Opening device for motor vehicle door

Abstract

The invention relates to an opening device for a motor vehicle door (1), comprising a drive (2; 2 ') for an opening element (3). 6, 7), at least one sensor (4) and a holding element (9) which acts on the opening element (3) and / or the motor vehicle door (1). According to the invention, the sensor (4) is designed as a crash sensor (4). Furthermore, the opening element (3) acts on the motor vehicle door (1) as a function of a collision signal of the collision sensor (4), and the retaining element (9) locks the motor vehicle door (1) and / or the opening element (3) in the opened position.

Description

Technical Field

[0001] The invention relates to an opening device for a motor vehicle door, comprising a drive for an opening element, at least one sensor and a retaining element for acting on the opening element and / or the motor vehicle door. Background Art

[0002] For aerodynamic reasons, attempts are increasingly being made today to open motor vehicles, in particular their motor vehicle doors, from the outside without door handles. Nevertheless, in order to be able to open the relevant motor vehicle door, an opening device is provided. The relevant motor vehicle door is usually opened with the aid of an opening device after a possibly preceding conversation between an operator wishing to enter and the relevant motor vehicle and, if necessary, a preceding unlocking. This corresponds to a gap between the motor vehicle door and the associated motor vehicle body.

[0003] The gap is set because the drive for the opening element or the door rubber seal force usually ensures that the relevant motor vehicle door is moved into a gap position that is easy to open. This usually corresponds to a gap of several centimeters relative to the motor vehicle body, which allows the motor vehicle door to be grasped by hand and swung open completely. This allows access to the interior of the motor vehicle.

[0004] In an opening device for a motor vehicle door as described in DE 10 2016 105 760 1, a first sensor associated with the drive element is provided, which can distinguish at least between an opening process of the motor vehicle door and a manual opening process. This should provide a lower weight and at the same time improved comfort.

[0005] In another prior art according to DE 10 2018 132 666 A1, the following measures are taken: a force measuring device with an associated sensor is accommodated in the opening device in such a way that the movement of the transmission support can be detected. The transmission support is a component of the transmission, which belongs to the electric drive for the opening element and is arranged between the opening element and the electric drive.

[0006] In the prior art of this type according to DE 10 2018 132 665 A1, a motor vehicle door or an associated door element can be held by means of an adjustment element or by means of an opening element. For this purpose, a locking rod is provided, which can be connected to the motor vehicle body in a form-fitting manner. This allows safe opening even on steep roads, since the motor vehicle door is prevented from swinging open uncontrolled by means of the holding element.

[0007] In addition, a sensor is provided, by means of which a pulling force applied by an operator to the motor vehicle door can be detected and thereby provides for the unlocking of the locking lever. As a result, the motor vehicle door is released from the vehicle body.

[0008] This prior art has proven itself in principle. However, if, for example, a motor vehicle with a handleless motor vehicle door is involved in an accident, the previous approach reaches its limits. Since the electric drive for the opening element is usually out of service, the arriving security personnel must take additional and separate measures to open the motor vehicle door. However, when the personnel arrive at the motor vehicle, they may be faced with the problem that, for example, the emergency operating handle cannot be directly seen or may itself be damaged. The present invention is intended to remedy this problem in general. Summary of the invention

[0009] The technical problem to be solved by the present invention is to develop such an opening device in such a way that even in the event of any accident or collision, the arriving security personnel can open the door simply and quickly.

[0010] In order to solve this technical problem, this type of opening device for a motor vehicle door is characterized within the scope of the present invention in that the sensor is designed as a collision sensor, and according to the collision signal, the opening element loads the motor vehicle door, and the retaining element locks the motor vehicle door and / or the opening element in the opened position.

[0011] First of all, it should be pointed out that the term "motor vehicle door" is to be understood broadly and comprehensively within the scope of the teaching of the present invention. This means that it involves both motor vehicle side doors and motor vehicle tailgates. It also involves, if necessary, front hoods, motor vehicle sliding doors, charging lids, etc. In other words, the term "motor vehicle door" according to the present invention not only includes motor vehicle side doors, which allow access to vehicle occupants who are located in the interior of the motor vehicle and who may be injured. In principle, it is of course also conceivable that in the event of a crash, the hood must be opened to turn off the engine, or that the tailgate must also be opened in order to remove dangerous cargo if necessary.

