Braking system and method of operating a braking system and motor vehicle

Abstract

The invention relates to a brake system (1) for a motor vehicle (2), having a brake device (3) for braking a wheel (4) of the motor vehicle (2), an actuator device (5) for targeted actuation of the brake device (3), a control device (6) for controlling the actuator device (5) and an emergency brake device (7) for braking the wheel (4) in the event of a malfunction of the motor vehicle (2). The emergency brake device (7) has an energy storage device (8) for storing energy for actuating the brake device (3) and a triggering device (9) for releasing the energy stored in the energy storage device (8) for actuating the brake device (3), wherein the triggering device (9) is designed to release the energy storage device (8) in the event of a failure of the on-board power supply system of the motor vehicle (2). Furthermore, the invention also relates to a method for operating a brake system (1) and a motor vehicle (2) having a brake system according to the invention.

Description

Technical Field

[0001] This invention relates to a braking system for motor vehicles, particularly a so-called "brake-by-wire" braking system, comprising a braking device for braking the wheels of the motor vehicle, an actuator device for selectively operating the braking device, a control device for controlling the actuator device, and an emergency braking device for braking the wheels in the event of a motor vehicle malfunction. Furthermore, this invention also relates to a method for operating the braking system according to the invention, and a motor vehicle having the braking system according to the invention. Background Technology

[0002] Traditional motor vehicles generally have two types of braking systems. There are braking systems designed for driving, used to brake moving vehicles, or for short-term stopping, such as at traffic lights. For simplicity, this type of braking system will be referred to as the braking system below. There is also a parking brake system, used to hold a stationary vehicle in a parking position. The parking brake system is not particularly well-suited for braking moving vehicles. In the following text, these braking systems will always be referred to as the parking brake system.

[0003] In conventional braking systems, the braking force is transmitted mechanically, and especially hydraulically, via the brake pedal to the braking device, such as a disc brake with a brake disc, caliper, and pads, for braking the wheels of a motor vehicle. Even in the event of a failure in the vehicle's onboard electrical system, braking the wheels via the operation of the braking device remains possible (at least with reduced braking effectiveness).

[0004] Modern brake-by-wire systems feature braking devices that can be operated by electrically powered actuators. The braking intention can be transmitted electrically to the actuators via the braking system's control unit. The necessary electrical energy can be supplied by the vehicle's onboard electrical system. A disadvantage of these systems is that in the event of a failure in the onboard electrical system, the braking device can no longer actively brake the vehicle. This situation is particularly dangerous for vehicle occupants and other road users and equipment in the vehicle environment.

[0005] In addition, various parking brake systems for motor vehicles are known. Patent document US 10,207,694 B2 discloses a pneumatically operated parking brake system. An actuator can operate the parking brake via compressed air using an electrical signal. In the event of a failure in the vehicle's electrical system, the electrical signal for activating the parking brake can no longer be transmitted. Patent document WO 2019 / 158 351A1 discloses an electric parking brake with redundant power supplies, ensuring that additional power is available for the operation of the parking brake in the event of a power failure. The parking brake cannot be activated when the vehicle's electrical system completely fails. An electric parking brake system with a spring mechanism for operating the parking brake and a compressed air system for releasing the parking brake is known from patent document US2020 / 0 189 550 A1, which can be operated by a control device. In the event of a failure in the main braking system, the parking brake system can be used as an emergency braking system. For this purpose, a normally functioning vehicle electrical system is required.

[0006] The known drawbacks of brake-by-wire and parking brake systems are that they require constant access to the vehicle's electrical system to activate, as electrical power is needed to transmit control commands. In the event of an electrical system failure, wheel chocks cannot be secured. Even when activated, they cannot provide targeted braking torque during emergency braking, increasing the risk of excessive braking and significantly increasing the likelihood of loss of steering control. Summary of the Invention

[0007] Therefore, the technical problem to be solved by the present invention is to overcome, or at least partially overcome, the aforementioned disadvantages in braking systems for motor vehicles. In particular, the technical problem to be solved by the present invention is to provide a braking system for motor vehicles, a method for operating the braking system, and a motor vehicle that ensures safe braking of the moving motor vehicle in a simple and economical manner in the event of a failure of the vehicle's electrical grid.

[0008] Other features and details of the invention are derived from the dependent claims, the description, and the drawings. Herein, the features and details described in connection with the braking system according to the invention are also applicable to the method according to the invention and the motor vehicle according to the invention, and vice versa, so that cross-reference can always be made in relation to the disclosure of individual inventive subjects.

