Brake dust particle filter, disc brake arrangement and use of a brake dust particle filter

Abstract

Brake dust particle filter (110) for a disc brake assembly (100) with a brake disc (2) and a brake caliper (4), wherein the brake dust particle filter (110) comprises: a filter housing (101) with at least one housing wall (111A, 111B, 112); and a filter material (114) for receiving brake dust particles, which is arranged in the filter housing (101) and has at least one fold (115, 115', 115") projecting from the housing wall (111A, 111B, 112), wherein a fold height (H1 - H4) and / or a fold width (W1, W2) of the at least one fold (115, 115', 115") changes along the longitudinal extent (LE) of the fold (115, 115', 115").

Description

Technical field

[0001] The present invention relates to a brake dust particle filter suitable for retaining particles generated during braking by abrasion on a brake disc and / or brake pads. Furthermore, a disc brake assembly, particularly for a motor vehicle, with a brake dust particle filter is proposed. The use of a brake dust particle filter is also proposed. State of the art

[0002] Brake dust particle filters with ring-segment-shaped filter housings and uniformly shaped, inwardly projecting tongues to support the filter medium used are known from WO 2019 / 048374. Disclosure of the invention

[0003] It is an object of the invention to provide improved measures for reducing brake dust emissions from disc brake arrangements.

[0004] Based on a first aspect, a brake dust particle filter is proposed for a disc brake assembly with one brake disc and one brake caliper. The brake dust particle filter includes: a filter housing with at least one housing wall; and a filter material for capturing brake dust particles, which is arranged in the filter housing and has at least one fold projecting from the housing wall, wherein a fold height and / or a fold width of the at least one fold changes along its longitudinal extent.

[0005] By varying the pleat height and / or width, the pleat geometry can be adapted to the environment and / or the available installation space. Optimizing the use of installation space is particularly desirable, as a brake dust particle filter with a larger internal volume can retain more particles.

[0006] The pleat allows the airflow at the brake disc to be redirected within the brake dust particle filter. Specifically, the pleat directs the air containing the brake dust particles towards the housing wall, thus keeping the air in the filter housing for a longer time and increasing the separation efficiency.

[0007] Forming a pleat inside the filter housing is particularly advantageous because it increases the effective filter area. This allows brake dust emissions to be reduced efficiently.

[0008] The filter housing used in the brake dust particle filter can, in various embodiments, be a ring-segment-shaped, for example, banana-shaped or helmet-shaped filter housing. The interior of the filter housing can face the brake disc. The interior extends, in particular, between the brake disc and the housing wall. The pleat extends, for example, within the interior of the filter housing. The pleat can be arranged between the housing wall and the brake disc. One tip of the pleat can be located opposite the brake disc. The pleat can be formed solely by the filter material. In this case, the pleat can be held in place by the inherent rigidity of the filter material. Where the pleat is absent, the filter material can rest against the housing wall and, in particular, extend parallel to the housing wall.

[0009] The fold height extends, for example, from the fold base, where the fold projects from the housing wall, to the fold apex. The apex can be the part of the fold furthest from the housing wall. The fold base can be the part of the fold closest to the housing wall. The longitudinal direction is, in particular, parallel to the fold base and / or the fold apex. The fact that the fold height changes along the longitudinal direction means, for example, that the fold height is not constant along the entire longitudinal direction of the fold, but is greater or smaller in some places. In particular, the change in fold height along the longitudinal direction is constant.

[0010] The fold width can also refer to the distance between two fold arms at the fold base. The fact that the fold width changes along the longitudinal direction means, for example, that the fold width is not constant along the entire longitudinal direction of the fold, but is larger or smaller in some places. This means, in particular, that the angle between the two fold arms changes along the longitudinal direction. Specifically, the change in the fold width along the longitudinal direction is constant.

[0011] The pleat allows air laden with brake dust particles to be redirected and slowed down. This enables the brake dust particles to be deposited inside the filter housing and not released into the environment. The filter material can be made of a filter medium. The filter material is typically flat and arranged inside the brake dust particle filter, forming at least one pleat. The filter material can be a single piece and encompass the pleat.

[0012] The filter medium and / or filter material can be made of a material that can withstand the relatively high temperatures encountered during disc braking. The filter medium is particularly suitable for binding or retaining brake dust particles.

[0013] The filter medium can comprise a sheet material containing metal fibers, glass ceramics, and / or temperature-resistant plastics. Preferably, the filter material used is resistant to typical operating temperatures of disc brake assemblies, for example, between -20°C and 700°C. Metal fiber fleeces are known to be suitable as filter materials. The proposed brake dust particle filter is suitable for any disc brake application. It can be used for stationary or mobile applications. Mobile applications include, for example, motor vehicles such as cars, trucks, buses, rail vehicles, and the like. Stationary applications include shaft brakes, such as those used in wind or hydroelectric power plants, which can be equipped with appropriate brake dust particle filters.

