EP3911822A1

EP3911822A1 - Motor-vehicle door lock

Info

Publication number: EP3911822A1
Application number: EP19835614.9A
Authority: EP
Inventors: Ömer INAN; Holger Schiffer; Michael Scholz; Peter Szegeny; Andreas Schmitz; Thomas SCHÖNENBERG
Original assignee: Kiekert AG
Current assignee: Kiekert AG
Priority date: 2019-01-14
Filing date: 2019-12-13
Publication date: 2021-11-24
Also published as: DE102019110334A1; WO2020147877A1

Abstract

The invention relates to a motor-vehicle door lock which is equipped with an electromechanical opening drive (1) for a locking mechanism. The motor-vehicle door lock is additionally equipped with a securing unit (6, 6', 7, 8') and a handle (H, H') which is queried by a sensor (6). The query corresponds to an electric supply to the opening drive (1) solely in the "OFF" position of the securing unit (6, 6', 7, 8), whereas the opening drive (1) is not electrically supplied in the "ON" position. According to the invention, the opening drive (1) acts not just on the locking mechanism but also on a coupling lever (3, 3'), to which the handle (H, H') can additionally be mechanically coupled.

Description

description

Motor vehicle door lock

The invention relates to a motor vehicle door lock, with an electromechanical opening drive for a locking mechanism, furthermore with a security unit, and with a handle queried by a sensor, which corresponds only to the electrical position of the opening drive in the "securing off" position, while in the position "Secure on" the opening drive is not acted on.

A motor vehicle door lock of the construction described at the beginning is described in DE 10 2015 108 738 A1 by the applicant. Similar configurations are the subject of further publications DE 10 2013 006 521 A1 and DE 10 2012 020 424 A1.

The electromechanical or purely electrical opening of a locking mechanism following the query of a sensor on the associated handle is becoming increasingly accepted in practice and is often referred to here as “open-by-wire”. The reasons for this lie in a particularly comfortable and quiet operation of the locking mechanism in order to be able to open an associated motor vehicle door. A further advantage is that the fuse unit can be implemented in this context purely in terms of circuitry or by means of corresponding software specifications.

If the safety device is a child safety device, for example, an additional child safety sensor can be used to simply differentiate between, for example, the two function positions "Child safety device ON" and "Child safety device OFF", as is the case with the generic state of the art according to DE 10 2015 108 738 A1 explained in detail. In the "Childproof lock ON" position the electromechanical opening drive for the locking mechanism is generally deactivated, so that a child or a vehicle occupant in general cannot open the relevant motor vehicle door lock from the inside even when the handle is actuated and the corresponding sensor triggered accordingly. This is typically a rear door or rear side door.

This means that in this case the handle, which is designed as an inner handle, has no effect in the "Childproof lock ON" function position. In contrast, the door in question can still be opened from the outside. This is because an associated outside handle is not influenced by the functional position of the child safety unit in question, so it can still provide for an electromechanical or electrical opening of the associated locking mechanism.

In contrast, the "Childproof lock OFF" position also allows the rear door in question to be opened electrically from the inside. To do this, it is only necessary to operate the inside handle. The sensor on the inside handle receives a corresponding signal, which is usually implemented by a control unit and leads to the opening drive being acted upon. In a comparable way, other security units such as, for example, anti-theft security units can also be implemented in terms of control technology with the aid of the like electromechanical opening drives. For example, the “anti-theft lock ON” function typically corresponds to the fact that both the inner and outer handles are empty or do not correspond to the actuation of the electromechanical opening drive. Only when the "anti-theft protection OFF" position is reached does the relevant handle be opened to open the locking mechanism and thus also the associated motor vehicle door.

The opening drives described and their implementation in terms of control technology have generally proven their worth. However, there is usually an additional one mechanical redundancy is required, which comes into play especially when a crash of the associated vehicle is observed or the so-called crash occurs. The crash case corresponds to the fact that the motor vehicle in the simplest case has abnormal delays of several g (> 5 g), which are typically associated with an impact with an obstacle. In such a crash, there is a risk that the electromechanical opening drive will fail because either the associated battery and / or an electrical lead are destroyed. For this reason and to allow incoming security forces to continue to open the appropriately equipped motor vehicle door, mechanical redundancies are required.

