EP2596224A1 - Système d'entraînement pour un véhicule - Google Patents

Système d'entraînement pour un véhicule

Info

Publication number
EP2596224A1
EP2596224A1 EP11729262.3A EP11729262A EP2596224A1 EP 2596224 A1 EP2596224 A1 EP 2596224A1 EP 11729262 A EP11729262 A EP 11729262A EP 2596224 A1 EP2596224 A1 EP 2596224A1
Authority
EP
European Patent Office
Prior art keywords
working medium
drive system
thermal energy
exhaust gas
energy
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Withdrawn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
EP11729262.3A
Other languages
German (de)
English (en)
Inventor
Jürgen Ringler
Marco Seifert
Wolfgang Strobl
Raymond Freymann
Andreas Eder
Matthias Linde
Johannes Liebl
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP2596224A1 publication Critical patent/EP2596224A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B65/00—Adaptations of engines for special uses not provided for in groups F02B61/00 or F02B63/00; Combinations of engines with other devices, e.g. with non-driven apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/065—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02—Profiting from waste heat of exhaust gases
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
    • H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
    • H10N10/13—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the heat-exchanging means at the junction
    • 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

Definitions

  • the present invention relates to a drive system for a vehicle, having a mechanical and thermal energy-releasing internal combustion engine and a device for converting the thermal energy, according to the preamble of claim 1.
  • thermoelectric generator with which electrical energy can be obtained from the thermal energy present in the exhaust gas, for example according to the Seebeck effect, which is then no longer generated regeneratively with additional consumption of fuel got to.
  • EP 1573194 B1 discloses a heat engine which has a low-temperature circuit and a high-temperature circuit, each followed by switched relaxation device with the aid of the waste heat of the internal combustion engine generated mechanical work.
  • the object of the present invention is to refine the known drive system from the point of view of improving its overall efficiency.
  • the invention provides a drive system for a vehicle, comprising a mechanical and thermal energy releasing internal combustion engine and a device for converting the thermal energy, wherein the device for direct conversion of the thermal energy into electrical energy and for transmitting thermal energy to a for applying a Expansion device provided working medium is formed.
  • the device provided for utilizing the thermal energy dissipated by the internal combustion engine via the exhaust gas flow is designed both for directly converting the thermal energy into electrical energy and for transmitting thermal energy to a working medium, with which in turn Expander can be acted upon, so that with the device, the thermal energy can be converted into both electrical energy and into mechanical energy.
  • the heat present in the exhaust gas flow of the internal combustion engine can be advantageously used to generate both electric current which, for example, supports the on-board voltage network of the vehicle, as well
  • the overall efficiency of the drive system increases and it is additionally achieved the advantage of functional integration, since a vaporizer required for evaporation of the working medium is thus used simultaneously as a cooler for a component by means of which the thermal energy can be converted into electrical energy.
  • the component for converting the thermal energy into electrical energy may be a thermoelectric generator having surfaces heated by means of the thermal energy and surfaces cooled by means of the working medium such that the working medium assumes a vaporous state as a result of the application of heat.
  • the vaporous working medium after passage through the device provided according to the invention can then act on an expansion device, wherein the expansion device can be, for example, a piston machine with which a mechanically driven component is acted on the vehicle.
  • the device has a condensation device for the condensation of vaporous working medium after it has passed through an expansion device.
  • the then liquid working fluid is fed back to the device by means of a working medium in the circulation leading pump device, which then again using the residual energy available in the exhaust gas in the exhaust gas. stood convicted.
  • the device may be a heat exchanger which has first surfaces heated by the exhaust gas of the engine and second surfaces cooled by the working medium with thermoelectric pair of legs arranged therebetween and at least one inlet - for working fluid in the liquid state - and outlet - for Working medium in the vapor state - has and each having at least one inlet and outlet for the exhaust gas of the internal combustion engine, which enters the inlet, where the first surface is acted upon by the hot side of the pair of legs and discharged at a lower temperature at the outlet again.
  • the working medium is used for cooling the second surface and takes there thermal energy from the hot exhaust gas is largely isothermal and exits as a vapor phase from the device to be supplied to the above-mentioned expansion device.
  • the heat present in the exhaust gas for generating electrical and mechanical energy can be used combinatorially, whereby a total of the overall efficiency of the drive system according to the invention compared to known drive systems is significantly increased.
