Brake booster device with deformable actuator

Abstract

An exemplary brake booster device includes, among other things, a brake booster mounted on a vehicle component and an actuator that pivots to move the brake booster upward in response to a force applied to the actuator through a transmission housing. The actuator includes at least two pivoting elements spaced apart from each other and a shifter mounted in engagement between the at least two pivoting elements.

Description

Technical Field

[0001] The present disclosure generally relates to a brake booster mounted to a vehicle component via at least one fastening point. Background Art

[0002] A motor vehicle can be equipped with a brake booster for boosting the pedal force. A low-pressure brake booster can be used. However, a motor vehicle can also be equipped with an electric brake booster. An electric brake booster can be particularly advantageous for use in electric vehicles and hybrid vehicles. In an electric brake booster, pulses of the brake pedal can be used to induce an alternating voltage in a coil through a combination of a coil and an iron core to release kinetic energy. The kinetic energy supports the braking force of the pedal. German Patent No. 202010017605 describes an exemplary electric brake booster.

[0003] Transmissions for hybrid vehicles are usually of relatively large size because they contain components and functions that are not required for transmissions of vehicles with only internal combustion engines. For example, a transmission for a hybrid vehicle may have components and functions that make it possible to switch between different drive types, such as electric and internal combustion engines. The electric motor and necessary additional transmission units may also be accommodated in the transmission housing.

[0004] If a large transmission with associated housing and electric brake booster is used in a hybrid vehicle, a direct force connection between the transmission housing and the brake booster system may occur during a frontal collision due to the packaging of the transmission housing and the electric brake booster system in the X direction. However, this may lead to undesired deformation of the bulkhead, displacement of the brake pedal and deformation of the instrument panel bracket. The steering column may also move. Summary of the invention

[0005] A brake booster device according to an exemplary aspect of the present disclosure includes a brake booster mounted on a vehicle component via at least one fastening point and a deformable actuator formed by at least two pivot elements and a shift element. The two pivot elements are mounted on the vehicle component at intervals from each other so that they can pivot around corresponding rotation axes extending in the Y direction. The shift element is mounted between the two pivot elements in an engaged manner. The actuator is configured to pivot around the rotation axes of the two pivot elements under the action of a force in the X direction generated by a transmission housing. The actuator pivots to apply a force to the brake booster in the Z direction, whereby the position of the brake booster is changeable. The actuator is mounted below the brake booster and applies an upward force to the brake booster in the Z direction during the pivoting process.

[0006] In another example of the above apparatus, the brake booster rotates about a tilt axis in the Y direction due to the force of the actuator.

[0007] In another example of any of the foregoing apparatus, the tilt axis is located at a fastening point of the brake booster on the vehicle component.

[0008] In another example of any of the foregoing apparatus, the brake booster is displaced in the Z direction due to a force of the actuator.

[0009] In another example of any of the foregoing apparatus, the brake booster is displaced along a surface of the vehicle component on which the at least one fastening point is disposed.

[0010] In another example of any of the foregoing apparatus, the pivoting member of the actuator has an inclined design that provides a contact surface to contact the brake booster.

[0011] Another example of any of the foregoing devices includes multiple rotational joints between the displacement element and the pivot element, multiple rotational axes between the pivot element and the vehicle component, or both, the rotational joints and / or rotational axes being formed partially from a material having a stiffness lower than the stiffness of the pivot element, the displacement element, or both.

[0012] Another example of any of the foregoing devices includes at least one fastening point formed by an elongated hole having two lateral narrowings, the elongated hole being divided into two adjacent hole regions by the two lateral narrowings. The longitudinal extent of the elongated hole extends in the Z direction, and when a force is applied to the brake booster in the Z direction, the threaded connection moves from the first hole region to the second hole region by widening of the narrowings.

[0013] A method according to another exemplary aspect of the present disclosure includes pivoting a deformable actuator formed by at least two pivot elements and a displacement element. The two pivot elements are mounted on a vehicle component at intervals from each other so that they can pivot about an axis of rotation. The displacement element is mounted between the two pivot elements in an engaged manner. The actuator pivots about the axis of rotation of the two pivot elements in response to a force applied by a transmission housing in an X direction. The method also includes, during the pivoting, applying a force to a module mounted on a bulkhead in a Z direction using an actuator to change a position of the module mounted on the bulkhead.

[0014] In another example of the above method, the X direction is horizontal and the Z direction is vertical.

