DE102013000310A1 - Method for determining set speed of longitudinal control system for assisting driver of motor car, involves determining security setting speed in response to environment variable - Google Patents

Abstract

The method involves determining a default setting speed (9) in response to an initial operator input (11) of a driver (7). A surrounding area (13) of the motor car (1) describing the environment variable (15) is determined. A security setting speed is determined in response to the environment variable. The security setting speed is displayed to the driver of the motor car. Independent claims are included for the following: (1) a longitudinal control system; and (2) motor car.

Description

The invention relates to a method for determining a setting speed of a longitudinal control system for assisting a driver of a motor vehicle according to the preamble of claim 1, a method according to longitudinal control system of a motor vehicle and a vehicle equipped with the longitudinal control system motor vehicle.

Longitudinal control systems of motor vehicles and corresponding methods are known. They serve in particular to control and / or regulate a longitudinal speed and / or a longitudinal acceleration of the motor vehicle. In particular, adaptive longitudinal control systems are known which control and / or regulate the longitudinal acceleration and / or the longitudinal speed as a function of operator inputs of a driver of the motor vehicle, a road condition of a road used by the motor vehicle, visibility conditions, traffic rules and / or the like. Depending on these variables, corresponding control and / or regulating parameters can be adapted or adapted. As input variables, such systems can have an actual speed of the motor vehicle as well as a setting speed. Furthermore, longitudinal control systems and corresponding methods are known which additionally control and / or regulate the longitudinal speed and / or longitudinal acceleration as a function of objects surrounding the motor vehicle, in particular in front of this approaching other process sweep. For this purpose, in particular a distance to a preceding object as well as a currently given relative speed can enter into the longitudinal control system. These quantities can be determined by means of appropriate sensors, in particular distance sensors, imaging devices, speed sensors and / or the like. A corresponding adaptive longitudinal control system is from an article of Jens Ludmann, Michael Weilkes: "Driver models as an aid for the development of ACC systems" in: ATZ Automobiltechnische Zeitschrift 101 (1999) 5, page 307 . 2 , known. It is also known that the current visibility is developed sensory and that a still safe for the current visibility maximum speed is determined and the driver is informed about this. Corresponding examples give the documents DE 42 148 17 A1 such as DE 44 146 57 A1 at. From the DE 42 062 27 A1 is a speed limiting device for a vehicle is known, which makes a speed limit to a maximum speed of, for example, 50 km / h depending on a switching state of fog lights or rear fog lights. Furthermore, from the DE 102 008 041 174 A1 known that the distance / speed control is adapted to weather information, wherein the weather information includes information about snowfall, fog, rain, heavy rain and weather information is transmitted to the vehicle via radio. From the DE 199 28 915 A1 a method is known with which the visibility in the field of view of the vehicle can be determined exactly, so that the driver can be made with the help of the visibility information to a customized driving style. This method consists either of a monocular video sensor measuring the contrast of an object detected by a radar or lidar sensor and of determining the range of vision from the measurements provided by the radar or lidar sensor and the monocular video sensor. Alternatively, the distance of the at least one object and its contrast can also be measured by means of a binocular video sensor and then the range of sight can be determined from the contrast and distance measurement values. In particular, a predetermined maximum setpoint speed is controlled as a function of the determined visibility. Furthermore, in particular the driver in the vehicle is signaled that the maximum set speed predetermined by him has been reduced in adaptation to the current visibility.

The object of the invention is to provide a method for determining a setting speed of a longitudinal control system for assisting a driver of a motor vehicle, in which an actual speed of the motor vehicle in response to the setting speed to achieve a safety gain is adaptable to the environmental size, this process by the driver of the motor vehicle is perceived as little patronizing as possible.

The invention results from the features of the independent claims. Advantageous developments and refinements are the subject of the dependent claims.