[0014] According to one embodiment, the longitudinal extent of the at least one fold runs radially along the housing wall or at an acute angle to the radial direction.

[0015] The radial direction refers in particular to a radial direction of the brake dust particle filter in the mounted state, in which the brake dust particle filter accommodates the brake disc.

[0016] According to another embodiment, the filter material has a filter material surface that extends at least partially along the housing wall, with the fold protruding from the filter material surface.

[0017] The filter material surface can be in contact with the housing wall and / or extend parallel to the housing wall. It is also possible to provide a gap between the filter material surface and the housing wall, creating a chamber for air intake.

[0018] According to another embodiment, the fold height of the fold is a distance between a fold tip and a fold base of the fold and / or the fold width is a distance between two fold legs of the fold at the fold base.

[0019] The fold height extends, for example, from the fold base, where the fold projects from the housing wall, to the fold tip. The fold tip can be the part of the fold furthest from the housing wall. The fold base can be the part of the fold closest to the housing wall. The longitudinal direction is, in particular, parallel to the fold base and / or the fold tip. The fact that the fold height changes along the longitudinal direction means, for example, that the fold height is not constant along the entire longitudinal direction of the fold, but is greater or smaller in some places.

[0020] The fold width can also refer to the distance between two fold arms at the base of the fold. The fact that the fold width changes along the longitudinal direction means, for example, that the fold width is not constant along the entire length of the fold, but is larger or smaller in some places. This means, in particular, that the angle between the two fold arms changes along the longitudinal direction.

[0021] According to another embodiment, the filter housing further comprises: a first side wall and a second opposite side wall, which are coupled to each other by means of a circumferential wall section and / or an end wall, wherein an interior space of the filter housing extends between the side walls, the circumferential wall section and / or the end wall; the housing wall is designed as the first side wall, the second side wall or the circumferential wall section; and wherein the fold extends from the housing wall into the interior of the filter housing.

[0022] In embodiments of the brake dust particle filter, the filter housing is designed to enclose the brake disc between the side walls via a ring segment section. In the installed state of the brake dust particle filter, a friction surface of the brake disc runs between the side walls. It can be said that the side walls run essentially parallel to each other. In the installed state, the circumferential wall section can be positioned opposite a circumferential edge of the brake disc.

[0023] The resulting ring segment section can, for example, encompass an angular range of 90° or more. In some embodiments, the ring segment angle ranges from 40° to 270°. To make optimal use of the available space, particularly in automotive brake systems, ring segment angles between 45° and 180° have proven suitable. Suitable embodiments include, in particular, an angular range of 70° to 130°, preferably 80° to 120°.

[0024] According to a further embodiment, the pleat tip of the pleat projecting from the filter material surface arranged on the first side wall is arranged opposite the second side wall and the brake dust particle filter is designed to accommodate the brake disc between the pleat tip and the second side wall.

[0025] According to another embodiment, the fold height changes in a radial direction towards the circumferential wall; in particular, it can be provided that the fold height increases in the radial direction towards the circumferential wall. In other embodiments, the fold height can also decrease in the radial direction towards the circumferential wall or even increase and decrease multiple times.

[0026] In an alternative embodiment, the fold height decreases in a radial direction towards the circumferential wall.

[0027] According to another embodiment, the fold is formed integrally with the filter material surface from which it extends.

[0028] One-piece means specifically single-component, made from a single component. This one-piece design reduces the manufacturing effort required for the pleat and / or the filter material.

[0029] According to another embodiment, several folds extend from the filter material surface. The folds are arranged adjacent to each other, particularly in a circumferential direction.

[0030] Multiple pleats can extend from the same housing wall into the interior. The pleats, particularly their crests and / or bases, can be arranged parallel to one another. Multiple pleats can have identical dimensions, especially identical pleat heights, widths, and / or longitudinal lengths. However, the pleats can also have different dimensions, for example, to optimize airflow within the brake dust particle filter and / or to adapt the pleat dimensions to the available space. Multiple pleats are particularly advantageous because they multiply the effects of a single pleat.

[0031] For example, two adjacent folds form a pair of folds with a V-shaped or U-shaped cross-section. The distance between the bases of the adjacent folds can decrease along the circumference.

[0032] According to another embodiment, the individual folds are at different angles to the filter material surface from which they extend.

[0033] Regardless of the pleat dimensions, some pleats can be oriented differently with respect to the filter material surface area. This allows for adaptation to the installation space and / or optimization of the airflow.