[0015] In another example of any of the foregoing methods, the module is displaced in the Z direction by a force applied to the module by an actuator in the Z direction.

[0016] In another example of any of the foregoing methods, the module is a brake booster.

[0017] In another example of any of the foregoing methods, the module remains attached to the bulkhead while the position of the module is changed by applying a force to the module in the Z direction via the actuator.

[0018] A brake booster device according to another exemplary aspect of the present disclosure includes, among other things, a brake booster mounted on a vehicle component and an actuator. In response to a force applied to the actuator by a transmission housing, the actuator pivots to move the brake booster upward. The actuator includes at least two pivot elements spaced apart from each other and a shifter mounted in an engaging manner between the at least two pivot elements.

[0019] In another example of the foregoing arrangement, at least two pivot elements are pivotably connected to the vehicle component such that the at least two pivot elements are pivotable relative to the vehicle component about respective rotation axes extending in the Y direction.

[0020] In another example of any of the foregoing apparatus, the force applied to the actuator is a horizontal force in the X-direction.

[0021] In another example of any of the foregoing apparatus, the vehicle component is a bulkhead.

[0022] In another example of any of the foregoing apparatus, the brake booster rotates about an axis of rotation in the Y direction in response to upward movement of the actuator.

[0023] In another example of any of the foregoing apparatus, the brake booster slides upward relative to the vehicle component in response to the upward movement of the actuator.

[0024] In another example of any of the foregoing apparatus, the brake booster is displaced in the Z direction due to a force of the actuator.

[0025] The embodiments, examples and alternatives of the preceding paragraphs, claims or the following description and drawings (including any of their various aspects or individual features) may be presented independently or in any combination. Features described in conjunction with one embodiment are applicable to all embodiments unless these features are incompatible. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The various features and advantages of the disclosed examples will become apparent to those skilled in the art from the detailed description. The drawings accompanying the detailed description can be briefly described as follows:

[0027] Figure 1 A schematic side view showing a transmission housing and a brake booster with an actuator in normal operation;

[0028] Figure 2 shows an enlarged view of a swivel joint having protection against twisting in normal operation;

[0029] Figure 3 Shown in accordance with Figure 1 a transmission housing when a brake booster having an actuator first contacts the transmission housing;

[0030] Figure 4 FIG. 2 shows a brake booster according to the first embodiment after the deflection caused by the actuator according to the first embodiment. Figure 1 Brake booster;

[0031] Figure 5 FIG. 2 shows the deflection of the brake booster caused by the actuator according to the second embodiment. Figure 1 Brake booster;

[0032] Fig. 6A An embodiment showing fastening points in normal operation;

[0033] Figure 6B An exemplary embodiment of a fastening point after deflection of the brake booster is shown. DETAILED DESCRIPTION

[0034] The present disclosure is generally directed to providing a brake booster arrangement in response to a frontal collision of a vehicle. The brake booster arrangement may be particularly suitable for use in an electric brake booster used in combination with a large transmission.

[0035] In an exemplary non-limiting embodiment of the present disclosure, the brake booster is mounted on the vehicle component via at least one fastening point. The brake booster can be an electric or electromechanical brake booster. The brake booster can be mounted on the bulkhead of the motor vehicle. This is done via at least one fastening point, which can be designed as a threaded connection, for example. A plurality of fastening points can be provided. However, other modules fastened to the bulkhead, such as electronic stability program (ESP) modules, can also be moved from their position.

[0036] The brake booster device comprises a deformable actuator which can be formed by at least two pivoting elements and a displacement element. Here the two pivoting elements are mounted on the vehicle component at a distance from each other so that they can pivot about a rotation axis extending in the Y direction, while the displacement element is mounted in a joined manner between the two pivoting elements. Here the actuator can also be mounted on a bulkhead. However, it can also be assembled on other vehicle components.

[0037] The actuator is deformable in that its elements can change their position relative to each other under the action of a certain amount of force. However, the elements themselves do not deform substantially. Instead, they are rigid and hard enough to withstand the forces generated and transmit them to the brake booster. The actuator is particularly designed to pivot about the rotation axis of two pivot elements under the action of a force in the X direction generated by the transmission housing, whereby the actuator applies a force to the brake booster in the Z direction. The position of the brake booster can thus be changed. The X direction here represents the longitudinal direction of the motor vehicle in the vehicle coordinate system, while the Z direction represents the vertical direction. The Y direction corresponds to the transverse direction of the vehicle.