  • the invention also provides a method for utilizing the thermal energy contained in the exhaust gas of an internal combustion engine for conversion into electrical and mechanical energy by means of a thermoelectric generator and a steam Rankine process, wherein the heat absorption required for the evaporation of the working medium conducted in the steam cycle process is largely isothermal takes place and the heat is removed from the cold side of the heated exhaust gas thermoelectric generator. The transmitted from the exhaust of the engine to the working fluid
  • thermoelectric leg pair Heat passes through a large temperature gradient in the largely isothermal heat absorption by the working medium. Due to the temperature gradient during heat transfer to the working medium, a loss of exergy occurs. By attaching thermoelectric material on the hot and cold side of the heat exchanger, this exergy loss can be partially prevented, in such a way that caused by the largely isothermal heat absorption temperature gradient between the exhaust gas and working fluid - ie between the hot and cold side of the heat exchanger - to drive the thermoelectric leg pair is used.
  • Figure 1 is a perspective view of an embodiment of a device provided in the drive system according to the invention for the conversion of thermal energy into electrical energy and the heat application of an Arbettsmediums.
  • Fig. 2 is a schematic representation of a drive system according to the present invention.
  • FIG. 3 shows a diagram with the transferred heat quantity on the x-axis to explain the mode of operation of the drive system according to the invention.
  • Fig. 1 of the drawing shows a device 1 which shows an essential part of the drive system 2 according to the invention, which is shown in a schematic representation in Fig. 2 of the drawing.
  • a heat exchanger 3 having an inlet 4 for the hot exhaust gas from the position shown in Fig. 2 of the drawings internal combustion engine 5.
  • the heat exchanger 3 has an outlet 6, not shown in greater detail in the selected perspective view, for the exhaust gas cooled in the heat exchanger 3.
  • exhaust gas mass flow 7 passes over the Inlet 4 in the heat exchanger 3 a.
  • the hot exhaust gas mass flow 7 heats first surfaces 8 arranged in the heat exchanger 3, which correspond to the hot side of the thermoelectric generator 10 formed by thermoelectric leg pairs.
  • the thermoelectric pair of legs, not shown, are arranged between the respective hot first surfaces 8 and respective cooled second surfaces 9.
  • the working medium enters the heat exchanger 3 as a liquid mass flow 12 at an inlet 12, which is not shown in more detail because of the perspective view, where it cools the respective second surfaces 9, absorbs heat from the hot exhaust gas mass flow 7 in a largely isothermal process of heat transfer. is evaporated and exits at an outlet 14 as a vaporous mass flow from the heat exchanger 3 again.
  • FIG. 2 of the drawing shows the internal combustion engine 5, from which the hot exhaust gas mass flow 7 enters the heat exchanger 3.
  • the vaporous working medium veriässt the heat exchanger 3 and is supplied via a schematically illustrated fluid line 16 of the expansion device 11, there relaxed under pressure loss and converted into symbolically represented by an arrow 17 mechanical energy.
  • This can be used, for example, to drive a mechanically actuated component of the vehicle, not shown, or be coupled into the driveline of the vehicle.
  • the working medium After leaving the expansion device 11, the working medium is supplied via a fluid line 18 to a condenser 19 and there converted into the liquid phase with the removal of heat, as shown by the arrow 26.
  • a pump device 21 Via a fluid line 20, a pump device 21 suck the liquid working fluid and perform over another fluid line 22 back to the heat exchanger 3 and in this way lead the working fluid in a circle, such as this is shown by the arrow 23.
  • Fig. 3 of the drawing shows a diagram for explaining the invention.
  • the hot exhaust gas mass flow 7 enters the heat exchanger 3 at a high temperature of, for example, 520 ° Celsius shown by the reference numeral 24, heats up the hot side of the thermoelectric generator 10 there - this can be done, for example, by coating surfaces of the heat transfer medium
  • Working medium required heat exchanger 3 are provided with thermoelekt- rischer material - and gives off on its way to the outlet 6 of the heat exchanger 3 heat.
  • the exhaust gas leaves the heat exchanger 3 with a temperature of about 200 ° C shown by the reference numeral 25. This heat is transferred largely isothermally to a working medium, the heat transfer takes place at the cooled by the working medium cold Flä-.
  • the drive system according to the invention allows the combinatorial use of residual energy present in the exhaust gas for the provision of electrical energy in the context of a thermoelectric process and for the provision of mechanical energy in the context of a steam Rankine process.
  • the drive system according to the invention thus makes it possible to use the residual energy present in the exhaust gas of the internal combustion engine for the provision of electrical energy and mechanical energy in a coupled process.
  • the predominantly isothermal heat absorption during evaporation of the working medium also serves as a very efficient cooling for the cold side of the thermoelectric generator, so that the waste heat available in the exhaust gas can be almost completely used for conversion into useful energy and the amount of with the Ab- the environment of dissipated energy can be significantly reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