At this point, the further prior art according to WO 2014/07941 1 A2 proposes a motor vehicle door lock with a locking mechanism and an electromechanical opening drive for the locking mechanism, which has an additional drive. With the help of this additional drive, an actuating lever chain can be moved into its "LOCKED" position if necessary. Only then is an opening signal generated for the drive for electrically opening the locking mechanism.

The operating lever chain is always in its "LOCKED" position, even when the electric drive is energized to open the locking mechanism. Only in the event of an emergency opening or in the event of a crash is the procedure carried out so that the actuating lever chain is first moved to its “UNLOCKED” position. Rescue personnel can thereby open an associated motor vehicle door, for example. All that needs to be done is to mechanically apply the handle. This has generally proven itself.

However, the prior art according to WO 2014/07941 1 A2 requires at least one additional drive. Apart from the fact that such drives may be susceptible to malfunctions, they require considerable effort constructive and especially financial expenses. The invention seeks to remedy this.

The invention is based on the technical problem of further developing such a motor vehicle door lock so that the manufacturing outlay is reduced, taking into account a particularly simple construction.

To solve this technical problem, a generic motor vehicle door lock in the context of the invention is characterized in that the electromechanical opening drive is set up to implement all the functional positions alone and not only works on the locking mechanism for opening, but in particular in the event of a crash also on at least one clutch lever which the handle is also mechanically connected to the locking mechanism or can be connected.

Within the scope of the invention, the electromechanical opening drive has a multiple function and in particular a double function. In fact, not only the locking mechanism can be opened with the help of the opening drive. In addition, the opening drive also ensures that the at least one clutch lever is acted upon, that is typically transferred from its regularly assumed position "UNCUPLED" to the position "INCLUDED". An actuating lever chain equipped with the respective clutch lever is consequently closed and the required mechanical redundancy is guaranteed. In contrast to the state of the art, all this can be achieved with just one motor, namely the electromechanical opening drive. This single motor is therefore able to display all functional positions in the sense of "electrical opening", "locking / unlocking", "child-proofing / child-proofing", "anti-theft / anti-theft unlocking" etc. As a rule, the design is also such that the handle is or can be mechanically coupled to the locking mechanism via the clutch lever, the clutch lever only being or being engaged in the event of a crash and, if necessary, in the "fuse OFF" position and for a mechanically continuous connection for opening the locking mechanism ensures and otherwise "UNCUPLED" disconnects the mechanical connection of the handle to the locking mechanism.

According to the invention, the handle in question is additionally mechanically coupled to the locking mechanism via an associated actuating lever chain with the clutch lever as a component of this actuating lever chain. The clutch lever is consistently in its "DISCONNECTED" position. In this way, a mechanical connection of the handle to the locking mechanism is regularly disconnected. In this case, the mechanical control lever chain is "LOCKED". If the clutch lever is engaged, the status is "UNLOCKED".

The clutch lever is or is only engaged when the previously mentioned crash occurs and if the additional condition that the fuse unit is in its "fuse OFF" position is met. As a result, the clutch lever can simultaneously provide a mechanically continuous connection from the handle to the locking mechanism and thus the mechanical opening of the locking mechanism.

Here, the invention is based first of all on the knowledge that in the “fuse OFF” position of the security unit, the opening drive for the locking mechanism is energized in the first place or can act on the locking mechanism. If, on the other hand, the fuse unit is in the "fuse ON" position, the opening drive for the locking mechanism is usually deactivated. In this way, according to the invention, the opening drive for the locking mechanism, which is basically activated in the “fuse OFF” position of the security unit, can actuate the respective Take over the additional function already described, namely in such a way that, in the event of a crash, the clutch lever is moved from its "DISCONNECTED" position to the "INCLUDED" position. This means that the opening drive works advantageously and in the context of a preferred embodiment of the invention not only on the locking mechanism, but also on the clutch lever.