[0009] According to a first aspect of the invention, the aforementioned technical problem is solved by a braking system for a motor vehicle. The braking system includes a braking device for braking the wheels of the motor vehicle, an actuator device for specifically operating the braking device, a control device for controlling the actuator device, and an emergency braking device for braking the wheels in the event of a motor vehicle malfunction. According to the invention, the emergency braking device includes an energy storage device for storing energy to operate the braking device and a triggering device for releasing the energy stored in the energy storage device to operate the braking device, wherein the triggering device is designed to release the energy storage device in the event of a fault in the motor vehicle's onboard electrical network.

[0010] The braking device is designed to brake the wheels of a motor vehicle. The braking system preferably includes multiple such braking devices. Preferably, the braking system has four braking devices, each designed to brake a different wheel. The braking device is preferably designed as a disc brake with a brake disc that can be torsionalally coupled to the wheel and a brake caliper that can be mounted on the vehicle body. The brake caliper has brake pad supports thereon that are movably held relative to each other, and the brake pads are mounted on the brake pad supports. Alternatively, the braking device can also be designed as a drum brake with pivotable brake shoes, the brake pads preferably mounted on the brake shoes, or the braking device can be designed in other ways.

[0011] To provide braking intent, the braking system preferably has a braking intent device, which may include, for example, a brake pedal. The braking intent can thus be transmitted to the braking system by the driver of the vehicle specifically operating the brake pedal. A brake pedal may also be provided for the passenger side of the vehicle. Alternatively or additionally, the braking intent device may be designed as an interface to a driver assistance system, such as a brake assist or an interface to an autonomous vehicle control system, to receive braking intent from the driver assistance system.

[0012] The braking system has actuators for targeted operation of the braking device. According to the invention, the actuators can be designed, for example, as electro-hydraulic, electro-hydraulic, or electromechanical actuators. Braking pressure can be generated in the braking device by the actuators for braking the wheels. Therefore, the actuators are preferably designed for relative movement of the brake pad supports or brake shoes. The braking pressure and the resulting braking torque can be specifically set by the actuators.

[0013] The control device is designed for targeted control of the actuator device. The control device can, for example, cause the actuator device to be energized in a targeted manner to generate pneumatic, hydraulic, or mechanical pressure for relative movement of the brake pads, for example via an electric motor, preferably coupled to a transmission device, such as a gear drive or ball screw drive.

[0014] An emergency braking device is designed to brake the wheels in the event of a vehicle malfunction. Within the scope of this invention, a malfunction is understood to be, in particular, a failure of the entire vehicle's electrical system, rendering all electronic components inoperable. To ensure safe braking during such a malfunction, the emergency braking device includes an energy storage device and a triggering device. The emergency braking device is preferably designed for continuous braking of the wheels. This means that the emergency braking device is preferably designed to interact with the braking system after the vehicle has come to a stop, thus achieving the function of parking brake.

[0015] The energy storage device is designed to temporarily store energy for operating the braking system. The storage capacity of the energy storage device is preferably determined such that the energy is sufficient to safely bring a motor vehicle traveling at its maximum speed to a stop. The braking system preferably has an energy exchange device for adding energy to and releasing energy from the energy storage device. This energy exchange device allows a predetermined energy level to be set in the energy storage device. According to the invention, the energy storage device can be designed as an electric, pneumatic, hydraulic, and / or mechanical energy storage device. For example, a capacitor is preferred as an electric energy storage device. A pressure chamber is preferred as a pneumatic or hydraulic energy storage device. A spring device, such as a coil spring, is preferred as a mechanical energy storage device. The energy storage device is preferably designed for the targeted release of stored energy. According to the invention, the energy storage device may also have a pressure chamber in which a spring-loaded pressure piston is guided to change the chamber volume. Targeted release can be understood, for example, as a linear, gradual, decreasing, or intermittent release of energy. The energy storage device is preferably designed to be configurable for this purpose, so that, for example, the type of targeted energy release can be changed during motor vehicle operation. For example, intermittent energy release can be configured on snow-covered or wet lanes, progressive energy release can be configured during heavy traffic to avoid rear-end collisions, or decreasing energy release can be configured shortly before a curve.

