Hydraulic brake module for a vehicle, cooperating control device and method for operating a hydraulic brake module of a vehicle having a total of two hydraulic wheel brake cylinders

Abstract

The invention relates to a hydraulic brake module (10) for a vehicle, comprising an actuator device (16), by means of whose electric motor (16a) at least one linearly adjustable piston (16b) of the actuator device (16) or at least one pump piston of the actuator device (16) can be driven in such a way that a pressure in at least one partial volume (10a) of the hydraulic brake module (10) adjacent to the actuator device (16) can be increased by means of the at least one driven linearly adjustable piston (16b) or pump piston, and a total number of two hydraulic wheel brake cylinders (14a, 14b), of which a first hydraulic wheel brake cylinder (14a) is hydraulically connected to the partial volume (10a) of the hydraulic brake module (10) adjacent to the actuator device (16) via a first valve device (18a) and a second hydraulic wheel brake cylinder (14b) is hydraulically connected to the partial volume (10a) of the hydraulic brake module (10) adjacent to the actuator device (16) via a second valve device (18b).wherein the first valve device (18a) is a first pressure control valve (18a) and the second valve device (18b) is a second pressure control valve (18b).,

Description

[0001] The present invention relates to a hydraulic brake module for a vehicle and a cooperating control device for a vehicle. The invention also relates to a braking system for a vehicle. Furthermore, the invention relates to a method for operating a hydraulic brake module of a vehicle having a total of two hydraulic wheel brake cylinders and a method for braking a vehicle having four wheels. State of the art

[0002] DE 10 2020 206 911 A1 describes a braking device by means of which two wheels of an axle of a vehicle can be braked. The braking device has two hydraulic brake circuits, each equipped with a wheel brake cylinder, a motorized piston brake device, and a separating valve via which the respective wheel brake cylinder is hydraulically connected to the motorized piston brake device of the same brake circuit. The two brake circuits of the braking device are also hydraulically connected to each other via a hydraulic cross-connection with another separating valve. Disclosure of the invention

[0003] The present invention provides a hydraulic brake module for a vehicle having the features of claim 1, a control device for a vehicle having the features of claim 4, a brake system for a vehicle having the features of claim 6, a method for operating a hydraulic brake module of a vehicle having a total of two hydraulic wheel brake cylinders having the features of claim 10 and a method for braking a four-wheeled vehicle having the features of claim 11. Advantages of the invention

[0004] The present invention implements a hydraulic brake module on a vehicle with a significant reduction in components and complexity compared to the prior art. The present invention thus contributes to reducing the costs of equipping the vehicle with the hydraulic brake module. The present invention can therefore be used in particular to create cost-effective hybrid braking systems / hybrid brake control systems, i.e. braking systems / brake control systems with such a hydraulic brake module and two electromechanical individual wheel brakes, which are no more expensive or hardly more expensive than purely hydraulic braking systems / brake control systems. In this way, the present invention effectively contributes to encouraging drivers to use a braking system / brake control system that requires less toxic brake fluid because brake lines to one of the two axles of the respective vehicle are no longer required.The present invention therefore also contributes effectively to environmental protection.

[0005] In an advantageous embodiment, the hydraulic brake module, as an electrically driven actuator component, has only one actuator device. In contrast to the previously described prior art, the brake module according to the invention thus does not require a second actuator device. This also contributes significantly to reducing the manufacturing costs for the embodiment of the hydraulic brake module described here.

[0006] Preferably, the first hydraulic wheel brake cylinder is hydraulically connected to a brake fluid reservoir of the hydraulic brake module via a third valve device, and the second hydraulic wheel brake cylinder is hydraulically connected to a brake fluid reservoir of the hydraulic brake module via a fourth valve device. This can be used to execute stabilization functions, such as ABS / ESP and VDC, on the hydraulic brake module.

[0007] The control device according to the invention can, for example, be a central vehicle control unit. Therefore, a frequently used device type can be used for the control device through a simple redesign / reprogramming of the respective central vehicle control unit. This can be used to save installation space in a vehicle using the present invention.

[0008] The advantages described above are also ensured in a braking system for a vehicle which is designed with a corresponding braking module and such a control device.

