DE102019004111A1 - A method of determining a landing gear defect by comparing a first roadway defect with a second roadway defect and chassis analysis system - Google Patents

Abstract

The invention relates to a method for determining a chassis defect of a chassis (12) of a motor vehicle (14) by means of a chassis analysis system (10) in which a current first roadway defect (18) is detected by means of a detection device (16) of the chassis (12) of the motor vehicle (14) ) of a roadway (22) on which the motor vehicle (14) is located, and the first roadway defect (18) is transmitted to a vehicle-external first electronic computing device (20) of the chassis analysis system (10), wherein the first roadway defect (18) is compared with one of the first electronic computing device (20) provided and stored second roadway defect (26), wherein in a deviation of the first roadway defect (18) from the provided and stored second roadway defect (26) of the chassis defect is determined. Furthermore, the invention relates to a chassis analysis system (10).

Description

The invention relates to a method for determining a suspension defect of a chassis of a motor vehicle by means of a chassis analysis system according to the preamble of claim 1. Furthermore, the invention relates to a chassis analysis system.

It is known that a chassis wear, such as worn shock absorbers, a game in the steering, an obscured lane, defects on the ball joint, wishbone or stabilizer in the motor vehicle can occur over the lifetime out, which happens in particular creeping and therefore usually unnoticed by an occupant of the motor vehicle, in particular a driver of the motor vehicle, is. The changing over a longer period of driving behavior is unconsciously compensated by the inmates by tax adjustments. This can in particular mean that a defective suspension can lead to an extended braking distance, increased aquaplaning, reduced ESP effectiveness and poor cornering stability. From the prior art, for example, methods are known which can detect a road surface unevenness.

For example, the DE 10 2012 219 631 A1 a method for detecting at least one roadway unevenness. The method comprises a step of reading in a plurality of data records, wherein each data record has at least one geographical position and an information about a detected local roadway unevenness associated with this geographical position. Furthermore, the method comprises a step of recognizing the roadway unevenness when information from a plurality of data records associated with a same geographical position represents in each case a local detected roadway unevenness.

Further, the US 2018/0068495 A1 a method for detecting and identifying road surface defects. Motion and position information is received by a variety of vehicles. A profile is retrieved for a particular vehicle from a database of vehicle profiles using an identifier of the respective vehicle. One or more criteria are identified to identify a particular type of roadway defect based on the retrieved profile of the respective vehicle. Upon determining that the received motion and position data meets the identified criteria, detection of a lane defect of the respective type and location associated with the detected lane defect is reported based on the received position information.

Object of the present invention is to provide a method and a chassis analysis system, by means of which a chassis defect of the motor vehicle can be detected.

This object is achieved by a method and by a chassis analysis system according to the independent patent claims. Advantageous embodiments are specified in the subclaims.

One aspect of the invention relates to a method for determining a chassis defect of a chassis of a motor vehicle by means of a chassis analysis system in which a current first roadway defect of a roadway on which the motor vehicle is located is detected by means of a detection device of the chassis of the motor vehicle and the first roadway defect to a vehicle-external first electronic computing device of the chassis analysis system is transmitted.

It is provided that the first roadway defect is compared with a second roadway defect provided and stored by the electronic computing device, wherein if the first roadway defect deviates from the provided and stored second roadway defect, the chassis defect is determined.

This makes it possible that by timely information in particular accidents based on the chassis failure can be avoided, which may arise, for example, based on the chassis wear or malfunction.

In particular, therefore, a vehicle behavior or a vehicle pattern is detected when driving over the roadway defect, wherein information about the type of road damage can be obtained by means of the detection device, which may also include, for example, a vehicle sensor system. The possibly type-dependent model method for determining the type of road damage is created in the target new condition of the chassis. The information about the road damage or road defect and their nature are sent to the motor vehicle external electronic computing device, which may be configured in particular as a server or cloud server, which aggregates the information from a variety of vehicles, which may also be referred to as a fleet, and increases the quality of the information about the qualitative and quantitative nature of the roadway defect. Now sends the motor vehicle, in particular the individual or individual motor vehicle, from the fleet, in particular systematically, from the information aggregated on the server information about the nature of the road defect deviating information to the Motor vehicle external first electronic computing device, it can be concluded that this particular motor vehicle has a changed driving behavior. The detected changed driving behavior can be identified as chassis wear or as the chassis defect and this information can be displayed, for example, on a display device of the motor vehicle and / or forwarded to a motor vehicle manufacturer or a service provider for the motor vehicle. As a result, accidents due to the chassis failure can be prevented.

