WO2022253402A1 - Verfahren zum betrieb eines antriebsstranges und antriebsstrang - Google Patents
Verfahren zum betrieb eines antriebsstranges und antriebsstrang Download PDFInfo
- Publication number
- WO2022253402A1 WO2022253402A1 PCT/EP2021/064538 EP2021064538W WO2022253402A1 WO 2022253402 A1 WO2022253402 A1 WO 2022253402A1 EP 2021064538 W EP2021064538 W EP 2021064538W WO 2022253402 A1 WO2022253402 A1 WO 2022253402A1
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- WO
- WIPO (PCT)
- Prior art keywords
- clutch
- piston
- current
- components
- component
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000000977 initiatory effect Effects 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 9
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/102—Actuator
- F16D2500/1021—Electrical type
- F16D2500/1022—Electromagnet
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/102—Actuator
- F16D2500/1026—Hydraulic
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/104—Clutch
- F16D2500/10406—Clutch position
- F16D2500/10412—Transmission line of a vehicle
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/104—Clutch
- F16D2500/10443—Clutch type
- F16D2500/10462—Dog-type clutch
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3022—Current
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3026—Stroke
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/314—Signal inputs from the user
- F16D2500/31406—Signal inputs from the user input from pedals
- F16D2500/31413—Clutch pedal position
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/506—Relating the transmission
- F16D2500/50607—Facilitating engagement of a dog clutches, e.g. preventing of gear butting
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/506—Relating the transmission
- F16D2500/50653—Gearing shifting without the interruption of drive
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/506—Relating the transmission
- F16D2500/50684—Torque resume after shifting
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
- F16D2500/70402—Actuator parameters
- F16D2500/7041—Position
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
- F16D2500/70422—Clutch parameters
- F16D2500/70426—Clutch slip
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
- F16D2500/70422—Clutch parameters
- F16D2500/70432—From the input shaft
- F16D2500/70436—Input shaft speed
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
- F16D2500/70422—Clutch parameters
- F16D2500/70438—From the output shaft
- F16D2500/70442—Output shaft speed
Definitions
- the present invention relates to a method for operating a drive train and a drive train of a vehicle, in particular a vehicle sat.
- the drive train comprises at least one transmission housing and a clutch unit arranged therein with a positively acting clutch and an actuation unit for actuation of the clutch.
- the clutch comprises at least a first clutch component and a second clutch component, which are positively connected to one another when the clutch is actuated.
- Such a drive train is provided in particular for connecting an electric machine to a drive shaft or to a differential of a drive axle of the vehicle. It can rential a drive power of the electric machine z. B. be transferred to the wheels of the driving tool for driving the vehicle.
- the clutch is actuated when requested, e.g. B. by detecting a corresponding request from a higher-level controller or a user of the vehicle.
- the actuation unit comprises an electromagnetic actuator with a piston, the piston being displaced from an initial position into an end position in order to actuate the clutch. At least the piston and the clutch can be at least partially acted upon by a transmission fluid. Torque should be transmitted via the clutch components in particular only after a fully engaged state of the clutch components has been determined, in which they have a secured positive connection form a connection with each other. In this fully engaged state, the piston is located in the end position.
- At least the piston and the clutch can be located at least partially (or completely) in a transmission fluid, in particular an oil.
- the end position of the piston is reached as quickly as possible after the request to actuate the clutch is detected. Due to the inductance of an electromagnetic or magnet coil actuator and the associated resistance, the current build-up for generating the actuator actuating force is specified in terms of time. Taking into account a maximum control current, the current build-up cannot be improved in terms of control technology.
- the closing switching time of the clutch unit i.e. the time in which the piston, starting from the starting position, has reached the end position, cannot be improved with the magnetic coil actuator without increasing the maximum control current.
- an increase in the maximum control current requires that all current-carrying components, such as the power electronics, be designed to correspond to the higher maximum current load. This entails higher component costs.
- WO 2018/157950 A1 discloses a drive train with a Kupplungsaggre gat, which is arranged in a transmission housing.
- the object of the invention is therefore to solve the problems described with reference to the prior art, at least in part, and in particular to provide a method with which the clutch can be actuated more quickly.
- This is intended in particular to provide a drive train in which a torque ment can be transmitted more quickly via the clutch and made available to the wheels.
