Control device and method for operating at least one motorized brake pressure build-up device of a valve-equipped brake system of a vehicle

Abstract

The invention relates to a control device (10) for a motorized brake pressure build-up device (12) of a valve-equipped brake system of a vehicle, comprising an electronic device (10a) which is designed and / or programmed such that, by means of the electronic device (10a), taking into account at least one provided sensor signal (30) from at least one sensor (32a, 32b) of the brake system and / or the vehicle and using a valve switching model (34) stored in a memory (10b) of the control device (10), a valve switching information can be determined for at least one valve (16a - 16d) of the brake system controlled by means of an additional control device (22), which includes at least one predicted probable switching state of the respective valve (16a- 16d) during a predetermined future prediction time interval.wherein at least one motor control signal (26) can be output by means of the electronic device (10a) to a motor (12a) of the motorized brake pressure building device (12), taking into account the valve switching information. The invention also relates to a method for operating at least one motorized brake pressure building device (12) of a valve-equipped brake system of a vehicle.

Description

[0001] The invention relates to a control device for a motorized brake pressure build-up device of a valve-equipped brake system of a vehicle. The invention also relates to a control system for a valve-equipped brake system of a vehicle and a brake system for a vehicle. Furthermore, the invention relates to a method for operating at least one motorized brake pressure build-up device of a valve-equipped brake system of a vehicle. State of the art

[0002] From the prior art, such as DE 10 2016 226 325 A1, control devices for operating a motorized brake pressure build-up device of a valve-equipped brake system of a vehicle are known. Such a motorized brake pressure build-up device can, in particular, be an electromechanical brake booster, which can be / is positioned upstream of a master brake cylinder of the valve-equipped brake system equipped with it. Disclosure of the invention

[0003] The present invention provides a control device for a motorized brake pressure build-up device of a valve-equipped brake system of a vehicle with the features of claim 1, a control system for a valve-equipped brake system of a vehicle with the features of claim 9, a brake system for a vehicle with the features of claim 10 and a method for operating at least one motorized brake pressure build-up device of a valve-equipped brake system of a vehicle with the features of claim 11. Advantages of the invention

[0004] The present invention provides advantageous possibilities for optimizing the operation of a motorized brake pressure build-up device in a valve-equipped brake system of a vehicle, the at least one valve of which is controlled by a control device, while the motorized brake pressure build-up device is controlled by a control device separate from the control device. By optimizing the operation of the motorized brake pressure build-up device using the present invention, the hydraulic load and the mechanical load on the motorized brake pressure build-up device, particularly during the closing of the at least one valve controlled by the control device, can be reduced.The present invention takes into account that a particular load case for the motorized brake pressure build-up device occurs when, during operation of the motorized brake pressure build-up device, especially during brake pressure build-up effected by the motorized brake pressure build-up device, at least one valve of the brake system is closed by the control device in such a way that the hydraulic stiffness in at least a partial volume of the brake system's hydraulics increases significantly. By utilizing the present invention, the occurrence of pressure and / or force peaks in the hydraulics and / or in the mechanics of the motorized brake pressure build-up device can potentially be prevented by optimizing its operation. The present invention thus contributes significantly to extending the service life of the motorized brake pressure build-up device.

[0005] A significant advantage of the present invention is that its implementation does not require a network connection for communication between the control device and the actuator. Instead, a network connection between the control device and the actuator is optional when using the present invention. Therefore, the time delay that conventionally occurs in communication between the control device and the actuator is eliminated when using the present invention.

[0006] The motorized brake pressure build-up device used to implement the present invention can, for example, be an electromechanical brake booster (such as, in particular, an iBooster) located upstream of a master brake cylinder of the respective brake system, or a motorized piston-cylinder device, such as, specifically, a DPB (Decoupled Power Brake) device or a BWA (By-Wire Actuator) device. All types of motorized brake pressure build-up devices listed here can, in one embodiment of the present invention, be hydraulically connected in series with a modulation unit (ESP), wherein brake pressure build-up in the wheel brake cylinders is effected by means of the motorized brake pressure build-up device, while the modulation unit (specifically as an ABS function) prevents / relieves wheel lock-up of the respective vehicle. For this purpose, the modulation unit has at least one valve of the brake system and possibly......and at least one pump. As will become clear from the following description, the present invention can be used for a variety of different brake system types. However, it should be noted here that the above-mentioned embodiments of the motorized brake pressure building device are not to be interpreted as exhaustive.