[0038] The actuator of the brake booster device according to an exemplary embodiment is arranged and designed so that it exerts a force on the brake booster in the Z direction when it is subjected to a force generated by the transmission housing in the X direction. Due to the action of this force in the Z direction, the brake booster moves out of the X load path in the Z direction.

[0039] In one exemplary embodiment, the brake booster can move upward in the Z direction and can slide along the upper side of the transmission housing. The actuator can be pivotally mounted below the brake booster and can pivot to apply an upward force to the brake booster in the Z direction. The axis of rotation of the pivoting element of the actuator then extends in the Y direction so that the actuator can pivot upward.

[0040] In the event of a frontal collision, the housing of the transmission of the motor vehicle can move in the X direction towards the brake booster. In response, the transmission housing can strike the actuator, which thus pivots about the rotation axis of the pivot element, thereby exerting a force on the brake booster in the Z direction. The actuator is thus pivoted out of its normal position, in which it does not exert a force on the brake booster, into an activated position in which it pushes the brake booster away in the Z direction. Here the actuator can easily already be in contact with the brake booster in the normal position. The required contact may result from the pivoting movement.

[0041] Due to the deformation and pivoting movement of the actuator, the position of the brake booster can be changed in different ways. In one embodiment of the invention, the brake booster is rotated about a tilting axis extending in the Y direction due to the force of the actuator. This tilting axis is formed in particular on the vehicle component on which the brake booster is mounted (for example on the bulkhead). For example, such a tilting axis is formed at a fastening point of the brake booster on the vehicle component. It can also be formed by two fastening points.

[0042] The actuator then applies a force to the brake booster in the Z direction, which causes the brake booster to rotate about the tilting axis. The tilting axis is preferably selected here so that the lower side of the brake booster is rotated into a position in which the transmission housing can be moved in a wedging manner under the brake booster or the lower side of the brake booster can slide along the upper side of the transmission housing. As a result, the side of the brake booster facing the transmission housing is raised due to the rotation.

[0043] The tilt axis can be located in the lower, middle or upper region of the brake booster. Furthermore, the twisting of the brake booster can enable or require a separation or at least deformation of the fastening points. The bulkhead may have to be deformed so that the brake booster can be rotated about a horizontal tilt axis formed in the bulkhead. Although the brake booster partially penetrates into the bulkhead, the brake booster does not penetrate deep into the passenger compartment, since the transmission housing and the brake booster do not form a package in the X direction.

[0044] In another embodiment of the present disclosure, the brake booster is linearly displaced in the Z direction due to the force of the actuator. The brake booster is thus pushed upward as a whole. For example, the brake booster here can be displaced along the surface of the vehicle component on which at least one fastening point is arranged. If the vehicle component is a bulkhead, the brake booster is displaced upward along the bulkhead. If the bulkhead is inclined, the displacement contains a component in the X direction in addition to the component in the Z direction.

[0045] Such a displacement of the brake booster may also lead to or require the fastening points to be separated or at least deformed. The fastening points inevitably give way here, or they are specially constructed to enable the brake booster to be displaced when there is a certain force component in the Z direction. In one embodiment of the present disclosure, it is provided, for example, that at least one fastening point is formed by a longitudinally elongated hole with two lateral narrowing parts, by which the longitudinally elongated hole is divided into two mutually adjacent hole areas. Here, the longitudinal extent of the longitudinally elongated hole extends in the Z direction, and when a force is applied to the brake booster along the Z direction, the threaded connection is moved from the first hole area into the second hole area by the widening of the narrowing part. The brake booster can thus be displaced in a controlled manner without the threaded connection being separated at all.

[0046] The actuator is formed by a plurality of elements which change their position relative to each other during the pivoting movement of the actuator. These elements may comprise at least two elements which may be referred to as pivot elements, since they are pivotably mounted on a vehicle component such as a bulkhead. These pivot elements are mounted on the vehicle component at intervals from each other. These pivot elements are preferably arranged one above the other. The two pivot elements are connected to each other in their pivotable region via at least one other element, which is referred to as a displacement element, since its position is displaced during the pivoting movement of the actuator. For this purpose, the displacement element is connected to the pivot element in an engaged manner.