- a method for operating a drive train of a vehicle having at least one transmission housing and a clutch unit arranged therein with a positively acting clutch and an actuation unit for actuation of the clutch.
- the clutch e.g. a claw clutch
- the actuation unit includes an electromagnetic actuator with a piston. To actuate the clutch, the piston is displaced from an initial position along the axial direction to an end position. The first clutch component is actuated by the piston and displaced with the piston along the axial direction.
- the clutch components are only after reaching a state of synchronization, so if the speeds of the clutch components to be coupled z. B. differ only minimally, positively connected to each other. Torque is transmitted via the clutch components in particular only after a fully engaged state of the clutch components has been determined, with the piston being arranged in the end position in this first state.
- the method comprises at least the following steps: a) determining a request to actuate the clutch and to establish the form-fit connection of the clutch components with one another, in particular at a first point in time; b) energizing the actuator with a pre-current, the piston remaining arranged in the starting position, in particular at the first point in time; c) Initiating a synchronization of the speeds of the Kupplungkomponen th, in particular at the first time; d) determining that the clutch components have reached the synchronization state, in particular at a second point in time; e) Energizing the actuator with an actuating current, the piston being displaced from the starting position into the end position, in particular at the second point in time.
- Process steps a) to e) can be carried out in the suggested order. It is possible for the method steps to be carried out partially or completely in a time-overlapping manner. Steps b) to e) are initiated in particular after step a). It is preferred that all further steps b) to e) are carried out after step a). In particular, step b) is initiated at the same time as step c) and carried out at least temporarily in parallel. In particular, step b) is carried out until step e) is initiated. In particular, step e) is only carried out if the synchronization state is determined according to step d). In particular, when initiating step e), step b) has not yet been completed, ie z. B. the bias current may not have been increased to its intended value. It is preferred that the method proposed here is carried out for each actuation of the actuator triggered in the drive train and/or movement of the piston from the starting position.
- the drive train or the actuating unit comprises a system for data processing, e.g. B. a control unit that has means for executing the steps of the method or that is suitably equipped, configured or programmed to execute the steps of the method.
- the electromagnetic actuator comprises a coil which is supplied with an electric current in order to move the piston.
- step a) there is a determination of a request for loading actuation of the clutch, z. B. by the system, in particular at a first time.
- the request is made in particular by a higher-level control device or system or by a user of the vehicle.
- the system of the drive train or the actuating unit then initiates the further steps of the method, in particular steps b) and c), preferably parallel to one another and particularly preferably simultaneously, in particular at the first point in time or immediately thereafter.
- the request to actuate the clutch is aimed in particular at establishing the form-fitting connection between the hitch-up components.
- step b) the actuator is energized with a preliminary current, in particular through the system, with the piston remaining in the starting position.
- a preliminary current in particular through the system
- an electric current required to move the piston is not set.
- the preliminary flow is preferably as large as possible, although the piston should not move. Since the piston is not particularly deliberately held back, but in the The pre-current does not overcome the resistances present in the clutch assembly or in the actuation unit.
- the value of the pre-current can be determined in particular in preliminary tests on prototypes (and not on the actual clutch unit). Alternatively or additionally, the value of the pre-current can also be determined on the clutch unit that is actually present, e.g. B. as part of an inspection of the clutch unit, the drive train or a fully assembled vehicle or even during operation of a vehicle.
- the value of the bias current can be determined and determined repeatedly, e.g. B. depending on ambient conditions such. B. temperature or condition or type of transmission fluid. In this way, the largest possible bias current can be set for specific operating points.
- the value of a bias current can be continuously increased until movement of the piston is detected.
- the present value of the current acting on the actuator can then be multiplied by a safety factor (in particular less than “1”) so that a value for the pre-current is determined at which displacement of the piston can be ruled out with sufficient certainty.
- the value of the bias current determined in this way can e.g. B. stored in the system and retrieved later during operation of the vehicle.
- At least the piston and the clutch are at least partially acted upon by a transmission fluid. Movement of the piston can be inhibited to a greater extent precisely when there is a transmission fluid or the arrangement of the components in the transmission fluid. In particular, the bias current can be increased to a higher value.
