further controllable shut-off valve 23 is arranged.
  • the shut-off valves 23 it is possible to selectively connect either the high-temperature circuit 8 and low-temperature circuit 9 and both temperature circuits simultaneously with the preheater 1, wherein the inlet side of the thermostatic valve 18 arranged shut-off valve 23 is transferred to its blocking position.
  • Such a decoupled from the thermostat 18 connection of the cooling circuits 8, 9 with the preheater 1 is desired, for example, in Zuloom vulgar thought in which the preheater 1 with running diesel engine 7 continues to provide heat for rapid heating of the diesel engine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Air-Conditioning For Vehicles (AREA)

Claims (8)

  1. Système (1) de préchauffage d'un moteur diesel, qui a un circuit (8) de haute température et un circuit (9) de basse température, comprenant une pompe de recirculation et une unité (2) de préchauffage pour la recirculation et le réchauffage d'un liquide d'échange de chaleur, dans lequel il est prévu une arrivée (3), dans laquelle est montée une bifurcation (5) d'arrivée pour le raccordement du circuit (8) de haute température et du circuit (9) de basse température et un retour (4), dans lequel est montée une bifurcation (6) de retour pour le raccordement du circuit (8) de haute température et du circuit (9) de basse température,
    caractérisé en ce que
    la bifurcation (5) d'arrivée et/ou la bifurcation (6) de retour est/sont formées par, respectivement, une soupape (8) thermostatique, chaque soupape (8) thermostatique rendant possible une recirculation du liquide d'échange de chaleur, soit dans le circuit (8) de haute température, soit dans le circuit (9) de basse température en fonction d'une température de commutation.
  2. Système (1) de préchauffage suivant la revendication 1,
    caractérisé en ce que
    chaque soupape (18) thermostatique est reliée à un capteur de température, qui procure un signal de commande pour l'ouverture ou la fermeture de la soupape thermostatique.
  3. Système (1) de préchauffage suivant la revendication 2,
    caractérisé en ce que
    le capteur de température peut être monté sur le circuit (9) de basse température et, pour la détection de la température d'un liquide d'échange de chaleur, est mis dans le circuit (9) de basse température.
  4. Système (1) de préchauffage suivant la revendication 2,
    caractérisé en ce que
    la sonde de température peut être montée sur une pièce (12) du moteur diesel.
  5. Système (1) suivant l'une des revendications précédentes,
    caractérisé en ce que
    la température de commutation est inférieure à une température d'ouverture d'un thermostat (13, 14) de refroidisseur du circuit (9) de basse température ou du circuit (8) de haute température.
  6. Système (1) suivant l'une des revendications précédentes,
    caractérisé en ce que
    des clapets antiretour (20) sont montés en aval de la bifurcation (5) d'arrivée.
  7. Système (1) suivant l'une des revendications précédentes,
    caractérisé en ce que
    à chaque soupape (18) thermostatique est montée, en parallèle, une dérivation (21) de haute température pouvant communiquer avec le circuit (18) de haute température et une dérivation (22) de basse température pouvant communiquer avec le circuit (9) de basse température, des vannes (23) d'arrêt étant montées dans la dérivation (21) de haute température et dans la dérivation (22) de basse température.
  8. Système (1) suivant la revendication 7,
    caractérisé en ce que
    les vannes d'arrêt sont des vannes (23) d'arrêt qui peuvent être commandées.
EP11717999.4A 2010-05-03 2011-04-27 Système de préchauffage destiné au préchauffage de gros moteurs diesel Active EP2567083B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11717999T PL2567083T3 (pl) 2010-05-03 2011-04-27 Instalacja ogrzewania wstępnego do ogrzewania wstępnego dużych silników diesla

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010019664A DE102010019664A1 (de) 2010-05-03 2010-05-03 Vorwärmanlage zum Vorwärmen großer Dieselmotoren
PCT/EP2011/056597 WO2011138194A2 (fr) 2010-05-03 2011-04-27 Système de préchauffage destiné au préchauffage de gros moteurs diesel

Publications (2)

Publication Number Publication Date
EP2567083A2 EP2567083A2 (fr) 2013-03-13
EP2567083B1 true EP2567083B1 (fr) 2014-10-01

Family

ID=44118923

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11717999.4A Active EP2567083B1 (fr) 2010-05-03 2011-04-27 Système de préchauffage destiné au préchauffage de gros moteurs diesel

Country Status (4)

Country Link
EP (1) EP2567083B1 (fr)
DE (1) DE102010019664A1 (fr)
PL (1) PL2567083T3 (fr)
WO (1) WO2011138194A2 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1223196B (de) * 1962-12-24 1966-08-18 Kloeckner Humboldt Deutz Ag Fluessigkeitskuehlanlage fuer aufgeladene Brennkraftmaschinen
DE10006873B4 (de) * 1999-10-16 2006-09-14 Richard Ambros Verfahren zur exakten Temperaturregelung eines für die Motorkühlung und die Beheizung eines Fahrzeuges vorgesehenen Kühlwassers
US7028915B2 (en) * 2001-04-27 2006-04-18 Electro-Motive Diesel, Inc. Layover heating system for a locomotive
DE102005029918B4 (de) * 2005-04-29 2010-05-06 Mtu Friedrichshafen Gmbh Kühlsystem für eine aufgeladene Brennkraftmaschine
DE102008032529A1 (de) * 2008-07-10 2010-01-14 Volkswagen Ag Verfahren zum Betrieb eines Kühlmittelkreislaufs und eine mit einem Wärmetauscher ausgestattete Einrichtung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
WO2011138194A3 (fr) 2011-12-29
EP2567083A2 (fr) 2013-03-13
WO2011138194A2 (fr) 2011-11-10
PL2567083T3 (pl) 2015-03-31
DE102010019664A1 (de) 2011-11-03

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