阅读说明：本技术 用于运行机动车的制动系统的方法、制动系统 (Method for operating a brake system of a motor vehicle, brake system ) 是由 M·马夸特 于 2020-08-21 设计创作，主要内容包括：本发明涉及一种用于运行机动车(1)的方法,所述机动车具有至少一个带有发动机控制设备(3)的原动机(2)和制动系统(5),其中所述制动系统(5)具有至少一个车轮制动器(6)和至少一个带有放大器控制设备(9)的机电制动力放大器(7)以及具有行驶稳定性控制设备(10),所述行驶稳定性控制设备被构造用于影响制动系统(5)用以使所述机动车(1)的行驶状态稳定,其中在使制动系统(5)启动时激活所述控制设备中的至少一个并且鉴于故障消息的出现监控所述制动系统(5)。规定,只有在检测到所述机动车(1)的车辆运动之后才开始对所述发动机控制设备(3)进行监控。(The invention relates to a method for operating a motor vehicle (1) having at least one prime mover (2) with an engine control device (3) and a brake system (5), wherein the brake system (5) has at least one wheel brake (6) and at least one electromechanical brake booster (7) with a booster control device (9), and a driving stability control device (10) which is designed to influence the brake system (5) in order to stabilize a driving state of the motor vehicle (1), wherein at least one of the control devices is activated when the brake system (5) is activated, and the brake system (5) is monitored in view of the occurrence of a fault message. Provision is made for the engine control device (3) to be monitored to be started only after a vehicle movement of the motor vehicle (1) has been detected.)

1. A method for operating a motor vehicle (1) having at least one prime mover (2) with an engine control device (3) and a brake system (5), wherein the brake system (5) has at least one wheel brake (6) and at least one electromechanical brake booster (7) with a booster control device (9), and a driving stability control device (10) which is designed to influence the brake system (5) in order to stabilize the driving state of the motor vehicle (1), wherein at least one of the control devices is activated when the brake system (5) is activated and the brake system (5) is monitored in view of the occurrence of a fault message, characterized in that the monitoring of the engine control device (3) is started only after the detection of a vehicle movement of the motor vehicle (1).

2. Method according to claim 1, characterized in that the amplifier control device (9) and the driving stability control device (10) are monitored when activating the brake system (5).

3. Method according to any of the preceding claims, characterized in that the vehicle movement of the motor vehicle (1) is determined from the driving speed and/or acceleration of the motor vehicle (1).

4. Method according to one of the preceding claims, characterized in that for determining the vehicle movement of the motor vehicle (1), a signal of the driving stability control device (10) and/or of the engine control device (3) is detected.

5. Method according to any one of the preceding claims, characterized in that the activation of the brake system (5) is initiated depending on the operating state of a door lock or door contact (12) of the motor vehicle (1).

6. A motor vehicle (1) having a prime mover (2) to which an engine control device (3) is assigned, having a brake system (5), the brake system has an electromechanical brake booster (7) with a booster control device (9), a driving stability control device (10), the driving stability control device is designed to influence the brake system (5) to stabilize the driving state according to the current driving state of the motor vehicle (1), and having a communication network (11) via which the control devices (3, 9, 10) communicate with one another, characterized in that the amplifier control device (9), the driving stability control device (10) and/or further control devices are designed to carry out the method according to one of claims 1 to 5.

7. A motor vehicle according to claim 6, characterized in that the driving stability control device (10) has at least one acceleration sensor, speed sensor or rotational speed sensor.

8. A motor vehicle according to any one of claims 6 and 7, characterized in that the communication network (11) is a bus system.

9. A motor vehicle according to any of the preceding claims, characterized in that means are present for determining the activation of the braking system.

10. A motor vehicle according to any one of the preceding claims, characterized in that the device is a door lock or a door contact (12).

Technical Field

The invention relates to a method for operating a motor vehicle having at least one prime mover with an engine control device and a brake system, wherein the brake system has at least one wheel brake and at least one electromechanical brake booster with a booster control device, and having a driving stability control device which is designed to influence the brake system in order to stabilize a driving state of the motor vehicle, wherein at least one of the control devices is activated when the brake system is activated, and the brake system is monitored in view of the occurrence of a fault message.

The invention further relates to a brake system which is designed to carry out the above-described method.