[0009] In an advantageous embodiment of the braking system, the first hydraulic wheel brake cylinder can be mounted or is mounted on a wheel of a front axle of the vehicle, and the second hydraulic wheel brake cylinder is mounted on another wheel of the front axle. The advantages of the hydraulic braking module (compared to electromechanical single-wheel brakes), such as a higher clamping force, a higher dynamic response, and increased positioning accuracy of the actual braking torque generated, can thus be utilized for a front-wheel application. In this way, the embodiment of the braking system described here takes into account that a relatively high clamping force, a comparatively high dynamic response, and a relatively high positioning accuracy are desirable, especially for the wheels of the front axle.

[0010] As an advantageous development, the braking system can additionally comprise a first electromechanical single-wheel brake, which is or can be mounted on a wheel of a rear axle of the vehicle, and a second electromechanical single-wheel brake, which is or can be mounted on another wheel of the rear axle. The embodiment of the braking system described here can thus be referred to as a hybrid braking system / brake control system, which, with its electromechanical braking system (EMB) comprising the two electromechanical single-wheel brakes on the rear axle, is relatively inexpensive and can be mounted comparatively easily on the respective vehicle.

[0011] Preferably, the electronic device is additionally designed and / or programmed in such a way that, by means of the electronic device, a third target value relating to a first target braking torque for the first electromechanical single-wheel brake and a fourth target value relating to a second target braking torque for the second electromechanical single-wheel brake can be read out or set on the basis of the at least one provided braking request signal, and the first electromechanical single-wheel brake and the second electromechanical single-wheel brake can be controlled taking into account the third target value and the fourth target value in such a way that, by means of the first electromechanical single-wheel brake, a first actual braking torque corresponding to the first target braking torque and by means of the second electromechanical single-wheel brake, a second actual braking torque corresponding to the second target braking torque can be applied to the respectively assigned wheel of the rear axle.The multifunctionality of the control device / its electronic device described here eliminates the need to equip the braking system with additional control electronics.

[0012] The advantages described above can also be achieved by implementing a corresponding method for operating a hydraulic brake module of a vehicle having a total of two hydraulic wheel brake cylinders. It is expressly noted that the method for operating the hydraulic brake module can be further developed according to the above-explained embodiments of the hydraulic brake module, the control device, and the brake system.

[0013] Furthermore, implementing a corresponding method for braking a four-wheel vehicle also provides the advantages explained above. The method for braking a four-wheel vehicle can also be further developed according to the above-explained embodiments of the hydraulic brake module, the control device, and the brake system. Short description of the drawings

[0014] Further features and advantages of the present invention are explained below with reference to the figures. They show: Fig. 1 a schematic representation of the hydraulic brake module and the control device interacting with it, or the brake system equipped therewith; and Fig. 2 a flowchart for explaining an embodiment of the method for operating a hydraulic brake module of a vehicle having a total of two hydraulic wheel brake cylinders. Embodiments of the invention

[0015] Fig. 1 shows a schematic representation of the hydraulic brake module and the control device interacting with it, or the brake system equipped with it.

[0016] It is expressly pointed out that the usability of the hydraulic brake module 10 described below and the control device 12 interacting therewith is not limited to any specific vehicle type / motor vehicle type of a vehicle / motor vehicle to be braked / braked at least by means of the hydraulic brake module 10.

[0017] The hydraulic brake module 10 exclusively has a first hydraulic wheel brake cylinder 14a and a second hydraulic wheel brake cylinder 14b. In addition to the first hydraulic wheel brake cylinder 14a and the second hydraulic wheel brake cylinder 14b, the hydraulic brake module 10 has no further hydraulic wheel brake cylinders. The total number of hydraulic wheel brake cylinders 14a and 14b of the hydraulic brake module 10 is therefore two. Therefore, apart from the first hydraulic wheel brake cylinder 14a and the second hydraulic wheel brake cylinder 14b, no further hydraulic wheel brake cylinder is hydraulically connected (directly or indirectly) to any brake fluid-carrying line component of the hydraulic brake module.In addition, the hydraulic brake module 10 is designed as a compact unit such that no further hydraulic wheel brake cylinder can be hydraulically connected to the hydraulic brake module 10 without a significant modification or damage to the hydraulic brake module 10.

