ELECTROHYDRAULIC BRAKE MODULE

Abstract

The present disclosure relates to an electrohydraulic brake module for a motor vehicle brake system, comprising a housing, a hydraulic module with a piston/cylinder arrangement for generating a hydraulic brake pressure, an electric motor for driving the piston/cylinder arrangement, and a transmission arrangement for mechanically transmitting a brake pedal deflection. Furthermore, the brake module comprises a sensor cluster. The brake module has a redundantly acting sensor system and mechanism.

Claims

1. An electrohydraulic brake module for a motor vehicle brake system, comprising a housing, a hydraulic module with a piston/cylinder arrangement for generating a hydraulic brake pressure, an electric motor for driving the piston/cylinder arrangement, a transmission arrangement for mechanically transmitting a brake pedal deflection, a pedal travel transducer arrangement which is coupled to the transmission arrangement and is guided or mounted in the housing, with a first mechanism element and a second mechanism element, a printed circuit board which is connected to the housing, with a sensor cluster which has a pedal travel sensor arrangement, the pedal travel transducer arrangement having a first pedal travel transducer, the pedal travel sensor arrangement having a first pedal travel sensor, the first pedal travel transducer and the first pedal travel sensor together forming a first pedal travel detection unit which electronically detects the brake pedal deflection during operation, the pedal travel transducer arrangement having a second pedal travel transducer, the pedal travel sensor arrangement having a second pedal travel sensor, the second pedal travel transducer and the second pedal travel sensor together forming a second pedal travel detection unit which electronically detects the brake pedal deflection during operation in a redundant manner with respect to the first pedal travel detection unit, the first mechanism element establishing a force flow between the transmission arrangement and the housing in the case of a brake pedal actuation, and the second mechanism element establishing a force flow between the transmission arrangement and the housing in a redundant manner with respect to the first mechanism element in the case of a brake pedal actuation.

2. The electrohydraulic brake module according to claim 1, wherein the pedal travel transducer arrangement comprises a guide element which is coupled to the transmission arrangement and which is operatively connected to the first and the second mechanism elements and establishes a force flow between the transmission arrangement and the housing.

3. The electrohydraulic brake module according to claim 2, wherein the guide element is guided such that it can be moved linearly in the housing, and supporting the first and the second pedal travel transducers, wherein the transmission arrangement has a thrust rod which is guided such that it can be moved linearly, acts on the guide element with a thrust force in the case of a brake pedal actuation, and is connected via a connecting point to the guide element in such a way that a thrust movement of the thrust rod can be forwarded into a linear movement of the guide element, and wherein the first and the second mechanism element in each case being a spring, which acts between the housing and the guide element with a restoring force which acts counter to the thrust force, wherein the springs are arranged in each case in such a way that their respective lines of action run parallel to a linear movement direction of the guide element.

4. The electrohydraulic brake module according to claim 3, wherein the first spring is prestressed in a rest position of the guide element.

5. The electrohydraulic brake module according to, claim 1, wherein the first pedal travel detection unit is a pedal travel detection unit which detects in accordance with an inductive sensor principle, and the second pedal travel detection unit is a pedal travel detection unit which detects in accordance with a Hall sensor principle.

6. The Electrohydraulic brake module according to claim 2, wherein the guide element is of annular configuration, with a gearwheel toothing system at least in sections, and being mounted rotatably in the housing, wherein the transmission arrangement has a push-pull rod which is guided such that it can be moved linearly, acts on the guide element alternatively with a thrust and pulling force in a case of a brake pedal actuation, and is connected via a connecting point to the guide element in such a way that a thrust movement of the push/pull rod is converted into a rotational movement of the guide element, wherein the first and the second mechanism element are in each case of wheel-shaped configuration, and being mounted in each case in a stationary and a rotatable manner in the housing by way of a cover element, wherein the first and the second mechanism element are positioned next to one another in the housing in such a way that they in each case form a gear mechanism, with the guide element of annular configuration and its gearwheel toothing system, and wherein the first mechanism element supports the first pedal travel transducer, and the second mechanism element supports the second pedal travel transducer.

7. The electrohydraulic brake module according to claim 6, wherein the connecting point being such that, together with the push/pull rod, forms a cross-slider crank mechanism, in which the annular guide element has a slotted guide and the push/pull rod has a pin which is guided in the slotted guide.

