WO2018050667A1

WO2018050667A1 - Seat belt device and method for controlling a seat belt device for a motor vehicle having at least one autonomous driving function

Info

Publication number: WO2018050667A1
Application number: PCT/EP2017/072969
Authority: WO
Inventors: Günter CLUTE; Katarina Bohman; Sofia JORLOV
Original assignee: Autoliv Development Ab
Priority date: 2016-09-15
Filing date: 2017-09-13
Publication date: 2018-03-22
Also published as: DE102016217689A1

Abstract

The present invention relates to a seat belt device (1) for a motor vehicle having at least one autonomous driving function, said device comprising at least one first belt webbing portion (2) and one second belt webbing portion (3), wherein at least one of the autonomous driving functions can be activated and/or deactivated in response to at least one of the belt webbing portions (2, 3) being fastened, or wherein at least one of the two belt webbing portions (2, 3) can be released in response to one of the autonomous driving functions being activated or deactivated, or wherein at least one signaling device (4) is provided which can be activated to emit a signal prompting passengers to fasten or unfasten a belt webbing portion (2, 3) when at least one of the autonomous driving functions is activated or deactivated, or when a signal is transmitted from an external traffic guidance device (17), traffic monitoring device or road monitoring device, or when a predefined driving condition exists.

Description

Seat belt device and method for controlling a seat belt device for a vehicle with at least one autonomous driving function

The present invention relates to a safety belt device having the features of the preamble of claim 1 and a method for controlling a safety belt device for an at least partially autonomously driving vehicle having the features of the preamble of claim 6.

Retaining devices in vehicles generally comprise airbags in various arrangements and geometries which, when activated, cover various areas of the interior structure of the vehicle and thereby at least reduce the likelihood of serious injury to the occupant upon impact of the interior structure. Furthermore, the restraint devices comprise additional safety belt devices with different strap belt sections which are in contact with the occupant with associated belt retractors fastened to the vehicle with a blocking mechanism on which the belt straps can be wound up and belt buckles fastened to the vehicle. The straps can be wound with one end on the belt retractors and fixed to the vehicle with their free ends via an end fitting. The safety belt devices serve to limit the movements of the occupant, and in particular to limit and control the forward displacement, for which purpose the belt retractors, belt locks or end fittings may have additional force limiting devices and / or irreversible or reversible belt tensioning devices. In practice, safety belt devices having a strap on which a belt tongue is guided, which can be locked in a belt buckle fastened to the vehicle and which divides the belt into a diagonal belt section and a lap belt section into a three-point belt in the locked position, have proven advantageous in practice ,

Further, there is an effort to relieve the driver of increasing ride comfort while driving from various tasks. For this purpose, in addition to various sensors and control devices, additional actuators for controlling de steering, the brakes and the fuel supply may be provided, so that the vehicle can perform certain functions, such as steering, braking or accelerating autonomously. Such vehicles with such automated driving systems are referred to as semi-autonomous or fully autonomous vehicles depending on the scope of the functions assumed. Due to the functions inherited from the vehicle, the driver may either turn to another exercise or rest while driving. In any case, the driver does not have to devote his attention to driving in the same way as he used to do when driving the vehicle himself. A disadvantage of this is that the driver can only properly exploit the gain in comfort if he is not limited in its freedom of movement excesses by the applied webbing of the seat belt device. For this reason, the seat belt device should be as loose as possible with the webbing, ie with the lowest possible retraction force and in the smallest possible extent to rest on the occupant. At the same time, however, the occupant should be held back as optimally as possible in a possible accident. Because the inmate is in a possible accident or in a preliminary phase of a possible accident due to lack of attention or other employment may also be in a position or orientation that is so detrimental to restraint with the seat belt, the improved comfort and optimal restraint present here is a trade-off which is not optimally solved with a conventional seat belt device. In addition, it must be expected that the occupant is not prepared for the dangerous situation due to his reduced attention to driving and the environment, and accordingly does not perform any actions such as setting up what he would otherwise do in a non-autonomous driving.

Overall, the restraint of occupants in semi-autonomous or fully autonomous driving vehicles is a special task, since the comfort gained by the autonomous driving comfort should not be unnecessarily restricted, and the occupant should still be held back safely in all possible driving situations.

The object of the invention is therefore to provide a Sicherheitsgurtein ^¬ direction for a vehicle with at least one autonomous driving function and a method for controlling the same, which allow safe restraint of the occupant in Un ^¬ case with a simultaneously good comfort during autonomous driving.