[0047] The actuator can be arranged so that the transmission housing strikes the lower pivot element in the event of a frontal collision and causes this pivot element to pivot upwards. To this end, the lower pivot element protrudes from the vehicle component in the direction of the transmission housing, wherein the lower pivot element is guided upwards from the vehicle component at a certain slope. The displacement element extends at a certain slope and more precisely extends obliquely upwards in the direction of the vehicle component. Therefore, the lower rotary joint is closer to the transmission housing than the upper rotary joint. The transmission housing therefore strikes the inclined pivot element from below in the area of ​​the rotary joint, whereby the pivot element pivots upwards around its axis of rotation. The upper pivot element also protrudes upwards from the vehicle component at a certain slope. The displacement element connects the two pivot elements so that the pivoting movement of the lower pivot element causes a synchronous pivoting movement of the upper pivot element. The displacement element is displaced upwards and towards the vehicle component. The actuator can therefore be folded during the pivoting movement without deforming the element. The size of the elements and the angle between them are selected accordingly. In particular, the rotation axis of the pivot element and the rotation joint between the pivot element and the displacement element may form a parallelogram.

[0048] The individual elements of the actuator can be formed from bars, tubes, profiles, plates or other rigid components. These elements are designed to be so rigid and stable that they withstand the forces that occur and do not deform. For this purpose, the elements are preferably designed to be high-strength, for example, made of steel, sheet metal, aluminum, forged components. The connection of these elements to each other or to other vehicle parts such as bulkheads can be achieved in various ways. For example, the connection can be a connection with a certain degree of freedom, for example a connection that is in the form of a hinge. Thus, a joint connection can be formed, for example, by a bolt guided through two bushings.

[0049] However, the connection of the two elements can also be produced via a material section with a lower stiffness than the stiffness of the components connected to each other. For example, the first element and the second element of the actuator can be formed by a sheet or profile made of metal that is bent between the two elements. In this bending area, the stiffness of the metal is lower than the stiffness in the area of ​​the two elements. In normal operation, the actuator retains its shape and the position of the elements of the actuator does not change. However, when a force action is introduced in the X direction through the transmission housing, the connection area with lower stiffness gives way and the position of the elements relative to each other can change.

[0050] Material sections of this type with a lower stiffness can be used both for connecting the displacement element to the pivot element and for connecting the pivot element to the vehicle component. For example, in one embodiment of the disclosure, it is provided that the rotation joint between the displacement element and the pivot element and / or the axis of rotation between the displacement element and the vehicle component is formed by a material section with a lower stiffness than the stiffness of the pivot element or the displacement element.

[0051] If the axis of rotation between the pivot element and the vehicle component is formed by a material portion with lower rigidity, a reinforcing element can be provided which is securely fixed to the vehicle component. The reinforcing element and the pivot element are then formed by a common component, which is however bent in the area of ​​the axis of rotation. In this bent portion, the rigidity of the material of the component is lower than in the material portion forming the pivot element and the reinforcing element. If a force is applied to the actuator in the X direction via the transmission housing, the material portion with low rigidity is deformed. This results in an axis of rotation about which the pivot element can pivot. The reinforcing element on the vehicle component can likewise be formed by bars, tubes, profiles, plates or other components. In this case, the fastening point of the reinforcing element on the vehicle component is very close to the axis of rotation to be generated in order to bring about a defined fold in this area.

[0052] In one embodiment of the present disclosure, the actuator is formed by a continuous member that is bent at multiple points to form the various elements of the actuator. Under the action of a force in the X direction, the member folds at the bending point. For example, a bar or a plate can be bent multiple times and mounted on a vehicle component by its free end. Bending regions with lower rigidity are respectively located in the region of the two rotation axes formed on the vehicle component for the pivot element. In the further scope of the member, two additional bending regions with lower rigidity are provided to form a rotary joint. Between such a rotary joint and the vehicle component, the member then forms a corresponding pivot element, while it forms a displacement element between the two rotary joints. Therefore, an actuator can be formed by a continuous member in a simple manner, wherein the various parts change their positions relative to each other under the action of a force in the X direction.

[0053] In an alternative embodiment of the present disclosure, the individual elements of the actuator are formed by mutually independent components connected to each other via hinge joints. Combinations of hinge joints and material parts with lower stiffness can also be used. If hinge joints are used, these joints are constructed so that they do not allow rotation of the mutually connected elements in normal operation. This can be achieved, for example, by locking or blocking elements that separate or destroy under a certain force in the X direction. In addition, the clamping force in the hinge can be selected to be correspondingly higher. Due to the force effect of the transmission housing, the clamping force is overcome and the two elements can be twisted relative to each other in the joint.