8. The electrohydraulic brake module according to claim 6, the first and the second pedal travel detection unit in each case being a pedal travel detection unit which detects in accordance with a magneto-resistive sensor principle.

9. An electrohydraulic brake module for a motor vehicle brake system, comprising: a housing, a hydraulic module with a piston/cylinder arrangement for generating a hydraulic brake pressure, an electric motor for driving the piston/cylinder arrangement, a transmission arrangement for mechanically transmitting a brake pedal deflection, a pedal travel transducer arrangement which is coupled to the transmission arrangement and is guided or mounted in the housing, with a first mechanism element and a second mechanism element, a printed circuit board which is connected to the housing, with a sensor cluster which has a pedal travel sensor arrangement, wherein the pedal travel transducer arrangement has a pedal travel transducer, the pedal travel sensor arrangement having a first pedal travel sensor, the pedal travel transducer and the first pedal travel sensor together forming a first pedal travel detection unit which electronically detects the brake pedal deflection during operation, the pedal travel sensor arrangement having a second pedal travel sensor, the pedal travel transducer and the second pedal travel sensor together forming a second pedal travel detection unit which electronically detects the brake pedal deflection in a redundant manner with respect to the first pedal travel detection unit during operation, wherein a first mechanism element establishes a force flow between the transmission arrangement and the housing in a case of a brake pedal actuation, and a second mechanism element establishing a force flow between the transmission arrangement and the housing in a redundant manner with respect to the first mechanism element in the case of a brake pedal actuation.

10. The electrohydraulic brake module according to claim 9, wherein the pedal travel transducer arrangement comprises a guide element which is coupled to the transmission arrangement, and which is operatively connected to the first and the second mechanism element and establishes a force flow between the transmission arrangement and the housing.

11. The electrohydraulic brake module according to claim 10, wherein the guide element is guided in the housing such that it can be moved linearly, the guide element supports the pedal travel transducer, the transmission arrangement having a thrust rod which is guided such that it can be moved linearly, act with a thrust force on the guide element in the case of a brake pedal actuation, and is connected via a connecting point to the guide element in such a way that a thrust movement of the thrust rod can be forwarded into a linear movement of the guide element, and the first and the second mechanism element in each case being a spring, which acts between the housing and the guide element with a restoring force which acts counter to the thrust force, the springs being arranged in each case in such a way that their respective lines of action run parallel to a linear movement direction of the guide element.

12. The electrohydraulic brake module according to claim 9, wherein the first and the second pedal travel detection unit in each case being a pedal travel detection unit which detects in accordance with a inductive sensor principle, or the first and the second pedal travel detection unit in each case being a pedal travel detection unit which detects in accordance with a Hall sensor principle and in the case of which the pedal travel transducer is a permanent bipolar magnet, or the first and the second pedal travel detection unit in each case being a pedal travel detection unit which detects in accordance with the Hall sensor principle and in the case of which the pedal travel transducer is a permanent multipolar magnet.

13. The electrohydraulic brake module according to claim 9, wherein the first and the second pedal travel detection unit in each case being a pedal travel detection unit which detects in accordance with a Hall sensor principle, and the pedal travel transducer being a permanent bipolar magnet, the first pedal travel sensor having two individual sensors which are arranged in a row in the movement direction of the pedal travel transducer arrangement, and it being possible for the first pedal travel sensor to detect a greater movement travel of the pedal travel transducer arrangement than the second pedal travel sensor.

14. An electrohydraulic brake module according to claim 1, wherein the electrohydraulic brake module having a rotor position transducer arrangement with a rotor position transducer, the sensor cluster having a rotor position sensor arrangement with a rotor position sensor, and the rotor position transducer and the rotor position sensor together forming a rotor position detection unit which detects in accordance with an inductive sensor principle, which rotor position detection unit electronically detects the rotor position of the rotor of the electric motor during operation.

15. The electrohydraulic brake module according to claim 14, wherein the rotor position sensor arrangement is arranged on a first side of the printed circuit board, and the pedal travel sensor arrangement and a microswitch being arranged on a second side of the printed circuit board opposite the first side.

16. The electrohydraulic brake module according to claim 15, wherein the sensor cluster comprises the microswitch with a switching lever, for activating the electrohydraulic brake module and/or other systems in a vehicle from a rest state and/or for activating a vehicle brake light, the microswitch being arranged on the second side.

17. The electrohydraulic brake module according to claim 1, wherein the electrohydraulic brake module, having an electronic interface for transmitting digital signals to an electronic control unit, for controlling the electric motor.

