DE102020001264A1 - Adjusting device for a vehicle seat and method for its use - Google Patents

Abstract

The invention relates to an adjustment device for a vehicle seat, with at least one electric motor (10) to move at least parts of the vehicle seat, and at least one control device to specify the desired movements for the electric motor (10), the electric motor (10 ) is a permanent magnet synchronous motor.

Description

The invention relates to an adjusting device for a vehicle seat with at least one electric motor in order to move at least parts of the vehicle seat, and at least one control device in order to specify the desired movements for the electric motor.

The invention also relates to a method for adjusting a vehicle seat, a method for individually adapting basic settings of a vehicle seat and a method for generating acoustic signals for a passenger.

Modern vehicles are often equipped with so-called memory seats. These are vehicle seats on which a user makes the desired position settings once. If the user gets in again later, the position of the vehicle seat and its components are automatically adapted to the individual anatomy by motors, depending on the identity of the user. Currently, memory seats are predominantly equipped with brush motors.

Brushed motors are a suboptimal compromise between accuracy and cost for seat adjustment. Brush motors are also very limited in their performance when space is limited.

The pamphlet DE 10 2017 107 010 A1 relates to a DC motor for adjusting vehicle seats. The direct current motor has no Hall sensors, but this does not significantly improve the costs and the accuracy.

The object on which the invention is based is to improve the adjustment of a vehicle seat.

The object is achieved by an adjusting device of the type mentioned at the outset, the electric motor of the adjusting device according to the invention being a permanent magnet synchronous motor.

The permanent magnet synchronous motor (PMSM) (also known as "permanent magnet synchronous machine" or "permanent magnet synchronous machine") is an electric motor in which a rotatable rotor rotates synchronously with an electromagnetic field in or on a static stand. The rotor can be outside (external rotor) or inside (internal rotor). The rotor is a rotor of the permanent magnet synchronous motor. It is equipped with permanent magnets.

The adjustment device preferably has, depending on the situation, a higher adjustment speed for highly dynamic seat adjustment, particularly in precrash and crash situations. In particular, the adjustment device has a lower power loss due to a field-oriented control (FOC). The elimination of brushes for commutation results in a long service life. Furthermore, the higher power density results in a weight saving. By dispensing with sensors, such as Hall sensors, costs can be saved. Another cost saving is possible through the use of cheap ferrite magnets.

A loss minimization can be implemented by negative current in a d-axis in a rotor-fixed coordinate system of the motor. The electric motor can be overloaded several times without damage. Additional torque reserves are also possible through special control algorithms (maximum torque per ampere). The torque of the electric motor can additionally be increased compared to the normal operating state by impressing optimal stator currents in a q-axis in a rotor-fixed coordinate system of the motor and the d-axis. Furthermore, additional speed reserves can be implemented by weakening the field. The speed of rotation of the electric motor can additionally be increased compared to a normal operating state by impressing a negative current in the d-axis. Overall, a very high resolution and positioning accuracy is possible. Sinus commutation also results in less interference, so that there is an increase in comfort.

The permanent magnets can be attached to the rotor of the permanent magnet synchronous motor in different ways. For example, the permanent magnets are arranged on the surface of the rotor, resulting in a permanent magnet synchronous motor with surface magnets. Such a permanent magnet synchronous motor with surface magnets, which is also known as a “surface-mounted permanent magnet synchronous motor” or “surface mounted permanent magnet synchronous machine”, is referred to below as an SPMSM. The permanent magnet synchronous motor can also be a brushless DC motor ("Brushless DC Machine" or BLDC). The brushless DC motor can be an SPMSM with concentrated windings (“SPMSM with concentrated windings”). Alternatively, the permanent magnets can be embedded as “buried” or internal magnets in an electrical sheet of the rotor. Such a permanent magnet synchronous motor with buried or internal magnets is referred to below as IPMSM (“Interior Permanent Magnet Synchronous Motor”).

The adjustment device is used to adjust a vehicle seat. The adjustment device has at least one control device in order to control movements of the vehicle seat, in particular in order to specify desired movements for the electric motor. The adjustment device also has an electric motor in order to carry out adjustment movements on the vehicle seat, in particular in order to move at least parts of a vehicle seat. The term control device is used here as a generic term for regulating devices and control devices. The term control is used here as a generic term for regulation and control. The term power connections here means the phase connections of the electric motor.

