DE112005001389B4 - Cooling circuits for an internal combustion engine with liquid-cooled exhaust gas recirculation - Google Patents

Cooling circuits for an internal combustion engine with liquid-cooled exhaust gas recirculation Download PDF

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Publication number
DE112005001389B4
DE112005001389B4 DE112005001389.8T DE112005001389T DE112005001389B4 DE 112005001389 B4 DE112005001389 B4 DE 112005001389B4 DE 112005001389 T DE112005001389 T DE 112005001389T DE 112005001389 B4 DE112005001389 B4 DE 112005001389B4
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Germany
Prior art keywords
exhaust gas
cooling circuit
internal combustion
gas recirculation
combustion engine
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Expired - Fee Related
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DE112005001389.8T
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German (de)
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DE112005001389A5 (en
Inventor
Ludwig Bürgler
Klemens Neunteufl
Michael Weissbäck
Richard Schneider
Peter Ebner
Stefan Strobl
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AVL List GmbH
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AVL List GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/14—Supplying electric power to auxiliary equipment of vehicles to electric lighting circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/46—Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48—Liquid supply therefor
    • B60S1/487—Liquid supply therefor the liquid being heated
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20927—Liquid coolant without phase change
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/36—Temperature of vehicle components or parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2250/00—Driver interactions
    • B60L2250/10—Driver interactions by alarm
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P2005/105—Using two or more pumps
    • 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
    • F01P2050/00—Applications
    • F01P2050/24—Hybrid vehicles
    • 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
    • F01P2050/00—Applications
    • F01P2050/30—Circuit boards
    • 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
    • F01P2060/16—Outlet manifold
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • 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
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • 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
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

Brennkraftmaschine (101) mit Flüssigkeitskühlung, mit einem zumindest eine erste Kühlmittelpumpe (110) und zumindest einen Fahrzeugkühler (111) aufweisenden Motorkühlsystem (108), mit einem zumindest einen Abgasrückführkühler (107) enthaltenden Abgasrückführsystem (104), wobei der Abgasrückführkühler (107) über einen eine zweite Kühlmittelpumpe (115) enthaltenden Nebenkühlkreislauf (114) in das Motorkühlsystem (108) eingebunden ist, welcher Nebenkühlkreislauf (114) zwischen dem Fahrzeugkühler (111) und der Brennkraftmaschine vom Hauptkühlkreislauf (109) des Motorkühlsystems (108) ausgeht, dadurch gekennzeichnet, dass der Nebenkühlkreislauf (114) unmittelbar stromabwärts des Fahrzeugkühlers (111) vom Hauptkühlkreislauf (109) abzweigt.Internal combustion engine (101) with liquid cooling, with an at least one first coolant pump (110) and at least one vehicle radiator (111) having engine cooling system (108) with at least one exhaust gas recirculation (107) containing exhaust gas recirculation system (104), wherein the exhaust gas recirculation cooler (107) via a secondary cooling circuit (114) containing a second coolant pump (115) is integrated into the engine cooling system (108), which secondary cooling circuit (114) between the vehicle radiator (111) and the internal combustion engine proceeds from the main cooling circuit (109) of the engine cooling system (108), characterized in that the auxiliary cooling circuit (114) branches off from the main cooling circuit (109) immediately downstream of the vehicle radiator (111).

Description

Die Erfindung betrifft eine Brennkraftmaschine mit Flüssigkeitskühlung, mit einem zumindest eine erste Kühlmittelpumpe und zumindest einen Fahrzeugkühler aufweisenden Motorkühlsystem, mit einem zumindest einen Abgasrückführkühler enthaltenden Abgasrückführsystem, wobei der Abgasrückführkühler über einen eine zweite Kühlmittelpumpe enthaltenden Nebenkühlkreislauf in das Motorkühlsystem eingebunden ist, welcher Nebenkühlkreislauf zwischen dem Fahrzeugkühler und der Brennkraftmaschine vom Hauptkühlkreislauf des Motorkühlsystems ausgeht.The invention relates to an internal combustion engine with liquid cooling, with an at least one first coolant pump and at least one vehicle radiator having engine cooling system, with an exhaust gas recirculation system containing at least one exhaust gas recirculation system, wherein the exhaust gas recirculation cooler is integrated via a second coolant pump containing auxiliary cooling circuit in the engine cooling system, which auxiliary cooling circuit between the vehicle radiator and the internal combustion engine from the main cooling circuit of the engine cooling system emanates.

