DE102013006172A1 - Method for operating a driver assistance system and driver assistance system - Google Patents

Abstract

An object of the application relates to a method for operating a driver assistance system (1) of a motor vehicle (2), wherein the driver assistance system (1) includes a corner assistance system (3). The method comprises the following steps. There is a determination of at least one, a possible upcoming curve passage of the motor vehicle (2) characterizing parameter. In addition, a determination is made whether a curve passage of the motor vehicle (2) is imminent, based on the at least one determined parameter. If it is determined that a curve passage of the motor vehicle (2) is imminent, a determination is made as to whether an area (5) at least partially containing the determined curve (4) of a roadway (6) currently being driven by the motor vehicle (2) is due a current environmental condition of reduced friction coefficient of the roadway (6) is present, based on at least one radio receiving device (7) received data. If it is determined that in the region (5) of the roadway (6) which at least partially contains the determined curve (4) there is a reduced friction coefficient of the roadway (6) due to an instantaneous ambient condition, then at least one operating parameter of the curve assistance system (3) is adapted. ,

Description

The application relates to a method for operating a driver assistance system of a motor vehicle, a driver assistance system for a motor vehicle, a computer program product and a computer-readable medium.

From the DE 10 2007 038 059 A1 a method for operating a distance control system for vehicles is known in which the distance between a vehicle and a vehicle in front of the target vehicle is controlled depending on the traffic situation by accelerating or retarding system interventions. In this case, a forward-looking vehicle deceleration is initiated by overrun fuel cutoff and / or activation of an energy recovery system provided in the vehicle if an additional vehicle whose speed is lower than that of the target vehicle and / or that delays its travel is detected without undelayed travel of the target vehicle in front of the target vehicle.

Object of an embodiment of the invention is to provide a method for operating a driver assistance system of a motor vehicle, a driver assistance system for a motor vehicle, a computer program product and a computer-readable medium, which allow a further improved consideration of a respective current environmental situation for the operation of the driver assistance system.

A method for operating a driver assistance system of a motor vehicle, wherein the driver assistance system includes a cornering assistance system, according to one aspect of the invention comprises the following steps. There is a determination of at least one, a possible upcoming curve passage of the motor vehicle characterizing parameter. In addition, a determination is made whether a curve passage of the motor vehicle is imminent, based on the at least one determined parameter. If it is determined that a curve passage of the motor vehicle is imminent, a determination is made as to whether there is a reduced friction coefficient of the roadway in a roadway currently being traveled by the motor vehicle based on at least one radio reception device in a roadway currently being traveled by the motor vehicle received data. If it is determined that there is a reduced friction coefficient of the roadway in the region of the roadway which at least partially contains the determined curve, then at least one operating parameter of the curve assistance system is adapted.

The method according to the aforementioned embodiment enables a further improved consideration of a respective current ambient situation for the operation of the driver assistance system. This is done in particular by determining whether a curve passage of the motor vehicle is imminent and by determining whether in a, the determined curve at least partially containing portion of the currently traveled by the motor vehicle roadway is a reduced coefficient of friction of the roadway, based on the at least one radio receiving device received data and by adjusting at least one operating parameter of the corner assistance system, if it is determined that in said region of the roadway, a reduced coefficient of friction is present. As a result, a reduced due to a current environmental condition friction coefficient of the road for the operation of the corner assistance system and be adapted to such an environmental condition. The determination as to whether there is a currently reduced friction coefficient of the roadway can advantageously be carried out in the mentioned embodiment without the need for on-board sensors, on the basis of the data received from the at least one radio receiving device. It is based on the consideration that such data are provided for example by broadcasters and already have a high degree of accuracy, which also can be further improved by the evaluation of, for example, mobile data in conjunction with position information. Thus, such data received by the radio receiving device provides information which can present the current environmental conditions as accurately as possible and is therefore of particular importance for the operation of the driver assistance system.

The cornering assistance system is embodied in one embodiment as a curve adaptive proximity control system, which is also referred to as Adaptive Cruise Control Adaptive Cruise Control (ACC) and which is adapted to adjust a set target speed for operation of the proximity control system in response to the radius of curvature of the vehicle currently being traveled by the vehicle Roadway is formed in the area of lying in front of the motor vehicle environment. The adaptation of the at least one operating parameter in the mentioned embodiment includes reducing a maximum value for a curve passing speed of the motor vehicle set automatically by means of the curve-adaptive distance control system. This advantageously makes it possible to increase traffic safety by setting the maximum value, ie the maximum possible value or the upper limit of the automatically set Curve passage speed can be adapted to the currently reduced friction coefficient of the road in the region of the determined curve.

The cornering assistance system can additionally or alternatively be designed as a brake assistance system, in particular as an emergency braking system, wherein the brake assistance system is designed to automatically actuate at least one first element of the motor vehicle selected from the group consisting of a braking device, a drive device and a first warning device. The adaptation of the at least one operating parameter includes adjusting a threshold value for the automatic actuation of the at least one first element of the motor vehicle.

The adaptation of the threshold value takes place in one embodiment such that the automatic actuation of the at least one first element of the motor vehicle takes place at an earlier time in comparison to a currently set threshold value. This in turn allows an increase in traffic safety by an autonomous intervention in the driving dynamics of the motor vehicle by means of the brake assist system and / or an issue of a warning message by means of the brake assist system due to the currently reduced coefficient of friction of the road can take place earlier.

In another embodiment, the cornering assistance system is configured as a cornering system, wherein the cornering system is configured to automatically actuate at least one second element of the motor vehicle selected from the group consisting of a steering device and a second warning device. The adaptation of the at least one operating parameter in the mentioned embodiment includes adjusting a threshold value for the automatic actuation of the at least one second element of the motor vehicle.

In this case, the adaptation of the threshold value again takes place in an embodiment in such a way that the automatic actuation of the at least one second element of the motor vehicle takes place at an earlier time in comparison to a currently set threshold value. Thus, an autonomous intervention in the steering operation by means of the curve holding system or issuing a warning message at an earlier time take place, whereby the traffic safety can be increased in turn in an advantageous manner.