- step c) synchronization of the speeds of the clutch components is initiated, in particular by the system, in particular to the first point in time or immediately thereafter. Step c) takes place as a result of the determination of a request to actuate the clutch according to step a). In step c), the speeds of the clutch components are synchronized with one another as quickly as possible.
- the clutch components determine that the synchronization state has been reached, in particular at a second point in time.
- the speeds of the clutch components must be the same as each other to such an extent that coupling of the clutch components is possible.
- the boundary conditions for the coupling e.g. B. the size of a maximum differential speed can be stored in the system and checked according to step d). The presence of a (minimal) speed difference is provided in particular, so that a coupling of the clutch components is possible.
- step e the actuator is energized with an actuating current, the piston being displaced from the starting position to the end position.
- the actuation current is significantly greater than the precurrent that was previously present.
- the resistances in the clutch unit, which are also present in particular in step b) are overcome and the piston is displaced along the axial direction for actuation of the clutch.
- Step e) takes place in particular at the second point in time or immediately thereafter.
- step b) has not yet been completed at the time step e) is initiated.
- the actual current may not yet have reached the value of the setpoint bias current that is to be reached, so that the actual current is directly further increased to the value of the actuating current.
- the electromagnetic actuator can be pre-energized with a defined (pre-)current that corresponds to an actuation force that is still below the static friction limit of the actuation unit and thus does not result in premature and unwanted closing the clutch.
- the actuator is then regulated to the maximum control current, the actuation current, to close the clutch. Because the maximum control current, i.e. the actuation current, no longer builds up from zero amperes, but from the value of the bias current, which is greater than zero amperes, the time it takes for the current to build up is reduced, which leads to a shorter switching time when closing the clutch leads. If, in known clutch units, the time between the initiation of the actuating current (at a second point in time) and the reaching of the end position of the piston or the first clutch component (at a third point in time) is between 85 and 115 milliseconds (i.e.
- the bias current is at least 20% of the actuating current, in particular at least 25% of the actuating current.
- the bias current is at most 50% of the actuating current, preferably at most 35% of the actuating current.
- a value of the bias current is kept constant until step e) is initiated. Constant means in particular that the value of the bias current in this time after initiating step b) and/or after reaching the predetermined value of the bias current and until initiating step e) by a maximum of 10%, preferably by a maximum 5%, varies.
- the actuation current is at most 6 amperes, in particular at most 4 amperes, preferably at most 3.5 amperes.
- the preliminary current is set in such a way that a current at which the piston has moved in the context of preliminary tests is at least 5% higher, preferably at least 10% higher, particularly preferably at least 20% higher than the value of the currently set value or as part of step b) set bias current.
- the components whose static friction must be overcome by the actuating current or not overcome by the pre-current include at least the piston and at least one or all of the following components:
- a sensor disk which interacts with a position sensor to determine a position of the piston
- a return spring which, as an energy storage element, provides a force for moving the piston back from the end position back to the starting position
- the sliding disk is used in particular to space components that rotate at un ferent speeds. Friction of the components that contact one another (otherwise, ie without a sliding disk) is reduced via the sliding disk, so that a relative rotation of the components can take place with as little loss as possible.
- the piston makes contact in particular with the sensor disk and/or the first clutch component via the sliding disk.
- the sensor disc acts in particular with a stationary positioned sensor together, which is provided for detecting the position of the piston.
- the sensor disk is connected to the piston, the sliding disk and/or the first clutch component so that their displacement is transmitted to the sensor disk. The displacement of the sensor disk and thus the displacement of the piston or the first clutch component can be determined via the sensor.
- the return spring serves in particular to move the piston back into the starting position.
- the return spring acts in particular with the sen sor disc together and is based on a stationary component of the hitch be aggregate, z. B. the housing from.
- the restoring spring stores the work required for the displacement and returns it to the actuating unit after the actuation of the actuator has ended. This allows the piston to be moved back to its starting position.
- the cam ring is designed to form a form-fitting connection, in particular form-fitting in relation to the Elmfangsraum, with the second clutch component.
- the components mentioned, in particular also the sensor disk can move within a transmission fluid, in particular a liquid, or who is at least acted upon by it. If a transmission fluid is present, the movement of the components mentioned is inhibited even more, so that the pre-current has a higher value.
- the clutch unit has a sensor for determining the position of the piston.
- the sensor interacts in particular with the sensor disk.
