WO2009089827A1 - Procédé et dispositif permettant de faire fonctionner un système échangeur de chaleur dans un véhicule à moteur - Google Patents

Procédé et dispositif permettant de faire fonctionner un système échangeur de chaleur dans un véhicule à moteur Download PDF

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Publication number
WO2009089827A1
WO2009089827A1 PCT/DE2009/000043 DE2009000043W WO2009089827A1 WO 2009089827 A1 WO2009089827 A1 WO 2009089827A1 DE 2009000043 W DE2009000043 W DE 2009000043W WO 2009089827 A1 WO2009089827 A1 WO 2009089827A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
exhaust gas
cooling medium
gas heat
internal combustion
Prior art date
Application number
PCT/DE2009/000043
Other languages
German (de)
English (en)
Inventor
Reinhold Bals
Original Assignee
Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr
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 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr filed Critical Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr
Priority to EP09702501A priority Critical patent/EP2229512A1/fr
Publication of WO2009089827A1 publication Critical patent/WO2009089827A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2889—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with heat exchangers in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2046—Periodically cooling catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to a method for operating a heat exchanger system for a motor vehicle or a stationary unit with the features mentioned in the preamble of claim 1 and an associated device with the features mentioned in the preamble of claim 9.
  • DE 195 37 801 A1 discloses a motor vehicle with an internal combustion engine and an exhaust gas heat exchanger, in which a first fluid is heated.
  • the first fluid is passed through a secondary heat exchanger in which a second fluid is heated.
  • a fluid pump which is seen in the flow direction in front of the exhaust gas heat exchanger.
  • a control of the guided through the exhaust gas heat exchanger fluid In addition to the use of exhaust heat, a faster heating of the internal combustion engine or a faster start of the heating of the vehicle can take place.
  • the disadvantage here is the relatively high cost of using the heat energy of the exhaust gases through a second heat exchanger circuit, the control technology required for this and introduced in the field of exhaust gas sensor actuator (flaps).
  • DE 101 11 787 B4 describes an integrated heat and exhaust gas management unit consisting of a housing through which the exhaust gas flows, in which a catalytic converter for cleaning the exhaust gases and a unit for recovering the exhaust gas heat are arranged. Before flowing through the catalytic converter can be supplied to the exhaust gas flow, a hot gas stream for heating the catalyst during the cold start of the internal combustion engine. For this purpose, in an additional heater by fuel injection fuel is burned to obtain a desired exhaust gas temperature.
  • the integrated heat and exhaust management unit further includes a unit for recovering exhaust heat that both surrounds the catalytic converter and downstream therefrom Power connection is available to exchange for heat transfer to the heat-requiring areas of the vehicle exhaust heat with liquid heat.
  • the exhaust gas heat exchanger for recovering the exhaust gas heat is provided with an inlet and outlet for the required for indirect heat exchange with the exhaust gases cooling medium.
  • the integrated heat and exhaust management unit provides thermal energy to improve engine heating by heating engine oil for improved lubrication under cold start conditions to improve the durability of the engine. It works to reduce emissions under cold start conditions by accelerating catalyst perturbation as a result of rapid heating by the fuel injection heater and isolation of the catalytic converter by the exhaust heat recovery unit.
  • the unit can also improve the heating of the passenger compartment for increased comfort of the customer.
  • the disadvantage here is that during warming up of the internal combustion engine additionally fuel in a heater for generating additional thermal energy on the one hand for rapid heating of the catalyst and on the other hand for heating the cold cooling medium is needed.
  • additional energy is needed for the operation of a blower in order to be able to supply the heated gas to the exhaust gas stream.
