DE19528629A1 - Operation of drive for hybrid vehicle - has motor speed automatically limited when used as sole prime mover, either by using current limitation or by decoupling engine - Google Patents

Operation of drive for hybrid vehicle - has motor speed automatically limited when used as sole prime mover, either by using current limitation or by decoupling engine

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Publication number
DE19528629A1
DE19528629A1 DE1995128629 DE19528629A DE19528629A1 DE 19528629 A1 DE19528629 A1 DE 19528629A1 DE 1995128629 DE1995128629 DE 1995128629 DE 19528629 A DE19528629 A DE 19528629A DE 19528629 A1 DE19528629 A1 DE 19528629A1
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Germany
Prior art keywords
characterized
method according
electric motor
drive
motor
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DE1995128629
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German (de)
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Audi AG
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Audi AG
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Priority to DE1995128629 priority Critical patent/DE19528629A1/en
Publication of DE19528629A1 publication Critical patent/DE19528629A1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08Conjoint 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT 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
    • B60K6/00Arrangement 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
    • B60K6/20Arrangement 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
    • B60K6/42Arrangement 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
    • B60K6/48Parallel type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L3/00Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L50/00Electric propulsion with power supplied within the vehicle
    • B60L50/10Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/15Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with additional electric power supply
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L7/00Electrodynamic brake systems for vehicles in general
    • B60L7/24Electrodynamic brake systems for vehicles in general with additional mechanical or electromagnetic braking
    • B60L7/26Controlling the braking effect
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/10Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels by utilising wheel movement for accumulating energy, e.g. driving air compressors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/18Conjoint control of vehicle sub-units of different type or different function including control of braking systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/42Drive Train control parameters related to electric machines
    • B60L2240/421Speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W2510/00Input parameters relating to a particular sub-units
    • B60W2510/08Electric propulsion units
    • B60W2510/081Speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W2710/00Output or target parameters relating to a particular sub-units
    • B60W2710/08Electric propulsion units
    • B60W2710/081Speed
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/62Hybrid vehicles
    • Y02T10/6213Hybrid vehicles using ICE and electric energy storage, i.e. battery, capacitor
    • Y02T10/6221Hybrid vehicles using ICE and electric energy storage, i.e. battery, capacitor of the parallel type
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies for applications in electromobilty
    • Y02T10/642Control strategies of electric machines for automotive applications
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y02T10/7077Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors on board the vehicle

Abstract

A hybrid drive for a vehicle has an IC engine as a primary energy source and an electric motor as a secondary one. In one operating regime, the IC engine can be decoupled and the motor used alone. In this regime, the motor speed is monitored and if above a certain threshold, automatic procedures are invoked to prevent further increase. One procedure is to reduce the motor current. Other procedures are to switch the motor into generator or braking mode, to recouple the IC engine, to activate a warning lamp saying "operate the brakes" and to activate automatic braking. The brakes have ABS and ASR.

Description

Die Erfindung betrifft ein Verfahren zum Betreiben eines Hybridfahrzeuges mit einer Primär-Antriebsquelle, insbesondere einer Brennkraftmaschine und einem Elektromotor als sekundäre Antriebsquelle, gemäß dem Oberbegriff des Patentanspruches 1. The invention relates to a method for operating a hybrid vehicle having a primary drive source, in particular an internal combustion engine and an electric motor as a secondary driving source, according to the preamble of claim 1.

Ein derartiges Hybridfahrzeug ist beispielsweise in der DE 44 36 383 A1 beschrieben. Such a hybrid vehicle is described for example in DE 44 36 383 A1. Dabei sind auf ein gemeinsames Schaltgetriebe einerseits ein Dieselmotor und andererseits ein Elektromotor geschaltet, die entweder alternativ oder gleichzeitig das Kraftfahrzeug antreiben. Here, a diesel engine and on the other hand, an electric motor one hand, are connected to a common transmission, either alternatively or simultaneously drive the motor vehicle. Über den Elektro motor kann dabei zugleich durch entsprechende Drehzahlverarbeitung und Gangerfassung eine Synchronisierung der zu schaltenden Getriebegänge bewirkt werden. About the electric motor synchronization to be switched gears can be achieved while at the same time by appropriate speed processing and transition detection.