Determining whether there is a reduced friction coefficient of the roadway due to an instantaneous ambient condition in the area of the roadway at least partially determined is effected in one embodiment based on traffic information data received from the at least one radio reception device, in particular in the form of so-called TMC data (TMC , Traffic Message Channel). Such traffic information data typically has a standardized format. As a result, the said data can be received in a simple and reliable manner and further processed.

Additionally or alternatively to the mentioned embodiments, the driver assistance system may include a lane keeping system. The method has the following steps. A determination is made as to whether there is a warning of a wrong-way driver in a driving direction of the motor vehicle in front of the motor vehicle in the direction of travel of the motor vehicle, based on data received from the at least one radio receiving device. If it is determined that in the direction of travel of the motor vehicle in front of the motor vehicle located area of the road used by the motor vehicle in the direction of travel of the motor vehicle is present in front of a wrong-way driver, it is determined whether the road adjacent to a currently traveled by the motor vehicle lane at least has a further lane in the direction of travel of the motor vehicle. If it is determined that the road adjacent to the lane currently being traveled by the motor vehicle has at least one further lane in the direction of travel of the motor vehicle, a determination is made as to whether at least one further road user is on the at least one further lane in the area of the motor vehicle. If it is determined that there is no further road user on the at least one further traffic lane in the region of the motor vehicle, an automatic lane change of the motor vehicle to the at least one further traffic lane takes place by means of the lane keeping system. The at least one further lane in the direction of travel of the motor vehicle is arranged at a valid right driving on a right in the direction of travel of the motor vehicle side of the currently traveled by the motor vehicle lane, whereas the other lane at a valid links driving on a left in the direction of travel of the motor vehicle is arranged by the motor vehicle traffic lane. Thus, the at least one further lane is located closer to an outer edge of the lane compared to the lane currently being traveled by the motor vehicle. This in turn makes it possible to improve traffic safety by having a wrong-way driver, which is also referred to as a ghost driver, based on the data received by the at least one radio reception device. can be determined in a region lying ahead of the roadway and by means of the lane keeping system, an automatic lane change of the motor vehicle on an adjacent to the currently driven by the motor vehicle lane arranged further lane in the direction of travel of the motor vehicle.

Furthermore, the driver assistance system can additionally or alternatively to the mentioned embodiments have a pedestrian warning system, wherein the pedestrian warning system is designed to detect pedestrians in the area of a current environment of the motor vehicle based on data determined by at least one sensor of the motor vehicle. The method has the following steps. A determination is made as to whether there is a warning of persons on the road in a region of the road traveled by the motor vehicle in a direction of travel of the motor vehicle, based on data received from the at least one radio receiving device. If it is determined that in the direction of travel of the motor vehicle in front of the motor vehicle located area of the road used by the motor vehicle there is a warning against persons on the roadway, an automatic activation of the pedestrian warning system takes place. As a result, in turn, the traffic safety can be increased in an advantageous manner. In particular, the automatic activation of the pedestrian warning system based on the data received from the at least one radio receiving device may also be done while driving on lanes which typically are not pedestrians, for example on highways or motorways, and on which the pedestrian warning system is otherwise typically disabled.

Another aspect of the invention relates to a driver assistance system for a motor vehicle, wherein the driver assistance system includes a cornering assistance system. The driver assistance system has a first determination device, which is designed to determine at least one parameter characterizing a possible upcoming curve passage of the motor vehicle. In addition, the driver assistance system has a second determination device, designed to determine whether a curve passage of the motor vehicle is imminent, based on the at least one determined parameter. In addition, the driver assistance system has a third determination device, which is designed to determine whether a friction coefficient of the roadway, which is reduced due to a current environmental condition, is present in a region of a roadway currently being traveled by the motor vehicle, based on at least one of them Radio receiving device of received data, if it is determined that a curve passage of the motor vehicle is imminent. Furthermore, the driver assistance system has an adaptation device which is designed to adapt at least one operating parameter of the corner assistance system, if it is determined that there is a reduced friction coefficient of the roadway due to an instantaneous ambient condition in the region of the roadway which at least partially contains the determined curve.

The driver assistance system according to the aforementioned embodiment has the advantages already mentioned in connection with the corresponding method, which are not listed again at this point in order to avoid repetitions.

The cornering assistance system can in particular be designed as a curve-adaptive distance control system. The adaptation device is designed to reduce a maximum value for a curve passing speed of the motor vehicle automatically set by means of the distance control system.

Additionally or alternatively, the corner assistance system may be formed as a brake assistance system, in particular as an emergency braking system, wherein the brake assist system is adapted to automatically actuate at least a first element of the motor vehicle, selected from the group consisting of a braking device, a drive device and a first warning device. The adaptation device is designed in the mentioned embodiment for adjusting a threshold value for the automatic actuation of the at least one first element of the motor vehicle.

In another embodiment, the cornering assistance system is configured as a cornering system, wherein the cornering system is configured to automatically actuate at least one second element of the motor vehicle selected from the group consisting of a steering device and a second warning device. The adaptation device is designed to adjust a threshold value for the automatic actuation of the at least one second element of the motor vehicle.

The motor vehicle is for example a passenger car or a truck.

Another aspect of the invention relates to a computer program product which, when executed on a computing unit of a driver assistance system of a motor vehicle, wherein the Driver assistance system includes a corner assistance system that instructs computing unit to perform the following steps. The arithmetic unit is instructed to determine at least one parameter characterizing a possible upcoming curve passage of the motor vehicle. In addition, the arithmetic unit is instructed to determine whether a curve passage of the motor vehicle is imminent, based on the at least one determined parameter. If it is determined that a curve passage of the motor vehicle is imminent, the arithmetic unit is instructed to determine whether there is a reduced coefficient of friction of the roadway due to a momentary environmental condition in an area of a roadway currently being traveled by the motor vehicle based on the determined curve, based on at least one radio receiving device of received data. If it is determined that there is a reduced friction coefficient of the roadway in the region of the roadway which at least partially contains the determined curve, the arithmetic unit is instructed to adapt at least one operating parameter of the curve assistance system.