Aus der DE 101 46 313 A1 ist ein Kühlkreislauf einer flüssigkeitsgekühlten Brennkraftmaschine der eingangs genannten Art eines Fahrzeuges bekannt, welcher einen durch die Brennkraftmaschine führenden Hauptkühlkreislauf, eine Kühlmittelpumpe, ein Mischventil, einen Kühler und mindestens einen Nebenkreislauf mit einer Abgasrückführkühleinrichtung aufweist. Nachteilig für die Kühlung des rückgeführten Abgases ist, dass das Kühlmedium des Nebenkreislaufes aus dem Hauptkühlkreislauf aus einem Bereich entnommen wird, in welchem relativ hohe Kühlmitteltemperaturen herrschen, welche aus dem Mischungsverhältnis des Kühlmittels aus dem Fahrzeugkühler und einer den Fahrzeugkühler umgehenden Kurzschlussleitung resultiert.From the DE 101 46 313 A1 a cooling circuit of a liquid-cooled internal combustion engine of the aforementioned type of vehicle is known, which has a leading through the engine main cooling circuit, a coolant pump, a mixing valve, a cooler and at least one secondary circuit with an exhaust gas recirculation cooling device. A disadvantage of the cooling of the recirculated exhaust gas is that the cooling medium of the secondary circuit is removed from the main cooling circuit from an area in which relatively high coolant temperatures prevail, which results from the mixing ratio of the coolant from the vehicle radiator and a short circuit line bypassing the vehicle radiator.

Ein weiteres Kühlsystem für eine Brennkraftmaschine mit einem Motorkühlkreislauf mit einem Motorkühler und einer Abgasrückführleitung, in welcher eine Kühleinrichtung angeordnet ist, ist aus der DE 196 33 190 A1 bekannt. Die Kühleinrichtung ist in den Motorkühlkreislauf integriert und über eine Abzweigleitung und eine Rückleitung mit Leitungen des Motorkühlkreislaufes verbunden.Another cooling system for an internal combustion engine with an engine cooling circuit with an engine radiator and an exhaust gas recirculation line, in which a cooling device is arranged, is from the DE 196 33 190 A1 known. The cooling device is integrated in the engine cooling circuit and connected via a branch line and a return line with lines of the engine cooling circuit.

Weitere Kühlsysteme für Brennkraftmaschinen mit einem Motorkühlkreislauf und einer Kühleinrichtung für rückgeführtes Abgas sind aus den Veröffentlichungen DE 102 24 063 A1 , FR 02869649_A1 , JP 2002-227646 A und US 6,273,033 B1 bekannt. Auch bei diesen bekannten Kühlsystemen treten die erläuterten Nachteile auf.Further cooling systems for internal combustion engines with an engine cooling circuit and a recirculated exhaust gas cooling device are known from the publications DE 102 24 063 A1 . FR 02869649_A1 . JP 2002-227646 A and US 6,273,033 B1 known. Also in these known cooling systems, the described disadvantages occur.

Aufgabe der Erfindung ist es, die Kühlleistung für den Abgasrückführkühler zu erhöhen.The object of the invention is to increase the cooling capacity for the exhaust gas recirculation cooler.

Erfindungsgemäß wird dies dadurch erreicht, dass der Nebenkühlkreislauf unmittelbar stromabwärts des Fahrzeugkühlers vom Hauptkühlkreislauf abzweigt. Im warmen Betriebszustand sind im Bereich des Austrittes aus dem Fahrzeugkühler Kühlmitteltemperaturen bis unter 60° zu erwarten, was eine intensivere Kühlleistung für den Abgasrückführkühler ermöglicht. Das Abgas kann somit bei wesentlich niedrigeren Temperaturen rückgeführt werden. Alternativ dazu kann auch ein kleinerer Abgasrückführkühler bei gleicher Kühlleistung eingesetzt werden.According to the invention this is achieved in that the secondary cooling circuit branches off immediately downstream of the vehicle radiator from the main cooling circuit. In the warm operating condition, coolant temperatures below 60 ° C are to be expected in the region of the outlet from the vehicle radiator, which permits a more intensive cooling power for the exhaust gas recirculation cooler. The exhaust gas can thus be recycled at much lower temperatures. Alternatively, a smaller exhaust gas recirculation cooler with the same cooling capacity can be used.