Eine Eigenheit des nur elektromotorischen Antriebes ist dessen Ge räuschlosigkeit, die zur Erzielung einer verschleißarmen und verbrauchs günstigen Fahrweise die Bedienungsperson vermehrt zur Beobachtung des ggf. vorhandenen Drehzahlmessers zwingt. A peculiarity of only electromotive drive is räuschlosigkeit whose Ge, which forces to achieve a low-wear and low-consumption driving, the operator increased to observe the possibly existing tachometer. Dem steht jedoch oft die Ver kehrssituation oder andere ablenkende Einflüsse gegenüber. often, however, the situation is returning to United or other distracting influences over.

Aufgabe der Erfindung ist es, bei einem Hybridfahrzeug der gattungsge mäßen Art insbesondere den nur elektromotorischen Betriebsbereich zu verbessern. Object of the invention is to improve in a hybrid vehicle of the type gattungsge Maessen in particular the electric motor only operating range.

Diese Aufgabe wird erfindungsgemäß mit den kennzeichnenden Merkmalen des Patentanspruches 1 gelöst. This object is achieved with the characterizing features of claim 1. Vorteilhafte Weiterbildungen der Erfindung sind den weiteren Patentansprüchen entnehmbar. Advantageous developments of the invention are specified in the further claims.

Erfindungsgemäß wird vorgeschlagen, daß die Drehzahl des Elektromotors überwacht wird und daß oberhalb einer definierten Drehzahlschwelle auto matisch Maßnahmen zur Vermeidung von Überdrehzahlen des Elektromo tors gesteuert werden. According to the invention that the speed of the electric motor is monitored and in that matically measures to prevent overspeeding of the Elektromo tors be controlled above a defined rotational speed threshold car is proposed. Die Maßnahmen können dabei entweder ein Zurück fahren der Stromversorgung des Elektromotors über den Stromregler und/oder ein Umsteuern des Elektromotors als Generator oder Bremse und/oder ein Ankuppeln der Brennkraftmaschine als zusätzliche Bremse und/oder schließlich ein Ansteuern der Betriebsbremse des Kraftfahrzeuges sein. The measures can be either a return drive power of the electric motor via the current regulator and / or a reversal of the electric motor as a generator or brake and / or a coupling of the internal combustion engine as an additional brake and / or eventually be controlling the service brake of the motor vehicle.

So kann beispielsweise im elektromotorischen Betrieb beim Einfahren in ein Gefälle vermieden werden, daß durch relativ schnellen Drehzahlanstieg der ohnehin schnell drehende Elektromotor überdreht wird, ohne daß die Bedie nungsperson akustisch vorgewarnt und dementsprechend reagieren kann. Thus can be avoided in the electromotive operation when entering a slope for example, that of the already rapidly rotating electric motor is overdriven by a relatively rapid increase in speed without the Bedie voltage person can respond audibly warned and, accordingly. Steigt die Drehzahl des Elektromotors beispielsweise auf dessen definierte Höchstdrehzahl an, so kann unabhängig von der Leistungsanforderung (Gaspedalstellung) durch die Bedienungsperson zunächst die Stromver sorgung zurückgeregelt, anschließend der Elektromotor als Bremse geschal tet werden und sofern dies nicht ausreicht, um die Drehzahlschwelle zu hal ten, als nächster Schritt die Brennkraftmaschine angekuppelt und als Brem se betrieben und/oder automatisch die Betriebsbremse des Kraftfahrzeuges betätigt werden. Increases the speed of the electric motor to, for example, to its defined maximum speed, then, irrespective of the power demand (accelerator pedal position) by the operator initially Stromver supply regulated back, then the electric motor are used as brake geschal tet and if this is not sufficient to reduce the speed threshold to hal th are coupled as the next step, the internal combustion engine and operated as Brem se and / or automatically actuates the service brake of the motor vehicle. Die Ansteuerung der Betriebsbremse kann bevorzugt durch Ansteuerung eines vorhandenen Anti-Blockier-Systems der Betriebsbremse oder eines Anti-Schlupf-Systems mit Bremseneingriff der Antriebssteuerung bewerkstelligt werden. The actuation of the service brake may be accomplished by activation of an existing anti-lock braking system of the service brake or an anti-skid system with braking intervention of the drive control preferred.