In addition, another aspect of the invention relates to a computer-readable medium having stored thereon a computer program product according to the aforementioned embodiment.

The computer program product and the computer-readable medium according to the aforementioned embodiments have the advantages already mentioned in connection with the corresponding methods, which are not listed again at this point in order to avoid repetitions.

Furthermore, a further aspect of the invention relates to a device for operating a driver assistance system of a motor vehicle, wherein the driver assistance system includes a cornering assistance system. The device has means for determining at least one parameter characterizing a possible upcoming curve passage of the motor vehicle. In addition, the device has means for determining whether a curve passage of the motor vehicle is imminent, based on the at least one determined parameter. Furthermore, the device has means for determining whether a friction coefficient of the road surface reduced due to an instantaneous ambient condition exists in an area of a roadway currently traveled by the motor vehicle at least partially, based on data received from at least one radio receiving device, if determined in that a curve passage of the motor vehicle is imminent. In addition, the device has means for adapting at least one operating parameter of the corner assistance system if it is determined that in the region of the roadway containing the determined curve at least a reduced friction coefficient of the roadway due to a current environmental condition.

By means of the mentioned device for operating a driver assistance system of a motor vehicle, as already explained, a further improved consideration of a respective instantaneous ambient situation for the operation of the driver assistance system is made possible.

The corner assistance system is formed in one embodiment as a curve-adaptive proximity control system, which is adapted to adjust a set target speed for the operation of the distance control system as a function of the radius of curvature of the currently traveled by the motor vehicle road in the area lying in front of the motor vehicle environment. The means for adjusting are formed in the said embodiment for reducing a maximum value for a curve passing speed of the motor vehicle automatically set by the curve-adaptive distance control system. This advantageously makes it possible to increase traffic safety by adapting the maximum value of the automatically set curve transit speed to the currently reduced friction coefficient of the roadway in the region of the determined curve.

The cornering assistance system can additionally or alternatively be designed as a brake assistance system, in particular as an emergency braking system, wherein the brake assistance system is designed to automatically actuate at least one first element of the motor vehicle selected from the group consisting of a braking device, a drive device and a first warning device. The means for adjusting are formed in the said embodiment for adjusting a threshold value for the automatic actuation of the at least one first element of the motor vehicle.

The adaptation of the threshold value takes place in one embodiment such that the automatic actuation of the at least one first element of the motor vehicle takes place at an earlier time in comparison to a currently set threshold value. This in turn allows an increase in traffic safety by an autonomous intervention in the driving dynamics of the motor vehicle by means of the brake assist system and / or an output of a warning message by means of the brake assist system due to the current Reduced coefficients of friction of the roadway can be done earlier.

In another embodiment, the cornering assistance system is configured as a cornering system, wherein the cornering system is configured to automatically actuate at least one second element of the motor vehicle selected from the group consisting of a steering device and a second warning device. The means for adjusting are formed in the said embodiment for adjusting a threshold value for the automatic actuation of the at least one second element of the motor vehicle.

In this case, the adaptation of the threshold value again takes place in an embodiment in such a way that the automatic actuation of the at least one second element of the motor vehicle takes place at an earlier time in comparison to a currently set threshold value. Thus, an autonomous intervention in the steering operation by means of the curve holding system or issuing a warning message at an earlier time take place, whereby the traffic safety can be increased in turn in an advantageous manner.

The means for determining whether the region of the roadway which at least partially contains the determined curve has a reduced friction coefficient of the roadway in an instantaneous ambient condition are in an embodiment for determining based on traffic information data received from the at least one radio receiving device, in particular in the form of so-called TMC Data, educated. Such traffic information data typically has a standardized format. As a result, the said data can be received in a simple and reliable manner and further processed.

Embodiments of the invention will now be described with reference to the accompanying figures.

1 shows a flowchart of a method for operating a driver assistance system of a motor vehicle according to a first embodiment of the invention;

2 shows a flowchart of a method for operating a driver assistance system of a motor vehicle according to a second embodiment of the invention;

3 shows a flowchart of a method for operating a driver assistance system of a motor vehicle according to a third embodiment of the invention;

4 shows an example of a traffic situation in which the methods according to the application can be used;

5 shows an example of another traffic situation in which the methods according to the application can be used;

6 shows a driver assistance system for a motor vehicle according to an embodiment of the invention.

1 shows a flowchart of a method for operating a driver assistance system of a motor vehicle according to a first embodiment of the invention. The motor vehicle is for example a passenger car or a truck and the driver assistance system includes a cornering assistance system.

In one step 50 a determination is made of at least one, a possible upcoming curve passage of the motor vehicle characterizing parameter. For example, determining the at least one parameter includes determining a driving course of the motor vehicle and / or a course of the road traveled by the motor vehicle.

Determining the driving course or the course of the road used by the motor vehicle can be based on data determined by at least one sensor of the motor vehicle and / or by means of map data stored in a memory device based on the instantaneous position of the motor vehicle. In one embodiment, the storage device is part of a navigation system, in particular of a navigation system of the motor vehicle.

In one step 60 is based on the at least one in the step 50 determined parameter determines whether a curve passage of the motor vehicle is imminent. For example, if in the step 50 a course of the carriageway traveled by the motor vehicle has been determined, it is determined whether a radius of curvature of the carriageway in a region in front of the motor vehicle exceeds a predetermined threshold value. For this purpose, in one refinement of the method, a roadway in the map data with a stored radius of curvature of the carriageway traveled by the motor vehicle is included in the decision. Furthermore, it is possible to conclude a curve passage if a momentary lateral acceleration of the motor vehicle exceeds a predetermined threshold value.

Will in the step 60 determines that a curve passage of the motor vehicle is not imminent, the steps become 50 and 60 repeatedly executed.

