DE102016211982A1 - Braking device for a vehicle - Google Patents

Abstract

The invention relates to a braking device for a vehicle with a motorized piston-cylinder device (10), wherein at least a first wheel brake cylinder (18, 18 a) of the braking device is connected to the motorized piston-cylinder device (10) that by means of Operation of the motorized piston-cylinder device (10) brake fluid in the at least one first wheel brake cylinder (18, 18 a) is transferable, wherein the braking device comprises at least one pump (24) to which the at least one first wheel brake cylinder (18, 18 a) and / or at least one second wheel brake cylinder (18b) of the brake device is connected so that brake fluid in the at least one first wheel brake cylinder (18, 18a) and / or the at least one second wheel brake cylinder (18b) is pumpable. Likewise, the invention relates to a hydraulic block for a braking device of a vehicle. Furthermore, the invention relates to a method for operating a brake device of a vehicle and to a method for mounting a brake device on a vehicle.

Description

The invention relates to a braking device for a vehicle and a hydraulic block for a braking device of a vehicle. Likewise, the invention relates to a method for operating a braking device of a vehicle. Furthermore, the invention relates to a method for mounting a brake device to a vehicle.

State of the art

In the DE 10 2013 205 650 A1 Brake devices for a vehicle and a method for operating the brake devices are described. Each of the brake devices includes a motorized piston-cylinder device having at least one piston, the at least one piston defining at least one pressure chamber of the motorized piston-cylinder device and being adjustable by operation of an engine of the motorized piston-cylinder device. a volume, which can be filled with brake fluid, of the pressure chamber delimited by the displaced piston can be reduced. In addition, in some of the brake devices at least one wheel brake cylinder is connected to the motorized piston-cylinder device that by means of the operation of the motor of the motorized piston-cylinder device brake fluid from the at least one pressure chamber in the at least one wheel brake cylinder is transferable.

Disclosure of the invention

The invention provides a braking device for a vehicle having the features of claim 1, a hydraulic block for a braking device of a vehicle having the features of claim 9, a method for operating a braking device of a vehicle having the features of claim 10 and a method for mounting a braking device on a vehicle with the features of claim 11.

Advantages of the invention

The present invention provides possibilities for slowing down / braking a vehicle / motor vehicle both by means of the motorized piston-cylinder device and by means of the at least one pump. Thus, due to the inventive usability of both the motorized piston-cylinder device and the at least one pump for decelerating / decelerating the vehicle / motor vehicle, one can speak of a realization of a redundant brake system by means of the present invention. This redundant brake system according to the invention has with the motorized piston-cylinder device a first pressure buildup unit and with the at least one pump a second pressure buildup unit, so that in case of functional impairment / failure of one of the two pressure buildup units nor the other of the two pressure buildup units to slow down / decelerate Vehicle is used. On a force or labor of a driver of the vehicle / motor vehicle for effecting the at least one brake pressure in the at least one wheel brake cylinder of the redundant brake system can thus be dispensed with in such a situation.

In addition, by means of the present invention, a redundant brake system can be realized, in which even with a functional impairment / failure of one of the two pressure build-up a driver's brake request remains recognizable and both the detected driver's brake request and a braking request default of a speed control automatic of the respective vehicle / motor vehicle (such an ACC system) can be performed by means of the other pressure build-up unit. The present invention thus provides a redundant braking system, which at a functional impairment / failure of one of the two pressure build units still senses the driver's braking request and without reaction to characteristic properties of a brake actuator / brake pedal (such as with respect to adjustment / pedal travel and adjustment / pedal force) can implement.

In the inventively provided redundant braking system, the two pressure buildup units can be used both for automatically braking comfort and assistance functions as well as for the driver's power assistance in slowing down / braking his vehicle / motor vehicle. The pressure buildup units can thus combine the functions of brake booster and modulation. The driver may remain in vehicle control responsibility during deployment of at least one of the two pressure buildup units of the redundant brake system. However, this is not necessary due to the redundant applicability of the two pressure buildup units, by means of which a functional impairment / failure of one of the two pressure buildup units can be bridged by means of the other of the two pressure buildup units. A transfer of the brake function to the driver in the event of failure of one of the two pressure buildup units is not necessary. The redundant braking system can therefore be used advantageously even for automated driving, since the redundant braking system is designed so that it fails during an automated driving operation is not holistic.

In an advantageous embodiment of the braking device, the at least one first wheel brake cylinder is connected via at least one first separating valve to the motorized piston-cylinder device and / or via at least one second separating valve to the at least one pump. The at least one first isolation valve and / or the at least one second isolation valve can be advantageously used for disconnecting the motorized piston-cylinder device and / or the at least one pump. It should be noted, however, that equipping the brake device with at least one such isolation valve is not necessary.

As a further development, the brake device may comprise a master cylinder, and the at least one first wheel brake cylinder may be connected to the master cylinder via at least one third isolation valve.

