EP4259510A1 - Elektrisch verstellbare lenksäule mit sicherheitsschaltung und ein verfahren zum betreiben einer elektrisch verstellbaren lenksäule - Google Patents
Elektrisch verstellbare lenksäule mit sicherheitsschaltung und ein verfahren zum betreiben einer elektrisch verstellbaren lenksäuleInfo
- Publication number
- EP4259510A1 EP4259510A1 EP21835655.8A EP21835655A EP4259510A1 EP 4259510 A1 EP4259510 A1 EP 4259510A1 EP 21835655 A EP21835655 A EP 21835655A EP 4259510 A1 EP4259510 A1 EP 4259510A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- unit
- steering column
- control unit
- electric motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/183—Steering columns yieldable or adjustable, e.g. tiltable adjustable between in-use and out-of-use positions, e.g. to improve access
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/181—Steering columns yieldable or adjustable, e.g. tiltable with power actuated adjustment, e.g. with position memory
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- 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
- B60W60/00—Drive control systems specially adapted for autonomous road vehicles
- B60W60/005—Handover processes
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0808—Diagnosing performance data
Definitions
- the invention relates to an electrically adjustable steering column for a motor vehicle with an adjustment unit on which a steering handle can be arranged, with a support unit by which the adjustment unit is held adjustably, with an adjustment device which is designed to adjust the adjustment unit in relation to the support unit and which, for Adjusting the actuating unit includes at least one electric motor, and with a control unit, wherein the control unit is designed to control the at least one electric motor.
- the invention also relates to a method for operating a steering column, a control unit of the steering column controlling at least one electric motor of the adjustment device to adjust an actuating unit from a stowed position to an operating position by means of an adjustment device of the steering column.
- An electrically adjustable steering column which is designed to be adjusted between a stowed position and an operating position, is known from publication DE 10 2019 108 466 A1.
- a motor vehicle In the operating position, which corresponds to an extended position within an adjustment range, a motor vehicle can be controlled in a manual driving mode by a driver.
- a stowed position which corresponds to a retracted position within an adjustment range, a motor vehicle can be controlled autonomously without control intervention by a driver in an autonomous driving mode.
- a position of the actuating unit of the steering column is determined relative to the support unit. The determined position is particularly taken into account when triggering motor vehicle restraint systems such as airbags.
- an adjustable steering column is known from the publication DE 10 2019 120 543 A1, in which the setting positions of the setting unit are detected. The detected adjustment positions are then evaluated in such a way that an adjustment takes place in a respective position within the framework of permitted adjustment specifications.
- the proposed solution provides an electrically adjustable steering column for a motor vehicle, the steering column having an actuating unit on which a steering handle, in particular a steering wheel, can be arranged, a support unit by which the actuating unit is held adjustably, an adjustment device and a control unit.
- the adjusting device is designed to adjust the adjusting unit relative to the support unit and comprises at least one electric motor for adjusting the adjusting unit.
- the control unit of the steering column is designed to control the at least one electric motor of the adjusting device and to generate a first signal and a second signal for controlling the at least one electric motor. Activation of the electric motor requires the first signal and the second signal to be present.
- the at least one electric motor is not actuated if only one of the signals is present, for example only the first signal or only the second signal.
- This advantageously creates a redundancy that prevents the at least one electric motor from being actuated unintentionally if one of the signals is applied unintentionally, and thus an unintentional adjustment of the setting unit.
- Such an unwanted presence of a signal could be caused, for example, by a hardware error, in particular by a hardware error in the power electronics of the steering column, more particularly by a hardware error in the inverter of the steering column.
- a permanently conductive MOSFET MOSFET: metal-oxide-semiconductor field-effect transistor
- the present invention advantageously prevents such an unintentional energization in that at least one further signal must be present so that the at least one electric motor can be energized.
- the first signal is a different signal from the second signal.
- the first signal and the second signal are two of each other independent signals.
- at least the first signal is generated independently of the second signal, or that at least the second signal is generated independently of the first signal.