[0016] The triggering device is designed to retain and release energy stored in the energy storage device. The stored energy can be released in such a way that the braking device can be operated directly or indirectly. This release can be achieved, for example, based on the braking purpose and / or the current deceleration of the vehicle and / or the current speed of the vehicle and / or the current downhill gradient of the lane. The triggering device is further designed to automatically release the energy stored in the energy storage device to operate the braking device in the event of a failure in the vehicle's electrical grid. Preferably, the triggering device is designed not to release the energy stored in the energy storage device to operate the braking device, at least during vehicle operation, when the vehicle's electrical grid is operating normally. The triggering device may, for example, have an energy storage device and an electric motor, configured such that the energy storage device is charged or can be charged through the vehicle's electrical grid when the vehicle's electrical grid is operating. The electric motor is preferably designed as a servo motor with high self-locking properties to prevent accidental release due to vibration or the like. The electric motor is preferably not energized in this state. The energy storage device is designed to automatically release electrical energy to the electric motor in the event of a failure in the vehicle's electrical grid. The energy stored in the energy storage device can thus be released to operate the braking device.

[0017] The braking system according to the present invention has advantages over conventional braking systems: in the event of a vehicle electrical grid failure, the emergency braking device ensures a reliable stop of the moving vehicle in a simple and economical manner. This is achieved through the coordinated action of an energy storage device and a triggering device. The triggering device is designed to automatically release the energy storage device in the event of a vehicle electrical grid failure, without requiring a power supply from the vehicle electrical grid. The energy storage device provides the braking device with the energy required to brake the vehicle. Therefore, compared to conventional braking systems, the braking system according to the present invention significantly increases operational safety.

[0018] According to a preferred improvement of the invention, the braking system may specify that the emergency braking device has a configuration device for specifically configuring the operation of the braking device that can be provided by the emergency braking device. The configuration device may, for example, be configured to increase, particularly specifically increase, and decrease, particularly specifically decrease, the energy stored in the energy storage device. Alternatively or additionally, the configuration device may be designed according to the invention to set or limit the maximum energy that can be released by the energy storage device and / or the release rate of the energy that can be released by the energy storage device. The configuration device is preferably designed to repeatedly configure the emergency braking device during vehicle operation, preferably at least once every five seconds, particularly preferably at least once per second, or continuously. The configuration device is preferably designed to perform the configuration of the energy storage device based on predetermined parameters, wherein said parameters are preferably correlated with, particularly particularly correlated with, the braking process of the vehicle. The advantage is that, by simple means and in an economical manner, the emergency braking device can generate the currently required braking torque in the event of a failure in the vehicle's electrical grid.

[0019] According to a preferred embodiment of the invention, the configuration device is designed to perform available maneuvers based on route data and / or weather data and / or traffic data and / or vehicle speed and / or the driving characteristics of the motor vehicle driver and / or the total weight of the motor vehicle and / or the tire condition of the motor vehicle. Route data, for example, can be considered as data regarding uphill slope, downhill slope, curves, lateral slope, lane width, lane surface, etc. Route data can be provided, for example, by the motor vehicle's navigation system, external data sources, and the motor vehicle's sensors, such as tilt sensors, radar sensors, lidar sensors, etc. Weather data, for example, can be considered as data regarding ambient temperature, precipitation, snow cover, ice, wind force, wind direction, etc. Weather data can be provided, for example, by external data sources and the motor vehicle's sensors, such as temperature sensors, radar sensors, lidar sensors, etc. Traffic data, for example, can be considered as data regarding traffic density, traffic flow, accidents, etc. Traffic data can be provided, for example, by external data sources and the motor vehicle's sensors, such as radar sensors, lidar sensors, etc. Driver characteristics are stored, for example, in the motor vehicle's storage device. Preferably, driver characteristics include driver-specific data, such as the driver's age and / or driving style and / or driving skills and / or driving ability. These data are all related to the braking characteristics of the vehicle. In this way, the emergency braking device can be configured according to the situation, allowing for, for example, more forceful emergency braking for a sporty driver compared to a conservative or cautious driver. Therefore, for example, more forceful emergency braking can be configured before a curve or on a steep downhill slope than on a straight road or a significant uphill slope. Thus, for example, when the distance to a vehicle ahead is less than the distance to a vehicle behind, more forceful emergency braking can be configured to prevent rear-end collisions. Its advantage is that it further improves the operational safety of the braking system through simple means and in an economical manner.