If, in contrast, in the step 60 is determined that a curve passage of the motor vehicle is imminent, takes place in one step 70 determining whether a friction coefficient of the road surface reduced due to an instantaneous ambient condition is present in a region of the roadway currently being traveled by the motor vehicle, based on data received from at least one radio receiving device of the motor vehicle, in particular based on the at least one Radio receiving device received traffic information data, for example in the form of so-called TMC data, which are provided by broadcasters.

The coefficient of friction of the road can be reduced, in particular due to a current weather situation in the vicinity of the motor vehicle, for example due to rainfall, snowfall or black ice. Respective traffic information data received from the radio receiving device includes a hydroplaning alert in such situations. Furthermore, the friction coefficient may be reduced, for example due to road surface contamination, in particular due to an oil trace. Such warnings of road pollution can also be received by means of the radio receiving device in the form of corresponding traffic information messages. The location data contained in the corresponding traffic information message to the affected section are thereby compared with the current position of the motor vehicle, which is determined for example by means of a satellite-based position determining device of a navigation system of the motor vehicle, and determined from whether in the, the determined curve at least partially containing area of currently traveled by the motor vehicle roadway due to a current environmental condition reduced friction coefficient of the road is present.

The determination as to whether the region of the roadway currently being traveled by the motor vehicle has a reduced coefficient of friction of the roadway due to an instantaneous ambient condition may also be determined based on at least one mobile radio reception device and / or a vehicle-to-vehicle Communication device of the motor vehicle received data done.

Will in the step 70 determines that the friction coefficient of the roadway is not reduced in the region of the roadway which at least partially includes the determined curve, the steps 50 and 60 and optionally 70 repeatedly executed.

If, in contrast, in the step 70 is determined that in which the determined curve at least partially containing region of the roadway is due to a current environmental condition reduced friction coefficient of the roadway, takes place in one step 80 an automatic adaptation of at least one operating parameter of the curve assistance system.

The curve assistance system can be designed in particular as a curve-adaptive distance control system. The automatic adaptation of the at least one operating parameter in this case includes an automatic reduction of a maximum value for a set by means of the distance control system curve passing speed of the motor vehicle.

Furthermore, the corner assistance system can be designed as a brake assistance system, in particular as an emergency brake system. The brake assist system is designed to automatically actuate at least one first element of the motor vehicle, selected from the group consisting of a braking device, a drive device and a first warning device. The automatic adaptation of the at least one operating parameter includes adjusting a threshold value for the automatic actuation of the at least one first element of the motor vehicle. In particular, the adjustment of the threshold value can take place such that the automatic actuation of the at least one first element of the motor vehicle takes place at an earlier time in comparison to the current threshold value.

Furthermore, the corner assistance system may be formed as a cornering system, wherein the cornering system is adapted to automatically actuate at least one second element of the motor vehicle, selected from the group consisting of a steering device and a second warning device. In this case, adjusting the at least one operating parameter includes adjusting a threshold for the automatic actuation of the at least one second element of the motor vehicle. The adjustment of the threshold value can again take place in such a way that the automatic actuation of the at least one second element of the motor vehicle takes place at an earlier time in comparison to the current threshold value.

2 shows a flowchart of a method for operating a driver assistance system of a motor vehicle according to a second embodiment of the invention. In the illustrated embodiment, the driver assistance system includes a lane keeping system. The motor vehicle is, for example, again a passenger car or a truck.

Additionally or alternatively to the in 1 shown steps 50 to 80 takes place in the 2 illustrated embodiment in one step 90 receiving data by means of the at least one radio receiving device of the motor vehicle. Receiving the data again involves receiving traffic information data by means of the at least one radio receiving device of the motor vehicle.

In one step 100 is based on the of the at least one radio receiving device in the step 90 received data is determined whether there is a warning of a wrong-way driver in a in the direction of travel of the motor vehicle in front of the motor vehicle located area of the road used by the motor vehicle. The location data contained in the corresponding traffic information messages to the affected section of the route are compared with a determined instantaneous position of the motor vehicle.

Determining whether there is a warning of a wrong-way driver in the area of the road traveled by the motor vehicle in the direction of travel of the motor vehicle can also be based on at least one mobile radio receiving device and / or a vehicle-to-vehicle communication device of the motor vehicle received Data is done.

If in the step 100 it is determined that there is no warning of a wrong-way driver in the area of the roadway in front of the motor vehicle in the direction of travel of the motor vehicle, the steps become 90 and 100 repeatedly executed.

If, in contrast, in the step 100 it is determined that there is a warning of a wrong-way driver in the area of the road ahead of the motor vehicle in the direction of travel of the motor vehicle, in one step 110 determining whether the road adjacent to a lane currently being traveled by the motor vehicle has at least one further lane in the direction of travel of the motor vehicle. This can be done based on data determined by at least one sensor of the motor vehicle, for example by means of an image evaluation of images taken by at least one optical camera of the motor vehicle. Furthermore, based on map data stored in a memory device, in particular of a navigation system of the motor vehicle, it can be determined whether the roadway has several lanes in the direction of travel of the motor vehicle.

If it is determined that the road adjacent to the lane currently being traveled by the motor vehicle has no further lane in the direction of travel of the motor vehicle, in the embodiment shown, in one step 130 an automatic output of a warning message before the wrong-way driver by means of a warning device of the motor vehicle. For example, in the step 130 issuing an acoustic warning message and / or an optical warning message, by means of which the occupants of the motor vehicle, in particular the driver of the motor vehicle, can be warned of the determined wrong-way driver.

If, in contrast, in the step 110 determining that the roadway adjacent to the lane currently being traveled by the motor vehicle has at least one further traffic lane in the direction of travel of the motor vehicle, in the embodiment shown takes place in one step 120 determining whether at least one further road user is located on the at least one further lane in the area of the motor vehicle. This can in turn be based on data determined by the at least one sensor of the motor vehicle. Furthermore, this can be done based on data received from a vehicle-to-vehicle communication device of the motor vehicle which contain position data from other road users in the area of the current environment of the motor vehicle.