On an equipment of the brake device with the master cylinder or with the at least one third isolation valve can also be dispensed with.

In a further advantageous embodiment of the braking device, the at least one first wheel brake cylinder on the motorized piston-cylinder device and the at least one second wheel brake cylinder are connected to the at least one pump. In addition, in this embodiment of the brake device, no connection of the at least one first wheel brake cylinder to the at least one pump and no connection of the at least one second wheel brake cylinder to the motorized piston-cylinder device is formed. Preferably, in this case, at least one wheel is assigned to exactly one of the first wheel brake cylinders and one of the second wheel brake cylinders such that a first brake torque can be transmitted to the assigned wheel by means of the respective first wheel brake cylinder and a second brake torque to the same associated wheel by means of the respective second wheel brake cylinder , In a functional impairment / failure of the motorized piston-cylinder device, the at least one wheel can thus be braked by means of the at least one second wheel brake cylinder, while in a functional impairment / failure of the at least one pump, the at least one wheel by means of at least one first wheel brake cylinder still can be braked.

As an advantageous development, the brake device may have a first control device and a second control device. Preferably, in this case, the motor of the motorized piston-cylinder device by means of the first control device is controllable and the at least one pump motor of the at least one pump is controlled by the second control device. Preferably, the first control device is designed such that the motor of the motorized piston-cylinder device by means of the first control device is also controllable after a failure of the second control device. As an alternative or as a supplement thereto, the second control device can also be embodied in such a way that the at least one pump motor of the at least one pump can be actuated by the second control device even after a failure of the first control device. Thus, this embodiment of the brake device can be operated unimpaired by a functional impairment / failure of one of its two control devices.

For example, the first control device may be assigned a master status relative to the second control device and the second control device a slave status with respect to the first control device. Likewise, however, the second control device may also have a master status relative to the first control device and the first control device a slave status with respect to the second control device fixedly assigned. Alternatively, a hierarchy may be formed between the first control device and the second control device at a predetermined frequency between a master state of the first control device and the second control device in a slave state of the second control device relative to the first control device and a master Status of the second control device relative to the first control device in a slave state of the first control device with respect to the second control device switches.

The advantages described above are also provided in a corresponding hydraulic block for a braking device of a vehicle. It should be noted that the hydraulic block according to the previously described embodiments of the braking device can be further developed.

Also, carrying out a corresponding method of operating a brake device of a vehicle provides the advantages described above. The method for operating a brake device of a vehicle can be further developed in accordance with the described embodiments of the brake device.

Furthermore, the described advantages can also be realized by executing a corresponding method for mounting a brake device to a vehicle. The method for mounting a brake device a vehicle can be further developed according to the described embodiments of the braking device.

For example, the at least one first wheel brake cylinder on the motorized piston-cylinder device and the at least one second wheel brake cylinder on the at least one pump can be connected. Preferably, in this case, at least one wheel of the vehicle exactly one of the first wheel brake and one of the second wheel brake assigned so that by means of the respective first wheel brake a first braking torque to the associated wheel and by means of the respective second wheel brake a second braking torque to the same associated wheel are feasible.

Brief description of the drawings

Further features and advantages of the present invention will be explained below with reference to the figures. Show it:

1a to 1d schematic representations of a first embodiment of the braking device;

2 a schematic representation of a second embodiment of the braking device;

3 to 6 in each case a schematic representation of a third to sixth embodiment of the braking device;

7 a schematic representation of a seventh embodiment of the braking device;

8th and 9 each a schematic representation of an eighth and ninth embodiment of the braking device; and

10a to 10c schematic representations of master brake cylinders, which are used in the braking devices described above.

In the embodiments described below, the respective braking device as a first pressure build-up unit depending on a motorized piston-cylinder device and as a second pressure build-up unit depending on at least one pump. It should be understood, however, that the processes performed by the motorized piston-cylinder apparatus and the at least one pump are also practicable using a different type of first pressurizing unit and / or second pressurizing unit. For example, at least one vane pump, at least one gear pump and / or a brake booster (upstream of a master brake cylinder) can also perform the processes of the first pressure buildup unit and / or the second pressure buildup unit. Under the brake booster can be understood in particular a vacuum brake booster or an electromechanical brake booster (with an electric motor). Also, any other type of pressure expansion / volume shifting units employable in a brake system may perform the processes of the first pressure buildup unit and / or the second pressure buildup unit.

Embodiments of the invention

1a to 1d show schematic representations of a first embodiment of the braking device.

In the 1a to 1d schematically illustrated braking device can also be described as a brake system or part of a brake system. The brake device has as a first pressure build-up unit a motorized piston-cylinder device 10 with at least one piston / linear piston 12 on. The at least one piston 12 limits at least one pressure chamber 14 the motorized piston-cylinder device 10 and is by means of an operation of an engine 16 the motorized piston-cylinder device 10 adjustable so that a filled with brake fluid volume of the displaced piston 12 limited pressure chamber 14 is changeable / reducible (ie changed / reduced). It should be noted that the piston 12 as a linear piston along a predetermined Einbremsrichtung in the associated pressure chamber 14 by means of the operation of the engine 16 is adjustable.