[0034] According to another embodiment, the angle between individual folds and the filter material surface in a mounting arrangement of the brake dust particle filter decreases in a predetermined direction of rotation during forward driving.

[0035] The predetermined direction of rotation during forward travel can also be referred to as the forward rotation direction or backward rotation direction. In particular, the difference between the obtuse angles of adjacent folds is constant.

[0036] According to another embodiment, the difference in fold height between the smallest fold height and the largest fold height of a single fold varies from one fold to the next.

[0037] In other words, different folds can have different fold height profiles.

[0038] According to a further embodiment, the difference in fold height of the individual folds in a mounting arrangement of the brake dust particle filter increases in a predetermined direction of rotation during forward driving.

[0039] In particular, the difference between the fold height differences of adjacent folds is constant.

[0040] According to another embodiment, the filter housing has at least one support wall that projects into the fold of the filter material and supports it.

[0041] The support wall can be made of the same material as the filter housing. It can be formed as a single unit with the filter housing, or alternatively, it can be attached to the filter housing. In particular, the support wall projects into the interior of the filter housing. The support wall can be designed as a flat support tongue. The filter material can be arranged on both sides of the support tongue to form the fold. The support wall can have a shape that corresponds to the shape of the fold. For example, the support wall may have a varying height and / or width along its length.

[0042] The support wall can serve to give the pleat additional stability. The support wall can be designed to be permeable to air, for example by having openings to allow airflow through the filter material in the pleat area and thus improve air filtration.

[0043] According to another embodiment, the fold extends from a filter material surface arranged on the first side wall, wherein the first side wall is arranged in a mounting arrangement of the brake dust particle filter on an outside of the vehicle.

[0044] The first side wall can be positioned further out on the vehicle than the second side wall.

[0045] According to another embodiment, the fold is positioned at an angle to the filter material surface in such a way that a pocket for receiving air containing brake dust particles is formed between the fold and the filter material surface.

[0046] The pocket is formed, for example, by an acute angle between the fold and the filter material surface. This pocket creates a kind of open chamber into which air laden with brake dust particles can flow and be slowed down. This allows the brake dust particles to settle inside the filter housing, particularly in the chamber, and prevents them from escaping into the environment.

[0047] According to a second aspect, a disc brake arrangement is proposed comprising a brake disc, a brake caliper and a brake dust particle filter according to the first aspect or according to an embodiment of the first aspect, wherein the filter housing covers a friction surface of the brake disc in a radial direction.

[0048] The brake disc assembly can also include one or more brake pads mounted on the brake caliper. During braking, brake dust particles are generated primarily on the friction surface and on the brake pads acting against it. Therefore, the brake dust particle filter, with its filter housing, is positioned as close as possible to the brake caliper on its open side. This results, for example, in a mounting situation where the circumferential wall section runs opposite a brake disc's circumferential edge.

[0049] In some embodiments, the disc brake assembly features an internally ventilated brake disc. An internally ventilated brake disc has a brake disc edge with radial outlet openings. Air channels run inside the brake disc to cool it, so that the heated cooling air exits the outlet openings essentially radially. It can be advantageous to make the circumferential wall airtight relative to the brake disc edge (in the case of externally ventilated brake discs) or relative to the radial outlet openings.

[0050] In certain embodiments of the disc brake assembly, one of the side walls, both side walls, and / or the circumferential wall section is designed to be airtight. In other variants, external exhaust openings are provided on one side wall, the end wall, and / or the circumferential wall section.

[0051] According to a third aspect, the use of a brake dust particle filter according to the first aspect or according to an embodiment of the first aspect is proposed for filtering air flowing along a rotating brake disc.

[0052] The use of brake dust particulate filters is particularly suitable for motor vehicles in urban traffic. Disc brake systems in electric or hybrid vehicles, as well as in vehicles with combustion engines, are all suitable. Brake dust particulate filters can also be used in or on disc brake systems of rail vehicles, such as trains or trams.

[0053] Finally, a method for filtering air laden with brake dust particles in or on a disc brake assembly is proposed. In a disc brake assembly, the brake disc is rotatable in one direction and is gripped on both sides of its friction surface by a brake caliper. Furthermore, at least one brake lining is present.

[0054] Furthermore, the invention relates to a vehicle with a proposed disc brake arrangement.

[0055] The characteristics described for the brake dust particle filter apply accordingly to the disc brake arrangement as well as to the use of the brake dust particle filter, the filtering process and the vehicle.

[0056] Other possible implementations of the invention also include combinations of features or process steps described previously or subsequently with regard to the exemplary embodiments, even if not explicitly mentioned. In such cases, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the invention.