[0012] In either case, the relevant collision situation can first be detected with the aid of sensors designed as crash sensors. This usually corresponds to a deceleration of the relevant motor vehicle, the value of which exceeds several g (g stands for the acceleration due to gravity), typically several tens of g. In any case, an accident or a collision situation can be reliably detected with the aid of a crash sensor, which is typically connected to a control unit. In this case, the control unit itself in turn ensures that safety measures in the motor vehicle are initiated, for example, the seat belt tensioners are loaded, one or more airbags are triggered.

[0013] According to the invention, one or more crash signals detected by the sensor or crash sensor now cause the motor vehicle door to be acted upon by means of the opening element and transferred into its opened position. In this case, "taking up the opened position" can in principle also be achieved during a crash situation, but is usually only implemented after a crash situation. That is, as soon as the deceleration force measured by means of the crash sensor and acting on the motor vehicle has disappeared, the relevant crash signal is evaluated by the control unit in such a way that now and thereafter the associated motor vehicle door or doors can be opened.

[0014] Here, the "opening of the relevant motor vehicle doors" can be realized according to the possible seat occupancy. That is to say, for example, when only the driver's seat is occupied, the present invention is limited to only opening the driver's door. However, for safety reasons, it is usually also possible to take the following measures, that is, all motor vehicle doors of the motor vehicle are opened so that the arriving security personnel can fully enter the interior of the motor vehicle. For example, it is conceivable that the driver's door is stuck and the injured driver must be rescued via the front passenger door.

[0015] In this respect, the additionally activated retaining element ensures that the motor vehicle door is locked in its opened position and cannot swing open uncontrollably. Alternatively or additionally, the same applies to the opening element. This situation can occur, for example, in the event of a rollover or accident on a downhill road section and must of course be prevented so that potentially injured persons in the vehicle interior do not fall out and are not subject to possible additional injuries.

[0016] In general, the following measures can be taken here, namely, the opening element and the holding element are acted upon simultaneously. It is also conceivable that the opening element first acts upon the motor vehicle door and then the holding element locks the motor vehicle door in the opened position. Usually, in order to increase functional safety or to avoid any possible functional problems, the following measures are taken, namely, first the holding element is moved into its position locking the motor vehicle door or the opening element and then the opening element moves the motor vehicle door into the opened position.

[0017] In this case, the following measures are usually taken, namely, the value of the gap associated with the open position is several centimeters, for example 10 mm, 20 mm or more, usually up to 50 mm. Since the retaining element usually already takes up its position of locking the motor vehicle door when the opening element is loaded, it is necessary for the retaining element to be able to withstand any force applied by the opening element to the motor vehicle door and thus to the retaining element. This force can be up to about 1 kN. This opening force applied by the opening element to the motor vehicle door is often required in order to open any motor vehicle door that is fastened relative to the motor vehicle body after a collision. In most cases, the corresponding opening force is about 0.5 kN to 1 kN and can of course also be greater if necessary, if this is necessary.

[0018] In any case, the drive device for the opening element and the retaining element are designed accordingly to be able to absorb the opening forces, thereby ensuring that even after a crash and in the event of any delay in the motor vehicle door being opened relative to the motor vehicle body, the opening forces are sufficient to provide access to the motor vehicle interior.

[0019] Usually, the crash sensor, the drive for the opening element and the holding element or preferably a separate and additional drive for the holding element are connected to the common control unit already mentioned above. The control unit can thus control the drive for the opening element and, if necessary, other separate drives for the holding element as a function of the crash signal emitted by the crash sensor and evaluated by means of the control unit. As already explained, here typically the holding element first assumes its position for holding or fixing the motor vehicle door and only then is the opening element acted upon.