- the first signal and/or the second signal are preferably electrical signals.
- the control unit has a logic unit.
- the logic unit is designed to generate the first signal and the second signal.
- the logic unit is designed to generate the first signal independently of the second signal.
- the logic unit is designed in such a way that a condition that can lead to the generation of the first signal and to the generation of the second signal is checked separately for the generation of the first signal and for the generation of the second signal.
- a corresponding logic module is advantageously present redundantly.
- a further particularly advantageous embodiment provides that the at least one electric motor is connected in a series circuit, the at least one electric motor being electrically conductively connectable in series with a voltage source via the series circuit.
- the at least one electric motor is electrically conductively connected to a voltage source of the motor vehicle, in particular to a voltage source of the on-board power supply system.
- the control unit of the steering column also advantageously includes a first switching unit and a second switching unit. It is advantageously provided that the first switching unit is switched by the presence of the first signal and the second switching unit is switched by the presence of the second signal. This means that the first switching unit is designed to switch in particular when the first signal is present at this first switching unit, and the second switching unit is designed in particular to switch when the second signal is present at this second switching unit. In the position of the switching units, which results from the presence of the first signal and the presence of the second signal, activation of the at least one electric motor is advantageously made possible. In particular, it is provided that the logic unit is designed to control the first switching unit independently of the second switching unit.
- the first switching unit and the second switching unit are connected in series with the at least one electric motor. It is therefore provided in particular that the at least one electric motor can only be supplied with current when the first switching unit and the second switching unit are each in a switching state in which they establish an electrically conductive connection between a voltage source, in particular the on-board power supply system of a motor vehicle, and the at least make an electric motor.
- a voltage source in particular the on-board power supply system of a motor vehicle
- an unintentional closing of only one of the switching units does not lead to an unintentional energization of the at least one electric motor.
- the first switching unit includes an inverter.
- the first switching unit is an inverter.
- the inverter is advantageously designed to generate a motor control signal, in particular a motor control signal for the at least one electric motor, as a function of the first signal.
- the motor drive signal is a voltage that may vary in magnitude and/or frequency, particularly as a function of the first signal.
- the second switching unit includes a transistor, preferably a MOSFET.
- the second switching unit is a transistor, preferably a MOSFET.
- the second signal is in particular a switching voltage for switching the transistor.
- the second switching unit is advantageously open in terms of circuitry when the second signal is not present, and the second switching unit is closed in terms of circuitry when the second signal is present. This therefore means that an electrically conductive connection can only be established in this configuration if the second signal is present.
- the second switching unit comprises a self-locking MOSFET for this purpose.
- An advantageous embodiment variant of the invention thus provides a series connection of an inverter as the first switching unit, a MOSFET as the second switching unit and an electric motor, the inverter being controlled by means of a first signal and the MOSFET by means of the second signal. The electric motor can therefore only be activated if both signals are present.
- the second switching unit is closed when the second signal is present, ie is electrically conductive, and is open, ie is electrically non-conductive, when the second signal is not present.
- the control unit comprises a diagnostics unit, the diagnostics unit being designed to detect an error in relation to the activation of the at least one electric motor, the control unit being further designed to interrupt the generated second signal that is present if the diagnostics unit detects a Has detected errors in relation to the driving of at least one electric motor, and thus there is a deviation from normal operation.
- the second signal can in particular be voltage-free, and the second switching unit can be a normally on MOSFET. In this case, an interruption of the second signal means that a voltage is applied to the normally on MOSFET, so that this MOSFET blocks.
- control unit of the steering column is further designed to generate the second signal when a request signal for an adjustment of the actuator unit is received by the control unit and an enable signal is received from the control unit via an interface of the steering column is, wherein the enable signal is a signal generated by a driver of a motor vehicle or a motor vehicle.
- a request signal can be triggered in particular by actuating an operating element with which the steering column can be adjusted by a vehicle user.
- a request signal can also be triggered in particular if a driver wants to switch between a manual driving mode and an autonomous driving mode.