[0007] In an advantageous embodiment of the control device, the electronic device is additionally designed and / or programmed such that, by means of the electronic device, taking into account the respective predicted probable switching state of the at least one valve during the future prediction time interval and using the stored valve switching model, a predicted hydraulic stiffness in at least a partial volume of a hydraulic system of the brake system during the future prediction time interval can also be determined as part of the valve switching information.The embodiment of the control device / its electronic unit described here can then, taking into account the predicted hydraulic stiffness in at least the partial volume of the hydraulic system, adjust the operation of the motorized brake pressure build-up device during the future prediction time interval in such a way that the occurrence of pressure and / or force peaks is avoided / prevented.

[0008] Preferably, the control device's memory contains information, via the valve switching model, indicating at which value of the at least one sensor signal the control device holds or switches the at least one valve of the brake system to a specific switching state, and / or information on how a specific switching state of the at least one valve affects the hydraulic stiffness in at least the partial volume of the hydraulic system. The control device can optionally predict / determine at least one probable switching state of the respective valve during the future forecast period and / or the hydraulic stiffness in at least the partial volume of the hydraulic system during the future forecast period, also using a comparatively inexpensive electronic device that requires relatively little installation space.

[0009] Preferably, the electronic device is designed and / or programmed such that, by means of the electronic device, the at least one motor control signal can be output to the motor, taking into account the requested target braking effect of the motorized brake pressure building device and additionally taking into account a predetermined respective target value range of at least one quantity representing a current operation and / or an actual braking effect of the motorized brake pressure building device, such that the at least one quantity is always within its assigned target value range, and wherein the respective target value range of the at least one quantity can be determined by means of the electronic device taking into account the valve switching information.In this way, the hydraulic load and / or the mechanical load of the motorized brake pressure building device can be optimized during the future forecast time interval so that pressure and / or force peaks cannot occur or can hardly occur.

[0010] For example, at least one parameter relating to the current operation and / or the actual braking effect of the motorized brake pressure building device can be a motor speed, a time gradient of the motor speed, a motor torque, a time gradient of the motor torque, a pressure that can be achieved by means of the motorized brake pressure building device in at least one partial hydraulic volume of the brake system, a time gradient of the pressure that can be achieved in at least the partial hydraulic volume, a braking torque that can be achieved by means of the motorized brake pressure building device, a time gradient of the achievable braking torque, a force that can be exerted by means of the motorized brake pressure building device, a time gradient of the exertable force, an adjustment travel of a component of the motorized brake pressure building device that can be adjusted by means of the motor,This could be an adjustment speed of the adjustable component and / or an adjustment acceleration of the adjustable component. The previously described determination of the respective target value range, taking into account the valve switching information, can thus be used for a large number of operating and / or braking parameters.

[0011] As a further advantageous embodiment of the control device, the electronic unit can be designed and / or programmed such that, taking into account the valve circuit information, it can be determined whether at least one predetermined operating limitation measure must be observed during a predetermined or defined first protection time interval when operating the motorized brake pressure build-up device, and, if applicable, that at least one motor control signal can be output to the motor by means of the electronic unit, taking into account the at least one predetermined operating limitation measure. The at least one operating limitation measure could, for example, be the limitation of kinetic energy stored in a drive train of the motorized brake pressure build-up device.This prevents the triggering of pressure and / or force peaks by means of kinetic energy, and thus prevents a sudden increase in load on the motorized brake pressure building device.

[0012] Alternatively or additionally, the electronic device can also be designed and / or programmed in such a way that, by means of the electronic device and taking into account the valve circuit information, it can be determined whether at least one first operating function of the motorized brake pressure building device is to be omitted during a predetermined or fixed second protection time interval, and, if applicable, that at least one motor control signal can be output to the motor by means of the electronic device in such a way that the execution of at least one first operating function by means of the motorized brake pressure building device is terminated at the beginning of the second protection time interval and / or prevented during the second protection time interval.Similarly, the electronic device can be designed and / or programmed to determine, taking into account the valve circuit information, whether at least one second operating function of the motorized brake pressure build-up device is to be replaced during a predetermined or defined third protection time interval. Furthermore, the electronic device can output at least one motor control signal to the motor in such a way that, instead of executing at least one of the second operating functions during the third protection time interval, a substitute function specified by the electronic device can be executed by the motorized brake pressure build-up device. Both measures described here advantageously contribute to extending the service life of the motorized brake pressure build-up device.