[0018] The hydraulic brake module 10 is equipped with an actuator device 16, which is why the hydraulic brake module 10 can also be described as a hydraulic brake control unit. The actuator device 16 can also be referred to as an actuation unit. The actuator device 16 has at least one electric motor 16a and at least one linearly adjustable piston 16b or at least one pump piston. The at least one linearly adjustable piston 16b of the actuator device 16 or the at least one pump piston of the actuator device 16 can be driven by the electric motor 16a in such a way that a pressure in at least one partial volume 10a of the hydraulic brake module 10 adjacent to the actuator device 16 can be increased by means of the at least one driven linearly adjustable piston 16b or pump piston. The actuator device 16 can, as in Fig. 1, a plunger device with at least one linearly adjustable piston 16b. Likewise, the actuator device 16 can comprise at least one pump with at least one pump piston. Thus, cost-effective actuator types can be used for the actuator device 16. The partial volume 10a of the hydraulic brake module 10 adjacent to the actuator device 16, in which the pressure can be increased by means of the actuator device 16, is hereinafter referred to as an effective volume 10a of the hydraulic brake module 10.

[0019] The hydraulic brake module 10 also has at least two pressure control valves 18a and 18b, wherein the first hydraulic wheel brake cylinder 14a is hydraulically connected to the effective volume 10a of the hydraulic brake module 10 via a first pressure control valve 18a of the two pressure control valves 18a and 18b, and the second hydraulic wheel brake cylinder 14b is hydraulically connected to the effective volume 10a of the hydraulic brake module 10 via a second pressure control valve 18b of the two pressure control valves 18a and 18b. As will become clear from the following description, the use of the two pressure control valves 18a and 18b (instead of two isolating valves) for the hydraulic brake module 10 enables a brake pressure build-up strategy in the two hydraulic wheel brake cylinders 14a and 14b, in which the equipping of the hydraulic brake module with a further actuator device / action unit can be dispensed with. Therefore, the hydraulic brake module 10 preferably has an electric motorized actuator component, ieas an actuator system designed with an electric motor 16a, exclusively the one actuator device 16. The omission of a further electrically motorized actuator component in addition to the actuator device 16 can be used to save installation space and reduce the manufacturing costs for the hydraulic brake module 10.

[0020] The control device 12 can be used to implement the advantageous brake pressure build-up strategy. For this purpose, the control device 12 has an electronic device 12a, which is designed and / or programmed such that by means of the electronic device 12a not only a first target value relating to a first target brake pressure for the first hydraulic wheel brake cylinder 14a of the hydraulic brake module 10 and a second target value relating to a second target brake pressure for the second hydraulic wheel brake cylinder 14b of the hydraulic brake module 10 can be determined / are determined, but also the electric motor 16a and the two pressure control valves 18a and 18b can be controlled / are controlled by means of at least one first control signal 12b, at least one second control signal 12c or by means of at least one third control signal 12d. The first target value and / or the second target value can, for example,the first / second target brake pressure and / or a first / second "hydraulic" target brake torque to be effected by means of the first / second hydraulic wheel brake cylinder 14a or 14b. The first target variable and the second target variable can optionally be readable from at least one provided brake request signal 20 or can be determined based on the at least one provided brake request signal 20. The at least one brake request signal 20 is to be understood as at least one signal relating to a deceleration of the vehicle requested by the driver by actuating a brake actuation element (not shown) of the vehicle or by an automatic speed control system (not sketched) of the vehicle.The at least one braking request signal 20 can be output to the control device 12, for example, by at least one brake actuation element sensor, which can detect actuation of the brake actuation element, and / or by the automatic cruise control system. The automatic cruise control system can be, for example, an adaptive cruise control system, an automatic system for autonomous driving of the vehicle, and / or an emergency braking system of the vehicle.