- a request signal can be triggered in particular if the motor vehicle has detected a specific condition that involves adjusting the steering column, for example adjustment to reduce the risk of injury in the event of an accident of the motor vehicle or adjustment to make it easier to get in or out a driver.
- the steering column includes an interface, in particular a first interface, for connecting the steering column to an on-board electrical system of a motor vehicle.
- this interface is advantageously used to connect the steering column to the on-board power supply system and in particular the proposed advantageous connection of the at least one electric motor Adjusting the steering column is particularly easy to implement.
- the steering column also advantageously includes an interface, in particular a second interface, for connecting the steering column to a central control unit of a motor vehicle. A transmission of signals between the control unit of the steering column and the central control unit of the motor vehicle is advantageously made possible via this interface.
- control unit is designed to control the at least one electric motor of the adjusting device of the steering column in such a way that the actuating unit of the steering column is moved from a stowed position to an operating position or from an operating position to a stowed position.
- the control unit is in particular further developed to receive a confirmation signal from a central control unit of the motor vehicle via an interface of the steering column, in particular via the second interface.
- the confirmation signal is advantageously sent by the central control unit of the motor vehicle when the motor vehicle is in autonomous driving mode or the motor vehicle is stationary.
- the method for operating a steering column which is also proposed to solve the objects on which the invention is based, provides in particular that the steering column is used as intended in a motor vehicle.
- the steering column is a steering column designed according to the invention, which has the above-mentioned features individually or in combination.
- the proposed method provides that a control unit of the steering column controls at least one electric motor of the adjustment device to adjust an adjustment unit by means of an adjustment device of the steering column, in particular to adjust an adjustment unit from a stowed position of the steering column into an operating position of the steering column.
- the control unit To control the at least one electric motor, the control unit generates a first signal and a second signal, the first signal being applied to a first switching unit and the second signal being applied to a second switching unit.
- the first switching unit and the second switching unit are preferably connected in series with the at least one electric motor.
- the at least one electric motor advantageously adjusts the actuating unit when the first signal is present at the first switching unit and the second signal is also present at the second switching unit. That is, the first signal and the second signal must in particular be present at the respective switching units at the same time, so that a respective electric motor of the adjustment device can be activated and the adjustment unit can thus be adjusted.
- the method further provides that an adjustment request is received by the control unit of the steering column, with the first signal being generated when the adjustment request is received.
- the control unit also receives an enable signal from a driver input or a motor vehicle controller, the second signal being generated when the enable signal is received.
- the adjustment request is sent by the central control unit of the motor vehicle when there is a transition from manual driving mode to autonomous driving mode, the adjustment request in this example providing in particular for adjusting the steering column from an operating position to a stowed position. So that the adjustment process from the operating position to the stowed position is actually carried out, the release signal must advantageously have been received and the second signal must be present.
- a driver is asked to confirm that the adjustment process is being carried out.
- the driver's confirmation is advantageously carried out by actuating an input element, with the control unit of the steering column receiving the enable signal and generating the second signal when the input element is actuated. If there is no confirmation from the driver, the setting unit is advantageously not adjusted.
- the central control unit of the motor vehicle in particular by evaluating at least one sensor signal, confirms that the transition from manual ferry mode to autonomous ferry mode has taken place, and when it has taken place Confirmation the release signal is generated. The receipt of the release signal then in turn leads to the control unit generating the second signal and the adjustment process being able to be carried out. If there is no confirmation, the control unit does not receive a release signal and an adjustment process is advantageously not carried out.
- FIG. 1 shows a simplified perspective view of an exemplary embodiment of a steering system with a steering column designed according to the invention
- 2 shows an exemplary embodiment of a steering column designed according to the invention in a simplified perspective view
- FIG. 3 shows the exemplary embodiment according to FIG. 2 in a further simplified perspective representation
- FIG. 4 shows a highly simplified schematic representation of an exemplary embodiment of an installed steering column designed according to the invention with a steering handle in a stowed position (FIG. 4a) and in an operating position (FIG. 4b);
- FIG. 5 shows a schematic representation of an exemplary embodiment of a control unit of a steering column designed according to the invention, which controls an electric motor connected to an on-board power supply system;
- FIG. 6 shows a schematic representation of a further exemplary embodiment of a control unit of a steering column designed according to the invention, which controls an electric motor connected to an on-board power supply system.
