阅读说明：本技术 机动车辆和用于操纵机动车辆的方法 (Motor vehicle and method for operating a motor vehicle ) 是由 洛威尔·库比克 托马斯·斯文森 查德·迈克尔·科特 肯尼斯·麦克休 埃里克·威克普 于 2021-03-15 设计创作，主要内容包括：本发明涉及一种机动车辆(1),其具有至少一个电动驱动器、至少一个驱动该驱动器的驱动控制模块(2)、至少一个电动驻车制动器(3)、以及至少一个在接收到驻车请求信号之后启动驻车制动器(3)的制动模块(4)。为了提供一种可成本更低、重量更轻、总体复杂度更低地制造的可电动驾驶的机动车辆(1),驱动控制模块(2)配置为在接收到或产生驻车请求信号之后或者在接收到或产生指示制动模块(4)的故障的错误信号之后启动驻车制动器(3)的至少一个制动致动器(5、6)。(The invention relates to a motor vehicle (1) having at least one electric drive, at least one drive control module (2) for driving the drive, at least one electric parking brake (3), and at least one brake module (4) for activating the parking brake (3) after receiving a parking request signal. In order to provide an electrically drivable motor vehicle (1) which can be produced at lower cost, is lighter in weight and has a lower overall complexity, the drive control module (2) is configured to activate at least one brake actuator (5, 6) of the parking brake (3) after receiving or generating a parking request signal or after receiving or generating an error signal which indicates a malfunction of the brake module (4).)

1. Motor vehicle (1, 12, 13) having at least one electric drive, at least one drive control module (2) for activating the drive, at least one electric parking brake (3), and at least one brake module (4) for activating the parking brake (3) after receiving a parking request signal,

it is characterized in that the preparation method is characterized in that,

the drive control module (2) is configured to activate at least one brake actuator (5, 6) of the parking brake (3) after receiving or generating the parking request signal or after receiving or generating an error signal indicating a malfunction of the brake module (4).

2. Motor vehicle (1, 12, 13) according to claim 1

It is characterized in that the preparation method is characterized in that,

there is also at least one recording module connected to the drive control module (2) and the brake module (4), the recording module being configured to record a parking operation request and to generate the parking request signal in relation to the parking operation request.

3. Motor vehicle (12) according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the drive control module (2) is connected to one of the brake actuators (5, 6) of the parking brake (3) and the brake module (4) is connected to the other of the brake actuators (5, 6) of the parking brake (3).

4. Motor vehicle (13) according to any of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the drive control module (2) is configured to activate the parking brake (3) to activate at least one function of the parking brake (3) that is independent of a parking operation.

5. Method for operating a motor vehicle (1, 12, 13), in particular according to one of the preceding claims, wherein a parking operation request is registered and a parking request signal related to the parking operation request is generated and sent to a vehicle-side brake module (4), and wherein at least one brake actuator (5, 6) of a vehicle-side electric parking brake (3) is activated by means of the brake module (4) after receipt of the parking request signal,

it is characterized in that the preparation method is characterized in that,

activating at least one of the brake actuators (5, 6) and/or at least another one of the brake actuators (5, 6) of the parking brake (3) by means of a vehicle-side electronic drive control module (2), the vehicle-side electronic drive control module (2) activating at least one vehicle-side electric drive after the drive control module (2) has received or generated the parking request signal or after the drive control module (2) has received or generated an error signal indicating a malfunction of the brake module (4).

6. The method of claim 5, wherein the first and second light sources are selected from the group consisting of,

it is characterized in that the preparation method is characterized in that,

-registering said parking operation request by means of a registration module connected to said drive control module (2) and said brake module (4), and-generating said parking request signal by means of said registration module.

7. The method according to claim 5 or 6,

it is characterized in that the preparation method is characterized in that,

-activating, by means of the drive control module (2), only one of the brake actuators (5, 6) of the parking brake (3), and-activating, by means of the brake module (4), only the other one of the brake actuators (5, 6) of the parking brake (3).

