EP1039080B1 - Central locking system for a motor vehicle - Google Patents

Description

The invention relates to a central locking system for a motor vehicle, with an electronic control unit, further comprising at least one of the control unit electrically controllable motor vehicle door lock with in one Closing element shutter arranged catch and pawl and a means a cover closed lever element shell for receiving at least a central locking lever with central locking drive, and with one or more identification means (s), e.g. B. chip or magnetic card (s), wherein the motor vehicle door lock upon actuation of an associated Outside door handle after verification of identification device and release is opened by the motor control unit, wherein further to the motor Opening of the motor vehicle door lock the central locking drive (via the central locking lever) the pawl to release the Rotary latch indirectly actuated, where further the central locking lever an external operating lever connected to the outside door handle with a release lever for actuating the pawl in its unlocked position couples and disengages in its locked position, and wherein the Central locking lever with the outside door handle activated and released by the Control unit from the locked position to the unlocked position below simultaneous pivoting of the release lever in a releasing the catch Position is transferable.

Regularly several motor vehicle door locks are realized, namely on the side doors, rear doors, on the boot lid and possibly Gas cap. - Basically, the identification device can be a remote control, a chip or magnetic card or the like access control device Act, even a key. At the key can It is a conventional car door key, also beard, for a usual Act lock cylinder.

A central locking system of the design described above is broadly described in EP 0 816 597 A1. Here it goes under Another is to make the unlocking and locking transparent and to perform quickly.

Regardless of this is a central locking system by EP 0 896 118 A1 become known, in which provided on a release lever a partial contour is, which cooperates with a pin or pin of the pawl. These two components act together as an opening aid, which at Reception of an unlocking signal, the pawl in an open position transferred. The chosen geometry requires a relatively strong motor so that thereby the basic advantage of a single drive partially is nullified again.

In addition, one knows a central locking system by DE 195 30 726 A1. In this context, the pawl is on the one hand means a first electrically controllable actuating element and on the other hand by means of an internal operating lever can be lifted. The internal actuating lever acts via a means of a second electrically controllable actuator engageable and disengageable clutch lever in the engaged position of the clutch lever mechanically on the pawl. Accordingly, in principle a so-called servo opening, d. H. an automatic (motor) Triggering the pawl addressed. - In the above teaching comes as an identification device, a remote control is used.

Car locks with the possibility of the aforementioned servo opening are due their extremely fast response and the associated automatism the automatic opening of the pawl ideal for so-called "keyless entry systems", d. H. an access to the car without a key, suitable. Such "keyless entry systems" operate as a vehicle user the identification device carries with him and upon actuation of the Outside door handle a dialogue between the motor vehicle and the associated Control unit and the aforementioned device takes place. Should the vehicle user have the necessary authorization to open the motor vehicle, sends the electronic control unit corresponding signals to the at least one motor vehicle door lock, which motor, as it were automatically, (by means of the adjusting elements according to DE-OS 195 30 726 A1) opened becomes. In any case, such entry or entry procedures require extreme low communication and / or reaction times, which only with motor Opening the motor vehicle door lock or represented by servo opening are.

In general, the known motor vehicle locks have the disadvantage that by dispensing with mechanical redundancy for economic reasons a proper function is given only as long as the electric Vehicle electrical system of the motor vehicle is working properly. Consequently, a Continuous operation ensured only by a redundant wiring system become. This is associated with additional costs. For this reason The known motor vehicle locks have all the necessary mechanical functions on and are additionally equipped with the described servo opening. This entails increased costs and increased weight. Furthermore This also leads to great complexity of the motor vehicle door locks. Here The invention aims to provide a total remedy.

The invention is based on the technical problem of a generic Central locking system so on to form that showing all mechanical functions a servo opening is possible, namely at low cost, low cost and compared to previously known forms reduced weight.

To solve this problem, the invention proposes a central locking system for motor vehicles of the structure described above before that for coupling stored in the lever element shell external actuating lever and release lever one in the central locking lever as well as in the release lever Guided scenery is realized, the external operating lever in the course of Taking the unlocking position of the central locking lever when actuated Outside door handle and release by the control unit for guided pivoting the release lever with the interposition of the scenery serves.