Background

Brake systems and methods for operating the same are known from the prior art. The control device is assigned to a basic component of the motor vehicle. The electromechanical brake booster (bremskraftvertst ä rker) can thus be operated by the booster control device. The driving stability control device is used to intervene in the brake system in order to reestablish or ensure the driving stability of the motor vehicle, in particular in emergency situations. Such an amplifier control device is known, for example, as an ESP control device (ESP = electronic stability program). The amplifier control device is connected, for example, to a plurality of wheel brakes in order to operate or influence these independently of the braking demand in order to prevent the vehicle from slipping, the vehicle wheels from rotating or becoming jammed. The booster control device actuates the brake booster, for example, as a function of the braking demand, in order to set the hydraulic pressure required in the brake system to implement the braking demand. Furthermore, it is known to allocate an engine control unit to a prime mover (autotransmaschine) of a motor vehicle, which controls and monitors the prime mover, in particular in the form of an internal combustion engine. For this purpose, the communication networks, via which the control devices communicate with one another, are monitored, for example, in view of fault messages, which are transmitted from one control device to the other control device. When the brake system is activated, the amplifier control device and the driving stability control device are currently activated simultaneously, so that both control devices are initialized simultaneously and the respective software monitoring is started. However, since the engine control device is usually activated only when the ignition system of the motor vehicle has been operated, it remains switched off at this point in time. This results, for example, in the amplifier control unit not obtaining a signal from the engine control unit and thus in the generation of a fault message, which is, for example, entered into a fault memory and/or acoustically or visually communicated to a vehicle occupant of the motor vehicle.

Disclosure of Invention

The method according to the invention with the features of claim 1 has the following advantages: the brake system can be activated without forming a fault message caused by the engine control device, so that a false notification (Fehlmeldungen) is avoided. For this purpose, according to the invention, it is provided that the monitoring of the engine control device is started only after a vehicle movement of the motor vehicle is detected. The invention therefore provides that the monitoring of the engine control unit is only started when the vehicle is moved, in particular driven by the prime mover. This ensures that the engine control device is only detected when the ignition system of the motor vehicle has been operated, and that a message from the engine control device can be detected by one of the further control devices. This ensures that, when the brake system is activated, only the driving stability control unit and the amplifier control unit (Verst ä rkersteeger ä t) of the three control units mentioned are initialized and checked simultaneously, and therefore fault messages of the engine control unit can be eliminated.

As already mentioned above, the amplifier control device and the driving stability control device are preferably monitored when the brake system is activated. Thus, at start-up, two control devices assigned directly to the brake system are initialized and monitored and checked with regard to the functional capability.

Furthermore, it is preferably provided that a vehicle movement of the motor vehicle is determined as a function of the driving speed and/or the acceleration of the motor vehicle. It is thereby ensured that the ignition system of the motor vehicle has been operated and that the engine control device can be incorporated into the monitoring without the engine control device generating a fault message since it has not yet been activated. The driving speed and/or acceleration of the motor vehicle is preferably determined by a driving stability control device having one or more acceleration sensors and/or one or more speed sensors or rotational speed sensors, or such sensors arranged in or at the motor vehicle can be accessed.

Furthermore, it is preferably provided that signals of the driving stability control device and/or the engine control device are detected for determining a vehicle movement of the motor vehicle. The driving stability control device provides, in particular, the aforementioned signals relating to the driving speed and/or acceleration of the motor vehicle. For example, a driving signal is provided by the engine control device, which relates to a specific driving operation or a setpoint speed or a setpoint acceleration. These driving signals can be used, for example, to check the plausibility of the signals or data provided by the driving stability control device.

The activation of the brake system (inbertibnahme) is particularly preferably initiated as a function of the door position of the door of the motor vehicle. For this purpose, for example, the doors of the motor vehicle are continuously monitored. If it is determined that the door is opened or unlocked, the brake system has been activated so that it is already available when the driver of the motor vehicle is seated (platznehmen) in the driver's seat.

The brake system according to the invention with the features of claim 6 is characterized in that the amplifier control device and/or the driving stability control device are specifically arranged for implementing the method according to the invention. There is optionally a monitoring control device for monitoring the existing control devices, i.e. the driving stability control device, the amplifier control device and the engine control device, in view of the failure function (fehlerfunking). The monitoring control device is in particular designed to monitor a communication network, via which the control devices communicate with one another, in view of the occurrence or occurrence of a fault message, and in particular to detect the start-up of the motor vehicle and to activate the control device according to the invention. Further advantages and preferred features and combinations of features emerge from the preceding description and from the claims.

In particular, the driving stability control device has at least one acceleration sensor, speed sensor and/or rotational speed sensor, so that the aforementioned signals/data can be detected.

The communication network is particularly preferably designed as a bus system via which the control devices communicate with one another.

Furthermore, it is preferably provided that means are present for determining a desired activation of the brake system. In particular, the device is connected to the control device or at least one of the control devices in order to actuate the latter accordingly when a start is detected.

