DE102018221769A1 - Method for transmission synchronization of a hybrid vehicle - Google Patents
Method for transmission synchronization of a hybrid vehicle Download PDFInfo
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- DE102018221769A1 DE102018221769A1 DE102018221769.6A DE102018221769A DE102018221769A1 DE 102018221769 A1 DE102018221769 A1 DE 102018221769A1 DE 102018221769 A DE102018221769 A DE 102018221769A DE 102018221769 A1 DE102018221769 A1 DE 102018221769A1
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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
- F16H61/04—Smoothing ratio shift
- F16H61/0403—Synchronisation before shifting
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/38—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
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- 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
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- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
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- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
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- B60W30/19—Improvement of gear change, e.g. by synchronisation or smoothing gear shift
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- 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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- 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
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- B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B60W2710/1011—Input shaft speed, e.g. turbine speed
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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
- F16H61/04—Smoothing ratio shift
- F16H61/0403—Synchronisation before shifting
- F16H2061/0422—Synchronisation before shifting by an electric machine, e.g. by accelerating or braking the input shaft
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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
- F16H2306/00—Shifting
- F16H2306/40—Shifting activities
- F16H2306/48—Synchronising of new gear
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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
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- General Engineering & Computer Science (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Die Erfindung betrifft ein Verfahren (90) zur Getriebesynchronisation eines Hybridfahrzeuges, mit wenigstens einem elektrischen Antrieb (18) und einer Verbrennungskraftmaschine (14), welche beide mit einem Getriebe (22) wirkverbindbar sind, wobei das Getriebe (22) wenigstens eine Kupplung (26; 30) mit einer antriebsseitigen Kupplungshälfte (26a; 30a) und einer abtriebsseitigen Kupplungshälfte (26b; 30b), aufweist. Das Verfahren (90) umfasst dabei die Schritte des Bereitstellens eines ersten Signals mit einer Solldrehzahl (nsoll) und eines zweiten Signals mit einer Istdrehzahl (nist) der antriebsseitigen Kupplungshälfte (26a; 30a), des Regelns der Istdrehzahl (nist) der antriebsseitigen Kupplungshälfte (26a; 30a) auf die Solldrehzahl (nsoll), wobei der elektrische Antrieb (18) als Stellglied verwendet wird, des Begrenzens eines abgebbaren Drehmomentes (M) des elektrischen Antriebes (18), und des Schließens der Kupplung (26; 30). The invention relates to a method (90) for the transmission synchronization of a hybrid vehicle, with at least one electric drive (18) and an internal combustion engine (14), both of which can be operatively connected to a transmission (22), the transmission (22) having at least one clutch (26 ; 30) with a drive-side coupling half (26a; 30a) and an output-side coupling half (26b; 30b). The method (90) comprises the steps of providing (to n) of a first signal with a target speed and a second signal with an actual speed (n) of the drive-side coupling half (26a; 30a) of regulating the actual speed (n ist) of drive-side coupling half (26a; 30a) (to n) to the setpoint speed, wherein the electrical drive (18) is used as the actuator, of defining a dispensable torque (M) of the electric drive (18) and closing the clutch (26; 30).
Description
Die vorliegende Erfindung betrifft ein Verfahren zur Getriebesynchronisation eines Hybridfahrzeuges und eine Vorrichtung zum Durchführen eines solchen Verfahrens.The present invention relates to a method for transmission synchronization of a hybrid vehicle and a device for performing such a method.
Bei Hybrid-Fahrzeugen, bei denen das Fahrzeug über einen Verbrennungsmotor und/oder einem elektrischen Antrieb antreibbar ist, wird der entsprechende Antrieb über ein Getriebe mit einer Antriebsachse verbunden, so dass das Fahrzeug antreibbar ist. Um die Gänge zu wechseln werden dabei über Kupplungen Schaltvorgänge durchgeführt. Damit während des Schaltvorganges ein möglichst ruckfreies Schalten ermöglicht wird, werden in der Regel die Drehzahlen der Kupplungshälften einer Kupplung synchronisiert.In hybrid vehicles in which the vehicle can be driven by an internal combustion engine and / or an electric drive, the corresponding drive is connected to a drive axle via a transmission, so that the vehicle can be driven. In order to change gears, clutches are carried out. The speeds of the clutch halves of a clutch are generally synchronized so that shifting is as smooth as possible during the shifting process.