The electric motor preferably has several electric coils and permanent magnets. The electric motor is preferably set up to move parts of the vehicle seat to a specific distance from other parts of the vehicle seat.

In particular, the permanent magnet synchronous motor is designed without sensors. The permanent magnet synchronous motor is preferably a sensorless permanent magnet synchronous motor with buried or internal magnets. There are preferably no Hall sensors within the housing of the electric motor.

A movable part of the vehicle seat is, for example, the backrest, which can be pivoted. The electric motor used to adjust the vehicle seat or another electric motor of the adjusting device can be set up to move one or more objects in accordance with a specification of the control device. In this context, a pedal with an adjustable distance to the driver, a spoiler with a variable inclination relative to the road and / or an adjustable distance to the body, a vehicle door, in particular a wing door, a sliding roof with a variable opening size and / or variable inclination relative to the road , a shading device for a vehicle, in particular the top of the head, and / or a cover or a ceiling of an object can be moved in or on a vehicle cabin.

In a preferred embodiment of the adjustment device, the control device controls the electric motor in at least one operating state in such a way that the electric motor generates an acoustic signal to alert a passenger to a dangerous situation to which the control device reacts with an adjustment Movement of the adjustment device reacts or will react, a dangerous situation to which the control device does not react or will not react with an adjustment movement of the adjustment device, and / or or to an event or a choice option that the passenger is available. A dangerous situation to which the control device reacts or will react with an adjustment movement of the adjustment device can relate to a collision or a skidding of the vehicle. A dangerous situation to which the control device does not react or will not react with an adjustment movement of the adjustment device can be an open vehicle door, a low fuel supply or a low battery charge level. An event or dialing option available to the passenger may involve an incoming phone call from a specific person, the proximity of gas stations within a certain range, or a certain movement of children in the back seat. An acoustic signal preferably contains at least one sound that is different from the sound of an adjustment movement that may be taking place.

In a preferred embodiment of the adjustment device, the control device is set up to cause the electric motor to move the vehicle seat or parts thereof into a specific position, to move the passenger further away from a collision zone and / or to provide the passenger with more space . Furthermore, the control device can be set up to cause the electric motor to prevent, reduce or slow down a disadvantageous movement of the passenger and / or to reduce or redistribute forces acting on the passenger. A disadvantageous movement of the passenger, which leads to whiplash trauma due to the lack of a headrest and the whiplash effect, can thus be avoided. The reduction or redistribution of forces acting on the passenger is preferably carried out at least in terms of time or location, for example to bring about an early deceleration or a shock distribution over a larger padding area. The main benefit of the adjustment movement can lie in the changed sitting position after the movement has been completed. For example, a backrest tilted forward prevents the passenger's body from being lashed back by a reflex movement in the event of a collision. The adjustment movement can be used to brake the passenger even before the collision. The passenger can be an endangered person on, in front of or behind the adjusted vehicle seat.

Further embodiments of the adjustment device are the subject of the claims.

The object on which the invention is based is also achieved by a method for adjusting a vehicle seat, an adjusting device according to one of claims 1 to 11 being used for this purpose. Regarding the advantages and modifications this method is also referred to the advantages and modifications of the adjustment device according to the invention.

The object on which the invention is based is also achieved by a method for individually adapting basic settings of a vehicle seat, an adjustment device according to one of claims 1 to 11 being used for this purpose. With regard to the advantages and modifications of this method, reference is also made to the advantages and modifications of the adjusting device according to the invention.

The passenger is preferably assisted in moving the vehicle seat or one of its components in the desired direction or position by actively moving the vehicle seat or one of its components by the electric motor in the desired direction or position. The assistance preferably takes place at least until the passenger no longer exerts any mechanical force on the vehicle seat or one of its components. In particular, the new position of the vehicle seat or its component is at least saved or fixed.

The object on which the invention is based is also achieved by a method for generating acoustic signals for a passenger, an adjustment device according to one of claims 1 to 11 being used for this purpose. With regard to the advantages and modifications of this method, reference is also made to the advantages and modifications of the adjusting device according to the invention.

• 1 einen Permanentmagnet-Synchronmotor mit Oberflächenmagneten (SPMSM) im Schnitt senkrecht zur Rotationsachse des Motors; und
• 2 einen Permanentmagnet-Synchronmotor mit vergrabenen Magneten (IPMSM) ebenfalls im Schnitt senkrecht zur Rotationsachse des Motors.