[0057] Further embodiments of the invention are the subject of the dependent claims and the exemplary embodiments of the invention described below. The invention will be explained in more detail below with reference to exemplary embodiments and the accompanying figures. List of characters

[0058] It shows: Fig. 1 a perspective view of an embodiment of a disc brake arrangement; Fig. 2 a side view of the disc brake arrangement according to Fig. 1; Fig. 3 a side view of the disc brake arrangement according to Fig. 1; Fig. 4 another side view of the disc brake arrangement according to Fig. 1; Fig. 5 a side view of an embodiment of a filter housing of a brake dust particle filter for a disc brake assembly according to Fig. 1-4; Fig. 6 a perspective view of the filter housing according to Fig. 5; Fig. 7 a perspective view of an embodiment of a brake dust particle filter for a disc brake assembly; Fig. 8 a sectional view of the brake dust particle filter according to Fig. 7; Fig. 9 a perspective view of a side wall of the brake dust particle filter according to Fig. 7; Fig. 10 a perspective view of a fold of the brake dust particle filter according to Fig. 7; Fig. 11 a top view of the fold of the Fig. 10; Fig. 12 a perspective view of a circumferential wall of the brake dust particle filter according to Fig. 7; and Fig. 13 a perspective view of a side wall of another embodiment of a brake dust particle filter for a disc brake arrangement.

[0059] In the figures, identical or functionally equivalent elements have been provided with the same reference symbols unless otherwise indicated. embodiment(s) of the invention

[0060] In Fig. 1, Fig. 2, Fig. 3 and Fig. Figure 4 shows different views of an embodiment of a disc brake assembly, for example for a motor vehicle. Fig. 1. A perspective view of the disc brake arrangement 100 , in Fig. 2 a side view and in Fig. 3 and Fig. 4 side views perpendicular to the axis of rotation A shown.

[0061] The disc brake arrangement 100 includes a brake disc 2 , which in the illustrated embodiment is equipped with internal ventilation. The brake disc 2 has a radially internal mounting plate 2E , the mounting holes 2F features. Each figure has only one opening. 2F Labeled with reference numbers. Above the mounting plate 2E and the mounting holes 2F will the brake disc 2 Attached to the wheel suspension using suitable fasteners, such as wheel bolts, so that a rotationally secure connection to the vehicle wheel or rims (not shown here) is created. At the circumferential edge of the brake disc 2D (cf.) Fig. 3) Radially outward directed outlet openings can be identified 2C From the outlet openings2C During operation of the brake, which is in the direction of rotation, water flows R rotates, air is used to cool the brake discs 2 For the sake of simplicity, the following discussion will consider a braking process during forward travel. However, the direction of rotation can also be reversed.

[0062] The figures show a forward direction of rotation. R The direction is indicated counterclockwise. This will subsequently be referred to as the forward direction of rotation. R designated. The axis of rotation A can be recognized in Fig. 2, Fig. 3 and Fig. 4. Due to the orientation of the brake disc 2 This results in an axial extension direction. AX (cf.) Fig. 1, Fig. 3 and Fig. 4), a radial direction of extension RX (cf.) Fig. 3) and a comprehensive direction of extension CX (cf.) Fig. 2).

[0063] In Fig. 2 is essentially an installation situation for the brake disc 2 and one the brake disc 2 wraparound brake caliper 4 indicated. The brake caliper 4 is attached to a brake caliper bracket 3 coupled, which also includes the brake disc 2 encompasses. On the brake caliper 4 are on both sides of the brake disc 2 brake pads 5 arranged, which are equipped with a brake hydraulic system 8 (cf.) Fig. 3, Fig. 4) during the braking process on the friction surfaces 2A , 2B be pressed.

[0064] The brake caliper bracket 3 as well as the brake caliper 4 are mounted on a floating bearing 9 from a brake caliper carrier 6 held. By means of a floating bearing. 9 The brake caliper is automatically centered. 4 with the brake pads 5 related to the brake disc 2, which are located between the gripping arms of the brake caliper 4 or the two brake pads 5 lies. In the illustrated embodiment, the brake caliper 4 forward direction F in front of the axis of rotation A arranged. Variants are also conceivable in which the brake caliper 4 behind the axle A is planned.

[0065] Since the brake pads are used during braking 5 on the friction surfaces 2A , 2B the brake disc 2 Pressing the brakes causes abrasion on the brake pads. 5 and basically also on the brake disc 2 Some of these brake dust particles are removed by the rotation. R of the brake disc in the circumferential direction CX Carried away with it. Therefore, a brake dust particle filter is needed to capture this brake dust or brake dust particles. 1 in the direction of rotation R after the brake caliper 4Provided. Detailed side views and perspective drawings of the filter housing. 10 the brake dust particle filter 1 are in Fig. 5 and Fig. 6 reproduced.