In Weiterbildung der Erfindung kann die Drehzahlüberwachung zur einer Geschwindigkeitsregelung erweitert werden, so daß nicht nur die Höchst drehzahl des Elektromotors, sondern auch frei definierbare Betriebsdrehzah lschwellen einstellbar und entsprechend überwachbar sind. In the invention, the speed monitoring can be extended to a speed control, so that not only the maximum speed of the electric motor, but also user-definable Betriebsdrehzah lschwellen are adjustable and accordingly monitored. Dabei kann es angezeigt sein, die Betriebsdrehzahlschwellen nur durch Stromregelung zu halten, während bei Erreichen der definierten Höchstdrehzahl die weiteren Bremsmaßnahmen automatisch eingeleitet werden. These can be displayed to keep the operating speed thresholds only by current control, while the other braking measures are initiated automatically when reaching the maximum speed defined.

Ein Ausführungsbeispiel der Erfindung ist im folgenden mit weiteren Einzel heiten näher erläutert. An embodiment of the invention is explained below with further units single detail. Die Zeichnung zeigt ein Blockschaltbild eines Hybrid antriebes für ein Kraftfahrzeug mit einer Antriebseinheit mit einem Verbren nungsmotor und einem Elektromotor und Einrichtungen zum Steuern der Drehzahl des Elektromotors. The drawing shows a block diagram of a hybrid drive for a motor vehicle with a drive unit with a motor voltage Burn and an electric motor and means for controlling the rotational speed of the electric motor.

Der dargestellte Hybridantrieb setzt sich im wesentlichen zusammen aus ei nem Verbrennungsmotor 10 , einer elektrohydraulischen Trennkupplung 12 , einem Geschwindigkeits-Wechselgetriebe 14 und einem Elektromotor 16 , die der besseren Darstellung wegen in Abschnitte geteilt gezeichnet sind, tatsächlich aber zu einer Antriebseinheit zusammengebaut sind. The hybrid drive system shown is essentially composed of egg nem internal combustion engine 10, an electro-hydraulic clutch 12, a speed change gear 14 and an electric motor 16, which are shown divided into sections of the better because representation, actually but assembled into a drive unit.

Der Verbrennungsmotor 10 kann z. The engine 10 z can. B. ein direkt einspritzender Turbodie selmotor sein, dessen an die Kurbelwelle angeflanschte Schwungscheibe 18 Teil der als Schwungnutzautomatik ausgeführten Trennkupplung 12 mit ei ner hydraulischen Betätigung - bestehend aus einer hydraulischen Nehmer zylinder 20 und einer Hydraulikeinheit 22 mit Pumpe, Steuerventilen, Druck speicher, etc. - und einer Steuerelektronik 24 ist. Example, a direct injection Turbodie selmotor whose flanged to the crankshaft flywheel 18 of the separating clutch is designed as a Schwungnutzautomatik 12 with egg ner hydraulic actuator - consisting of a hydraulic slave cylinder 20 and a hydraulic unit 22, with pump control valves, pressure accumulator, etc. and an electronic control unit 24 -.

Die Trennkupplung 12 ist mit der Antriebswelle 26 des Wechselgetriebes 14 verbunden, dessen Abtriebswelle 28 ein Antriebsritzel 30 für den nicht näher dargestellten Achsantrieb bzw. das Differential 32 für den Antrieb der Vor derräder 34 des Kraftfahrzeuges trägt. The separating clutch 12 is connected to the drive shaft 26 of the gearbox 14, the output shaft 28, a drive pinion 30 which carries the final drive, not shown, or differential 32 for driving the wheels of the motor vehicle before the 34th Im Ausführungsbeispiel sind wie er sichtlich über eine nicht dargestellte Schaltbetätigung vier Gangstufen I-IV bzw. Übersetzungen des Wechselgetriebes 14 schaltbar. In the embodiment, as clearly are switched via a non-illustrated shift operating four grades I-IV or translations of the transmission fourteenth Es könnte aber auch ein stufenloses CVT-Getriebe oder ein Stufenautomat verwendet sein. but it could be used as a continuously variable CVT or a step machine.