As a result, the opening drive according to the invention takes over the function of the additional drive, as described in WO 2014/07941 1 A2. In this way, the functions of the opening drive and the additional drive, as it were, can be combined and brought into one another, which leads to a particularly simple embodiment with significantly reduced costs compared to the prior art. In addition, the basic functionality is increased by using a single drive, namely the electromechanical opening drive alone. Finally, there is also the fact that the motor vehicle door lock is also consistently in the "LOCKED" position due to the "CLUTCHED" position of the clutch lever. Only in the event of a crash and, if applicable, in the "fuse OFF" position of the fuse unit, is this practical functional state "LOCKED" left, by engaging the clutch lever and moving the motor vehicle door lock to the "UNLOCKED" position. This is where the main advantages can be seen.

As a rule, however, the clutch lever remains in the disengaged position in the "fuse ON" position, regardless of a crash. This means that the "fuse ON" position of the fuse unit corresponds to the clutch lever assuming and maintaining its disengaged position, even in the event of a crash. Here, the invention is based on the knowledge that the clutch lever is only a handle of the motor vehicle door lock is assigned, while a mostly provided additional handle still fulfills its function and can also do so.

As a rule, the safety device is a child safety device. Accordingly, the handle queried with the sensor with the associated actuating lever chain is designed as an inner handle. Even if the clutch lever remains in the disengaged position in the "securing ON" position even in the event of a crash, and consequently the associated motor vehicle door cannot be opened with the help of the inside handle, the motor vehicle door can still be opened and unchanged via an outside handle, which is regularly added is provided.

The outer handle may again be assigned a sensor which detects the action on the outer handle and converts it to the action on the electromechanical opening drive in normal operation. In principle, this can also be done and implemented in a comparable manner in the event of a crash. In the event of a failure of the electromechanical opening drive in the event of a crash, the locking mechanism may be opened via its own then effective mechanical actuating lever chain. For this purpose, the electromechanical opening drive can also work on a clutch lever of an external lever chain. This is again transferred from its engaged to the disengaged position in order to ensure mechanical redundancy in the event of a crash.

According to the invention, the electromechanical opening drive for the locking mechanism, as described, takes on a double or multiple function in such a way that the locking mechanism can be opened by means of a motor and, in addition, the clutch lever can optionally be engaged in the “safety OFF” position and in the event of a crash. For this purpose, the design is usually made so that the opening drive in one direction of rotation to the locking mechanism Actuates opening and engages the clutch lever in the other direction of rotation in the event of a crash and, if necessary, in the "fuse OFF" position.

Here, the invention further assumes that the opening drive is generally equipped with a worm wheel, which can perform the two previously described movements in one and the other direction of rotation without any problems. For this purpose, the worm wheel can be equipped with an opening contour for the locking mechanism on the one hand and a coupling contour for the coupling lever on the other hand.

In most cases, a control unit is also provided. With the help of the control unit, not only the sensor on the handle, but also a crash sensor and a safety sensor are generally queried. With the help of the fuse sensor, the desired position of the fuse unit can be specified in the sense of "fuse ON / OFF" and selected, for example, by an operator. In this respect, the fuse sensor may in principle also be a switch or selector switch.

With the help of the crash sensor, the control unit is informed whether or not there is a crash. Depending on this and also the triggering of the sensor on the handle and the functional position of the fuse unit, the clutch lever is then engaged in the event of a crash and possibly in the "fuse OFF" position of the fuse unit.

The clutch lever itself is generally mounted between an operating lever interacting with the handle and a locking lever. The operating lever and the locking lever form part of the previously mentioned operating lever chain. In addition, the design is usually made such that the locking lever interacts with the worm wheel in order to move the clutch lever from its consistently assumed position "UNLOCKED" to the state "INLOCKED". As a result, a motor vehicle door lock is made available which is particularly simple, inexpensive and functionally reliable. By using only a single motor or drive, which ensures both the opening of the locking mechanism and the mechanical engagement of the actuating lever chain in the event of a crash, functional advantages over the prior art are also achieved.

The invention is explained in more detail below on the basis of a drawing illustrating only one exemplary embodiment; show it:

Fig. 1 shows the motor vehicle door lock according to the invention in a schematic

Overview,

Fig. 2 is a flowchart which describes the general function in detail and

3, 4 a modified embodiment.

A motor vehicle door lock is shown in the figures. This has a locking mechanism consisting of a rotary latch and pawl, which is not shown in detail. On the other hand, one can see an electromechanical opening drive 1 for the locking mechanism, which in the exemplary embodiment is reduced to a worm wheel 1, which can carry out indicated rotary movements in a clockwise and counterclockwise direction about an axis 2. This is ensured by an electric motor, not shown. According to the exemplary embodiment, a rotary movement of the worm wheel 1 counterclockwise corresponds to the locking mechanism being opened.