18. The electrohydraulic brake module according to claim 1, wherein the first and the second pedal travel detection units in each case are pedal travel detection units which detect in accordance with an inductive sensor principle.

19. The electrohydraulic brake module according to claim 1, wherein the first and the second pedal travel detection units in each case are pedal travel detection units which detect in accordance with a Hall sensor principle.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0038] Further features, advantages and possible applications of the present disclosure result from the following description of the exemplary arrangements and the diagrammatic figures. For the sake of clarity, all the illustrated elements in figure are not necessarily provided with a reference numeral. Corresponding elements or regions are then labelled at least in another figure, however, and the meaning can be gathered from there. Furthermore, identical reference numerals in the figures stand for identical or similar objects.

[0039] FIG. 1 shows the entire construction of an electrohydraulic brake module according to the disclosure,

[0040] FIG. 2 shows a sectional illustration of a hydraulic module; the piston/cylinder arrangement is merely indicated by way of a bordered region,

[0041] FIG. 3 shows the printed circuit board with the sensor cluster, and a pedal travel transducer arrangement in an indicated manner,

[0042] FIG. 4 perspectively shows one example of an arrangement of the guide element, and further elements,

[0043] FIG. 5 shows a parallel projection of a detail from FIG. 4,

[0044] FIG. 6 shows a parallel projection of a further example of an arrangement of the guide element, and further elements,

[0045] FIG. 7 shows the exemplary arrangement according to FIG. 6 in an exploded illustration,

[0046] FIG. 8 shows an exploded illustration of one variant of a first aspect of the disclosure,

[0047] FIG. 9 shows a block diagram of one variant of a first aspect of the disclosure,

[0048] FIG. 10 shows an exploded illustration of one variant of a first aspect of the disclosure,

[0049] FIG. 11 shows a block diagram of one variant of a first aspect of the disclosure,

[0050] FIG. 12 shows an exploded illustration of one variant of a second aspect of the disclosure,

[0051] FIG. 13 shows a block diagram of one variant of a second aspect of the disclosure,

[0052] FIG. 14 shows an exploded illustration of variants of the second aspect of the disclosure,

[0053] FIG. 15 shows a block diagram of one variant of a second aspect of the disclosure, and

[0054] FIG. 16 shows a block diagram of one variant of a second aspect of the disclosure.

DETAILED DESCRIPTION

[0055] FIGS. 1 to 3 illustrate by way of example the basic construction of an electrohydraulic brake module 1 (called a brake module in the following text) according to the disclosure with its basic constituent parts which are labelled by way of reference numerals. This basic construction is also found in the aspects and variants of the disclosure which are shown from FIG. 4, and/or applies to them. The brake module 1 has a hydraulic module 20 and an electric motor 2. The electric motor 2 is connected to the hydraulic module 20. The printed circuit board 40 which is shown in FIG. 3 is situated between the electric motor 2 and the hydraulic module 20 in a housing 10. The printed circuit board comprises a sensor cluster 50. The transmission arrangement 30 which is coupled to the pedal travel transducer arrangement 71 reaches into the housing 10. The piston/cylinder arrangement 21 for generating a hydraulic brake pressure is shown in FIG. 2 merely as a hatched region with a rectangular border. In one exemplary arrangement, the drive of the piston in order to build up pressure and in order to displace brake fluid takes place by a rotation/translation mechanism (not shown) which is a nut/spindle mechanism, for example a ball screw drive. This rotation/translation mechanism is connected between the electric motor 2 and the piston/cylinder arrangement 21.