Consequently, the already existing central locking lever (including Central locking drive) indirectly with operated outside door handle the described servo opening. The central locking drive is thus an additional function (in addition to the obligatory locking of all motor vehicle door locks) to, namely the motor, as it were automatic, opening operation of the pawl. Consequently, own engine and associated Gear for the operation of the pawl omitted, wherein instead of the Control of these components by the control unit, the central locking system, d. H. the central locking drive with central locking lever, be controlled.

In addition, the central locking lever takes over as one Clutch function, between the external operating lever and the release lever for actuating the pawl. When the outside door handle is actuated and released through the control unit (after checking the identification device) pivots the central locking lever from the locking position in the Unlocking position with simultaneous pivoting of the release lever in a position releasing the catch. That is, the central locking lever performs - starting from its locking position - a pivoting movement in its unlocked position, and in the event that a legitimate Vehicle user desires access to the motor vehicle.

This will be after verification of the identification device and release by the control unit accomplished in such a way that the control unit in this case the central locking lever via the central locking drive accordingly controls. At the same time, the central locking lever of the Trip lever practically taken, so that he in a releasing the catch Position arrives.

According to a preferred embodiment, the central locking drive has a regularly reversing electric motor with attached worm wheel on. This worm wheel engages in this to rotate a driven pulley one. The aforementioned driven pulley may have at least one eccentric pin, this eccentric pin for pivoting the central locking lever in a corresponding fork recess (in the central locking lever) engages with two-sided stop surfaces. Of course, in usual Make also a pivoting of the central locking lever purely mechanically possible, namely an internal locking lever and a Outside lock lever. This will be with reference to the figure description explained in more detail.

Preferably, the backdrop one between central locking lever and in front view underneath located release lever arranged sheet with pin on. This pin is on the one hand in a slot of the central locking lever, on the other hand in guided a slot of the release lever.

The external operating lever is regularly mounted as rotatable about an axis Two-arm lever with operating lever arm connected to the outside door handle and release lever arm executed. Preferably, the release lever arm is used in the course of taking the unlocking position of the central locking lever for guided pivoting of the release lever, namely with the interposition of the scenery. To do this forms the aforesaid trip lever arm in the locking position of the central locking lever as well as with operated outside door handle and release by the Control unit with an edge a guide for the backdrop or their cones. In this way slides the pin on this, d. H. at the guide, in the course of the operation of the central locking lever (in its unlocked position) along. At the same time, the release lever is in the unlocked position (the catch) pivots.

As a result, in the context of the invention, the central locking or the central locking drive together with the central locking lever as it were used for an additional function, namely the servo opening of the respective motor vehicle door lock on the side doors, rear doors, boot lids, Tank flap, etc. This is possible with simple Construction and low weight, because an additional drive with gearbox for servo opening - as in DE-OS 195 30 726 is described - expressly not required. Looking at the EP 0 896 118 can be with a weaker and thus lighter and cheaper drive be worked because of the pin described the backdrop a relatively long way along the edge of the Tripping lever arm covers. Moreover, by the described embodiment - in contrast to the pre-published European teaching - a defined and flawless guidance of the scenery ensures, being Tilting, malfunctions, etc. are excluded can.

Anyway, not only benefits in terms of the Function but also with regard to the production and Claim manufacturing costs, because not only additional aggregates are eliminated and the required Drives are designed inexpensively, but about it In addition, the assembly, installation and maintenance are simplified.

The verification of the identification device by the Control unit may be done so that the control unit with the respective electrically controllable motor vehicle door lock for each motor vehicle door via electrical Control lines connected as a serial initiation bus can be executed. Here are the over sent this bus serial control signals from the Control unit in appropriate control currents for the central locking drive transformed. To this end can be a multiplexer in the control unit as well as a demultiplexer with control and driver circuitry in each motor vehicle door lock be provided, as is fundamentally in the already mentioned German Offenlegungsschrift 195 30 726 is described.