[0021] The electric motor 16a can be controlled by the electronic device 12a, taking into account the first target value and the second target value, in such a way that the pressure in the effective volume 10a of the hydraulic brake module 10 can be increased to a maximum of the first target brake pressure and the second target brake pressure by the controlled electric motor 16a. This can also be described as the respective target brake pressure of the higher-pressure hydraulic wheel brake cylinder 14a or 14b being set by the actuator device 16, at least in the effective volume 10a of the hydraulic brake module 10.In addition, the first pressure control valve 18a and the second pressure control valve 18b are / are controllable / controlled by means of the electronic device 12a, taking into account the first target value and the second target value, in such a way that a first actual brake pressure present in the first hydraulic wheel brake cylinder 14a can be increased / increased and / or maintained / kept to the first target brake pressure and a second actual brake pressure present in the second hydraulic wheel brake cylinder 14 can be increased / increased and / or maintained / kept to the second target brake pressure. In order to achieve the corresponding actual brake pressure, the respective pressure control valve 18a or 18b of the higher-pressure hydraulic wheel brake cylinder 14a or 14b can be controlled or held in its open state at least temporarily, while the respective pressure control valve 18a or 18b of the lower-pressure hydraulic wheel brake cylinder 14a or 14b is controlled by means of a suitable delta pressure control (Δ pressure control).In particular, an “established” strategy of the ESP return hydraulics can be used as the respective delta pressure control.

[0022] For example, a first target brake pressure of 50 bar in the first hydraulic wheel brake cylinder 14a and a second target brake pressure of 10 bar in the second hydraulic wheel brake cylinder 14b can be realized as corresponding actual brake pressures by increasing the pressure in the effective volume 10a of the hydraulic brake module 10 to 50 bar by means of appropriate operation of the electric motor 16a, opening the first pressure control valve 18a, and applying a differential pressure of 40 bar to the second pressure control valve 18b. Preferably, the pressure control valves 18a and 18b are designed as normally open valves. If necessary, each of the pressure control valves 18a and 18b can be switched to the open state by interrupting its power supply.

[0023] It is pointed out again here that the advantageous design / programming of the control device 12 / its electronic device 12a described in the preceding paragraphs, together with the equipping of the hydraulic brake module 10 with the two pressure control valves 18a and 18b, can be used to save on expensive components in the hydraulic brake module 10. The hydraulic brake module 10, which interacts with the control device 12, can therefore be manufactured comparatively inexpensively and is nevertheless well suited for use in a hybrid braking system as described below.

[0024] Optionally, the first hydraulic wheel brake cylinder 14a can be hydraulically connected to a brake fluid reservoir 24 of the hydraulic brake module 10 via a first wheel outlet valve 22a, and the second hydraulic wheel brake cylinder 14 can be hydraulically connected to a brake fluid reservoir 24 of the hydraulic brake module 10 via a second wheel outlet valve 22b. Differential pressures between the actual brake pressures in the hydraulic wheel brake cylinders 14a and 14b can thus be achieved not only by means of the pressure control valves 18a and 18b, but also by reducing at least one of the actual brake pressures by means of the at least one associated wheel outlet valve 22a and 22b. The wheel outlet valves 22a and 22b can optionally be switching valves or pressure control valves. The wheel outlet valves 22a and 22b (together with the pressure control valves 18a and 18b) can also be used advantageously for stabilization functions, such as ABS (anti-lock braking system), ESP (Electronic Stability Control) and / or VDC (Vehicle Dynamic Control).

[0025] If desired, the actuator device 16 can also be hydraulically connected to the brake fluid reservoir 24 via a further valve 26. By opening the valve 26 while simultaneously closing the pressure control valves 18a and 18b, the respective first or second actual brake pressure in the hydraulic wheel brake cylinders 14a and 14b can be maintained during a "replenishment", ie during a suction of brake fluid from the brake fluid reservoir 24, while the additionally required volume is sucked from the brake fluid reservoir 24 through the opened valve 26. However, equipping the hydraulic brake module 10 with the valve 26 is optional. Fig. 1 The depicted equipment of the hydraulic brake module 10 with a pre-pressure sensor 28 for measuring the pressure in the effective volume 10a of the hydraulic brake module 10 is to be interpreted only as an example.

[0026] Preferably, the vehicle's brake actuating element (not shown), such as a brake pedal, is mechanically decoupled from the hydraulic brake module 10 such that the braking request specified by the driver is transmitted purely electronically ("by wire") via the control device 12 to the hydraulic brake module 10. In this case, the hydraulic brake module 10 does not have a force-pressure converter element by means of which a pressure buildup in the hydraulic brake module 10 could be effected by converting the driver braking force exerted on the brake actuating element by the driver braking force. This can also be described as the driver actuating the brake actuating element not braking into the hydraulic brake module 10. If appropriate, the hydraulic brake module 10 can be referred to as a "brake-by-wire" (BBW) brake module.