[0013] The advantages described above are also guaranteed in a control system for a valve-equipped brake system of a vehicle with a corresponding control device and the actuating device by means of which at least one valve of the brake system can be actuated.

[0014] The advantages listed above are also realized in a braking system for a vehicle, provided that the braking system is equipped with such a control system, the motorized brake pressure building device with the motor that can be controlled by means of at least one motor control signal from the electronic device of the control unit of the control system, and the at least one valve that can be controlled by means of the control unit of the control system.

[0015] Furthermore, implementing a corresponding method for operating at least one motorized brake pressure build-up device of a valve-equipped braking system of a vehicle also provides the advantages explained above. It is expressly noted that the method can be further developed according to the previously described embodiments of the control device. Brief description of the drawings

[0016] Further features and advantages of the present invention are explained below with reference to the figures. They show: Fig. 1 a schematic representation of an embodiment of the control device for a motorized brake pressure building device, or of a valve-equipped brake system of a vehicle equipped therewith; and Fig. 2 a flowchart to explain an embodiment of the method for operating at least one motorized brake pressure build-up device of a valve-equipped brake system of a vehicle. Embodiments of the invention

[0017] Fig. Figure 1 shows a schematic representation of an embodiment of the control device for a motorized brake pressure building device, or of a valve-equipped brake system of a vehicle.

[0018] In the embodiment of the Fig. 1. The control device 10 is designed, by way of example, to act as a motorized brake pressure build-up device 12, controlling a piston-cylinder device, specifically a by-wire actuator (BWA), located upstream of a master brake cylinder 14 of the valve-equipped brake system. The in Fig. The illustration of the motorized brake pressure build-up device 12 is not to be interpreted definitively. The motorized brake pressure build-up device 12 could, for example, also be an electromechanical brake booster upstream of the master brake cylinder 14, such as an iBooster, or a motorized piston-cylinder device integrated into the hydraulics of the valve-equipped brake system, such as a DPB (Decoupled Power Brake) device. However, the motorized brake pressure build-up device 12 is understood to be a device 12 equipped with its own motor 12a. The inclusion of a gearbox 12b, via which an (optional) adjustable piston 12c of the motorized brake pressure build-up device 12 is connected to the motor 12a, and / or a yaw rate sensor 12d, is not necessary.

[0019] All types of motorized brake pressure build-up devices listed here can advantageously interact with at least one valve 16a to 16d of the valve-equipped brake system when controlled by the control device 10 described below. The in Fig. The embodiment shown in Figure 1 of the at least one valve 16a to 16d of at least one brake circuit 18a and 18b connected to the master brake cylinder 14 as elements of a modulation unit 20, such as in particular an ESP system 20, is to be interpreted only as an example. As an alternative to the embodiment of Fig. 1 can also be a brake actuation element, such as a brake pedal, to which the master brake cylinder 14 can be mechanically connected.

[0020] As will become clear from the following description, the operation of the motorized brake pressure build-up device 12, effected by the control device 10, can be advantageously optimized with respect to the current switching state of the at least one valve 16a to 16d of the valve-equipped brake system, even if the at least one valve 16a to 16d is controlled / switched by an additional control device 22. The fact that the control device 10 is designed as a spatially separate unit from the control device 22 does not preclude this advantage. Likewise, the advantages of the control device 10 mentioned below do not require the controllability / switching of the at least one valve 16a to 16d of the valve-equipped brake system by means of the control device 10.Instead, the at least one valve 16a to 16d of the valve-equipped brake system can be controlled / switched exclusively by means of at least one valve control signal 24 issued by the control device 22, and not by means of a signal issued by the control device 20.

