DE102019215809A1 - Method for operating a hybrid drive train for a motor vehicle - Google Patents
Method for operating a hybrid drive train for a motor vehicle Download PDFInfo
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- DE102019215809A1 DE102019215809A1 DE102019215809.9A DE102019215809A DE102019215809A1 DE 102019215809 A1 DE102019215809 A1 DE 102019215809A1 DE 102019215809 A DE102019215809 A DE 102019215809A DE 102019215809 A1 DE102019215809 A1 DE 102019215809A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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- 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
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- 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
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
- B60K6/54—Transmission for changing ratio
- B60K6/547—Transmission for changing ratio the transmission being a stepped gearing
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- 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
- B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/92—Hybrid vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/60—Inputs being a function of ambient conditions
- F16H59/66—Road conditions, e.g. slope, slippery
- F16H2059/663—Road slope
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/0234—Adapting the ratios to special vehicle conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
- F16H2061/166—Preventing or initiating shifts for preventing stall or overspeed of engine
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- 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
Abstract
Verfahren zum Betrieb eines Hybridantriebstrangs für ein Kraftfahrzeug (X), wobei der Hybridantriebstrang ein Getriebe (G) mit mehreren Gangstufen sowie eine elektrische Maschine (EM) aufweist, welche mit einer Eingangswelle (GW1) des Getriebes (G) verbunden ist, wobei zur Vermeidung einer unerwünscht hohen Drehzahl der elektrischen Maschine (EM) bei Vorliegen einer definierten Bedingung selbsttätig in eine höhere Gangstufe gewechselt wird, wobei die definierte Bedingung von einer vorliegenden Fahrsituation des Kraftfahrzeugs (X) abhängig ist, sowie elektronische Steuereinheit (ECU) zur Durchführung eines solchen Verfahrens, sowie Kraftfahrzeug (X) mit einer solchen Steuereinheit (ECU).Method for operating a hybrid drive train for a motor vehicle (X), wherein the hybrid drive train has a transmission (G) with several gear stages and an electric machine (EM) which is connected to an input shaft (GW1) of the transmission (G), whereby to avoid an undesirably high speed of the electric machine (EM) is automatically changed to a higher gear when a defined condition is present, the defined condition being dependent on the driving situation of the motor vehicle (X), as well as the electronic control unit (ECU) for carrying out such a method , as well as motor vehicle (X) with such a control unit (ECU).
Description
Die Erfindung betrifft ein Verfahren zum Betrieb eines Hybridantriebstrangs für ein Kraftfahrzeug. Die Erfindung betrifft ferner eine elektronische Steuereinheit zur Steuerung von Funktionen eines solchen Antriebstrangs, sowie ein Kraftfahrzeug mit einer solchen Steuereinheit.The invention relates to a method for operating a hybrid drive train for a motor vehicle. The invention also relates to an electronic control unit for controlling functions of such a drive train, as well as a motor vehicle with such a control unit.
Die Patentanmeldung
Es ist Aufgabe der Erfindung, das im Stand der Technik bekannte Verfahren weiterzuentwickeln.It is the object of the invention to further develop the method known in the prior art.
Die Aufgabe wird gelöst durch die Merkmale des Patentanspruchs 1. Eine weitere Lösung der Aufgabe ergibt sich durch die Merkmale des Patentanspruchs 11. Vorteilhafte Ausführungen ergeben sich aus den abhängigen Ansprüchen, der Beschreibung sowie aus den Figuren.The object is achieved by the features of patent claim 1. A further solution to the problem results from the features of
Zur Lösung der Aufgabe wird ein Verfahren zum Betrieb eines Hybridantriebstrangs für ein Kraftfahrzeug vorgeschlagen, wobei der Hybridantriebstrang ein Getriebe mit mehreren Gangstufen sowie eine elektrische Maschine aufweist, welche mit einer Eingangswelle des Getriebes verbunden ist. Die elektrische Maschine kann entweder direkt oder über ein Übersetzungsgetriebe mit der Eingangswelle des Getriebes verbunden sein. Das Übersetzungsgetriebe kann derart ausgebildet sein, dass die Drehzahl der elektrischen Maschine im Verhältnis zur Drehzahl der Eingangswelle des Getriebes vergrößert wird.To achieve the object, a method for operating a hybrid drive train for a motor vehicle is proposed, the hybrid drive train having a transmission with several gear stages and an electric machine which is connected to an input shaft of the transmission. The electrical machine can be connected to the input shaft of the transmission either directly or via a transmission gear. The transmission gear can be designed in such a way that the speed of the electric machine is increased in relation to the speed of the input shaft of the transmission.