[0066] The case 10 the brake dust particle filter 1 encompasses an area of ​​the brake disc 2 Essentially ring-segment shaped. The brake dust particle filter also features... 1 a case 10 up. The case 10 has two opposite side walls 11A , 11B , which have an outer perimeter wall 12 (Perimeter wall section) are connected to each other to form an approximately U-shaped cross-section. In the orientation of the Fig. 1, Fig. 3 and Fig. 4 results in an outer side wall 11A , which, when installed, points away from the vehicle. The opposite side wall 11B (in the orientation of Fig. 3 and Fig. 4 (right side) is used as the inner side wall 11B It is called that because it points towards the inside of the vehicle. The brake disc 2 between the two side walls 11A , 11B It is therefore partially enclosed.

[0067] In the radial direction opposite the circumferential wall 12 inner perimeter wall sections run 13A , 13B The outer, radially inner, and axially outer circumferential wall section is designated 13A. The radially inner and axially inner circumferential wall section is designated 13B.

[0068] The filter housing 10 has to the brake caliper 4 to an edge with a connecting contour 14 , so that between the brake caliper 4 and the housing edge or connection contour 14 a gap 15 is present. The case edge 14 forms a brake caliper-side opening of the filter housing 10 The filter housing10 extends in the circumferential direction CX from the connection contour or an open side 14 of the case 10 up to an end wall 16 The front wall 16 connects the outer side wall 11A , the outer perimeter wall 12 and the inner side wall 11B together. Between the inner perimeter wall sections 13A , 13B There is a ring-shaped slit 17 before, into which the brake disc 2 with its brake disc edge 2D can be inserted. The housing walls 11A , 11B , 12 , 13A , 13B , 16 enclose an interior housing 20 . Inside the housing 20 The brake disc penetrates 2 a or the filter housing 10 surrounds or encompasses a ring segment of the brake disc 2 The filter housing 10or components in the brake dust particle filter 1 touch the brake disc 2 not.

[0069] In Fig. 5 are possible dimensions of the filter housing. 10 illustrated. Fig. Figure 5 shows a side view from the outside of the disc brake assembly. 100 in the axial direction. It can be seen that the side walls, especially those in Fig. 5 visible outer side wall 11A , has a ring segment shape. The filter housing 10 is from the axis of rotation A seen radially inside through the inner circumferential wall sections 13A , 13B (not shown) bounded and radially outside by the outer circumferential wall 12 An inner radius can be formed in this process. RI through the distance between the inner circumferential wall sections 13A , 13B result and an outer radius RO due to the distance of the perimeter wall 12 from the axis of rotation AThe difference in radii RO - RI can be considered height H of the filter housing 10 The length of the filter housing is determined by its extension along the circumference between the brake caliper. 4 open side facing 14 and the forehead 16 A width W of the filter housing 10 Its axial extent is determined by the distance between the two side walls. 11A , 11B (cf.) Fig. 4 and Fig. 6).

[0070] When operating the disc brake assembly 100 and the brake dust particle filter 11 is rotated R the brake disc 2 an airflow in the circumferential direction CX through the filter housing 10 along the direction of rotation R the brake disc 2 generated.

[0071] Inside 20 of the filter housing 10The particles can migrate along the flow path in the filter housing. 10 They are deposited onto the inner walls by adhesion forces or (not shown here) bound by suitable filter materials.

[0072] The filter housing 10 or the brake dust particle filter 1 is attached to the brake caliper bracket with a suitable fastener, for example a screw 3 attached. One can see in Fig. 3 and Fig. 6 Fasteners 19 .

[0073] The installation space in the area of ​​the disc brake assembly 100 This can influence the housing shape of the brake dust particle filter, especially in the case of a steered front axle of a vehicle. 1 have. For example, the filter housing has 10 axially on the inside, pointing towards the interior 20 of the filter housing 10 drawn area 18 between the front 16and the connecting contour 14 Therefore, the following results along the circumferential direction: CX a variable width of the cross-sectional area of ​​the filter housing 10 .

[0074] In Fig. 7 to Fig. 10 are some aspects of the filter housing used. 10 This section explains various designs of brake dust particle filters. The filter housings or brake dust particle filters shown below are intended for use in disc brake assemblies. 100 , as previously described, provided for. The reference symbols used below correspond to those to Fig. 1 to Fig. 6 explained elements of the disc brake assembly and the brake dust particle filter, with reference to the respective reference numerals 100 was added. For example, the side wall corresponds to 111A of the filter housing 101 out of Fig. 7 of the side wall 11A , as they are in Fig. 1 to Fig. 6 is named. Therefore, disc brake arrangements are shown that are equipped with brake dust particle filters. 101 are equipped according to the following figures.