The object is achieved in a method for determining a setting speed of a longitudinal control system for assisting a driver of a motor vehicle according to the preamble of claim 1 by the characterizing part of claim 1. Advantageously, the polling of the correction operation input first takes place. By means of the correction operation input, the driver can change the setting speed himself, in particular to the displayed value. Advantageously, an actual speed of the motor vehicle can thus be adapted to the environmental variable in order to achieve a safety gain. Nevertheless, the driver of the motor vehicle advantageously does not perceive this as tutelage since he can initiate the control process himself. For this purpose, the driver himself can make a decision, namely as to how he queries using his correction operation input answered. Advantageously, this gives the driver complete control over the eventual implementation of the setting speed in the actually driven actual speed of the motor vehicle. Advantageously, the determination of the safety setting speed depending on the environmental size, the display of the safety setting speed as well as the interrogation of the correction operation input can be done fully automatically. Advantageously, in spite of the fully automatic steps, the final conversion of the result by the driver himself can be initiated by means of the correction operation input. The query is in particular designed so that the driver of the motor vehicle can optionally ignore them, such ignoring causes no change in the set speed in the safety setting speed. Advantageously, there is no paternalism of the driver. Advantageously, this retains full responsibility over the actually by means of the setting speed, which enters this in the form of its default setting speed system, which actual speed is actually driven. Advantageously, the system issues the query in the sense of advice, which the driver can follow or not according to his own decision.

A preferred embodiment of the method is carried out according to claim 2. Advantageously, the default setting speed is changed to the correction setting speed only if the driver actually makes the correction operation input. Advantageously, the driver thus always retains complete control over possibly required system interventions, in particular for increasing driving safety. In particular, the correction setting speed is slower than the default setting speed. In particular, the correction setting speed is the safety setting speed. Optionally, the driver may decide for himself whether to apply the safety set speed by means of the correction operation input or, if appropriate, to deviate the correction set speed between the safety set speed and the original preset set speed.

A further preferred embodiment of the method is carried out according to claim 3. Advantageously, the driver can correct the default setting speed in the safety setting speed by a simple acknowledgment. This he can do in particular by a single simple keystroke, a voice input, and / or the like. Advantageously, the driver of the motor vehicle is minimally burdened, but still receives complete control.

A further preferred embodiment of the method is carried out according to claim 4. Advantageously, the environmental quantity can be determined as the visibility. A range of sight may be understood to mean a distance between the motor vehicle and a possible object located in the environment of the motor vehicle, beyond which it is barely perceptible to the human eye. In particular, in known obstructions such as fog, rain, snow, smoke and / or the like, the visibility can be so low that for a desired driving safety a comparatively lower speed is required, in particular a speed which is less than the default setting speed. Advantageously, in this case, the safety setting speed can be adapted to the visibility so that despite the comparatively low visibility safe driving is possible. The safety setting speed can advantageously be based on the further control and / or regulation by the longitudinal control system as described above by the interrogation and by the driver's correction operator input based thereon. Advantageously, a security gain can be achieved thereby.

A further preferred embodiment of the method is carried out according to claim 5. Advantageously, the driver is confronted with the display of the safety setting speed and possibly the query to make the correction operation input, if it is determined by means of the longitudinal control system that the lower safety setting speed is required for a safety gain. In the event that the default setting speed allows the security requirements sufficient security, so advantageously no indication of the safety setting speed and no query the correction operation input.

A further preferred embodiment of the method is carried out according to claim 6. Advantageously, the resetting of the setting speed from the value of the safety setting speed to the original value of the preset setting speed can also be effected as a function of the further correction operating input. This gives the driver complete control over resetting. The further correction operation input can be carried out analogously to the previously described correction operation input, that is, correspondingly queried and / or displayed as acknowledgeable. Alternatively or additionally, the setting speed can be reset to the value of the default setting speed automatically as soon as the visibility permits it. If necessary, this can be displayed to the driver. This can optionally be done so that the driver does not feels patronized, since he has already selected the previously valid default setting speed and can be assumed that he would choose this again anyway, as soon as visibility permits.

