DE102024207899B3 - Method for determining a switching state of a parking lock, method for operating a vehicle, device for data processing, computer program, computer-readable data carrier and vehicle - Google Patents

Abstract

The invention relates to a method (26) for determining a switching state of a parking lock (2) having the features of claim 1, a method (27) for operating a vehicle (1) having the features of claim 8, a device (3) for data processing having the features of claim 9, a computer program (5) having the features of claim 10, a computer-readable data carrier (4) having the features of claim 11 and a vehicle (1) having the features of claim 12.

Description

Technical area

The invention relates to a method for determining a switching state of a parking lock, a method for operating a vehicle, a device for data processing, a computer program, a computer-readable data carrier and a vehicle.

State of the art

The DE 10 2018 006 098 A1 relates to a parking lock module with a position sensor, wherein the position sensor is provided to determine a switching state of a parking lock of the parking lock module.

The printed matter DE 10 2022 206 205 A1 relates to a method for monitoring the movement of an actuating piston for engaging or disengaging a parking lock of a vehicle.

A particular disadvantage of the state-of-the-art devices is the lack of alternatives.

Description of the invention, task, solution, advantages

It is the object of the present invention to provide a solution which at least partially overcomes the disadvantages mentioned above.

The problem is solved by the subject matter of the independent claims. Embodiments disclosed for the method for determining a switching state of a parking lock are, of course, also transferable to the method for operating a vehicle, the data processing device, the computer program, and the computer-readable data carrier, and vice versa.

• - Empfangen von Messdaten, wobei es sich bei den Messdaten um Akustikdaten und/oder Beschleunigungsdaten handelt,
• - Bestimmen eines Schaltzustands der Parksperre auf Basis der Messdaten.

An embodiment of the invention relates to a method having the features of claim 1. The method according to the invention is in particular a method for determining a switching state of a parking lock, comprising:

• - Receiving measurement data, whereby the measurement data is acoustic data and/or acceleration data,
• - Determining a switching state of the parking lock based on the measured data.

This at least partially overcomes the disadvantages of the prior art mentioned above. In other words, the switching state of the parking lock can be determined without a position signal or a position sensor, or can be determined without a position sensor. The switching state of the parking lock can also be determined independently of a position signal or a position sensor, even if one is present to determine the switching state.

It is particularly advantageous if the method serves to prevent component damage, in particular component damage to the parking lock and/or to components that interact with the parking lock.

It is also advantageous if the parking lock comprises a parking lock mechanism and/or an actuator. The parking lock mechanism can preferably be transferred from one switching state to another switching state and back again by means of the actuator. The actuator is preferably an electric actuator, which in particular comprises an electric motor, which is particularly preferably designed as a permanently excited synchronous machine, a stepper motor, or a mechanically commutated DC motor.

Furthermore, it is preferred if the parking lock, in particular the parking lock mechanism and/or the actuator, comprises a position sensor by means of which the switching state of the parking lock can be determined. Such a position sensor or the position sensor will be discussed in more detail elsewhere. However, such a position sensor is not absolutely necessary due to the method and devices according to the invention.

In principle, it is preferred if, within the scope of the disclosure of the invention, the term parking lock can be understood to mean, in particular, the parking lock mechanism and/or the actuator.

The parking lock is preferably designed such that a locking state is present in a first switching state by means of the parking lock and/or an unlocking state is present in a second switching state. The locking state preferably means a state in which a drive, in particular of a vehicle, is blocked. The unlocking state preferably means a state in which a drive, in particular of a vehicle, is free of blockage. The locking state can also mean a parked state of the vehicle. The locking state can preferably mean a state in which a vehicle is prevented from rolling away unintentionally. Blocking or locking preferably means mechanical blocking or locking.

However, the switching state to be determined by the method may preferably mean an irregular switching state, which preferably differs from the first and the second switching state.

Preferably, determining the switching state comprises detecting the switching state. Preferably, the switching state is detected when the measured data values are below or above a threshold. Preferably, the switching state is detected when the measured data values are above a first and below a second threshold.