According to an advantageous embodiment, the first roadway defect and the second roadway defect are compared by means of the first electronic computing device or by means of a vehicle-internal second electronic computing device of the chassis analysis system.

Furthermore, it has proved to be advantageous if the provided and stored second roadway defect on the basis of a transmission of a plurality of other motor vehicles, which can also be referred to as a fleet, is generated.

In a further advantageous embodiment, a multiplicity of first roadway defects are detected by means of the detection device and the plurality of first roadway defects are transmitted to the first electronic computing device and the plurality of first roadway defects are compared with a plurality of second roadway defects provided and stored by the first electronic computing device; only with a plurality of deviations of the plurality of first roadway defects from the plurality of second roadway defects the chassis defect is determined.

It is also advantageous if, when determining the chassis defect, a warning message is generated and output for a warning device of the motor vehicle for warning an occupant of the motor vehicle.

A further aspect of the invention relates to a chassis analysis system for a motor vehicle, wherein the motor vehicle has a chassis and a detection device for detecting a first roadway defect, with a first external electronic computing device, wherein the chassis analysis system is designed for carrying out a method according to the preceding aspect. In particular, the method is carried out by means of the chassis analysis system.

Yet another aspect of the invention relates to a motor vehicle having a chassis analysis system according to the preceding aspect. The motor vehicle is designed in particular as a passenger car.

Advantageous embodiments of the method are to be regarded as advantageous embodiments of the chassis analysis system and the motor vehicle. The chassis analysis system and the motor vehicle for this purpose have objective features which allow implementation of the method or an advantageous embodiment thereof.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings. The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the description of the figures and / or in the figures alone can be used not only in the respectively specified combination but also in other combinations or in isolation, without the scope of To leave invention.

• 1 eine schematische Perspektivansicht einer Ausführungsform des Fahrwerkanalysesystems; und
• 2 eine weitere schematische Perspektivansicht einer weiteren Ausführungsform des Fahrwerkanalysesystems.

Showing:

• 1 a schematic perspective view of an embodiment of the chassis analysis system; and
• 2 a further schematic perspective view of another embodiment of the chassis analysis system.

In the figures, the same or functionally identical elements are provided with the same reference numerals.

1 shows a schematic perspective view of an embodiment of a chassis analysis system 10 according to a first expression. The chassis analysis system 10 is for determining a chassis failure of a chassis 12 of a motor vehicle 14 educated. The car 14 has a detection device 16 on. The detection device 16 is for detecting a first roadway defect 18 educated. Furthermore, the chassis analysis system 10 a motor vehicle external first electronic computing device 20 on. The first electronic computing device 20 is especially designed as a cloud server.

In the method of determining a chassis failure of the landing gear 12 of the motor vehicle 14 by means of the chassis analysis system 10 is by means of the detection device 16 of the landing gear 20 the first roadway defect 18 which is in particular current, a roadway 22 on which the motor vehicle 14 is detected, and the first roadway defect 18 becomes first outside the motor vehicle electronic computing device 20 transmitted, which in this case by the arrow 24 is shown.

It is envisaged that the first roadway defect 18 with one of the first electronic computing device 20 provided and stored second roadway defect 26 is compared, wherein at a deviation of the first roadway defect 18 from the provided and stored second roadway defect 26 the chassis defect is determined.

The first roadway defect is thus a roadway defect which is with the motor vehicle 14 is detected. At the second roadway defect 26 it is a roadway defect, which by means of other motor vehicles 30 is detected.

