DE102019213556A1 - Method and device for generating feedback for signaling that a switching element is ready to switch for a clutch system for a vehicle and switching system with a switching element and a device - Google Patents

Abstract

The present approach relates to a method for generating feedback for signaling that a switching element (115) for a clutch system (105) for a vehicle (100) is ready to switch. The method has a step of reading in and a step of outputting. In the reading-in step, a switching request signal (125) is read in, which represents an actuation of the switching element (115). In the output step, a feedback signal (130) is output using the shift request signal (125) when a clutch of the clutch system (105) is arranged in a certain state, the feedback signal (130) being designed to provide perceptible feedback for a To effect driver of the vehicle (100).

Description

The present approach relates to a method and a device for generating feedback for signaling that a shifting element is ready to be shifted for a clutch system for a vehicle and a shifting system with a shifting element and a device.

In a so-called “2-pedal clutch-by-wire” system, the clutch of a vehicle is opened or closed via a clutch actuator, regardless of a mechanical connection to a foot pedal. After signaling a shift request to the system, the driver can intuitively set a desired gear or gear, as with a classic manual transmission.

Against this background, the present approach creates an improved method and an improved device for generating feedback for signaling that a switching element for a clutch system for a vehicle is ready to switch and an improved switching system with a switching element and a device according to the main claims. Advantageous refinements result from the subclaims and the following description.

The advantages that can be achieved with the approach presented are that a method is created in which a driver of a vehicle is signaled that a shift element is actually ready to shift after a shift request has been made. This is important because a certain time elapses after a signaling of the shift request until the clutch of a clutch system is in an open state. During this time, manual shifting by the driver would be uncomfortable or even harmful for the clutch system.

A method for generating feedback for signaling that a switching element for a clutch system for a vehicle is ready to switch has a reading-in step and an outputting step. In the reading-in step, a shift request signal is read in, which represents a shift request actuation of the shift element. In the output step, a feedback signal is output using the shift request signal when a clutch of the clutch system is arranged in a certain state, the feedback signal being designed to bring about perceptible feedback for a driver of the vehicle.

This method can be implemented, for example, in software or hardware or in a mixed form of software and hardware, for example in a control device.

The clutch system can be an electromechanical clutch system, for example a so-called “2-pedal clutch-by-wire” system, in which the clutch is opened and / or closed via a clutch actuator and one or more drive steps or gears can be adjusted manually by the driver. The switching element is designed for the driver to manually set the gear steps. The shift request signal can represent a shift request actuation of the shift element caused by the driver to signal the shift request. For example, the shift request signal can be triggered by a shift request actuation of the switching element provided specifically for this purpose. A shift request actuation can be understood, for example, as a manual actuation of a switch by a vehicle occupant, by means of which it can be signaled that there is a shift request, for example a request to change a gear in a transmission. The shift request signal can reduce a drive train torque of the clutch system and additionally or alternatively cause the clutch to be opened. In the output step, the feedback signal can be output using the shift request signal when the clutch of the clutch system is arranged in the specific state, which can be a state for changing gears, for example an open state of the clutch. By means of a method presented here, the feedback signal can advantageously signal to a driver that the clutch is now arranged, for example, in an open state in which manual setting of a gear is safely possible. After the driver has signaled the shift request, the driver can only wait until he perceives the feedback signal and can then shift.

In the reading-in step, the switching request signal can be read, which represents a specific force on the switching element and, additionally or alternatively, movement of the switching element. This can be a force on the switching element that can be brought about by the driver of the vehicle and additionally or alternatively movement of the switching element, which can be predetermined or specified specifically for this purpose and can be known to the driver, this force and additionally or alternatively movement the switching request signal is triggered. For example, it can be a lower force on the switching element than for a switching process and, additionally or alternatively, a tilting or nipping movement of the switching element. This allows for an easy Possibility to signal a shift request to the driver.

It is also advantageous if, according to one embodiment, in the output step, the feedback signal is output which is designed to bring about a haptic feedback, in particular a vibration, of the switching element. Such a haptic feedback can be easily and unmistakably recognized by the driver.

