METHOD FOR DETERMINING THE ABRASION VALUE OF A TIRE

Description

[0001] The invention relates to a method for determining the abrasion value of a tire of a vehicle.

[0002] The invention relates to a method for determining the abrasion value of a vehicle tire, comprising one of the following steps: Providing a vehicle, wherein the vehicle has at least one tire; providing an evaluation device, wherein the evaluation device is designed to determine a wear value of the at least one tire as a function of a physical measurement variable of the vehicle; determining the physical measurement variable of the vehicle; determining the wear value of the at least one tire as a function of the physical measurement variable of the vehicle using the evaluation device.

[0003] The vehicle could be, for example, a car, a truck, or a two-wheeler.

[0004] The physical measurement of the vehicle could be, for example, its acceleration or speed.

[0005] Methods for determining the wear value of a vehicle tire are known in the prior art. It is also known in the prior art that a physical measurement of the vehicle is determined, and then, depending on this physical measurement, the wear value of at least one tire can be determined using an evaluation device. In particular, it is known in the prior art that the physical measurement of the vehicle is, for example, the vehicle's acceleration. WO2022 / 026541 discloses a method for eliminating the need for manual reset of a tire wear system in a tire management system.

[0006] In the prior art methods for determining the wear value of a vehicle tire, circumstances during and after vehicle operation might be disregarded when determining the wear value, and these circumstances could influence the tire's wear. Therefore, a wear value of at least one tire determined according to the prior art methods might not correspond to the actual wear value of the tire.

[0007] In particular, if vehicle accelerations are determined and a wear value for at least one of the vehicle's tires is subsequently calculated based on these accelerations, driving maneuvers in which the vehicle transitions from a starting stationary state to a moving state, and / or driving maneuvers in which the vehicle transitions from a moving state to a final stationary state, could be disregarded. Such driving maneuvers could result in wear of at least one of the vehicle's tires. Since this wear could be disregarded, a wear value for at least one tire determined according to the prior art would not correspond to the actual wear value of the at least one tire. The actual wear value represents the actual mechanical or physical wear of the at least one tire.According to the current state of the art, for example, a correction or modification of a wear value determined based on vehicle accelerations could be achieved by calculating an additional wear value based on the vehicle's steering angle at sufficiently low speeds. The problem here is that not all steering angle maneuvers might be recorded; a certain number of driving maneuvers that could lead to wear on at least one tire might be overlooked.

[0008] The invention is therefore based on the objective of providing a method for determining the abrasion value of a tire, wherein the abrasion value of a tire can be determined using the method according to the invention, which corresponds to a higher degree with an actual abrasion value of a tire than abrasion values ​​that could be determined according to methods known from the prior art for determining an abrasion value.

[0009] The problem posed by the invention is solved by the fact that the method comprises the following further steps: Determining a completed driving process of the vehicle, wherein a completed driving process is a driving process of the vehicle from a starting non-movement state of the vehicle to a driving process of the vehicle into a final non-movement state of the vehicle, wherein a further wear value of the at least one tire is assigned to the completed driving process; Determining a new wear value by means of the evaluation device as a function of the wear value and the further wear value.

[0010] The completed driving process can also be referred to as a driving cycle or single trip.

[0011] Due to the inventive circumstance whereby the method comprises the following further steps: Determining a completed driving process of the vehicle, wherein a completed driving process is a movement of the vehicle from a starting stationary state to a movement of the vehicle into a final stationary state, wherein a further wear value of the at least one tire is assigned to the completed driving process; determining a new wear value using the evaluation device as a function of the wear value and the further wear value. Driving maneuvers, and in particular vehicle movements during a driving maneuver, are taken into account when determining the wear value, which might be disregarded using methods known from the prior art for determining a tire's wear value. Thus, a new wear value for the at least one tire is determined that may correspond more closely to the actual wear value of the at least one tire than would be the case with wear values ​​determined according to methods known from the prior art.

[0012] The inventive feature, whereby a further wear value of the at least one tire is assigned to each completed driving cycle, allows, for example, the determination of a generally averaged wear value for each individual journey of the vehicle, which can then be taken into account when determining the wear value of the at least one tire. Furthermore, movements of the vehicle from a starting stationary state into a driving state and / or from a driving state into a final stationary state, which involve a steering maneuver that would not have been considered in determining the wear value of the at least one tire according to methods known from the prior art, are thus taken into account.

[0013] Thus, an improved method for determining the wear value of a vehicle tire is provided, whereby the wear value corresponds more accurately and precisely to the actual wear value of the at least one tire. Overall, therefore, an improved method for determining the wear value of at least one tire of a vehicle is provided.

[0014] When determining the new abrasion value, the abrasion value initially calculated based on the physical measurement is modified according to the subsequent abrasion value. For example, the initially determined abrasion value can be changed and thus corrected by, in particular, 0% to 100% or by more than 100%. The change in the abrasion value can be achieved by adding or subtracting an abrasion value, or by multiplying or dividing it by a factor.