- the steering system 10 includes a steering column 1 with an actuating unit 2 on which a steering wheel is arranged as a steering handle 20 .
- the steering column 1 also includes a support unit 4, by which the actuating unit 2 is held in an adjustable manner.
- a rotation angle sensor (not shown) is attached to a steering shaft of the actuating unit 2 and detects a driver's steering torque applied by turning the steering handle 20 .
- a feedback actuator 25 is arranged on the steering shaft, which is used to transmit the reactions from the roadway 70 to the steering handle 20 and thus to give the driver feedback about the steering and driving behavior of the vehicle.
- the driver's steering request is transmitted via signal lines to a control unit, not explicitly shown in FIG. 1, via the angle of rotation of the steering shaft measured by the angle of rotation sensor.
- This control unit controls depending on the signal from the angle of rotation sensor and others Input variables, in particular the vehicle speed or the yaw rate, an electric steering actuator 26, also known as a steering actuator.
- the steering divider 26 controls the position of the steered wheels 27.
- the steering divider 26 causes an axial displacement of a toothed rack by means of a threaded drive 28.
- the steered wheels 27 are connected to the rack via tie rods 29 .
- FIGS. 2 and 3 An exemplary embodiment of a steering column 1 for such a steering system 10 is explained in more detail below with reference to FIGS. 2 and 3 .
- FIG. 2 shows an exemplary embodiment of a steering column 1 designed according to the invention in a schematic perspective view from the top left at an angle to the rear end, relative to the direction of travel of a vehicle (not shown), where a steering wheel (not shown here) is held in the operating area.
- Fig. 3 shows the steering column 1 in a view from the opposite side, that is seen from the top right.
- the steering column 1 comprises an actuating unit 2 , a steering handle being able to be arranged on a steering shaft 37 of the actuating unit 2 .
- the control unit 2 is held by a support unit 4 so that it can be adjusted.
- the steering column includes an adjusting device 7, which in this exemplary embodiment includes two adjusting units 5, 6, each with an electric motor 55, 65.
- the steering column 1 also includes a jacket unit 3 which has an outer jacket tube 31 , an intermediate jacket tube 32 and an inner jacket tube 33 .
- the jacket tubes 31, 32 and 33 are arranged axially, in the axial direction of a longitudinal axis L, coaxially telescopically adjustable, as indicated by a double arrow.
- a stop 34 is attached to the rear end of the outer jacket tube 31 and protrudes inwards at the open end into the space between the outer jacket tube 31 and the intermediate jacket tube 32 .
- the intermediate jacket tube 32 strikes axially against the stop 34 and is secured against separation from the outer jacket tube 31 .
- At the rear end of the intermediate jacket tube 32 there is a stop 35 which protrudes inward into the space between the intermediate jacket tube 32 and the inner jacket tube 33 and which secures the inner jacket tube 33 against being pulled out of the intermediate jacket tube 32 .
- a steering spindle 37 is mounted in the shell unit 3 so that it can rotate about the longitudinal axis L and has a connecting section 38 at its rear end for attaching a steering handle, which is not shown in FIGS. 2 and 3 .
- the steering spindle 37 is also designed to be telescopic in the longitudinal direction.
- the actuating unit 2 of the steering column 1 comprises the inner casing tube 33 together with the steering spindle 37 mounted therein.
- This actuating unit 2 is accommodated in the outer casing tube 31 so that it can be displaced telescopically in the direction of the longitudinal axis L in order to implement a longitudinal adjustment relative to the casing unit 3 in order to enable the steering handle to be connected to the steering spindle 37 to be able to be positioned back and forth in the longitudinal direction relative to the support unit 4, as indicated by the double arrow parallel to the longitudinal axis L.