[0020] Different basic approaches are conceivable in this regard. Thus, the drive for the opening element can be designed as an electric drive. This drive can be used for normal operation. In addition, an accumulator drive can be provided for the opening element, which is only used in the event of a crash or after a crash. However, as an alternative to the accumulator drive, a chemical reaction drive can also be considered. Here, according to an advantageous design, the chemical reaction drive can be a pyrotechnic drive, i.e. a drive in which a chemical reaction is triggered, which usually causes a cylinder to expand, which then in turn loads the opening element to open the motor vehicle door.

[0021] However, in principle, alternatively and additionally, an electromechanical drive for the opening element can also be used. Such an electromechanical drive acts on the opening element regularly without a motor, wherein, in this regard, for example, molded memory metal, piezoelectric drive, etc. are used. The drive devices described above can be used individually or in any combination. For example, the accumulator drive can be designed as a spring accumulator or include one or more such spring accumulators. Here, the relevant accumulator can be filled with the necessary energy at the factory. In this case, the energy present in the accumulator is only used to transfer the opening element to its open position in the event of a collision. In this case, the motor vehicle door that is warped or locked relative to the vehicle body in the event of a collision can also be transferred to the open position by the accumulator.

[0022] However, instead of filling the accumulator drive or the accumulator or spring accumulator implemented here in the factory, the following measures can also be taken, that is, the accumulator is charged cyclically or at predetermined intervals during normal operation by the opening device or the drive for the opening element. As long as a spring accumulator is used as an accumulator drive or an associated accumulator, the spring accumulator can be designed so that when the open position is reached, no force is (anymore) applied to the retaining element that is already in its holding position or fixed position, thereby avoiding any damage. In addition, there is the following feasibility: the accumulator or spring accumulator involved is realized by combining two or more springs. It can be considered here that, as a component of the accumulator or spring accumulator, for example, a strong spring loads the opening element to the extent that the motor vehicle door is almost loaded into its open position or is loaded not far before the open position. In this case, another second weaker spring can ensure that the opening element completes the remaining stroke until the open position.

[0023] In this respect, the drive for the opening element can also be equipped with its own energy source that is independent of the vehicle battery. This provides the possibility that the drive for the opening element ensures and can ensure opening of the motor vehicle door even if any power supply line to the vehicle battery is to be interrupted in the event of a crash. The own energy source can be a battery, one or more capacitors, and a combination.

[0024] Of course, in the case of a parallel implementation of an electric drive for normal operation on the one hand and an accumulator drive for a crash on the other hand, the following measures can also be taken, namely, the two drives jointly load the opening element and thus jointly load the motor vehicle door. This joint loading can be realized in principle regardless of whether a crash occurs or not and independently of the crash situation, for example, in the following situation, that is, a particularly large force must be overcome on the motor vehicle door in order to be able to open the motor vehicle door. This situation occurs, for example, when the motor vehicle door is frozen. In this case, in addition to the sensor or crash sensor, a force sensor can also be provided, wherein in this case, the opening element is loaded by means of the electric drive for normal operation and, in addition, by means of the accumulator drive according to the signal of the force sensor.

[0025] In principle, the drive device involved can also load the trigger / release member for the mechanical energy accumulator. That is to say, in this case, the drive device itself is not used to load the opening element. Instead, the trigger is manipulated by the drive device, so that when the trigger is removed or opened, the mechanical energy accumulator can release the energy stored therein. The mechanical energy accumulator is the spring energy accumulator described in detail before in the simplest case. Here, the trigger can be designed as a claw that releases the spring energy accumulator, which is loaded by the drive device. In principle, the trigger or claw can be manipulated by the drive device for opening the element and for normal operation, for example, in the following manner: the drive device involved for normal operation is manipulated beyond a certain final position, loaded in the opposite direction, etc. In either case, the trigger usually requires only a small amount of energy from the drive device to manipulate it, so that the energy source for the drive device that may be additionally provided in this case can be designed to be particularly simple, small and lightly constructed and low in capacity independently of the motor vehicle battery.

[0026] In general, the opening element and / or the retaining element can be transferred to a position that releases the motor vehicle door by means of an actuating element. The actuating element can be a door handle, in particular an inner door handle. Alternatively or additionally, however, an actuating element that is preferably accessible from the outside can also be provided.