Stand der TechnikState of the art
Die
Der Hintergrund der Erfindung liegt darin, dass um ein schnelles Umschalten der Übersetzungsverhältnisse im Getriebe zu ermöglichen, insbesondere bei einem Getriebe mit Klauenkupplung zu ermöglichen, müssen die Drehzahlen an den beiden einzukuppelnden Kupplungshälften, z.B. Klauen oder Kupplungsscheiben, schnell und präzise synchronisiert werden, d.h. auf die gleiche Drehzahl gebracht werden. Das geschieht in der Regel durch getriebeinterne, mechanische Synchronisationselemente, welche eine der beiden Kupplungshälften beschleunigt oder verzögert. Getriebeinterne, mechanische Synchronisationselemente sind kostenintensiv und benötigen Bauraum.The background of the invention lies in the fact that in order to enable a quick switching of the gear ratios in the transmission, in particular in the case of a transmission with a dog clutch, the speeds at the two clutch halves to be engaged, e.g. Claws or clutch disks can be synchronized quickly and precisely, i.e. be brought to the same speed. This is usually done by means of internal mechanical synchronization elements which accelerate or decelerate one of the two coupling halves. Gearbox-internal, mechanical synchronization elements are cost-intensive and require installation space.
Alternativ, kann der elektrische Antrieb dazu verwendet werden, die Drehzahl am Getriebeeingang zu beschleunigen oder zu verzögern, bis die beiden einzukuppelnden Kupplungshälften nahezu die gleiche Drehzahl aufweisen. Bei diesem Prozess der Synchronisierung muss das Getriebe den elektrischen Antrieb steuern. Hierzu sendet das Getriebe die aktuell benötigte Solldrehzahl an den elektrischen Antrieb. Der elektrische Antrieb regelt die Drehzahl der antriebsseitigen Kupplungshälfte auf die geforderte Solldrehzahl ein. Weil das Einregeln der Drehzahl möglichst schnell erfolgen muss, insbesondere wenn die Solldrehzahl stark von der aktuellen Drehzahl der antriebsseitigen Kupplungshälfte abweicht, benötigt der elektrische Antrieb ein hohes Drehmoment und eine hohe Regeldynamik. Statische und dynamische Regelabweichungen des elektrischen Antriebs führen dabei zu Abweichungen der Drehzahlen.Alternatively, the electric drive can be used to accelerate or decelerate the speed at the transmission input until the two coupling halves to be coupled have almost the same speed. In this synchronization process, the transmission must control the electric drive. For this purpose, the gearbox sends the currently required target speed to the electric drive. The electric drive adjusts the speed of the coupling half on the drive side to the required target speed. Because the speed must be adjusted as quickly as possible, especially if the target speed deviates significantly from the current speed of the drive-side coupling half, the electric drive requires high torque and high control dynamics. Static and dynamic control deviations of the electric drive lead to deviations in the speeds.
Sobald die Kupplungshälften anfangen ineinander zu greifen, wird der elektrische Antrieb aufgrund der mechanischen Kopplung ruckartig auf die erforderliche Drehzahl gebracht. Dies erfordert eine verstärkte, d.h. kostenintensive, Auslegung der Kupplungshälften. Des Weiteren minder die ruckartig Kopplung den Fahrkomfort. Dies führt in der Regel zu einer Ablehnung dieser Alternativlösung.As soon as the coupling halves start to mesh, the electrical drive is suddenly brought up to the required speed due to the mechanical coupling. This requires an increased, i.e. costly, design of the coupling halves. Furthermore, the jerky coupling reduces driving comfort. This usually leads to the rejection of this alternative solution.
Es ist daher die Aufgabe der vorliegenden Erfindung ein Verfahren bereitzustellen, mit welchem der elektrische Antrieb zum Synchronisieren der Drehzahl verwendbar ist, und bei welchem eine hohe Belastung der Kupplungshälften einer Kupplung vermieden und der Fahrkomfort verbessert wird.It is therefore the object of the present invention to provide a method with which the electric drive can be used to synchronize the rotational speed, and with which a high load on the coupling halves of a coupling is avoided and driving comfort is improved.