8. The method according to any one of claims 5 to 7,

it is characterized in that the preparation method is characterized in that,

activating at least one function of the parking brake (3) that is independent of a parking operation by means of the drive control module (2).

Technical Field

The invention relates to a motor vehicle having at least one electric drive, at least one drive control module for activating the drive, at least one electric parking brake, and at least one brake module for activating the parking brake after receiving a parking request signal. The invention further relates to a method for operating a motor vehicle, wherein a parking operation request is recorded and a parking request signal relating to the parking operation request is generated and transmitted to a vehicle-side brake module, and wherein at least one brake actuator of a vehicle-side electric parking brake is activated by means of the brake module after the parking request signal is received.

Background

Conventional motor vehicles with automatic transmissions have a drivable parking pawl as a primary safety device for maintaining a parking position of the motor vehicle, wherein the parking protection device is assisted by means of an electric parking brake of the motor vehicle. The use of such a parking pawl is associated with increased production costs and vehicle weight, which is disadvantageous in particular in motor vehicles that can be driven electrically.

US 9187068B 2 discloses a method for applying an electronic parking brake system of a vehicle. The parking request is detected by a first vehicle control module. A parking command is sent by the first vehicle control module to the control module for the electric brakes and to the second vehicle control module in order to request actuation of the electric parking brake system. When the control module for the electric brake receives a parking command from the first vehicle control module, an actuation signal is sent from the control module for the electric brake to the motor windings of the electric parking brake system in order to actuate the motor windings. An actuation state signal is sent from the control module for the electric brake to the second vehicle control module indicating that an actuation signal has been sent from the control module for the electric brake to the motor winding in order to actuate the motor winding. The position of the motor windings is recorded to determine whether the motor windings have actuated in response to the actuation signal. When the position of the motor windings indicates that the motor windings have been actuated, a report will be displayed indicating that the electronic parking brake system has been applied. The second vehicle control module may actuate a backup brake to hold the vehicle if the motor windings are not actuated by the actuation signal.

US 9873414B 2 discloses a parking brake system for a vehicle having two control units by means of which two actuators are controllable, the actuators being designed to actuate respective wheel brakes, wherein the control units are connected to a power source by separate lines. Only one control unit is connected to the operating device. The operating device is designed to transmit a signal for actuating the wheel brakes to the control unit. The control unit is designed to control at least one of the actuators in dependence on a signal for actuating the wheel brake. If the control unit connected to the operating device has an operation failure, the control unit not connected to the operating device may operate in the automatic mode. If the signal transmission from the operating device to the control unit connected thereto is disturbed, the vehicle can be protected and released against a side slip.

US 9428159B 2 discloses an electronic control unit for a brake system of a motor vehicle, having at least one interface for a parking brake operating switch and at least two activation circuits for an electronic parking brake actuator. The control unit has two or more separate processing units directly connected to each other by a data bus. The use of two activation circuits and two separate processing units ensures that at least one actuator can still be activated in the event of a malfunction. Since the processing units are independent of each other and directly connected to each other by means of a data bus, one processing unit can normally control all the actuators of the parking brake. In this case, the other processing unit can take over the parking brake control only if an error message occurs via the data bus or if a regularly occurring message of the other processing unit with regard to the correct function does not occur.

US 8752908B 2 discloses a parking brake system for a motor vehicle, having an actuating element and at least two electromechanical actuators for generating a parking brake force on in each case one wheel of the motor vehicle, wherein the electromechanical actuators in each case have a wheel electronics unit, and wherein the actuating element is connected by means of at least one first signal line to the wheel electronics unit of a first electromechanical actuator by a control unit and by means of a second signal line to the wheel electronics unit of a second electromechanical actuator by a further control unit. By means of at least one third signal line, it is provided that the operating element is connected directly to the wheel electronics unit or respectively to one of the electromechanical actuators and conveys the driver's intention. Thus, at least three separate information lines and a data path with information for applying or releasing the parking brake are provided, wherein the three information reach each wheel electronics unit of the electromechanical actuator in an error-free state through different data paths.