A further preferred embodiment of the method is carried out according to claim 7. It is also advantageous to reset the setting speed by means of a simple acknowledgment step by means of the further acknowledgment option. Advantageously, the driver is minimally burdened and receives the full control.

The object is also achieved by a method for assisting a driver of a motor vehicle. The method comprises a regulation of an actual speed of the motor vehicle as a function of a setting speed, wherein the setting speed is determined according to a previously described method. This results in the advantages described above.

The object is further achieved by a longitudinal control system of a motor vehicle according to claim 9. The longitudinal control system of the motor vehicle is set up, designed, constructed and / or equipped with software for carrying out one of the previously described methods. This results in the advantages described above.

The problem is finally solved by a motor vehicle with a longitudinal control system described above. Advantageously, a security gain can be achieved, with minimal patronization of the driver of the motor vehicle. Incidentally, the advantages described above arise.

Further advantages, features and details will become apparent from the following description in which - where appropriate, with reference to the drawings - at least one embodiment is described in detail. Described and / or illustrated features may form the subject of the invention itself or in any meaningful combination, optionally also independent of the claims, and in particular may also be the subject of one or more separate application / s. The same, similar and / or functionally identical parts are provided with the same reference numerals.

Show it:

1 a schematic side view of a longitudinal control system having a motor vehicle;

2 a schematic view of a man-machine interface with a control panel of in 1 shown motor vehicle; and

3 a flowchart of a in the 1 and 2 illustrated motor vehicle feasible method for determining a setting speed of the longitudinal control system and / or to assist the driver.

1 shows a schematic side view of himself in an environment 13 moving motor vehicle 1 , The environment 13 has in particular an object 31 on, in particular another motor vehicle behind which the motor vehicle 1 herfährt.

The car 1 has a longitudinal control system 5 depending on a setting speed 3 an actual speed 19 of the motor vehicle 1 controls and / or regulates.

For influencing, in particular controlling and / or regulating, the actual speed 19 is the longitudinal control system 5 controlling a drive source 35 and a braking device 37 of the motor vehicle 1 upstream.

For measuring the actual speed 19 is the longitudinal control system 5 a speed measuring device 39 downstream. In addition, the longitudinal control system receives 5 as an input quantity an environmental variable 15 that the environment 13 describes. To determine the environmental size 15 has the motor vehicle 1 a sensor device 41 on, the the longitudinal control system 5 upstream and to this the environmental size 15 supplies. At the environmental size 15 it may in particular be a distance of the motor vehicle 1 to the preceding object 31 act. In addition, it may be in the environmental size 15 by a relative acceleration and / or relative speed to the preceding object 31 act. In addition, by means of the sensor device 41 a current visibility 17 the environment 13 determined and the longitudinal control system 5 to provide. The visibility 17 is the distance between the motor vehicle 1 and another object, in particular the object 31 in which this is barely perceptible, especially just with a contrast resolution of a human visual system. At the environmental size 15 it may be a multi-variable size with possibly several individual sizes, in particular the previously described, act.

The sensor device 41 may in particular have partial sensors, in particular distance sensors and / or imaging sensors. In particular, the sensor device 41 have their own logic for evaluating corresponding sensor data. Alternatively or additionally, however, this can also be done by means of the longitudinal control system 5 yourself. In particular, the relative speed, the relative acceleration, the distance, the visibility 17 and / or similar quantities are determined, in particular by measuring and / or calculating, as far as the individual quantities depend on each other.

This in 1 illustrated motor vehicle 1 is from a driver 7 controlled. To the driver's control duties 7 In particular, it includes stopping a lane and controlling the actual speed 19 , As the motor vehicle 1 with the longitudinal control system 5 equipped for the driver 7 the ability to hold or control the actual speed 19 from the longitudinal control system 5 to have carried out. The driver can do this 7 of the motor vehicle 1 the longitudinal control system 5 the setting speed 3 pretend. This is done by means of an initial operator input 11 in which the driver 7 the setting speed 3 to a default setting speed 9 established. This is done in particular by means of setting and / or selecting offered speed steps, in particular mileage steps, 5-kilometer steps, 10-kilometer steps.