For this purpose, the worm wheel 1 works either directly or below via an opening contour, not shown, in the counterclockwise direction Interposition of a release lever on a pawl as part of the locking mechanism and lifts it from its engagement with the rotary latch. In the direction of rotation of the worm wheel 1 in the counterclockwise direction, not only is the “electrical opening” of the locking mechanism realized, but in this direction of rotation in the counterclockwise direction the motor vehicle door lock is also locked, as will be explained in more detail below. In contrast, the clockwise rotation of the worm wheel 1 corresponds to the fact that the motor vehicle door lock is unlocked. At the same time, the worm wheel 1 ensures that a clutch lever 3 is engaged during this clockwise rotation. In contrast, the movement of the worm wheel 1 in the counterclockwise direction corresponds to the disengagement of the clutch lever 3 and consequently to the “locked” basic position shown consistently in FIGS. 1 and 3.

The clutch lever 3 is part of an inner mechanical operating lever chain 3, 4, 5, to which, in addition to the clutch lever 3, an operating lever 4 and a locking lever 5 belong. In the actuation lever 4 is an inner actuating lever 4, which is mechanically coupled to a handle or inner handle H only indicated. An additionally provided outer handle H ', like a further mechanical actuating lever chain belonging to the outer handle H', is not shown in FIG. 1 for reasons of clarity, but is the subject of FIGS. 3 and 4. Because in FIGS. 3 and 4, the External handle H 'shown in connection with a further actuating lever or external actuating lever 4' and locking lever 5 ', which together with the clutch lever 3' define the outer mechanical actuating lever chain 3 ', 4', 5 '.

The handle H, H 'is each equipped with a sensor 6 which detects movements of the handle H, H' or inner handle H and transmits them to a control unit 7. In principle, you can work in such a way that a one-time application of the handle H, H 'in question is evaluated by the control unit 7, for example in such a way that the electromechanical opening drive 1 is acted on with the help of the control unit 7 and at the same time the motor vehicle door lock is opened. In this case, a single actuation of the handle H, H 'may open the motor vehicle door lock in the sense of an "override function". As a rule, such an "override function" is dispensed with. Then it is necessary to apply the relevant handle H, H 'twice in succession for a corresponding opening process.

3 and 4, the sensor 6 is not shown on the handle H, H 'or outer handle H', but is nevertheless present. The control unit 7 is also electrically connected to a crash sensor 8, with the aid of which the occurrence of a crash event described in detail can be sensed.

Finally, the basic structure also includes a securing unit 6, 7, 8, which essentially consists of that of the handle H, H 'or

Inside handle H assigned sensor 6 of control unit 7 and

Crash sensor 8 is composed. The motor vehicle door lock shown can be transferred into at least the two positions “fuse ON” and “fuse OFF” with the aid of the fuse unit 6, 7, 8. In the

Safety unit 6, 7, 8 is a child safety unit 6, 7, 8 within the scope of the exemplary embodiment

Security unit 6, 7, 8 but also be designed as an anti-theft device, as has already been described.

When the fuse unit 6, 7, 8 is in the "fuse OFF" position, an action on the handle H, H 'or inner handle H by an operator leads to a corresponding signal from the sensor 6 being evaluated by the control unit 7 to the effect that With the help of the control unit 7, the electromechanical opening drive 1 is acted upon. In contrast, the Position "fuse ON" of the fuse unit 6, 7, 8 so that the opening drive 1 is not acted upon. In this way, the exemplary embodiment with the child safety unit 6, 7, 8 implemented there ensures that the rear door or rear side door of a motor vehicle equipped with the relevant motor vehicle door lock can be opened from the inside in the “child safety OFF” position using the inner handle H, whereas in the "Childproof lock ON" position an action on the handle or inner handle H goes empty or does not correspond to an electrical action on the opening drive 1. Independently of this, the motor vehicle door lock can be opened at any time via the outer handle H ', that is to say detached from the functional position of the child safety unit 6, 7, 8.