To solve the problem, a seat belt device with the features of claim 1 and a method with the features of claim 6 is proposed. Further preferred developments of the invention can be found in the subclaims, the description and the associated figures. According to the basic idea of the invention it is proposed that at least one of the autonomous driving functions in response to the application of at least one is the webbing portions acti ^¬ vierbar and / or deactivated, or that at least one of the two webbing portions depending on the Aktvierung and / or deactivation of one of the autonomous driving functions is solvable, or that at least one signaling device is provided which can be actuated to deliver a signal to the occupant to deposit or create a Gurtbandabschnittes signal when at least one of the autonomous driving functions is activated or deactivated or if a signal ei ^¬ ner external traffic control device, Verkehrsüberwachungsein ^¬ direction or road monitoring device is transmitted or when a predefined driving condition exists.

Basically, by investing or conscious

Not applying the Gurtbandabschnitte various retention characteristics and comfort properties of the Sicherheitsgurtein ^¬ direction can be realized. So basically assume ^¬ sure that the driver reduces its related driving attention upon activation of an autonomous driving function. For this reason, the driver can only activate the autonomous driving ^¬ function or the autonomous driving function can only be activated when the occupant has previously created another Gurtbandabschnitt and thereby improved retained. The proposed solution, the seat belt device can be adapted to the autonomous driving situations with regard to their Rückhaltefunkti ^¬ on, or the activation of the autonomous driving function can be combined with an adaptation of the seat belt device. In the reverse case, the seat belt device can also be adapted to deactivate the autonomous driving function by one of the two Gurtbandabschnitte when deactivating tion of the function is solved. In this case, a Signaleinrich ^¬ tion may be provided, which prompts the occupant to create and / or drop the webbing section. The webbing sections are therefore not automatically released or locked, but it is the occupant only indicated that he can solve the webbing sections or create, if the autonomous driving function is activated or deactivated or should be. Alternatively, the signal for releasing or ^applying the webbing sections can also be triggered by a signal from an external traffic control device, traffic monitoring device or road monitoring device, if this signal permits, for example, a conclusion on changed driving conditions. Furthermore, the signal of the signaling device can also be triggered when a predefined driving state is detected, such as the undershooting or exceeding of predetermined vehicle speeds. In this case, for example when exceeding the predetermined vehicle speed, a request can be displayed to create an additional belt ^¬ band section, whereby the retention of the occupant and the associated safety can be improved. In the opposite case, when the vehicle speed falls below a predetermined level, information can be displayed that a belt webbing section can be stored again to increase comfort.

The first webbing section may preferably be formed by a 3-point belt with a diagonal belt section crossing the occupant's chest and a lap belt section crossing the pelvis of the occupant. 3-point harnesses have proven themselves in practice and can thus be applied on the basis of their assumed prominence without further reflection after proven practice. They also offer proven safety during normal driving. The Diagonalgurtabschnitt can then preferably in response to the activation of an autonomous driving function and / or depending on the presence of a pre-defined driving situations ^¬ article, such as dissolved falling below a predetermined vehicle speed, whereby the occupant upper body thus collected ^¬ in the sense of an improved comfort can move more freely. The first webbing section in the form of the 3-point webbing comprises in this case two mutually un ^¬ dependent applicable subsections, namely the Diagonalgurtabschnitt and the lap belt section. In this case, the diagonal belt section and the lap belt section can be connected to a belt tongue via connections detachable from one another. The solubility can be realized by the connection is actively brought by an actuator in a releasable position, so that the Diagonalgurtabschnitt ^¬ closing can be solved manually.

It is further proposed that the second webbing section is formed by a 2-point belt crossing the diagonal belt section of the 3-point webbing. The 2-point harness virtually restrains the occupant in a cross-over over both shoulders, so that the likelihood of the occupant's torsion can be at least reduced, regardless of his sitting position. The restraint forces in the webbing sections can be reduced for improved comfort, since the occupant is retained already improved on the cross geometry of the seat belt device, so that the safety of the occupant is not reduced altogether ver ^¬ . The invention based on various Favor ^¬ ter embodiments will be explained. It shows

1 is a seat belt device according to the invention with an applied first webbing section in the form of egg nes 3-point belt, and

Fig. 2 shows a seat belt device according to the invention with an applied first strap portion in the form of egg nes 3- Pu k ..- belt and an applied second belt band section in the form of a 2-point belt, and

3 shows a safety belt device according to the invention with the applied second webbing section, and

4 shows a safety belt device according to the invention with an applied lap belt portion of the first belt band portion, and

Fig. 5 shows a vehicle seat with a device for simplifying the entry.