Zur Vermeidung einer unerwünscht hohen Drehzahl der elektrischen Maschine wird bei Vorliegen einer definierten Bedingung selbsttätig in eine höhere Gangstufe gewechselt. Durch diese Maßnahme wird die Drehzahl der Eingangswelle und der damit verbundenen elektrischen Maschine reduziert.In order to avoid an undesirably high speed of the electric machine, the system automatically changes to a higher gear when a defined condition is present. This measure reduces the speed of the input shaft and the electrical machine connected to it.
Erfindungsgemäß ist die definierte Bedingung von einer vorliegenden Fahrsituation des Kraftfahrzeugs abhängig. Durch eine solche Abhängigkeit kann eine unerwünschte Hochschaltung in Fahrsituationen vermieden werden, die keine Gefährdung für die elektrische Maschine bedeuten. Somit können unerwünschte Hochschaltungen in Situationen, in welchen der Fahrer des Kraftfahrzeugs bewusst eine hohe Zugkraft des Kraftfahrzeugs anfordert, vermieden werden.According to the invention, the defined condition is dependent on an existing driving situation of the motor vehicle. Such a dependency makes it possible to avoid an undesired upshift in driving situations that do not pose a risk to the electrical machine. In this way, undesired upshifts in situations in which the driver of the motor vehicle consciously requests a high tractive effort from the motor vehicle can be avoided.
Vorzugsweise wird bei der vorliegenden Fahrsituation das aktuell vom Kraftfahrzeug befahrene Gefälle berücksichtigt, sodass der selbsttätige Wechsel in eine höhere Gangstufe bei einem stärkeren Gefälle früher ausgelöst wird als bei einem geringeren Gefälle. Eine solche Vorgehensweise beruht auf der Erkenntnis, dass die Durchführung einer Schaltung bei einem Getriebe mit daran gekoppelter elektrischer Maschine langsamer ist als bei einem herkömmlichen Antrieb ohne elektrische Maschine, besonders bei klauengeschalteten Getrieben. Denn zur Durchführung der Hochschaltung muss zunächst das Drehmoment, welches an der bei der Hochschaltung auszulegenden Klaue anliegt, soweit abgebaut werden, dass die Klaue geöffnet werden kann. Die Massenträgheit des Rotors der elektrischen Maschine kann das Auslegen des eingelegten Gangs zusätzlich verzögern. All diese Randbedingungen führen dazu, dass die Zeit zwischen Auslegen des Gangs und Einlegen des höheren Gangs verlängert wird. Bei starkem Gefälle kann dies zu einer unerwünscht hohen Beschleunigung des Kraftfahrzeugs führen. Allein durch die Verzögerung des Gangauslegens kann bereits eine Situation entstehen, in der die Maximaldrehzahl der elektrischen Maschine überschritten wird. Wird das vorliegend befahrene Gefälle jedoch berücksichtigt, so kann eine solche Situation vermieden werden.In the present driving situation, the slope currently being traveled by the motor vehicle is preferably taken into account, so that the automatic change to a higher gear step is triggered earlier on a steep slope than on a smaller slope. Such a procedure is based on the knowledge that the implementation of a shift in a transmission with an electric machine coupled to it is slower than in a conventional drive without an electric machine, especially in the case of claw-shift transmissions. Because in order to carry out the upshift, the torque that is applied to the claw to be disengaged during the upshift must first be reduced to such an extent that the claw can be opened. The inertia of the rotor of the electrical machine can also delay the disengagement of the engaged gear. All of these boundary conditions mean that the time between disengaging the gear and engaging the higher gear is increased. In the case of a steep gradient, this can lead to an undesirably high acceleration of the motor vehicle. The delay in disengaging a gear alone can cause a situation in which the maximum speed of the electrical machine is exceeded. However, if the incline currently being traveled is taken into account, such a situation can be avoided.