Der Elektromotor 16 , ein Drehstrom-Synchronmotor mit relativ geringem Massenträgheitsmoment wirkt über eine Zahnrad-Vorgelegestufe 36 ohne Zwischenschaltung einer Kupplung direkt auf das andere Ende der Antriebs welle 26 des Wechselgetriebes 14 . The electric motor 16, a three-phase synchronous motor with relatively low moment of inertia acting on a gear countershaft stage 36 without the interposition of a coupling on the other end of the drive shaft 26 of the transmission fourteenth Die Vorgelegestufe 36 könnte beispiels weise bei einem Fünf-Gang Wechselgetriebe unmittelbar durch den fünften Gang gebildet sein, bei vier Nutzgängen. The countershaft stage 36 could example, in a five-speed change gear being directly formed by the fifth gear in four Nutzgängen.

Der Elektromotor 16 ist an eine Stromversorgungseinheit 38 mit Batterien 40 und einer Stromregeleinheit 42 angeschlossen und kann als Antriebsmotor, als Generator zum Aufladen der Batterien 40 bei verbrennungsmotorischen Betrieb, im Leerlauf und schließlich als Synchronisator für das Wechselge triebe 14 arbeiten. The electric motor 16 is connected to a power supply unit 38 including batteries 40 and connected to a current control unit 42 and 14 can operate as a drive motor, as a generator to recharge the batteries 40 in combustion engine mode, idling and finally as a synchronizer for the Wech Selge gear.

Der Elektromotor 16 kann dabei mittels eines Betriebsartenschalters 44 auf nur Elektroantrieb geschaltet werden, wobei dessen Antriebsleistung dann über das Gaspedal 46 und die Stromregelungseinheit 42 gesteuert wird. The electric motor 16 may be switched on only electric drive by means of a mode selector switch 44, whereby its motive power then the accelerator pedal 46 and the current control unit is controlled 42nd

Beim Umschalten auf Betrieb mit Verbrennungsmotor 10 kann der Elektro motor 16 als Generator betrieben werden, sofern die Batterien 40 regene riert werden, andernfalls kann der Elektromotor 16 im Leerlauf mitbetrieben oder kurzfristig zur Erhöhung der Antriebsleistung als zusätzliche Antriebs quelle wirken. On switching to operation with internal combustion engine 10, the electric motor 16 may be operated as a generator, if the batteries are 40 regene riert, otherwise the electric motor 16 can mitbetrieben idle or operate at short notice to increase the drive power as an additional drive source.

Sobald über die nicht dargestellte Schaltbetätigung des Wechselgetriebes 14 eine Gangänderung i eingeleitet wird - dies wird von der Steuerelektronik 24 der Trennkupplung 12 durch in die Schaltbetätigung integrierte elektri sche Schalter und/oder Potentiometer erkannt - wird die Trennkupplung 12 ausgerückt und zugleich der Elektromotor 16 als Synchronisator aktiviert. Once a gear change is initiated i via the unillustrated shift operation of the transmission 14 - this is detected by the control electronics 24 of the clutch 12 through integrated in the switching operation of electrical-specific switches and / or potentiometers - the separating clutch 12 is disengaged and at the same time the electric motor 16 as a synchronizer activated. Dabei berechnet die Steuerelektronik des Stromreglers 42 anhand von Drehzahlsignalen n der Abtriebswelle 28 und von Gangsignalen i des zu schaltenden Ganges des Wechselgetriebes 14 die erforderliche Solldreh zahl der Antriebswelle 26 , vergleicht diese mit einem lst-Drehzahlsignal und steuert über die Stromregeleinheit 42 ein positive oder negative Beschleuni gung des Elektromotors 16 zur Erzielung eines Synchronlaufes der zu schaltenden Übersetzungsstufe. The electronic control of the current controller 42 calculates based on speed signals n the output shaft 28 and of transition signals i of the to be switched gear of the transmission 14, the required target speed of the drive shaft 26, compares it with an actual speed signal and controls via the current control unit 42 is a positive or negative Accelerati supply of the electric motor 16 to achieve a synchronous running of the to be switched transmission stage.