Additionally or alternatively, in the step of outputting, the feedback signal can be output which is designed to bring about a change in a switching characteristic of the switching element. For example, in the step of outputting, the feedback signal can be output which is designed to effect setting and / or changing of a force-displacement characteristic of the switching element in order to effect changing of the switching characteristic. According to an advantageous embodiment, the feedback signal is output in the output step, for example, which is designed to bring about a switch from a first force-displacement characteristic to a second force-displacement characteristic of the switching element, in which the switching element is subjected to the same force according to the second force-displacement characteristic, covers a greater deflection distance than in the case of the first force-displacement characteristic. Since it is to be expected that the driver exerts a constant force on the switching element while waiting for the feedback signal, for example in the direction of an intended switching movement, the driver advantageously feels a change in the actuation path in response to the feedback signal so that the switching element jerks executes the corresponding direction. The readiness of the switching element to be switched can also be quickly and easily recognized by the driver through such feedback that can be perceived by the driver.

The approach presented here also creates a device which is designed to carry out, control or implement the steps of a variant of a method presented here in corresponding devices. This embodiment variant of the approach in the form of a device can also solve the problem on which the approach is based quickly and efficiently.

A device can be an electrical device that processes electrical signals, for example sensor signals, and outputs control signals as a function thereof. The device can have one or more suitable interfaces, which can be designed in terms of hardware and / or software. In the case of a hardware design, the interfaces can, for example, be part of an integrated circuit in which functions of the device are implemented. The interfaces can also be separate, integrated circuits or at least partially consist of discrete components. In the case of a software-based design, the interfaces can be software modules that are present, for example, on a microcontroller alongside other software modules.

Also of advantage is a computer program product with program code that can be stored on a machine-readable carrier such as a semiconductor memory, a hard disk memory or an optical memory and is used to carry out the method according to one of the embodiments described above, when the program is on a computer or a device is performed.

A switching system with a switching element and the device described above is presented. The switching element of the switching system can have a lever element and a grip element for actuation by the driver, wherein the grip element can be coupled to the lever element in a nippable manner via a joint, in particular wherein the device can be designed to read in the switching request signal which indicates a specific tilt or represents nip position of the grip element on the lever element. It is advantageous here if the switching system has at least one button which is arranged and additionally or alternatively designed to sense the tilt or tilt position of the handle element and provide the switching request signal in response to the tilt or tilt position. The button can be designed, for example, to mechanically sense the tilt or tilt position of the handle element. Such a switching element creates a simple possibility for the driver to signal his switching request by tilting or nipping the handle element, the lever element itself not being moved.

Alternatively, the switching element of the switching system can also have a lever element and a handle element coupled to the lever element for actuation by the driver, wherein the lever element can be designed to be bendable, in particular wherein the device can be designed to read in the switching request signal that indicates a specific bending position of the lever element represents.

• 1 eine schematische Querschnittsdarstellung eines Fahrzeugs mit einem Kupplungssystem mit einem Schaltsystem mit einem Schaltelement und einer Vorrichtung zum Erzeugen einer Rückmeldung zum Signalisieren einer Schaltbereitschaft des Schaltelements gemäß einem Ausführungsbeispiel;
• 2 eine schematische Querschnittsdarstellung eines Schaltsystems gemäß einem Ausführungsbeispiel;
• 3 eine schematische Querschnittsdarstellung eines Schaltsystems gemäß einem Ausführungsbeispiel;
• 4 ein Schaubild eines Schaltablaufs eines Kupplungssystems gemäß einem Ausführungsbeispiel;
• 5 ein Schaubild einer Schaltcharakteristik eines Schaltelements eines Schaltsystems gemäß einem Ausführungsbeispiel gemäß einem Ausführungsbeispiel;
• 6 ein Ablaufdiagramm eines Verfahrens zum Erzeugen einer Rückmeldung zum Signalisieren einer Schaltbereitschaft eines Schaltelements für ein Kupplungssystem für ein Fahrzeug gemäß einem Ausführungsbeispiel; und
• 7 ein Blockschaltbild eines Schaltungsablaufs eines Kupplungssystems gemäß einem Ausführungsbeispiel.