Offenbarung der ErfindungDisclosure of the invention
Die Aufgabe wird durch ein Verfahren zur Getriebesynchronisation eines Hybridfahrzeuges mit den Merkmalen nach Anspruch 1 gelöst. Anspruch 9 gibt eine Vorrichtung zum Durchführen des erfindungsgemäßen Verfahrens an. Die jeweils rückbezogenen abhängigen Ansprüche geben vorteilhafte Weiterbildungen der Erfindung wieder.The object is achieved by a method for transmission synchronization of a hybrid vehicle with the features according to claim 1. Claim 9 specifies an apparatus for performing the method according to the invention. The dependent claims, which refer back in each case, represent advantageous developments of the invention.
Verfahren zur Getriebesynchronisation eines Hybridfahrzeuges, mit wenigstens einem elektrischen Antrieb und einer Verbrennungskraftmaschine, welche beide mit einem Getriebe wirkverbindbar sind, wobei das Getriebe wenigstens eine Kupplung mit einer antriebsseitigen Kupplungshälfte und einer abtriebsseitigen Kupplungshälfte, aufweist. Das Verfahren umfasst dabei die Schritte des Bereitstellens eines ersten Signals mit einer Solldrehzahl und eines zweiten Signals mit einer Istdrehzahl der antriebsseitigen Kupplungshälfte, des Regelns der Istdrehzahl der antriebsseitigen Kupplungshälfte auf die Solldrehzahl, wobei der elektrische Antrieb als Stellglied verwendet wird, des Begrenzens eines abgebbaren Drehmomentes des elektrischen Antriebes, und des Schließens der Kupplung.Method for gearbox synchronization of a hybrid vehicle, with at least one electric drive and an internal combustion engine, both of which can be operatively connected to a gearbox, the gearbox having at least one clutch with a clutch half on the drive side and a clutch half on the output side. The method comprises the steps of providing a first signal with a target speed and a second signal with an actual speed of the drive-side coupling half, regulating the actual speed of the drive-side coupling half to the target speed, the electric drive being used as an actuator, and limiting an output torque of the electric drive, and the closing of the clutch.
Als Solldrehzahl im Sinne der Erfindung wird eine Drehzahl verstanden, welche für ein Einkuppeln von zwei Kupplungshälften benötigt wird. Die Solldrehzahl der antriebsseitigen Kupplungshälfte wird dabei von der Drehzahl der abtriebsseitigen Kupplungshälfte abgeleitet und entspricht beim Einkuppeln näherungsweise der Drehzahl der abtriebsseitigen Kupplungshälfte. Die Istdrehzahl der antriebsseitigen Kupplungshälfte wird durch einen Sensor erfasst und bestimmt. Die Kupplungshälften der Antriebsseite und Abtriebsseite können dabei durch entsprechende aus dem Stand der Technik bekannten Kupplung wie beispielsweise Scheibenkupplung oder Lamellenkupplung gebildet sein.A target speed in the sense of the invention is understood to mean a speed that is required for engaging two coupling halves. The target speed of the drive-side coupling half is derived from the speed of the output-side coupling half and corresponds to Engaging approximately the speed of the clutch half on the output side. The actual speed of the coupling half on the drive side is detected and determined by a sensor. The coupling halves of the drive side and driven side can be formed by a corresponding clutch known from the prior art, such as a disk clutch or a multi-plate clutch.
Wenn die Istdrehzahl der antriebsseitige Kupplungshälfte entsprechend der Solldrehzahl eingestellt werden soll, lässt der elektrische Antrieb bei einer großen Drehzahldifferenz zwischen Solldrehzahl und Istdrehzahl der antriebsseitigen Kupplungshälfte ein hohes abgebbares Drehmoment zu, um eine möglichst schnelle Getriebesynchronisation zu ermöglichen. Dieses Drehmoment entspricht dabei vorzugsweise dem maximalen durch die Nennleistung des elektrischen Antriebes vorgegebenen Drehmoment.If the actual speed of the drive-side coupling half is to be set in accordance with the target speed, the electric drive allows a high output torque in the event of a large speed difference between the target speed and the actual speed of the drive-side coupling half in order to enable the fastest possible gearbox synchronization. This torque preferably corresponds to the maximum torque specified by the nominal power of the electric drive.
