EP2429847A1 - Controller, in particular for a hybrid vehicle having an electric drive and an internal combustion engine, and method for operating a hybrid vehicle - Google Patents

Controller, in particular for a hybrid vehicle having an electric drive and an internal combustion engine, and method for operating a hybrid vehicle

Info

Publication number
EP2429847A1
EP2429847A1 EP10709512A EP10709512A EP2429847A1 EP 2429847 A1 EP2429847 A1 EP 2429847A1 EP 10709512 A EP10709512 A EP 10709512A EP 10709512 A EP10709512 A EP 10709512A EP 2429847 A1 EP2429847 A1 EP 2429847A1
Authority
EP
European Patent Office
Prior art keywords
hybrid vehicle
control device
insulation fault
vehicle according
combustion engine
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Withdrawn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
EP10709512A
Other languages
German (de)
French (fr)
Inventor
Dragan Mikulec
Dieter Hanauer
Andreas Heyl
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2429847A1 publication Critical patent/EP2429847A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B60K6/42—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 the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
    • 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
    • B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
    • 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
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
    • 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
    • B60L3/04—Cutting off the power supply under fault conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • 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
    • B60L2240/423—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0644—Engine speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/083—Torque
    • 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
    • Y02T10/62—Hybrid vehicles
    • 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

Definitions

  • Control unit in particular for a hybrid vehicle with an electric drive and an internal combustion engine, and method for operating a hybrid vehicle
  • the invention relates to a control device, in particular for a hybrid vehicle with an electric drive and an internal combustion engine, and to a method for operating a hybrid vehicle.
  • safety standards such as ISO 6469-3 require monitoring of the insulation resistance during operation if the traction network is galvanically isolated from the hybrid vehicle's 14 V electrical system.
  • the safety standards ISO 6469-3 and SAE J 2344 in this case allow continued operation of the high voltage system of the vehicle and thus the electric drive under the condition that the insulation fault is signaled to the driver visually or acoustically and that when the vehicle is off Condition is a re-start only forced to take place. If a second insulation fault occurs, safety standards require that
  • High voltage system of the vehicle is immediately switched off automatically.
  • An insulation fault is determined by calculating the insulation resistance from measured voltage values and the value of the load resistance using a microcomputer and evaluating the calculated value.
  • a circuit arrangement for determining and displaying the insulation resistance of a storage battery is known. The initialization of this determination of the insulation resistance is carried out by an actuation of the ignition key of a motor vehicle and, moreover, periodically while driving the motor vehicle.
  • the determination of the insulation resistance takes place in isolated operation by measuring an open circuit voltage and a load voltage. During the measurement, a series connection of two capacitors is connected to the terminals of the accumulator battery in order to store the voltage values obtained during the measurement.
  • the common point between the two capacitors is connected to a bleeder resistor.
  • switching means are provided, via which measuring amplifiers can be connected to the battery poles for a predetermined period of time for measuring the partial voltage setting at the first capacitor and the partial voltage adjusting at the second capacitor to ground.
  • switching means are provided, via which the battery terminal with the higher partial voltage for measuring the load voltage with a load resistance can be loaded. As a result, the load voltage can be measured without load on the battery poles with a load resistance, and then with load of the selected battery pole with the load resistance after the specified setting time.
  • a vehicle with a fuel cell or battery powered power supply network is known, which is designed as an IT network.
  • the loads connected to the load circuit are electrically connected in a low-resistance manner to the vehicle body.
  • an insulation monitoring device consisting of a measuring bridge adjustment stage and a measuring signal conditioning isolating amplifier stage is connected between the load circuit and the vehicle body.
  • a control device is provided which, when minor deviations of the insulation resistance from a first threshold value occur, triggers a pre-alarm by an optical or acoustic warning signal and which triggers a main alarm when a greater deviation occurs and initiates a system shutdown. Disclosure of the invention
  • a control unit in particular for a hybrid vehicle with the features specified in claim 1, has the advantage that the availability of the hybrid vehicle is increased without having to accept losses in terms of safety. This is essentially achieved by providing the hybrid vehicle with a limp home mode that is initiated upon detection of an isolation fault. In this emergency mode, an immediate start of the internal combustion engine is initiated and a purely electric drive of the hybrid vehicle is prevented.
  • FIG. 1 shows a block diagram of a hybrid vehicle H, in which the components of the hybrid vehicle necessary for understanding the invention are illustrated.
  • FIG. 2 shows a flow chart for explaining the mode of operation of the control unit 2 shown in FIG.
  • the hybrid vehicle H shown in FIG. 1 has an insulation fault detector 1, a control unit 2, power electronics 3, an ignition switch 4, a starter 5, an internal combustion engine 6, a traction battery 7, an electric drive 8, a DC load 9 and an AC load 10.
  • the power electronics 3 contains the necessary for the operation of the hybrid vehicle converter, ie, one or more DC-DC converter, one or more pulse inverters and one or more rectifiers.
  • the insulation fault detector 1 is the control unit 2 after an actuation of the
  • Ignition switch 4 initializes and then performs a measurement of the insulation resistance of the traction battery 7. This measurement of the insulation resistance of the traction battery 7 is repeated during operation of the vehicle at predetermined time intervals. A respectively determined in the insulation fault detector 1 result signal is supplied to the control unit 2 and further processed there.
  • control unit 2 controls the power electronics 3 and the starter 4 in such a way that the hybrid vehicle H operates in normal operation.