[0020] Further preferably, for configuring the energy storage device, the configuration device has a self-locking screw drive (or spindle drive). The self-locking screw drive is preferably designed as a ball screw drive. Preferably, the self-locking screw drive is designed to adjust and maintain the preload of the energy storage device, which is designed as a spring mechanism. Alternatively, the self-locking screw drive can be designed to adjust and maintain the volume of the energy storage device, which is designed as a pressure mechanism. This has the advantage of ensuring ease of configuration of the energy storage device through simple means and in an economical manner.

[0021] In a particularly preferred embodiment of the invention, the energy storage device is designed to directly operate the braking device and / or operate the actuator device for operating the braking device and / or operate the emergency actuator device for operating the braking device. Direct operation can be achieved, for example, by designing the energy storage device to apply pressure relative to the braking device, thereby generating braking torque. Operation of the actuator device can be achieved, for example, by the energy storage device providing a pressure medium, such as hydraulic fluid, which can be introduced into the actuator device to operate the braking device. In the context of the invention, the emergency actuator device is an additional actuator device that can operate the braking device through the energy storage device. Its advantage is that it further improves the operational safety of the braking system through simple means and in an economical manner.

[0022] The triggering device preferably includes an electromagnet for holding it in the base position. Furthermore, the triggering device preferably includes a spring mechanism with preload in the base position. In the event of a failure in the vehicle's electrical system, energizing the electromagnet also ceases, allowing the triggering device to be moved out of the base position by spring force and thus initiating the emergency braking process. This has the advantage of further improving the operational safety of the braking system through simple means and in an economical manner.

[0023] According to a preferred embodiment of the invention, the triggering device includes a voltage monitoring device for monitoring the vehicle's electrical grid, an electric servo motor for releasing an energy storage device to operate the braking device, and an energy storage device for storing an emergency operating current for operating the servo motor. The triggering device is designed to operate the servo motor via the emergency operating current in the event of a vehicle electrical grid failure. Preferably, the triggering device is designed so that the servo motor is not energized when the vehicle electrical grid is running. The servo motor preferably has a self-locking mechanism, maintaining its current position when not energized. A vehicle electrical grid failure can be detected by the voltage monitoring device. The voltage monitoring device is designed to release a current switch in this situation to operate the servo motor. Energy stored in the energy storage device, such as spring energy or hydrostatic energy, can be released through the servo motor to operate the braking device. This has the advantage of further improving the operational safety of the braking system through simple means and in an economical manner.

[0024] Particularly preferred is that the emergency braking device has a reset device for resetting the triggering device to the base position. With the reset device, the triggering device can be reset to the base position after an emergency braking process and when the vehicle electrical network is available again. The reset device is preferably designed as part of the triggering device. In the base position, it is preferable to prevent the release of energy stored in the energy storage device through the triggering device to operate the braking device. Furthermore, the braking system is preferably designed to refill the energy storage device so that in the event of another failure of the vehicle electrical network, the emergency braking device can be used for another emergency braking process. This design is preferred for the configuration device. Alternatively or additionally, the triggering device may also be designed for this purpose. Its advantage is that it further improves the operational safety of the braking system through simple means and in an economical manner.

[0025] According to a second aspect of the present invention, the above-mentioned technical problem is solved by a method for operating a braking system according to the present invention. The method comprises:

[0026] If the vehicle's electrical grid provides sufficient current to operate the actuator, the triggering device will remain in the base position.

[0027] The vehicle and environmental parameters that affect the braking purpose of safe braking of a motor vehicle are determined by the vehicle's identification device.

[0028] The operation of the braking device, which can be provided by the emergency braking device, can be configured by the configuration device.

[0029] If the vehicle's electrical grid no longer provides sufficient current to operate the actuators, the energy stored in the energy storage device is released via a triggering device.

[0030] The braking device is operated by energy released from the energy storage device.

[0031] First, the braking system is in normal working order. The vehicle's electrical network is operational, providing sufficient power for the operation of control and actuator devices. In this state, braking can be achieved without problems using the braking device. A determining device identifies braking-related parameters for the emergency braking device. The emergency braking device is configured based on these determined parameters. This configuration may, for example, involve the loading of an energy storage device and / or the energy output rate of the energy storage device during emergency braking. Preferably, this configuration ensures that safe emergency braking can be performed at any point during vehicle operation. In the event of a vehicle electrical network failure, when the normal operation of the braking system is no longer guaranteed, a triggering device automatically initiates the emergency braking process by releasing energy stored in the energy storage device to the braking device. This brakes the wheels.