[0054] In the normal position, the actuator is thus firmly held and does not deform, which means that it does not wear substantially during operation of the vehicle and does not generate any undesirable noise. Under the action of a force in the transmission housing in the X direction, the actuator deforms and moves so that the force action in the X direction is converted into a force on the brake booster in the Z direction. The transmission housing then slides along the actuator and vice versa. The arrangement of the elements of the actuator is chosen so that the force on the brake booster generated by the actuator in the Z direction is high enough to change the position of the brake booster. This is not necessarily just a force in the Z direction; rather, the force of the actuator on the brake booster can also have a component in the X direction.

[0055] In a possible embodiment of the present disclosure, the pivot element has an inclined design that forms a contact surface for contacting the brake booster. To this end, the inclined portion of the pivot element has a reflection angle on the side facing the brake booster. If the actuator is pivoted in the direction of the brake booster, it contacts the brake booster via the contact surface and thereby pushes the brake booster away. The contact surface is designed to be correspondingly large. The area of ​​the actuator that contacts the transmission housing in the event of a head-on collision is preferably wide enough to produce sufficient overlap with the transmission in the Y direction to ensure reliable contact with the transmission housing. This area is also large enough and the actuator is stable enough in its support area on the vehicle component so that it can also compensate for the moment generated by the force along the side.

[0056] The brake booster together with the actuator and the fasteners of the brake booster on the vehicle component thus form a brake booster device that can be advantageously used in a motor vehicle. In the event of a frontal collision, the force of the transmission housing in the X direction can be converted by the device into a force in the Z direction, which advantageously pushes the brake booster upwards. The brake booster can be rotated or displaced here. A combination of both movements is also possible. The load path from the transmission housing to the brake booster in the X direction is thus advantageously interrupted. The deformation of the bulkhead is minimal, and the brake pedal and steering column are likewise not displaced or only slightly displaced in the direction of the passenger compartment. This increases the safety of the occupants in the event of a frontal collision.

[0057] Features of some exemplary embodiments are particularly suitable for use with large transmissions having large transmission housings, as are typically used in hybrid vehicles. They are also particularly suitable for use with electric brake boosters, which are also used in hybrid vehicles. Due to the size and arrangement of these vehicle components, these exemplary embodiments can be used particularly advantageously, although it can also be used advantageously with other combinations of transmissions and modules (brake boosters, ESP modules, etc.) assembled on the bulkhead.

[0058] Another exemplary aspect of the present disclosure may include a motor vehicle having an embodiment of a brake booster device. This particularly relates to hybrid vehicles having a transmission that is designed to switch between electric drive and another drive type. For the purposes of the present disclosure, a frontal collision refers to any collision (i.e., an accident) in which a corresponding force component is generated.

[0059] refer to Figure 1 , the exemplary brake booster 10 is part of a brake booster arrangement having an actuator. In this example, the brake booster 10 is an electric brake booster. Figure 1 The view of φ shows a view of the brake booster 10 in the motor vehicle in the Y direction. The brake booster 10 is fastened to a bulkhead 30 of the motor vehicle and is connected in a known manner to the brake pedal and the brake system of the motor vehicle.

[0060] The brake booster 10 is mounted on the bulkhead 30 via at least one fastening point. By way of example, two fastening points 11 and 12 are shown one above the other, which are formed by a screw connection. To the right of the bulkhead 30, there is the vehicle interior with the driver's footwell. The bulkhead 30 is shown here only schematically and can be designed in a known manner.

[0061] The actuator 20 is mounted below the brake booster 10. The actuator is essentially formed by two pivoting elements 21 and 22 and a displacement element 23. The two pivoting elements 21, 22 protrude upward from a bulkhead 30 at a certain slope and are pivotably supported on this bulkhead 30 along rotation axes 25 and 26. The displacement element 23 connects the two pivoting elements 21, 22 to each other. The connection is designed to be realized in a jointed manner via corresponding rotation joints 27 and 28.

[0062] Corresponding reinforcement elements 31 and 32 are provided for mounting the pivot elements 21, 22 on the bulkhead 30. These reinforcement elements 31, 32 are firmly fixed to the bulkhead 30 via two or more threaded connections 33 and 34. The threaded connections 33, 34 are located in the immediate vicinity of the rotation axes 25, 26 of the pivot elements 21, 22. The rotation axes 25, 26 extend here in the Y direction. In this embodiment of the disclosure, the rotation axes 25, 26 are formed by material portions having a lower stiffness than the material of the reinforcement elements 32, 33 and the pivot elements 21, 22. As an example, these elements can be formed by a sheet metal profile which is bent or folded in the region of the rotation axes 25, 26. However, the material stiffness at these bending points is high enough to hold the actuator 20 in this position. In normal operation of the vehicle, as in Figure 1 As shown, the pivot elements 21 , 22 therefore protrude upwards from the bulkhead 30 at a certain slope.