[0015] Further advantageous embodiments of the present invention are the subject of the dependent claims.

[0016] According to a preferred embodiment of the present invention, a steering angle of a steering device of the vehicle is determined and the movement of the vehicle from the starting non-movement state is determined on the basis of the steering angle, whereby the completed driving process of the vehicle is determined as a function of the movement of the vehicle from the starting non-movement state.

[0017] According to a preferred embodiment of the present invention, a steering angle sequence of a steering device of the vehicle is determined and the movement of the vehicle from the starting non-movement state is determined on the basis of the steering angle sequence, whereby the completed driving process of the vehicle is determined as a function of the movement of the vehicle from the starting non-movement state.

[0018] The background is a characteristic steering angle or a characteristic steering angle sequence that can occur when driving out or starting off, for example from a parking space or a parking lot.

[0019] The steering device is, for example, a steering rod or a steering wheel of the vehicle.

[0020] According to a further preferred embodiment of the present invention, a steering angle of a steering device of the vehicle is determined and the movement of the vehicle into the end non-movement state is determined on the basis of the steering angle, wherein the completed driving process of the vehicle is determined as a function of the movement of the vehicle into the end non-movement state.

[0021] According to a further preferred embodiment of the present invention, a steering angle sequence of a steering device of the vehicle is determined and the movement of the vehicle into the end non-movement state is determined on the basis of the steering angle sequence, wherein the completed driving process of the vehicle is determined as a function of the movement of the vehicle into the end non-movement state.

[0022] The background to this is the characteristic steering angle or sequence of steering angles that can occur when parking in a parking space or parking lot.

[0023] According to a further preferred embodiment of the present invention, the initial non-movement state and / or the final non-movement state is a state of the vehicle in which the vehicle has not moved relative to the surface on which it is standing for at least three minutes. The surface on which the vehicle is standing is, for example, a roadway or a parking lot.

[0024] The inventive feature, whereby the initial non-movement state and / or the final non-movement state is a state of the vehicle in which it has not moved relative to the surface on which it is standing for at least three minutes, ensures or enables that certain traffic-related interruptions of the vehicle's movement can be disregarded when determining the further wear value or the new wear value. Such traffic-related interruptions can be caused, for example, by flashing lights or traffic signals.

[0025] According to a further preferred embodiment of the present invention, the starting non-movement state and / or the ending non-movement state is a state of the vehicle in which a drive motor of the vehicle has not been operated for at least three minutes.

[0026] According to a further preferred embodiment of the present invention, the method comprises the following additional steps: Determining a steering angle of a steering device of the vehicle and determining a driving speed of the vehicle; comparing the driving speed with a threshold speed; comparing the steering angle with a threshold steering angle, wherein, in the case where the driving speed reaches or falls below the threshold speed, and at the same time the steering angle reaches or exceeds the threshold steering angle, a specific further wear factor is assigned to the steering angle and the new wear value and / or the further wear value are changed depending on the specific further wear factor by means of the evaluation device.

[0027] In the event that the further abrasion value is changed depending on the specific further abrasion factor, the abrasion value of at least one tire, which was initially determined depending on a physical measurement, is changed.

[0028] The inventive feature, in which the method comprises the aforementioned further steps, allows for the consideration of an additional factor in the operation of the vehicle that could influence the wear of the at least one tire. Thus, the wear value is determined even more precisely and corresponds to an even greater extent to the actual wear value of the at least one tire.

[0029] The comparison of the driving speed with a threshold speed is carried out in particular by means of the evaluation device.

[0030] The steering angle is compared with a threshold steering angle, in particular by means of the evaluation device.

[0031] The assignment of a specific additional abrasion factor to the steering angle is also carried out in particular by means of the evaluation device.

[0032] According to a further preferred embodiment of the present invention, spatial position data of the vehicle are provided, wherein a spatial area in which the vehicle is located can be determined based on the spatial position data of the vehicle, and a topographic abrasion factor is assigned to this spatial area. The new abrasion value or further abrasion values ​​are then changed by the evaluation device depending on the topographic abrasion factor. The spatial position data of the vehicle is, in particular, GPS data of the vehicle. The spatial position data is transmitted to and / or received by the evaluation device. If the further abrasion value is changed depending on the topographic abrasion factor, the abrasion value of at least one tire, which is initially determined as a function of a physical measurement, is changed.

[0033] The inventive feature, whereby spatial position data of the vehicle is provided, and a spatial area in which the vehicle is located can be determined based on this spatial position data, and a topographic abrasion factor is assigned to this spatial area, and the new abrasion value or further abrasion values ​​are changed depending on the topographic abrasion factor by means of the evaluation device, allows, for example, a weighting of an average correction factor of the abrasion value of the at least one tire using geodata or topographic data about the topography of the area in which the vehicle is moving. For example, greater abrasion might occur in an urban environment than in a rural region. Thus, an abrasion value can be provided that corresponds even more closely to the actual abrasion value of the at least one tire.

[0034] Further advantages, features and details, to which the scope of the invention is not limited, will now be described in more detail with reference to the drawing.