According to the invention, the electromechanical opening drive 1 works not only on the locking mechanism, but also on the clutch lever 3, 3 'with which the handle H, H' or inner handle H is additionally mechanically coupled to the locking mechanism in the case of example. This means that the opening drive 1 assumes a multiple function or double function on the one hand as an opening drive for "electrical opening" and on the other hand in the sense that the motor vehicle door lock shown is additionally "unlocked" by coupling the clutch lever 3, 3 ', as will be explained in more detail below is explained.

This is because the clutch lever 3, 3 'is continuously in its solid position "DISCONNECTED" (see FIGS. 1 and 3). Accordingly, the motor vehicle door lock also assumes its "LOCKED" position. This makes the operating lever chain 3, 4, 5 or 3 ', 4', 5 'interrupted from the handle H, H' or inner handle H or outer handle H 'to the locking mechanism, which at least applies to normal operation, because in this case the locking mechanism is opened electrically as soon as a movement of the inner handle H is detected with the aid of the sensor 6 and transmitted to the control unit 7 in order to use it to open the opening drive 1 in the exemplary embodiment to act counterclockwise so that the locking mechanism can be opened electrically in this way.

As already explained, the handle H, H 'or inner handle H is additionally mechanically coupled to the locking mechanism via the clutch lever 3 or the actuating lever chain 3, 4, 5. The overall design is such that the clutch lever 3 is engaged only in the event of a crash and in the “fuse OFF” position of the fuse unit 6, 7, 8. Only then does the clutch lever 3 provide a mechanically continuous connection from the handle or inner handle H to the locking mechanism, which enables the locking mechanism to be opened. Otherwise, the clutch lever 3 is in its "DISCONNECTED" position, as shown in solid lines, and this also results in the mechanical separation of the inner handle H from the locking mechanism.

The clutch lever 3, 3 'remains in the "fuse ON" position in its "disengaged" position. This happens regardless of the crash. These individual functional positions are reproduced in the functional or flow diagram according to FIG. 2 and are explained in more detail below. The clutch lever 3, 3 'is mounted between the actuating lever 4, 4' interacting with the handle H, H 'and the locking lever 5, 5'. In addition, the design is such that the locking lever 5, 5 'interacts or can interact with the worm wheel 1 or the electromechanical opening drive 1, in order to move the clutch lever 3, 3' from its consistently assumed position "UNCUPLED" to the state "INCLUDED" to convict.

If one assumes the functional position "UNCUPLIED" of the clutch lever 3, 3 ', the clutch lever 3, 3' can be "engaged" in this way and the motor vehicle door lock as a whole can be moved from its "LOCKED" position to the radio Transfer the "UNLOCKED" position by actuating the electromechanical opening drive 1 or its worm wheel 1 clockwise. In this case, a coupling contour 9 on the worm wheel 1 comes to rest on a nose 10 of the locking lever 5, 5 '. The worm wheel 1 also has an opening contour, which interacts in the other direction of rotation - counterclockwise - with the locking mechanism and which is not expressly shown because it is located on the rear of the worm wheel 1 in the example.

As soon as the worm wheel 1 is rotated clockwise about its axis 2, the coupling contour 9 for the coupling lever 3 moves against the nose 10 of the locking lever 5. As a result, the locking lever 5 is pivoted about its axis 11 in the counterclockwise direction indicated in FIG. In this process, an auxiliary lever 12 mounted on the locking lever 5 is simultaneously moved downward as indicated. As a result, the clutch lever 3 can be moved up to its "INPUT" position compared to the actuation lever 4. In the "INPUT" position of the clutch lever 3, the actuating lever chain 3, 4, 5 is closed and there is a mechanically continuous connection starting from the inner handle H up to the locking mechanism. However, this functional position is only assumed in the event of a crash and only if the safety unit 6, 7, 8 or child safety unit 6, 7, 8 also has the "safety OFF" position.

For this purpose, not only the crash sensor 8 is queried with the aid of the control unit 7, but also an additionally provided safety sensor 13, which is designed, for example, as a switch and is located inside a motor vehicle in order to be acted upon here by an operator. This means that the operator selects "safety device ON" or "child safety device ON" or "safety device OFF" or "child safety device OFF" by applying the safety sensor 13 accordingly Safety sensor 13 is detected and evaluated by the control unit 7, depending on this, the opening drive 1 can be acted on as a function of the control unit 7 as described, namely only if both the crash sensor 8 sends a crash signal and the safety sensor 13 the position “safety OFF ”or" Childproof lock OFF "reports to control unit 7.