[0021] The control device 10 has an electronic unit 10a, which is designed and / or programmed such that at least one motor control signal 26 can be output to the motor 12a of the motorized brake pressure building device 12 by means of the electronic unit 10a. The output of the at least one motor control signal 26 to the motor 12a is carried out by means of the electronic unit 10a taking into account at least one predefined parameter 28 with regard to a requested target braking effect of the motorized brake pressure building device 12.The desired braking effect of the motorized brake pressure building device 12 can be requested, for example, by a driver of the vehicle, specifically by means of his actuation of the (not sketched) brake actuation element of the vehicle, by a speed control automatic system of the vehicle, such as in particular a driver assistance system, and / or by the additional control device 22 by means of the output of at least one predefined parameter 28.

[0022] The electronic device 10a is additionally designed and / or programmed such that, in addition to the at least one predefined parameter 28, at least one provided sensor signal 30 from at least one sensor 32a and 32b of the brake system and / or the vehicle can be evaluated / evaluated by means of the electronic device 10a. Furthermore, the control device 10 has a memory 10b on which a so-called valve switching model 34 for the at least one valve 16a to 16d of the brake system controlled by the control device 22 is stored / stored. By means of the valve switching model 34, the control device 10 / its electronic device 10a has "knowledge" of how the control device 22 will, with a high probability, control / switch the at least one valve 16a to 16d of the brake system in the future for a respective value of the at least one sensor signal 30, or at least one corresponding sensor signal.

[0023] Taking into account the at least one sensor signal 30 and using the valve switching model 34 stored in memory 10b, the electronic device 10a can determine / determine so-called valve switching information / valve switching state information, which includes at least one predicted probable switching state of the respective valve 16a to 16d during a predetermined future prediction time interval. This can also be described as the electronic device 10a being able to "predict" how the control device 22, which is spatially separate from the control device 10, will actuate / switch the at least one valve 16a to 16d of the brake system during the future prediction time interval in response to the at least one sensor signal 30, or the at least one corresponding sensor signal.In addition, at least one motor control signal 26 can be output to the motor 12a of the motorized brake pressure building device 12 by means of the electronic device 10a, taking into additional consideration the (specified / predicted) valve switching information.

[0024] In this way, the control device 10 / its electronic unit 10a ensures that, despite the "separate control" of the at least one valve 16a to 16d of the brake system by means of the control device 22, the current operation of the motorized brake pressure build-up device 12 is (essentially) always adapted to the "actual" switching state of the respective valve 16a to 16d. In particular, the electronic unit 10a can also "predict" a sudden necessary closing of the at least one valve 16a to 16d and subsequently optimize the current operation of the motorized brake pressure build-up device 12 accordingly. The control device 10 / its electronic unit 10a is thus (almost) always "known" when the switching state of the at least one valve 16a to 16d of the brake system leads to changes in stiffness in the hydraulics of the brake system.Therefore, the control device 10 / its electronic unit 10a can, if necessary, initiate preventive measures during the operation of the motorized brake pressure build-up device 12 in order to react advantageously to changes in hydraulic stiffness. As is also clear from the preceding description, the "knowledge" of the control device 10 / its electronic unit 10a regarding a probable activation / switching of the at least one valve 16a to 16d by means of the control device 22 during the future forecast time interval does not require any communication between the control device 10 and the separately configured control device 22. Thus, the control device 10 / its electronic unit 10a can react relatively early to an impending activation / switching of the at least one valve 16a to 16d by means of the control device 22, or to the future change in hydraulic stiffness.

[0025] The adaptation / optimization of the current operation of the motorized brake pressure build-up device 12 with respect to the actual switching state of the at least one valve 16a to 16d, achieved by means of the advantageous design / programming of the control device 10 / its electronic unit 10a, prevents / reduces in particular the occurrence of pressure and / or force peaks in the hydraulics. Therefore, when using the control device described here, the conventional risk of damage to the motorized brake pressure build-up device 12 and / or at least one other brake system component of the brake system equipped with it, due to pressure or force peaks, or a load triggered by them, is also significantly reduced.The advantageous design / programming of the control device 10 / its electronic device 10a thus extends the service life of the motorized brake pressure building device 12 and / or of at least one other brake system component of the brake system.