La présente invention concerne un système d'entraînement (1) pour un véhicule, comprenant un moteur à combustion interne (5) qui libère de l'énergie mécanique et thermique, et un dispositif (3) permettant de transformer directement de l'énergie thermique en énergie électrique et de transmettre de l'énergie thermique à un fluide actif conçu pour alimenter un dispositif d'expansion (11).
EP11729262.3A 2010-07-23 2011-07-01 Système d'entraînement pour un véhicule Withdrawn EP2596224A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010038314A DE102010038314A1 (de) 2010-07-23 2010-07-23 Antriebssystem für ein Fahrzeug
PCT/EP2011/003268 WO2012010253A1 (fr) 2010-07-23 2011-07-01 Système d'entraînement pour un véhicule

Publications (1)

Publication Number Publication Date
EP2596224A1 true EP2596224A1 (fr) 2013-05-29

Family

ID=44627847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11729262.3A Withdrawn EP2596224A1 (fr) 2010-07-23 2011-07-01 Système d'entraînement pour un véhicule

Country Status (5)

Country Link
US (1) US20130133321A1 (fr)
EP (1) EP2596224A1 (fr)
JP (1) JP5826268B2 (fr)
DE (1) DE102010038314A1 (fr)
WO (1) WO2012010253A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013011519A1 (de) 2013-07-09 2015-01-15 Volkswagen Ag Wärmetauschvorrichtung und Antriebseinheit für ein Kraftfahrzeug
DE102014216449A1 (de) * 2014-08-19 2016-02-25 Siemens Aktiengesellschaft Thermoelektrische Vorrichtung
GB201718253D0 (en) * 2017-11-03 2017-12-20 Univ Oxford Innovation Ltd Energy recovery system, vehicle, and method of recovering energy
DE102019201685A1 (de) 2019-02-08 2020-08-13 Volkswagen Aktiengesellschaft Antriebseinheit für ein Kraftfahrzeug mit kombinierter Anordnung einer Kreisprozessvorrichtung und eines thermoelektrischen Generators

Citations (1)

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WO2004033887A2 (fr) * 2002-10-10 2004-04-22 Hunt Robert D Procede et systeme de moteur a combustion d'energie hybride

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DE3005112A1 (de) * 1980-02-12 1981-08-20 Kurt Dipl.-Ing. 6380 Bad Homburg Bojak Thermoelektrischer generator vorzugsweise fuer wasser-elektrolyse funktionell kombiniert mit waermetauscher-systemen
JPS59158303A (ja) * 1983-02-28 1984-09-07 Hitachi Ltd 循環量制御方法およびその装置
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JP3881872B2 (ja) * 2001-11-15 2007-02-14 本田技研工業株式会社 内燃機関
DE10259488A1 (de) * 2002-12-19 2004-07-01 Bayerische Motoren Werke Ag Wärmekraftmaschine
JP2005061260A (ja) * 2003-08-08 2005-03-10 Denso Corp 廃熱回収システム
US20060112693A1 (en) * 2004-11-30 2006-06-01 Sundel Timothy N Method and apparatus for power generation using waste heat
JP2006177265A (ja) * 2004-12-22 2006-07-06 Denso Corp 熱電発電装置
DE102006019282A1 (de) * 2006-04-26 2007-10-31 Bayerische Motoren Werke Ag Abgasrückführsystem für eine Brennkraftmaschine
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Also Published As

Publication number Publication date
JP5826268B2 (ja) 2015-12-02
JP2013535608A (ja) 2013-09-12
US20130133321A1 (en) 2013-05-30
DE102010038314A1 (de) 2012-01-26
WO2012010253A1 (fr) 2012-01-26

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