For example, this may be the engine 16 the piston-cylinder device 10 via a thread / linear thread with the at least one piston 12 be connected.

At least one wheel brake cylinder 18 the brake device is so on the motorized piston-cylinder device 10 Tied, that by means of operation of the engine 16 the motorized piston-cylinder device 10 Brake fluid from the at least one pressure chamber 14 the motorized piston-cylinder device 10 in the at least one wheel brake cylinder 18 is transferable. In this way, at least one brake pressure in the at least one wheel brake cylinder 18 adjustable / be increased. Optionally, the at least one wheel brake cylinder 18 via at least one first separating valve 20 be attached to the motorized piston-cylinder device. On the equipment of the braking device with the at least one first isolation valve 20 but can also be dispensed with. In the embodiment of the 1a to 1d For example, the brake device has two brake circuits 22 with two wheel brake cylinders each 18 on, with each of the brake circuits 22 via a respective first isolation valve 20 on the motorized piston-cylinder device 10 is connected. However, a formability of the brake device is not limited to a certain number of brake circuits 22 , a number of their wheel brake cylinders 18 or on a special connection of the brake circuits 22 to the motorized piston-cylinder device 10 limited.

The braking device of 1a to 1d also has at least one pump 24 with at least one pump motor 26 on, at which the at least one wheel brake cylinder 18 is connected so that by means of an operation of the at least one pump motor 26 Brake fluid in the at least one wheel brake cylinder 18 is pumpable. This can also be the at least one pump 24 with the at least one pump motor 26 for increasing the at least one brake pressure in the at least one wheel brake cylinder 18 be used.

The at least one pump 24 For example, may be at least one rotary piston pump, at least one vane pump and / or at least one gear pump. A formability of at least one pump 24 is not limited to any particular type of pump. In particular, several pumps 24 by means of a single pump motor 26 be drivable so that the at least one brake pressure in the at least one wheel brake cylinder 18 is adjustable / steigerbar (ie adjusted / increased). The at least one pump 24 with the at least one pump motor 26 thus realizes a second pressure build-up unit of the brake device. The brake device can therefore be referred to as a redundant brake system with two pressure buildup units that can be used independently of one another, in which case the other of the two pressure buildup units can be used at any time to effect a slowdown / deceleration of the vehicle / motor vehicle equipped therewith in the event of functional impairment / failure of one of the two pressure buildup units.

Optionally, the at least one wheel brake cylinder 18 via at least one second isolation valve 28 at the at least one pump 24 tethered. For example, every brake circuit 22 the braking device via a respective second isolation valve 28 on each of the pumps 24 tethered. On an equipment of the braking device with the at least one second separating valve 28 but can also be dispensed with. Likewise, the in 1a to 1d shown training of a respective bypass line parallel to the at least one pump 24 and their equipment with one switching valve 29 optional.

As an advantageous development, the braking device of 1a to 1d also a (hydraulic) master cylinder 30 in which a driver by means of an actuation of a brake actuator 32 such as a brake pedal 32 , can brake. In addition, the at least one wheel brake cylinder 18 such on the master cylinder 30 Tethered that brake fluid from the master cylinder 30 in the at least one wheel brake cylinder 18 is transferable. If desired, the driver can therefore also by means of the actuation of the brake actuator 32 directly into the at least one wheel brake cylinder 18 halt to.

Optionally, the at least one wheel brake cylinder 18 via at least a third separating valve 34 to the master cylinder 30 be connected. On the equipment of the braking device with the at least one third separating valve 34 but can also be dispensed with. It should also be noted that due to the advantageous redundant applicability of the two pressure build-up units of the braking device to a hydraulic connection of the at least one wheel brake cylinder 18 to the master cylinder 30 (via the at least one third isolation valve 34 or without such a separating valve) can also be dispensed with. Also the equipment of the braking device with a simulator 36 , which has a simulator valve 38 at least one pressure chamber of the master cylinder 30 is only an optional further education.

By way of example, in the embodiment of FIG 1a to 1d the master cylinder 30 via the at least one third separating valve 34 at least one between one of the pumps 24 and the associated second isolation valve 28 connected running line section. Closing the at least one second isolation valve 28 therefore causes a disconnection of both the at least one pump 24 as well as the master cylinder 30 from the at least one wheel brake cylinder 18 , An Anbindbarkeit the at least one wheel brake cylinder 18 to the master cylinder 30 is not limited to the example shown here. Alternatively or additionally, the master cylinder 30 (eg via the at least one third separating valve 34 or at least one further third isolation valve) also on at least one between the motorized piston-cylinder device 10 and the at least one first isolation valve 20 be connected running line section.