Embodiments of the approach presented here are shown in the drawings and explained in more detail in the description below. It shows:

• 1 a schematic cross-sectional view of a vehicle with a clutch system with a switching system with a switching element and a device for generating feedback for signaling that the switching element is ready to be switched according to an exemplary embodiment;
• 2 a schematic cross-sectional illustration of a switching system according to an embodiment;
• 3 a schematic cross-sectional illustration of a switching system according to an embodiment;
• 4th a diagram of a shift sequence of a clutch system according to an embodiment;
• 5 a diagram of a switching characteristic of a switching element of a switching system according to an embodiment according to an embodiment;
• 6th a flowchart of a method for generating a feedback for signaling a switching readiness of a switching element for a clutch system for a vehicle according to an embodiment; and
• 7th a block diagram of a circuit sequence of a clutch system according to an embodiment.

In the following description of preferred exemplary embodiments of the present approach, the same or similar reference numerals are used for the elements shown in the various figures and having a similar effect, a repeated description of these elements being dispensed with.

If an exemplary embodiment comprises an “and / or” link between a first feature and a second feature, this is to be read in such a way that the exemplary embodiment according to one embodiment has both the first feature and the second feature and, according to a further embodiment, either only the has the first feature or only the second feature.

1 shows a schematic cross-sectional representation of a vehicle 100 with a coupling system 105 with a switching system 110 with a switching element 115 and a device 120 for generating a feedback for signaling that the switching element is ready to switch 115 according to an embodiment.

The coupling system is only an example 105 arranged on or in the vehicle. With the coupling system 105 According to this exemplary embodiment, it is an electromechanical clutch system 105 , in which a coupling of the coupling system 105 is opened and / or closed via a clutch actuator and one or more different drive steps or gears manually by actuating the switching element 115 are adjustable. The coupling system 105 can also be referred to as a so-called “2-pedal clutch-by-wire” system. According to this exemplary embodiment, the clutch actuator is activated by a shift request of the shift element 115 enableable.

According to this embodiment, the switching system 110 Part of the coupling system 105 . The switching system 110 has the switching element 115 and the device 120 on. The switching element 115 is designed for manual operation by a driver of the vehicle. The device 120 is designed to provide feedback for signaling that the switching element is ready to switch 115 to create.

The device is for this purpose 120 designed to provide a shift request signal 125 read in that the switching request actuation of the switching element 115 represents. Using the switching request signal 125 is the device 120 designed to provide a feedback signal 130 issued when the clutch of the clutch system 105 is placed in a certain state, the feedback signal 130 is designed to provide perceptible feedback for the driver of the vehicle 100 to effect.

According to this embodiment, the device 120 a reading device 135 on, which is designed to the switching request signal 125 read in and / or an output device 140 on, which is designed to the feedback signal 130 to spend.

According to this exemplary embodiment, the output device is 140 designed to receive the feedback signal 130 using the switching request signal 125 output when the state of the clutch of the clutch system 105 was recognized as a ready-to-switch state, according to this exemplary embodiment an open state of the clutch. According to this embodiment, the device 120 a detection device for this purpose 145 which is designed to detect the open state of the clutch and to output a detection signal in response to the detection of the open state, the output device 140 the feedback signal 130 according to this embodiment using the detection signal. According to one embodiment, the device is 120 additionally or alternatively designed to the Detection signal from an external to the device 120 read in the arranged device.

According to this exemplary embodiment, the reading device is 135 designed to receive the shift request signal 125 read in that a certain force on the switching element 115 and / or movement of the switching element 115 represents. According to one exemplary embodiment, the force determined is a force compared to a manual switching process with the switching element 115 less force on the switching element 115 and / or during the movement by a tilting or nipping movement of the switching element 115 .