- the system required for the execution of the method e.g. B. in the vehicle, is responsible, be executed "self-learning".
- the value of the bias current set according to step b) can be defined as a function of determined environmental conditions.
- a drive train of a vehicle at least having a transmission housing and a clutch unit arranged therein with a positively acting clutch and an actuation unit for actuating the clutch.
- the clutch comprises at least one first clutch component that can be displaced along an axial direction and a second clutch component that can be positively connected to one another when the clutch is actuated.
- the actuation unit includes an electromagnetic actuator with a piston. To actuate the clutch and to shift the first clutch component, the piston can be shifted from an off starting position to an end position or is shifted when the clutch is actuated.
- the clutch components can only be positively connected to one another after a state of synchronization has been reached. At least the piston and the clutch can be at least partially acted upon by a transmission fluid.
- the drive train or the actuation unit comprises a system for data processing, e.g. B. a control unit that has means for executing the steps of the method and / or has means that are suitably equipped, configured or programmed for execution of the steps of the method.
- Torque is transmitted via the clutch components in particular only after a fully engaged state of the clutch components has been determined, for which the piston is arranged in the end position.
- a position of the piston can be determined via a sensor.
- a vehicle that has the drive train described and wheels that can be driven by it.
- At least one system for data processing which has means which initiate and control the method and which are equipped, configured or programmed to carry out the method.
- the funds include B. data lines or transmission devices that allow transmission of commands, measured values, data or the like between the listed elements.
- a computer program is also proposed, comprising instructions which, when the program is executed by a computer, cause the latter to carry out the method described or the steps of the method described.
- a computer-readable storage medium is also proposed, comprising instructions which, when executed by a computer, cause the latter to carry out the method described or the steps of the method described.
- the explanations regarding the method can be transferred in particular to the drive train, the vehicle, the system for data processing and/or the computer-implemented method (ie the computer program and the computer-readable storage medium) and vice versa.
- first”, “second”, ...) primarily (only) serve to distinguish between several similar objects, sizes or processes, i.e. in particular no dependency and/or sequence of these objects , sizes or processes to each other. Should a dependency and/or order be necessary, this is explicitly stated here or it is obvious to the person skilled in the art when studying the specifically described embodiment. If a component can occur more than once (“at least one”), the description of one of these components can apply equally to all or part of the majority of these components, but this is not mandatory.
- Fig. 1 a partial view of a drive train in a side view in section
- Fig. 2 a diagram with several curves.
- Fig. 1 shows a partial view of a drive train 1 in a side view in section.
- the drive train 1 is part of a vehicle 2.
- the drive train 1 comprises a transmission housing 3 and a clutch unit 4 arranged therein with a positively acting clutch 5 and an actuating unit 6 for actuating the clutch 5.
- the clutch 5 comprises a displaceable along an axial direction 7 first clutch component 8 and a second clutch component 9 which can be positively connected to one another when the clutch 5 is actuated.
- the actuation unit 6 includes an electromagnetic actuator 10 with a piston 11.
- the drive train 1 or the actuation unit 6 includes a system 32 for data processing.
- the piston 11 can be displaced from an initial position 12 into an end position 13 for actuating the clutch 5 and for displacing the first clutch component 8 or is displaced when the clutch 5 is actuated.
- the hitch be components 8, 9 are positively connected to each other only after reaching a state of synchronization. At least the piston 11 and the hitch 5 are at least partially acted upon by a transmission fluid 14 .
- the system 32 includes means for carrying out the method described are suitably designed and set up or with which the procedure is carried out.
- the actuator 10 includes a coil 23 to which an electrical actuation current 17 is applied in order to displace the piston 11 .
- the sliding disk 18 is displaced by the piston 11 and the sensor disk 19 via the sliding disk 18 .
- the position sensor 21 detects the position 20 of the sensor disk 19 and thus of the piston 11.
- the sliding disk 18 is used to space components that rotate at different speeds. Friction of the components that contact one another (otherwise, ie without a sliding disk) is reduced via the sliding disk 18, so that a relative rotation of the components can take place with as little loss as possible.
- the piston 11 contacts the sensor disk 19 via the sliding disk 18.
- the sensor disk 19 interacts with the stationary positioned position sensor 21, which is provided for detecting the position 20 of the piston 11.