Will in the step 120 determines that there is at least one other road users on the other lane in the area of the motor vehicle, issuing a warning message by means of the warning device of the motor vehicle, as in turn with the step 130 is shown.

If, in contrast, in the step 120 is determined that there is no other road users on the at least one further lane in the area of the motor vehicle, takes place in the embodiment shown in one step 140 an automatic execution of a lane change of the motor vehicle on the at least one further lane by means of the lane keeping system.

3 shows a flowchart of a method for operating a driver assistance system of a motor vehicle according to a third embodiment of the invention. The driver assistance system has in the embodiment shown a pedestrian warning system, wherein the Pedestrian warning system for detecting pedestrians in the area of a current environment of the motor vehicle based on at least one sensor of the motor vehicle determined data, in particular based on at least one optical camera of the motor vehicle and / or at least one radar transmitter of the motor vehicle determined data is formed. The motor vehicle is for example a passenger car or a truck.

In one step 150 takes place in the embodiment shown additionally or alternatively to the in the 1 and 2 shown steps 50 to 140 receiving data by means of the at least one radio receiving device of the motor vehicle. In particular, traffic information data can in turn be received by means of the at least one radio receiving device of the motor vehicle.

In one step 160 is based on the in the step 150 Data received from the at least one radio receiving device determines whether there is a warning of people on the roadway in a region of the roadway traveled by the motor vehicle in the direction of travel of the motor vehicle. The location data contained in the corresponding traffic information messages to the affected section of the route are compared with a determined instantaneous position of the motor vehicle.

The determination as to whether there is a warning of persons on the road in the area of the road traveled by the motor vehicle in the direction of travel of the motor vehicle can also be based on at least one mobile radio reception device and / or a vehicle-to-vehicle communication device the motor vehicle received data.

Will in the step 160 determines that in the direction of travel of the motor vehicle in front of the motor vehicle area of the roadway there is no warning of persons on the roadway, the steps become 150 and 160 repeatedly executed.

If, in contrast, in the step 160 is determined that in the direction of travel of the motor vehicle in front of the motor vehicle located area of the road used by the motor vehicle is a warning of persons on the roadway, takes place in one step 170 an automatic activation of the pedestrian warning system. In particular, in the step 170 a recognition algorithm for pedestrians, for example, be unlocked on motorways, in particular, if a TMC message is made for a section of the motorway, which warns of people on the road.

By means of the embodiments shown, driver assistance systems can thus be adapted to changed road and traffic conditions, as already explained, in particular with the aid of TMC messages. It is assumed that the quality of such TMC messages, for example, by evaluations of smartphones with GPS information can be further improved and the data can thus be used in a reliable manner for the operation of driver assistance systems. This can be done automatically by means of the embodiments shown. Thus, on the basis in particular of TMC messages, driver assistance systems can be automatically reconfigured and thus adapted to changed road conditions, for example.

In the in 1 In this case, for example, the maximum passage speed in a curve-adaptive ACC system is reduced and / or the control parameters of an emergency brake system are adjusted, in order to warn and brake earlier, if necessary.

In the in 2 shown embodiment, in particular in a ghost driver warning, for example, automatically activates a warning on oncoming traffic and automatically activates a lane change to an example right track when a lane keeping system exists. The left lane is then considered blocked.

In the in 3 In particular, detection algorithms for pedestrians can be unlocked on motorways, a TMC message should be made for a motorway section, for example a warning "Attention, people on the road".

In another, not shown in the figures embodiment is indicated via TMC message that a jam end is expected soon. Then a set by means of an ACC system speed of the motor vehicle or the set speed of a speed limiter is automatically adjusted to a safe level, the driver can possibly increase this again.

4 shows an example of a traffic situation in which the methods according to the embodiments of the invention, in particular the methods according to the in 1 shown embodiment, can be used.

In the traffic situation shown drives a motor vehicle 2 in the form of a passenger car in a direction of travel shown schematically by an arrow A on a first lane 22 a roadway 6 , Next to the first lane 22 indicates the roadway 6 also another lane 21 on.

In the direction of travel of the motor vehicle 2 is located in front of this another motor vehicle 20 in the form of a passenger car on the first lane 22 , The further motor vehicle 20 moves in a direction schematically represented by an arrow B direction. The further motor vehicle 20 forms in the situation shown a target vehicle of an in 4 not shown curve adaptive distance control system of the motor vehicle 2 , For this purpose, the motor vehicle 2 at least a first sensor 23 auf, which is for detecting objects in the range of a current environment of the motor vehicle 2 within a schematically represented detection area 24 is trained. The at least one first sensor 23 is designed for example as a radar sensor. The further motor vehicle 20 is in the situation shown at least partially within the detection range 24 , whereby based on the at least one first sensor 23 determined data a distance of the other motor vehicle 20 to the motor vehicle 2 and a speed of the further motor vehicle 20 relative to the motor vehicle 2 can be determined.

In the traffic situation shown is a passage of a curve 4 the roadway 6 by the motor vehicle 2 imminent. As related to 6 in the situation shown may be based on a radio receiving device 7 of the motor vehicle 2 received data, whether in one, the curve 4 at least partially inclusive area 5 the moment of the motor vehicle 2 busy carriageway 6 a due to a current environmental condition reduced friction coefficient of the road 6 is present and, if this is determined, an automatic adaptation of at least one operating parameter of the curve-adaptive distance control system of the motor vehicle 2 respectively. In particular, an automatic reduction of a maximum value for a set by means of the distance control system curve passage speed of the motor vehicle 2 respectively.

5 shows a further example of a traffic situation in which the methods according to the embodiments of the invention, in particular the methods according to the in the 2 and 3 shown embodiments, can be used. Components with the same functions as in 4 are denoted by the same reference numerals and will not be explained again below.

In the in 5 the traffic situation shown drives the motor vehicle 2 in a direction schematically represented by an arrow A direction of travel on a first lane 11 a roadway 6 , The roadway 6 points next to the first lane 11 another lane 12 in the direction of travel of the motor vehicle 2 on. For example, the roadway forms 6 a part of a highway or a motor road.