[0035] It shows: Fig. 1 : A schematic representation of a vehicle.

[0036] In the Figure 1 A vehicle 1 is shown schematically. The vehicle 1 has at least one tire 2. Furthermore, according to the diagram in the Figure 1In the illustrated exemplary embodiment of a vehicle, an evaluation device 3 is arranged on or in the vehicle. The evaluation device 3 is designed to determine the wear value of the at least one tire 2 as a function of a physical measurement variable of the vehicle 1. The physical measurement variable of the vehicle 1 can be determined, for example, by means of a sensor device 4. The evaluation device 3 is, for example, a computer device. The sensor device 4 is, for example, an acceleration measuring device.

[0037] According to the invention, a completed driving process or driving cycle of the vehicle 1 is defined, wherein a completed driving process is a journey of the vehicle 1 from a starting non-movement state of the vehicle 1 to a journey of the vehicle 1 into a final non-movement state of the vehicle 1. A further wear value of the at least one tire 2 is assigned to the completed driving process.

[0038] According to the invention, a new abrasion value is then determined by means of the evaluation device 3 depending on the abrasion value and the further abrasion value.

[0039] Preferably, a steering angle of a steering device 5 is determined and the movement of the vehicle from the starting non-movement state or the movement of the vehicle into the final non-movement state is determined based on the steering angle of the steering device 5.

[0040] In particular, the starting non-movement state and / or the ending non-movement state is a state of vehicle 1 in which a drive motor 6 of vehicle 1 has not been operated for at least three minutes.

[0041] Furthermore, spatial position data of the vehicle 1 are provided, whereby a spatial area 7 within which the vehicle 1 is located can be determined based on the spatial position data of the vehicle 1, wherein a topographic abrasion factor is assigned to the spatial area 7, wherein the new abrasion value or the further abrasion value is changed depending on the topographic abrasion factor by means of the evaluation device 3. Reference symbol list

[0042] 1 Vehicle 2 Tires 3 Evaluation device 4 Sensor device 5 Steering device 6 Drive motor 7 Spatial area

Claims

1. Method for determining an abrasion value of a tyre (2) of a vehicle (1) comprising the following steps: - providing a vehicle (1), the vehicle (1) having at least one tyre (2); - providing an evaluation device (3), the evaluation device (3) being intended for determining an abrasion value of the at least one tyre (2) in dependence on a physical measured variable of the vehicle (1); - determining the physical measured variable of the vehicle (1); - determining the abrasion value of the at least one tyre (2) in dependence on the physical measured variable of the vehicle (1) by means of the evaluation device (3); characterized by the further steps of: - determining a completed trip of the vehicle (1), a completed trip consisting of driving of the vehicle (1) from a starting non-moving state of the vehicle (1) to driving of the vehicle (1) into a final non-moving state of the vehicle (1), the completed trip being assigned a further abrasion value of the at least one tyre (2); - determining a new abrasion value by means of the evaluation device (3) in dependence on the abrasion value and the further abrasion value, wherein a steering angle of a steering device (5) of the vehicle (1) is determined and the driving of the vehicle (1) from the starting non-moving state is determined on the basis of the steering angle, wherein the completed trip of the vehicle (1) is determined in dependence on the driving of the vehicle (1) from the starting non-moving state.

2. Method according to Claim 1, characterized in that a steering angle of a steering device (5) of the vehicle (1) is determined and the driving of the vehicle (1) into the final non-moving state is determined on the basis of the steering angle, wherein the completed trip of the vehicle (1) is determined in dependence on the driving of the vehicle (1) into the final non-moving state.

3. Method according to either of the preceding claims, characterized in that the starting non-moving state and / or the final non-moving state is such a state of the vehicle (1) in which the vehicle (1) has not moved in relation to the underlying surface on which the vehicle (1) is standing for at least three minutes.

4. Method according to one of the preceding claims, characterized in that the starting non-moving state and / or the final non-moving state is such a state of the vehicle (1) in which a drive motor (6) of the vehicle (1) has not been operated for at least three minutes.

5. Method according to one of the preceding claims, characterized by the further steps of: - determining a steering angle of a steering device (5) of the vehicle (1) and determining a driving speed of the vehicle (1); - comparing the driving speed with a threshold speed; - comparing the steering angle with a threshold steering angle, wherein, if the driving speed reaches or falls below the threshold speed and at the same time the steering angle reaches or exceeds the threshold steering angle, the steering angle is assigned a specific further abrasion factor and the new abrasion value and / or the further abrasion value are changed in dependence on the specific further abrasion factor by means of the evaluation device (3).

6. Method according to one of the preceding claims, characterized in that spatial position data of the vehicle (1) are provided, wherein a spatial region (7) within which the vehicle (1) is located can be determined on the basis of the spatial position data of the vehicle (1), wherein the spatial region (7) is assigned a topographic abrasion factor, wherein the new abrasion value or the further abrasion value is changed in dependence on the topographic abrasion factor by means of the evaluation device (3).