Preferably, the motorized piston-cylinder device 10 that have at least one pump 24 and (if available) also the master cylinder 30 on at least one brake fluid reservoir 40 tethered. The components 10 . 24 and 30 In particular, each can have their own brake fluid reservoir 40 be connected. Alternatively, however, at least two of the components 10 . 24 and 30 at the same brake fluid reservoir 40 be hydraulically connected.

The braking device of 1a to 1d also has a training ESP system 42 from at least one Radeinlassventil and at least one Radauslassventil, wherein a visual representation of the individual valves in the brake circuits 22 is omitted. The as a motorized piston-cylinder device 10 trained first pressure build-up unit and the means of the components 24 . 24a and 26 realized second pressure build-up unit share in the embodiment of 1a to 1d the ESP system 42 , or the at least one wheel inlet valve and the at least one wheel outlet valve.

The motorized piston-cylinder device 10 that have at least one pump 24 , the ESP system 42 , and the valves 20 . 28 . 29 . 34 and 38 may all be controllable by a single control device, such as a central brake system control device. As an advantageous development, the braking device of 1a to 1d however, a first control device 10a on, by means of which the engine 16 the motorized piston-cylinder device 10 is controllable. In addition, the brake device has a second control device 24a , by means of which the at least one pump motor 26 the at least one pump 24 is controllable. Preferably, the first control device 10a designed such that the engine 16 the motorized piston-cylinder device 10 by means of the first control device 10a even after a failure of the second control device 24a is controllable. Alternatively or additionally, the second control device 24a be formed such that the at least one pump motor 26 the at least one pump 24 by the second control device 24a even after a failure of the first control device 10a is controllable. Such a design of at least one of the control devices 10a and 24a improves redundancy of the braking device. Thus, even a significant partial failure of the brake device can be bridged so that a force input / labor input of the driver for direct braking in the at least one wheel brake cylinder 18 by means of an actuation of the brake actuating element 32 can be waived.

In the braking device of 1a to 1d are also the ESP system 42 and the valves 20 . 28 . 29 . 34 and 38 by means of each of the control devices 10a and 24a controllable. Alternatively, a control of the ESP system 42 However, also be done by another (own) control device. In addition, the two control devices 10a and 24a designed to communicate with each other. In addition, a sensation of the driver's brake request (or an actuation of the brake actuating element 32 by the driver) both by means of the first control device 10a the motorized piston-cylinder device 10 (as the first pressure building unit) as well as by means of the second control device 24a (by means of the components 24 . 24a and 26 realized second pressure build-up unit) possible. This can be any of the control devices 10a and 24a (For example, via a vehicle bus) to at least one sensor driver's request determining / detecting be connected. Examples of such a sensor may be a pedal travel sensor, a rod travel sensor, a differential travel sensor, a driver brake force sensor and / or a driver brake pressure sensor. For a redundant integration of at least one such sensor in the overall system described is possible, so that even in the sensing of the driver's brake request a reliable redundancy is created.

In an in 1b reflected first active mode of the braking device switches the first control device 10a (The motorized piston-cylinder device 10 ) upon actuation of the brake actuator 32 by the driver, the at least one second isolation valve 28 in a closed state, causing the master cylinder 30 with the attached brake actuator 32 and the at least one pump 24 from the at least one wheel brake cylinder 18 be decoupled. At the same time, the first control device switches 10a the simulator valve 38 in an open state, so that the driver by means of its actuation of the brake actuator 32 Brake fluid from the master cylinder 30 in the simulator 36 shifts and thereby has a standard brake actuation feeling. A driver's braking request predefined by the driver may be provided by the first control device 10a sensed and by means of the engine 16 the motorized piston-cylinder device 10 (while the at least one first isolation valve 20 in an open state) can be implemented. It should be noted that the first active mode is also in case of functional impairment / failure of the at least one pump motor 26 and / or the second control device 24a the at least one pump 24 is executable.

In contrast, a in 1c reproduced second active mode of the braking device even in case of functional impairment / failure of the engine 16 and / or the first control device 10a the motorized piston-cylinder device 10 executable. This will be the at least one first isolation valve 20 and the at least one third isolation valve 34 from the second control device 24a the at least one pump 24 each controlled in a closed state, so that both the motorized piston-cylinder device 10 as well as the master cylinder 30 from the at least one wheel brake cylinder 18 be decoupled. By means of an open control of the simulator valve 38 can be ensured that the brake actuator 32 pushing drivers into the simulator 36 brakes, and therefore still has a standard brake actuation feel. At the same time, the driver's brake request may be from the second control device 24a sensed and by means of an operation of the at least one pump motor 26 (At a holding open the at least one second isolation valve 28 ) are implemented.