[0026] The at least one sensor 32a and 32b, based on whose sensor signal(s) 30 the valve switching information can be predicted by the electronic device 10a, can be, for example, at least one pressure sensor 32a, one (not shown) acceleration sensor and / or at least one wheel speed sensor 32b. For example, slippage at a single wheel of the vehicle equipped with the braking system can be detected based on the at least one sensor signal 30 from the at least one wheel speed sensor 32b. If necessary, the valve switching model 34 can be used to predict how the control device 22 will actuate / switch the at least one valve 16a to 16d of the braking system in response to the slippage at the respective wheel.In this way, the current operation of the motorized brake pressure building device 12 can be adapted to a control intervention / brake control intervention carried out in this way at an early stage, in particular even before a necessary closing of the respective valve 16a to 16d.

[0027] By means of the valve switching model 34, information is preferably stored in the memory 10b of the control device 10 indicating at which value of the at least one sensor signal 30 the control device 22 holds or switches the at least one valve 16a to 16b of the brake system in a specific switching state. A wheel slip model, preferably also stored in a memory unit 22a of the control device 22, can be stored as at least part of the valve switching model 34. The design / programming of the control device 10 / its electronic unit 10a for its advantageous prediction of the valve switching information is thus possible without significant effort.

[0028] As an advantageous further development, the electronic device 10a can additionally be designed and / or programmed such that, by means of the electronic device 10a, taking into account the respective predicted probable switching state of the at least one valve 16a to 16d during the future prediction time interval and using the stored valve switching model 34, a predicted hydraulic stiffness in at least a partial volume of the hydraulic system during the future prediction time interval can be determined / is determined as a (further) part of the valve switching information. This also allows the control device 10 / its electronic device 10a to more accurately maintain a desired actual braking effect of the motorized brake pressure build-up device 12.The further development of the electronic device 10a described here can be easily implemented by storing information on how a specific switching state of the at least one valve 16a to 16d affects the hydraulic stiffness in at least the partial volume of the hydraulics using the valve switching model 34.

[0029] The in Fig. The illustration of the configuration of at least one valve 16a to 16d as one high-pressure switching valve 16a per brake circuit 18a and 18b, one changeover valve 16b per brake circuit 18a and 18b, one wheel inlet valve 16c per wheel brake cylinder 36, and one wheel outlet valve 16d per wheel brake cylinder 36 is to be interpreted only as an example. Optionally, the control device 22 can also be designed / programmed to output not only the at least one valve control signal 24 to the at least one valve 16a to 16d, but also at least one motor control signal 38 to at least one further motor 40, such as a pump motor 40 of at least one pump 42 of the brake system. The equipment of the brake system of Fig. However, the use of a pump 42 per brake circuit 18a and 18b, a storage chamber 44 per brake circuit 18a and 18b and a check valve 46 per brake circuit 18a and 18b is not absolutely necessary.

[0030] The control device 10 can be an independent control unit for the motorized brake pressure build-up device 12. Alternatively, the control device 10 can also be a central vehicle control unit (VCU). Furthermore, the control device 10 and the actuating device 22 can be two spatially separate units of a control system, the valve-equipped brake system.

[0031] The control device 10 / its electronic equipment 10a can also be designed / programmed as a further development to perform at least one of the process steps described below.

[0032] Fig. Figure 2 shows a flowchart to explain an embodiment of the method for operating at least one motorized brake pressure build-up device of a valve-equipped brake system of a vehicle.

[0033] The feasibility of the method described below is not limited to any specific type of control device used, the motorized brake pressure build-up device controlled by it, and any cooperating additional control device by means of which at least one valve of the valve-equipped brake system is controlled or switched. A variety of different brake system types can be used as the valve-equipped brake system. However, it is expressly pointed out that the control device and the control device are to be understood as spatially separate devices / units.

[0034] In process step S1 of the process, at least one sensor signal is evaluated by means of an electronic device of the control unit used to control the motorized brake pressure build-up device in order to determine so-called valve switching information / valve switching state information. As valve switching information, the electronic device predicts at least one probable switching state of the at least one valve controlled / switched by the control unit during a future prediction time interval. The determination / prediction of the valve switching information in process step S1 is carried out by the electronic device taking into account the at least one sensor signal and using a valve switching model stored in a memory of the control unit for the at least one valve of the brake system controlled by the control unit.

[0035] Executing process step S1 thus enables a "prediction" of the valve switching information, in particular the probable switching state of the at least one valve during the future forecast time interval, even though the respective valve is not controlled / switched by the control device during the future forecast time interval. Preferably, the at least one valve is generally not controllable / switchable by the control device.