Preferably, the switching state is determined when the measured data values correspond to or at least resemble values of comparison data that are characteristic of the switching state. These comparison data may have been previously determined experimentally and, in particular, stored on a storage medium.

A preferred embodiment is characterized in that the switching state is a switching state which corresponds to an incomplete locking state of the parking lock.

It is also preferable if the irregular switching state is the incomplete blocking state.

In other words, it is a method for detecting a switching state of a parking lock that corresponds to an incomplete locking state of the parking lock or for detecting an irregular switching state.

Furthermore, it is advantageous if the incomplete locking state corresponds to a state of the parking lock in which a drive that can be locked or blocked by means of the parking lock is not locked or blocked, but the parking lock is in mechanical contact with the drive, so that damage to the drive or the parking lock can be caused by operation of the drive in the incomplete locking state of the parking lock.

In other words, the method according to the invention can be used to determine a switching state of the parking lock that can cause damage.

Furthermore, it is advantageous if the drive is a component or assembly of a drive train or a drive train of a vehicle. Preferably, the drive can be a transmission or an electric traction motor.

A further preferred embodiment is characterized in that the measurement data are determined by means of an acceleration sensor and/or an acoustic sensor.

It is also preferable if vibrations and/or structure-borne noise, particularly from components or assemblies of the parking lock and/or the drive, can be measured or are measured using the acceleration sensor, preferably to determine the measurement data. For this purpose, it is preferred if the acceleration sensor is arranged, particularly directly, on the components or assemblies. Independently of this, multiple acceleration sensors can be provided.

Furthermore, it is advantageous if sound, particularly that emitted by components or assemblies of the parking lock and/or the drive, can be measured or is measured using the acoustic sensor, preferably to determine the measurement data. For this purpose, it is preferred if the acoustic sensor is located near, particularly in the immediate vicinity of, the components or assemblies. Independently of this, multiple acoustic sensors can be provided.

Furthermore, it is advantageous to use both an acceleration sensor and an acoustic sensor to determine the measurement data. This allows for more accurate measurement data and increases the functional reliability of the process.

The acoustic sensor is preferably a microphone.

The acceleration sensor is preferably a sensor with piezo elements or a capacitive acceleration sensor.

A further preferred embodiment is characterized in that the method is operated redundantly to a further method, that the further method determines the switching state of the parking lock on the basis of further measurement data, that the further measurement data are position data which are determined in particular by means of a position sensor.

It is also preferable if such a position sensor is part of the parking lock and is designed in particular to determine the position of the parking lock, whereby in particular the switching state of the parking lock can be deduced.

Furthermore, it is advantageous if the method according to the invention is used when the position sensor is defective or provides implausible or erroneous position data. Preferably, the method according to the invention is only used when the position sensor is defective or provides implausible or erroneous position data.

Furthermore, it is advantageous if the method according to the invention is used in parallel with the further method in order to increase the functional reliability and/or to check the switching states determined by means of the two methods for plausibility.

A further preferred embodiment is characterized in that the acoustic data are representative of sound generated by the parking lock and/or are characteristic of the switching state of the parking lock, and/or that the acceleration data are representative of vibrations and/or accelerations generated by the parking lock and/or are characteristic of the switching state of the parking lock.

It is also preferable if the acoustic data is representative of a sound level and/or a temporal progression of a sound level and/or a sound frequency and/or a sound pattern. In other words, "sound" can refer to a sound level and/or a temporal progression of a sound level and/or a switching frequency and/or a sound pattern. The sound level and/or the temporal progression of the sound level and/or the sound frequency and/or the sound pattern can be present as values of the measured data.

Furthermore, it is advantageous if the acceleration data is representative of a vibration amplitude and/or a temporal profile of a vibration amplitude and/or a vibration pattern and/or a vibration frequency. The vibration amplitude and/or the temporal profile of the vibration amplitude and/or the vibration pattern and/or the vibration frequency can be present as values of the measured data.

A further preferred embodiment is characterized in that the position data is representative of a position of the parking lock, which is created by the parking lock and/or is characteristic of the switching state of the parking lock.

In principle, it is preferable that the terms “based on” can also mean “based on” and/or “depending on” and/or “in response to”, and vice versa.