Ferner wird über die Steuerelektronik der Stromregelungseinheit 42 aus den Signalen i und n ständig die Drehzahl des Elektromotores 16 überwacht. Furthermore, via the control electronics of the flow control unit 42 from the signals i and n constantly monitors the speed of the electric motor sixteenth Wird im elektromotorischen Betrieb eine definierte Drehzahlschwelle des Elektromotors 16 erreicht, so wird die Stromversorgung des Elektromotors 16 begrenzt bzw. zurückgefahren, um einem Überschreiten dieser Drehzahl schwelle entgegenzuwirken. Is achieved a defined rotational speed threshold of the electric motor 16 in the electric motor mode, the power supply of the electric motor 16 is restricted or cut back in order to counteract this speed threshold is exceeded.

Reicht diese erste Maßnahme nicht aus, so wird in einem weiteren Schritt über die Stromregelungseinheit 42 der Elektromotor 16 als Generator bzw. Bremse geschaltet. Is not enough, this first measure, so in a further step on the current control unit 42 of the electric motor 16 is switched as a generator or brake. Diese Schaltung kann auch in Intervallen zur Erzeugung einer Stotterbremse erfolgen, um die Aufmerksamkeit der Bedienungsperson zu wecken. This circuit can also be made at intervals to produce an intermittent brake in order to attract the attention of the operator.

Reicht auch diese Maßnahme nicht aus, beispielsweise weil das Hybridfahr zeug ein Gefälle passiert, so wird als weitere Bremse der Turbodieselmotor 10 durch Schließen der Trennkupplung 12 an die Antriebseinheit angekup pelt. Extends this measure not, for example, because the hybrid driving convincing a fall happens, then pelt angekup as a further brake on the turbo diesel engine 10 by closing the clutch 12 to the drive unit.

Alternativ oder zusätzlich wird über die Steuerelektronik der Stromrege lungseinheit 42 die Steuerelektronik 48 eines nicht näher dargestellten ABS- Bremssystems angesteuert und über letztere die Betriebsbremse 50 des Kraftfahrzeuges betätigt, wobei diese Betätigung gleitend zur Einhaltung der definierten Drehzahlschwelle des Elektromotors 16 und eines komfortablen ruckfreien Fahrverhalten erfolgt. Alternatively or additionally, is driven and operated by the latter, the service brake 50 of the motor vehicle averaging unit via the control electronics of the flow control passage 42, the control electronics 48 of an ABS braking system, not shown, wherein this operation is carried slidingly to adherence to the defined rotational speed threshold of the electric motor 16 and a comfortable jerk-free drivability ,

Ferner kann ein in der Funktion ähnlich einer Geschwindigkeitsregelanlage auf bestimmte Geschwindigkeiten setzbarer Schalter 52 vorgesehen sein, der im nur elektromotorischem Betrieb auch Drehzahlschwellen des Elek tromotors 16 unterhalb der Höchstdrehzahlschwelle setzen kann, wobei die Steuerelektronik der Stromregelungseinheiten 42 dann automatisch und ohne erforderliche Betätigung des Gaspedales 46 diese Geschwindigkeit bzw. Drehzahlschwelle einregelt. Further, a similar to a cruise control system settable in function to certain speeds switch 52 may be provided that can seat 16 below the maximum speed threshold in only electromotive operation even speed thresholds of Elek tromotors, wherein the control electronics of the flow control units 42 automatically and without the need for actuation of the accelerator pedal 46 this speed or speed threshold adjusts. Zweckmäßigerweise werden die Maßnah men zur Bremsung des Hybridfahrzeuges unabhängig von der gesetzten Drehzahlschwelle bei Erreichen der Höchstdrehzahlschwelle aktiviert. Conveniently, the measures are men for braking of the hybrid vehicle, regardless of the set speed threshold is reached, the maximum speed threshold activated.