[0027] In this way, for example, there is the following feasibility scheme: loading the retaining element by the door handle or the inner door handle. Thus, for the personnel who are located inside the motor vehicle and have an accident, the motor vehicle door locked by the retaining element and located in the opened position after the collision can be easily opened. Of course, this operation possibility also takes into account the possible following situation, that is, a child lock function is provided on the rear door of the motor vehicle or a child lock can be installed. In this case, it has been proven that the operating member is mechanically connected to the opening element and / or the retaining element by a coupling that can be engaged and disengaged. In the "child lock open" position, the coupling is disengaged, so that the child who is located in the rear seat area cannot open the relevant motor vehicle door by the door handle or the inner door handle after the accident. This requires that the coupling is transferred to the engaged state, so that the relevant motor vehicle rear door can then be opened by the inner door handle as the operating member.

[0028] The operating element that can be touched from the outside can be an emergency handle or the like. For this reason, the relevant operating part can be equipped with a preferably flexible connecting part, such as a Bowden cable, through which the operating part establishes the necessary mechanical connection with the holding element and / or the opening element. In this regard, it can also be considered that the operating element that is involved and can be touched from the outside is marked in a collision situation, is mechanically slightly pushed open, or can be identified in other situations, so that the security personnel who arrive can see the operating element that can be touched from the outside and can directly open the motor vehicle door. For this reason, it is only necessary to remove the holding element from its locked or holding position of the motor vehicle door by the operating element that can be touched from the outside under normal circumstances, so that the relevant motor vehicle door can be easily swung open manually. Then the motor vehicle door involved is already in its open position after the collision situation, so that the security personnel who arrive can easily pass through the gap between the door leaf and the motor vehicle body to grab and swing open the corresponding door leaf.

[0029] Finally, it has been shown that the opening element and / or the retaining element act on a shaped part of the motor vehicle door. The relevant shaped part is particularly advantageously a latch mounted on the motor vehicle door. In most cases, a design is adopted in which the opening element and the retaining element act on the relevant latch. This clearly does not require any additional measures or additional designs on the motor vehicle door, since the latch acts accordingly and serves this purpose.

[0030] Thus, an opening device for a motor vehicle door is provided, which ensures that the motor vehicle door assumes its open position in the event of a crash. As a result, any person who has been in an accident and is located in the vehicle interior can be reached particularly easily and intuitively by an arriving security person. To this end, it is only necessary to remove the retaining element that locks the motor vehicle door in the open position or in the opened position. This can be done very simply manually through the gap between the motor vehicle door and the vehicle body in the opened position or in the open position assumed by the motor vehicle door.

[0031] However, for example, an arriving security person can also load an externally accessible operating element for this purpose, by means of which the retaining element is transferred from its position of locking the motor vehicle door to a position of releasing the motor vehicle door. Thus, the motor vehicle door can then be directly accessible and can be easily swung open manually.

[0032] In this respect, it is also advantageous to provide that a motor vehicle door that is twisted or jammed after a crash can in principle be opened. For this purpose, the invention generally and by way of example uses an accumulator drive and / or a chemical reaction drive and / or an electromechanical drive in addition to a normally operating electric drive for the opening element (i.e., whether a crash has occurred or not). The drive in question provides an opening force that significantly exceeds the opening force of the normally operating electric drive. For example, with such an accumulator drive, for example, using a spring accumulator, it is possible to achieve and implement an opening force of up to 1 kN or more.

[0033] This greatly improves the safety of any vehicle occupants involved in an accident and makes the work of the arriving security personnel significantly easier. Because in the most favorable case, for example, any tools or pry bars for prying open one or more motor vehicle doors are not necessary, because the opening device according to the invention already ensures that the motor vehicle door has already assumed its open position after the collision. This is a major advantage of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The invention is described in detail below with reference to the accompanying drawings which show only one embodiment; in the drawings:

[0035] Figure 1 An overview of the principle of the opening device according to the invention is shown,

[0036] Figure 2 Show according to Figure 1 Schematic detail of the opening device,

[0037] Figure 3 A variant embodiment of the present invention is shown.