[0027] The control device 12 can, for example, be a central vehicle control unit. Alternatively, the control device 12 can also be a subunit of a braking system / brake control system equipped with the hydraulic brake module 10. In this case, the hydraulic brake module 10 can be arranged / arranged on the respective vehicle in such a way that the first hydraulic wheel brake cylinder 14a can be mounted / mounted on a wheel of a front axle of the vehicle and the second hydraulic wheel brake cylinder 14a can be mounted / mounted on another wheel of the front axle. The advantages of the hydraulic brake module 10, such as its comparatively high clamping force, its relatively dynamic response behavior, and its good positioning accuracy of a respective "hydraulically" generated actual braking torque, can be utilized for a front-wheel application in this case.

[0028] As an advantageous development, the braking system can additionally comprise a first electromechanical single-wheel brake 30a and a second electromechanical single-wheel brake 30b. The respective electromechanical single-wheel brakes 30a and 30b can also be understood as an electromechanical single-wheel actuator or an electromechanical parking brake. The two electromechanical single-wheel brakes 30a and 30b form an electromechanical brake 32, by means of which two wheels of the same axle of the respective vehicle can be braked individually. The braking system comprising the hydraulic brake module 10 and the electromechanical brake 32 can therefore be referred to as a so-called hybrid braking system / brake control system.This hybrid braking system / brake control system realizes a complete integration of parking brakes into the actuators of the axle of the respective vehicle equipped with the electromechanical individual wheel brakes 30a and 30b.

[0029] The brake system of the Fig. 1 can be described as a "brake-by-wire" (BBW) braking system. Since the braking system meets many redundancy requirements, its design as a BBW braking system is advantageous.

[0030] It is expressly pointed out that the braking system of the Fig. 1 no brake lines are required for the axle of the vehicle braked by the two electromechanical independent wheel brakes 30a and 30b. Therefore, the braking system of the Fig. 1 also uses comparatively little toxic and / or environmentally harmful brake fluid and can be installed on the respective vehicle with significantly reduced installation effort.

[0031] Preferably, the first electromechanical single-wheel brake 30a is mountable / mounted on a wheel of a rear axle of the vehicle, while the second electromechanical single-wheel brake 30b is mountable / mounted on another wheel of the rear axle. In this case, the wheels of the front axle are braked by means of the hydraulic brake module 10, while the electromechanical single-wheel brakes 30a and 30b are used to brake the wheels of the rear axle. Such an axle assignment of the subunits 10 and 32 of the braking system of the Fig. 1 takes into account that for a rear-wheel application, only a low clamping force, a low dynamic response, and a low positioning accuracy of the respective brake are generally required. The increased clamping force of the hydraulic brake module 10, its greater dynamic response, and its higher positioning accuracy (compared to the electromechanical single-wheel brakes 30a and 30b) can therefore be specifically used for the front axle.

[0032] The Fig. The braking system schematically shown in Figure 1 thus ensures a variable distribution of braking force between the front and rear wheels of the vehicle. It can advantageously interact with at least one electric motor used on the respective vehicle, which can be used in its recuperative mode to brake the vehicle. Possibilities for an advantageous symbiogenesis between the at least one electric motor, which can also be used specifically to drive the vehicle, and the braking system of the Fig. 1 are given.

[0033] As an advantageous development of the control device 12, the electronic device 12a can additionally be designed and / or programmed such that, by means of the electronic device 12a, based on the at least one provided brake request signal 20, a third target variable relating to a first target braking torque for the first electromechanical single-wheel brake 30a and a fourth target variable relating to a second target braking torque for the second electromechanical single-wheel brake 30b can be read out or can be set or can be set.If necessary, the first electromechanical single-wheel brake 30a and the second electromechanical single-wheel brake 30b can be controlled by means of the electronic device 12a, taking into account the third target variable and the fourth target variable, by means of at least one fourth control signal 12e or at least one fifth control signal 12f, in such a way that a first actual braking torque corresponding to the first target braking torque can be applied to the respectively assigned wheel of the rear axle by means of the first electromechanical single-wheel brake 30a and a second actual braking torque corresponding to the second target braking torque can be applied to the respectively assigned wheel of the rear axle by means of the second electromechanical single-wheel brake 30b.