FIG. 1 shows an occupant seated on a vehicle seat 10 who has put on a first webbing section 2 of a seat belt device 1 according to the invention. The first webbing section 2 is in the form of a 3-point belt with a diagonal belt section 6 crossing the occupant's chest and a lap belt section 7 crossing the occupant's pelvis. The diagonal belt section 6 and the lap belt section 7 can each be wound on independent belt retractors 8a and 8b and each can be locked in a belt lock 11 by means of a belt tongue, so that they are applied separately and also deposited again can. Alternatively, the end of the Diagonalgurtabschnittes 6 and the end of the lap belt section 7 can be locked via a common belt tongue in the buckle 11, in which case either the Diagonalgurtabschnitt 6 or the lap belt section 7 firmly connected to the belt tongue and the other section releasably connected to the Belt tongue is connected. Further, both the Diagonalgurtabschnitt 6 and the lap belt section 7 can be releasably connected to the belt tongue. Sensor means two symbolically illustrated are further 13a and 13b provided in the buckle 11, which detect the locking state of the belt tongues of the two ends of the Diagonalgurtabschnittes 6 and the Beckengurtab ^¬ section. 7 If only a belt tongue is provided and the Diagonalgurtabschnitt 6 and / or the Beckengurtab ^¬ section 7 are detachably connected to the seat belt tongue, detect the sensor devices 13a and 13b, the respective down the webbing portions with respect to the seat belt tongue.

Furthermore, a central control and processing device 15 is provided, which is signal technically connected to a Signaleinrich ^¬ device 4, the sensor devices 13a and 13b, a Steuerein ^¬ unit 16 for the autonomous driving functions and a traffic control device 17, the compounds so ^¬ probably via signal lines as well as wireless could be realized.

In the geometry to be recognized in FIG. 1, the seat belt device 1 corresponds to the geometry of a conventional 3-point safety belt. In FIG. 2, the occupant has additionally applied a second webbing section 3, which is designed as a 2-point belt and crosses the diagonal belt section 6 of the first webbing section 2. The second webbing section 3 is also provided with one end on a belt reel 9 wound up and locked with the free end of a belt tongue in a buckle 12. The advantage of this belt geometry is evident from the fact that the occupant is held back symmetrically over both shoulders. In Figures 3 and 4 further possible belt geometries are shown in which the occupant is retained only on the second webbing section 3 or on the lap belt section 7 of the first webbing section 2.

Based on a Änfangssituation in which the occupant losfährt and controls all driving functions themselves, the occupant is belted according to Figure 1 with the first webbing section 2 in the 3-point geometry. In the event that an autonomous driving function is or is to be activated via the control unit 16, ie one of the driving functions, such as ^braking , accelerating or steering, is carried out by a control device of the vehicle itself, a signal is emitted at the signaling device 4 corresponding warning to indicate that the activation of the autonomous driving function requires the application of the second webbing section 3. In this case, the signal device 4 emit both an optical and an acoustic signal. If the occupant then fastens the second webbing 3 to that shown in Figure 2 to be recognized cross geometry, goes out the signal of the signal means 4 and the autonomous driving function is activated so ^¬ far as it has not been activated before. Provided that the autonomous driving function does not require the application of the second strap supporting 3 forcing the autonomous driving function can also be activated independently of the application of the second strap supporting 3 and the signal of the signal means 4 le ^¬ diglich taken as a recommendation. The occupant can then lie down after the application of the second webbing section 3, while the vehicle is driving in a semi-autonomous or fully autonomous state. The reduction in safety due to the lower attention paid to driving is compensated by restraining the occupant over both shoulders instead of over one shoulder. In this case, the two Gurtbandabschnitte 2 and 3 do not necessarily fit snugly, it is sufficient if the two Gurtbandabschnitte 2 and 3 abut with a small slack, so that the occupant does not feel the two Gurtbandabschnitte 2 and 3, but immediately caught in an accidental movement becomes. The belt retractors 8a, 8b and 9 can each be provided with reversible drive devices, such as electric motors, which drive the belt shafts in the belt retractors 8a, 8b or 9 in the winding or unwinding direction and thereby control the belt slack so that in both Gurtbandabschnitten 2 and 3 identical withdrawal forces act or the same belt slack is present. The belt forces can be repeatedly increased by the drive means in the event of a detected possible critical driving situation in the short term or in the form of vibrations, whereby the occupant can be warned and even awakened in extreme cases, so that he can subsequently devote increased attention to driving again and, if necessary can take over the functions of autonomous driving again. Furthermore, the existing slack can be pulled out for earlier coupling of the occupant to the vehicle deceleration.

Alternatively, it is also possible if, for example, a predefined driving state such as, for example, driving below a defined speed is detected, via the signal device 4 to transmit information that the driving situation is off For safety reasons, it would be possible either to release the first webbing section 2 as a whole or the diagonal belt section 6 of the first webbing section 2 and to restrain the occupant only via the lap belt section 7 of the first webbing section 2 or only via the second webbing section 3 to the geometries shown in FIGS. 3 and 4 , Such a driving situation can occur, for example, in a traffic jam or at longer waiting times, in which the probability of more serious accidents is at least reduced.