1d is a so-called inactive mode of the braking device again. In this inactive mode are at least a first isolation valve 20 and the simulator valve 38 in its closed state and the at least one second isolation valve 28 and the at least one third isolation valve 34 each in its open state, so that the driver by means of its actuation of the brake actuator 32 directly into the at least one wheel brake cylinder 18 can slow down. By using one each normally closed valve as the at least one first isolation valve 20 and the simulator valve 38 and each one normally open valve as the at least one second isolation valve 28 and the at least one third isolation valve 34 is the inactive mode of the braking device even in a total failure of a vehicle electrical system still executable. Thus, even in a total failure of the motorized piston-cylinder device 10 (as the first pressurizing unit) and the components 24 . 24a and 26 (As the second pressure build-up unit) the driver via a direct hydraulic connection still in the at least one wheel brake cylinder 18 Brake while the simulator 36 due to the closed simulator valve 38 from the master cylinder 30 decoupled present and therefore no shifted by the driver volume is lost in this.

Regarding further advantages of the braking device of 1a to 1d Reference is made to the description below.

2 shows a schematic representation of a second embodiment of the braking device.

In the braking device of 2 is on a hydraulic connection of the brake actuator 32 to the at least one brake circuit 22 / the at least one wheel brake cylinder 18 waived. The brake actuator 32 actuated driver instead brakes on an attached brake pedal box 44 a, by means of the structural design of a standard brake actuation feeling for the driver is ensured. As a brake pedal box 44 can replace the (hydraulic) master cylinder 30 also a cheaper component can be used.

In addition, in the brake system of 2 on its equipment with the at least one first isolation valve 20 and the at least one second isolation valve 28 waived. However, optionally, the braking device of the 2 at least one isolation valve 20 or 28 exhibit.

Regarding further features and advantages of the braking device of 2 Reference is made to the description of the preceding embodiment and to the lower embodiments.

3 to 6 each show a schematic representation of a third to sixth embodiment of the braking device.

As a development compared to the previously described embodiment, the braking device of 3 a master cylinder 30 on which (eg via at least a third separating valve 34 ) to the brake circuits 22 / the wheel brake cylinders 18 is connected. Regarding further characteristics of the braking device of 3 is based on the embodiments of 1 and 2 directed.

Also in 4 schematically illustrated braking device is a development of the embodiment of the 2 , However, the braking device of the 4 a means of the first control device 10a the motorized piston-cylinder device 10 controllable first ESP system 42a and one by means of the second control device 24a the at least one pump 24 controllable second ESP system 42b on. Each of the two ESP systems 42a and 42b each includes at least one own Radeinlassventil and at least one own Radauslassventil. In contrast to the embodiment of the 3 However, in the braking device of 4 to a hydraulic connection of the brake actuator 32 to the at least one wheel brake cylinder, or to a master cylinder 30 , omitted.

The embodiment of the 5 is a development of the braking device of 4 by the embodiment of the 5 the master cylinder 30 (With the attached brake actuator 32 ), which (eg via at least a third separating valve 34 ) at least one between one of the pumps 24 and the associated second ESP system 42b extending line section to the wheel brake cylinder 18 is connected. Further characteristics of the braking device of 5 are already described above.

As an additional development is in the braking device of 6 the master cylinder 30 (With the attached brake actuator 32 ) via at least one first conduction path at the at least one between one of the pumps 24 and the associated second ESP system 42b extending line section and at least one second conduction path at least one between the motorized piston-cylinder device 10 and the associated first ESP system 42a connected running line section. By means of at least one distributor valve, or a distributor valve device 46 , the at least one conduction path can be selected, via which upon actuation of the brake actuation element 32 by the driver brake fluid from the master cylinder 30 to the wheel brake cylinders 18 is moved. One can also rewrite this with the fact that the braking device of 6 with the two ESP systems 42a and 42b having two partial braking systems, wherein the master cylinder 30 is hydraulically parallel integrated in both partial braking systems.

7 shows a schematic representation of a seventh embodiment of the braking device.

At the in 7 schematically illustrated braking device is at least a first wheel brake cylinder 18a so on the motorized piston-cylinder device 10 connected, that by means of this brake fluid from the at least one pressure chamber 14 in the at least one first wheel brake cylinder 18a is transferable and at least one brake pressure in the at least one first wheel brake cylinder 18a is adjustable / steigerbar. In addition, at least one second wheel brake cylinder 18b the braking device so on the at least one pump 24 connected, that by means of the operation of the at least one pump motor 26 Brake fluid in the at least one second wheel brake cylinder 18b is pumpable, whereby at least one brake pressure in the at least one second wheel brake cylinder 18b is adjustable / steigerbar. You can the braking device of 7 Therefore, as a combination of two independent brake systems / partial braking systems rewrite, whereby a redundant (total) braking system is formed, which also has the advantages already described above. On a hydraulic connection of the brake actuator 32 such to the at least one first wheel brake cylinder 18a or to the at least one second wheel brake cylinder 18b in that the respective brake pressure is produced by means of an actuation of the brake actuation element 32 by the driver is adjustable / steigerbar, is in the braking device of 7 waived.