KR 101298138B 1 discloses a brake system for a vehicle and a control method thereof in order to actuate an electronic parking brake to stably decelerate the vehicle based on the actuation of a brake pedal when a main brake system fails during driving. The brake system has a wheel actuator, a first brake control device, a second brake control device, a parking brake, a wheel speed sensor, and a brake pedal position sensor. The respective wheel actuators are actuated and the front wheels are decelerated in accordance with a control signal of the first brake control device. The first brake control device controls operation of the wheel actuator. The second brake control device is connected to the first brake control device and controls operation of the parking brake. The parking brake is controlled by the second brake control means, and generates or cancels a parking braking force at the rear wheel. A wheel speed sensor records the speed of the drive wheel and a brake pedal position sensor records the distance of travel of the brake pedal. When the first brake control means has a failure, the second brake control means controls the operation of the electronic parking brake based on the moving stroke of the brake pedal.

Disclosure of Invention

The object of the present invention is to provide an electrically drivable motor vehicle which can be manufactured at lower cost, with lower weight and with lower overall complexity.

According to the invention, this object is achieved by a motor vehicle having the features of claim 1, whose drive control module is configured to activate at least one brake actuator of the parking brake after receiving or generating a parking request signal or after receiving or generating an error signal indicating a malfunction of the brake module.

It is to be noted that the features and measures listed separately in the following description may be combined with each other in any technically reasonable manner and disclose further embodiments of the invention. The description further particularly features and specifies the invention in connection with the drawings.

According to the invention, the drive control module can be used to activate at least one brake actuator of the parking brake independently of the operating or functional state of the brake module or in dependence on the presence of an operating fault or malfunction of the brake module. In the second alternative mentioned, the drive control module serves as a safeguard in the event of a failure of the brake module in order to be able to hold the motor vehicle firmly in the stationary parking state. A failure of the brake module is to be understood here as meaning a failure of at least one brake actuator of the parking brake which is activated by the brake module, as a result of which the motor vehicle can move out of the parking standstill under gravity from the inclined floor without intervention of the drive control module. When this malfunction of the brake module occurs, the braking force generated by the at least one brake actuator actuated by the brake module is therefore insufficient to fix the motor vehicle in the stationary parked state.

Since the motor vehicle is fixed in the stationary parking state by means of the drive control module according to the invention, it is possible to dispense with the installation of a conventional parking pawl, which makes the production of the motor vehicle more cost-effective, in particular since the weight of the motor vehicle is reduced in any case by means of the drive control module provided, and the overall complexity of the motor vehicle is reduced.

The electric drive of a motor vehicle according to the invention can have at least one central electric motor by means of which at least two wheels of the motor vehicle can be driven, or at least two or four wheel-adjacent electric motors by means of which a single wheel can be driven. The electric drive may be part of a hybrid electric drive. In this case, the drive control module may be a hybrid powertrain control module.

The drive control module of a motor vehicle according to the invention can receive and process a parking request signal, which for this purpose is generated by a further electronic module of the motor vehicle, by means of which the parking request entered by means of a manually operated selector switch or other type of input unit of the motor vehicle can be registered. Alternatively, the drive control module itself may be configured to record a parking request input via a manually operated selector switch or other type of input unit of the motor vehicle and generate a parking request signal related to the parking request. The drive control module can have at least one evaluation electronics unit, with which at least one software can be executed to implement the functions of the drive control module.