[0038] Figure 4 Another embodiment variant of the present invention is shown, and

[0039] Figure 5 The drive device for an opening device for a motor vehicle door is shown in relation to normal operation. DETAILED DESCRIPTION

[0040] The drawing shows an opening device for a motor vehicle door 1. The motor vehicle door 1 is a motor vehicle front door 1 in this embodiment. However, the motor vehicle door 1 can also be designed as a motor vehicle rear door, a tailgate, etc., as already described at the beginning. For this purpose, the opening device for the motor vehicle door 1 first has a drive device 2 for an opening element 3. In addition, a Figure 14, which according to the invention is a crash sensor 4. That is, an accident or a crash of the associated motor vehicle can be sensed by means of the sensor or crash sensor 4. In this case, this usually corresponds to a deceleration significantly above 5g.

[0041] according to Figure 1 It can be seen that in addition to the drive 2 for the opening element 3, within the scope of this embodiment and without limitation, a further energy storage drive 7 or chemical reaction drive 6 is provided, by means of which the opening element 3 can be loaded instead of the drive 2 for normal operation, in particular in the event of a crash. In this context, a triggering element 8 is also provided, which will be explained in more detail below.

[0042] Of particular importance in this case is the loading of the holding element 9 of the motor vehicle door 1. It can be seen that in normal operation, the drive 2 for the opening element 3, the sensor or crash sensor 4, the chemical reaction drive 6 or alternatively the energy storage drive 7, and the holding element 9 or the associated own drive for the holding element 9 are connected to a common control unit 5. In this way, the control unit 5 can be designed and operated as a whole so that, depending on the crash signal from the crash sensor 4, the opening element 3 or the chemical reaction drive 6 or the energy storage drive 7 loads the opening element 3 and thus the motor vehicle door 1. In addition, the control unit 5 ensures in this embodiment that the holding element 9 locks the motor vehicle door 1 in the opened position.

[0043] Here, the drive devices 2, 6, 7 can be distinguished in terms of function and concept, that is, the drive device 2 for normal operation is referred to as the normal operation drive device 2 below, and the alternative drive device, that is, the accumulator drive device 7 or the chemical reaction drive device 6, should be referred to as the collision operation drive device 6, 7. Therefore, the collision operation drive device 6, 7 is only used in the following case according to this embodiment, that is, a collision situation has been sensed by means of the collision sensor 4. Of course, in principle, it is also conceivable to operate the normal operation drive device 2 and the two collision operation drives 6, 7 together. However, this is not described in detail. Another possibility is also not described, that is, as an alternative or additional collision operation drive device 6, 7, an electromechanical drive device can also be used, as has been described in detail in the introduction to the specification.

[0044] The drive devices 2, 6, 7 can each be equipped with a separate energy source 10 that is independent of the vehicle battery. In this exemplary embodiment and without limitation, the separate energy source 10 can be a storage battery or a battery, one or more capacitors, etc. In addition, the drive devices 2; 6, 7 and in particular the crash-operated drive devices 6, 7 or the accumulator drive device 7 can be equipped with a triggering element 8. The triggering element 8 ensures that the mechanical energy storage device 11 releases the energy stored therein. For this purpose, a small amount of electrical energy is sufficient to actuate the triggering element 8.

[0045] Only the actuating elements 12, 13 are shown schematically, by means of which the opening element 3 and / or the retaining element 9 can be acted upon and transferred into a position that releases the motor vehicle door 1. The actuating elements 12, 13 are door handles or inner door handles 12 according to the exemplary embodiment. Within the scope of the example shown, the retaining element 9 can be transferred from its position that locks the motor vehicle door 1 to its position that releases the motor vehicle door 1 by means of the inner door handle 12. For this purpose, the retaining element 9 is simply pivoted relative to the latch 15, as can be done according to the embodiment. Figure 5 In fact, in its position in which the motor vehicle door 1 is locked, the retaining element 9 engages between two bows of the associated locking catch 15 and ensures that the opened motor vehicle door 1 cannot swing open in an uncontrolled manner.