Bei einem Kühlsystem, welches eine Kurzschlussleitung zur Umgehung des Fahrzeugkühlers aufweist, ist es besonders vorteilhaft, wenn der Nebenkühlkreislauf zwischen dem Fahrzeugkühler und der Einmündung der Kurzschlussleitung vom Hauptkühlkreislauf abzweigt. Vorzugsweise ist dabei vorgesehen, dass der Nebenkühlkreislauf stromaufwärts der Abzweigung der Kurzschlussleitung in den Hauptkühlkreislauf einmündet.In a cooling system which has a short-circuit line for bypassing the vehicle radiator, it is particularly advantageous if the auxiliary cooling circuit between the vehicle radiator and the junction of the short-circuit line branches off from the main cooling circuit. Preferably, it is provided that the auxiliary cooling circuit opens upstream of the branch of the short-circuit line in the main cooling circuit.

Um eine optimale Kühlung des rückgeführten Abgases zu erreichen, ist vorgesehen, dass die zweite Kühlmittelpumpe als Funktion zumindest eines Motorsteuerungsparameters und/oder über zumindest einen Sensor steuerbar ist.In order to achieve optimum cooling of the recirculated exhaust gas, it is provided that the second coolant pump can be controlled as a function of at least one engine control parameter and / or via at least one sensor.

Die zweite Kühlmittelpumpe kann stromaufwärts des Abgasrückführkühlers im Nebenkühlkreislauf angeordnet sein.The second coolant pump may be arranged upstream of the exhaust gas recirculation cooler in the secondary cooling circuit.

Der Abgasrückführkühler kann abgasseitig durch eine Bypassleitung umgehbar sein, wobei vorzugsweise die Umgehung mittels eines Schaltorgans, beispielsweise einer Schaltklappe, gesteuert werden kann.The exhaust gas recirculation cooler can be bypassed on the exhaust side by a bypass line, wherein preferably the bypass by means of a switching element, such as a switching flap, can be controlled.

Die Erfindung wird im Folgenden anhand der Figuren näher erläutert. Es zeigen:The invention will be explained in more detail below with reference to FIGS. Show it:

1 die erfindungsgemäße Brennkraftmaschine in einer ersten Ausführungsvariante; und 1 the internal combustion engine according to the invention in a first embodiment; and

2 die erfindungsgemäße Brennkraftmaschine in einer zweiten Ausführungsvariante. 2 the internal combustion engine according to the invention in a second embodiment.

Eine Brennkraftmaschine 101 weist ein Einlasssystem 102 und ein Auslasssystem 103 auf. Zur Rückführung von Abgas aus dem Auslasssystem 103 zum Einlasssystem 102 ist ein Abgasrückführsystem 104 mit einer Abgasrückführleitung 105 vorgesehen, in welcher ein Abgasrückführventil 106 und ein Abgasrückführkühler 107 angeordnet sind.An internal combustion engine 101 has an inlet system 102 and an exhaust system 103 on. For recirculation of exhaust gas from the exhaust system 103 to the intake system 102 is an exhaust gas recirculation system 104 with an exhaust gas recirculation line 105 provided in which an exhaust gas recirculation valve 106 and an exhaust gas recirculation cooler 107 are arranged.

Zur Kühlung der Brennkraftmaschine ist ein Motorkühlsystem 108 mit einem Hauptkühlkreislauf 109 vorgesehen. Das Motorkühlsystem weist eine im Hauptkühlkreislauf 109 angeordnete erste Kühlmittelpumpe 110, sowie einen Fahrzeugkühler 111 auf, dessen Eintritt mit 112 und dessen Austritt mit 113 bezeichnet ist. Der Abgasrückführkühler 107 ist über einen Nebenkühlkreislauf 114 mit dem Hauptkühlkreislauf 109 verbunden, wobei im Nebenkühlkreislauf 114 eine zweite Kühlmittelpumpe 115 stromaufwärts des Abgasrückführkühlers 107 angeordnet ist.For cooling the internal combustion engine is an engine cooling system 108 with a main cooling circuit 109 intended. The engine cooling system has one in the main cooling circuit 109 arranged first coolant pump 110 , as well as a vehicle radiator 111 on, whose entry with 112 and its exit with 113 is designated. The exhaust gas recirculation cooler 107 is via a secondary cooling circuit 114 with the main cooling circuit 109 connected, wherein in the secondary cooling circuit 114 a second coolant pump 115 upstream of the exhaust gas recirculation cooler 107 is arranged.