- the sensor disk 19 is connected to the piston 11, the sliding disk 18 and the first hitch be component 8, so that their displacement is transmitted to the sensor disk 19.
- the displacement of the sensor disc 19 and thus the displacement of the piston 11 and the first hitch be component 8 can be determined.
- the return spring 22 is used to return the piston 11 back to the starting position 12.
- the return spring 22 acts together with the sensor disc 19 and is supported on a stationary component of the Kupplungsaggre gats 4, z. B. the gear housing 3 from.
- the restoring spring 22 stores the work required for the displacement and transmits this to the actuating unit 6 after the actuation of the actuator 10 has ended return. The piston 11 can thus be moved back into the starting position 12 .
- the cam ring is designed to form a form-fitting connection, in particular a form-fitting connection with respect to the circumferential direction 33, with the second clutch component 9.
- the second clutch component 9 is non-rotatably connected to the axle 38 of the differential gears 39 of the differential.
- the Be tenkegelzier 42 of the differential are rotatably connected to the wheels of the vehicle 2.
- the differential gear 39 is rotatably mounted on the axle 38 and connected to the side bevel gears 42 .
- the differential cover 40 and the gear 41 connecting the differential via the transmission to the drive unit are non-rotatably connected to one another.
- the first clutch component 8 is connected to the differential cover 40 in a torque-proof manner.
- the gear wheel 41 is connected to the axle 38 in a rotationally fixed manner via the clutch components 8 , 9 .
- 2 shows a diagram with a number of curves 25, 26, 27, 28, 29, 30, 31.
- a rotational speed 16, a position 20 and a current 15, 17 are plotted on the vertical axis.
- Time 34 is plotted on the horizontal axis.
- the method begins at a first point in time 24 with step a).
- a request for actuation of the clutch 5 is determined by the system 32.
- the system 32 of the actuation unit 6 then initiates the further steps of the method.
- the request to actuate the clutch 5 is aimed at producing the form-fitting connection of the clutch components 8, 9 with one another.
- the first profile 25 shows the profile of the electrical target current when no bias current 15 is to be set. It can be seen that a synchronization of the speeds 16 is awaited, see fifth curve 29 , before the setpoint current is increased from the value zero to the value of the actuator current 17 at the second point in time 35 .
- the second profile 26 shows the profile of the actual electric current, which follows the theoretically required target current in time and is actually applied to the clutch unit 4 .
- the sixth course 30 shows the course of the position 20 of the first Kupplungskom component 8 when no pre-current 15 is set.
- the first clutch component 8 is actuated by the piston 11 which moves along the axial direction 7 between an initial position 12 and an end position 13 and transmits this movement to the first clutch component 8 .
- the first clutch component 8 or the piston 11 reaches its end position 13 along the axial direction 7.
- the third course 27 shows the course of the electrical setpoint current when a bias current 15 is set.
- the fourth profile 28 shows the profile of the actual electrical current that follows the theoretically required target current according to the third profile 27 and is actually impressed in the clutch unit 4 .
- step b) is initiated immediately after the first point in time 24 .
- the actuator 10 is energized with a preliminary current 15 through the system 32 , the piston 11 remaining in the initial position 12 . So it is not a neces sary to move the piston 11 electric current, z. B. the actuation current 17 adjusted. Before the current 15 is as large as possible, but with a movement of the piston 11 should not take place.
- the piston 11 is held back in the starting position 12 by the resistances present in the clutch assembly 4 or in the actuating unit 6 .
- step c) synchronization of the speeds 16 of the clutch components 8, 9 is initiated, see fifth curve 29.
- Step c) occurs as a result of the determination of a request to actuate the clutch 5 according to step a), i.e. also immediately after the first point in time 24.
- the speeds 16 of the clutch components 8, 9 are synchronized with one another as quickly as possible. It is shown here that a speed 16 of a clutch component 8, 9 is increased until a (constant) speed 16 of the other clutch component 9, 8 is reached at the second point in time 35.
- step d) the system 32 determines that the synchronization status has been reached by the clutch components 8, 9.
- the speeds 16 of the clutch components 8, 9 must be the same to such an extent that a coupling of the clutch components 8, 9 is possible. presented here by the transition of the fifth course 29 towards a constant speed 16 at the second point in time 35.