[0075] Fig. Figure 7 shows a perspective view of an embodiment of a brake dust particle filter. 110 for the disc brake arrangement 100 The side walls 111A , 111B of the filter housing 101 the Fig. 7 are mainly arranged parallel to each other; in one of the brake calipers 4 The section facing away from the wall is a gap between the side walls. 111A , 111B However, it is increased in order to make optimal use of the available installation space.

[0076] As in Fig. Number 7 can be seen inside. 120 of the filter housing 101 Filter material 114 arranged. The filter material 114The filter medium consists of metal fibers bonded together with a binder. 114 It is formed over a flat area. It comprises a filter material surface. 116 , which are located inside 120 along the side walls 111A , 111B and the perimeter wall 112 extends. The filter material area 116 It lies flat against the walls. 111A , 111B , 112 and is particularly suitable for use with adhesive on walls 111A , 111B , 112 glued on. The filter material surface 116 extends along the entire walls 111A , 111B and 112 .

[0077] As in Fig. 7 and Fig. As can be seen, 8 are in the interior 120 Fold 115 , 115' formed from the filter material 114 are formed. The wrinkles 115 extend from the filter material surface 116essentially perpendicular to the filter material surface 116 In the embodiment of the Fig. 7, Fig. 8 are on the first side wall 111A as well as on the perimeter wall 112 two folds each 115 , 115' planned.

[0078] The wrinkles 115 , extending axially from the side wall 111A extend, will be based on the Fig. 9 to Fig. 11 described in more detail. Fig. 9 shows the side wall. 111A , on which the filter material surface is spread 116 is intended. The two folds 115 They are identically formed. Each one encompasses a fold tip. 117 , the two folds 119 connects them. In the assembled state and in the disc brake arrangement. 100 are the wrinkle tips 117 the wrinkles 115 the side wall 111A the friction surface 2Aarranged opposite each other. This results in the brake disc 2 between the second side wall 111B and the fold points 117 is arranged.

[0079] Every wrinkle 115 Each also includes two fold bases 118 , where the wrinkled thighs 119 with the filter material surface 116 are connected. The folds 115 the first side wall 111A are in the circumferential direction CX arranged side by side, spaced apart. The folds 115 extend along the radial direction RX and have a longitudinal extent LE The longitudinal extent LE corresponds to the entire radial extent of the side wall 111A .

[0080] Fig. 10 shows that a fold height of the folds 115 along the longitudinal extent LE varies. At one point in the circumference section 113A adjacent part of the fold115 (above in the representation of the Fig. 10), has the fold 115 a fold height H1 . On one of the perimeter walls 112 adjacent part of the fold 115 (below in the representation of the Fig. 10), has the fold 115 a fold height H2 , which differ from the fold height H1 differs. The fold height H1 is greater than the fold height H2 In the example of the Fig. 10 H1 is three times larger than H2.

[0081] Fig. 11 shows that furthermore a fold width of the folds 115 along the longitudinal extent LE varies. At one point in the circumference section 113A adjacent part of the fold 115 (above in the representation of the Fig. 11), has the fold 115 a fold width W1 . On one of the perimeter walls 112 adjacent part of the fold 115 (below in the representation of the Fig. 10), has the fold 115 a fold width W2 , which differ from the width of the folds W1 differs. The fold height W1 is greater than the fold height W2 In the example of the Fig. 10 means W1 is twice as large as W2.

[0082] The wrinkled thighs 119 are not at a right angle to the side wall 111A Rather, there is a fold between the brake caliper-side hinge. 119 (right thigh) 119 in the representation of Fig. 9 to Fig. 11) and the side wall 111A an acute angle θ , which here is 80°. This angle θ is located between the brake caliper-side folding arm 119 and the side wall 111A a bag 121 formed, in which the air to be filtered is taken in.

[0083] Fig. Figure 12 shows the perimeter wall 112 with the folds arranged on it 115 ,115' of the filter material 114 The wrinkles 115 the perimeter wall 112 extend radially from the circumferential wall 112 , so that their fold tips 117 essentially along the axial direction AX This occurs when the brakes are installed and in the disc brake configuration. 100 are the wrinkle tips 117 the wrinkles 115 , 115' the perimeter wall 112 the brake disc circumferential edge 2D arranged opposite each other.