[0034] Alternatively, as in Fig. 1, instead of the control device 12, an additional control electronics unit 34 can also be used to control the electromechanical individual wheel brakes 30a and 30b. The additional control electronics unit 34 also offers a possibility for implementing redundancies in automated driving. Furthermore, the additional control electronics unit 34 can be combined with another application.

[0035] For the components of the hybrid braking system of the Fig. 1, separate power supplies can also be used. Alternatively, all components of the braking system of the Fig. 1 may only be supplied with power via a (common) power supply.

[0036] The braking system of the Fig. 1 can be advantageously used to implement stabilization functions, especially for longitudinal and / or transverse stabilization, such as ABS (Anti-lock Braking System), ESP (Electronic Stability Control) and / or VDC (Vehicle Dynamic Control). It is expressly pointed out that the stabilization functions can be implemented individually for each wheel, both on the axle braked by means of the hydraulic brake module 10 and on the axle braked purely mechanically by means of the two electromechanical individual wheel brakes 30a and 30b. Likewise, the braking system of the Fig. 1 is very well suited for the execution of driver assistance functions, i.e. active and / or passive interventions, such as TCS (Traction Control System), VDC (Vehicle Dynamic Control) and / or ACC (Adaptive Cruise Control), and automatic functions, especially emergency braking functions, in particular AEB (Autonomous Emergency Braking), which can be executed both by means of the hydraulic brake module 10 and by means of the electromechanical individual wheel brakes 30a and 30b. It is again pointed out that the braking system of the Fig. 1 can also be used for automated driving due to its advantageous redundancies.

[0037] Fig. 2 shows a flow chart for explaining an embodiment of the method for operating a hydraulic brake module of a vehicle having a total of two hydraulic wheel brake cylinders.

[0038] It should be noted that the feasibility of the procedure described below is not limited to a particular vehicle type / motor vehicle type of the respective vehicle / motor vehicle.

[0039] In a method step S1 of the method, a first target variable relating to a first target brake pressure for a first hydraulic wheel brake cylinder of the hydraulic brake module and a second target variable relating to a second target brake pressure for a second hydraulic wheel brake cylinder of the hydraulic brake module are read out or determined based on at least one provided brake request signal. As already explained above, the at least one brake request signal is understood to be a signal relating to a deceleration of the vehicle requested by the driver or by an automatic cruise control system of the vehicle. Examples of the first target variable and the second target variable have already been listed above.

[0040] In a later method step S2, an electric motor of an actuator device of the hydraulic brake module is controlled, taking into account the first target value and the second target value, such that at least one linearly adjustable piston of the actuator device or at least one pump piston of the actuator device is driven by the electric motor. This occurs in such a way that, by means of the at least one driven linearly adjustable piston or pump piston, a pressure in at least one partial volume of the hydraulic brake module adjacent to the actuator device is increased to a maximum of the first target brake pressure and the second target brake pressure.

[0041] Preferably, a method step S3 is also carried out simultaneously with method step S2. As method step S3, a first pressure control valve of the hydraulic brake module, via which the first hydraulic wheel brake cylinder is hydraulically connected to the partial volume of the hydraulic brake module adjacent to the actuator device, and a second pressure control valve of the hydraulic brake module, via which the second hydraulic wheel brake cylinder is hydraulically connected to the partial volume of the hydraulic brake module adjacent to the actuator device, are controlled taking into account the first target value and the second target value in such a way that a first actual brake pressure present in the first hydraulic wheel brake cylinder is increased to the first target brake pressure and a second actual brake pressure present in the second hydraulic wheel brake cylinder is increased and / or maintained at the second target brake pressure.Thus, carrying out the process steps S1 to S3 also brings about the advantages explained above.

[0042] Method steps S1 to S3 can also be part of a method for braking a four-wheel vehicle. If appropriate, method steps S1 to S3 operate a hydraulic brake module comprising a total of two hydraulic wheel brake cylinders, the first hydraulic wheel brake cylinder of which is arranged on a wheel of a front axle of the vehicle and the second hydraulic wheel brake cylinder of which is arranged on another wheel of the front axle.