- step e) If a synchronization state is reached, according to step e) at the second point in time 35, the actuator 10 is energized with an actuating current 17 (see third curve 27 and fourth curve 28 following the third curve 27 in time), with the piston 11 moving from the starting position 12 to the End position 13 is shifted.
- the actuation current 17 is significantly greater than the previously present pre-flow 15.
- the resistances in the clutch unit 4 that are also present in step b) are overcome and the piston 11 is displaced along the axial direction 7 to actuate the clutch 5.
- the seventh course 31 shows the course of the position 20 of the first Kupplungskompo component 8 when a bias current 15 is set.
- the first clutch component 8 is actuated by the piston 11 which moves along the axial direction 7 between an initial position 12 and an end position 13 and transmits this movement to the first clutch component 8 .
- the first clutch component 8 or the piston 11 reaches its end position 13 along the axial direction 7.
- the end position 13 of the piston 11 or of the first clutch component 8 is now reached at a fourth point in time 37 which is well before the third point in time 36 .
- This can be attributed primarily to the actuation current 17, which occurs more quickly and which now has to be increased from the value of the bias current 15 to the value of the actuation current 17 and not from zero.
- the time saving that is possible with the proposed method is due to the distance between the fourth point in time 37 (end position 13 - detected by the position sensor 21 - is reached when actuator 10 is acted upon by pre-current 15) and the third point in time 36 (end position 13 is reached when Actuator 10 is acted upon directly by the actuating current 17 from a value of zero) can be seen.
- first curve target current without bias current
- second curve actual current without bias current
- Third curve set current with pre-current
- Fourth curve actual current with pre-current
- Fifth curve speed
- Sixth curve position of first clutch component without pre-flow
- Seventh curve position of first clutch component with pre-flow
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
Description
Claims
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Application Number | Priority Date | Filing Date | Title |
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CN202180100981.5A CN117716142A (zh) | 2021-05-31 | 2021-05-31 | 用于运行驱动系的方法以及驱动系 |
DE112021007741.4T DE112021007741A5 (de) | 2021-05-31 | 2021-05-31 | Verfahren zum Betrieb eines Antriebsstranges und Antriebsstrang |
PCT/EP2021/064538 WO2022253402A1 (de) | 2021-05-31 | 2021-05-31 | Verfahren zum betrieb eines antriebsstranges und antriebsstrang |
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PCT/EP2021/064538 WO2022253402A1 (de) | 2021-05-31 | 2021-05-31 | Verfahren zum betrieb eines antriebsstranges und antriebsstrang |
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DE (1) | DE112021007741A5 (de) |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009001191A2 (en) * | 2007-06-22 | 2008-12-31 | Toyota Jidosha Kabushiki Kaisha | Dog clutch |
DE102015113083A1 (de) * | 2015-08-07 | 2017-02-09 | Gkn Driveline International Gmbh | Verfahren zum Auslösen eines Prüfungsprozesses bei einem Kupplungsaggregat |
US20170198766A1 (en) * | 2016-01-13 | 2017-07-13 | Jtekt Corporation | Control method and control device for dog clutch |
WO2018157950A1 (de) | 2017-03-03 | 2018-09-07 | Gkn Automotive Ltd. | Verfahren und vorrichtung zum betrieb eines antriebsstranges |
-
2021
- 2021-05-31 DE DE112021007741.4T patent/DE112021007741A5/de active Pending
- 2021-05-31 WO PCT/EP2021/064538 patent/WO2022253402A1/de active Application Filing
- 2021-05-31 CN CN202180100981.5A patent/CN117716142A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009001191A2 (en) * | 2007-06-22 | 2008-12-31 | Toyota Jidosha Kabushiki Kaisha | Dog clutch |
DE102015113083A1 (de) * | 2015-08-07 | 2017-02-09 | Gkn Driveline International Gmbh | Verfahren zum Auslösen eines Prüfungsprozesses bei einem Kupplungsaggregat |
US20170198766A1 (en) * | 2016-01-13 | 2017-07-13 | Jtekt Corporation | Control method and control device for dog clutch |
WO2018157950A1 (de) | 2017-03-03 | 2018-09-07 | Gkn Automotive Ltd. | Verfahren und vorrichtung zum betrieb eines antriebsstranges |
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CN117716142A (zh) | 2024-03-15 |
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