On the first lane 11 the roadway 6 is located in a direction of travel of the motor vehicle 2 in front of the motor vehicle 2 located area 9 the roadway 6 a wrong-way driver 10 in the form of another motor vehicle 25 , which is in a direction schematically represented by an arrow C direction opposite to the direction of travel of the motor vehicle 2 emotional.

As will be further explained in connection with the following figure, based on the radio receiving apparatus 7 of the motor vehicle 2 received data are determined that the wrong-hand driver 10 in the direction of travel of the motor vehicle 2 in front of this on the road 6 located. In this case, in the situation shown, based on at least one second sensor 26 of the motor vehicle 2 determined data determined that the roadway 6 adjacent to the momentarily of the motor vehicle 2 busy lane 11 the further lane 12 in the direction of travel of the motor vehicle 2 having. The at least one second sensor 26 has, for example, an optical camera and is for detecting objects within a schematically represented detection area 27 educated. In addition, based on in an in 5 Not shown storage device of a navigation system of the motor vehicle 2 filed map data also be determined that the roadway 6 adjacent to the momentarily of the motor vehicle 2 busy lane 11 at least one further lane in the direction of travel of the motor vehicle 2 that is, in the situation shown, the further lane 12 ,

In the situation shown, therefore, is also based on the at least one sensor 26 determined data determines whether at least one other road users on the other lane 12 in the area of the motor vehicle 2 located. In the situation shown, it is determined that there is no other road user on the other lane 12 in the area of the motor vehicle 2 which causes an automatic lane change of the motor vehicle 2 on the other lane 12 by means of an in 5 Lane keeping system of the motor vehicle, not shown 2 can be done, as shown schematically by an arrow D.

Furthermore, in the in 5 shown situation based on the radio receiving device 7 received data are determined, whether in the area 9 that of the motor vehicle 2 busy carriageway 6 a warning on the road 6 present and, if this is determined, an automatic activation of an in 5 not shown pedestrian warning system of the motor vehicle 2 take place, as will be explained in more detail in conjunction with the following figure.

In addition shows 6 a driver assistance system 1 in the 4 and 5 shown motor vehicle 2 according to an embodiment of the invention. Components with the same functions as in the 4 and 5 are denoted by the same reference numerals and will not be explained again below.

The driver assistance system 1 has a cornering assistance system 3 which, in the embodiment shown, is designed as a curve-adaptive distance control system of the motor vehicle. The curve assistance system 3 has a first detection device 14 which is used to determine at least one, a possible upcoming curve passage of the in 6 is formed not shown motor vehicle characterizing parameter. This is the first investigative device 14 via a signal line 36 with the second sensor 26 connected in the form of at least one optical camera. Furthermore, the first detection device 14 via a signal line 37 with a navigation system 33 connected to the motor vehicle. This can be a profile of the road used by the motor vehicle or a driving course of the motor vehicle based on the second sensor 26 determined data and / or based on in a storage device 35 of the navigation system 33 stored in the latter case, the current position of the motor vehicle by means of a satellite-based position detecting device 34 of the navigation system 33 is determined.

In addition, the corner assistance system has 3 a second detection device 15 on, which is designed to determine whether a curve passage of the motor vehicle 2 imminent, based on the at least one parameter determined. This is the second investigation device 15 via a signal line 38 with the first detection device 14 connected and, for example, designed to determine whether a radius of curvature of the road in an area in front of the motor vehicle exceeds a predetermined threshold.

Furthermore, the corner assistance system 3 a third detection device 16 designed to determine whether, in an area of the roadway currently being traveled by the motor vehicle, which is at least partially determined, there is a reduced friction coefficient of the roadway based on a current ambient condition, based on the radio reception device 7 received data of the motor vehicle, if it is determined that a curve passage of the motor vehicle is imminent. This is the third investigation device 16 via a signal line 43 with the radio receiving device 7 as well as via a signal line 39 with the second detection device 15 connected.

Furthermore, the corner assistance system 3 an adapter 17 on, for adapting at least one operating parameter of the curve assistance system 3 is formed, if it is determined that in which the determined curve at least partially containing region of the roadway is present due to a current environmental condition reduced friction coefficient of the road. The fitting device 17 is in the embodiment shown via a signal line 40 with the third detection device 16 as well as via a signal line 41 with a fourth detection device 28 of the corner assistance system 3 connected to determine a set by means of the curve-adaptive proximity control system speed of the motor vehicle for maintaining a selected following distance to a target vehicle of the curve-adaptive distance control system. The fourth investigative device 28 is via a signal line 42 with the first sensor 23 connected. In the embodiment shown, the fitting device is 17 for reducing a maximum value for a curve passing speed of the motor vehicle automatically set by the distance control system, wherein the maximum value of the curve passing speed also by means of the fourth determining device 28 is determined.

The driver assistance system 1 also has a lane keeping system in the illustrated embodiment 8th on. The lane keeping system 8th has a fifth detection device 30 on, which is designed to determine the position of the motor vehicle with respect to a lane of a roadway currently being traveled by the motor vehicle. This is the fifth investigation device 30 via a signal line 46 with the second sensor 26 connected. Furthermore, the lane keeping system has 8th a sixth detection device 29 based on from the radio receiving device 7 received data is designed to determine whether there is a warning of a wrong-way driver in a in the direction of travel of the motor vehicle in front of the motor vehicle located area of the road used by the motor vehicle. This is the sixth detecting device 29 via a signal line 44 with the radio receiving device 7 connected. If from the sixth investigator 29 it is determined that there is a warning of a wrong-way driver in the region of the roadway in front of the motor vehicle in the direction of travel of the motor vehicle, the fifth determining device is 30 Moreover, it is designed to determine whether the roadway adjacent to the lane currently being traveled by the motor vehicle has at least one further lane in the direction of travel of the motor vehicle and to determine whether at least one further road user is on the at least one further lane in the area of the motor vehicle, if such Road has at least one such further lane. The sixth investigation device 29 is via a signal line 45 with the fifth detection device 30 connected. If it is determined that there is no further road user on the at least one further lane in the area of the motor vehicle, the lane keeping system is 8th for automatically executing a lane change of the motor vehicle on the at least one further lane formed. This is the lane keeping system 8th connected in a manner not shown with a steering device of the motor vehicle.