Advantageously, in the embodiment of the 7 at least one wheel exactly one of the first wheel brake cylinder 18a and one of the second wheel brake cylinders 18b so assigned that by means of the respective first wheel brake cylinder 18a a first braking torque on the associated wheel and by means of the respective second wheel brake cylinder 18b a second braking torque on the same associated wheel can be effected. In particular, each of the wheels, such as all four wheels in the embodiment of the 7 , exactly one of the first wheel brake cylinders 18a and one of the second wheel brake cylinders 18b be assigned such. Thus, even in a total failure of the motorized piston-cylinder device 10 as the first pressure build-up unit or by means of the components 24 . 24a and 26 realized second pressure build-up unit still have a braking effect on each of the wheels to be exercised.

8th and 9 each show a schematic representation of an eighth and ninth embodiment of the braking device.

The braking device of 8th is a development of the embodiment described above, by the on the brake actuator 32 Tailored master cylinder 30 (eg via at least a third separating valve 34 ) on the at least one first wheel brake cylinder 18a (Or at least one with the at least one first wheel brake cylinder 18a equipped brake circuit 22a ) is attached. Alternatively or additionally, the master cylinder 30 but also (eg via at least one further isolating valve) on the at least one second wheel brake cylinder 18b (Or at least one with the at least one second wheel brake cylinder 18b equipped brake circuit 22b ). Thus, in such a redundant braking system as a combination of two independent braking systems / partial braking systems of the above-described inactive mode can be executed, in which the driver by means of the actuation of the brake actuator 32 directly in the at least one first wheel brake cylinder 18a and / or in the at least one second wheel brake cylinder 18b can slow down.

In the braking device of 9 is the master cylinder 30 both on the at least one first wheel brake cylinder 18a as well as on the at least one second wheel brake cylinder 18b tethered.

10a to 10c show schematic representations of master cylinders, which are used in the braking devices described above.

All of the braking devices described above implement a (redundant) braking system that enables highly automated driving, with the driver simultaneously operating his brake actuator 32 has a standard brake feel (pedal feel). In addition, a sensing of the driver's braking request in all the braking devices described above is both by means of the first control device 10a the motorized piston-cylinder device 10 as the first pressure build-up unit and by means of the second control device 24a the by means of the components 24 . 24a and 26 realized second pressure buildup possible. Accordingly, a redundancy is realized in the implementation of the driver's brake request, which has no feedback on characteristic properties of the brake actuator 32 (in terms of its displacement / pedal travel and / or its adjustment / pedal force).

The redundant pressure buildup units created on the brake device by means of the present invention make it possible for a connection of the brake actuation element 32 on at least one wheel brake cylinder 18 . 18a or 18b can be waived. Furthermore, it is also possible to equip the respective brake device with the brake actuating element / brake pedal 32 often be waived. During operation of at least one of the pressure buildup units, complete driver decoupling is possible. The driver thus does not need significant force on the brake actuator 32 apply to a brake pressure build-up in the at least one wheel brake cylinder 18 to effect. Even a failure of one of the two pressure buildup units can be bridged by means of the other of the two pressure buildup units so that even in such a situation can be dispensed with a use of force or labor input of the driver. In addition, each of the braking devices described above is at least two-circuited, but this is not mandatory.

In all the embodiments described above, the first control device 10a a master status with respect to the second control device 24a and the second control device 24a a slave status with respect to the first control device 10a be permanently assigned. Likewise, the second control device 24a a master status with respect to the first control device 10a and the first control device 10a a slave status with respect to the second control device 24a be permanently assigned. However, it is also possible in all the embodiments described above, between the first control device 10a and the second control device 24a form a hierarchy, which with a predetermined frequency between a master status of the first control device 10a opposite the second control device 24a at a slave status of the second control device 24a opposite the first control device 10a and a master status of the second control device 24a opposite the first control device 10a at a slave status of the first control device 10a opposite the second control device 24a switches. In this way, the pressure buildup units can be used gently over a long life of the respective braking device.

The features of the embodiments described above can also be designed accordingly on hydraulic blocks. On a pictorial representation of such a hydraulic block is omitted here, however.

The embodiments described above may be operated by means of a corresponding method for operating a braking device of a vehicle. The method for operating a brake device of a vehicle can thus be developed according to the embodiments described above.

Also, the above-described embodiments can be made by executing a corresponding method for mounting a brake device to a vehicle. The method for mounting a brake device to a vehicle can thus be further developed according to the embodiments described above.