If the safety sensor 13 is in the "safety ON" position, the described rotation of the worm wheel 1 in a clockwise direction is not absolute, because the clutch lever 3 maintains its "UNCoupled" position, regardless of whether the crash sensor 8 reports a crash or not. As a result, the motor vehicle door lock remains in its "LOCKED" position.

A flow diagram is now shown in FIG. 2. First, the fuse sensor 13 is queried in the first step. If this is in the "fuse ON" position, the electromechanical opening drive 1 remains unused, ie "1 OFF". If, on the other hand, the fuse sensor 13 assumes the "fuse OFF" position, the sensor 6 is scanned in the area of the inner handle H or handle H, H '. When the sensor 6 is not acted on, this again leads to the opening drive 1 not being acted on “1 from”.

On the other hand, if the sensor 6 assigned to the inner handle H emits a signal to the control unit 7, the crash sensor 8 is queried. If this does not report a signal, an “electrical opening” process follows because the sensor 6 signals an actuation of the handle H, so that the electrical opening drive 1 is then actuated and acted upon with the aid of the control unit 7 (“1 on”) .

As soon as the crash sensor 8 transmits a crash signal “ON” to the control unit 7, this leads to the “security” position that is also assumed OFF ”of the securing unit 6, 7, 8 so that the clutch lever 3 is engaged and the motor vehicle door lock is moved from its previously taken“ LOCKED ”position to the“ UNLOCKED ”position. This functional position can now correspond on the one hand to a mechanical action on the locking mechanism via the inner handle H or alternatively to an electrical opening process in the sense of “1 ON”.

3 and 4, a variant of the motor vehicle door lock according to the invention is shown, in which the additional outer handle H ″ in connection with the additional outer actuating lever chain 3 ″, 4 ″, 5 ″ is realized. In this case too, the single and common electromechanical opening drive 1 not only ensures that the locking mechanism is opened, but the opening drive 1 again ensures - as before - in the event of a crash, that is to say after the crash sensor 8 has been queried, that the clutch lever 3 'there as a component of the outer actuating lever chain 3 ', 4', 5 'is transferred from its commonly assumed position "DISCONNECTED" to the position "INCUPPIED".

For this purpose, starting from the functional position in FIG. 3, the opening drive 1 is first moved in the clockwise direction indicated there. The clockwise movement of the opening drive 1 or its worm wheel 1 leads to the fact that a connecting lever 14 a, b acted upon by a spring is pivoted in the counterclockwise direction. In fact, the connecting lever 14 a, b is a two-part lever, the two components of which are mounted coaxially and have an intermediate spring. The connecting lever 14 a, b bears on the outside of screw edge 1. A spring is assigned to the connecting lever 14 a, b. In the process described, this spring, formed as a center-zero spring, of the connecting lever 14 a, b is tensioned. After completing a certain travel in a clockwise direction, the worm wheel 1 returns to its starting position shown in FIG. 4. This is ensured by a further spring and in particular a center-zero spring, which is assigned to the worm wheel 1 and, after completion of an action by an electric motor (not shown), ensures that the worm wheel 1 is reset in the counterclockwise direction. As a result, the Ver connecting lever 14 a, b can fall into a contour on the worm wheel 1. As a result, the spring associated with the connecting lever 14 a, b is relaxed. The stored energy of the spring of the connecting lever 14 a, b now leads to the locking lever 5 'being pivoted in the counterclockwise direction indicated in FIG. 4, so that the coupling lever 3' as part of the outer confirmation lever chain 3 ', 4', 5 ' is transferred from its disengaged position to the "INHANGED" position. All of this occurs after the query of the crash sensor 8, that is, initiated by the control unit 7 in the event of a crash.