[0084] The wrinkles 115 and 115' the perimeter wall 112 They differ from each other in the height of their folds. The fold 115 Regarding the dimensions and fold heights, I am familiar with the one associated with Fig. 10 and Fig. 11 described fold 115 identical. The fold 115' has different fold heights H3 , H4 : on the side of the second side wall 111B(left in the representation of the Fig. 12) is the fold height H3 higher than the fold height H2 on the side of the first side wall 111A (right in the representation of the Fig. 12) A fold height difference H1-H2 is greater than a fold height difference H3-H4 The pleat widths W1 , W2 the fold 115' are with those of the fold 115 identical.

[0085] The in Fig. 7 to Fig. 12 depicted folds 115 , 115' increase the effective filter area within the housing 101 The wrinkles 115 , 115' They have a geometry that allows for efficient guidance of the brake disc 2 air flowing around the filter housing, laden with particles 101 This enables the particles and air to be directed, in particular, towards the housing walls. 111A , 112 , of which the wrinkles 115 ,115' protrude, guided. Furthermore, the geometry of the folds enables 115 , 115' an optimization of construction space.

[0086] Fig. Figure 13 shows a perspective view of a side wall 111A' Another embodiment of a brake dust particle filter for a disc brake assembly. The side wall 111A' For example, instead of the side walls 11 A described above, or 111A be used.

[0087] The side wall 111A' differs from the side wall 111A because the wrinkles 115'' have a slightly different geometry. The folds 115'' the Fig. 13 of them have a longitudinal extent. LE , which do not extend the entire radial extent of the side wall 111A' It corresponds to, but only to a part. The fold 115'' extends into two-thirds of the side wall 111A' , which are closest to the perimeter section 113Alie (above in the representation of the Fig. 13).

[0088] Although the invention has been described here using preferred embodiments, it is by no means limited to these, but can be modified in many ways. The number and arrangement of the folds 115 , 115' , 115'' It can be modified at will. For example, only a single fold can be added. 115 inside 120 of the filter housing 101 be provided for. Furthermore, one or more than two folds may be provided. 115 on the side wall 111A and / or on the perimeter wall 112 It is also possible to create one or more folds on the second side wall. 111B to provide for. In addition, only one of the side walls can be used. 111A , 111B , only the perimeter wall 112 or just both side walls 111A , 111B one or more folds 115 exhibit.

[0089] Furthermore, the wrinkles can 115 , 115' , 115'' additionally by support elements of the filter housing 110 , which into the interior 120 and into the fold 115 , 115' , 115'' protrude, be supported.

[0090] The side walls 111A , 111B Alternatively, they can also be arranged parallel to each other, so that there is no varying distance between the side walls. 111A , 111B is available.

[0091] It is also conceivable to have embodiments in which only the fold width is determined. W1 , W2 or just the fold height H1 - H4 along the longitudinal extent LE a fold 115 , 115' , 115'' It varies. Generally, dimensions other than those described are also possible for the folds. 115 , 115' , 115'' conceivable. Reference symbol list 1 Brake dust particle filter 2 brake discs 2A, 2B Brake disc friction surface 2C Outlet 2D brake disc edge 2E Mounting plate 2F Mounting opening 3 brake caliper brackets 4 brake calipers 5 brake pads 6 brake caliper carriers 7 Brake line connection 8 Brake hydraulics 9 floating bearings 10 filter housings 11A (outer) side wall 11B (inner) side wall 12 (outer) perimeter wall section 13A (inner outer) perimeter wall section 13B (inner internal) perimeter wall section 14 Connection contour 15 columns 16 Front wall 17 slots 18 inwardly drawn housing area 19 Filter mounting 20 Housing interior 100 disc brake arrangement 101 filter housings 110 Brake dust particle filters 111A (outer) side wall 111A' (outer) side wall 111B (inner) side wall 112 (outer) perimeter wall section 113A (inner outer) perimeter wall section 113B (inner internal) perimeter wall section 114 filter material 115 folds 115' fold 115" fold 116 filter material area 117 pleats 118 Fold base 119 wrinkled thighs 120 interior 121 bags A axis of rotation AX axial extension direction CX comprehensive extension direction F Forward direction H height H1, H2 fold height H3, H4 fold height LE Longitudinal extent R Forward direction of rotation RI inner radius RO outer radius RX radial extension direction W width W1, W2 fold width θ angle QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] WO 2019 / 048374

[0002]