[0063] In contrast, in this embodiment, the rotational joints 27 and 28 between the displacement element 23 and the pivot elements 21, 22 are formed by hinges. The actuator 20 is thus formed of three separate components. The first component forms the displacement element. The other two components form the pivot element and the reinforcement element, respectively, which are connected to each other via a material portion with lower stiffness. For example, Figure 2 An enlarged view of a schematically shown hinge 28 with anti-twist is shown. Here, the connecting element 23 and the pivot element 22 are mounted in the hinge in a joined manner by means of a screw 29. The axes of rotation of the rotary joints 27 and 28 also extend in the Y direction. So that the two elements 22, 23 cannot be twisted against each other during normal operation, a shear pin 80 is provided as a blocking device, which blocks the joint in this position. This shear pin 80 can, for example, be made of a plastic material which gives way under certain shear forces. For example, a polyamide, such as nylon, can be used here. If the displacement element 23 and the pivot element 22 are twisted relative to each other under the action of high forces, the shear pin 80 gives way and the blocking action is terminated.

[0064] Such high forces occur if the transmission housing 40 moves in the X direction towards the actuator 20 in the event of a frontal collision with the motor vehicle. Figure 1 The brake booster 10 with the actuator 20 is shown in normal operation of the relevant motor vehicle. In this example, the transmission housing 40 is arranged at a distance from the actuator 20. To simplify the illustration, only the side of the transmission housing 40 facing the brake booster 10 is shown. The front of the vehicle is located Figure 1 , which means that the transmission housing 40 moves toward the brake booster 10 in the event of a frontal collision on the vehicle.

[0065] The actuator 20 is mounted below the brake booster 20 so that its upper rotary joint 28 faces in the direction of the lower side of the brake booster 20. The upper pivot element 22 also has an inclined design in the area of ​​this rotary joint 28, thereby forming a contact surface 24 facing the brake booster 10. In normal operation of the motor vehicle, the rotary joint 28 and the contact surface 24 are in contact with the lower side of the brake booster 20 or are arranged to be slightly spaced apart from the lower side of the brake booster 20. The actuator 20 protrudes from the bulkhead 30 and is held in this position. The lower rotary joint 27 is closer to the transmission housing 40 than the upper rotary joint 28. Figure 1 In FIG. 1 , the horizontal spacing between the two rotating joints 27 and 28 is represented by B.

[0066] In the event of a frontal impact on the vehicle, the transmission housing moves towards the actuator 20 until it comes into contact with the actuator 20. In this position, Figure 3 The transmission housing in FIG. 1 is denoted by reference numeral 40 ′, while its initial position 40 is indicated by dashed lines. The first contact occurs at a first contact point 50 in the region of the lower rotary joint 27 or lower pivot element 21 of the actuator 20 . Figure 3 It is shown that the actuator 20 has already been pivoted slightly upwards along the rotation axes 25 , 26 and has already contacted the underside of the brake booster 10 . The contact surface 2 of the actuator 20 is in contact with the brake booster 10 .

[0067] In an exemplary, non-limiting embodiment, Figure 4 It can be seen that the transmission housing has moved further into position 40". Due to the force of the transmission housing 40", the actuator 20 has been pivoted upwards about the rotation axes 25, 26 in the direction of the brake booster 10, as indicated by the smaller rotation arrow. The elements of the actuator 20 have been folded here. The rotary joint 28 and the contact surface 24 have pushed the underside of the brake booster 10 upwards, thereby causing the brake booster 10 to rotate about the tilting axis 60 (larger rotation arrow). In contrast, the initial position of the brake booster 10 is shown by the dashed line. The same applies to the initial position of the actuator 20.

[0068] The tilt axis 60 extends in the Y direction and is located in the region of the bulkhead 30. It is further located in the region of the lower fastening point 12. In this position, the transmission housing 40" rests against the actuator 20 at the second contact point 51. In order to rotate the brake booster 10 about the tilt axis 60, the bulkhead 30 has already been deformed in the region of the brake booster 10 and has thus already given way in the direction of the passenger cabin. In contrast, the initial extent of the bulkhead 30 is shown by the dashed line. Furthermore, the rotation of the brake booster 10 can make it possible or require that the fastening points have already been separated or at least significantly deformed.