[0036] The at least one sensor signal can be provided in a process step S0 by at least one sensor of the brake system and / or the vehicle to at least the electronic control unit. Examples of at least one sensor suitable for outputting the at least one sensor signal have already been listed above. Possibilities for implementing the valve switching model have also already been described above.

[0037] The at least one sensor signal can potentially be output to the control device via the respective sensor in process step S0. Optionally, the control device can determine, at least in an (optional) process step S1', whether a situation exists in the hydraulics of the brake system that requires a specific control intervention / brake control intervention using the at least one valve of the brake system during the future forecast time interval, taking the at least one sensor signal into account. For this purpose, the control device can often perform similar processes in process step S1' as the electronics of the control device in process step S1. To enable the control device to execute these processes, the valve switching model can also be stored on a memory unit of the control device.The control intervention / brake control intervention deemed necessary can be, for example, an ABS intervention (anti-lock braking system intervention), an ESP intervention (electronic stability program), or a lateral dynamics control intervention.

[0038] In a further process step S2 of the procedure, the electronic device of the control unit determines which operating mode of the motorized brake pressure build-up device is advantageous with regard to the specified valve switching information, in particular with regard to the predicted probable switching state of the at least one valve during the future prediction time interval. At least one target value regarding a desired braking effect of the motorized brake pressure build-up device requested by a driver of the vehicle, by the vehicle's cruise control system, and / or by the control unit is also taken into account when executing process step S2.

[0039] Simultaneously with process step S2, an (optional) process step S2' can also be executed by the control device, in which the control device determines how the at least one valve of the brake system is (actually) switched by the control device during the execution of the control intervention / brake control intervention determined to be necessary within the future forecast time interval. Optionally, in process step S2', the control device can also define at least one target value with respect to a target function to be executed by at least one (additional) motorized brake system component during the future forecast time interval. The at least one (additional) motorized brake system component could, for example, be at least one pump of the brake system.The control device can also use processes identical / similar to those executed by the electronic device in process step S2 to carry out process step S2'.

[0040] In process step S3, following process step S2, the electronic device outputs at least one motor control signal to a motor of the motorized brake pressure build-up device in order to control the motor according to the advantageous operating mode during the future forecast time interval with regard to the specified valve switching information, in particular with regard to the predicted probable switching state of the at least one valve. The output of the at least one motor control signal to the motor in process step S3 is thus carried out taking into account both the at least one setpoint regarding the requested target braking effect of the motorized brake pressure build-up device and the specified / predicted valve switching information.

[0041] The control device can execute process step S3 almost simultaneously with process step S4, in which the control device actually actuates / switches the at least one valve as previously defined as required in process step S2'. The at least one (additional) motorized brake system component can also be actuated in process step S4 according to the at least one defined target value.

[0042] As in Fig.As illustrated by arrow A in Figure 2, process step S3 can be started before any message regarding a future control / switching of the at least one valve, potentially sent from the actuating device to the control device during the execution of process step S2, arrives at the control device. Like any communication between the actuating device and the control device, sending such a message would involve a delay, which would often lead to a delayed response from the control device.

[0043] When executing process step S3, for example, the at least one motor control signal can be output to the motor, taking into account the requested target braking effect of the motorized brake pressure build-up device and additionally considering a predetermined respective target value range of at least one parameter representing current operation and / or actual braking effect of the motorized brake pressure build-up device, such that the at least one parameter is within its assigned target value range. Preferably, in this case, the respective target value range of the at least one parameter is determined during process step S2, taking into account the valve switching information. The at least one parameter relating to the current operation and / or the actual braking effect of the motorized brake pressure build-up device can, for example,The following may be included: a motor speed, a temporal gradient of the motor speed, a motor torque, a temporal gradient of the motor torque, a pressure that can be achieved in at least one partial hydraulic volume of the brake system by means of the motorized brake pressure building device, a temporal gradient of the pressure that can be achieved in at least the partial hydraulic volume, a braking torque that can be achieved by means of the motorized brake pressure building device, a temporal gradient of the achievable braking torque, a force that can be exerted by means of the motorized brake pressure building device, a temporal gradient of the exertable force, an adjustment travel of a component of the motorized brake pressure building device that can be adjusted by means of the motor, an adjustment speed of the adjustable component and / or an adjustment acceleration of the adjustable component.This provides a multitude of possibilities for advantageously adapting the operation of the motorized brake pressure building device to the control / switching of the at least one valve.