Claims

[1] Brake dust particle filter (110) for a disc brake assembly (100) with a brake disc (2) and a brake caliper (4), wherein the brake dust particle filter (110) comprises: a filter housing (101) with at least one housing wall (111A, 111B, 112); and a filter material (114) for receiving brake dust particles, which is arranged in the filter housing (101) and has at least one fold (115, 115', 115'') projecting from the housing wall (111A, 111B, 112), wherein a fold height (H1 - H4) and / or a fold width (W1, W2) of the at least one fold (115, 115', 115'') changes along its longitudinal extent (LE). [2] Brake dust particle filter (110) according to claim 1, wherein the longitudinal extent (LE) of the at least one fold (115, 115', 115'') extends in the radial direction (RX) along the housing wall (111A, 111B, 112) or extends at an acute angle to the radial direction (RX). [3] Brake dust particle filter (110) according to claim 1 or 2, wherein the filter material (114) has a filter material surface (116) which extends at least partially on the housing wall (111A, 111B, 112), and wherein the fold (115, 115', 115'') extends away from the filter material surface (116). [4] Brake dust particle filter (110) according to one of claims 1 to 3, wherein the pleat height (H1 - H4) of the pleat (115, 115', 115'') is a distance between a pleat tip (117) and a pleat base (118) of the pleat (115, 115', 115'') and / or the pleat width (W1, W2) is a distance between two pleat legs (119) of the pleat (115, 115', 115'') at the pleat base (118). [5] Brake dust particle filter (110) according to one of claims 1 to 4, wherein the filter housing (101) further comprises: a first side wall (111A) and a second opposite side wall (111B) which are coupled to each other by means of a circumferential wall section (112) and / or an end wall (116), wherein an interior space (20) of the filter housing (101) extends between the side walls (111A, 111B), the circumferential wall section (112) and / or the end wall (116); the housing wall (111A, 111B, 112) is configured as the first side wall (111A), the second side wall (111B) or the circumferential wall section (112); and wherein the fold (115, 115', 115'') extends from the housing wall (111A, 111B, 112) into the interior (120) of the filter housing (101). [6] Brake dust particle filter according to claims 4 and 5, wherein the pleat tip (117) of the pleat (115, 115', 115'') projecting from the filter material surface (116) arranged on the first side wall (111A) is arranged opposite the second side wall (111B) and the brake dust particle filter (110) is arranged to accommodate the brake disc between the pleat tip (117) and the second side wall (111B). [7] Brake dust particle filter according to claim 6, wherein the pleat height (H1 - H4) changes in a radial direction (RX) towards the circumferential wall (112), in particular increasing. [8] Brake dust particle filter according to any one of claims 3 to 7, wherein the fold (115, 115', 115'') is formed integrally with the filter material surface (116) from which it extends. [9] Brake dust particle filter according to any one of claims 1 to 8, wherein several folds (115, 115', 115'') extend from the filter material surface (116), and wherein in particular the folds (115, 115', 115'') are arranged adjacent to each other in a circumferential direction (CX). [10] Brake dust particle filter according to claim 9, wherein the individual pleats (115, 115', 115'') are at different angles (θ) to the filter material surface (116) from which they extend. [11] Brake dust particle filter according to claim 9 or 10, wherein an angle (θ) between individual pleats (115, 115', 115'') and the filter material surface (116) in a mounting arrangement of the brake dust particle filter (110) decreases in a predetermined direction of rotation during forward travel. [12] Brake dust particle filter according to one of claims 9 to 11, wherein a fold height difference between a minimum fold height (H2, H4) and a maximum fold height (H1, H3) of a single fold (115, 115', 115") varies from one fold (115, 115', 115") to the next. [13] Brake dust particle filter according to claim 12, wherein the fold height difference of the individual folds (115, 115', 115") in a mounting arrangement of the brake dust particle filter increases in a predetermined direction of rotation during forward driving. [14] Brake dust particle filter according to any one of claims 1 to 13, wherein the filter housing (101) has at least one support wall which projects into and supports the fold (115, 115', 115") of the filter material (114). [15] Brake dust particle filter according to any one of claims 5 to 14, wherein the fold (115, 115', 115") extends from a filter material surface (116) arranged on the first side wall (111 A), wherein the first side wall (111A) is arranged in a mounting arrangement of the brake dust particle filter (110) on an outside of the vehicle. [16] Brake dust particle filter according to one of claims 3 to 15, wherein the fold (115, 115', 115") is positioned at an angle to the filter material surface (116) such that a pocket (121) for receiving air containing brake dust particles is formed between the fold (115, 115', 115") and the filter material surface (116). [17] Disc brake assembly (100) comprising a brake disc (2), a brake caliper (4) and a brake dust particle filter (110) according to one of claims 1-16, wherein the filter housing (101) covers a friction surface of the brake disc (2) in the radial direction (RX). [18] Use of a brake dust particle filter (110) according to one of claims 1-16 for filtering air flowing along a rotating brake disc (2).

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