  • This in turn provides via the power electronics 3 energy for the operation of the DC consumers 9 and the AC consumer 10, wherein the energy required by the DC loads 9 in the power electronics 3 is obtained by means of a DC-DC converter.
  • the internal combustion engine 6 is not activated.
  • control unit 2 activates the starter 5, which starts the internal combustion engine 6. This then supports the electric drive 8 in the supply of power consumers of the hybrid vehicle.
  • the traction battery 7 can be nachgela- using using derived from the internal combustion engine 6 energy.
  • all functions of the hybrid vehicle are available. These include a purely electric drive of the vehicle, a start-stop operation of the vehicle, a regenerative braking of the vehicle, in which an energy recuperation takes place, and an at least largely speed-limiting acceleration of the vehicle.
  • control unit 2 initiates a runflat mode in which the availability of the hybrid vehicle is still ensured without having to compromise the safety of the hybrid vehicle.
  • control unit 2 ensures that an immediate start of the internal combustion engine 6 is initiated in such a way that the hybrid vehicle can not be operated in purely electrical operation, that the hybrid vehicle can not be operated in start-stop mode, that the hybrid vehicle can not be operated in regenerative braking mode and that preferably also a speed limitation is activated.
  • FIG. 2 shows a flow chart for explaining the mode of operation of the control unit 2 shown in FIG. 1, which can be used in particular for a hybrid vehicle.
  • step S1 the ignition switch 4 of the hybrid vehicle is actuated.
  • control unit 2 initializes the insulation fault detector 1 in step S2, so that the latter performs a measurement of the insulation resistance of the traction battery 7 and outputs result signals obtained to the control unit 2.
  • step S3 a query is made in step S3, whether an insulation fault is present or not. If there is no insulation fault, then it goes to step S10, according to which a predetermined period of time is waited until the step S2 is jumped back to re-initialize the insulation fault detector for measuring the insulation resistance. If, on the other hand, it is determined in step S3 that there is an insulation fault, then step S4 is entered.
  • step S4 the internal combustion engine 6 is started by the starter 5 and there is an optical or acoustic signaling of the presence of an insulation fault.
  • step S5 a prohibition of purely electrical operation of the hybrid vehicle takes place.
  • step S6 a regenerative braking is inhibited, in step S7 inhibiting the start-stop operation of the hybrid vehicle and in step S8, a speed limit of the hybrid vehicle is initiated, in which, for example, the speed in all forward gears of the hybrid vehicle to a middle Speed value is limited.
  • step S9 the process is ended.
  • the steps S4 to S8 correspond to an initiation of a limp home mode which is initiated after the detection of the presence of an insulation fault.
  • the sequence of these steps S4-S8, which are carried out one after the other in a very short time, can also be reversed.
  • Step S8 is an optional step.
  • This emergency operation mode is initiated as soon as the presence of a first insulation fault is detected.
  • This strategy increases the availability of the vehicle without reducing safety.
  • the vehicle could then, if a second insulation fault occurs in purely electrical operation, remain lying when the necessary reaction time between the Detection of insulation fault and shutdown of the
  • High voltage system is not sufficient to start the internal combustion engine, or if the second insulation fault occurs on the other voltage side than the first insulation fault. In this case, the high-voltage system and the electric drive are short-circuited so that no torque can be built up.
  • the hybrid vehicle is in the mode of regenerative braking when a second insulation fault occurs, a loss of braking torque of the electric drive can lead to a brief loss of deceleration and thus to instability in driving.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention relates to a controller (2) for a hybrid vehicle having an electric drive (8) and an internal combustion engine (6) and to a method for operating such a controller, particularly for a hybrid vehicle (H). The hybrid vehicle comprises an electric drive, an internal combustion engine, a traction battery (7), a power electronics (3), a current consumer (10), a controller and an insulation fault detector (1). The controller initiates an emergency running mode when an insulation fault is detected.

Description

Beschreibung description
Titeltitle
Steuergerät, insbesondere für ein Hybridfahrzeug mit einem elektrischen Antrieb und einer Verbrennungskraftmaschine sowie Verfahren zum Betreiben eines HybridfahrzeugsControl unit, in particular for a hybrid vehicle with an electric drive and an internal combustion engine, and method for operating a hybrid vehicle
Die Erfindung betrifft ein Steuergerät insbesondere für ein Hybridfahrzeug mit einem elektrischen Antrieb und einer Verbrennungskraftmaschine sowie ein Verfahren zum Betreiben eines Hybridfahrzeugs.The invention relates to a control device, in particular for a hybrid vehicle with an electric drive and an internal combustion engine, and to a method for operating a hybrid vehicle.
Stand der TechnikState of the art
Bei Hybridfahrzeugen mit einer Betriebsspannung, die größer ist als 60 V DC bzw. 25 V AC, fordern Sicherheitsnormen wie beispielsweise ISO 6469-3 eine Überwachung des Isolationswiderstandes im Betrieb, falls das Traktionsnetz galvanisch getrennt vom 14 V-Bordnetz des Hybridfahrzeugs aufgebaut ist.For hybrid vehicles with an operating voltage greater than 60 V DC or 25 V AC, safety standards such as ISO 6469-3 require monitoring of the insulation resistance during operation if the traction network is galvanically isolated from the hybrid vehicle's 14 V electrical system.