- the shell unit 3 is held in a two-part support unit 4, which has fastening means 41 for attachment to a vehicle body, not shown.
- the casing unit 3 In its front region, the casing unit 3 is mounted such that it can be pivoted relative to the vehicle body about a horizontal pivot axis S, which is shown schematically and is transverse to the longitudinal axis L.
- a pivot bearing is arranged in the support unit 4 or between this support unit 4 and the vehicle body.
- the casing unit 3 In the rear area, the casing unit 3 is connected to the carrying unit 2 via an adjusting lever 42 .
- By rotating the adjusting lever 42 by means of the adjusting unit 6 of the adjusting device 7 of the steering column 1, as shown in FIG. be, whereby in particular an adjustment of an attachable to the attachment portion 38 steering handle can be made in the vertical direction H, which is indicated by the double arrow.
- the further adjustment unit 5 of the adjustment device 7 of the steering column 1 is designed, as shown in FIG.
- the further adjustment unit 5 has a spindle drive with a spindle nut 51 with an internal thread 74 extending along a spindle axis G, into which a threaded spindle 52 engages, i.e. with its external thread screwed into the corresponding internal thread 74 of the spindle nut 51.
- the threaded spindle axis of the threaded spindle 52 is identical to the spindle axis G and runs essentially parallel to the longitudinal axis L.
- the spindle nut 51 is rotatably mounted about the spindle axis G in a bearing housing 53 which is firmly connected to the outer jacket tube 31 of the jacket unit 4 . In the direction of the spindle axis G, the spindle nut 51 is supported axially on the casing unit 4 via the bearing housing 53 .
- the adjustment unit 5 is a so-called immersion spindle drive.
- the threaded spindle 52 is connected at its free end to an arm 36 in a rotationally fixed and axially fixed manner with the inner jacket tube 33, and the spindle nut 51 is supported axially, i.e. in the longitudinal direction, on the outer jacket tube 31 via the drive unit 53.
- the longitudinal direction corresponds to the direction of the longitudinal axis L.
- a relative rotation by means of the electric motor 55 of the adjusting device 7 moves the threaded spindle 52 and the spindle nut 51 together or apart, depending on the direction of rotation, as a result of which the inner casing tube 33 axially slides into the intermediate casing tube 32, and this into the Outer jacket tube 31 is retracted or extended, as indicated by the double arrow.
- a steering wheel that can be attached to the connection section 38 can be brought forward into a stowage position 200, as outlined in FIG. 4a, or into an operating position 204, 205, 206 in the operating area, as outlined in FIG. 4b.
- the inner jacket tube 33 and the intermediate jacket tube 32 are retracted into the outer jacket tube 31, i.e. sunk forward.
- the jacket tubes 31, 32 and 33 are extended telescopically apart.
- FIG. 3 which shows a perspective view of the steering column 1 from the side at the rear in FIG.
- this adjusting unit 6 has the same effect as the further adjusting unit 5 of the adjusting device 7 .
- the adjusting unit 6 also includes a spindle nut 61, in the internal thread of which a threaded spindle 62 engages along a spindle axis G.
- the threaded spindle 62 is rotatably mounted about the axis G in a bearing housing 63, which is attached to the jacket unit 3, and is supported axially, in the direction of the axis G, on the jacket unit 3, and by an electric motor 65 optionally in both directions of rotation about the axis G can be driven in rotation.
- the adjustment units 5, 6 of the steering column 1 are so-called immersion spindle drives in the illustrated embodiment.
- a rotary spindle drive can also be configured, in which the spindle nut 51 is held on the steering column 1 with respect to rotation and the threaded spindle 52 can be driven in rotation by the motor 55 .
- the adjustment unit 6 acts on the end of the two-armed adjusting lever 42 which is mounted on the support unit 4 so that it can rotate about a pivot bearing 43 and whose other arm is connected to the other end in a further pivot bearing 44 with the jacket unit 3 .
- the steering column 1 includes a control unit 8, which is only shown symbolically in FIG. 2 and FIG.