Vorzugsweise wird bei der vorliegenden Fahrsituation die aktuell vom Kraftfahrzeug befahrene Steigung berücksichtigt. Wird eine ansteigende Fahrbahn oder sogar eine ebene Fahrbahn erkannt, so wird der selbsttätige Wechsel in eine höhere Gangstufe nicht durchgeführt, auch wenn eine verhältnismäßig hohe Drehzahl der elektrischen Maschine vorliegt. Derart kann der Betriebsbereich des Antriebs unter Verwendung der Zugkraftreserven bestmöglich ausgenutzt werden.In the present driving situation, the slope currently being traveled by the motor vehicle is preferably taken into account. If an ascending roadway or even a level roadway is detected, the automatic change to a higher gear step is not carried out, even if the electric machine is rotating at a relatively high speed. In this way, the operating range of the drive can be optimally utilized using the tractive force reserves.
Gemäß einer bevorzugten Ausgestaltung wird bei der vorliegenden Fahrsituation die Masse des Kraftfahrzeugs berücksichtigt. Bei der Masse handelt es sich insbesondere um die vorliegende Masse des Kraftfahrzeugs, also inklusive Beladung. Dies ist besonders bei schweren Nutzfahrzeugen wesentlich. Die Fahrzeugmasse kann mittels verschiedener Sensoren des Kraftfahrzeugs ermittelt werden, beispielsweise anhand eines Druckes der Luftfederung oder anhand eines Vergleichs zwischen der Beschleunigung des Kraftfahrzeugs und dem dafür aufgewendeten Antriebsmoment. Je höher die festgestellte Fahrzeugmasse, desto früher soll selbsttätig in einen höheren Gang gewechselt werden.According to a preferred embodiment, the mass of the motor vehicle is taken into account in the present driving situation. The mass is, in particular, the present mass of the motor vehicle, that is to say including the load. This is particularly important in the case of heavy commercial vehicles. The vehicle mass can be determined using various sensors of the motor vehicle, for example using a pressure of the air suspension or using a comparison between the acceleration of the motor vehicle and the drive torque used for it. The higher the determined vehicle mass, the earlier it should automatically change to a higher gear.
Vorzugsweise wird bei der vorliegenden Fahrsituation der im Getriebe eingelegte Gang und/oder die Geschwindigkeit des Kraftfahrzeugs berücksichtigt. Beispielsweise kann bei höheren Gangstufen die Spreizung zwischen den Gängen kleiner sein als bei kleineren Gangstufen, sodass der drehzahlreduzierende Effekt der Hochschaltung bei höheren Gängen geringer ausfällt als bei kleineren Gängen. Ist die vorliegende Geschwindigkeit noch gering, so ist Beschleunigung im Gefälle höher als bei einer bereits verhältnismäßig hohen Geschwindigkeit.In the present driving situation, the gear engaged in the transmission and / or the speed of the motor vehicle is taken into account. For example, with higher gear steps the spread between the gears can be smaller than with smaller gear steps, so that the speed-reducing effect of the upshift is less in higher gears than in smaller gears. If the current speed is still low, the acceleration on a downhill gradient is higher than at an already relatively high speed.
Vorzugsweise wird bei der vorliegenden Fahrsituation die Drehzahl und/oder die Drehbeschleunigung der elektrischen Maschine berücksichtigt. Bei noch sehr geringer und schwach ansteigender Drehzahl kann der selbsttätige Wechsel in eine höhere Gangstufe bewusst nicht durchgeführt werden. Derart kann der Betriebsbereich des Antriebs unter Verwendung der Zugkraftreserven bestmöglich ausgenutzt werden.
Unter Berücksichtigung ausgewählter oder all dieser Faktoren kann somit ein unnötiges Hochschalten effizient vermieden werden, ohne die Bauteilsicherheit der elektrischen Maschine aufgrund von Überdrehzahl zu gefährden.In the present driving situation, the rotational speed and / or the rotational acceleration of the electrical machine is preferably taken into account. If the engine speed is still very low and increasing slightly, the automatic change to a higher gear cannot be carried out on purpose. In this way, the operating range of the drive can be optimally utilized using the tractive force reserves.
Taking into account selected or all of these factors, unnecessary upshifts can be efficiently avoided without endangering the component safety of the electrical machine due to overspeed.