[0046] The operating element 13, which is additionally shown schematically and accessible from the outside, performs a similar function. For this purpose, the operating element 13 can be connected to the retaining element 9 by means of a preferably flexible connection 14. The flexible connection 14 is a Bowden cable according to this embodiment. Accordingly, the loading of the operating element 13, which can be accessed from the outside, causes the retaining element 9 to be transferred again from its position of locking the motor vehicle door 1 to its position of releasing the motor vehicle door 1. As a whole, the motor vehicle door 1 can thus be easily swung open in the following manner, that is, for example, a security person who arrives after the described collision situation grasps the motor vehicle door 1 in the opened position through the gap relative to the motor vehicle body and thus swings the motor vehicle door 1 open.

[0047] The other possibility is not explicitly shown, that the actuating element 12, 13 in question, in particular the inner door handle 12, is mechanically coupled to the opening element 3 or the retaining element 9 via an engageable and disengageable coupling. This provides the possibility that the child lock function, for example, on the rear door of a motor vehicle, which is not shown here, can always be realized and implemented unchanged. If the associated child lock unit is in its "child lock open" position, the disengaged coupling in this case ensures that the retaining element 9 cannot be rotated by the inner door handle 12, so that after a crash, its position of locking the motor vehicle door 1 remains unchanged. This only ends when the retaining element 9 is transferred, for example, from the outside from its position of locking the motor vehicle door 1 to a position of releasing the motor vehicle door, or the coupling already mentioned is engaged. Since in this case the inner door handle 12 is mechanically coupled to the retaining element 9, the loading of the inner door handle 12 ensures that the retaining element 9 is transferred from its position of locking the motor vehicle door 1 to a position of releasing the motor vehicle door 1.

[0048] The operating principle is as follows. If the motor vehicle is moving in normal operation, after the question-and-answer dialogue described in the introduction to the description and after unlocking and, if necessary, electrically opening the motor vehicle lock (not shown here), the opening element 3 is acted upon by means of the normal operation drive 2. To this end, the normal operation drive 2 ensures that the motor vehicle door 1 is moved relative to the opening in normal operation. Figure 1 The motor vehicle body, which is only schematically shown in the figure, is transferred into its open position. In this open position, the motor vehicle door 1 is spaced a few centimeters apart from the motor vehicle body, so that an operator who wishes to enter can grasp and swing the motor vehicle door 1 through the gap.

[0049] If a crash situation now occurs, this is usually associated with the fact that the normal operating drive 2 is electrically disconnected from the vehicle battery and therefore usually does not (any longer) operate. In this case, the energy source 10 independent of the vehicle battery ensures that the crash operating drive 6, 7 always operates and can transfer the vehicle door 1 to its opened position or open position. This usually occurs after the crash situation in this embodiment. That is, the crash sensor 4 first registers the crash situation and reports it to the control unit 5. After the crash situation or the corresponding deceleration has disappeared, the control unit 5 evaluates the corresponding crash signal of the crash sensor 4 and ensures that the crash operating drive 6, 7 is activated by means of the energy source 10 independent of the vehicle battery.

[0050] The crash-operation drive 6, 7 itself now ensures that after a crash, the motor vehicle door 1 is transferred to the open position according to this embodiment by means of the energy storage drive 7 or when using the chemical reaction drive 6 or both. In this case, the crash-operation drive 6, 7 can exert high opening forces on the opening element 3 or the motor vehicle door 1, which can be, for example, 1 kN or more. In this way, a warped or jammed motor vehicle door can be opened automatically under normal circumstances and after a crash.