The car 1 has a man-machine interface 33 about which the motor vehicle 1 operable, in particular feasible.

2 shows a schematic view of a control panel of the man-machine interface 33 of the motor vehicle 1 , The following is based on the 1 and 2 advantageously changing and / or adjusting the default setting speed 9 to the environmental size 15 , in particular the visibility 17 , explained.

2 shows the control panel of the man-machine interface 33 of the motor vehicle 1 , This has in particular a head unit 43 as well as a central display 45 on.

The actual speed 19 will be on the head unit 43 the driver 7 of the motor vehicle 1 displayed.

In the event that the environmental size 15 , in particular the visibility 17 is so low that lowering the default setting speed 9 would result in a safety gain, the driver 7 of the motor vehicle 1 on the central display 45 a correction setting speed 25 displayed from the originally selected default setting speed 9 differs, and in particular, the correction-setting speed 25 less than the default setting speed 9 and in particular to the visibility 17 in the neighborhood 13 of the motor vehicle 1 customized. The correction setting speed becomes advantageous 25 not automatically the longitudinal control system 5 made available. Advantageously, a query is first presented to the driver. The query is in particular in the form of an acknowledgment option 27 made available. By means of a correction operation input 23 can the driver 7 the acknowledgment possibility 27 use. At the possibility of acknowledgment 27 it is in particular a button, in particular a button on the central display 45 is shown. This can be touch-sensitive and / or by other controls, in particular push buttons, operating wheels and / or the like, triggered. Advantageously, therefore, by simply acknowledging and / or using the Quittiermöglichkeit 27 the displayed correction set speed 25 the longitudinal control system 5 to provide. This then advantageously fits the actual speed 19 to the new correction set speed 25 at. This is advantageously not fully automatic, but only in response to the correction operation input 23 , in particular by means of the benefit of the acknowledgment option 27 , This gives the driver 7 of the motor vehicle 1 complete control of the actual speed 19 , Advantageously, the driver 7 of the motor vehicle 1 decide how and when to adjust his driving behavior to the visibility 17 would like to adapt.

In the event that the environmental size 15 , in particular the visibility 17 to the effect that again a greater actual speed without serious loss of security is possible, the driver 7 in a preferred embodiment, another Quittiermöglichkeit 29 be presented. By means of the further acknowledgment option 29 can the driver 7 the original default setting speed 9 which he uses his initial operator input 11 has chosen to reinstate. Advantageously, this can be done in the same way as in the above-described acknowledgment option 27 respectively. Advantageously, the driver also receives for the reset of the setting speed 3 to the original default setting speed 9 complete control.

3 shows a flowchart of a method for determining the set speed 3 the previously described longitudinal control system 5 to assist the driver 7 of the motor vehicle 1 ,

In a first step 47 becomes the setting speed 3 to the default setting speed 9 set. This is the initial operator input 11 the driver 7 processed, in particular queried by this. According to the default setting speed 9 becomes the actual speed 19 of the motor vehicle 1 influenced, in particular controlled and / or regulated.

In a second step 49 becomes the environmental size 15 determined. This is done in particular cyclically, ie during the entire control process for influencing the actual speed 19 , In particular, by means of in 3 not shown sensor device 41 of the motor vehicle 1 the sight 17 and the actual speed 19 determined.