• - Generieren von Sicherheitsdaten auf Basis des festgestellten Schaltzustands, wobei die Sicherheitsdaten insbesondere charakteristisch für eine Initialisierung eines Anhaltens eines Fahrzeugs und/oder einer Initialisierung eines Warnsignals sind.

A further preferred embodiment is characterized in that the method further comprises:

• - generating safety data on the basis of the detected switching state, wherein the safety data are in particular characteristic of an initialization of a stopping of a vehicle and/or an initialization of a warning signal.

This increases functional reliability and significantly reduces the risk of damage.

It is also preferable if the safety data initiates a stop of the vehicle by initiating a braking process and/or deactivating the vehicle's drive. Furthermore, the vehicle can be steered to a safe location on the roadway on which it is located.

Furthermore, it is advantageous if the warning signal is an acoustic and/or visual warning signal to warn the passengers of the vehicle and/or other vehicles, especially drivers or passengers of other vehicles. Furthermore, the warning signal can also be transmitted wirelessly to other vehicles as a warning to prevent accidents.

In principle, it is preferred if the data is available in analog or digital form.

• - Anhalten des Fahrzeugs auf Basis der Sicherheitsdaten.

A further solution to the problem is provided by the subject matter having the features of claim 8. It is preferably a method for operating a vehicle, comprising a method according to the invention for determining a switching state of a parking lock and in particular further comprising:

• - Stopping the vehicle based on safety data.

The method for operating a vehicle thus offers the same advantages as the method for determining a switching state of the parking lock.

A further solution to the problem is provided by the subject matter having the features of claim 9. It is preferably a data processing device comprising a processor configured to execute one of the methods according to the invention. Thus, the data processing device has the same advantages as the method according to the invention.

It is also preferable if the data processing device is a computer or a vehicle control unit.

A further solution to the problem is provided by the subject matter having the features of claim 10. It is preferably a computer program comprising instructions that, when executed by a computer, cause the computer to carry out the method according to the invention. Thus, the computer program has the same advantages as the method according to the invention.

A further solution to the problem is provided by the subject matter having the features of claim 11. It is preferably a computer-readable data carrier on which the computer program according to the invention is stored. Thus, the computer-readable data carrier has the same advantages as the method according to the invention.

It is also preferable if the data carrier is a non-volatile memory or a non-volatile storage medium.

A further solution to the problem is provided by the subject matter having the features of claim 12. It is preferably a vehicle, in particular an autonomously operable vehicle, comprising a data processing device according to the invention and/or a computer program according to the invention and/or a computer-readable data carrier according to the invention. Thus, the vehicle has the same advantages as the method according to the invention. Furthermore, a vehicle is provided which is characterized in particular by its high functional reliability and its low accident risk.

It is also preferable if the vehicle is electric. In particular, autonomously operable means that the vehicle can be operated autonomously, or at least partially autonomously.

In principle, it is preferred if the method according to the invention for determining a switching state of a parking lock and/or the method according to the invention for operating a vehicle is a computer-implemented method.

Advantageous further developments of the present invention are described in the subclaims and in the following description of the figures.

Short description of the drawings

• 1 eine Ausführungsform eines erfindungsgemäßen Fahrzeugs, und
• 2 eine Ausführungsform eines erfindungsgemäßen Verfahrens.

The invention is explained in detail below using exemplary embodiments with reference to the drawings. In the drawings:

• 1 an embodiment of a vehicle according to the invention, and
• 2 an embodiment of a method according to the invention.

Preferred embodiment of the invention

The 1 shows a preferred embodiment of a vehicle 1 according to the invention. The vehicle 1 is an autonomously operable vehicle which includes an electric drive. The vehicle 1 further includes a parking lock 2, which includes a parking lock mechanism 2b that can be actuated by means of an electric actuator 2a of the parking lock 2. In addition, the vehicle 1 includes a preferred embodiment of a data processing device 3 according to the invention. The data processing device 3 is a control unit of the vehicle 1. The data processing device 3 further includes a preferred embodiment of a data carrier 4 according to the invention, which is designed as a non-volatile storage medium and on which a preferred embodiment of a computer program 5 according to the invention is stored. In addition, a sensor 6, which is designed as an acoustic sensor 6 or as an acceleration sensor 6, is connected to the data processing device 3 for data transmission in order to forward determined measurement data. The parking lock mechanism 2b is designed such that it can mechanically block the drive train of the vehicle 1 when it is transferred into a corresponding switching state by the actuator 2a.