To check the identification device is a Matching between identity codewords stored in the control unit and from the identification device transmitted identity code words to be queried, as described in detail in the document in question is. Reference is expressly made to this. This sets an active identification device in the sense a remote control ahead. - Of course, this can Identification device should also be passive, as in principle in German Patent 197 01 077 is described. Also so-called magnetic or chip card reading systems are conceivable at this point.

Fig. 1

eine schematische Gesamtansicht einer erfindungs- gemäßen Zentralverriegelungsanlage,

Fig. 2

eine Schließelementschale mit Drehfalle und Sperr- klinke,

Fig. 3 bis 5

die in Frontansicht über der Schließelement- schale nach Fig. 2 angeordnete Hebelelementschale mit integrierter Zentralverriegelung in verschie- denen Funktionsstellungen und

Fig. 6

einen Schnitt durch die Fig. 3 entlang der Linie A-A.

In the following the invention will be explained in more detail with reference to a drawing showing only one embodiment. Show it:

Fig. 1

a schematic overall view of a central locking system according to the invention,

Fig. 2

a closing element shell with catch and locking pawl,

Fig. 3 to 5

arranged in front view on the closing element shell of FIG. 2 lever element shell with integrated central locking in various functional positions and

Fig. 6

a section through the Fig. 3 along the line AA.

In the figures, a central locking system for a Motor vehicle shown. This is according to the schematic Representation in Fig. 1 with an electronic Control unit 1 and electrically controlled by the control unit 1 Motor vehicle door locks 2 equipped. According to the embodiment, four vehicle door locks 2 for each motor vehicle door of a four-door Motor vehicle shown. The connection of the electronic Control unit 1 with the motor vehicle door locks 2 via electrical control lines 3 for Control of the motor vehicle door locks 2 by means of Control unit 1. Here are the electrical control lines 3 executed as a serial introduction bus 3, wherein each motor vehicle door closure 2 at least one Control and driver circuit 4 for controlling the central locking drive 5 has. Of course can also other units in the motor vehicle door lock 2 acted upon by the respective control and drive circuit 4 become. Finally, in the schematic view to recognize an identification device 6, which with the help of the control unit 1 on authorization of User is checked. In this identification device 6 may be a remote control, a Chip or magnetic card or the like access control device act. Of course, in principle, too a key conceivable.

As shown in FIG. 2, each motor vehicle door lock 2 a catch 7 and an associated pawl 8 on. Rotary latch 7 and pawl 8 are in one Closing element shell 9 is arranged. This closing element shell 9 is a front view below the in Fig. 3rd arranged to 5 illustrated lever element shell 10. The Lever element shell 10 is shown in FIG. 6 means a lid 11 closed. On this lid 11 are a Inner lock lever 12 and an inner operation lever 13 stored.

To the basic structure belongs according to the Fig. 3rd to 5 further a central locking lever 14, which with the central locking drive 5 cooperates. This Central locking drive 5 consists of a reversing Electric motor 5a with connected motor shaft 5b and worm wheel 5c together and is in the upper part of Closing element shell 10 is arranged. A rotation of the Motor shaft 5b is reversible via the worm wheel 5c in Rotational movements of a driven wheel 15 converted. This is indicated by a double arrow. The driven pulley 15 is in the embodiment with two eccentric pins 16 equipped. The eccentric pins 16 engage Pivoting of the central locking lever 14 in a corresponding fork recess 17 with stop surfaces on both sides 18 one. In Fig. 3 is pulled through the position of the central locking lever 14 in the unlocked position shown. In this position beats an eccentric pin 16 at the associated (right) stop surface 18, whereby the driven pulley 15 and thus the electric motor 5a are stopped, as is well known in the and Prior art has already been described.

The locking position of the central locking lever shown in Fig. 4 14 is by means of the central locking drive 5 so taken that - starting from the Unlocking position - the driven pulley 15 against the Clockwise is rotated so that the left in Fig. 3 Eccentric pin 16 engages in the fork recess 17 and the central locking lever 14 is pivoted clockwise. This happens until the right in Fig. 3 Eccentric pin 16 abuts the left stop surface 18 and thus stops the electric motor 5a.