  • the system is expensive by complex control devices.
  • the invention has for its object to provide a method and associated apparatus for operating a heat exchanger system for motor vehicles, with the / the disadvantages of the prior art can be eliminated and with the / a fast operating temperature of the catalyst and rapid heat recovery without additional energy input is achieved. In addition, an overheating of the heat exchanger system passing through the cooling medium should be avoided.
  • the device according to the invention is characterized in that before the exhaust gas heat exchanger, the supply line for the cooling medium via a first adjustable valve with a compressed air line and the discharge line for the cooling medium is connected to the exhaust gas heat exchanger via a second adjustable valve with an air line.
  • the exhaust gas heat exchanger is designed such that it consists in cross section of a plurality of over and juxtaposed heat exchanger tubes whose outer surface is formed as a catalytically active surface and is integrated into the catalyst.
  • the advantages of the solution according to the invention are that the thermal mass in the exhaust gas heat exchanger is reduced during the warm-up phase of the internal combustion engine from the cold start. Instead of the exhaust gas flowing through the exhaust gas heat exchanger cold cooling medium is in the warm-up phase in the heat exchanger tubes of the exhaust gas heat exchanger only a non-moving air flow. This ensures that the catalytic part of the heat exchanger system is heated faster and thus reaches its operating temperature faster. A heat dissipation through the cooling medium from the catalyst in the warm-up phase of the internal combustion engine is not carried out. An additional heater for heating the exhaust gases in the warm-up phase of the internal combustion engine, thereby quickly reaching the light-off temperature of the catalyst, is no longer necessary. The costs of heating and fuel consumption for operating ben the heating thus omitted.
  • the solution according to the invention is characterized by an uncomplicated structure, which can be well controlled even with simple known means.
  • Fig. 1 a schematic representation of a heat exchanger system for a
  • FIG. 3 shows a variant of a heat exchanger system for a motor vehicle
  • FIG. 4 shows a schematic representation of the exhaust gas heat exchanger according to FIG. 3 in detail
  • Fig. 5 a cross section through the exhaust gas heat exchanger.
  • the known per se heat exchanger system for a motor vehicle consists of a guided via an internal combustion engine 12 and a radiator 16 main cooling circuit and a run on the internal combustion engine 12 and an engine oil cooler 14 subcooling circuit whose coolant temperature is monitored by a thermostat 15.
  • the cooling circuit is associated with an expansion tank 17 for the cooling medium 21.
  • To support the circulation of the cooling medium 21 and 22 are arranged in the cooling and the secondary circuit to be described coolant pump 13. About the coolant circuit and a vehicle heater 18 is also known manner operated.
  • an exhaust gas heat exchanger 1 is arranged, which is flowed through by the exhaust gases 2 of the internal combustion engine 12 and the via a supply line 5, a cooling medium 21 or 22 is supplied.
  • the supply line 5 is connected to the heat exchanger tubes 10 arranged side by side and one inside the exhaust gas heat exchanger 1.
  • the heat exchanger tubes 10 are combined in a discharge line 7 opening out from the exhaust gas heat exchanger 1.
  • the outer surfaces of the arranged inside the exhaust heat exchanger 1 heat exchanger tubes 10 are formed as catalytically active surfaces 20, which thus form a catalyst.
  • the catalytic surface 20 of the heat exchanger tubes 10 is formed ribbed.
  • the arrangement of the heat exchanger tubes 10 can be seen in FIG.
  • a valve 3 whose further connection is connected to a compressed-air line 4, is arranged in the exhaust gas heat exchanger 1 in the supply line 5 before the confluence of the supply line 5.
  • the compressed air line 4 communicates with a pressure accumulator of the motor vehicle.
  • a further valve 3 ' is angeodnet, which is connected to an air line 8, which opens into the surge tank 17.
  • the valves 3 and 3 ' are connected to each other via a bypass line 6, so that when a corresponding Chenden switching position of the valves 3 and 3 ', the cooling medium 21 or 22 is not passed through the exhaust gas heat exchanger 1.