According to this exemplary embodiment, the output device is 140 designed to receive the feedback signal 130 output which is designed to provide a haptic feedback, in particular a vibration, of the switching element 115 and / or changing a switching characteristic of the switching element 115 to effect. The feedback tells the driver that he can now shift. According to this exemplary embodiment, the feedback is provided by vibration. The switching element 115 has for this purpose, according to this exemplary embodiment, a vibration actuator which is designed to generate the feedback signal 130 to be received and in response to the feedback signal 130 to vibrate. According to this exemplary embodiment, at least one vibration element of the vibration actuator is briefly activated as soon as the system is ready for the circuit.

An optional or additional principle of a changed switching characteristic of the switching element to the vibration 115 in response to the feedback signal 130 is in 5 explained in more detail.

2 shows a schematic cross-sectional representation of a switching system 110 according to an embodiment. This can be the in 1 switching system described 110 act.

The switching element 115 of the switching system 110 has a lever element according to this embodiment 200 and a handle element 205 on, the handle element 205 about a joint 210 nippable on the lever element 200 is coupled. According to this exemplary embodiment, the grip element 205 Operating aids in the form of stops 212 on. According to this embodiment, the device 120 designed to receive the shift request signal 125 to read in a specific tilt or nip position 215 , 200 of the handle element 205 on the lever element 200 represents. To this end, the switching element 115 according to this embodiment, at least one button 225 , 230 on which is arranged and / or designed to the tilt or nip position 215 , 200 to sense and respond to the tilt or nip position 215 , 200 the switching request signal 125 to provide or send out. According to this exemplary embodiment, the switching element 115 two of the buttons 225 , 230 on, one of which is the first button 225 is arranged and / or designed to have a first nip position 215 to be sensed mechanically when the handle element 205 is arranged in a forward actuated position. A second button 230 is arranged and / or designed according to this embodiment to a second nip position 220 to be sensed mechanically when the handle element 205 is arranged in a rearward actuated position. According to one embodiment, at least one of the buttons 225 , 230 the vibration actuator.

3 shows a schematic cross-sectional representation of a switching system 110 according to an embodiment. This can be the in 1 switching system described 110 act.

The switching element 115 of the switching system 110 has a lever element according to this embodiment 200 and one with the lever element 200 coupled handle element 205 on, the lever element 200 is formed bendable. The device 120 is designed according to this embodiment to the switching request signal 125 to read that a certain bending position 300 , 305 of the lever element 200 represents. According to this embodiment, the device 120 designed to receive the shift request signal 125 read in when the switching element 115 a first bending position 300 having a forward actuated position of the switching element 115 represents and / or if the switching element 115 a second bending position 305 having a rearward actuated position of the switching element 115 represents.

4th shows a graph 400 a shift sequence of a clutch system according to an embodiment. This can be the in 1 act described clutch system. In the diagram 400 is an operating force F. depending on a time t shown. According to this exemplary embodiment, the device is designed to generate the switching request signal 125 read in, which represents a certain force on the switching element.

A first point 405 indicates the beginning of the shift sequence, which can also be referred to as a shift. According to this exemplary embodiment, the switching sequence begins by a movement on and / or exerting a force on the switching element. A first line indicates the specific force 410 , which is sufficient to trigger the shift request recognition, according to this embodiment, the shift request signal 125 issued. A second point 415 indicates the beginning of a gear change. A second line marks another force 420 which is sufficient to make the gear change. According to this exemplary embodiment, the further force is 420 to change gears is greater than the specified force 410 to trigger the switching request recognition. According to one embodiment, the further force is 420 within a tolerance range of 20 percent deviation twice as large as the determined force 410 . A third point 425 indicates an end of the circuit.