In addition to the above-described transfer of the central locking lever 14 in the different positions is also a pivoting by means of the inside locking lever 12 and an outer locking lever 19 possible. To For this purpose, for example, engages the outer locking lever 19 with a nose 20 in a pivoting opening 21 of the Central locking lever 14 a.

In addition, Figs. 3 to 5 leave an external operating lever 22 recognize which with a not shown Door outside handle cooperates. At the outside operating lever 22 is a two-arm lever with the outside door handle connected Betätigungshebelarm 22a and trip lever arm 22b. Anyhow, an operation leads the outside door handle to a pivoting of the external actuating lever 22 about its axis 23, in the direction of the arrow. Finally, one of the basic structure Release lever 24 which is pivotally mounted about an axis 25 is and with a nose 26 a boom 27 of (in Front view located underneath) pawl 8 to the Opening actuated (see also Fig. 2). The axis 25, the (Rotary) axis 23 and an axis 28 for the central locking lever 14, the catch 7 and the above the Central locking lever 14 arranged outer locking lever 19 are each arranged parallel to each other. This also applies to the axis of the driven pulley 15th

For coupling of external operating lever 22 and release lever 24 is one by means of the central locking lever 14 and the trigger lever 24 guided gate 29, 30 is provided. The backdrop 29, 30 has a between central locking lever 14 and in front view underneath the release lever 24 arranged sheet 29th with the sheet 29 on both sides penetrating pin 30. The pin 30 is on the one hand in a slot 31 of the central locking lever 14, on the other hand in a slot 32 of the trigger lever 24 out.

The operation is as follows: The one shown Motor vehicle door closure 2 can be actuated by a associated outside door handle after checking the identification device 6 and released by the control unit. 1 open motor. To this motorized opening of the motor vehicle door lock 2 actuates the central locking drive 5 via the central locking lever 14 the Pawl 8 to release the catch 7 indirectly. In detail, the central locking lever engages 14 associated with the outside door handle external operating lever 22 with the release lever 24 in its unlocked position (see Fig. 3). A decoupling takes place in the locking position of the central locking lever 14th (see Fig. 4). When the outside door handle is actuated and released by the control unit 1, the central locking lever 14 - starting from the locking position in Fig. 4 - in the unlocked position as shown in FIG Fig. 5 transferred. This is done with simultaneous pivoting of the trigger lever 24 in a rotary latch. 7 releasing position.

The catch 7 is in the usual way by the pawl 8 held in its closed position. Then the motor vehicle door lock and the associated motor vehicle door closed. To the motor vehicle door lock or To open the door, the pawl 8 must be pivoted so be that the catch 7 (spring assisted) rotate can and thus a closing piston, not shown releases. The pivoting of the pawl 8 is carried out by the release lever 24, which in turn by the Internal operating lever 13 or by the external operating lever 22 via the gate 29, 30 acted upon becomes.

If the external operating lever 22 is actuated in the direction of the arrow, Thus, the backdrop 29, 30 of their in Fig. 3 shown Position A in position B (dot-dashed) transferred, and in befindlichem in unlocked position Central locking lever 14. At the same time is the Release lever 24 counterclockwise about its axis of rotation 25 pivots and thereby pushes the nose 26th on the boom 27 of the pawl 8, so that the catch 7 is released.

When the central locking lever 14 in its locking position (see Fig. 4) by means of the driven pulley 15th is transferred, there is a pivoting of the central locking lever 14 about the axis 28 in a clockwise direction. At the same time the slot 31 moves in the in Fig. 4 shown position. In addition, the scenery moves 29, 30 to position C. In this position, the Gate 29, 30 by the external operating lever 22 is not be moved because the Betätigungshebelarm 22b of the External actuating lever 22, the pin 30 no longer detect can. Consequently, the motor vehicle door lock 2 can be in Locking position of the central locking lever 14 do not open anymore as this is reasonable and also desired is.