Bei einem einzelnen Isolationsfehler besteht bei einer galvanischen Trennung noch keine Gefährdung für Personen durch elektrischen Schlag. Daher erlauben die Sicherheitsnormen ISO 6469-3 und SAE J 2344 in diesem Fall einen Weiterbetrieb des Hochspannungssystems des Fahrzeugs und damit des elektrischen Antriebes unter der Bedingung, dass der Isolationsfehler dem Fahrer visuell oder akustisch signalisiert wird und dass dann, wenn sich das Fahrzeug im ausgeschalteten Zustand befindet, ein Wiederstart nur erzwungen stattfinden darf. Tritt ein zweiter Isolationsfehler auf, dann verlangen die Sicherheitsnormen, dass dasIn the case of a single insulation fault, galvanic isolation does not endanger persons by electric shock. Therefore, the safety standards ISO 6469-3 and SAE J 2344 in this case allow continued operation of the high voltage system of the vehicle and thus the electric drive under the condition that the insulation fault is signaled to the driver visually or acoustically and that when the vehicle is off Condition is a re-start only forced to take place. If a second insulation fault occurs, safety standards require that
Hochspannungssystem des Fahrzeugs sofort automatisch ausgeschaltet wird. Die Ermittlung eines Isolationsfehlers erfolgt dadurch, dass aus gemessenen Spannungswerten und dem Wert des Belastungswiderstandes mittels eines Mikrorechners der Isolationswiderstand berechnet und der berechnete Wert ausge- wertet wird. Aus der DE 196 18 897 B4 ist eine Schaltungsanordnung zur Bestimmung und zur Anzeige des Isolationswiderstandes einer Akkumulatorenbatterie bekannt. Die Initialisierung dieser Bestimmung des Isolationswiderstandes erfolgt durch eine Betätigung des Zündschlüssels eines Kraftfahrzeugs und des Weiteren auch periodisch im Fahrbetrieb des Kraftfahrzeugs. Die Bestimmung des Isolationswiderstandes erfolgt im Inselbetrieb durch Messung einer Leerlaufspannung und einer Belastungsspannung. Während der Messung ist an die Klemmen der Akkumulatorenbatterie eine Reihenschaltung von zwei Kondensatoren geschaltet, um die bei der Messung erhaltenen Spannungswerte zu speichern. Der gemein- same Punkt zwischen den beiden Kondensatoren ist mit einem Ableitwiderstand verbunden. Des Weiteren sind Schaltmittel vorgesehen, über welche Messverstärker für eine vorbestimmte Zeitdauer zur Messung der sich an dem ersten Kondensator einstellenden Teilspannung und der sich an dem zweiten Kondensator einstellenden Teilspannung gegen Masse an die Batteriepole anschaltbar sind. Darüber hinaus sind Schaltmittel vorgesehen, über welche der Batteriepol mit der höheren Teilspannung zur Messung der Belastungsspannung mit einem Belastungswiderstand belastbar ist. Dadurch ist ohne Belastung der Batteriepole mit einem Belastungswiderstand die Leerlaufspannung und anschließend mit Belastung des ausgewählten Batteriepols mit dem Belastungswiderstand nach vor- gegebener Einstellzeit die Belastungsspannung messbar.High voltage system of the vehicle is immediately switched off automatically. An insulation fault is determined by calculating the insulation resistance from measured voltage values and the value of the load resistance using a microcomputer and evaluating the calculated value. From DE 196 18 897 B4 a circuit arrangement for determining and displaying the insulation resistance of a storage battery is known. The initialization of this determination of the insulation resistance is carried out by an actuation of the ignition key of a motor vehicle and, moreover, periodically while driving the motor vehicle. The determination of the insulation resistance takes place in isolated operation by measuring an open circuit voltage and a load voltage. During the measurement, a series connection of two capacitors is connected to the terminals of the accumulator battery in order to store the voltage values obtained during the measurement. The common point between the two capacitors is connected to a bleeder resistor. Furthermore, switching means are provided, via which measuring amplifiers can be connected to the battery poles for a predetermined period of time for measuring the partial voltage setting at the first capacitor and the partial voltage adjusting at the second capacitor to ground. In addition, switching means are provided, via which the battery terminal with the higher partial voltage for measuring the load voltage with a load resistance can be loaded. As a result, the load voltage can be measured without load on the battery poles with a load resistance, and then with load of the selected battery pole with the load resistance after the specified setting time.