- the control unit 8 is connected to the electric motors 55, 65 via lines ZI, Z2, which are also shown only symbolically in FIG. 2 and FIG.
- the control unit 8 is designed to generate a first signal S1 and, independently of this, a second signal S2 for controlling the electric motors.
- the control unit 8 comprises a first switching unit 12 and a second switching unit 13, the first switching unit 12 being switched by the presence of the first signal S1 and the second switching unit 13 being switched by the presence of the second signal S2. Controlling the electric motors 55, 65 requires the first signal S1 to be present and the second signal S2 to be present. Further details on a possible configuration of the control unit 8 are explained with reference to FIGS. 5 and 6 .
- the steering column 1 also includes an interface 9, which is also shown only symbolically in FIGS. 2 and 3.
- the steering column can be connected to an on-board power supply system of a motor vehicle via the interface 9, in particular in order to provide the electrical energy required for adjusting the electric motors 55, 65.
- the steering column 1 can be connected to a central control unit of the motor vehicle via the interface 9 .
- the steering column control unit 8 can advantageously exchange data with the central control unit.
- the control unit 8 can be informed via the interface 9 that the motor vehicle is in autonomous driving mode, which can be a prerequisite for adjusting the actuating unit 2 from an operating position 204 , 205 , 206 into a stowed position 200 .
- Steering column 1 includes, in particular a steering column as explained with reference to FIGS. 2 and 3 .
- a steering wheel is arranged as a steering handle 20 on an actuating unit 2 of the steering column 1 .
- the steering handle 20 is arranged in a stowed position 200, which allows a driver maximum freedom of movement. It is provided in particular that the stowage position 200 can be assumed in an autonomous driving mode of the motor vehicle 48 in which no steering interventions by the driver are required.
- the steering handle 20 is arranged in an operating position 204 , 205 , 206 in which a driver can steer the motor vehicle 48 manually using the steering handle 20 .
- the operating position 204, 205, 206 is preferably specified individually for each driver or preset by a driver before using the vehicle for the first time, with the actual operating position 204, 205, 206 depending in particular on the size of the driver and the personal preferences of the driver. This means that the operating position is in particular not an absolute position, but is located in an operating area that can be in particular between a first position and a second position, for example anywhere between operating position 204 and operating position 206.
- a control unit 8 of the steering column 1 To adjust the actuating unit 2 from an operating position 204, 205, 206 to a stowed position 200 by means of an adjusting device 7 of the steering column 1 (not explicitly shown in Fig. 4a and Fig. 4b), it is necessary for a control unit 8 of the steering column 1 to have a motor the adjusting device 7 drives.
- the control unit generates a first signal S1 and a second signal S2, in particular by means of a logic unit designed accordingly.
- the first signal S1 is applied to a first switching unit 12 and the second signal S2 is applied to a second switching unit 13 .
- the motor of the adjustment device 7 adjusts the setting unit 2 when the first signal S1 is present at the first switching unit 12 and the second signal S2 is present at the second switching unit S2 at the same time.
- the driver of motor vehicle 48 can send an adjustment request in order to bring steering handle 20 from operating position 204 , 205 , 206 into stowage position 200 .
- the adjustment request can be sent, for example, by pressing the switch 14 .
- the adjustment request is then received by the control unit 8, with the first signal S1 being generated when the adjustment request is received.
- the adjustment request can also be received by the central control unit of motor vehicle 48 .
- the central control unit checks whether a status exists that allows a release to be issued. Such a state is, in particular, autonomous ferry operation in which no irregularity has been recorded. Lies If such a state occurs, the central control unit sends a release signal to the control unit 8 of the steering column 1.
- the release signal is received by the control unit 8, with the second signal S2 being generated when the release signal is received.
- the first signal S1 and the second signal S2 are therefore present at the same time and the motor of the adjusting device 7 of the steering column 1 is controlled by the control unit 8 in such a way that the actuating unit 2 and thus the steering handle 20 move from the operating position 204, 205, 206 to the stowed position 200 is spent.