[0032] The method according to the invention achieves all the advantages described for the braking system according to the first aspect of the invention. Therefore, the method according to the invention has advantages over conventional methods: in the event of a vehicle electrical grid failure, the emergency braking device ensures a reliable stop of the moving motor vehicle by a simple and economical means. This is achieved through the coordinated action of an energy storage device and a triggering device. The triggering device automatically releases the energy storage device in the event of a vehicle electrical grid failure, without requiring a power supply from the vehicle electrical grid. The energy storage device provides the braking device with the energy required to brake the motor vehicle. Therefore, a safe emergency braking process can be performed.

[0033] According to a third aspect of the invention, the aforementioned technical problem is solved by a motor vehicle. The motor vehicle has a drive system for driving the motor vehicle and a braking system for braking the motor vehicle. According to the invention, the braking system is configured as described in the invention. The motor vehicle preferably has multiple sensors designed to detect braking-related data for the braking system.

[0034] The motor vehicle according to the invention obtains all the advantages described for the braking system according to the first aspect of the invention and the method according to the second aspect of the invention. The motor vehicle according to the invention has advantages over conventional motor vehicles: in the event of a failure in the vehicle's electrical grid, the emergency braking device ensures a reliable stop of the moving vehicle in a simple and economical manner. This is achieved through the coordinated action of an energy storage device and a triggering device. The triggering device is designed to automatically release the energy storage device in the event of a failure in the vehicle's electrical grid, without requiring a power supply from the vehicle's electrical grid. The energy storage device provides the braking device with the energy required to brake the motor vehicle. Therefore, the operational safety of the motor vehicle according to the invention is greatly increased compared to conventional motor vehicles. Attached Figure Description

[0035] The braking system according to the invention, the method according to the invention, and the motor vehicle according to the invention are further described below with reference to the accompanying drawings. The drawings show:

[0036] Figure 1 A schematic sketch of a preferred first embodiment of the braking system according to the present invention is shown.

[0037] Figure 2 A schematic sketch of a preferred second embodiment of the braking system according to the present invention is shown.

[0038] Figure 3 A schematic sketch of a preferred third embodiment of the braking system according to the present invention is shown.

[0039] Figure 4 A flowchart illustrating a preferred embodiment of the method according to the present invention is shown.

[0040] Figure 5A side view of a preferred embodiment of a motor vehicle according to the present invention is shown. Detailed Implementation

[0041] In the appendix Figures 1 to 5 Components with the same function and mode of operation are respectively assigned the same reference numerals.

[0042] exist Figure 1 The sketch schematically illustrates the invention for use in a motor vehicle 2 (see reference). Figure 5 A preferred first embodiment of the braking system 1. The braking system 1 has a braking device 3 for braking a plurality of wheels 4 (not shown in the figure) respectively. Figure 5 The system also includes a hydraulic actuator 5 for operating the braking device 3. To generate the operating pressure for operating the braking device 3, the actuator 5 has a main pressure device 18 and a secondary pressure device 19. The braking system 1 has a control device 6 for operating the actuator 5.

[0043] Furthermore, the braking system 1 has an emergency braking device 7 for performing an emergency braking process. The emergency braking device 7 has an energy storage device 8 and a triggering device 9 for releasing the energy stored in the energy storage device 8 to operate the braking device 3. The energy storage device 8 has a pressure cylinder 20 in which a pressure piston 21 is movably fixed. A pressure spring 22 is arranged on the pressure piston 21. Alternatively or additionally, a tension spring can be arranged on the pressure piston 21, the spring force of which preferably acts in the same direction as the spring force of the pressure spring 22. The pressure piston 21 is shown in the base position, wherein the pressure spring 22 is preloaded. The pressure piston 21 is held in the base position by the triggering device 9. For this purpose, the triggering device 9 has an electromagnet 12. In the event of a power failure, the electromagnet 12 is not activated, causing the triggering device 9 to automatically release the pressure piston 21. The pressure piston 21 can be pressed from the base position into the pressure cylinder 20 by the preloaded pressure spring 22. In this way, hydraulic fluid is forced from the pressure cylinder 20 to the actuator device 5 to operate the braking device 3. To maintain pressure levels in the event of a vehicle electrical grid failure, actuator 5 has two protective valves 24 that open during normal operation and close when no power is supplied, especially in the event of a vehicle electrical grid failure. This prevents fluid from flowing from emergency braking device 7 towards main pressure device 18 and secondary pressure device 19.