In addition, the driver assistance system points 1 in the embodiment shown, a pedestrian warning system 13 on, being the pedestrian warning system 13 for detecting pedestrians in the area of a current environment of the motor vehicle based on the second sensor 26 determined data is formed. This is indicated by the pedestrian warning system 13 a seventh investigator 32 auf, which for determining Fußläufern by means of an image analysis of, from the second sensor 26 recorded images is formed and which thereto via a signal line 49 with the second sensor 26 connected is. Furthermore, the pedestrian warning system 13 an eighth detection device 31 which is based on the radio receiving device 7 The data received by the motor vehicle is designed to determine whether there is a warning of persons on the roadway in a region of the roadway traveled by the motor vehicle in the direction of travel of the motor vehicle. The eighth investigative device 31 is via a signal line 47 with the radio receiving device 7 connected. If from the eighth detection device 31 it is determined that in the direction of travel of the motor vehicle in front of the motor vehicle located area of the road traveled by the motor vehicle is a warning of persons on the roadway is the eighth detection device 31 for automatically activating the pedestrian warning system 13 educated.

This is the eighth investigation device 31 via a signal line 48 with the seventh investigative device 32 connected.

Furthermore, the driver assistance system 1 In the embodiment shown, a computing unit 18 and a computer readable medium 19 on, being on the computer-readable medium 19 a computer program product is stored that when it is on the arithmetic unit 18 is executed, the arithmetic unit 18 to derive the steps mentioned in connection with the embodiments of the method, in particular the steps of the 1 to 3 shown embodiments, to carry out by means of the elements mentioned here. This is the arithmetic unit 18 connected in a manner not shown directly or indirectly with the corresponding elements.

Although at least one exemplary embodiment has been shown in the foregoing description, various changes and modifications may be made. The above embodiments are merely examples and are not intended to limit the scope, applicability, or configuration in any way. Rather, the foregoing description provides those skilled in the art with a scheme for practicing at least one example embodiment, which may make numerous changes in the function and arrangement of elements described in an exemplary embodiment without departing from the scope of the appended claims and their legal equivalents ,

LIST OF REFERENCE NUMBERS

1

Driver assistance system

2

motor vehicle

3

Curve assistance system

4

Curve

5

Area

6

roadway

7

Radio reception apparatus

8th

Lane Keeping System

9

Area

10

Falschfahrer

11

lane

12

lane

13

pedestrian warning system

14

detecting device

15

detecting device

16

detecting device

17

adaptation

18

computer unit

19

medium

20

motor vehicle

21

lane

22

lane

23

sensor

24

detection range

25

motor vehicle

26

sensor

27

detection range

28

detecting device

29

detecting device

30

detecting device

31

detecting device

32

detecting device

33

navigation system

34

Position-determining device

35

storage device

36

signal line

37

signal line

38

signal line

39

signal line

40

signal line

41

signal line

42

signal line

43

signal line

44

signal line

45

signal line

46

signal line

47

signal line

48

signal line

49

signal line

50

step

60

step

70

step

80

step

90

step

100

step

110

step

120

step

130

step

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step

150

step

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step

170

step

A

arrow

B

arrow

C

arrow

D

arrow

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 102007038059 A1 [0002]

Claims (15)