Claims (7)

1. Verfahren zum Betreiben eines Hybridfahrzeuges mit einer Primär-An triebsquelle, insbesondere einer Brennkraftmaschine, und einem Elek tromotor als sekundäre Antriebsquelle, wobei in einem Betriebsbereich die Brennkraftmaschine abkuppelbar und der Elektromotor als alleinige Antriebsquelle wirkt, dadurch gekennzeichnet, daß zumindest in diesem Betriebsbereich der Elektromotor ( 16 ) drehzahlüberwacht ist und daß oberhalb einer definierten Drehzahlschwelle automatisch Maßnahmen zur Vermeidung von Überdrehzahlen des Elektromotors gesteuert wer den. 1. A method for operating a hybrid vehicle having a primary-on drive source, in particular an internal combustion engine, and a Elek tromotor as a secondary driving source, wherein in an operating region of the internal combustion engine can be uncoupled and the electric motor as the only drive source acts, characterized in that at least in this operating range of the electric motor (16) is speed-controlled and that, above a defined rotational speed threshold automatically measures to prevent overspeeding of the electric motor controlled who the.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß in einem er sten Drehzahlverminderungsstatuts die Stormversorgung des Elektromo tors ( 16 ) zurückgefahren wird. 2. The method according to claim 1, characterized in that it in a most decelerating Regulations, the supply of the Storm Elektromo gate is moved back (16).
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in ei nem weiteren Drehzahlverminderungsstatus der Elektromotor ( 16 ) als Generator oder Bremse geschaltet wird. 3. The method of claim 1 or 2, characterized in that the electric motor (16) as a generator or brake is connected in egg nem further speed reduction state.
4. Verfahren nach einem oder mehreren der Ansprüche 1-3, dadurch ge kennzeichnet, daß in einem weiteren Drehzahlverminderungsstatus die Brennkraftmaschine ( 10 ) eingekuppelt wird. 4. The method according to one or more of claims 1-3, characterized in that in a further speed reduction state, the internal combustion engine (10) is engaged.
5. Verfahren nach einem oder mehreren der Ansprüche 1-4, dadurch ge kennzeichnet, daß in einem weiteren Drehzahlverminderungsstatus eine Warnleuchte "Bremse betätigen" oder eine automatische Bremsung über die Betriebsbremse ( 50 ) generiert wird. 5. The method according to one or more of claims 1-4, characterized in that in a further speed reduction state "press brake", a warning lamp or an automatic braking of the operating brake (50) is generated.
6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die Betriebs bremse ( 50 ) über ein elektronisches System ( 48 ) mit Bremseneingriff (ABS, ASR, etc.) generiert wird. 6. A method according to claim 5, characterized in that the service brake (50) via an electronic system (48) with the brakes (ABS, ASR, etc.) is generated.
7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß unterhalb der definierten Drehzahlschwelle weitere Drehzahlschwellen über einen Ge schwindigkeitsregler setzbar und über den Stromregler ( 42 ) regelbar sind. 7. The method according to claim 1, characterized in that below the defined rotational speed threshold more speed thresholds are settable schwindigkeitsregler a Ge and via the current regulator (42) adjustable.
DE1995128629 1995-08-04 1995-08-04 Operation of drive for hybrid vehicle - has motor speed automatically limited when used as sole prime mover, either by using current limitation or by decoupling engine Withdrawn DE19528629A1 (en)

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US8565969B2 (en) 2007-04-03 2013-10-22 Clean Emissions Technologies, Inc. Over the road/traction/cabin comfort retrofit
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US9758146B2 (en) 2008-04-01 2017-09-12 Clean Emissions Technologies, Inc. Dual mode clutch pedal for vehicle
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