Aus der DE 195 03 749 C1 ist ein Fahrzeug mit einem brennstoffzellen- oder batteriegespeisten Energieversorgungsnetz bekannt, welches als IT-Netz ausgeführt ist. Bei diesem sind die mit dem Laststromkreis verknüpften Verbraucher nieder- ohmig mit der Fahrzeugkarosserie elektrisch verbunden. Des Weiteren ist eine aus einer Messbrückenabgleichstufe und einer messsignalaufbereitenden Trennverstärkerstufe bestehende Isolationsüberwachungseinrichtung zwischen den Laststromkreis und die Fahrzeugkarosserie eingeschleift. Ferner ist ein Steuergerät vorgesehen, welches beim Auftreten von geringen Abweichungen des Iso- lationswiderstandes von einem ersten Schwellenwert die Auslösung eines Voralarms durch ein optisches oder akustisches Warnsignal vornimmt und welches beim Auftreten einer größeren Abweichung die Auslösung eines Hauptalarms vornimmt und eine Systemabschaltung initiiert. Offenbarung der ErfindungFrom DE 195 03 749 C1 discloses a vehicle with a fuel cell or battery powered power supply network is known, which is designed as an IT network. In this case, the loads connected to the load circuit are electrically connected in a low-resistance manner to the vehicle body. Furthermore, an insulation monitoring device consisting of a measuring bridge adjustment stage and a measuring signal conditioning isolating amplifier stage is connected between the load circuit and the vehicle body. Furthermore, a control device is provided which, when minor deviations of the insulation resistance from a first threshold value occur, triggers a pre-alarm by an optical or acoustic warning signal and which triggers a main alarm when a greater deviation occurs and initiates a system shutdown. Disclosure of the invention
Ein Steuergerät, insbesondere für ein Hybridfahrzeug mit den im Anspruch 1 angegebenen Merkmalen weist demgegenüber den Vorteil auf, dass die Verfügbar- keit des Hybridfahrzeugs erhöht ist, ohne dass Einbußen bezüglich der Sicherheit in Kauf genommen werden müssen. Dies wird im Wesentlichen dadurch erreicht, dass das Hybridfahrzeug mit einer Notlaufbetriebsart ausgestattet wird, die beim Erkennen eines Isolationsfehlers eingeleitet wird. In dieser Notlaufbetriebsart wird ein sofortiger Start der Verbrennungskraftmaschine in die Wege ge- leitet und es wird ein rein elektrischer Antrieb des Hybridfahrzeugs unterbunden.A control unit, in particular for a hybrid vehicle with the features specified in claim 1, has the advantage that the availability of the hybrid vehicle is increased without having to accept losses in terms of safety. This is essentially achieved by providing the hybrid vehicle with a limp home mode that is initiated upon detection of an isolation fault. In this emergency mode, an immediate start of the internal combustion engine is initiated and a purely electric drive of the hybrid vehicle is prevented.
Vorzugsweise erfolgt des Weiteren auch ein Unterbinden eines Start-Stopp- Betriebes des Hybridfahrzeugs und ein Unterbinden eines regenerativen Bremsen des Hybridfahrzeugs. Dies hat den Vorteil, dass beispielsweise nach einem Ampelstopp eine Weiterfahrt sicher gewährleistet ist und dass bei einem Ausfall der Batterie keine kritischen Fahrsituationen auftreten können.Further, it is also preferable to inhibit start-stop operation of the hybrid vehicle and inhibit regenerative braking of the hybrid vehicle. This has the advantage that, for example, after a stop of traffic lights a continuation of travel is safely ensured and that in case of failure of the battery no critical driving situations can occur.
Gemäß einer vorteilhaften Weiterbildung der Erfindung erfolgt auch eine Drehzahlbegrenzung des Hybridantriebs, um dem Fahrer das aufgetretene Problem zu signalisieren und ihm eine Motivation zu schaffen, zwecks einer Reparatur eine Werkstatt aufzusuchen.According to an advantageous development of the invention, there is also a speed limitation of the hybrid drive in order to signal the driver of the problem that has occurred and to provide him with a motivation to visit a workshop for the purpose of repair.
Weitere vorteilhafte Eigenschaften der Erfindung ergeben sich aus deren beispielhafter Erläuterung anhand der Zeichnung.Further advantageous features of the invention will become apparent from the exemplification thereof with reference to the drawing.
Die Figur 1 zeigt eine Blockdarstellung eines Hybridfahrzeugs H, in welcher die zum Verständnis der Erfindung notwendigen Komponenten des Hybridfahrzeugs dargestellt sind. Die Figur 2 zeigt ein Flussdiagramm zur Erläuterung der Arbeitsweise des in der Figur 1 gezeigten Steuergerätes 2.FIG. 1 shows a block diagram of a hybrid vehicle H, in which the components of the hybrid vehicle necessary for understanding the invention are illustrated. FIG. 2 shows a flow chart for explaining the mode of operation of the control unit 2 shown in FIG.
Das in der Figur 1 dargestellte Hybridfahrzeug H weist einen Isolationsfehlerdetektor 1 , ein Steuergerät 2, eine Leistungselektronik 3, einen Zündschalter 4, einen Starter 5, eine Verbrennungskraftmaschine 6, eine Traktionsbatterie 7, einen elektrischen Antrieb 8, Gleichstromverbraucher 9 und Wechselstromverbraucher 10 auf. Die Leistungselektronik 3 enthält die zum Betrieb des Hybridfahrzeugs notwendigen Wandler, d. h. einen oder mehrere Gleichspannungswandler, einen oder mehrere Pulswechselrichter und einen oder mehrere Gleichrichter.The hybrid vehicle H shown in FIG. 1 has an insulation fault detector 1, a control unit 2, power electronics 3, an ignition switch 4, a starter 5, an internal combustion engine 6, a traction battery 7, an electric drive 8, a DC load 9 and an AC load 10. The power electronics 3 contains the necessary for the operation of the hybrid vehicle converter, ie, one or more DC-DC converter, one or more pulse inverters and one or more rectifiers.
Der Isolationsfehlerdetektor 1 wird vom Steuergerät 2 nach einer Betätigung desThe insulation fault detector 1 is the control unit 2 after an actuation of the
Zündschalters 4 initialisiert und führt daraufhin eine Messung des Isolationswiderstandes der Traktionsbatterie 7 durch. Diese Messung des Isolationswiderstandes der Traktionsbatterie 7 wird während des Betriebes des Fahrzeugs in vorgegebenen Zeitintervallen wiederholt. Ein im Isolationsfehlerdetektor 1 jeweils ermitteltes Ergebnissignal wird dem Steuergerät 2 zugeführt und dort weiterverarbeitet.Ignition switch 4 initializes and then performs a measurement of the insulation resistance of the traction battery 7. This measurement of the insulation resistance of the traction battery 7 is repeated during operation of the vehicle at predetermined time intervals. A respectively determined in the insulation fault detector 1 result signal is supplied to the control unit 2 and further processed there.