[0056] FIGS. 4 and 5 show one example of a mechanical exemplary arrangement of the disclosure, in the case of which the pedal travel transducer arrangement 71 is guided linearly. In the following text, this possible exemplary arrangement is also called a linear guide configuration for improved readability. In the case of this configuration, the pedal travel transducer arrangement 71 comprises a guide element 90 which is configured as a slide and is guided in the housing such that it can be moved linearly, that is to say is guided translationally. This linear movement direction is labelled by “L” in FIG. 5. In order to achieve the guide function, the housing 10 has a guide channel 12, in which the guide element 90 is guided. The guide element 90 is coupled to the transmission arrangement 30 via a connecting point 34, and can correspondingly be moved linearly by way of the transmission arrangement 30. The transmission arrangement 30 comprises a thrust rod 31 with a head part 32. The guide element 90 has a receptacle 93 which receives the head part 32. The receptacle 93 and the head part 32 form the connecting point 34, and make a force and movement transmission between the thrust rod 31 and the guide element 90 possible. Two tension springs 80, 85 are installed in a prestressed state between the guide element 90 and the housing 10. The direction of action is oriented in each case parallel to the linear movement direction L, The tension springs are fastened by way of their holding eyes in each case to corresponding receiving pins 14, 94 of the housing 10 and the guide element 90. The tension spring 80 forms the first mechanism element 80, and the tension spring 85 forms the second mechanism element 85. In the case of a displacement of the guide element 90 which can be brought about by way of a brake pedal actuation and transmission of force by way of the thrust rod 31, the tension springs 80, 85 exert a resetting force R counter to the thrust force S on the guide element 90, In the prestressed state, the tension springs 80, 85 eliminate a possible play in the connecting point 34. This leads to reliable operation of the brake module 1. A play in the connecting point 34 can falsify the pedal travel detection in contrast. The tension springs 80, 85 act in such a way that the prestress and also the resetting action are achieved only by way of one of the tension springs 80, 85. Therefore, the tension springs are of redundant design, and one of the two tension springs forms a mechanism element with a redundant action. In the case of a failure, for example a spring fracture, of one of the two tension springs 80, 85, the correspondingly remaining intact tension spring assumes the full function. This leads to a reliable, safeguarded function of the brake module 1.

[0057] FIGS. 6 and 7 show a further example of a mechanical exemplary arrangement of the disclosure, in the case of which the pedal travel transducer arrangement 71 comprises a guide element 90′ which is configured as a ring and which is mounted in the housing 10 such that it can be moved rotationally. In the following text, on account of improved readability, this possible exemplary arrangement will also be called a rotary bearing configuration, A slotted guide 93′ in the form of a slot is made on a projection 91′ of the ring 90′. The transmission arrangement 30 comprises a push/pull rod 31′ which has a pin 32′ at its end, The pin 32′ is guided in the slotted guide 93′, with the result that the linear thrust or pulling movement of the push/pull rod 31′ is transformed into a rotational movement of the guide element 90′. This corresponds to the operating principle of a cross-slider crank mechanism. The ring 90′ has a gearwheel toothing system 92′ on its outer circumference. The gearwheel toothing system 92′ extends over at most 50% of the outer circumference 95′ of the ring 90′. Two gearwheels 80′, 85′ with in each case one external toothing system which form the first and the second mechanism element 80′, 85′ are likewise mounted rotatably in the housing 10, for example in a housing pocket 15′, Furthermore, a cover element 13′ fixes the position of the gearwheels 80′, 85′ in the housing 10. The gearwheels 80′, 85′ are positioned in such a way that they are in meshing engagement with the gearwheel toothing system 92′ of the ring 90′ and can be driven by way of the ring 90′. The gearwheels 80′, 85′ are arranged spaced apart from one another along the gearwheel toothing system 92′ of the ring 90′, with the result that they are driven at the same time in the case of a rotation of the ring 90′ but are in engagement in each case with a different region of the gearwheel toothing system 92′. Therefore, one of the two gearwheels 80′, 85′, that is to say of the two mechanism elements 80′, 85′ has a redundant effect, which brings about a reliable function of the brake module 1. The gearwheels 80′, 85′ in each case support a pedal travel transducer. As a result, a rotation of the gearwheels 80′, 85′ is transmitted to the respective pedal travel transducer, The pedal travel transducers with the above-described mechanism (ring 90′, gearwheels 80′, 85′) together form the pedal travel transducer arrangement 71 The gearwheel 80′ is a first gearwheel and supports the first pedal travel transducer 72. The gearwheel 85′ is a second gearwheel and supports a second pedal travel transducer 75.