Method for operating a driver assistance system ( 1 ) of a motor vehicle ( 2 ), the driver assistance system ( 1 ) a corner assistance system ( 3 ) and wherein the method comprises the following steps: determining at least one, a possible upcoming curve passage of the motor vehicle ( 2 ) characterizing parameter, - determining whether a curve passage of the motor vehicle ( 2 ), based on the at least one determined parameter, - if it is determined that a curve passage of the motor vehicle ( 2 ), determine whether in one, the determined curve ( 4 ) at least partially containing area ( 5 ) a currently of the motor vehicle ( 2 ) carriageway ( 6 ) a reduced coefficient of friction of the roadway (due to a current environmental condition) 6 ), based on at least one radio receiving device ( 7 ) of received data, - if it is determined that in which the determined curve ( 4 ) at least partially containing area ( 5 ) of the roadway ( 6 ) a reduced coefficient of friction of the roadway (due to a current environmental condition) 6 ), adjusting at least one operating parameter of the curve assistance system ( 3 ). The method of claim 1, wherein the curve assist system ( 3 is configured as a curve-adaptive proximity control system, and wherein adjusting the at least one operating parameter reduces the maximum value for a curve passing speed of the motor vehicle automatically set by the distance control system ( 2 ) includes. Method according to claim 1 or claim 2, wherein the curve assist system ( 3 ) is designed as a brake assist system, wherein the brake assist system is designed to automatically actuate at least one first element of the motor vehicle ( 2 ), selected from the group consisting of a brake device, a drive device and a first warning device, and wherein adjusting the at least one operating parameter adjusting a threshold for the automatic actuation of the at least one first element of the motor vehicle ( 2 ) includes. The method of claim 3, wherein adjusting the threshold value is such that the automatic actuation of the at least one first element of the motor vehicle ( 2 ) at an earlier date. Method according to one of the preceding claims, wherein the curve assist system ( 3 ) is formed as a cam-holding system, wherein the cam-holding system is designed to automatically actuate at least one second element of the motor vehicle ( 2 ), selected from the group consisting of a steering device and a second warning device, and wherein adjusting the at least one operating parameter comprises adjusting a threshold value for the automatic actuation of the at least one second element of the motor vehicle ( 2 ) includes. The method of claim 5, wherein adjusting the threshold value is such that the automatic actuation of the at least one second element of the motor vehicle ( 2 ) at an earlier date. Method according to one of the preceding claims, wherein determining whether in which the determined curve ( 4 ) at least partially containing area ( 5 ) of the roadway ( 6 ) a reduced coefficient of friction of the roadway (due to a current environmental condition) 6 ), based on the at least one radio receiving device ( 7 ) received traffic information data takes place. Method according to one of the preceding claims, wherein the driver assistance system ( 1 ) also a lane keeping system ( 8th ) and wherein the method further comprises the following steps: - determining whether in a direction of travel of the motor vehicle ( 2 ) in front of the motor vehicle ( 2 ) ( 9 ) of the motor vehicle ( 2 ) carriageway ( 6 ) a warning to a wrong-way driver ( 10 ), based on the at least one radio receiving device ( 7 ) data, - if it is determined that in the direction of travel of the motor vehicle ( 2 ) in front of the motor vehicle ( 2 ) ( 9 ) of the motor vehicle ( 2 ) carriageway ( 6 ) a warning to a wrong-way driver ( 10 ), determining whether the carriageway ( 6 ) adjacent to a momentarily of the motor vehicle ( 2 ) traffic lane ( 11 ) at least one further lane in the direction of travel of the motor vehicle ( 2 ), if it is determined that the carriageway ( 6 ) adjacent to the momentarily of the motor vehicle ( 2 ) traffic lane ( 11 ) at least one further lane ( 12 ) in the direction of travel of the motor vehicle ( 2 ), determining whether at least one further road user on the at least one further traffic lane ( 12 ) in the area of the motor vehicle ( 2 ), if it is determined that no further road users are on the at least one further lane ( 12 ) in the area of the motor vehicle ( 2 ), automatic execution of a lane change of the motor vehicle ( 2 ) to the at least one further lane ( 12 ) by means of the lane keeping system ( 8th ). Method according to one of the preceding claims, wherein the driver assistance system ( 1 ) also a pedestrian warning system ( 13 ), the pedestrian warning system ( 13 ) is designed for determining pedestrians in the region of a current environment of the motor vehicle ( 2 ) and wherein the method further comprises the following steps: - determining whether in a direction of travel of the motor vehicle ( 2 ) in front of the motor vehicle ( 2 ) ( 9 ) of the motor vehicle ( 2 ) carriageway ( 6 ) warning on the road ( 6 ) is present, based on the at least one radio receiving device ( 7 ) data, - if it is determined that in the direction of travel of the motor vehicle ( 2 ) in front of the motor vehicle ( 2 ) ( 9 ) of the motor vehicle ( 2 ) carriageway ( 6 ) there is a warning to persons on the roadway, automatic activation of the pedestrian warning system ( 13 ). Driver assistance system for a motor vehicle ( 2 ), the driver assistance system ( 1 ) a corner assistance system ( 3 ), comprising - a first detection device ( 14 ) designed to determine at least one, a possible upcoming curve passage of the motor vehicle ( 2 ) characterizing parameter, - a second detecting device ( 15 ) designed to determine whether a curve passage of the motor vehicle ( 2 ), based on the at least one determined parameter, - a third determination device ( 16 ) for determining whether in a, the determined curve ( 4 ) at least partially containing area ( 5 ) a currently of the motor vehicle ( 2 ) carriageway ( 6 ) a reduced coefficient of friction of the roadway (due to a current environmental condition) 6 ), based on at least one radio receiving device ( 7 ) received data, if it is determined that a curve passage of the motor vehicle ( 2 ), an adaptation device ( 17 ) adapted to adapt at least one operating parameter of the curve assistance system ( 3 ), if it is determined that in which the determined curve ( 4 ) at least partially containing area ( 5 ) of the roadway ( 6 ) a reduced coefficient of friction of the roadway (due to a current environmental condition) 6 ) is present. Driver assistance system according to claim 10, wherein the corner assistance system ( 3 ) is designed as a curve-adaptive proximity control system, and wherein the adaptation device ( 17 ) is configured to reduce a maximum value for a curve passing speed of the motor vehicle automatically set by the distance control system ( 2 ). Driver assistance system according to claim 10 or claim 11, wherein the corner assistance system ( 3 ) is designed as a brake assist system, wherein the brake assist system is designed to automatically actuate at least one first element of the motor vehicle ( 2 ) selected from the group consisting of a brake device, a drive device and a first warning device, and wherein the adjustment device ( 17 ) is adapted to adjust a threshold value for the automatic actuation of the at least one first element of the motor vehicle ( 2 ). Driver assistance system according to one of claims 10 to 12, wherein the corner assistance system ( 3 ) is formed as a cam-holding system, wherein the cam-holding system is designed to automatically actuate at least one second element of the motor vehicle ( 2 ) selected from the group consisting of a steering device and a second warning device, and wherein the adaptation device ( 17 ) is adapted to adjust a threshold value for the automatic actuation of the at least one second element of the motor vehicle ( 2 ). Computer program product that, when stored on a computer unit ( 18 ) of a driver assistance system ( 1 ) of a motor vehicle ( 2 ) is executed, wherein the driver assistance system ( 1 ) a corner assistance system ( 3 ), the arithmetic unit ( 18 ) leads to the following steps: determining at least one, a possible upcoming curve passage of the motor vehicle ( 2 ) characterizing parameter, - determining whether a curve passage of the motor vehicle ( 2 ), based on the at least one determined parameter, - if it is determined that a curve passage of the motor vehicle ( 2 ), determine whether in one, the determined curve ( 4 ) at least partially containing area ( 5 ) a currently of the motor vehicle ( 2 ) carriageway ( 6 ) a reduced coefficient of friction of the roadway (due to a current environmental condition) 6 ), based on at least one radio receiving device ( 7 ) of received data, - if it is determined that in which the determined curve ( 4 ) at least partially containing area ( 5 ) of the roadway ( 6 ) a reduced coefficient of friction of the roadway (due to a current environmental condition) 6 ), adjusting at least one operating parameter of the curve assistance system ( 3 ). A computer readable medium having stored thereon a computer program product according to claim 14.

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