Furthermore, the drive control module of the motor vehicle according to the invention can receive and process an error signal which indicates a malfunction of the brake module and which, for this purpose, is generated by a further electronic module of the motor vehicle, wherein the electronic module can read out, for example, sensors arranged on the respective wheel brakes in order to be able to determine whether the wheel brakes or their brake actuators have been activated sufficiently to hold the motor vehicle in a stationary parking state. Alternatively, the motor vehicle sideslip from the parking stop can be recorded in a sensory manner, for example by means of an existing vehicle sensor system, and evaluated by means of an electronic module in order to generate an error signal if required. Alternatively, the drive control module itself can be configured to read out the respective sensor or the respective sensor system and to evaluate the respective sensor signal, in order to be able to generate the error signal itself and to process it for activating the at least one brake actuator.

An electric parking brake has, for example, two wheel brakes, each having a brake actuator, which are arranged on a common wheel axis. In normal operation of the brake module, the brake module activates the parking brake after receiving the parking request signal, thereby activating the at least one brake actuator and thus maintaining the motor vehicle in a stationary parking state.

The motor vehicle may be, for example, an electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle. The motor vehicle may be a passenger vehicle or a utility vehicle.

According to an advantageous embodiment, the motor vehicle has at least one recording module connected to the drive control module and the brake module, which recording module is configured to record a parking operation request and to generate a parking request signal related to the parking operation request. Therefore, the parking request signal is not generated by means of the drive control module. The recording module may be connected to a manually operable selector switch or another type of input unit of the motor vehicle in order to be able to record a manual parking request at the selector switch or the input unit and to generate an associated parking request signal. For this purpose, the recording module can have at least one sensor arranged on the selector switch or the input unit and at least one evaluation electronics unit connected to the sensor. The recording module can be implemented partially or completely by means of vehicle components which are provided in any case, in which the corresponding software is implemented, or as a separate component with which, for example, motor vehicles can also be retrofitted.

Another advantageous embodiment provides that the drive control module is connected to one brake actuator of the parking brake and that the brake module is connected to another brake actuator of the parking brake. In this way, in the event of a failure of the brake module, the motor vehicle can be held firmly in the parking stationary state by the drive control module, and in the event of a failure of the drive control module, the motor vehicle can be held firmly in the parking stationary state by the brake module. Thus, the drive control module and the brake module are fixed to each other.

According to a further advantageous embodiment, the drive control module is configured to activate the parking brake for activating at least one function of the parking brake that is independent of a parking operation. In this way, the drive control module can also be used as a hill start assist device or the like, for example, or a hill start assist function or the like of the brake module can be ensured.

The object is also achieved by a method having the features of claim 5, according to which at least one brake actuator and/or at least one further brake actuator of a parking brake is activated by means of a vehicle-side electronic drive control module, which activates at least one vehicle-side electric drive after the drive control module has received or generated a parking request signal or after the drive control module has received or generated an error signal indicating a malfunction of the brake module.

The advantages mentioned above in connection with the motor vehicle are correspondingly related to the method. In particular, the method can be carried out using a motor vehicle according to one of the above-described embodiments or a combination of at least two of these embodiments with one another. The parking operation request may be recorded by the drive control module. The parking request signal can be generated accordingly by means of the drive control module.

According to an advantageous embodiment, the parking operation request is registered by means of a recording module connected to the drive control module and the brake module, and the parking request signal is generated by means of the recording module. The advantages mentioned above with reference to the respective embodiment of the motor vehicle are correspondingly related to this embodiment.

A further advantageous embodiment provides that only one brake actuator of the parking brake is activated by means of the drive control module and that only the other brake actuator of the parking brake is activated by means of the brake module. The advantages mentioned above with reference to the respective embodiment of the motor vehicle are correspondingly related to this embodiment.

According to a further advantageous embodiment, at least one function of the parking brake, which is independent of the parking operation, is activated by means of the drive control module. The advantages mentioned above with reference to the respective embodiment of the motor vehicle are correspondingly relevant to this embodiment.