[0058] FIGS. 8 and 9 show one variant of the first aspect of the disclosure. In the case of this variant, the above-described linear guide configuration comes into effect, The guide element 90 supports a first pedal travel transducer 72 and a second pedal travel transducer 75. The first pedal travel transducer 72 is a metal target, The second pedal travel transducer 75 is a permanent bipolar magnet. A printed circuit board 40 is attached on or in the housing 10, a first side 41 of the printed circuit board 40 facing the pedal travel transducer arrangement 71, and a second side 42 which lies opposite the first side 41 facing away from the pedal travel transducer arrangement 71. The printed circuit board 40 is encapsulated with respect to the surrounding area by way of a housing cover 11. The housing cover 11 therefore faces the first side 41 of the printed circuit board 40. A rotatable rotor position transducer arrangement 63 which is configured as a metal target is situated such that it is embedded partially rotationally movably into the outer side of the housing cover 11 or is positioned rotationally movably directly on the outer side of the housing cover 11. The rotor position transducer arrangement 63 comprises a plurality of rotor position transducers 64 which are formed from metal portions which are spaced apart from one another and are arranged in a star-shaped manner. In one exemplary arrangement, each have the shape of a circular ring sector. This construction of the rotor position transducer 64 with a corresponding sensor system ensures a precise and failsafe detection of the rotor position of the electric motor 2. The printed circuit board 40 has a sensor duster 50 which comprises a pedal travel sensor arrangement 51 and a rotor position sensor arrangement 61.

[0059] The rotor position sensor arrangement 61 is arranged on the first side 41 of the printed circuit board 40, and the pedal travel sensor arrangement 51 is arranged on the second side 42 of the printed circuit board 40. The rotor position sensor arrangement 61 has a rotor position sensor 62. The rotor position sensor 62 and the rotor position transducer 64 together form a rotor position detection unit 65 which operates in accordance with the inductive sensor principle. The rotor position sensor 62 correspondingly has transmitting and receiving coils. An integrated circuit belonging to the rotor position sensor 62 is contained on the printed circuit board 40.

[0060] The pedal travel sensor arrangement 51 has a first pedal travel sensor 52 and a second pedal travel sensor 55. The first pedal travel sensor 52 and the first pedal travel transducer 72 together form a first pedal travel detection unit 53 which operates in accordance with the inductive principle. The first pedal travel sensor 52 accordingly has transmitting and receiving coils. An integrated circuit belonging to the pedal travel sensor 52 is contained on the printed circuit board 40. The second pedal travel sensor 55 and the second pedal travel transducer 75 together form a second pedal travel detection unit 56 which operates in accordance with the Hall principle. The second pedal travel sensor 55 accordingly has an electrode arrangement for utilizing the Hall effect. An integrated circuit belonging to the pedal travel sensor 55 is contained on the printed circuit board 40. In this case, the pedal travel sensor 55 is formed by way of a plurality of (at least two) individual sensors 54, in order to detect a displacement of the second pedal travel transducer 75.

[0061] The second pedal travel detection unit 56 forms a unit, redundant with respect to the first pedal travel detection unit 53, for the detection of a pedal deflection. Therefore, the brake module 1 operates reliably even if the first pedal travel detection unit 53 should fail during operation. The brake module 1 can also be designed in such a way that the first pedal travel detection unit 53 operates in accordance with the Hall principle and the second pedal travel detection unit 56 operates in accordance with the inductive principle. In this case, the pedal travel detection unit which operates in accordance with the inductive principle would be the redundant unit.

[0062] Furthermore, the printed circuit board 40 has a microswitch with a roller lever 67, by way of which, for example, a brake light of an associated vehicle can be activated and deactivated, or one or more systems, for example, the electronic controller of the brake module 1, can be activated from a rest state. The connectors 48 in FIG. 9 provide the power supply and the grounding. The connectors 45 provide the interface for the output of measured signals. This interface may be configured as a digital interface. The digital interface provides functional reliability with a compact overall design. This results in satisfactory handling of the brake module 1. The first and the second pedal travel sensor 52, 55 are arranged next to one another, for example oriented at a spacing from one another in each case along parallel to the linear movement direction L of the guide element 90, with the result that they can detect a linear movement of the guide element 90 or of the pedal travel transducers 72, 75. The first pedal travel transducer 72 is correspondingly arranged in such a way that it moves along the first pedal travel sensor 52 in the case of a linear movement of the guide element 90, and the second pedal travel transducer 75 is arranged in such a way that it moves along the second pedal travel sensor 55 in the case of a linear movement of the guide element 90.