[0043] In an (optional) method step S4, a third target value relating to a first target braking torque for a first electromechanical single-wheel brake arranged on a wheel of a rear axle of the vehicle and a fourth target value relating to a second target braking torque for a second electromechanical single-wheel brake arranged on a further wheel of the rear axle can be read out or determined on the basis of the at least one provided braking request signal.In a further (optional) method step S5, the first electromechanical single-wheel brake and the second electromechanical single-wheel brake are controlled taking into account the third target variable and the fourth target variable in such a way that a first actual braking torque corresponding to the first target braking torque is applied to the respectively assigned wheel of the rear axle by means of the first electromechanical single-wheel brake and a second actual braking torque corresponding to the second target braking torque is applied to the respectively assigned wheel of the rear axle by means of the second electromechanical single-wheel brake. QUOTES CONTAINED IN THE DESCRIPTION

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

[0000] DE 10 2020 206 911 A1

[0002]

Claims

[1] Hydraulic brake module (10) for a vehicle with: an actuator device (16), by means of whose electric motor (16a) at least one linearly adjustable piston (16b) of the actuator device (16) or at least one pump piston of the actuator device (16) can be driven in such a way that by means of the at least one driven linearly adjustable piston (16b) or pump piston, a pressure in at least one partial volume (10a) of the hydraulic brake module (10) adjacent to the actuator device (16) can be increased; and a total number of hydraulic wheel brake cylinders (14a, 14b) equal to two, of which a first hydraulic wheel brake cylinder (14a) is hydraulically connected via a first valve device (18a) and a second hydraulic wheel brake cylinder (14b) is hydraulically connected via a second valve device (18b) to the partial volume (10a) of the hydraulic brake module (10) adjacent to the actuator device (16); characterized by , that the first valve device (18a) is a first pressure control valve (18a) and the second valve device (18b) is a second pressure control valve (18b). [2] Hydraulic brake module (10) according to claim 1, wherein the hydraulic brake module (10) has exclusively the one actuator device (16) as the electromotorized actuator component (16). [3] Hydraulic brake module (10) according to claim 1 or 2, wherein the first hydraulic wheel brake cylinder (14a) is hydraulically connected to a brake fluid reservoir (24) of the hydraulic brake module (10) via a third valve device (22a) and the second hydraulic wheel brake cylinder (14b) is hydraulically connected to a brake fluid reservoir (24) of the hydraulic brake module (10) via a fourth valve device (22b). [4] Control device (12) for a vehicle for interaction with a hydraulic brake module (10) according to one of the preceding claims, wherein the control device (12) comprises an electronic device (12a) which is designed and / or programmed such that by means of the electronic device (12a): - based on at least one provided brake request signal (20) relating to a deceleration of the vehicle requested by the driver or by an automatic speed control system of the vehicle, a first target value relating to a first target brake pressure for the first hydraulic wheel brake cylinder (14a) of the hydraulic brake module (10) and a second target value relating to a second target brake pressure for the second hydraulic wheel brake cylinder (14b) of the hydraulic brake module (10) can be read out or determined; - the electric motor (16a) of the actuator device (16) of the hydraulic brake module (10) can be controlled taking into account the first target value and the second target value such that, by means of the controlled electric motor (16a), the pressure in the partial volume (10a) of the hydraulic brake module (10) adjacent to the actuator device (16) can be increased to a maximum of the first target brake pressure and the second target brake pressure; and - the first pressure control valve (18a) of the hydraulic brake module (10) and the second pressure control valve (18b) of the hydraulic brake module (10) can be controlled taking into account the first target value and the second target value such that a first actual brake pressure present in the first hydraulic wheel brake cylinder (14a) can be increased to the first target brake pressure and a second actual brake pressure present in the second hydraulic wheel brake cylinder (14b) can be increased and / or maintained at the second target brake pressure. [5] Control device (12) according to claim 4, wherein the control device (12) is a central vehicle control unit. [6] Braking system for a vehicle with: a hydraulic brake module (10) according to one of claims 1 to 3; a control device (12) according to claim 4. [7] Braking system according to claim 6, wherein the first hydraulic wheel brake cylinder (14a) is mountable or mounted on a wheel of a front axle of the vehicle and the second hydraulic wheel brake cylinder (14b) is mountable or mounted on another wheel of the front