By means of a third step 51 becomes the environmental size 15 , in particular the visibility 17 and the actual speed 19 , at a safety setting speed 21 further processed. The safety setting speed 21 is determined in particular on the basis of a safety criterion, in particular to the effect that an environmental dimension 15 adapted driving style, in particular speed of the motor vehicle 1 , given is. In particular, such determinations may be a condition of one of the motor vehicle 1 traveled road, in particular there prevailing coefficients of friction, a resulting stopping distance, a from the environmental size 15 resulting necessary safety distance to the object 31 and / or the like in the determination of the safety setting speed 21 received. The safety setting speed 21 is in the form of the correction set speed 25 first the driver 7 of the motor vehicle 1 displayed. In addition, at a junction 55 the correction operation input 23 the driver 7 queried. Depending on the correction operation input 23 , in particular the previously described Acknowledgment option 27 either the method branches back to the first step 47 , where the setting speed 3 unchanged at the default setting speed 9 remains. Otherwise, namely when the driver 7 by means of the correction operation input 23 for a different setting speed 3 , in particular the correction setting speed 25 decides, in particular by acknowledging, becomes a fourth step 53 carried out. The fourth step 53 accesses the safety setting speed 21 to, in particular depending on the correction operation input 23 the setting speed 3 on the correction set speed 25 is set. Alternatively or additionally, the correction setting speed 25 from the safety setting speed 21 differ, especially if the driver 7 depending on the query, a correspondingly different correction operation input 23 for changing the setting speed 3 performs. According to the alternative of the acknowledgment option shown 27 is the correction set speed by a simple acknowledgment 25 on the value of the safety setting speed 21 set.

According to the fourth step 53 Then there is a longitudinal control by means of the longitudinal control system 5 based on the correction set speed 25 , It will be the actual speed 19 on the correction set speed 25 adjusted and / or regulated, so advantageous to the environmental size 15 , in particular the visibility 17 , customized.

So it is advantageous to the environmental size 15 , in particular the visibility 17 , adjusted safety setting speed 21 , which may in particular be a barely tolerable maximum speed, first the driver 7 of the motor vehicle 1 displayed and only after the driver-side correction operation input 23 , in particular the simple use of the possibility of acknowledgment 27 , as a new setting speed 3 accepted. Preferably, the driver 7 of the motor vehicle 1 after a loss of visibility limiting circumstances, a reinstatement of the set speed 3 to the previous value of the default setting speed 9 offered. In particular, this is done by means of the further Quittiermöglichkeit 29 , in particular associated with a display of the original default 9 , as in 2 shown.

The calculation of the safety setting speed 21 takes place in particular such that the motor vehicle 1 taking into account a predetermined and / or predeterminable reaction time of the driver 7 with a predefinable and / or predetermined maximum delay within sight 17 can still be braked to a standstill.

Alternatively or additionally, the determination of the safety setting speed takes place 21 by means of characteristic curves, in particular by means of characteristic curves, the environmental size 15 and / or other parameters, in particular by means of the sensor device 41 ascertainable, take into account.

Alternatively or additionally, a display period of the correction speed setting 25 on the human-machine interface 33 , in particular the central display 45 the man-machine interface 33 be limited to a predetermined and / or predeterminable period of time. Advantageously, thereby overloading and / or perceived as disturbing the driver 7 to be prevented with information. Optionally, the taking over of the correction setting speed 25 as a new setting speed 3 only if the driver 7 the illustrated acknowledgment option 27 during the time period. Optionally, the possibility of acknowledgment 27 if this is displayed only on the central display, also be withdrawn, in particular no longer be displayed once the time has expired.

While the invention has been further illustrated and explained in detail by way of preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention to leave. It is therefore clear that a multitude of possible variations exists. It is also to be understood that exemplified embodiments are really only examples that are not to be construed in any way as limiting the scope, applicability, or configuration of the invention. Rather, the foregoing description and description of the figures enable one skilled in the art to practice the exemplary embodiments, and those skilled in the art, having the benefit of the disclosed inventive concept, can make various changes, for example, to the function or arrangement of individual elements recited in an exemplary embodiment, without Protected area, which is defined by the claims and their legal equivalents, such as further explanation in the description.