- the central control unit determined that there was no autonomous ferry operation or that autonomous ferry operation had to be ended due to a dangerous situation, no release signal would be sent to the control unit 8 of the steering column 1 and the second signal S2 would not be generated.
- the motor of the adjustment device 7 is not actuated in such a case and the control unit 2 and thus also the steering handle 20 remain in the operating position 204, 205, 206.
- a control unit 8 designed in this way can be provided for a steering column 1, as explained in connection with FIGS. 2, 3, 4a and 4b.
- 5 schematically shows the control unit 8, which is designed in particular as an ECU (ECU: Electronic Control Unit) of the steering column.
- the control unit 8 comprises a first switching unit 12 and a second switching unit 13 as well as a logic unit 81.
- the logic unit 81 is designed for switching the first switching unit 12 and the second switching unit 13.
- the first switching unit 12 is an inverter.
- the second switching unit 13 is a field effect transistor, preferably a self-locking MOSFET.
- the electric motor 55 of an adjustment device of a steering column is connected via the first switching unit 12 and the second switching unit 13 to the on-board electrical system 87 of a motor vehicle.
- the electric motor 55, the first switching unit 12 and the second switching unit 13 are electrically connected in series with a voltage source of the vehicle electrical system 87.
- the logic unit 81 To switch the first switching unit 12, the logic unit 81 must generate a first signal S1, and to switch the second switching unit 13, the logic unit 81 must generate a second signal S2. It is provided in this embodiment that both the first switching unit 12 and the second switching unit 13, the electrically conductive connection between the voltage source of the vehicle electrical system 87 and the electric motor 55 is interrupted when neither the first signal S1 is present at the first switching unit 12 nor the second signal S2 is present at the second switching unit 13. In order for the electric motor 55 to be able to be actuated to adjust an actuating unit of the steering column and thus also to adjust the steering handle, the first signal S1 must be present at the first switching unit 12 and the second signal S2 must be present at the second switching unit 13 and thus a motor activation signal SM are generated.
- the first signal S1 is generated by the logic unit 81 independently of the second signal S2.
- logic unit 81 automatically generates the first signal S1 becomes.
- the condition for generating the second signal S2 can then be, in particular, that the first signal S1 has been generated and a confirmation signal is also received from the logic unit 81 stating that the motor vehicle is in the autonomous driving mode.
- the second signal S2 can be generated by means of an AND gate to which the first signal S1 and the confirmation signal are supplied.
- FIG. 6 shows a design variant of the exemplary embodiment according to FIG. 5.
- the second signal S2 to be controlled by the diagnosis unit 82, with the second signal S2 normally always being present.
- the diagnosis unit 82 monitors whether an error occurs in relation to the activation of the electric motor 55 .
- Such an error can be, for example, a command to bring the steering handle into a stowed position in order to enable easy access to the driver's seat, ie a so-called easy-entry function, even though the motor vehicle is driving.
- the diagnostic unit 82 interrupts the second signal S2, so that the electrically conductive connection between the vehicle electrical system 87 and the electric motor 55 is interrupted and the steering handle is not brought into the stowed position. Provision can be made for the diagnosis to switch through the second switching unit 13 for a short time.
- the diagnosis consists in particular of at least one current and/or voltage measurement of at least the first signal S1 present at the first switching unit 12 and/or the second signal S2 present at the second switching unit 13 .