  • FIG. 3 shows a variant of the coolant guide.
  • the heat exchanger 19 forms with the exhaust gas heat exchanger 1 a secondary circuit in which a cooling medium 22 circulates.
  • the exhaust gas heat exchanger 1 is supplied via the supply line 5 either a cooling medium 21 or the cooling medium 22.
  • the cooling medium 21 and 22 may be engine oil or a mixture of water with a high enthalpy of vaporization medium such as glycol, ammonia, ethanol, methanol, acetic acid or CO2.
  • the coolant 22, for example, ammonia in order to achieve a high heat recovery and allows the use of a known separate expansion machine.
  • the thermal mass of the cooling medium 21 or 22 flowing through the exhaust gas heat exchanger 1 is reduced.
  • the flow through the cooling medium 21 or 22 is interrupted by the arranged in the exhaust gas heat exchanger 1 heat exchanger tubes 10 through the valve 3.
  • a gas stream 23 is supplied to the heat exchanger tubes 10 via the valve 3, which displaces the cooling medium 21 or 22 from the heat exchanger tubes 10.
  • the gas stream 23 preferably corresponds to compressed air from the compressed air system of the motor vehicle.
  • the valves 3 and 3 ' are closed so that there is a non-moving amount of air in the heat exchanger tubes 10. It is thus achieved that the exhaust gases 2 of the internal combustion engine 12 rapidly heat the catalytic surface 20 of the heat exchanger tubes 10 so that they rapidly reach the light-off temperature for the catalytic purification of the exhaust gases 2.
  • the cooling medium 21 or 22, bypassing the exhaust gas heat recovery shear 1 are supplied from the supply line 5 via the bypass line 6 of the discharge line 7. It is also conceivable to interrupt the circulation of the coolant 21 or 22 by closing the valve 3.
  • the heat exchanger tubes 10 of the exhaust gas heat exchanger 1 are vented.
  • the valve 3 ' is adjusted so that the air can escape via the air line 8 and is vented in the expansion tank 17.
  • the valves 3 and 3 ' are then switched so that the cooling medium 21 or 22, the heat exchanger tubes 10 of the exhaust gas heat exchanger 1 flow through.
  • a medium 11 which is either a heat exchanger tubes 10 flowing through the cooling medium 21 or 22 or a non-moving amount of air.
  • the exhaust gases 2 are thus catalytically cleaned in the normal course of operation and there is a heat recovery.
  • the heat energy dissipated from the exhaust gas heat exchanger 1 by means of the cooling medium 21 or 22 is used to preheat the combustion air and / or to operate a separate expansion engine and / or to heat the vehicle 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un procédé et un dispositif correspondant permettant de faire fonctionner un système échangeur de chaleur dans un véhicule à moteur. Dans la phase de mise en température du moteur à combustion interne, et lors du dépassement d'une température maximale autorisée de l'agent de refroidissement, le fluide de refroidissement se trouvant dans l'échangeur de chaleur pour gaz d'échappement est déplacée par un courant gazeux de l'échangeur de chaleur pour gaz d'échappement, et le gaz séjourne dans la phase de mise en température jusqu'à atteindre la température de mise en marche du catalyseur, et lors d'un dépassement de la température maximale autorisée de l'agent de refroidissement jusqu'à atteindre une température de l'agent de refroidissement autorisée dans l'échangeur de chaleur pour gaz d'échappement. Une fois atteinte la température de mise en marche du catalyseur, ou après être en dessous de la température maximale autorisée de l'agent de refroidissement, l'échangeur de chaleur pour gaz d'échappement est purgé et, dans cet échangeur parvient un fluide de refroidissement qui, par échange thermique indirect, est chauffé par les gaz d'échappement du moteur à combustion interne.
PCT/DE2009/000043 2008-01-19 2009-01-15 Procédé et dispositif permettant de faire fonctionner un système échangeur de chaleur dans un véhicule à moteur WO2009089827A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09702501A EP2229512A1 (fr) 2008-01-19 2009-01-15 Procédé et dispositif permettant de faire fonctionner un système échangeur de chaleur dans un véhicule à moteur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008005275.2 2008-01-19
DE102008005275A DE102008005275B4 (de) 2008-01-19 2008-01-19 Verfahren und Vorrichtung zum Betreiben eines Wärmetauschersystems für ein Kraftfahrzeug