[0044] Furthermore, the emergency braking device 7 has a configuration device 10, which is partially implemented by a triggering device 9 and partially by an emergency valve 23. Through the triggering device 9 of the configuration device 10, the position of the pressure piston 21 relative to the pressure cylinder 20 can be selectively changed, thus the preload of the pressure spring 22 can be increased or decreased accordingly. The emergency valve 23 of the configuration device is designed to selectively, preferably steplessly, restrict the flow of hydraulic fluid from the energy storage device 8 to the actuator device 5. The emergency valve 23 is preferably regulated by a control device 6 and preferably has a self-locking mechanism to maintain the valve position of the emergency valve 23 when control of the emergency valve 23 is not activated.

[0045] Figure 2 A preferred second embodiment of the braking system 1 according to the invention is illustrated schematically in sketch form. The braking system 1 according to the preferred second embodiment differs from the braking system 1 according to the preferred first embodiment in the design of the emergency braking device 7. The emergency braking device 7 is no longer fluidly coupled to the actuator device 5; instead, an emergency actuator device 11 is provided for operating the braking device 3, which is fluidly coupled to the energy storage device 8 via an emergency valve 23. Other operating modes of the emergency braking device 11 correspond to the preferred first embodiment of the invention.

[0046] exist Figure 3 A preferred third embodiment of the braking system 1 according to the invention is schematically illustrated in the sketch. The braking system 1 of the preferred third embodiment differs from the braking system 1 of the preferred first embodiment in the design of the triggering device 9 of the emergency braking device 7. The triggering device 9 is further designed as part of the configuration device 10. Now, the triggering device 9 has a voltage monitoring device 13, a servo motor 14, and an energy storage device 15 instead of an electromagnet 12. When a fault in the vehicle's electrical grid is detected by the voltage monitoring device 13, the electrical energy stored in the energy storage device 15 can be released through the voltage monitoring device 13 for the operation of the servo motor 14. The pressure piston 21 can be released by operating the servo motor 14. Other operating modes of the emergency braking device 11 correspond to the preferred first embodiment of the invention.

[0047] Figure 4 A preferred embodiment of the method according to the invention is illustrated schematically in a flowchart. According to the first method action 100, the vehicle 2 operates under normal driving conditions. Here, the triggering device 9 is held in a base position, for example by an electromagnet 12, a servo motor 14, etc. The electrical energy required for this is provided, for example, by the vehicle's onboard electrical network. According to the second method action 200, during the driving of the vehicle 2, the determining device 17 of the vehicle 2 (see reference 17)... Figure 5The vehicle parameters and environmental parameters are determined, as these parameters affect the braking purpose for safe braking of motor vehicle 2. These include, for example, route data, weather data, traffic data, vehicle speed, data on the driving characteristics of the driver of motor vehicle 2, the current gross weight of motor vehicle 2, and the condition of the tires of motor vehicle 2, etc. This determination is preferably performed continuously.

[0048] According to the third method action 300, the operation of the braking device 3, which can be provided by the emergency braking device 7, is configured by the configuration device 10. This is achieved, for example, by moving the pressure piston 21 in the pressure cylinder 20 by means of an electromagnet 12, a servo motor 14, etc., thereby changing the preload of the pressure spring 22. Alternatively or additionally, it is achieved, for example, by changing the valve position of the emergency valve 23. If the vehicle electrical network fails and no longer provides current or at least no longer provides sufficient current for operating the braking system 1, the fourth method action 400 is executed. In this case, the triggering device 9 automatically releases the energy storage device 8. This is achieved, for example, by releasing the pressure piston 21, which then continues to sink into the pressure cylinder 20 due to the preload of the pressure spring 22, thereby compressing the hydraulic fluid. According to the fifth method action 500, the braking device 3 is operated by the compressed hydraulic fluid, and the vehicle 2 is brought to a standstill and subjected to sustained braking, particularly suitable for certain situations.

[0049] Figure 5 The preferred embodiment of a motor vehicle 2 according to the present invention is shown schematically in a side view. The motor vehicle 2 has a drive system 25 for driving the wheels 4 of the motor vehicle 2. In addition, the motor vehicle 2 has a braking system 1 according to the present invention for braking the wheels 4. The braking system 1 has a plurality of determining devices 17, such as radar, lidar, rain sensor, navigation system, traffic information system, etc., for determining braking-related data.