Durch die Reduktion des abgebbaren Drehmomentes des elektrischen Antriebs kann eine hohe Belastung der Kupplung beim Einkuppeln verhindert werden. Dadurch wird die Beanspruchung der Kupplung wesentlich reduziert, so dass auf eine verstärkte, d.h. kostenintensive, Auslegung der Kupplungshälften verzichtet werden kann, so dass eine solche Kupplung wirtschaftlich herstellbar bleibt. Zudem wird das ruckartige Einkuppeln wesentlich reduziert, so dass der Fahrkomfort gesteigert wird.A high load on the clutch when engaging can be prevented by reducing the torque that can be output from the electric drive. This significantly reduces the stress on the coupling, so that the Costly, design of the coupling halves can be dispensed with, so that such a coupling remains economically producible. In addition, the jerky engagement is significantly reduced, so that driving comfort is increased.
In einer bevorzugten Ausführung der Erfindung erfolgt das Begrenzen des abgebbaren Drehmomentes derart, dass das maximale Drehmoment des elektrischen Antriebes reduziert wird. Das maximale Drehmoment ist dabei das durch die Nennleistung des elektrischen Antriebes maximal mögliche Drehmoment.In a preferred embodiment of the invention, the torque that can be output is limited in such a way that the maximum torque of the electric drive is reduced. The maximum torque is the maximum possible torque due to the nominal power of the electric drive.
Vorzugsweise wird das Begrenzen des abgebbaren Drehmomentes des elektrischen Antriebes in Abhängigkeit einer Drehzahldifferenz zwischen Solldrehzahl und Istdrehzahl der antriebssseitigen Kupplungshälfte durchgeführt. Mit einer Verkleinerung der Drehzahldifferenz und damit einer Annäherung an einen bevorzugten Kupplungspunkt wird das abgebbare Drehmoment reduziert. Mit einer Verkleinerung der Drehzahldifferenz wird zudem das benötigte Drehmoment, um eine Drehzahländerung herbeizuführen kleiner.The output torque of the electric drive is preferably limited as a function of a speed difference between the target speed and the actual speed of the coupling half on the drive side. The torque that can be output is reduced by reducing the speed difference and thus approaching a preferred coupling point. With a reduction in the speed difference, the torque required to bring about a speed change also becomes smaller.
Dadurch steht bei einem Kupplungspunkt lediglich ein kleines Drehmoment zur Verfügung, so dass die Kupplungselemente weniger belastet werden und damit kleiner auslegbar sind. Zudem wird dadurch ein ruckartiges Einkuppeln wesentlich verringert und damit der Fahrkomfort verbessert.As a result, only a small torque is available at a coupling point, so that the coupling elements are loaded less and can therefore be designed smaller. It also significantly reduces jerky engagement and improves driving comfort.
Bei einer bevorzugten Weiterbildung der Erfindung wird das Begrenzen des abgebbaren Drehmomentes anhand einer fest vorgegebenen Begrenzungsfunktion durchgeführt. Als Begrenzungsfunktion wird dabei eine mathematische Funktion verstanden, die abhängig von der Drehzahl, der Drehzahldifferenz oder dem Kupplungspunkt das abgebbare Drehmoment reduziert. Dadurch werden ebenso die Kupplungshälften weniger belastet und der Fahrkomfort wird verbessert.In a preferred development of the invention, the limitation of the torque that can be output is carried out on the basis of a predefined limiting function. A limiting function is understood to be a mathematical function which, depending on the speed, the speed difference or the coupling point, reduces the torque that can be output. This also puts less stress on the coupling halves and improves driving comfort.