[0044] Alternatively, in process step S2, taking into account the valve circuit information, it can be determined whether at least one predefined operating limitation measure must be observed during the operation of the motorized brake pressure build-up device during a predefined or defined first protection time interval. If applicable, in process step S3, at least one motor control signal is then output to the motor during the first protection time interval, taking into account the at least one predefined operating limitation measure. Alternatively or additionally, in process step S2, taking into account the valve circuit information, it can be determined whether at least one first operating function of the motorized brake pressure build-up device must be omitted during a predefined or defined second protection time interval.In this case, process step S3 involves outputting at least one motor control signal to the motor in such a way that the execution of at least one of the first operating functions by means of the motorized brake pressure build-up device is terminated at the beginning of the second protection time interval and / or prevented during the second protection time interval. Similarly, in process step S2, taking into account the valve circuit information, it can be specified whether at least one second operating function of the motorized brake pressure build-up device is to be replaced during a predetermined or fixed third protection time interval. In process step S3, the at least one motor control signal is then output to the motor in such a way that, instead of executing at least one of the second operating functions during the third protection time interval, a predetermined substitute function is executed by means of the motorized brake pressure build-up device. QUOTES INCLUDED IN THE DESCRIPTION

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

[0000] DE 10 2016 226 325 A1

[0002]