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020215761.8A DE102020215761A1 (de) | 2020-12-11 | 2020-12-11 | Elektrisch verstellbare Lenksäule mit Sicherheitsschaltung und ein Verfahren zum Betreiben einer elektrisch verstellbaren Lenksäule |
| PCT/EP2021/084461 WO2022122681A1 (de) | 2020-12-11 | 2021-12-06 | Elektrisch verstellbare lenksäule mit sicherheitsschaltung und ein verfahren zum betreiben einer elektrisch verstellbaren lenksäule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4259510A1 true EP4259510A1 (de) | 2023-10-18 |
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ID=79185843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21835655.8A Pending EP4259510A1 (de) | 2020-12-11 | 2021-12-06 | Elektrisch verstellbare lenksäule mit sicherheitsschaltung und ein verfahren zum betreiben einer elektrisch verstellbaren lenksäule |
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| Country | Link |
|---|---|
| US (1) | US12497091B2 (de) |
| EP (1) | EP4259510A1 (de) |
| CN (1) | CN116648398A (de) |
| DE (1) | DE102020215761A1 (de) |
| WO (1) | WO2022122681A1 (de) |
Families Citing this family (1)
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|---|---|---|---|---|
| BE1032604B1 (de) | 2024-05-08 | 2025-12-08 | Thyssenkrupp Presta Ag | Steer-by-Wire-Lenksystem und Verfahren zum Betreiben eines Steer-by-Wire-Lenksystems mit Ausweichmöglichkeit zur Lenkwinkelbereitstellung |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4775939A (en) * | 1984-09-10 | 1988-10-04 | Aisin Seiki Kabushikikaisha | Attitude controlling system for vehicle-supported equipment |
| DE102004020048B4 (de) * | 2004-04-23 | 2012-08-30 | Christian Born | Sicherheitslenksäule für ein Kraftfahrzeug |
| JP5151128B2 (ja) * | 2006-11-30 | 2013-02-27 | 日本精工株式会社 | 電動式ステアリング装置 |
| CN103213614B (zh) | 2013-04-28 | 2015-11-11 | 长城汽车股份有限公司 | 转向管柱调节装置及电控转向管柱组件 |
| EP3042825B1 (de) | 2015-01-12 | 2022-03-09 | Volvo Car Corporation | Lenkradanordnung zum einziehen eines lenkrades eines kraftfahrzeugs |
| US10343706B2 (en) * | 2015-06-11 | 2019-07-09 | Steering Solutions Ip Holding Corporation | Retractable steering column system, vehicle having the same, and method |
| US10556614B2 (en) * | 2017-07-11 | 2020-02-11 | Nio Usa, Inc. | Body mounted sliding steering column with offset feedback actuator |
| US10457314B2 (en) * | 2017-06-26 | 2019-10-29 | Nio Usa, Inc. | Retractable telescopic mechanism for steering column with feedback actuator |
| US10745042B2 (en) | 2017-12-19 | 2020-08-18 | Mando Corporation | Steering apparatus for vehicle |
| CN108482476A (zh) | 2018-03-28 | 2018-09-04 | 武汉理工大学 | 一种伸缩型转向轴 |
| US11034377B2 (en) | 2018-07-31 | 2021-06-15 | Steering Solutions Ip Holding Corporation | System and method of automatically stowing and unstowing a steering column assembly |
| DE102019108466A1 (de) | 2018-07-31 | 2020-02-06 | Thyssenkrupp Ag | Positionserkennung für eine Lenksäule eines Kraftfahrzeuges |
| US11061401B2 (en) * | 2019-10-29 | 2021-07-13 | Ford Global Technologies, Llc | Stowable steering wheel for autonomous vehicles |
| JP7200976B2 (ja) * | 2020-05-12 | 2023-01-10 | 株式会社デンソー | ステアリング制御装置 |
-
2020
- 2020-12-11 DE DE102020215761.8A patent/DE102020215761A1/de active Pending
-
2021
- 2021-12-06 US US18/266,126 patent/US12497091B2/en active Active
- 2021-12-06 WO PCT/EP2021/084461 patent/WO2022122681A1/de not_active Ceased
- 2021-12-06 EP EP21835655.8A patent/EP4259510A1/de active Pending
- 2021-12-06 CN CN202180082912.6A patent/CN116648398A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN116648398A (zh) | 2023-08-25 |
| US12497091B2 (en) | 2025-12-16 |
| WO2022122681A1 (de) | 2022-06-16 |
| US20240034390A1 (en) | 2024-02-01 |
| DE102020215761A1 (de) | 2022-06-15 |
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