axle. [8] Braking system according to claim 7, wherein the braking system additionally comprises a first electromechanical single-wheel brake (30a) which is mountable or mounted on a wheel of a rear axle of the vehicle, and a second electromechanical single-wheel brake (30b) which is mountable or mounted on another wheel of the rear axle. [9] Braking system according to claim 8, wherein the electronic device (12a) is additionally designed and / or programmed such that by means of the electronic device (12a): - based on the at least one provided braking request signal (20), a third target value relating to a first target braking torque for the first electromechanical single-wheel brake (30a) and a fourth target value relating to a second target braking torque for the second electromechanical single-wheel brake (30b) can also be read out or determined; and - the first electromechanical single-wheel brake (30a) and the second electromechanical single-wheel brake (30b) can be controlled taking into account the third target variable and the fourth target variable such that a first actual braking torque corresponding to the first target braking torque can be applied to the respectively assigned wheel of the rear axle by means of the first electromechanical single-wheel brake (30a) and a second actual braking torque corresponding to the second target braking torque can be applied to the respectively assigned wheel of the rear axle by means of the second electromechanical single-wheel brake (30b). [10] Method for operating a hydraulic brake module (10) of a vehicle having a total of two hydraulic wheel brake cylinders (14a, 14b), comprising the steps: Reading out or setting a first target value relating to a first target brake pressure for a first hydraulic wheel brake cylinder (14a) of the hydraulic brake module (10) and a second target value relating to a second target brake pressure for a second hydraulic wheel brake cylinder (14b) of the hydraulic brake module (10) based on at least one provided brake request signal (20) relating to a deceleration of the vehicle (S1) requested by the driver or by an automatic speed control system of the vehicle; Controlling an electric motor (16a) of an actuator device (16) of the hydraulic brake module (10) taking into account the first target value and the second target value such that at least one linearly adjustable piston (16b) of the actuator device (16) or at least one pump piston of the actuator device (16) is driven by the electric motor (16a) such that, by means of the at least one driven linearly adjustable piston (16b) or pump piston, a pressure in at least one partial volume (10a) of the hydraulic brake module (10) adjacent to the actuator device (16) is increased to a maximum of the first target brake pressure and the second target brake pressure (S2); and Controlling a first pressure control valve (18a) of the hydraulic brake module (10), via which the first hydraulic wheel brake cylinder (14a) is hydraulically connected to the partial volume (10a) of the hydraulic brake module (10) adjacent to the actuator device (16), and a second pressure control valve (18b) of the hydraulic brake module (10), via which the second hydraulic wheel brake cylinder (14b) is hydraulically connected to the partial volume (10a) of the hydraulic brake module (10) adjacent to the actuator device (16), taking into account the first target value and the second target value such that a first actual brake pressure present in the first hydraulic wheel brake cylinder (14a) is increased to the first target brake pressure and a second actual brake pressure present in the second hydraulic wheel brake cylinder (14b) is increased and / or maintained at the second target brake pressure (S3). [11] Method for braking a four-wheeled vehicle, comprising the steps of: Operating a hydraulic brake module (10) having a total of two hydraulic wheel brake cylinders (14a, 14b), the first hydraulic wheel brake cylinder (14a) of which is arranged on a wheel of a front axle of the vehicle and the second hydraulic wheel brake cylinder (14b) of which is arranged on a further wheel of the front axle, according to the method according to claim 10; Reading out or setting a third target value relating to a first target braking torque for a first electromechanical single-wheel brake (30a) arranged on a wheel of a rear axle of the vehicle and a fourth target value relating to a second target braking torque for a second electromechanical single-wheel brake (30b) arranged on another wheel of the rear axle based on the at least one provided braking request signal (20)(S4); and Controlling the first electromechanical single-wheel brake (30a) and the second electromechanical single-wheel brake (30b) taking into account the third target variable and the fourth target variable such that a first actual braking torque corresponding to the first target braking torque is effected by means of the first electromechanical single-wheel brake (30a) and a second actual braking torque corresponding to the second target braking torque is effected by means of the second electromechanical single-wheel brake (30b) on the respectively assigned wheel of the rear axle (S5).

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