The servo opening with actuated external operating lever 22 and release by the controller 1 is performed as follows. The scenery 29, 30 is located in the position C. (see Fig. 4) and the external operating lever 22 is in the shown pivoted position about the axis of rotation 23 in a clockwise direction Service. As a result, takes an edge 33 on the Betätigungshebelarm 22, the position shown in Fig. 5 a. These Edge 33 forms a guide for the gate 29, 30 and the pin 30th

In any case, the pin 30 and thus the slide 29 slides, 30 along the edge 33 as soon as the central locking lever 14 is actuated (transition into the unlocked position), and that triggered by the release of the Control unit 1, which the central locking drive. 5 acted upon accordingly. At the same time the release lever 24 pivots, in the counterclockwise direction about the axis 25. At the end of the movement of the central locking lever 14 is the backdrop 29, 30 back in the position B, which to the open position of the release lever 24 corresponds (see Fig. 3). Simultaneously with the pivoting the release lever 24 counterclockwise is through its nose 26 in conjunction with the boom 27th triggered the pawl 8 and thus the catch 7 released. Consequently, the release lever arm 22 serves in the course of Taking the unlocking position of the central locking lever 14 for pivoting the release lever 24 under Interposition of the scenery 29, 30.

Claims (5)

1. A central locking facility for a vehicle, with

   an electronic control unit (1),

   at least one vehicle lock (2) electrically controlled by the control unit (1) with a revolving latch (7) and detent pawl (8) arranged in a locking element shell (9), as well as a lever element shell (10) locked by means of a cover (11) for taking up at least one central locking lever (14) with central locking drive (5), and with

   an identification device (6),

   whereby the vehicle lock (2) is opened by motor on actuation of an assigned external door handle after checking the identification device (8) and release by the control unit (1),
   whereby further to motorised opening of the vehicle door lock (2) the central locking drive (5) indirectly activates the detent pawl (8) to release the revolving latch (7),
   whereby further the central locking lever (14) couples an external actuation lever (22) connected to the external door handle with a release lever (24) to activate the detent pawl (8) in its unlocked position and uncouples it in its locked position, and
   whereby the central locking lever (14) the revolving latch (7) can be transferred from the locking position into the unlocking position with simultaneous pivoting of the release lever (24) into a position releasing when the external door handle is actuated and released by the control device (1),
   characterised in that

   a crank (29, 30) guided in the central locking lever (14) and in the release lever (24) is realised to couple an external actuation lever (22) mounted in the lever element shell (10) and a release lever (24), whereby

   the external actuation lever (22) acts as guided pivoting of the release lever (24) by interposing the crank (29, 30) while the unlocked position of the central locking lever (14) is assumed by actuating the external door handle and release by the control device (1).
2. The central locking facility as claimed in Claim 1, characterised in that the central locking drive (5) has an electromotor (5a) with attached worm wheel (5c) for rotating a driven disc (15) with at least one eccentric pin (18), whereby the eccentric pin (16) engages in a corresponding fork recess (17) with stop faces (18) on both sides to pivot the central locking lever (14).
3. The central locking facility as claimed in Claim 1 or 2, characterised in that the crank (29, 30) has a leaf (29) with trunnion (30) arranged between the central locking lever (14) and the release lever (24) located under the latter in frontal view, whereby the trunnion (30) is on the one hand guided in a longitudinal hole (31) of the central locking lever (14), and on the other hand in a longitudinal hole (32) of the release lever (24).
4. The central locking facility as claimed in any one of Claims 1 to 3, characterised in that the external actuation lever (22) is designed as a two-arm lever swivel-mounted about an axis (23) with an actuation lever arm (22a) and release lever arm (22b) attached to the external door handle.
5. The central locking facility as claimed in Claim 4, characterised in that the release lever arm (22b) forms a guide for the crank (29, 30) or the trunnion (30) while the unlocked position of the central locking lever (14) is assumed in the locked position of the central locking lever (14) with an edge (33), which glides along during actuation of the central locking lever (14) with simultaneous pivoting of the release lever (24) into the open position.

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