Claims

[1] Control device (10) for a motorized brake pressure build-up device (12) of a valve-equipped brake system of a vehicle, comprising: an electronic device (10a) which is designed and / or programmed in such a way that, by means of the electronic device (10a), at least one motor control signal (26) can be output to a motor (12a) of the motorized brake pressure build-up device (12) taking into account at least one preset variable (28) relating to a desired braking effect of the motorized brake pressure build-up device (12) requested by a driver of the vehicle, by an automatic speed control system of the vehicle and / or by an additional control device (32) of at least the braking system; characterized by , that the electronic device (10a) is additionally designed and / or programmed such that, by means of the electronic device (10a), taking into account at least one provided sensor signal (30) of at least one sensor (32a, 32b) of the braking system and / or the vehicle and using a valve switching model (34) stored in a memory (10b) of the control device (10), valve switching information can be determined for at least one valve (16a - 16d) of the braking system controlled by means of the additional control device (22), which valve switching information comprises at least one predicted probable switching state of the respective valve (16a- 16d) during a predetermined future forecast time interval; wherein the at least one motor control signal (26) can be output to the motor (12a) of the motorized brake pressure build-up device (12) by means of the electronic device (10a) with additional consideration of the valve switching information. [2] Control device (10) according to claim 1, wherein the electronic device (10a) is additionally designed and / or programmed such that, by means of the electronic device (10a), taking into account the respective predicted probable switching state of the at least one valve (16a - 16d) during the future forecast time interval and using the stored valve switching model (34), a predicted hydraulic stiffness in at least one partial volume of a hydraulic system of the brake system during the future forecast time interval can be additionally determined as part of the valve switching information. [3] Control device (10) according to claim 1 or 2, wherein by means of the valve switching model (34) on the memory (10b) of the control device (10) information as to the respective value of the at least one sensor signal (30) at which the control device (22) holds or transfers the at least one valve (16a - 16d) of the brake system in a specific switching state, and / or information as to how a specific switching state of the at least one valve (16a- 16d) affects the hydraulic stiffness in at least the partial volume of the hydraulic system, is stored. [4] Control device (10) according to one of the preceding claims, wherein the electronic device (10a) is designed and / or programmed such that by means of the electronic device (10a) the at least one motor control signal (26) can be output to the motor (12a) taking into account the requested desired braking effect of the motorized brake pressure build-up device (12) and additionally taking into account a predetermined respective desired value range of at least one variable representing a current operation and / or an actual braking effect of the motorized brake pressure build-up device (12) in such a way that the at least one variable lies in its associated desired value range, and wherein the respective desired value range of the at least one variable can be determined by means of the electronic device (10a) taking into account the valve switching information. [5] Control device (10) according to claim 4, wherein the at least one variable relating to the current operation and / or the actual braking effect of the motorized brake pressure build-up device (12) comprises a rotational speed of the motor (12a), a temporal gradient of the rotational speed of the motor (12a), a motor torque of the motor (12a), a temporal gradient of the motor torque of the motor (12a), a pressure that can be exerted by means of the motorized brake pressure build-up device (12) in at least one partial hydraulic volume of the braking system, a temporal gradient of the pressure that can be exerted in at least the partial hydraulic volume, a braking torque that can be exerted by means of the motorized brake pressure build-up device (12), a temporal gradient of the braking torque that can be exerted, a force that can be exerted by means of the motorized brake pressure build-up device (12), a temporal gradient of the force that can be exerted, an adjustment path of a component (12c) of the motorized brake pressure build-up device (12) that can be adjusted by means of the motor (10a),an adjustment speed of the adjustable component (12c) and / or an adjustment acceleration of the adjustable component (12c). [6] Control device (10) according to one of the preceding claims, wherein the electronic device (10a) is designed and / or programmed such that it can be determined by means of the electronic device (10a), taking into account the valve switching information, whether at least one predetermined operating limitation measure is to be observed during the operation of the motorized brake pressure build-up device (12) during a predetermined or fixed first protection time interval, and, if appropriate, the at least one motor control signal (26) can be output to the motor (12a) by means of the electronic device (10a), taking into account the at least one predetermined operating limitation measure. [7] Control device (10) according to one of the preceding claims, wherein the electronic device (10a) is designed and / or programmed in such a way that it can be determined by means of the electronic device (10a), taking into account the valve switching information, whether at least a first operating function of the motorized brake pressure build-up device (12) is to be omitted during a predetermined or fixed second protection time interval, and, if appropriate, the at least one motor control signal (26) can be output to the motor (12a) by means of the electronic device (10a) in such a way that an execution of at least the one first operating function by means of the motorized brake pressure build-up device (12) is terminated at the beginning of the second protection time interval and / or is prevented during the second protection time interval. [8] Control device (10) according to one of the preceding claims, wherein the electronic device (10a) is designed and / or programmed in such a way that it can be determined by means of the electronic device (10a), taking into account the valve switching information, whether at least one second operating function of the motorized brake pressure build-up device (12) is to be replaced during a predetermined or fixed third protection time interval, and, if appropriate, the at least one motor control signal (26) can be output to the motor (12a) by means of the electronic device (10a) in such a way that, instead of executing at least one second operating function during the third protection time interval, a replacement function respectively predetermined for the electronic device (10a) can be executed by means of the motorized brake pressure build-up device (12). [9] Control system for a valve-equipped braking system of a vehicle with: a control device (10) according to one of the preceding claims; and the control device (22), by means of which at least the at least one valve (16a - 16d) of the braking system can be controlled. [10] Braking system for a vehicle with: a control system according to claim 9; the motorized brake pressure build-up device (12) with the motor (12a) which can be controlled by means of the at least one motor control signal (26) of the electronic device (10a) of the control device (10) of the control system; and the at least one valve (16a - 16d) which can be controlled by means of the control device (22) of the control system. [11] Method for operating at least one motorized brake pressure build-up device (12) of a valve-equipped brake system of a vehicle, comprising the steps: Outputting at least one motor control signal (26) to a motor (12a) of the motorized brake pressure build-up device (12) by means of an electronic device (10a) of a control device (10) at least taking into account at least one default value (28) relating to a desired braking effect of the motorized brake pressure build-up device (12) requested by a driver of the vehicle, by an automatic speed control system of the vehicle and / or by an additional control device (22) of at least the braking system; characterized by the steps: Determining valve switching information by means of the electronic device (10a) taking into account at least one sensor signal (30) of at least one sensor (30a, 30b) of the braking system and / or the vehicle and using a predetermined valve switching model (34) for at least one valve (16a - 16d) of the braking system controlled by the additional control device (22), wherein at least one probable switching state of the respective valve (16a - 16d) during a predetermined future forecast time interval is forecast as valve switching information (S1); and Outputting the at least one motor control signal (26) by means of the electronic device (10a) with additional consideration of the valve switching information to the motor (12a) of the motorized brake pressure build-up device (12)(S2, S3).

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