Publications (1)

Publication Number Publication Date
WO2009089827A1 true WO2009089827A1 (fr) 2009-07-23

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PCT/DE2009/000043 WO2009089827A1 (fr) 2008-01-19 2009-01-15 Procédé et dispositif permettant de faire fonctionner un système échangeur de chaleur dans un véhicule à moteur

Country Status (3)

Country Link
EP (1) EP2229512A1 (fr)
DE (1) DE102008005275B4 (fr)
WO (1) WO2009089827A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011017764A1 (de) 2011-04-29 2012-10-31 Robert Bosch Gmbh Wärmespeichersystem für ein Kraftfahrzeug

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2339005A1 (de) * 1972-10-27 1974-05-09 Modine Mfg Co Katalytischer waermetauscher
JPH0267415A (ja) * 1988-08-31 1990-03-07 Mitsubishi Motors Corp 排気ガス温度制御方法
DE19951583A1 (de) * 1999-10-27 2001-05-23 Daimler Chrysler Ag Abgaskatalysatoreinheit, Abgasreinigungsanlage und Betriebsverfahren hierfür
DE10111787A1 (de) * 2000-03-13 2001-09-27 Gen Motors Corp Integrierte Wärme- und Abgasmanagementeinheit
EP1331113A1 (fr) * 2002-01-26 2003-07-30 J. Eberspächer GmbH & Co. KG Système de réfrigération et/ou de chauffage d'un espace, avec cycle de réfrigération par adsorption
JP2008190439A (ja) * 2007-02-06 2008-08-21 Toyota Motor Corp 排気熱回収装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2401204A1 (de) * 1974-01-11 1975-07-17 Marquardt Peter Katalytischer abgasreaktor fuer verbrennungsmotoren
DE19537801A1 (de) 1994-10-21 1996-04-25 Volkswagen Ag Kraftfahrzeug mit Abgaswärmetauscher
DE19960929A1 (de) * 1999-12-17 2001-06-28 Bosch Gmbh Robert Abschaltbarer Wärmetauscher
DE102004051891A1 (de) * 2004-10-26 2006-05-04 Daimlerchrysler Ag Brennkraftmaschine mit einem Abgasreinigungssystem und Verfahren zum Betrieb eines Abgasreinigungssystems

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2339005A1 (de) * 1972-10-27 1974-05-09 Modine Mfg Co Katalytischer waermetauscher
JPH0267415A (ja) * 1988-08-31 1990-03-07 Mitsubishi Motors Corp 排気ガス温度制御方法
DE19951583A1 (de) * 1999-10-27 2001-05-23 Daimler Chrysler Ag Abgaskatalysatoreinheit, Abgasreinigungsanlage und Betriebsverfahren hierfür
DE10111787A1 (de) * 2000-03-13 2001-09-27 Gen Motors Corp Integrierte Wärme- und Abgasmanagementeinheit
EP1331113A1 (fr) * 2002-01-26 2003-07-30 J. Eberspächer GmbH & Co. KG Système de réfrigération et/ou de chauffage d'un espace, avec cycle de réfrigération par adsorption
JP2008190439A (ja) * 2007-02-06 2008-08-21 Toyota Motor Corp 排気熱回収装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011017764A1 (de) 2011-04-29 2012-10-31 Robert Bosch Gmbh Wärmespeichersystem für ein Kraftfahrzeug

Also Published As

Publication number Publication date
DE102008005275B4 (de) 2012-04-26
EP2229512A1 (fr) 2010-09-22
DE102008005275A1 (de) 2009-07-23

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