Die Abzweigung 116 des Nebenkühlkreislaufes 114 ist möglichst nahe beim Austritt 113 aus dem Fahrzeugkühler 111 angeordnet. Dadurch kann die Kühlmitteleintrittstemperatur T1 in den Nebenkühlkreislauf 114 möglichst niedrig gehalten werden.The turnoff 116 of the secondary cooling circuit 114 is as close to the exit 113 from the vehicle radiator 111 arranged. This allows the coolant inlet temperature T 1 in the secondary cooling circuit 114 be kept as low as possible.

2 zeigt eine Ausführung, bei der der Fahrzeugkühler 111 über eine Kurzschlussleitung 117 umgehbar ist, wobei die Kurzschlussleitung 117 über ein Mischventil 118 stromaufwärts des Eintrittes 112 in den Fahrzeugkühler 111 vom Hauptkühlkreislauf 109 abzweigt und stromabwärts des Austrittes 113 wieder in diesen einmündet. Die Einmündung der Kurzschlussleitung 117 ist mit Bezugszeichen 118 bezeichnet. Um die Eintrittstemperatur T1 in den Nebenkühlkreislauf 114 möglichst gering zu halten, ist es wesentlich, dass die Abzweigung 116 stromaufwärts der Mündung 118 der Kurzschlussleitung 117, also zwischen der Mündung 118 und dem Austritt 113 aus dem Fahrzeugkühler 111, angeordnet ist. Der Nebenkühlkreislauf 114 kann entweder stromaufwärts, oder stromabwärts des Mischventils 118 in den Hauptkühlkreislauf 108 einmünden. Die letztgenannte Variante ist mit strichlierten Linien in 3 angedeutet. 2 shows an embodiment in which the vehicle radiator 111 via a short circuit line 117 is bypassable, with the short-circuit line 117 via a mixing valve 118 upstream of the entrance 112 in the vehicle radiator 111 from the main cooling circuit 109 branches off and downstream of the outlet 113 again in this opens. The junction of the short circuit line 117 is with reference numerals 118 designated. To the inlet temperature T 1 in the secondary cooling circuit 114 To keep it as low as possible, it is essential that the diversion 116 upstream of the estuary 118 the short circuit line 117 that is, between the mouth 118 and the exit 113 from the vehicle radiator 111 , is arranged. The secondary cooling circuit 114 can be either upstream, or downstream of the mixing valve 118 in the main cooling circuit 108 open out. The latter variant is with dashed lines in 3 indicated.

Das Ein- und Ausschalten der elektrischen zweiten Kühlmittelpumpe 115 kann als Funktion von Motorsteuerungsparametern und/oder durch Sensoren erfolgen. Zur Minimierung der aufgenommenen Leistung und somit des Verbrauches kann die zweite Kühlmittelpumpe als Funktion des Motorbetriebszustandes, (z. B. temperaturabhängig) drehzahlgesteuert sein.The switching on and off of the electric second coolant pump 115 can be done as a function of engine control parameters and / or by sensors. In order to minimize the power consumed and thus the consumption, the second coolant pump may be speed-controlled as a function of the engine operating state (eg temperature-dependent).

Der Abgasrückführkühler 107 kann mittels einer Bypassleitung 120 abgasseitig umgangen werden, wobei im Bereich der Abzweigung der Bypassleitung 120 von der Abgasrückführleitung 105 ein Schaltorgan 121, beispielsweise eine Schaltklappe, angeordnet ist. Über das Schaltorgan 121 wird der Abgasstrom wahlweise durch den Abgasrückführkühler 107 oder durch die Bypassleitung 120 geleitet.The exhaust gas recirculation cooler 107 can by means of a bypass line 120 be bypassed on the exhaust side, wherein in the region of the diversion of the bypass line 120 from the exhaust gas recirculation line 105 a switching element 121 , For example, a switching flap is arranged. About the switching element 121 the exhaust gas flow is optionally through the exhaust gas recirculation cooler 107 or through the bypass line 120 directed.