Preferred embodiments of the invention are explained and described in more detail below with reference to the accompanying drawings. Show:

• 1 a permanent magnet synchronous motor with surface magnets (SPMSM) in a section perpendicular to the axis of rotation of the motor; and
• 2 a permanent magnet synchronous motor with buried magnets (IPMSM), also in a section perpendicular to the axis of rotation of the motor.

The 1 and 2 each show an electric motor 10 an adjustment device according to the invention. The electric motors 10 each include a stator 12th , a winding 14th , a wave 16 , a rotor 18th and permanent magnets 20th .

The permanent magnet synchronous motors 10 can regulate a rotor angle even at a standstill with suitable control. This is especially true when the permanent magnet synchronous motor 10 as permanent magnet synchronous motor with internal magnets 20th is executed. For reasons of cost, it is advantageous if the control device with which the respective electric motor 10 a movement can be predetermined, spaced from the electric motor 10 is arranged.

In addition, there is no need for expensive sensors if the electric motor 10 has three electrical power connections to drive its rotor, which are energized out of phase with each other during operation when these three power connections of the electric motor 10 are electrically connected to their power supply via their own electrical connection line with the control device, and if there is no further electrical connection line for the transmission of additional information between the electric motor 10 and control device exists, in particular no separate signal line. This applies in particular to "sensorless" permanent magnet synchronous motors (sensorless PMSM) that do not have Hall sensors within their housing.

Such an adjustment device allows the control device to operate the electric motor when a dangerous situation is recognized 10 independently adjusted to reduce the risk of injury to passengers. The torque and response time of such electric motors 10 is superior to the torque and response time of previously used motors.

1. 1) Der Sitz oder Teile davon werden in eine Position verfahren,
   • - die einen Passagier weiter von einer Kollisionszone entfernt,
   • - die dem Passagier mehr Raum verschafft, und/oder
   • - die eine nachteilige Bewegung des Passagiers verhindert, vermindert oder verlangsamt. (z.B. Peitschen-Effekt bei Schleudertrauma ohne Kopfstütze);
2. 2) Auf den Passagier einwirkende Kräfte werden durch die Verstell-Bewegung vermindert oder umverteilt, was vorzugsweise zumindest zeitlich oder örtlich erfolgt (z.B. vorgezogene Abbremsung oder Stoßverteilung auf größere Polsterfläche).

There are various options for optimizing the effect of the adjustment device:

1. 1) The seat or parts of it are moved into a position
   • - which removes one passenger further from a collision zone,
   • - which gives the passenger more space, and / or
   • - which prevents, reduces or slows down an adverse movement of the passenger. (e.g. whiplash effect in whiplash injuries without a headrest);
2. 2) Forces acting on the passenger are reduced or redistributed by the adjustment movement, which preferably takes place at least in terms of time or location (for example, advanced braking or impact distribution over a larger cushion area).

The main benefit of the adjustment movement can be in the changed sitting position after the movement has been completed (tilted backrest in the event of a collision prevents the passenger's body from lashing back through reflex movement), but also the adjustment movement itself and its effect during the movement process (e.g. braking of the passenger before the collision).

• - eine Höhenposition relativ zum Chassis des Fahrzeuges,
• - ein Abstand relativ zur Fahrzeuglängsachse,
• - eine Position längs des Fahrzeuges entlang der Fahrzeug-Längsachse,
• - ein Abstand zu anderen Teilen des Fahrzeugsitzes,
• - ein Neigungswinkel relativ zum Passagier,
• - ein Neigungswinkel relativ zum Boden des Fahrzeugs, und/oder
• - ein Neigungswinkel relativ zu anderen Teilen des Fahrzeugsitzes.

The passenger can be an endangered person on, in front of or behind the adjusted vehicle seat. Position can mean at least one of the following options:

• - a height position relative to the chassis of the vehicle,
• - a distance relative to the vehicle's longitudinal axis,
• - a position along the vehicle along the vehicle's longitudinal axis,
• - a distance to other parts of the vehicle seat,
• - an angle of inclination relative to the passenger,
• - an angle of inclination relative to the floor of the vehicle, and / or
• - an angle of inclination relative to other parts of the vehicle seat.