LIST OF REFERENCE NUMBERS

1

motor vehicle

3

setting speed

5

Longitudinal control system

7

driver

9

Default setting speed

11

Initial operation input

13

Surroundings

15

environment size

17

visibility

19

Is speed

21

Security setting speed

23

Correction operation input

25

Correction setting speed

27

of acknowledgment

29

further confirmation option

31

object

33

Human-machine interface

35

a drive source

37

braking device

39

Speed measuring device

41

sensor device

43

Head Unit

45

Central display

47

first step

49

second step

51

Third step

53

fourth step

55

branch

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 4214817 A1 [0002]
• DE 4414657 A1 [0002]
• DE 4206227 A1 [0002]
• DE 102008041174 A1 [0002]
• DE 19928915 A1 [0002]

Cited non-patent literature

• Jens Ludmann, Michael Weilkes: "Driver models as an aid for the development of ACC systems" in: ATZ Automobiltechnische Zeitschrift 101 (1999) 5, page 307 [0002]

Claims (10)

Method for determining a setting speed ( 3 ) of a longitudinal control system ( 5 ) to assist a driver ( 7 ) of a motor vehicle ( 1 ), comprising: - determining a default setting speed ( 9 ) depending on an initial operator input ( 11 ) of the driver ( 7 ), - determining an environment ( 13 ) of the motor vehicle ( 1 ) describing the environmental size ( 15 ), - determining a safety setting speed ( 21 ) depending on the size of the environment ( 15 ), - displaying the safety setting speed ( 21 ) the driver ( 7 ) of the motor vehicle ( 1 ), characterized by: - polling a correction operation input ( 23 ), by means of which the driver ( 1 ) the setting speed ( 3 ) can change depending on the display. Method according to the preceding claim, comprising: changing the default setting speed ( 9 ) into a correction setting speed ( 25 ) if the driver ( 7 ) the correction operation input ( 23 ). Method according to one of the preceding claims, comprising: - polling the correction operation input ( 23 ) by providing an acknowledgment option ( 27 ) for acknowledging the displayed safety setting speed ( 21 ), - changing the default setting speed ( 9 ) into the safety setting speed ( 21 ) if the driver ( 7 ) the acknowledgment option ( 27 ) acknowledged. Method according to one of the preceding claims, comprising: determining the environmental size ( 15 ) as a visibility ( 17 ) - Determining the safety setting speed ( 21 ) depending on the visibility ( 17 ). Method according to one of the preceding claims, comprising: - checking whether the safety setting speed ( 21 ) is less than the default setting speed ( 9 ), - displaying the safety setting speed ( 21 ) only if the safety setting speed ( 21 ) the default setting speed ( 9 ) falls below. Method according to one of the preceding claims, comprising: - checking whether the safety setting speed ( 21 ) is greater than the default setting speed ( 9 ), - interrogation of another correction operation input ( 23 ), if the safety setting speed ( 21 ) is greater than the default setting speed ( 9 ) and if previously the setting speed ( 3 ) depending on the correction operation input ( 23 ) from the driver ( 7 ) was changed. Method according to the preceding claim, comprising: - providing the further possibility of correction as a further possibility of acknowledgment ( 29 ), - changing the correction setting speed ( 25 ) to the default setting speed ( 9 ) if the driver ( 7 ) the further acknowledgment option ( 29 ) acknowledged. Method for supporting a driver ( 7 ) of a motor vehicle ( 1 ), comprising: - rules of an actual speed ( 19 ) of the motor vehicle ( 1 ) as a function of a settling speed ( 3 ), - determining the setting speed ( 3 ) according to a method according to any one of the preceding claims. Longitudinal control system ( 5 ) of a motor vehicle ( 1 ), designed, constructed, and / or equipped with software for carrying out a method according to one of the preceding claims 1-7 or a method according to claim 8. Motor vehicle ( 1 ) with a longitudinal control system ( 5 ) according to the preceding claim.

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