The device is particularly preferably designed as a door lock or as a door contact. If the door lock is unlocked or the door contacts are opened by shifting the door travel closed position (fahrzeugutufahrgeschlossenstenlung) into its open position, the brake system is activated by this means, as already described above.

Drawings

The invention shall be explained in more detail below on the basis of the drawings. For this purpose,

FIG. 1 shows a motor vehicle in a simplified illustration, an

Fig. 2 shows a flow chart for illustrating an advantageous method for operating a motor vehicle.

Detailed Description

Fig. 1 shows a simplified illustration of a motor vehicle 1, which motor vehicle 1 has an internal combustion engine as a prime mover 2, which internal combustion engine is operatively connected to at least two wheels of the motor vehicle for driving the same. An engine control device 3 is assigned to the internal combustion engine, which controls the internal combustion engine, for example, in accordance with an operation of a driver pedal 4. Furthermore, the motor vehicle 1 has a brake system 5, which brake system 5 comprises a plurality of wheel brakes 6, of which one wheel brake is assigned to each of the wheels of the motor vehicle 1, so that each wheel can be braked individually. The brake system 5 furthermore has an electromechanical brake booster 7 and a brake pedal 8 as well as a booster control device 9. In response to an actuation of the brake pedal 8, the booster control device 9 actuates the brake booster 7 for generating a hydraulic pressure in the hydraulically designed brake system 5, to which the wheel brakes 6 are applied. Each wheel brake 6 has an inlet valve and preferably also an outlet valve, which can be actuated individually in order to adjust the brake pressure or the brake force in a wheel-individual manner by means of the hydraulic pressure provided at the respective wheel brake. For this purpose, in particular, a driving stability control device 10 is provided, which continuously monitors the driving state of the motor vehicle during operation and, if necessary, actuates the wheel brakes 6 independently of the braking force demand to readjust or ensure the driving stability of the motor vehicle 1.

The control devices 3,9 and 10 are connected to one another via a communication network 11, which is not shown in greater detail here. The communication network 11 is, for example, a BUS (BUS) system to which the control device is connected. The control devices 3,9 and 10 are designed to monitor the operation of their own or of other components, for example also the operation of further control devices, in view of the occurrence of a fault, and to output a fault message when a fault is detected, said fault message being distributed or forwarded via the communication network 11.

Fig. 2 shows a flow chart for illustrating an advantageous method for operating the motor vehicle 1 and in particular the brake system 5.

In step S1, the method initiates, for example, a detection of an unlocking of a door of the motor vehicle 1.

In a following step S2, the optionally provided door contacts 12 assigned to the driver 'S door are monitored in view of whether the driver' S door (Fahrert ur) is open. If this is not the case (no (n)), refer back to step S1. However, if the door contact operation or the opening of the vehicle door is detected (yes (j)), a start instruction is output to the control devices 9 and 10 of the brake system 5 in the next step S3, so that the control devices 9 and 10 are initialized and started. The starting of the motor vehicle or at least the desired or possible starting of the motor vehicle is thus determined by means of the door contacts 12. The control devices 9 and 10 are initialized at the same time and are therefore also subjected to a program routine more or less simultaneously, which is used to monitor the respective control device and the motor vehicle in view of the fault message. If a fault message is detected, it is fed into the communication network 11. The fault message is then evaluated in step S4, for example by a superordinate control unit, in particular the monitoring control unit 13 as indicated in fig. 1. If a relevant fault message is present, a warning message is output, for example, to the driver of the motor vehicle 1 and/or optionally the components of the motor vehicle to which the fault message is associated are deactivated or placed in an emergency operating state.

Furthermore, after the activation of the control devices 9 and 10, the motor vehicle 1 is monitored in step S5 in view of whether an active driving movement has taken place. For this purpose, the data of the driving stability control device 10, which can have access to the data of the at least one acceleration sensor and/or speed sensor, are monitored, for example, in view of the following: whether a severe (ernszunehmend) vehicle movement of the motor vehicle 1 occurs, which indicates that the ignition system of the motor vehicle 1 has been operated.

Only if a driving movement is detected or determined (yes (j)), the engine control unit is also included in the monitoring in view of the fault message in a subsequent step S6. It is assumed that the engine control device 3 is likewise activated and initialized only when the motor vehicle 1 is moved, so that a fault message subsequently output by the engine control device is also relevant and is not based, for example, on the engine control device 3 not having been initialized at all.

Thus, by an advantageous method: a malfunction message due to the engine control device 3 that has not been activated or initialized is avoided.