Zeigt das vom Isolationsfehlerdetektor 1 bereitgestellte Ergebnissignal keinen Isolationsfehler an, dann steuert das Steuergerät 2 die Leistungselektronik 3 und den Starter 4 derart an, dass das Hybridfahrzeug H im Normalbetrieb arbeitet.If the result signal provided by the insulation fault detector 1 does not indicate an insulation fault, the control unit 2 controls the power electronics 3 and the starter 4 in such a way that the hybrid vehicle H operates in normal operation.
In diesem Normalbetrieb wird von der Traktionsbatterie 7 abgeleitete Gleichspannung, die beispielsweise 300 V beträgt, in einem Pulswechselrichter der Leistungselektronik 3 in eine Wechselspannung umgesetzt, mittels welcher der elektrische Antrieb 8 des Hybridfahrzeugs versorgt wird. Dieser wiederum stellt über die Leistungselektronik 3 Energie zum Betrieb der Gleichstromverbraucher 9 und der Wechselstromverbraucher 10 zur Verfügung, wobei die von den Gleichstromverbrauchern 9 benötigte Energie in der Leistungselektronik 3 mittels eines Gleichspannungswandlers gewonnen wird. In diesem rein elektrischen Be- trieb des Hybridfahrzeugs H ist die Verbrennungskraftmaschine 6 nicht aktiviert.In this normal operation, DC voltage derived from the traction battery 7, which is, for example, 300 V, is converted into an AC voltage in a pulse inverter of the power electronics 3, by means of which the electric drive 8 of the hybrid vehicle is supplied. This in turn provides via the power electronics 3 energy for the operation of the DC consumers 9 and the AC consumer 10, wherein the energy required by the DC loads 9 in the power electronics 3 is obtained by means of a DC-DC converter. In this purely electrical operation of the hybrid vehicle H, the internal combustion engine 6 is not activated.
Treten im Fahrbetrieb des Hybridfahrzeugs H starke Belastungen auf oder fällt der Ladezustand der Traktionsbatterie 7 unter einen vorgegebenen Schwellenwert ab, dann steuert das Steuergerät 2 den Starter 5 an, welcher die Verbren- nungskraftmaschine 6 startet. Diese unterstützt dann den elektrischen Antrieb 8 bei der Versorgung der Stromverbraucher des Hybridfahrzeugs.If heavy loads occur during driving operation of the hybrid vehicle H or the charge state of the traction battery 7 falls below a predetermined threshold value, then the control unit 2 activates the starter 5, which starts the internal combustion engine 6. This then supports the electric drive 8 in the supply of power consumers of the hybrid vehicle.
In Ruhephasen des Hybridfahrzeugs kann die Traktionsbatterie 7 unter Verwendung von aus der Verbrennungskraftmaschine 6 abgeleiteter Energie nachgela- den werden. In der vorstehend beschriebenen Normalbetriebsart des Hybridfahrzeugs stehen alle Funktionen des Hybridfahrzeugs zur Verfügung. Dazu gehören ein rein elektrischer Antrieb des Fahrzeugs, ein Start-Stopp-Betrieb des Fahrzeugs, ein regeneratives Bremsen des Fahrzeugs, bei welchem eine Energierekuperation er- folgt, und eine zumindest weitgehend drehzahlbegrenzungsfreie Beschleunigung des Fahrzeugs.At rest periods of the hybrid vehicle, the traction battery 7 can be nachgela- using using derived from the internal combustion engine 6 energy. In the normal mode of the hybrid vehicle described above, all functions of the hybrid vehicle are available. These include a purely electric drive of the vehicle, a start-stop operation of the vehicle, a regenerative braking of the vehicle, in which an energy recuperation takes place, and an at least largely speed-limiting acceleration of the vehicle.
Zeigt das vom Isolationsfehlerdetektor 1 bereitgestellte Ergebnissignal das Vorliegen eines Isolationsfehlers an, dann leitet das Steuergerät 2 eine Notlaufbe- triebsart in die Wege, in welcher die Verfügbarkeit des Hybridfahrzeugs weiterhin gewährleistet ist, ohne Einbußen der Sicherheit des Hybridfahrzeugs in Kauf nehmen zu müssen.If the result signal provided by the insulation fault detector 1 indicates the presence of an insulation fault, the control unit 2 initiates a runflat mode in which the availability of the hybrid vehicle is still ensured without having to compromise the safety of the hybrid vehicle.
In dieser Notlaufbetriebsart des Hybridfahrzeugs sorgt das Steuergerät 2 dafür, dass ein sofortiger Start der Verbrennungskraftmaschine 6 in die Wege geleitet wird, dass das Hybridfahrzeug nicht im rein elektrischen Betrieb betrieben werden kann, dass das Hybridfahrzeug nicht im Start-Stopp-Betrieb betrieben werden kann, dass das Hybridfahrzeug nicht im regenerativen Bremsbetrieb betrieben werden kann und dass vorzugsweise auch eine Drehzahlbegrenzung akti- viert wird.In this emergency running mode of the hybrid vehicle, the control unit 2 ensures that an immediate start of the internal combustion engine 6 is initiated in such a way that the hybrid vehicle can not be operated in purely electrical operation, that the hybrid vehicle can not be operated in start-stop mode, that the hybrid vehicle can not be operated in regenerative braking mode and that preferably also a speed limitation is activated.