The 2 shows a preferred embodiment of a method 27 according to the invention for operating a vehicle. The vehicle is the vehicle from 1 . The method 27 for operating a vehicle comprises a preferred embodiment of a method 26 according to the invention for determining a switching state of a parking lock. The parking lock is the parking lock from 1 . First, the method 26 for determining a switching state of a parking lock is started 20. In a first method step 21, measurement data is received, wherein the measurement data are acoustic data and/or acceleration data, which are determined by the sensor from 1 have been determined. A second method step 22 then takes place, which involves determining a switching state status of the parking lock based on the measured data. The switching state that is determined is a switching state that corresponds to an incomplete locking state of the parking lock and thus causes vibrations or noises that are characteristic of this switching state and can be identified using the measured data. As a third method step 23, the receiving of measured data is repeated if the said switching state has not been determined. If the said switching state, which can cause damage to the parking lock or to the drive, has been determined, a fourth method step 24 takes place, which includes the initialization of an acoustic and visual warning signal and a stopping of the vehicle by means of a braking process of the vehicle. Once the vehicle has come to a standstill, the method 26 for determining a switching state of a parking lock is terminated 25.

The examples of the 1 and 2 In particular, they are not restrictive and serve only to clarify the inventive concept.

List of reference symbols

1

vehicle

2

Parking lock

2a

Actuator

2b

Parking lock mechanism

3

device

4

Data carrier

5

computer program

6

Sensor, acoustic sensor, acceleration sensor

20

start

21

first procedural step

22

second procedural step

23

third procedural step

24

fourth procedural step

25

Finish

26

Proceedings

27

Proceedings

Claims (12)

Method (26) for determining a switching state of a parking lock (2), comprising: - receiving measurement data, wherein the measurement data is acoustic data and/or acceleration data, - determining a switching state of the parking lock (2) based on the measurement data. Procedure (26) according to Claim 1 , wherein the switching state is a switching state which corresponds to an incomplete locking state of the parking lock (2). Procedure (26) according to Claim 1 or 2 , wherein the measurement data are determined by means of an acceleration sensor (6) and/or an acoustic sensor (6). Method (26) according to one of the preceding claims, wherein the method is operated redundantly to another method, wherein the another method determines the switching state of the parking lock (2) based on another measurement data, wherein the another measurement data are position data, which are determined in particular by means of a position sensor. Method (26) according to one of the preceding claims, wherein the acoustic data are representative of sound generated by the parking lock (2) and/or are characteristic of the switching state of the parking lock (2), and/or wherein the acceleration data are representative of vibrations and/or accelerations generated by the parking lock (2) and/or are characteristic of the switching state of the parking lock (2). Procedure (26) according to Claim 4 or 5 , wherein the position data is representative of a position of the parking lock (2) which is created by the parking lock (2) and/or is characteristic of the switching state of the parking lock (2). Method (26) according to one of the preceding claims, further comprising: - generating safety data based on the determined switching state, wherein the safety data are in particular characteristic of an initialization of a stopping of a vehicle (1) and/or an initialization of a warning signal. Method (27) for operating a vehicle (1), comprising a method (26) according to Claim 7 , in particular further comprising: - stopping the vehicle (1) on the basis of the safety data. Device (3) for data processing, comprising a processor configured to carries out the method (26, 27) according to one of the preceding claims. Computer program (5) comprising instructions which, when the program (5) is executed by a computer, cause the computer to carry out the method (26, 27) according to one of the Claims 1 until 8 to execute. Computer-readable data carrier (4) on which the computer program (5) according to Claim 10 is stored. Vehicle (1), in particular autonomously operable vehicle (1), comprising at least one device (3, 4, 5) according to one of the Claims 9 until 11 .