Furthermore, it should be pointed out here that the embodiments described above can be used in a large number of vehicles / motor vehicles, wherein an applicability of the respective embodiment is not limited to a specific vehicle type / type of motor vehicle.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The 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

• DE 102013205650 A1 [0002]

Claims (12)

Braking device for a vehicle comprising: a motorized piston-cylinder device ( 10 ) with at least one piston ( 12 ), which at least one pressure chamber ( 14 ) of the motorized piston-cylinder device ( 10 ) and by means of an engine ( 16 ) of the motorized piston-cylinder device ( 10 ) is adjustable such that a fillable with brake fluid volume of the displaced piston ( 12 ) limited pressure chamber ( 14 ) is variable, wherein at least one first wheel brake cylinder ( 18 . 18a ) of the brake device on the motorized piston-cylinder device ( 10 ), that by means of the operation of the engine ( 16 ) of the motorized piston-cylinder device ( 10 ) Brake fluid from the at least one pressure chamber ( 14 ) of the motorized piston-cylinder device ( 10 ) in the at least one first wheel brake cylinder ( 18 . 18a ) is transferable and at least one brake pressure in the at least one first wheel brake cylinder ( 18 . 18a ) is adjustable; characterized by at least one pump ( 24 ) with at least one pump motor ( 26 ), at which the at least one first wheel brake cylinder ( 18 . 18a ) and / or at least one second wheel brake cylinder ( 18b ) of the brake device is connected so that by means of an operation of the at least one pump motor ( 26 ) Brake fluid in the at least one first wheel brake cylinder ( 18 . 18a ) and / or the at least one second wheel brake cylinder ( 18b ) is pumpable and the at least one brake pressure in the at least one first wheel brake cylinder ( 18 . 18a ) and / or at least one brake pressure in the at least one second wheel brake cylinder ( 18b ) is adjustable. Braking device according to claim 1, wherein the at least one first wheel brake cylinder ( 18 . 18a ) via at least one first separating valve ( 20 ) on the motorized piston-cylinder device ( 10 ) and / or via at least one second isolation valve ( 28 ) on the at least one pump ( 24 ) is attached. Braking device according to claim 1 or 2, wherein the brake device comprises a master cylinder ( 30 ), and the at least one first wheel brake cylinder ( 18 . 18a ) via at least one third separating valve ( 34 ) on the master cylinder ( 30 ) is attached. Braking device according to claim 1, wherein the at least one first wheel brake cylinder ( 18a ) on the motorized piston-cylinder device ( 10 ) and the at least one second wheel brake cylinder ( 18b ) on the at least one pump ( 24 ) are connected. Braking device according to claim 4, wherein at least one wheel exactly one of the first wheel brake cylinder ( 18a ) and one of the second wheel brake cylinders ( 18b ) are assigned so that by means of the respective first wheel brake cylinder ( 18a ) a first braking torque on the associated wheel and by means of the respective second wheel brake cylinder ( 18b ) A second braking torque to the same associated wheel can be effected. Brake device according to one of the preceding claims, wherein the brake device comprises a first control device ( 10a ) and a second control device ( 24a ), and the engine ( 16 ) of the motorized piston-cylinder device ( 10 ) by means of the first control device ( 10a ) is controllable and the at least one pump motor ( 26 ) of the at least one pump ( 24 ) by means of the second control device ( 24a ) is controllable, and wherein the first control device ( 10a ) is formed such that the engine ( 16 ) of the motorized piston-cylinder device ( 10 ) by means of the first control device ( 10a ) even after a failure of the second control device ( 24a ) is controllable, and / or the second control device ( 24a ) is formed such that the at least one pump motor ( 26 ) of the at least one pump ( 24 ) by means of the second control device ( 24a ) even after a failure of the first control device ( 10a ) is controllable. Braking device according to claim 6, wherein the first control device ( 10a ) a master status with respect to the second control device ( 24a ) and the second control device ( 24a ) a slave status with respect to the first control device ( 10a ) or the second control device ( 24a ) a master status with respect to the first control device ( 10a ) and the first control device ( 10a ) a slave status with respect to the second control device ( 24a ) are permanently assigned. Braking device according to claim 6, wherein between the first control device ( 10a ) and the second control device ( 24a ) is formed with a predetermined frequency between a master status of the first control device ( 10a ) relative to the second control device ( 24a ) at a slave status of the second control device ( 24a ) relative to the first control device ( 10a ) and a master status of the second control device ( 24a ) relative to the first control device ( 10a ) at a slave status of the first control device ( 10a ) relative to the second control device ( 24a ) switches. A hydraulic block for a braking device of a vehicle, comprising: a plunger-receiving bore formed in the hydraulic block, in which a motorized piston-cylinder device ( 10 ) can be formed or is formed, that at least one piston ( 12 ) of the motorized piston-cylinder device ( 10 ), which at least one pressure chamber ( 14 ) of the motorized piston-cylinder device ( 10 ) by means of an engine ( 16 ) of the motorized piston-cylinder device ( 10 ) is adjustable such that a fillable with brake fluid volume of the displaced piston ( 12 ) limited pressure chamber ( 14 ) is variable, wherein at least one first wheel brake cylinder ( 18 . 