Durch ein Unterbinden des Start-Stopp-Betriebes wird beispielsweise erreicht, dass nach einem Ampelstopp eine Weiterfahrt des Hybridfahrzeugs gewährleistet ist. Durch ein Unterbinden des regenerativen Bremsens wird sichergestellt, dass im Falle eines Ausfalls der Traktionsbatterie keine kritischen Fahrsituationen auftreten können. Durch eine eventuelle Drehzahlbegrenzung wird das Vorliegen eines Isolationsfehlers in das Bewusstsein des Fahrers gebracht, so dass dieser dazu motiviert wird, eine Werkstatt aufzusuchen, um den vorliegenden Isolationsfehler beseitigen zu lassen. Dadurch wird dem Umstand Rechnung ge- tragen, dass beim Stand der Technik viele Fahrer beim Vorliegen eines erstenBy inhibiting the start-stop operation, it is achieved, for example, that after a stop of the traffic light a continuation of the journey of the hybrid vehicle is ensured. By inhibiting the regenerative braking ensures that in the event of failure of the traction battery no critical driving situations can occur. By limiting the speed if necessary, the presence of an insulation fault is brought into the consciousness of the driver, so that he is motivated to visit a workshop in order to have the existing insulation fault removed. This takes into account the fact that in the prior art, many drivers in the presence of a first
Isolationsfehlers noch keine Notwendigkeit sehen, das Fahrzeug reparieren zu lassen, obwohl sie optisch und/oder akustisch auf diesen Isolationsfehler aufmerksam gemacht werden. Das Vorliegen einer Drehzahlbegrenzung reduziert die Beschleunigung des Fahrzeugs und damit den Fahrspaß erheblich, so dass der Fahrer eher als beim Stand der Technik einen Anlass dazu sieht, das Fahrzeug reparieren zu lassen. Die Figur 2 zeigt ein Flussdiagramm zur Erläuterung der Arbeitsweise des in der Figur 1 gezeigte Steuergerätes 2 das insbesondere für ein Hybridfahrzeug einsetzbar ist.Insulation failure still see no need to have the vehicle repaired, although they are made visually and / or acoustically aware of this insulation fault. The presence of a speed limit significantly reduces the acceleration of the vehicle and thus the driving pleasure, so that the driver rather than the prior art sees an opportunity to have the vehicle repaired. FIG. 2 shows a flow chart for explaining the mode of operation of the control unit 2 shown in FIG. 1, which can be used in particular for a hybrid vehicle.
Im Schritt S1 erfolgt eine Betätigung des Zündschalters 4 des Hybridfahrzeugs.In step S1, the ignition switch 4 of the hybrid vehicle is actuated.
Daraufhin initialisiert das Steuergerät 2 im Schritt S2 den Isolationsfehlerdetektor 1 , so dass dieser eine Messung des Isolationswiderstandes der Traktionsbatterie 7 durchführt und dabei erhaltene Ergebnissignale an das Steuergerät 2 ausgibt.Subsequently, the control unit 2 initializes the insulation fault detector 1 in step S2, so that the latter performs a measurement of the insulation resistance of the traction battery 7 and outputs result signals obtained to the control unit 2.
Im Steuergerät 2 erfolgt im Schritt S3 eine Abfrage, ob ein Isolationsfehler vorliegt oder nicht. Liegt kein Isolationsfehler vor, dann wird zum Schritt S10 übergegangen, gemäß welchem eine vorgegebene Zeitdauer abgewartet wird, bis zum Schritt S2 zurückgesprungen wird, um erneut den Isolationsfehlerdetektor zur Messung des Isolationswiderstandes zu initialisieren. Wird hingegen im Schritt S3 festgestellt, dass ein Isolationsfehler vorliegt, dann wird zum Schritt S4 übergegangen.In the control unit 2, a query is made in step S3, whether an insulation fault is present or not. If there is no insulation fault, then it goes to step S10, according to which a predetermined period of time is waited until the step S2 is jumped back to re-initialize the insulation fault detector for measuring the insulation resistance. If, on the other hand, it is determined in step S3 that there is an insulation fault, then step S4 is entered.
Im Schritt S4 wird die Verbrennungskraftmaschine 6 vom Starter 5 gestartet und es erfolgt eine optische oder akustische Signalisierung des Vorliegens eines Iso- lationsfehlers. Im Schritt S5 erfolgt ein Unterbinden eines rein elektrischen Betriebes des Hybridfahrzeugs. Im Schritt S6 erfolgt ein Unterbinden eines regenerativen Bremsens, im Schritt S7 ein Unterbinden des Start-Stopp-Betriebes des Hybridfahrzeugs und im Schritt S8 wird eine Drehzahlbegrenzung des Hybridfahrzeugs in die Wege geleitet, bei welcher beispielsweise die Drehzahl in allen Vorwärtsgängen des Hybridfahrzeugs auf einen mittleren Drehzahlwert begrenzt wird. Im Schritt S9 ist das Verfahren beendet.In step S4, the internal combustion engine 6 is started by the starter 5 and there is an optical or acoustic signaling of the presence of an insulation fault. In step S5, a prohibition of purely electrical operation of the hybrid vehicle takes place. In step S6, a regenerative braking is inhibited, in step S7 inhibiting the start-stop operation of the hybrid vehicle and in step S8, a speed limit of the hybrid vehicle is initiated, in which, for example, the speed in all forward gears of the hybrid vehicle to a middle Speed value is limited. In step S9, the process is ended.