• - eine Bereitschaft der Verstell-Einrichtung, manuelle Verstellungen am Fahrzeugsitz zu erlauben, vorzugsweise durch einfaches Drücken oder Ziehen am Fahrzeugsitz oder seiner zu verstellenden Komponente,
• - eine Verriegelung der Verstell-Einrichtung, die eine manuelle Verstellung am Fahrzeugsitz danach unterbindet,
• - eine gerade ablaufende oder zeitnah erfolgende Verstell-Bewegung, um Passagiere auf ein möglicherweise nötig werdendes Ausweichen ihrerseits oder auf eine Anpassung ihrer Körperhaltung vorzubereiten,
• - eine Gefahrensituation, auf die die Kontroll-Einrichtung mit einer Verstell-Bewegung der Verstell-Einrichtung reagiert oder reagieren wird (z.B. eine Kollision oder ein Schleudern des Fahrzeugs),
• - eine Gefahrensituation, auf die die Kontroll-Einrichtung mit einer Verstell-Bewegung der Verstell-Einrichtung nicht reagiert oder nicht reagieren wird (z.B. eine offenstehende Fahrzeugtür, geringer Treibstoff-Vorrat oder niedriger Batterie-Ladezustand); und/oder
• - ein Ereignis oder eine Wahloption, die dem Passagier zur Verfügung steht (z.B. ein eingehender Telefon-Anruf einer bestimmten Person, die Nähe von Tankstellen innerhalb einer bestimmten Reichweite oder bestimmte Bewegungen von Kindern auf dem Rücksitz).

It can be useful if the control device is the electric motor 10 controls in at least one operating state that the electric motor 10 generates an acoustic signal to alert a passenger to at least one of the following situations:

• - A readiness of the adjustment device to allow manual adjustments to the vehicle seat, preferably by simply pushing or pulling the vehicle seat or its component to be adjusted,
• - a locking of the adjustment device, which then prevents manual adjustment of the vehicle seat,
• - an adjustment movement that is currently taking place or is about to take place in order to prepare passengers for an evasive action that may become necessary on their part or for an adjustment of their posture,
• - a dangerous situation to which the control device reacts or will react with an adjustment movement of the adjustment device (e.g. a collision or a skidding of the vehicle),
• a dangerous situation to which the control device does not react or will not react with an adjustment movement of the adjustment device (for example an open vehicle door, low fuel supply or low battery charge status); and or
• - an event or a choice option available to the passenger (e.g. an incoming phone call from a specific person, the proximity of gas stations within a certain range or certain movements of children in the back seat).

An acoustic signal contains at least one sound that is different from the sound of an adjustment movement that may be taking place.

It is useful if different types of signals are provided for different situations and if at least two signals differ in terms of the duration of sounds, the duration of pauses or intervals, the frequencies used at least temporarily, the frequency of sounds and / or the frequency changes during the sound generation.

• - eine von einem individuellen Benutzer gewünschte Grund-Position, und/oder
• - eine in einer Gefahrensituation sinnvolle Verstell-Bewegung oder Ziel-Position.

If an adjustment device has a control device with data memory, at least one of the following values can be saved:

• - a basic position desired by an individual user, and / or
• - an adjustment movement or target position that makes sense in a dangerous situation.

• - Der Fahrzeugsitz wird zur Verstellung freigeschaltet. Das kann durch Eintritt unterschiedlicher Ereignisse ausgelöst oder gestattet werden (z.B. eine Bedienung einer Benutzerschnittstelle oder ein Öffnen einer Fahrzeugtür kann eine Freischaltung verursachen, vorzugsweise unter der gleichzeitig zu erfüllenden Bedingung, dass der zu verstellende Fahrzeugsitz unbesetzt ist).
• - Der Passagier übt eine mechanische Kraft direkt auf den Fahrzeugsitz oder eine seiner Komponenten aus, um ihn eine gewünschte Richtung oder Stellung zu verschieben.

A method for adjusting or individually adapting basic settings of a vehicle seat is advantageous if an adjusting device according to the invention is used for this. This is advantageously done in the following steps:

• - The vehicle seat is enabled for adjustment. This can be triggered or permitted by the occurrence of different events (for example operating a user interface or opening a vehicle door can cause activation, preferably under the condition to be fulfilled at the same time that the vehicle seat to be adjusted is unoccupied).
• The passenger exerts a mechanical force directly on the vehicle seat or one of its components in order to move it in a desired direction or position.