18a ) is connectable or connected to the hydraulic block such that by means of the operation of the engine ( 16 ) formed in the plunger-receiving bore motorized piston-cylinder device ( 10 ) Brake fluid from the at least one pressure chamber ( 14 ) of the motorized piston-cylinder device ( 10 ) in the at least one first wheel brake cylinder ( 18 . 18a ) is transferable and at least one brake pressure in the at least one first wheel brake cylinder ( 18 . 18a ) is adjustable; characterized by at least one pump receiving bore formed in the hydraulic block, in which at least one pump ( 24 ) with at least one pump motor ( 26 ) can be formed or formed, wherein the at least one first wheel brake cylinder ( 18 . 18a ) and / or at least one second wheel brake cylinder ( 18b ) can be connected or connected to the hydraulic block such that by means of an operation of the at least one pump motor ( 26 ) of the at least one pump formed in the at least one pump receiving bore ( 24 ) Brake fluid in the at least one first wheel brake cylinder ( 18 . 18a ) and / or in the at least one second wheel brake cylinder ( 18b ) is pumpable and the at least one brake pressure in the at least one first wheel brake cylinder ( 18 . 18a ) and / or at least one brake pressure in the at least one second wheel brake cylinder ( 18b ) is adjustable. Method for operating a braking device of a vehicle with a motorized piston-cylinder device ( 10 ) and at least one pump ( 24 ) with the steps: operating the brake device at least temporarily in a first mode and at least temporarily in a second mode, wherein in the first mode, a brake pressure increase or brake pressure reduction in at least one first wheel brake cylinder ( 18 . 18a ) is effected by means of an engine ( 16 ) of the motorized piston-cylinder device ( 10 ) at least one piston ( 12 ) of the motorized piston-cylinder device ( 10 ), which at least one pressure chamber ( 14 ) of the motorized piston-cylinder device ( 10 ) is adjusted so that a volume which can be filled with brake fluid is adjusted by the displaced piston ( 12 ) limited pressure chamber ( 14 ), whereby brake fluid from the at least one pressure chamber ( 14 ) of the motorized piston-cylinder device ( 10 ) in the at least one first wheel brake cylinder ( 18 . 18a ) is transferred; and in the second mode, a brake pressure increase or brake pressure reduction in the at least one first wheel brake cylinder (FIG. 18 . 18a ) and / or in at least one second wheel brake cylinder ( 18b ) is effected by means of an operation of at least one pump motor ( 26 ) of the at least one pump ( 24 ) Brake fluid in the at least one first wheel brake cylinder ( 18 . 18a ) and / or in the at least one second wheel brake cylinder ( 18b ) is pumped. Method of mounting a brake device to a vehicle, comprising the steps of: mounting a motorized piston-cylinder device ( 10 ) of the brake device with at least one piston ( 12 ), which at least one pressure chamber ( 14 ) of the motorized piston-cylinder device ( 10 ) and by means of an engine ( 16 ) of the motorized piston-cylinder device ( 10 ) is adjusted such that a fillable with brake fluid volume of the displaced piston ( 12 ) limited pressure chamber ( 14 ) is changed on the vehicle; and bonding at least a first wheel brake cylinder ( 18 . 18a ) of the brake device on the motorized piston-cylinder device ( 10 ) that by means of the operation of the engine ( 16 ) of the motorized piston-cylinder device ( 10 ) Brake fluid from the at least one pressure chamber ( 14 ) of the motorized piston-cylinder device ( 10 ) in the at least one first wheel brake cylinder ( 18 . 18a ) is transferred and at least one brake pressure in the at least one first wheel brake cylinder ( 18 . 18a ) is changed; characterized by the steps of attaching at least one pump ( 24 ) of the brake device with at least one pump motor ( 26 ) on the vehicle; and tying the at least one first wheel brake cylinder ( 18 . 18a ) and / or at least one second wheel brake cylinder ( 18b ) of the brake device on the at least one pump ( 24 ) that by means of an operation of the at least one pump motor ( 26 ) Brake fluid in the at least one first wheel brake cylinder ( 18 . 18a ) and / or the at least one second wheel brake cylinder ( 18b ) is pumped and the at least one brake pressure in the at least one first wheel brake cylinder ( 18 . 18a ) and / or at least one brake pressure in the at least one second wheel brake cylinder ( 18b ) is changed. A method of mounting a brake device to a vehicle according to claim 11, wherein the at least one first wheel brake cylinder (11) 18a ) on the motorized piston-cylinder device ( 10 ) and the at least one second Wheel brake cylinder ( 18b ) on the at least one pump ( 24 ), and wherein at least one wheel of the vehicle exactly one of the first wheel brake cylinder ( 18a ) and one of the second wheel brake cylinders ( 18b ) are assigned so that by means of the respective first wheel brake cylinder ( 18a ) a first braking torque on the associated wheel and by means of the respective second wheel brake cylinder ( 18b ) A second braking torque to the same associated wheel can be effected.

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