The following is the graph 400 Described again in other words: After a shift request has been recognized, a drive train torque of the clutch system is reduced and the clutch is opened. A certain amount of time is required for this. If a shifting movement takes place so quickly that the gear would be disengaged before the clutch is opened and / or the drive train torque has been reduced, the gear cannot be engaged / disengaged or is torn out or synchronized against the drive train torque. This would be uncomfortable for the driver and material stress. One goal of the approach presented here is therefore that the driver waits to start a gear change until the drive train torque is reduced and the clutch is disengaged. The driver should therefore initially only use the specific force 410 act on the switching element, which is necessary to trigger the detection of the switching request. Only when the vehicle is ready to change gears should the driver apply the force necessary to change gears. Advantageously, thanks to the in 1 The device presented now provides feedback to the driver in the shift sequence as soon as the system is ready for the gear change. According to this embodiment, the feedback signal is before the point 415 issued. A block diagram of this shifting sequence is shown in FIG 7th described.

5 shows a graph 500 a switching characteristic of a switching element of a switching system according to an embodiment. This can be one of the switching elements described in one of the preceding figures. In the diagram 500 is a covered actuation path s of the switching element as a function of an actuating force F. shown on the switching element. A middle of the actuation path s indicates a middle position 502 of the switching element in which no force acts on the switching element. Two endpoints on the actuation path s each mark an end stop 503 of the switching element. Between the middle position 502 and each of the two end stops 503 is an actuation threshold in each case 504 arranged.

According to this exemplary embodiment, the output device of the device is designed to output the feedback signal, which is designed to bring about the change in the switching characteristic of the switching element.

According to this exemplary embodiment, the output device is designed to output the feedback signal, which is designed to set or change a force-displacement characteristic 505 , 510 of the switching element to effect the changing of the switching characteristic. According to this exemplary embodiment, the output device is designed to output the feedback signal, which is designed to switch from a first force-displacement characteristic 505 to a second force-displacement curve 510 of the switching element, in which the switching element covers a greater deflection path with the same force applied than in the case of the first force-path characteristic 505 .

According to this exemplary embodiment, the feedback to the driver is implemented by actively changing the switching characteristic or button characteristic. According to this exemplary embodiment, the actuation force / path profile of the shift request recognition is designed in such a way that it actively responds to the second characteristic curve 510 is switched over as soon as the detection signal is read. 5 In other words, shows a “button feedback of an actuation force”. If the clutch system is ready to be shifted by the driver, the switchover takes place from the first characteristic curve 505 on the second characteristic 510 . Since the driver exerts a force on the switching element in this situation, the actuation path changes with the switchover, so that the driver perceives a jolt in the switching element that goes in the same direction as the further switching movement. The feedback tells the driver that he can now shift. The switching element can also be referred to as a switching lever.

6th shows a flow chart of a method 600 for generating feedback for signaling that a switching element is ready to switch for a clutch system for a vehicle according to an exemplary embodiment. This can be a process 600 act, which can be executed and / or controlled by the device described in one of the preceding figures.

The procedure 600 has a step 605 of reading and one step 610 of spending on. In step 605 After reading in, a shift request signal is read in, which represents a shift request actuation of the shift element. In step 610 of outputting, a feedback signal is output using the shift request signal when a clutch of the clutch system is arranged in a certain state, wherein the feedback signal is designed to bring about a perceptible feedback for a driver of the vehicle.

Optionally, the procedure 600 according to this embodiment also a step 615 of the recognition, in which a recognition signal is read which represents an open state of the clutch, wherein the step 610 of outputting is carried out using the detection signal.

7th shows a block diagram of a circuit sequence 700 of a clutch system according to an embodiment. This can be one of the in one of the 1 or 4th act described clutch systems.

A first block 705 indicates a journey of the vehicle with a closed drive train. In a second block 710 a drive train torque is reduced and the clutch is opened after the shift request recognition has been triggered; according to this exemplary embodiment, the clutch is activated in response to the shift request signal 125 open. When the clutch is disengaged, that is to say is arranged in an open state, it takes place in a third block 715 feedback to the driver. According to this exemplary embodiment, the feedback to the driver takes place in the form of the feedback signal 130 using the detection signal 720 . In a fourth block 725 a gear change takes place by applying the additional force suitable for shifting 420 on the switching element.