Vorteilhafterweise wird das Begrenzen des abgebbaren Drehmomentes nach Erreichen der Solldrehzahl, einer definierten Drehzahl oder einer definierten Drehzahldifferenz zwischen Solldrehzahl und Istdrehzahl der antriebsseitigen Kupplungshälfte, durchgeführt. Nach Erreichen der Solldrehzahl, einer definierten Drehzahl oder einer definierten Drehzahldifferenz werden lediglich kleinere Drehzahlschwankungen ausgeglichen. Dazu ist jedoch ein kleines Drehmoment ausreichend. Die Kupplungshälften werden somit beim Einkuppeln weniger belastet. Zudem wird dadurch ein ruckartiges Einkuppeln verringert, so dass der Fahrkomfort verbessert wird.The limitation of the torque that can be output is advantageously carried out after reaching the target speed, a defined speed or a defined speed difference between the target speed and the actual speed of the clutch half on the drive side. After reaching the target speed, a defined speed or a defined speed difference, only minor speed fluctuations are compensated for. However, a small torque is sufficient for this. The coupling halves are thus less stressed when engaging. This also reduces jerky engagement so that driving comfort is improved.
Bei einer weiteren vorteilhaften Ausgestaltung wird eine Begrenzung des abgebbaren Drehmomentes nach Erreichen einer Drehzahldifferenz zwischen Solldrehzahl und Istdrehzahl der antriebsseitigen Kupplungshälfte, die kleiner 10% der Solldrehzahl ist, durchgeführt. Bei Erreichen einer solchen Drehzahldifferenz kann sichergestellt werden, dass lediglich kleinere Drehzahlschwankungen auszugleichen sind, bei welchem ein kleineres Drehmoment ausreichend ist.In a further advantageous embodiment, the torque which can be output is limited after a speed difference between the target speed and the actual speed of the drive-side clutch half, which is less than 10% of the target speed, is carried out. When such a speed difference is reached, it can be ensured that only smaller speed fluctuations have to be compensated for, at which a smaller torque is sufficient.
Bei einer bevorzugten Ausgestaltung wird das abgebbare Drehmoment um mindestens 20% reduziert. Besonders bevorzugt wird das abgebbare Drehmoment um mindestens 40% reduziert. Als Ausgangswert für die Reduktion des abgebbaren Drehmomentes wird dabei das abgebbare Drehmoment verwendet, welches vor Eintritt eines definierten Ereignisses vom elektrischen Antrieb abgegeben wird. Dieses Ereignis kann dabei das Erreichen der Solldrehzahl, einer definierten Drehzahl oder einer definierten Drehzahldifferenz sein. Durch solche Werte kann dabei sichergestellt werden, dass die Belastung an der Kupplung ausreichend klein ist, und dass ein ruckartiges Einkuppeln wesentlich reduziert wird.In a preferred embodiment, the torque that can be output is reduced by at least 20%. The torque that can be output is particularly preferably reduced by at least 40%. The output torque which is output by the electric drive before a defined event occurs is used as the output value for the reduction of the output torque. This event can be the reaching of the target speed, a defined speed or a defined speed difference. Such values can be used to ensure that the load on the clutch is sufficiently small and that jerky engagement is significantly reduced.
Vorzugsweise wird das abgebbare Drehmoment auf einen festen Wert begrenzt. Dieser Wert ist dabei von der Drehzahldifferenz unabhängig, so dass der Regelungsaufwand für den elektrischen Antrieb reduziert wird.The torque that can be output is preferably limited to a fixed value. This value is independent of the speed difference, so that the control effort for the electric drive is reduced.
Die Aufgabe der Erfindung wird zusätzlich durch eine Vorrichtung zum Durchführen des erfindungsgemäßen Verfahrens gelöst, wobei die Vorrichtung ein Getriebe mit wenigstens einer ersten Kupplung und einer zweiten Kupplung umfasst, über die Kupplungen ein Gang wechselbar ist, wobei die erste und zweite Kupplung jeweils eine antriebsseitige Kupplungshälfte und eine abtriebsseitige Kupplungshälfte aufweist. Des Weiteren umfasst die Vorrichtung eine Verbrennungskraftmaschine, welche zum Antreiben des Hybridfahrzeuges über die Kupplung mit einer Antriebsachse verbindbar ist, und einen elektrischen Antrieb, welcher zum Antreiben des Hybridfahrzeuges über die Kupplung mit der Antriebsachse verbindbar ist, wobei der elektrische Antrieb über ein Signalübertragungsmittel mit dem Getriebe verbunden ist, so dass eine Istdrehzahl und eine Solldrehzahl der antriebsseitigen Kupplungshälfte übertragbar ist.The object of the invention is additionally achieved by a device for carrying out the method according to the invention, the Device comprises a transmission with at least a first clutch and a second clutch, via which clutches a gear can be changed, the first and second clutches each having a drive-side clutch half and an output-side clutch half. Furthermore, the device comprises an internal combustion engine which can be connected to a drive axle for driving the hybrid vehicle via the clutch, and an electric drive which can be connected to the drive axle for driving the hybrid vehicle, the electric drive being connected to the via a signal transmission means Gearbox is connected so that an actual speed and a target speed of the drive-side coupling half can be transmitted.