The adjustment device allows the electric motor 10 a movement in the desired direction or supports such a movement by actively moving the electric motor 10 in this direction, at least until this force is no longer effective. This becomes a basic position of the engine 10 and its runner is specified as the zero point. By monitoring the rotor position of the electric motor 10 During an adjustment of the vehicle seat or another component, the direction of movement, the angle of rotation and the number of rotor revolutions by which the rotor of the motor can be determined 10 moved out of its home position. Ultimately, this results in the length and direction of a shift and thus also the new position.

The new position of the vehicle seat or its component is at least saved or fixed. The storage or fixation can likewise be triggered again by the occurrence of different events or made dependent thereon (for example by operating a user interface or closing a vehicle door can cause a fixation or storage). The new position can be stored in the control device or in another control unit of the vehicle.

It can be advantageous to generate acoustic signals for a passenger by using an adjustment device according to the invention.

The permanent magnet synchronous motor 10 can have such a pronounced pole that, with suitable control, a rotor angle can be regulated even at a standstill. In particular is the electric motor 10 for this purpose a permanent magnet synchronous motor with internal magnets 20th and / or a brushless DC motor.

To determine the rotor position, the electric motor 10 existing phase currents or phase voltages or both are determined. The control device calculates the current angular position from this.

For this purpose, the control device preferably has a virtual model of the electric motor 10 . This model can be represented by parameter maps or by software that simulates the behavior of the synchronous machine. Additional sensors such as Hall sensors and incremental encoders are not required for this.

The virtual model of the synchronous machine is preferably also able to measure the temperature of windings 14th of the stator 12th without the need for an additional sensor. This allows reliable overtemperature or overload protection and further diagnostic options.

The vehicle seat is positioned without resorting to data that is queried by sensors in the motor with conventional adjustable motors.

For sensorless positioning of the permanent magnet synchronous motor 10 it is required that the permanent magnet synchronous motor 10 has as “a pronounced pole” as possible (magnetic saliency).

The degree of expression of a pole of the permanent magnet synchronous motor 10 results from the difference in their inductances in the q-axis (Lq) and in the d-axis (Ld) in the rotor-fixed coordinate system of the motor 10 . The more different the inductances Lq and Ld are, the more pronounced is the pole.

In practice, electric motors with a ratio of Lq = (1.05 ... 3) Ld are used. For sensorless seat control, however, values of Lq / Ld at 1.05 cannot be considered because the measurement effort is too high. Rather, an Lq / Ld ratio of at least 2, preferably higher, is of interest.

To operate the electric motor 10 the control device determines the current connections of the permanent magnet synchronous motor 10 applied electrical potentials and the electrical phase currents flowing through them. Because of the about the electric motor 10 known data, in particular characteristic changes in inductance when the permanent magnet synchronous motor rotates 10 and a predetermined starting position of the vehicle seat, the control device determines the angular position of the rotor and the number of revolutions made by the electric motor 10 has performed since leaving the starting position. In combination, this enables the exact distance to the starting position and the current position of the servomotor 10 determine.

Since permanent magnet synchronous motors are largely wear-free, they can be used to generate tones or melodies without the permanent magnet synchronous motor 10 Takes damage. By means of a control method for controlling the motor 10 this becomes an acoustic signal generator, i.e. also a kind of small loudspeaker. To do this, you stimulate the electric motor 10 with different frequencies, which do not generate a suitable rotating field to turn the rotor. For example, acoustic feedback can be given to the driver without additional component costs.

The high control quality and the high torque reserves of the electric motor 10 allow a reduction in the mechanical reduction. As a result, the seat can be adjusted in such a way that the user is supported when adjusting the vehicle seat or its components. The setting here can mean adjusting the vehicle seat to an individual basic position. But it can also mean one (of several) changed attitude towards the basic position.

Direct manual adjustment has the advantage that additional control buttons and their wiring are not required. In addition, setting is intuitively easier, since the user no longer has to find out how the vehicle seat changes when a button is operated. Rather, the seat sensor system or the control device of the adjustment device must now determine how it expediently converts the desired adjustment movements of the passenger into movements of electric motors.