[0050] List of reference numerals

[0051] 1 Braking System

[0052] 2 motor vehicles

[0053] 3. Braking device

[0054] 4 wheels

[0055] 5 Actuator Device

[0056] 6 control devices

[0057] 7. Emergency braking device

[0058] 8 energy storage devices

[0059] 9 triggering devices

[0060] 10 Configuration Devices

[0061] 11 Emergency Actuator Device

[0062] 12 Electromagnets

[0063] 12 Voltage Monitoring Devices

[0064] 14 servo motors

[0065] 15 Storage Battery

[0066] 16 Reset Device

[0067] 17. Determining device

[0068] 18 Main Pressure Unit

[0069] 19 pressure devices

[0070] 20 pressure cylinders

[0071] 21 Pressure Piston

[0072] 22 Compression Spring

[0073] 23 Emergency Valve

[0074] 24 protection valve

[0075] 25 drive system

[0076] 100 First Method Actions

[0077] 200 Second Method Action

[0078] 300 Third Method Action

[0079] 400 Fourth Method Action

[0080] 500 Fifth Method Action

Claims

1. A braking system (1) for a motor vehicle (2), comprising a braking device (3) for braking the wheels (4) of the motor vehicle (2), an actuator device (5) for selectively operating the braking device (3), a control device (6) for controlling the actuator device (5), and an emergency braking device (7) for braking the wheels (4) in the event of a malfunction in the operation of the motor vehicle (2). Its features are, The emergency braking device (7) has an energy storage device (8) for storing energy to operate the braking device (3) and a triggering device (9) for releasing the energy stored in the energy storage device (8) to operate the braking device (3), wherein the triggering device (9) is designed to release the energy storage device (8) in the event of a failure of the vehicle's (2) on-board electrical network, wherein the emergency braking device (7) has a configuration device (10) for specifically configuring the operation of the braking device (3) that can be provided by the emergency braking device (7).

2. The braking system (1) according to claim 1, Its features are, The configuration device (10) is designed to perform available maneuvers based on route data and / or weather data and / or traffic data and / or vehicle speed and / or the driving characteristics of the driver of the motor vehicle (2) and / or the total weight of the motor vehicle (2) and / or the tire condition of the motor vehicle (2).

3. The braking system (1) according to claim 1 or 2, Its features are, In order to configure the energy storage device (8), the configuration device (10) has a self-locking screw drive.

4. The braking system (1) according to claim 1, Its features are, The energy storage device (8) is designed to directly operate the braking device (3) and / or operate the actuator device (5) for operating the braking device (3) and / or operate the emergency actuator device (11) for operating the braking device (3).

5. The braking system (1) according to claim 1, Its features are, The triggering device (9) has an electromagnet (12) for holding the triggering device (9) in the base position.

6. The braking system (1) according to claim 1, Its features are, The triggering device (9) has a voltage monitoring device (13) for monitoring the vehicle power grid, an electric servo motor (14) for releasing the energy storage device (8) to operate the braking device (3), and an energy storage device (15) for storing the emergency operating current for running the servo motor (14). The triggering device (9) is designed to run the servo motor (14) by means of the emergency operating current in the event of a vehicle power grid failure.

7. The braking system (1) according to claim 1, Its features are, The emergency braking device (7) has a reset device (16) for resetting the trigger device (9) to the base position.

8. A method for operating a braking system (1) according to any one of claims 1 to 7, comprising: - If the vehicle-mounted electrical network provides sufficient current to operate the actuator (5), then the triggering device (9) will remain in the base position. - The vehicle parameters and environmental parameters that affect the braking purpose of safe braking of the motor vehicle (2) are determined by the determining device (17) of the motor vehicle (2). - The operation of the braking device (3) provided by the emergency braking device (7) can be configured by the configuration device (10). - If the vehicle-mounted power grid no longer provides sufficient current to operate the actuator (5), the energy stored in the energy storage device (8) is released through the trigger device (9). - The braking device (3) is operated by the energy released from the energy storage device (8).

9. A motor vehicle (2) having a drive system (25) for driving the motor vehicle (2) and a braking system (1) for braking the motor vehicle (2), Its features are, The braking system (1) is configured as a braking system (1) according to any one of claims 1 to 7.

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