Vorzugsweise wird das Verfahren in einem manuellen Schaltmodus des Getriebes durchgeführt. In einem solchen manuellen Schaltmodus werden die Schaltstufen des Getriebes nicht anhand einer Schaltstrategie gewählt, sondern anhand von Vorgaben des Fahrers des Kraftfahrzeugs. Es ist üblich, in einem solchen manuellen Schaltmodus selbsttätige Schaltungen durchzuführen oder manuell vorgegebene Schaltungen zu verhindern, beispielsweise um ein Abwürgen des Verbrennungsmotors zu verhindern. Die Grenzdrehzahl des Elektromotors ist dem Fahrer des Kraftfahrzeugs üblicherweise jedoch nicht bewusst, und auch akustisch nicht unmittelbar wahrnehmbar. Die Berücksichtigung dieser Grenze im manuellen Schaltmodus verbessert somit die Betriebssicherheit des Kraftfahrzeugs. Selbstverständlich kann das Verfahren auch in einem automatischen Betriebsmodus des Getriebes durchgeführt werden.The method is preferably carried out in a manual shift mode of the transmission. In such a manual shift mode, the gear stages of the transmission are not selected on the basis of a shift strategy, but rather on the basis of specifications from the driver of the motor vehicle. It is customary to carry out automatic shifts in such a manual shift mode or to prevent manually specified shifts, for example in order to prevent the internal combustion engine from stalling. However, the driver of the motor vehicle is usually not aware of the limit speed of the electric motor, and it is also not directly perceptible acoustically. Taking this limit into account in the manual shift mode thus improves the operational safety of the motor vehicle. Of course, the method can also be carried out in an automatic operating mode of the transmission.
Zur Lösung der Aufgabe wird ferner eine elektronische Steuereinheit vorgeschlagen. Die elektronische Steuereinheit ist zur Steuerung von Funktionen des Hybridantriebsstrangs des Kraftfahrzeugs eingerichtet, und kann beispielsweise dem Getriebe des Kraftfahrzeugs zugeordnet sein. Die elektronische Steuereinheit kann mit weiteren elektronischen Steuereinheiten in Kommunikationsverbindung stehen, beispielsweise mit einer Steuereinheit des Verbrennungsmotors. Die elektronische Steuereinheit ist zur Durchführung des eingangs beschriebenen Verfahrens eingerichtet.An electronic control unit is also proposed to achieve the object. The electronic control unit is set up to control functions of the hybrid drive train of the motor vehicle and can, for example, be assigned to the transmission of the motor vehicle. The electronic control unit can be in communication with further electronic control units, for example with a control unit of the internal combustion engine. The electronic control unit is set up to carry out the method described at the beginning.
Die elektronische Steuereinheit kann Bestandteil eines Kraftfahrzeugs sein, insbesondere eines schweren Lastkraftwagens. Denn die der Erfindung zugrundeliegende Problemstellung kann insbesondere bei Kraftfahrzeugen mit einer hohen Masse auftreten.The electronic control unit can be part of a motor vehicle, in particular a heavy truck. This is because the problem on which the invention is based can occur in particular in motor vehicles with a high mass.
Ein Ausführungsbeispiel der Erfindung ist nachfolgend anhand der beigefügten Figuren detailliert beschrieben. Es zeigen:
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1 eine schematische Darstellung eines Antriebsstrangs für ein Kraftfahrzeug; -
2 eine schematische Darstellung eines Kraftfahrzeugs.
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1 a schematic representation of a drive train for a motor vehicle; -
2 a schematic representation of a motor vehicle.
Der Antriebsstrang umfasst im gezeigten Ausführungsbeispiel den Verbrennungsmotor
Das Getriebe
Das Hauptgetriebe
Die Splitgruppe
Das Losrad der ersten Übersetzungsstufe
Die dem Hauptgetriebe
Zur Vermeidung einer unerwünscht hohen Drehzahl der elektrischen Maschine
Erfindungsgemäß ist die definierte Bedingung von einer vorliegenden Fahrsituation des Kraftfahrzeugs
Beispielsweise wird dabei das aktuell vom Kraftfahrzeug
Unter Berücksichtigung ausgewählter oder all dieser Faktoren kann somit ein unnötiges Hochschalten effizient vermieden werden, ohne die Bauteilsicherheit der elektrischen Maschine
BezugszeichenlisteList of reference symbols
- XX
- KraftfahrzeugMotor vehicle
- GG
- Getriebetransmission
- 33
- AbtriebDownforce
- VMVM
- VerbrennungsmotorInternal combustion engine
- KOKO
- TrennkupplungDisconnect clutch
- GW1GW1
- EingangswelleInput shaft
- EMEM
- Elektrische MaschineElectric machine
- GW2GW2
- AusgangswelleOutput shaft
- 99
- HauptgetriebeMain transmission
- 1010
- SplitgruppeSplit group
- 1111
- BereichsgruppeArea group
- 1212th
- SynchronschaltelementSynchronous switching element
- 1313th
- SynchronschaltelementSynchronous switching element
- 1414th
- SchaltpaketSwitching package
- 1515th
- SchaltelementSwitching element
- 1616
- SchaltelementSwitching element
- 1717th
- SchaltpaketSwitching package
- 1818th
- SchaltelementSwitching element
- 1919th
- SchaltelementSwitching element
- 2020th
- SchaltpaketSwitching package
- 2121
- VorgelegewelleCountershaft
- 2222nd
- VorgelegewelleCountershaft
- 2323
- SchaltpaketSwitching package
- 2424
- PlanetengetriebePlanetary gear
- 2525th
- SonnenradSun gear
- 2626th
- HohlradRing gear
- 2727
- PlanetenträgerPlanet carrier
- K1, K2K1, K2
- ÜbersetzungsstufenTranslation levels
- G1, G2, G3G1, G2, G3
- ÜbersetzungsstufenTranslation levels
- RR.