List of reference symbols

10

Electric motor

12th

stator

14th

Winding

16

wave

18th

rotor

20th

Permanent magnets

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102017107010 A1 [0005]

Claims (15)

Adjusting device for a vehicle seat, with - at least one electric motor (10) to move at least parts of the vehicle seat, and - at least one control device to specify the desired movements for the electric motor (10), characterized in that the electric motor ( 10) is a permanent magnet synchronous motor. Adjustment device according to Claim 1 , characterized in that the permanent magnet synchronous motor (10) is a brushless direct current motor (10) or a permanent magnet synchronous motor (10) with internal magnets (20). Adjusting device according to one of the preceding claims, characterized in that - that the electric motor (10) has a rotatably mounted rotor and has three electrical power connections for driving the rotor, which are energized out of phase with each other during operation, - that the three power connections of the electric motor ( 10) are electrically connected to their power supply via their own electrical connection line with the control device, - that depending on the angular position of the rotor relative to the stator (12) of the permanent magnet synchronous motor (10), the inductance between at least two of these power connections of the Electric motor (10) changes; and / or - that there is no further electrical connection line for the transmission of additional information between the electric motor (10) and the control device, in particular no separate signal line. Adjusting device according to one of the preceding claims, characterized in that the control device is arranged at a distance from the electric motor (10). Adjusting device according to one of the preceding claims, characterized in that the permanent magnet synchronous motor (10) is designed without sensors. Adjusting device according to one of the preceding claims, characterized in that the control device independently adjusts the electric motor (10) when a dangerous situation is recognized in order to reduce the risk of injuries for passengers. Adjusting device according to one of the preceding claims, characterized in that the control device is set up to cause the electric motor (10) to - move the vehicle seat or parts thereof into a specific position, - move the passenger further away from a collision zone - to create more space for the passenger, - to prevent, reduce or slow down an adverse movement of the passenger; and / or - to reduce or redistribute forces acting on the passenger. Adjusting device according to one of the preceding claims, characterized in that the control device is set up to cause the electric motor (10) to move the vehicle seat or parts thereof - in a specific height position relative to the chassis of the vehicle; - to a specific distance relative to the vehicle's longitudinal axis, - to a specific position along the vehicle along the vehicle's longitudinal axis, - to a specific angle of inclination relative to the passenger, and / or - to move in a specific angle of inclination relative to the floor of the vehicle. Adjusting device according to one of the preceding claims, characterized in that the control device controls the electric motor (10) in at least one operating state so that the electric motor (10) generates an acoustic signal to alert a passenger to at least one the following situations: - the readiness of the adjustment device to allow manual adjustments to the vehicle seat, preferably by simply pushing or pulling on the vehicle seat or its component to be adjusted, - a locking of the adjustment device, which then prevents manual adjustment of the vehicle seat - an adjustment movement that is currently running or that is taking place in the near future in order to prepare passengers for an evasive action that may become necessary on their part or for an adjustment of their posture, - a dangerous situation to which the control device reacts with an adjustment movement of the adjustment device or will react - a danger rensituation to which the control device does not react or will not react with an adjustment movement of the adjustment device; - an event or an option available to the passenger. Adjusting device according to the preceding claim, characterized in that - different types of signals are provided for different situations, and / or - that at least two signals differ in at least one of the following features: - duration of sounds, - duration of pauses or intervals, - their at least temporarily used frequencies, - frequency of sounds, - frequency changes during sound generation. Adjustment device according to one of the preceding claims, characterized in that the control device has a data memory in order to store at least one of the following values: - a basic position desired by an individual user, - an adjustment useful in a dangerous situation -Movement or target position. Method for adjusting a vehicle seat, characterized in that an adjusting device according to one of the preceding claims is used for this. Method for the individual adjustment of basic settings of a vehicle seat, characterized in that an adjusting device according to one of the Claims 1 to 11 is used. Method according to the preceding claim, characterized by the following steps: - enabling the vehicle seat for its adjustment; - Direct exertion of a mechanical force by a passenger on the vehicle seat or one of its components in order to move the vehicle seat or one of its components in a desired direction or position; - Assisting the passenger in moving the vehicle seat or one of its components in the desired direction or position by actively moving the vehicle seat or one of its components by the electric motor (10) in the desired direction or position. Method for generating acoustic signals for a passenger, characterized in that an adjusting device according to one of the Claims 1 to 11 is used.

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