Die Schritte S4 bis S8 entsprechen einer Einleitung einer Notlaufbetriebsart, welche nach der Detektion des Vorliegens eines Isolationsfehlers eingeleitet wird. Die Reihenfolge dieser Schritte S4 - S8, die ohnehin in sehr kurzer Zeit nacheinander durchgeführt werden, kann auch vertauscht sein. Der Schritt S8 ist ein optionaler Schritt.The steps S4 to S8 correspond to an initiation of a limp home mode which is initiated after the detection of the presence of an insulation fault. The sequence of these steps S4-S8, which are carried out one after the other in a very short time, can also be reversed. Step S8 is an optional step.
Diese Notlaufbetriebsart wird eingeleitet, sobald das Vorliegen eines ersten Isola- tionsfehlers detektiert wird. Mit dieser Strategie wird die Verfügbarkeit des Fahrzeugs erhöht, ohne die Sicherheit zu reduzieren. Beim Stand der Technik, bei welchem nach dem Auftreten eines ersten Isolationsfehlers ein uneingeschränkter Weiterbetrieb des Fahrzeugs möglich ist, könnte im Unterschied dazu das Fahrzeug dann, wenn ein zweiter Isolationsfehler im rein elektrischen Betrieb auftritt, liegen bleiben, wenn die notwendige Reaktions- zeit zwischen der Erkennung des Isolationsfehlers und der Abschaltung desThis emergency operation mode is initiated as soon as the presence of a first insulation fault is detected. This strategy increases the availability of the vehicle without reducing safety. In the prior art, in which after the occurrence of a first insulation fault unrestricted continued operation of the vehicle is possible, in contrast, the vehicle could then, if a second insulation fault occurs in purely electrical operation, remain lying when the necessary reaction time between the Detection of insulation fault and shutdown of the
Hochspannungssystems nicht dazu ausreicht, die Verbrennungskraftmaschine zu starten, oder wenn der zweite Isolationsfehler auf der anderen Spannungsseite auftritt als der erste Isolationsfehler. In diesem Falle sind das Hochspannungssystem und der elektrische Antrieb kurzgeschlossen, so dass kein Moment auf- gebaut werden kann.High voltage system is not sufficient to start the internal combustion engine, or if the second insulation fault occurs on the other voltage side than the first insulation fault. In this case, the high-voltage system and the electric drive are short-circuited so that no torque can be built up.
Befindet sich beim Stand der Technik das Hybridfahrzeug beim Auftreten eines zweiten Isolationsfehlers in der Betriebsart des regenerativen Bremsens, so kann es durch einen Wegfall des Bremsmoments des elektrischen Antriebs zu einem kurzzeitigen Verlust an Verzögerung und damit zu Fahrinstabilitäten kommen.If, in the prior art, the hybrid vehicle is in the mode of regenerative braking when a second insulation fault occurs, a loss of braking torque of the electric drive can lead to a brief loss of deceleration and thus to instability in driving.
Alle diese vorgenannten Nachteile des Standes der Technik treten nicht auf, wenn nach dem Auftreten eines ersten Isolationsfehlers ein Notlaufbetrieb mit den erfindungsgemäßen Merkmalen eingeleitet wird. All of the aforementioned disadvantages of the prior art do not occur when an emergency operation with the features according to the invention is initiated after the occurrence of a first insulation fault.

Claims

Ansprüche claims
1. Steuergerät, insbesondere für ein Hybridfahrzeug, welches einen elektrischen Antrieb, eine Verbrennungskraftmaschine, eine Traktionsbatterie, eine Leistungselektronik, Stromverbraucher, ein Steuergerät und einen Isolations- fehlerdetektor aufweist, dadurch gekennzeichnet, dass das Steuergerät (2) beim Erkennen des Auftretens eines Isolationsfehlers eine Notlaufbetriebsart einleitet.1. Control device, in particular for a hybrid vehicle, which has an electric drive, an internal combustion engine, a traction battery, power electronics, power consumers, a control unit and an insulation fault detector, characterized in that the control unit (2) upon detection of the occurrence of an insulation fault a Emergency mode starts.
2. Steuergerät, insbesondere für ein Hybridfahrzeug nach Anspruch 1 , dadurch gekennzeichnet, dass das Steuergerät (2) beim Erkennen des Auftretens eines Isolationsfehlers ein Starten der Verbrennungskraftmaschine initiiert.2. Control device, in particular for a hybrid vehicle according to claim 1, characterized in that the control unit (2) initiates the starting of the internal combustion engine when detecting the occurrence of an insulation fault.
3. Steuergerät, insbesondere für ein Hybridfahrzeug nach Anspruch 2, dadurch gekennzeichnet, dass das Steuergerät (2) beim Erkennen des Auftretens ei- nes Isolationsfehlers einen rein elektrischen Fahrbetrieb des Hybridfahrzeugs unterbindet.3. Control device, in particular for a hybrid vehicle according to claim 2, characterized in that the control device (2) upon detection of the occurrence of an insulation fault prevents a purely electric driving operation of the hybrid vehicle.
4. Steuergerät, insbesondere für ein Hybridfahrzeug nach Anspruch 3, dadurch gekennzeichnet, dass das Steuergerät (2) beim Erkennen des Auftretens ei- nes Isolationsfehlers ein regenatives Bremsen unterbindet.4. Control device, in particular for a hybrid vehicle according to claim 3, characterized in that the control device (2) upon detection of the occurrence of an insulation fault prevents a regenerative braking.