- ÜbersetzungsstufeTranslation stage
- LL.
- LangsamfahrstufeLow speed level
- SS.
- SchnellfahrstufeHigh speed
- ECUECU
- Elektronische SteuereinheitElectronic control unit
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDED IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturPatent literature cited
- DE 102008043560 A1 [0002]DE 102008043560 A1 [0002]
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019215809.9A DE102019215809A1 (en) | 2019-10-15 | 2019-10-15 | Method for operating a hybrid drive train for a motor vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019215809.9A DE102019215809A1 (en) | 2019-10-15 | 2019-10-15 | Method for operating a hybrid drive train for a motor vehicle |
Publications (1)
Publication Number | Publication Date |
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DE102019215809A1 true DE102019215809A1 (en) | 2021-04-15 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102019215809.9A Pending DE102019215809A1 (en) | 2019-10-15 | 2019-10-15 | Method for operating a hybrid drive train for a motor vehicle |
Country Status (1)
Country | Link |
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DE (1) | DE102019215809A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008050959A1 (en) * | 2008-10-09 | 2010-04-15 | Daimler Ag | Method for operating automatic gearbox in vehicle, involves carrying out change between multiple gears of automatic gearbox, where switch points between gears are determined by coordinate values of characteristic diagram |
DE102008043560A1 (en) * | 2008-11-07 | 2010-05-12 | Zf Friedrichshafen Ag | Method for controlling an automated stepped gearbox |
DE102009057989A1 (en) * | 2009-12-11 | 2011-06-16 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Drive system operating method for motor vehicle, involves switching transmission if no delay of vehicle occurs at maximum recuperation moment such that drive axle is connected with drive device by smaller translation of transmission |
DE102013013954A1 (en) * | 2013-08-21 | 2015-02-26 | Audi Ag | Drive device for a hybrid vehicle |
DE112009001997B4 (en) * | 2008-10-15 | 2016-08-11 | Toyota Jidosha Kabushiki Kaisha | Shift control for an automatic transmission |
-
2019
- 2019-10-15 DE DE102019215809.9A patent/DE102019215809A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008050959A1 (en) * | 2008-10-09 | 2010-04-15 | Daimler Ag | Method for operating automatic gearbox in vehicle, involves carrying out change between multiple gears of automatic gearbox, where switch points between gears are determined by coordinate values of characteristic diagram |
DE112009001997B4 (en) * | 2008-10-15 | 2016-08-11 | Toyota Jidosha Kabushiki Kaisha | Shift control for an automatic transmission |
DE102008043560A1 (en) * | 2008-11-07 | 2010-05-12 | Zf Friedrichshafen Ag | Method for controlling an automated stepped gearbox |
DE102009057989A1 (en) * | 2009-12-11 | 2011-06-16 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Drive system operating method for motor vehicle, involves switching transmission if no delay of vehicle occurs at maximum recuperation moment such that drive axle is connected with drive device by smaller translation of transmission |
DE102013013954A1 (en) * | 2013-08-21 | 2015-02-26 | Audi Ag | Drive device for a hybrid vehicle |
Non-Patent Citations (1)
Title |
---|
Kraftfahrt Bundesamt: Verzeichnis zur Systematisierung von Kraftfahrzeugen und ihren Anhängern. Juli 2018, https://www.kba.de/SharedDocs/Publikationen/DE/Statistik/SV/sv1_2018_07_pdf.html?nn=645894#download=1 [online]. * |
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