[0069] Therefore, the force of the transmission housing 40" in the X direction has been converted by the actuator 20 into a force in the Z direction on the brake booster 10. Figure 4 , the transmission housing 40" is shown in a position where the brake booster is twisted, i.e., in a position where twisted contact occurs with the actuator 20. In this position of the brake booster 10, the load path in the X direction between the transmission housing 40" and the brake booster 10 can be lifted. The transmission housing 40" can be moved under the brake booster 10, or the brake booster 10 can slide with its lower side along the upper side of the transmission housing 40".

[0070] Figure 5 Another exemplary non-embodiment is shown, in which the brake booster 10 is not rotated about the rotation axis by the actuator 20, but is displaced in the Z direction. After the first contact between the transmission housing and the actuator 20, the transmission housing 40'' moves into its position in which it contacts the actuator 20 at the third contact point 52 and is also pivoted about the rotation axes 25, 26 in the direction of the lower side of the brake booster 10 (smaller arrow). This third contact point 52 is located in the region of the lower pivot element 21. By contact with the rotary joint 28, the brake booster 10 has been displaced upwards in the Z direction (straight arrow) along the bulkhead 30. In contrast, the initial position of the brake booster 10 is shown by a dashed line. The same applies to the initial position of the actuator 20.

[0071] The force of the transmission housing 40'' in the X direction is also converted into a force on the brake booster 10 in the Z direction by the actuator 20, and in this position of the brake booster 10, the load path in the X direction between the transmission housing 40'' and the brake booster 10 is raised. The transmission housing 40'' can move under the brake booster 10, or the brake booster 10 can slide with its bottom side along the top side of the transmission housing 40''. Figure 5 , the transmission housing 40 ″′ is shown in a position where the brake booster is displaced, that is, in a position where the transmission housing 40 ″ is displaced in contact with the actuator 20 .

[0072] Due to the slope of the bulkhead 30, the displacement of the brake booster 10 also has a component in the X direction. However, it is important that the underside of the brake booster 10 is now located at a higher position than before. This could lead to or require that the fastening points have become disengaged or at least deformed significantly. In contrast, no significant deformation of the bulkhead would result. In order to ensure a controlled displacement of the brake booster 10 along the bulkhead 30, special fastening points can be formed, for example. In particular, this refers to threaded connections, which can change their position within the elongated hole due to a certain force in the longitudinal direction of the elongated hole.

[0073] As an example, Fig. 6A and 6BThis embodiment of a fastening point 12 with a longitudinal hole 70 is shown. The longitudinal hole 70 is located in the bulkhead, although it can also be located in the housing wall of the brake booster. In addition, the brake booster can be mounted on the bulkhead via a plurality of these fastening points. The inner contour of the longitudinal hole 70 has two lateral narrowings 71 and 72. Due to these narrowings, two hole regions 74 and 75 are formed in the longitudinal hole 70, and the longitudinal direction of the longitudinal hole 70 extends in the Z direction. The hole region 74 is therefore located below the hole region 75. The brake booster is connected to the bulkhead via a threaded connection 73, which is shown in a simplified manner. As shown in FIG. Fig. 6A As shown, after assembly of the brake booster, the threaded connection 73 is located in the lower bore region 74. In this state, the narrowings 71, 72 form a defined assembly position for the threaded connection 73.

[0074] If the brake booster is moved significantly upward in the Z direction by the force of the actuator, the threaded connection 73 is pushed against the narrowings 71, 72. These narrowings 71, 72 are deformed by a certain force or they are destroyed, and the threaded connection 73 is moved from the lower hole area 74 into the upper hole area 75. A controlled displacement of the brake booster along one or more longitudinal holes can thus be achieved.

[0075] Figure 4 and 5 The embodiments may also be combined such that the brake booster can be rotated and displaced in the Z direction by the actuator.

[0076] The above description is illustrative rather than restrictive in nature. Variations and modifications to the disclosed examples may become apparent to those skilled in the art without necessarily departing from the essence of the present disclosure. Therefore, the scope of legal protection afforded to the present disclosure can only be determined by studying the following claims.