[0063] FIGS. 10 and 11 show a further variant of a first aspect of the disclosure. In the case of this variant, the above-described rotary bearing configuration comes into effect. The pedal travel transducer arrangement 71 comprises the first pedal travel transducer 72 and the second pedal travel transducer 75. The first pedal travel transducer 72 is arranged on the first gearwheel 80′ and is configured as a permanent magnet. The second pedal travel transducer 75 is arranged on the second gearwheel 85′ and is configured as a permanent magnet. The arrangement, the construction and the type of printed circuit board 40, connectors 45, 48, housing cover 11, microswitch 67, rotor position sensor arrangement 61 and rotor position transducer arrangement 63 and the method of operation of the rotor position detection unit 65 are identical to the variant described above on the basis of FIGS. 8 and 9, and have the same effects and advantages in relation thereto. The pedal travel sensor arrangement 51 has a first pedal travel sensor 52 and a second pedal travel sensor 55. The first pedal travel sensor 52 and the first pedal travel transducer 72 together form a first pedal travel detection unit 53 which operates in accordance with the magnetoresistive sensor principle. The first pedal travel sensor 52 has a corresponding construction. An integrated circuit belonging to the pedal travel sensor 52 is contained on the printed circuit board 40. The second pedal travel sensor 55 and the second pedal travel transducer 75 together form a second pedal travel detection unit 56 which operates in accordance with the magneto-resistive sensor principle. The second pedal travel sensor 55 has a corresponding construction. An integrated circuit belonging to the pedal travel sensor 55 is contained on the printed circuit board 40.

[0064] The second pedal travel detection unit 56 forms a unit, redundant with respect to the first pedal travel detection unit 53, for the detection of a pedal deflection. Therefore, the brake module 1 operates reliably even if the first pedal travel detection unit 53 should fail during operation. The brake module 1 can also be designed in such a way that the first pedal travel detection unit 53 is the redundant unit.

[0065] The first and the second pedal travel sensor 52, 55 are arranged on the printed circuit board 40 next to one another and at a spacing from one another in such a way that they can detect a rotation of the gear wheels 80′, 85′ or the pedal travel transducers 72, 75. That is to say, the first gearwheel 80′ is arranged together with the first pedal travel transducer 72 in such a way that its rotation can be detected by way of the first pedal travel sensor 52, and the second gearwheel 85′ is arranged together with the second pedal travel transducer 75 in such a way that its rotation can be detected by way of the second pedal travel sensor 55.

[0066] FIGS. 12 and 13 show one variant of a second aspect of the disclosure. In the case of this variant, the above-described linear guide configuration comes into effect. The guide element 90 supports a pedal travel transducer 172. The pedal travel transducer 172 is a metal target. The arrangement, the construction and the type of printed circuit board 40, connectors 45, 48, housing cover 11, microswitch 67, rotor position sensor arrangement 61 and rotor position transducer arrangement 63 and the method of operation of the rotor position detection unit 65 are identical to the variant described above on the basis of FIGS. 8 and 9, and have the same effects and advantages in relation thereto. The pedal travel sensor arrangement 51 has a first pedal travel sensor 52 and a second pedal travel sensor 55. The first pedal travel sensor 52 and the pedal travel transducer 172 together form a first pedal travel detection unit 153 which operates in accordance with the inductive principle. The first pedal travel sensor 52 accordingly has transmitting and receiving coils. An integrated circuit belonging to the pedal travel sensor 52 is contained on the printed circuit board 40. The second pedal travel sensor 55 and the pedal travel transducer 172 together form a second pedal travel detection unit 156 which operates in accordance with the inductive principle. The first pedal travel sensor 52 accordingly has transmitting and receiving coils, An integrated circuit belonging to the pedal travel sensor 52 is contained on the printed circuit board 40. The second pedal travel detection unit 156 forms a unit, redundant with respect to the first pedal travel detection unit 153, for the detection of a pedal deflection. Therefore, the brake module 1 operates reliably even if the first pedal travel detection unit 153 should fail during operation. The brake module 1 can also be designed in such a way that the first pedal travel detection unit 153 is the redundant unit.

[0067] The first and the second pedal travel sensor 52, 55 are arranged next to one another, for example orientated at a spacing from one another in each case along parallel to the linear movement direction L of the guide element 90, with the result that they can detect a linear movement of the guide element 90 or of the pedal travel transducer 172. Correspondingly, the pedal travel transducer 172 is arranged in such a way that it moves along the first pedal travel sensor 52 and the second pedal travel sensor 55 in the case of a linear movement of the guide element 90. The pedal travel transducer 172 is correspondingly so wide that it covers the two pedal travel sensors 52, 55.

[0068] FIGS. 14, 15 and 16 show further variants of the second aspect of the disclosure, The variant, in the case of which the pedal travel transducer arrangement 71 is labelled by a) in FIG. 14, is assigned to the block diagram of FIG. 15. The variant, in the case of which the pedal travel transducer arrangement 71 is labelled by b) in FIG. 14, is assigned to the block diagram of FIG. 16.