Mit einer solchen Vorrichtung zum Durchführen des erfindungsgemäßen Verfahrens können die zu dem Verfahren genannten Vorteile erzielt werden.With such a device for performing the method according to the invention, the advantages mentioned for the method can be achieved.
Die Aufgabe der Erfindung wird darüber hinaus durch ein Hybridfahrzeug mit einer Vorrichtung zur Getriebesynchronisation bei welchem das erfindungsgemäße Verfahren zur Getriebesynchronisation durchgeführt wird, gelöst.The object of the invention is also achieved by a hybrid vehicle with a device for transmission synchronization in which the method for transmission synchronization according to the invention is carried out.
Ein solches Hybridfahrzeug weist die zu dem erfindungsgemäßen Verfahren genannten Vorteile auf.Such a hybrid vehicle has the advantages mentioned for the method according to the invention.
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigt:
-
1 Ausführungsbeispiel einer Vorrichtung zum Durchführen des erfindungsgemäßen Verfahrens, -
2 Ausführungsbeispiel des erfindungsgemäßen Verfahrens zur Getriebesynchronisation, -
3 Graph für die Begrenzung des abgebbaren Drehmomentes nach einem ersten Ausführungsbeispiel, und -
4 Graph für die Begrenzung des abgebbaren Drehmomentes nach einem zweiten Ausführungsbeispiel.
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1 Embodiment of a device for performing the method according to the invention, -
2nd Embodiment of the method for transmission synchronization according to the invention, -
3rd Graph for the limitation of the output torque according to a first embodiment, and -
4th Graph for the limitation of the output torque according to a second embodiment.
Über antriebsseitige Kupplungshälften
Entsprechend weisen die Kupplungen
In
In einem dritten Verfahrensschritt
In
Auch dadurch wird eine schnelle Drehzahlanpassung ermöglicht und das abgebbare Drehmoment
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE 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 documents listed by the applicant has been generated automatically and is only included 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
- WO 2011/042236 [0003]WO 2011/042236 [0003]
Claims (10)
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DE102018221769.6A DE102018221769A1 (en) | 2018-12-14 | 2018-12-14 | Method for transmission synchronization of a hybrid vehicle |
PCT/EP2019/085065 WO2020120733A1 (en) | 2018-12-14 | 2019-12-13 | Method for transmission synchronization of a hybrid vehicle |
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Citations (1)
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WO2011042236A1 (en) | 2009-10-08 | 2011-04-14 | Robert Bosch Gmbh | Method for operating a drive device and a drive device |
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DE102006019239A1 (en) * | 2006-04-26 | 2007-10-31 | Zf Friedrichshafen Ag | Gear change control method for automatic gearbox unit, involves aligning target gear unilaterally with large speed gradient at beginning and with small speed gradients to coupling at end of synchronization |
JP2008296778A (en) * | 2007-05-31 | 2008-12-11 | Toyota Motor Corp | Coupling device, transmission and power output device therewith, and control method for coupling device |
EP3184862B2 (en) * | 2015-12-23 | 2023-08-16 | Volvo Car Corporation | Control of electric motor |
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2018
- 2018-12-14 DE DE102018221769.6A patent/DE102018221769A1/en not_active Withdrawn
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WO2011042236A1 (en) | 2009-10-08 | 2011-04-14 | Robert Bosch Gmbh | Method for operating a drive device and a drive device |
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