Claims

1. A brake booster device, comprising: a brake booster, which is mounted on a vehicle component via at least one fastening point; and A deformable actuator formed by at least two pivoting elements and a displacement element, the two pivoting elements being mounted on the vehicle component at a distance from each other so that they can pivot about respective rotation axes extending in the Y direction, the displacement element being mounted in a joined manner between the two pivoting elements, wherein the deformable actuator is configured to pivot about the rotational axis of the two pivoting elements under the action of a force in the X direction generated by the transmission housing, whereby the deformable actuator applies a force in the Z direction to the brake booster, thereby changing the position of the brake booster, wherein the deformable actuator is mounted below the brake booster and applies an upward force in the Z direction to the brake booster during the pivoting; The X direction represents the longitudinal direction of the motor vehicle in the vehicle coordinate system, while the Z direction represents the vertical direction and the Y direction corresponds to the lateral direction of the vehicle. 2 . The brake booster device according to claim 1 , wherein the brake booster rotates about a tilt axis in the Y direction due to a force of the deformable actuator.

3. The brake booster device according to claim 2, wherein: The tilt axis is located at the fastening point of the brake booster on the vehicle component.

4. The brake booster device according to claim 1, wherein: The brake booster is displaced in the Z direction due to the force of the deformable actuator.

5. The brake booster device according to claim 1, wherein: The brake booster is displaced along the surface of the vehicle component where the at least one fastening point is provided.

6. The brake booster device according to claim 1, wherein: The pivoting element of the deformable actuator has an inclined design providing a contact surface with the brake booster.

7. The brake booster device according to claim 1, wherein: It also includes a plurality of rotation joints between the displacement element and the pivot element and / or a plurality of rotation axes between the pivot element and the vehicle component, wherein the rotation joints and / or the rotation axes are formed by a material portion having a lower stiffness than the pivot element and / or the displacement element.

8. The brake booster device according to claim 1, wherein: The at least one fastening point is formed by a longitudinal hole having two lateral narrowing portions, the longitudinal hole being divided into two mutually adjacent hole areas through the two lateral narrowing portions, wherein the longitudinal extent of the longitudinal hole extends in the Z direction, and when a force is applied to the brake booster along the Z direction, the threaded connection is moved from the first hole area to the second hole area by the widening of the lateral narrowing portions.

9. A method of operating a brake booster, comprising: A deformable actuator formed by pivoting at least two pivoting elements and a displacement element, wherein the two pivoting elements are mounted on a vehicle component at a distance from each other so that they can pivot about a rotation axis, and the displacement element is mounted between the two pivoting elements in an engaged manner and pivots about the rotation axis of the two pivoting elements in response to a force applied by a transmission housing in an X direction; and During the pivoting, applying a force to a brake booster mounted on the bulkhead using the deformable actuator in a Z direction to change a position of the brake booster mounted on the bulkhead; The X direction represents the longitudinal direction of the motor vehicle in the vehicle coordinate system, and the Z direction represents the vertical direction.

10. The method according to claim 9, wherein: The X direction is horizontal and the Z direction is vertical.

11. The method according to claim 9, wherein: A force is applied to the brake booster in the Z direction by the deformable actuator to displace the brake booster in the Z direction.

12. The method according to claim 9, wherein: The brake booster remains attached to the bulkhead while the position of the brake booster is changed by applying a force to the brake booster in the Z direction via the deformable actuator.

13. A brake booster device, comprising: a brake booster mounted on a vehicle component; and A deformable actuator that pivots in response to a force applied to the deformable actuator by a transmission housing to move the brake booster upward, the deformable actuator comprising at least two pivot elements spaced apart from each other and a shifter mounted in engagement between the at least two pivot elements.

14. The brake booster device according to claim 13, wherein: The at least two pivot elements are pivotably connected to the vehicle component such that they can pivot relative to the vehicle component about respective rotation axes extending in the Y direction; wherein the Y direction represents the transverse direction of the motor vehicle in a vehicle coordinate system.

15. The brake booster device according to claim 13, wherein: The force applied to the deformable actuator is a horizontal force in the X direction; wherein the X direction represents the longitudinal direction of the motor vehicle in the vehicle coordinate system.

16. The brake booster device according to claim 13, wherein: The vehicle component is a bulkhead.

17. The brake booster device according to claim 14, wherein: The brake booster rotates about a rotational axis in the Y direction in response to the upward movement of the deformable actuator.

18. The brake booster device according to claim 17, wherein: The brake booster slides upward relative to the vehicle component in response to the upward movement of the deformable actuator.

19. The brake booster device according to claim 17, wherein: The brake booster is displaced in the Z direction due to the force of the deformable actuator; wherein the Z direction represents the vertical direction of the motor vehicle in the vehicle coordinate system.

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