5. Steuergerät, insbesondere für ein Hybridfahrzeug nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass das Steuergerät (2) beim Erkennen des Auftretens eines Isolationsfehlers einen Start-Stopp-Betrieb des Hybridfahr- zeugs unterbindet.5. Control device, in particular for a hybrid vehicle according to claim 3 or 4, characterized in that the control unit (2) when detecting the occurrence of an insulation fault prevents start-stop operation of the hybrid vehicle.
6. Steuergerät, insbesondere für ein Hybridfahrzeug nach einem der Ansprüche 3 - 5, dadurch gekennzeichnet, dass das Steuergerät (2) beim Erkennen des Auftretens eines Isolationsfehlers eine Drehzahlbegrenzung einlei- tet. 6. Control device, in particular for a hybrid vehicle according to one of claims 3 - 5, characterized in that the control unit (2) when detecting the occurrence of an insulation fault introduces a speed limit.
7. Verfahren zum Betreiben eines Steuergeräts, insbesondere für ein Hybridfahrzeug, welches einen elektrischen Antrieb und eine Verbrennungskraftmaschine aufweist, mit folgenden Schritten:7. A method for operating a control device, in particular for a hybrid vehicle having an electric drive and an internal combustion engine, comprising the following steps:
Initialisieren eines Isolationsfehlerdetektors, Überprüfen, ob ein Isolationsfehler vorliegt undInitialize an insulation fault detector, check if there is an insulation fault and
Einleiten einer Notlaufbetriebsart, wenn das Vorliegen eines Isolationsfehlers erkannt wird.Initiating a limp home mode when the presence of an isolation fault is detected.
8. Verfahren zum Betreiben eines Steuergeräts, insbesondere für ein Hybrid- fahrzeug nach Anspruch 7, dadurch gekennzeichnet, dass im Rahmen der8. A method for operating a control device, in particular for a hybrid vehicle according to claim 7, characterized in that in the context of
Einleitung der Notlaufbetriebsart ein Starten der Verbrennungskraftmaschine erfolgt.Initiation of the Notlaufbetriebsart starting the internal combustion engine takes place.
9. Verfahren zum Betreiben eines Steuergeräts, insbesondere für ein Hybrid- fahrzeug nach Anspruch 8, dadurch gekennzeichnet, dass im Rahmen der9. A method for operating a control device, in particular for a hybrid vehicle according to claim 8, characterized in that in the context of
Einleitung der Notlaufbetriebsart ein rein elektrischer Fahrbetrieb des Hybridfahrzeugs unterbunden wird.Initiation of the emergency mode, a purely electric driving operation of the hybrid vehicle is prevented.
10. Verfahren zum Betreiben eines Steuergeräts, insbesondere für ein Hybrid- fahrzeug nach Anspruch 9, dadurch gekennzeichnet, dass im Rahmen der10. A method for operating a control device, in particular for a hybrid vehicle according to claim 9, characterized in that in the context of
Einleitung der Notlaufbetriebsart ein regeneratives Bremsen des Hybridfahrzeugs unterbunden wird.Initiation of the emergency mode regenerative braking of the hybrid vehicle is prevented.
1 1. Verfahren zum Betreiben eines Steuergeräts, insbesondere für ein Hybrid- fahrzeug nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass im Rahmen der Einleitung der Notlaufbetriebsart ein Start-Stopp-Betrieb des Hybridfahrzeugs unterbunden wird.1 1. A method for operating a control device, in particular for a hybrid vehicle according to claim 9 or 10, characterized in that in the context of the initiation of the emergency mode, a start-stop operation of the hybrid vehicle is prevented.
12. Verfahren zum Betreiben eines Steuergeräts, insbesondere für ein Hybrid- fahrzeug nach einem der Ansprüche 9 - 1 1 , dadurch gekennzeichnet, dass im Rahmen der Einleitung der Notlaufbetriebsart eine Drehzahlbegrenzung eingeleitet wird. 12. A method for operating a control device, in particular for a hybrid vehicle according to one of claims 9 - 1 1, characterized in that a speed limit is initiated in the context of the initiation of the emergency mode.
EP10709512A 2009-05-11 2010-03-18 Controller, in particular for a hybrid vehicle having an electric drive and an internal combustion engine, and method for operating a hybrid vehicle Withdrawn EP2429847A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009002991A DE102009002991A1 (en) 2009-05-11 2009-05-11 Control unit, in particular for a hybrid vehicle with an electric drive and an internal combustion engine, and method for operating a hybrid vehicle
PCT/EP2010/053497 WO2010130482A1 (en) 2009-05-11 2010-03-18 Controller, in particular for a hybrid vehicle having an electric drive and an internal combustion engine, and method for operating a hybrid vehicle

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EP2429847A1 true EP2429847A1 (en) 2012-03-21

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EP10709512A Withdrawn EP2429847A1 (en) 2009-05-11 2010-03-18 Controller, in particular for a hybrid vehicle having an electric drive and an internal combustion engine, and method for operating a hybrid vehicle

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US (1) US8761994B2 (en)
EP (1) EP2429847A1 (en)
DE (1) DE102009002991A1 (en)
WO (1) WO2010130482A1 (en)

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DE102009002991A1 (en) 2010-11-18
US20120109435A1 (en) 2012-05-03
US8761994B2 (en) 2014-06-24
WO2010130482A1 (en) 2010-11-18

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