Claims (7)

Brennkraftmaschine (101) mit Flüssigkeitskühlung, mit einem zumindest eine erste Kühlmittelpumpe (110) und zumindest einen Fahrzeugkühler (111) aufweisenden Motorkühlsystem (108), mit einem zumindest einen Abgasrückführkühler (107) enthaltenden Abgasrückführsystem (104), wobei der Abgasrückführkühler (107) über einen eine zweite Kühlmittelpumpe (115) enthaltenden Nebenkühlkreislauf (114) in das Motorkühlsystem (108) eingebunden ist, welcher Nebenkühlkreislauf (114) zwischen dem Fahrzeugkühler (111) und der Brennkraftmaschine vom Hauptkühlkreislauf (109) des Motorkühlsystems (108) ausgeht, dadurch gekennzeichnet, dass der Nebenkühlkreislauf (114) unmittelbar stromabwärts des Fahrzeugkühlers (111) vom Hauptkühlkreislauf (109) abzweigt.Internal combustion engine ( 101 ) with liquid cooling, with at least one first coolant pump ( 110 ) and at least one vehicle radiator ( 111 ) engine cooling system ( 108 ), with at least one exhaust gas recirculation cooler ( 107 ) exhaust gas recirculation system ( 104 ), wherein the exhaust gas recirculation cooler ( 107 ) via a second coolant pump ( 115 ) containing secondary cooling circuit ( 114 ) into the engine cooling system ( 108 ), which secondary cooling circuit ( 114 ) between the vehicle radiator ( 111 ) and the internal combustion engine from the main cooling circuit ( 109 ) of the engine cooling system ( 108 ), characterized in that the secondary cooling circuit ( 114 ) immediately downstream of the vehicle radiator ( 111 ) from the main cooling circuit ( 109 ) branches off. Brennkraftmaschine (101) nach Anspruch 1, wobei der Fahrzeugkühler über eine Kurzschlussleitung (117) umgehbar ist, welche stromabwärts des Fahrzeugkühlers (111) in den Hauptkühlkreislauf (109) einmündet, dadurch gekennzeichnet, dass der Nebenkühlkreislauf (114) zwischen dem Fahrzeugkühler (111) und der Einmündung der Kurzschlussleitung (117) vom Hauptkühlkreislauf (109) abzweigt.Internal combustion engine ( 101 ) according to claim 1, wherein the vehicle radiator via a short-circuit line ( 117 ), which downstream of the vehicle radiator ( 111 ) into the main cooling circuit ( 109 ), characterized in that the secondary cooling circuit ( 114 ) between the vehicle radiator ( 111 ) and the junction of the short-circuit line ( 117 ) from the main cooling circuit ( 109 ) branches off. Brennkraftmaschine (101) nach Anspruch 2, dadurch gekennzeichnet, dass der Nebenkühlkreislauf (114) stromaufwärts der Abzweigung der Kurzschlussleitung (117) in den Hauptkühlkreislauf (109) einmündet.Internal combustion engine ( 101 ) according to claim 2, characterized in that the secondary cooling circuit ( 114 ) upstream of the branch of the short-circuit line ( 117 ) into the main cooling circuit ( 109 ). Brennkraftmaschine (101) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die zweite Kühlmittelpumpe (115) im Nebenkühlkreislauf (114) stromaufwärts des Abgasrückführkühlers (107) angeordnet ist.Internal combustion engine ( 101 ) according to one of claims 1 to 3, characterized in that the second coolant pump ( 115 ) in the secondary cooling circuit ( 114 ) upstream of the exhaust gas recirculation cooler ( 107 ) is arranged. Brennkraftmaschine (101) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die zweite Kühlmittelpumpe (115) als Funktion zumindest eines Motorsteuerungsparameters und/oder über zumindest einen Sensor steuerbar ist.Internal combustion engine ( 101 ) according to one of claims 1 to 4, characterized in that the second coolant pump ( 115 ) is controllable as a function of at least one engine control parameter and / or via at least one sensor. Brennkraftmaschine (101) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Abgasrückführkühler (107) abgasseitig durch eine Bypassleitung (120) umgehbar ist.Internal combustion engine ( 101 ) according to one of claims 1 to 5, characterized in that the exhaust gas recirculation cooler ( 107 ) on the exhaust side through a bypass line ( 120 ) is bypassable. Brennkraftmaschine (101) nach Anspruch 6, dadurch gekennzeichnet, dass die Umgehung durch ein Schaltorgan (121) steuerbar ist.Internal combustion engine ( 101 ) according to claim 6, characterized in that the bypass by a switching member ( 121 ) is controllable.
DE112005001389.8T 2004-06-17 2005-06-16 Cooling circuits for an internal combustion engine with liquid-cooled exhaust gas recirculation Expired - Fee Related DE112005001389B4 (en)

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