In particular, the shows 1 in that the provided and stored second roadway defect 26 based on a transmission of a plurality of the further vehicles 30 is produced. The transmission is in particular with the arrow 28 shown.

Furthermore, the shows 1 that the first roadway defect 18 and the second roadway defect 26 by means of the first electronic computing device 20 , ie in particular motor vehicle external, are compared.

In particular, it is provided that by means of the detection device 16 a variety of first roadway defects 18 is detected and the multiplicity of first roadway defects 18 to the first electronic computing device 20 and the plurality of first roadway defects 18 with a variety of the first electronic computing device 20 provided and stored plurality of second roadway defects 26 is compared and only in a variety of deviations of the plurality of first roadway defects 18 from the variety of second roadway defects 26 the chassis defect is determined.

In particular, the invention thus makes use of the fact that when driving over a roadway defect 18 . 26 from the vehicle sensor system, in other words from the detection device 16 , the type of roadway defect 18 . 26 can be determined. The type of roadway defect 18 . 26 can be determined qualitatively and quantitatively. For example, the transverse and / or longitudinal damage can be detected qualitatively and quantitatively the severity of the damage, for example a depth of the pothole as a roadway defect 18 . 26 , are recorded. A model, such as a statistical or machine-learned model, or a method, such as a velocity-correcting pattern match, recognizes and determines based on the data of the detector 16 , which can detect, for example, the wheel speed, a speed, a transverse and longitudinal acceleration or a steering wheel, the roadway defect 18 . 26 and its kind.

Such a model / method may also be vehicle type specific and will be created during development with target chassis characteristics. In individual / individual vehicles obtained information about road damage and their nature are advantageously to a server, in other words the motor vehicle external first electronic computing device 20 , sent, collected there and aggregated. This is particularly important because, for example, a particular pothole is not common to all motor vehicles 14 . 30 is passed through the same or at all. Is the quality of the on the motor vehicle external first electronic computing device 20 aggregated data well enough, this information can be sent to the motor vehicles 14 . 30 transmitted in the field, for example to warn against dangers.

Now drives a single, individual motor vehicle 14 over the roadway defect 18 . 26 , This individual model / process result on the nature of the roadway defect 18 . 26 with the information on the first electronic computing device 20 be sent and matched with appropriate warning information. In particular, a comparison can be carried out here. If there is a deviation between the individual result and the aggregated result, this can be explained by the fact that the motor vehicle 14 the roadway defect 18 . 26 not quite, for example, only on the edge of the pothole, has passed through. However, if there is a statistically significant difference in the first roadway defect 18 from the second roadway defect 26, as the aggregated results in many transits of roadway defects 18 . 26 , it can be concluded that the motor vehicle 14 a different driving behavior compared to the other motor vehicles 30 having. This is possible since the same may be type dependent model / method in all motor vehicles 14 . 30 at least one type group is used and this model / method with the vehicle behavior pattern when running over / new state of the chassis 12 was created. That is, are results of an individual motor vehicle, so in particular of the motor vehicle 14 , significantly different from that of the other motor vehicles 30 In the fleet aggregated results, the vehicle behavior no longer corresponds to the nominal state of the chassis 12 , If the deviation of the individual results is of a systematic nature, it may also be due to the nature of the Chassis wear / chassis defect can be deduced.

Once at the occupant or owner of the vehicle 14 a deviation of the vehicle behavior from the vehicle behavior during vehicle development, that is to say the new / the condition of the chassis 12 which is implicitly included in the model / method, the occupant becomes, for example, a display device 32 ( 2 ), which may also be called conventional.