The exemplary embodiments described and shown in the figures are selected only as examples. Different exemplary embodiments can be combined with one another completely or with regard to individual features. An embodiment can also be supplemented by features of a further embodiment.

Furthermore, the method steps presented here can be repeated and carried out in a sequence other than that described.

List of reference symbols

F.

Actuation force

s

Actuation path

t

time

100

vehicle

105

Coupling system

110

Switching system

115

Switching element

120

contraption

125

Switching request signal

130

Feedback signal

135

Reading device

140

Output device

145

Detection device

200

Lever element

205

Handle element

210

joint

212

attack

215

first sipping position

220

second nip position

225

first button

230

second button

300

first bending position

305

second bending position

400

Diagram of a shift sequence

405

first point

410

certain force

415

second point

420

further strength

425

third point

500

Switching characteristic diagram

502

Middle position

503

End stop

504

Actuation threshold

505

first force-displacement curve

510

second force-displacement curve

600

Method for generating a feedback for signaling that a switching element for a clutch system for a vehicle is ready to switch

605

Reading step

610

Step of spending

615

Step of recognition

700

Block diagram of a circuit sequence of a clutch system

705

first block

710

second block

715

third block

720

Detection signal

725

fourth block

Claims (12)

Method (600) for generating feedback for signaling that a switching element (115) for a clutch system (105) for a vehicle (100) is ready to switch, the method (600) comprising the following steps: Reading in (605) a shift request signal (125) which represents a shift request actuation of the switching element (115); and Outputting (610) a feedback signal (130) using the shift request signal (125) when a clutch of the clutch system (105) is arranged in a certain state, the feedback signal (130) being designed to provide perceptible feedback for a driver of the To effect vehicle (100). Method (600) according to claim 1, in which in the step (605) of reading in the switching request signal (125) is read in, which represents a certain force (410) on the switching element (115) and / or movement of the switching element (115). Method (600) according to one of the preceding claims, in which in the step (610) of outputting the feedback signal (130) is output which is designed to bring about haptic feedback, in particular vibration, of the switching element (115). Method (600) according to one of the preceding claims, in which, in the step (610) of outputting, the feedback signal (130) is output which is designed to bring about a change in a switching characteristic of the switching element (115). Method (600) according to Claim 4 , in which in the step (610) of outputting the feedback signal (130) is outputted, which is designed to bring about a setting and / or changing of a force-displacement characteristic (505, 510) of the switching element (115) in order to to change the switching characteristics. Method (600) according to Claim 5 , in which, in step (610) of outputting, the feedback signal (130) is output which is designed to switch from a first force-displacement characteristic (505) to a second force-displacement characteristic (510) of the switching element (115), in which the switching element (115) covers a greater deflection path with the same force applied according to the second force-displacement characteristic curve (510) than in the case of the first force-displacement characteristic curve (505). Device (120) which is set up to execute and / or control steps of the method (600) according to one of the preceding claims in corresponding units (135, 140, 145). Computer program which is set up to carry out the method (600) according to one of the Claims 1 to 6th execute and / or control. Switching system (110) with a switching element (115) and a device (120) according to Claim 7 . Switching system (110) according to Claim 9 , in which the switching element (115) has a lever element (200) and a grip element (205), wherein the grip element (205) is coupled to the lever element (200) via a hinge (210) so that it can be nipped, in particular wherein the device (120) is designed to read in the switching request signal (125), which represents a specific tilt or tilt position (215, 220) of the grip element (205) on the lever element (200). Switching system (110) according to Claim 10 , with at least one button (225, 230) which is arranged and / or designed to sense the tilting or nipping position (215, 220) of the handle element (205) and in response to the tilting or nipping position (215, 220 ) to provide the shift request signal (125). Switching system (110) according to Claim 9 , in which the switching element (115) has a lever element (200) and a grip element (205) coupled to the lever element (200), the lever element (200) being designed to be bendable, in particular the device (120) being designed to read in the switching request signal (125), which represents a specific bending position (300, 305) of the lever element (200).

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