[0051] Previously, the retaining element 9 had already been moved into its position locking the motor vehicle door 1. Therefore, within the scope of this exemplary embodiment, the crash-operated drive devices 6, 7 ensure that the motor vehicle door 1 is not only moved into its opened position by means of the opening element 3, but also that the motor vehicle door 1 and, in particular, the latch 15 are still moved against the retaining element 9. In order to keep the forces achieved here low, the corresponding Figure 4 In the single view in FIG. 7 , the following measures can be taken in connection with the energy storage drive 7 or the mechanical energy storage 11 implemented here, namely, the energy storage 11 charges the motor vehicle door 1 only until the open position is reached, so that the stop on the retaining element 9 is blocked or at least its effect is reduced. For this purpose, it is conceivable within the scope of a variant not shown to design the mechanical energy storage device in two parts to a certain extent, with a strong spring and a weak spring.

[0052] The strong spring ensures in this respect that the motor vehicle door 1 is opened almost to the point where the open position is reached by loading the opening element 3. In this case, the weak spring ensures that the remaining travel is completed until the open position is reached and, in particular, that the catch 15 is moved against the retaining element 9. In either case, the catch 15 generally serves as a profiled part of the motor vehicle door 1, which interacts with the opening element 3 and the retaining element 9 according to this embodiment.

[0053] This can be best based on Figure 5 . It is clearly shown here that the opening element 3 is acted upon by the electric drive 2 as a whole via the rod transmission and moved against the catch 15. The act of the electric drive 2 causes the opening element 3 to move the catch 15 “to the left” within the scope of this exemplary embodiment, which corresponds to the motor vehicle door 1 being opened “to the right” relative to the motor vehicle body until the open position is reached.

[0054] List of reference numerals:

[0055] Motor vehicle door 1

[0056] Drive 2

[0057] Opening element 3

[0058] Collision sensor 4

[0059] Control unit 5

[0060] Drive device 6

[0061] Accumulator drive device 7

[0062] Collision operation drive 6, 7

[0063] Trigger 8

[0064] Retaining element 9

[0065] Energy Source 10

[0066] Accumulator 11

[0067] Door handle 12

[0068] Operating parts 12, 13

[0069] Operating element 13

[0070] Connector 14

[0071] Lock 15

Claims

1. An opening device for a motor vehicle door (1), comprising a drive device (2; 6, 7) for an opening element (3), at least one sensor (4) and a retaining element (9) for loading the opening element (3) and / or the motor vehicle door (1), It is characterized in that The sensor (4) is designed as a collision sensor (4), and according to the collision signal, the opening element (3) loads the motor vehicle door (1), and the retaining element (9) locks the motor vehicle door (1) and / or the opening element (3) in the opened position.

2. The opening device according to claim 1, characterized in that: The collision sensor (4), the drive (2; 6, 7) for the opening element (3) and, if necessary, a separate drive for the holding element (9) are connected to a common control unit (5).

3. The opening device according to claim 1 or 2, characterized in that: The drive (2; 6, 7) for the opening element (3) is designed as an electric drive (2) and / or an energy storage drive (7) and / or a chemical reaction drive (6) and / or an electromechanical drive.

4. The opening device according to any one of claims 1 to 3, characterized in that The drive device (2; 6, 7) is equipped with its own energy source (10) which is independent of the vehicle battery.

5. The opening device according to any one of claims 1 to 4, characterized in that The drive device (2; 6, 7) acts on a triggering element (8) for a mechanical energy storage device (11).

6. The opening device according to any one of claims 1 to 5, characterized in that The opening element (3) and / or the retaining element (9) can be moved by means of an actuating element (12, 13) into a position which releases the motor vehicle door (1).

7. The opening device according to claim 6, characterized in that The actuating element (12, 13) is designed as a door handle (12), in particular an inner door handle (12), and / or preferably as an actuating element (13) accessible from the outside.

8. The opening device according to claim 7, characterized in that The actuating element (13) is connected to the retaining element (9) and / or the opening element (3) by means of a preferably flexible connection (14), for example a Bowden cable (14).

9. The opening device according to any one of claims 6 to 8, characterized in that The operating parts (12, 13) are mechanically connected to the opening element (3) and / or the retaining element (9) via a connecting portion that can be engaged and disengaged.

10. The opening device according to any one of claims 1 to 9, characterized in that The opening element (3) and / or the retaining element (9) acts on a profile (15) of the motor vehicle door (1), for example on a latch (15) mounted on the motor vehicle door (1).

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