In particular, the shows 1 the vehicle 14 which is about the roadway defect 18 . 26 moves. The speed-corrected pattern comparison determines bumps lying transversely to the direction of travel with several elevations as an example of the detected first roadway defect 18 by the motor vehicle 14 , This information, together with the geolocation, is sent to the first electronic computing device 20 transmitted. On the first electronic computing device 20 Be the information from the other vehicles 30 over the second lane defect detected by these 26 aggregated to this place. The evaluation may show that it is a single pothole as a second lane defect 26 , for example, with medium depth and width. There is thus a difference of the aggregated information concerning the second roadway defect 26 and the individual information regarding the first roadway defect 18 ,

According to 1 can be provided that on the first electronic computing device 20 it was recorded that in many cases the motor vehicle 14 the actual pothole as a second lane defect 26 as bumps as the first roadway defect 18 marked. From this systematic behavior, in this case a clear pattern confusion, it can be concluded that the chassis 12 of the motor vehicle 14 worn, since the unwanted reverberation example of the body after a pothole, the pattern of movement of the body in bumps in the target / new condition of the chassis 12 equivalent. It can then be provided that the motor vehicle 14 from the vehicle's first electronic computing device 20 with a corresponding warning message 34 about the chassis damage, in particular the suspension defect is informed.

2 shows in a schematic perspective view of another embodiment of the chassis analysis system 10 , According to the 2 is provided in particular that the first roadway defect 18 and the second roadway defect 26 by means of a vehicle-internal second electronic computing device 36 of the chassis analysis system 10 be compared.

Furthermore, the shows 2 in that when determining the chassis failure, a warning message 34 for a warning device of the motor vehicle 14 , which in particular the display device 32 may correspond to the warning of an occupant of the motor vehicle 14 is generated and output.

In particular, the shows 2 that the motor vehicle 14 inside the vehicle by means of the vehicle-internal second electronic computing device 36 the difference between that from the first electronic computing device 20 to the other vehicles 30 sent warning about the lane defect 18 . 26 recognizes at the just passed place and the own analysis result. By the arrow 38 is the transfer to the other motor vehicles 30 represented by the exclamation mark 40 the warning is displayed. From one on the motor vehicle 14 saved history can be seen that systematically the first lane defect 18 is detected, although from the first electronic computing device 20 the second roadway defect 26 is spent for this place. From this local data it is concluded that the landing gear 12 of the motor vehicle 14 worn out. The information may be available to the occupant of the motor vehicle 10 be transmitted.

Overall, the invention shows a check of the chassis functionality by road damage assessment.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102012219631 A1 [0003]
• US 2018/0068495 A1 [0004]

Claims (6)

Method for determining a chassis defect of a running gear (12) of a motor vehicle (14) by means of a chassis analysis system (10) in which a current first roadway defect (18) of a carriageway (18) of the chassis (12) of the motor vehicle (14) is detected by means of a detection device (16). 22), on which the motor vehicle (14) is located, is detected and the first roadway defect (18) to a motor vehicle external first electronic computing device (20) of the chassis analysis system (10) is transmitted, characterized in that the first roadway defect (18) a second roadway defect (26) provided and stored by the first electronic computing device (20) is determined, wherein a deviation of the first roadway defect (18) from the provided and stored second roadway defect (26) determines the chassis defect. Method according to Claim 1 , characterized in that the first roadway defect (18) and the second roadway defect (26) are compared by means of the first electronic computing device (20) or by means of a second internal electronic computing device (36) of the chassis analysis system (10). Method according to one of Claims 1 or 2 characterized in that the provided and stored second roadway defect (26) is generated based on a transmission from a plurality of other motor vehicles (30). Method according to one of the preceding claims, characterized in that by means of the detection device (16) a plurality of first road defects (18) is detected and the plurality of first road defects (18) is transmitted to the first electronic computing device (20) and the plurality of first roadway defects (18) is compared with a plurality of second roadway defects (26) provided and stored by the first electronic computing device (20) and only after a plurality of deviations of the plurality of first roadway defects (18) from the plurality of second roadway defects (26) the suspension defect is determined. Method according to one of the preceding claims, characterized in that when determining the chassis defect, a warning message (34) for a warning device (32) of the motor vehicle train (14) for warning an occupant of the motor vehicle (14) is generated and output. Chassis analysis system (10) for a motor vehicle (14), wherein the motor vehicle (14) comprises a chassis (12) and a detection device (16) for detecting a first roadway defect (18) with a first external electronic computing device (20) external of the vehicle Chassis analysis system (10) for carrying out a method according to one of Claims 1 to 5 is trained.

Images