In this case, in the central control device 15, the signals of the belt buckles 11 and 12 associated sensor devices 13a, 13b and 14, the signals of an autonomous driving controlling unit 16 and the signals of an external traffic control device 17, a traffic monitoring device or a road monitoring device to generate the Warning and information signals or to the control of the seat belt device 1 are considered. The control device 15 can also transmit a direct command for releasing the locks in the belt locks 11 and 12, provided that they are provided with appropriate actuators. The display of the information or warnings on the signaling device 4 and the manual release and locking or depositing and applying the Gurtbandabschnitte 2 and 3 or the Diagonalgurtabschnittes 6 and the lap belt section 7 is the but preferable, as this is still a manual operation of the occupant is required. The inmate must trigger the action himself. Thus, the likelihood of unintentional operation or inadvertent loosening of the webbing sections 2 and 3 can be avoided. In the control device 15, an algorithm can be stored for controlling the seat belt device 1 or to display the warning and Informa tion information on the signaling device 4, with the aid of which from the signals of the sensor devices 13a, 13b, 14 of the buckles 11 and 12, de signals the control unit 16 for autonomous driving and the ex distant traffic control device 17, the corresponding warning information or control signals are generated. For example, states are conceivable in which the vehicle is completely guided by the occupant. In such states, the occupant according to FIG. 1 is to be retained only with the first webbing section 2 in the 3-point geometry with a diagonal belt section 6 and a lap belt section 7. If the control unit 16 accepts certain or only individual functions for driving in a semi-autonomous or fully autonomous manner, then it makes sense for the occupants to be provided with the additional belt webbing section 3 (the 2-point belt) and taking into account the degree of danger and to provide the greatest possible wearing comfort with less retraction forces or less webbing sections by loosening the Diagonalgurtabschnittes 6 retain.

FIG. 5 shows a further improvement of the invention, in which the vehicle seat 10 can additionally be moved laterally on a slide rail system 19 into a position that is more favorable for the insertion. The seat belt device 1 is held by a detachable bracket 18 of the strap ends of the Diagonalgurtabschnittes 6 and the lap belt section 7 at a located in the middle of the vehicle attachment point in an ergonomic position, so that the occupant without disability by the seat belt device 1 on the vehicle seat 10 take place can.

Claims

Claims :

1 »Safety belt device (1) for a vehicle with at least one autonomous driving function with at least - a first strap section (2) and

a second webbing section (3),

characterized in that

At least one of the autonomous driving functions can be activated and / or deactivated as a function of the application of at least one of the webbing sections (2, 3), or

At least one of the two webbing sections (2, 3) is detachable as a function of the activation and / or deactivation of one of the autonomous driving functions, or of that

at least one signal device (4) is provided, which is activatable for delivering a signal requesting the occupants to deposit or apply a webbing section (2,3) if at least one of the autonomous driving functions is activated or deactivated or if a signal from an external traffic control device ( 17), traffic monitoring device or road monitoring device is transmitted or if a predefined driving condition exists,

2. Seat belt device (1) according to claim 1, characterized in that

the first webbing section (2) is formed by a 3-point belt with a diagonal belt section (6) crossing the occupant's chest and a lap belt section (7) crossing the pelvis of the occupant. Seat belt device (1) according to claim 2, characterized in that

the diagonal belt section (6) as a function of the activation of an autonomous driving function and / or in

Dependence on the existence of a predefined one

Driving condition is solvable.

Seat belt device (1) according to claim 3, characterized in that

the predefined driving state is a driving speed which is below a predetermined vehicle speed.

Seat belt device (1) according to one of the claims

2 to 4, characterized in that

the second webbing section (3) is formed by a 2-point webbing crossing the diagonal belt section of the 3-point webbing.

Method for controlling a seat belt device (1) for a vehicle having at least one autonomous driving function with

a first webbing section (2) and

a second webbing section (3),

characterized in that

at least one of the autonomous driving functions is activated and / or deactivated as a function of the application of at least one of the webbing sections (2, 3), or

at least one of the two webbing sections (2, 3) is released as a function of the activation and / or deactivation of one of the autonomous driving functions, or in that at least one signaling device (4) is provided, which is activated to deliver a signal requesting the occupants to deposit or apply a Gurtbandabschnittes when at least one of the autonomous driving functions is activated or deactivated or if a Signa I an external traffic control device (17), traffic monitoring device or road monitoring device is transmitted or if a predefined driving condition exists.

A method according to claim 6, characterized in that

at least one of the webbing sections (2, 3) is wound on a belt reel (8a, 8b, 9) with a reversible drive device, and

the reversible drive device in response to the activation or deactivation g one of the autonomous driving functions to reduce or increase the

Belt tension is driven in the webbing section.

Method according to one of claims 6 or 7, characterized in that

the first webbing section (2) is wound by means of a first and the second webbing section (3) by means of a second reversible drive device, and

the first and the second drive means for realizing identical belt forces in the two webbing sections (2, 3) are actuated when both webbing sections (2, 3) are applied.