The outer mechanical actuating lever chain 3 ', 4', 5 'is now closed. Subsequently, the fuse sensor 13 is typically queried. If the associated securing unit 6, 7, 8 is in the desired state “ON”, it remains, for example when a child securing unit 6, 7, 8 is implemented as the securing unit 6, 7, 8, that only the outer actuating lever chain 3 ', 4', 5 'is mechanically closed and provides mechanical redundancy. The inner actuating lever chain 3, 4, 5, on the other hand, is still open. In contrast, the “fuse OFF” position in the example considered corresponds to the fact that the inner mechanical lever chain 3, 4, 5 is also closed. This ensures that, for example, in the event of a crash, children inside who are in the "safety ON" or "child safety ON" position cannot open the motor vehicle door from the inside, although emergency personnel are permitted access from the outside. If, on the other hand, the securing unit 6, 7, 8 or, in the example, the child securing unit 6, 7, 8 is in the “OFF” position, the opening drive 1 or the worm wheel 1 performs a second clockwise run, starting from the position in FIG 4. In the course of this further movement of the worm wheel 1, the inner actuating lever chain 3, 4, 5 is then also closed, in which the clutch lever 3 there is moved into its “INHANGED” position. In other words, in the "fuse OFF" position, both mechanical operating lever chains 3, 4, 5 and 3 ', 4', 5 'are closed and there is, as it were, double mechanical redundancy, so that in the event of a crash, the associated motor vehicle door is both locked With the help of the inner handle H as well as with the help of the outer handle H 'can be opened.

Reference numerals

1 opening drive

2 axis

3, 3 'clutch lever

4, 4 'operating lever

5, 5 'locking lever

6, 6 'sensor

7 control unit

8 crash sensor

9 coupling contour

10 nose

11 axis

12 auxiliary levers

13 fuse sensor

14 a, b connecting lever

H, H 'inner handle

Claims

1 . Motor vehicle door lock, with an electromechanical opening drive (1) for a locking mechanism, furthermore with a security unit (6, 7, 8) and with a handle (H, H ') which is queried by a sensor (6) and which is only in the position "fuse OFF “Of the security unit (6, 7, 8) corresponds to an electrical action on the opening drive (1), while in the“ fuse ON ”position of the security unit (6, 7, 8) the opening drive (1) is not acted on, d ad u rc hge indicates that the opening drive (1) is set up solely for the realization of all functional positions and not only works on the locking mechanism for opening, but in particular in the event of a crash also on at least one clutch lever (3, 3 ') with which the handle ( H, H ') can also be mechanically coupled to the locking mechanism.

2. Motor vehicle door lock according to claim 1, characterized in that the clutch lever (3, 3 ') is engaged only in the event of a crash and, if appropriate, in the “fuse OFF” position of the fuse unit (6, 7, 8) and for a mechanically continuous connection for opening of the ratchet.

3. Motor vehicle door lock according to claim 1 or 2, characterized in that the clutch lever (3, 3 ') in the "fuse ON" position of the fuse unit (6, 7, 8) in its disengaged position - regardless of a crash - remains.

4. Motor vehicle door lock according to one of claims 1 to 3, characterized in that the opening drive (1) acts on the lock in one direction of rotation for opening and in the other direction of rotation the clutch lever (3, 3 ') in the event of a crash and in the position " Fuse OFF ”engages.

5. Motor vehicle door lock according to one of claims 1 to 4, characterized in that a control unit (7) is provided which not only the sensor (6) on the handle (H, H '), but also a crash sensor (8) and one Interrogates the safety sensor (13) and controls the opening drive (1) as a function thereof.

6. Motor vehicle door lock according to one of claims 1 to 5, characterized in that the opening drive (1) is equipped with a worm wheel (1).

7. Motor vehicle door lock according to claim 6, characterized in that the worm wheel (1) has an opening contour for the locking mechanism and a coupling contour (10) for the coupling lever (3).

8. Motor vehicle door lock according to one of claims 1 to 7, characterized in that the coupling lever (3, 3 ') between a with the handle (H, H') interacting actuating lever (4) and a locking lever (5) is mounted.

9. Motor vehicle door lock according to claim 8, characterized in that the locking lever (5) interacts with the worm wheel (1) in order to transfer the clutch lever (3, 3 ') from its consistently assumed position "DISCONNECTED" to the "INCLUDED" state.

10. Motor vehicle door lock according to one of claims 1 to 9, characterized in that the security unit (6, 7, 8) is designed as a child security unit (6, 7, 8) and / or anti-theft device.