[0069] In the case of the two variants FIG. 14 a) with FIG. 15 and FIG. 14 b) with FIG. 16, the above-described linear guide configuration comes into effect. In the case of the two variants, the arrangement, the construction and the type of printed circuit board 40, connectors 45, 48, housing cover 11, microswitch 67, rotor position sensor arrangement 61 and rotor position transducer arrangement 63 and the method of operation of the rotor position detection unit 65 are also identical to the variant described above on the basis of FIGS. 8 and 9, and have the same effects and advantages in relation thereto.

[0070] In the case of the variant FIG. 14 a) with FIG. 15, the guide element 90 supports a pedal travel transducer 172. The pedal travel transducer 172 is a permanent bipolar magnet. The pedal travel sensor arrangement 51 has a first pedal travel sensor 52 and a second pedal travel sensor 55. The sensors are arranged so as to follow one another along a parallel with respect to the linear movement direction L of the guide element. The first pedal travel sensor 55 is formed from two individual sensors 54.1 and 54.2 which are arranged along the parallel at a spacing from one another. The second pedal travel sensor is arranged between the individual sensors 54.1 and 54.2. In the direction of the thrust force S, first of all the individual sensor 54.1 is situated on the printed circuit board 40, and immediately following this is arranged the second pedal travel sensor 55. The individual sensor 54.2 is arranged at a spacing from the second pedal travel sensor 55.

[0071] The first pedal travel sensor 52 and the pedal travel transducer 172 together form a first pedal travel detection unit 153 which operates in accordance with the Hall principle. The first pedal travel sensor 52, that is to say the individual sensors 54.1 and 54.2, accordingly has in each case an electrode arrangement for utilizing the Hall effect. An integrated circuit belonging to the pedal travel sensor 52 is contained on the printed circuit board 40.

[0072] The second pedal travel sensor 55 and the pedal travel transducer 172 together form a second pedal travel detection unit 156 which operates in accordance with the Hall effect. The second pedal travel sensor 55 accordingly has an electrode arrangement for utilizing the Hall effect. An integrated circuit belonging to the pedal travel sensor 55 is contained on the printed circuit board 40. The second pedal travel detection unit 156 forms a unit, redundant with respect to the first pedal travel detection unit 153, for the detection of a pedal deflection. Therefore, the brake module 1 operates reliably even if the first pedal travel detection unit 153 should fail during operation. A greater detection travel results for the first pedal travel detection unit 153 as a result of the two individual sensors 54.1 and 54.2 which are spaced apart from one another than in the case of the second redundant pedal travel detection unit 156. The detection travel of the first pedal travel detection unit 153 depicts a great brake pedal deflection and ensure satisfactory handling of the brake module 1, since the brakes can be actuated in a finely metered manner by way of a great brake pedal travel. The redundant pedal travel detection unit 156 forms a smaller detection travel which is sufficient as redundancy function, however. The number of parts is reduced by way of the restriction to a second sensor which is not formed from a plurality of individual sensors, which has a favourable effect on production costs and handling capability.

[0073] In the case of the variant FIG. 14 b) with FIG. 16, the guide element 90 supports a pedal travel transducer 172. The pedal travel transducer 172 is a permanent multipolar magnet. The pedal travel sensor arrangement 51 has a first pedal travel sensor 52 and a second pedal travel sensor 55. The two pedal travel sensors 52 and 55 are arranged spaced apart from one another on the printed circuit board 40 in such a way that the pedal travel transducer can be guided between them along the linear movement direction L of the guide element. The poll pairs which are arranged multiple times behind one another on the pedal travel transducer 172 provide the magnetic field signals for the detection of the brake pedal deflection, which magnetic field signals can be detected by the pedal travel sensors. The first pedal travel sensor 52 and the pedal travel transducer 172 together form a first pedal travel detection unit 153 which operates in accordance with the Hall principle. The second pedal travel sensor 55 and the pedal travel transducer 172 together form a second pedal travel detection unit 156 which operates in accordance with the Hall principle. The second pedal travel detection unit 156 forms a unit, redundant with respect to the first pedal travel detection unit 153, for the detection of a pedal deflection. Therefore, the brake module 1 operates reliably even if the first pedal travel detection unit 153 should fail during operation.