Drawings

Further advantageous embodiments of the invention are disclosed in the dependent claims and in the following description of the drawings. In the drawings:

fig. 1 shows a block diagram of an exemplary embodiment of a motor vehicle according to the invention;

FIG. 2 shows a block diagram of another exemplary embodiment of a motor vehicle according to the present invention; and

fig. 3 shows a block diagram of another exemplary embodiment of a motor vehicle according to the present invention.

In the different figures, identical parts are always provided with the same reference numerals, so that they are generally also described only once.

Detailed Description

Fig. 1 shows a block diagram of an exemplary embodiment of a motor vehicle 1 according to the invention, the motor vehicle 1 having an electric drive (not shown), a drive control module 2 which activates the drive, an electronic parking brake 3, and a brake module 4 which activates the parking brake 3 after receiving a parking request signal.

The drive control module 2 is designed as a hybrid drive train control module. The parking brake 3 has a right brake actuator 5 associated with a right rear wheel (not shown) of the motor vehicle 1 and a left brake actuator 6 associated with a left rear wheel (not shown) of the motor vehicle 1. The brake brakes 5 and 6 are connected to the brake module 4 via a connection V.

The brake module 4 is supplied with electrical energy via the connection V by means of a main power supply 7, wherein the main power supply 7 is, for example, a 12V vehicle battery. The drive control module 2 is supplied with electrical energy via a secondary power supply 8 via a connection V, wherein the secondary power supply 7 is, for example, a 12V battery.

Furthermore, the drive control module 2 and the brake module 4 are connected via a connection V to a switch 9, via which switch 9 a request for activating the parking brake 3 can be registered. Furthermore, the drive control module 2 is connected via a connection V to an operating selector switch 10 of the motor vehicle 1, by means of which selector switch 10 a parking request can be manually entered.

In addition, the drive control module 2 is connected to the brake module 4 via a connection V of a CAN bus (not shown) of the motor vehicle 1. Furthermore, the drive control module 2 is connected to a speed sensor 11 via a connection V, by means of which speed sensor 11 the instantaneous vehicle speed can be registered. Furthermore, the drive control module 2 is connected to a connection V by means of which the brake actuators 5 and 6 are connected to the brake module 4.

The drive control module 2 is configured to activate the two brake actuators 5 and 6 of the parking brake 3 after receiving a parking request signal from the operation selector switch 10 or from the switch 9 and after receiving or generating an error signal indicating a malfunction of the brake module 4. The operation selector switch 10 or the switch 9 may have a recording module (not shown) connected to the drive control module 2 and the brake module 4, the recording module being configured to record a parking operation request input via the operation selector switch 10 or the switch 9 and generate a parking request signal related to the parking operation request.

Fig. 2 shows a block diagram of another exemplary embodiment of a motor vehicle 12 according to the present invention. The motor vehicle 12 differs from the exemplary embodiment shown in fig. 1 in that the drive control module 2 is connected by a connection V only to the right brake actuator 5 and the brake module 4 is connected by a connection V only to the left brake actuator 6. In this way, if there is a parking request signal, only the right brake actuator 5 is activated by the drive control module 2, and only the left brake actuator 6 is activated by the brake module 4.

Fig. 3 shows a block diagram of another exemplary embodiment of a motor vehicle 13 according to the invention. The motor vehicle 13 differs from the exemplary embodiment shown in fig. 1 in that the drive control module 2 is directly connected to the brake actuators 5 and 6 via a connection V, and in that the drive control module 2 is configured to activate the parking brake 3 to activate at least one function of the parking brake 3 which is independent of a parking operation. Furthermore, fig. 3 shows a wheel speed sensor wssx4 connected to the brake module 4.

List of reference numerals:

1 Motor vehicle

2 drive control module

3 parking brake

4 brake module

5 brake actuator

6 brake actuator

7 main power supply

8 Secondary power supply

9 switch

10 operation selector switch

11 speed sensor system

12 Motor vehicle

13 Motor vehicle

V-shaped connecting piece