EP4278054A1 - Kraftfahrzeug-schloss - Google Patents
Kraftfahrzeug-schlossInfo
- Publication number
- EP4278054A1 EP4278054A1 EP21827593.1A EP21827593A EP4278054A1 EP 4278054 A1 EP4278054 A1 EP 4278054A1 EP 21827593 A EP21827593 A EP 21827593A EP 4278054 A1 EP4278054 A1 EP 4278054A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lock
- emergency
- motor vehicle
- control unit
- energy source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/54—Electrical circuits
- E05B81/80—Electrical circuits characterised by the power supply; Emergency power operation
- E05B81/82—Electrical circuits characterised by the power supply; Emergency power operation using batteries other than the vehicle main battery
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0097—Operating or controlling locks or other fastening devices by electric or magnetic means including means for monitoring voltage, e.g. for indicating low battery state
Definitions
- the invention relates to a motor vehicle lock, in particular a motor vehicle door lock, with a locking mechanism arranged in a lock housing and essentially consisting of a rotary latch and pawl, and also having an electric motor drive, in particular for the locking mechanism, and an emergency energy source for the electrical emergency supply of the drive.
- Electric motor drives in particular for the locking mechanism. This significantly increases comfort.
- the electric motor drive in question can also be used to implement functional positions such as locking positions, a child safety function, an anti-theft function, etc.
- the electric motor drive is used to open the locking mechanism electrically.
- Such an electrical opening process is not only particularly convenient because a mechanical action on the part of an operator can be omitted for this purpose, the operator rather, for example, acts on a switch, a door handle, a remote control, etc. to open the locking mechanism electrically.
- the electrical opening can also contribute to improving the aerodynamics of an associated motor vehicle because, among other things, this means that outside door handles can be omitted.
- electromotive drives for the locking mechanism can also be used to ensure the locking mechanism is pulled shut as a closing drive, as is described, for example, in the generic prior art according to DE 10 2018 123 264 A1.
- the emergency energy source ensures that the electromotive drive is activated via the emergency energy source.
- This is the well-known motor vehicle lock in the Can be opened in a structurally simple manner in the event of an accident or crash.
- a comparable motor vehicle lock is the subject of US Pat. No. 10,378,251 B2. In this case, too, it is a question of being able to control any disruptions in the energy supply of the electric motor drive in the event of an accident or a crash.
- One conceivable solution is to provide a mechanical backup solution.
- mechanical backup solutions are structurally complex and increase the weight of the motor vehicle lock.
- both an increase in weight and an increase in price are practically no longer accepted today.
- the known teaching according to US Pat. No. 10,378,251 B2 works with an emergency energy source for the electrical emergency supply of the drive.
- the emergency energy source is one that uses, among other things, so-called supercaps, ie capacitors with a particularly high capacity, which are charged by the energy source that is obligatory on the body side.
- an additional charging module is provided and additionally a so-called boost module in order to be able to provide the electrical voltage in the range of 9 V to 16 V typically required to operate the electric motor drive on the output side of the capacitor.
- the emergency energy source is inside the lock housing.
- an additional control unit on the lock side in the lock housing ensures that the system switches to the emergency power source in an emergency. This has basically worked.
- the invention is based on the technical problem of further developing such a motor vehicle lock and in particular a motor vehicle door lock in such a way that, while the emergency energy source continues to function properly, the design and monetary outlay is reduced once again compared to the prior art.
- the invention proposes, in a generic motor vehicle lock and in particular a motor vehicle door lock, that the emergency energy source be arranged in the lock housing so that it can be replaced.
- the invention is therefore initially based on the assumption that the emergency energy source can be exchangeably accommodated in the lock housing. Ie, as a result there is the further possibility of being able to fall back on a conventional emergency energy source.
- a further advantage is that the emergency energy source can be designed to be self-sufficient in this way from the body-side energy source. That is, the exchangeability of the emergency energy source in the interior of the lock housing provided according to the invention opens up the possibility of being able to dispense with an electrical connection to the energy supply on the body, so that the emergency energy source can be designed to be self-sufficient and independent of the energy supply on the body in question.
- the invention is based on the finding that such emergency energy sources in the form of non-rechargeable lithium batteries, for example, are available nowadays in large numbers, inexpensively and without any problems.
- non-rechargeable inorganic lithium batteries deliver, for example, an output voltage of 3.6 V, so that three such batteries connected in series already generate a voltage of 10.8 V.
- Four such batteries even provide an output voltage of 14.4 V, so that in connection with the typically required current of several amperes, the electromotive drive can be controlled in emergency operation without any problems and, for example, still and unchanged ensures the electrical opening of the locking mechanism can.
- the exchangeable emergency energy source arranged in the lock housing can also be exchanged and renewed by non-professionals if necessary.
- the design is usually made in such a way that the exchangeable emergency energy source is accessible via a lock mouth of the lock housing.
- the lock mouth in question is typically used to enable a lock holder on the body to interact with the locking mechanism inside the motor vehicle lock. Since the motor vehicle lock and in particular the motor vehicle door lock is generally fitted inside an associated motor vehicle door, the lock mouth in question is basically accessible at least when the relevant motor vehicle door is in the open state.
- a lock-side control unit is also provided in the lock housing. Attaching the lock-side control unit in the lock housing has the advantage that the lock-side control unit is attached in a protected manner and is not damaged, particularly in the event of a crash. As a result, the lock-side control unit in the lock housing can control the essential lock functions even after a crash and, in particular, ensure that the electric motor drive can continue to be supplied with current and unchanged using the emergency energy source. In addition, with the aid of the lock-side control unit in the lock housing, the emergency power source that is also replaceable in the lock housing can be checked.
- the lock-side control unit can regularly check the voltage provided by the emergency energy source and also its state of charge. As soon as the voltage or the state of charge of the non-rechargeable emergency energy source has fallen below a certain threshold within the scope of the invention, the lock-side control unit can, for example, send a corresponding warning message to an additionally provided body-side control unit or the motor vehicle in general, with the help of which the operator or user attention is drawn to the fact that the emergency power source needs to be replaced.
- the control unit on the lock side generally communicates with the previously mentioned control unit on the body side.
- the communication is generally wired.
- a bus connection has proven to be particularly cheap here.
- it can be a so-called LIN bus (Local Interconnected Network), ie a serial communication system, with the help of which sensors and actuators in the interior of the motor vehicle are generally networked with one another.
- the data can be transmitted as a PWM signal (pulse width modulated).
- PWM signal pulse width modulated
- the lock-side control unit communicates with the body-side control unit, specifically advantageously via the addressee bus connection. This allows the body-side control unit to transmit an emergency signal to the lock-side control unit in an emergency.
- communication between the lock-side control unit and the body-side control unit is normally possible and provided for.
- the emergency signal in question is sent via the bus connection from the body-side control unit to the lock-side control unit. This is usually done serially and, for example, as a PWM signal.
- the emergency signal usually corresponds to a voltage drop/voltage failure of the energy supply on the body side. That is, as soon as the body-side control unit detects a significant voltage drop or even a complete voltage failure of the body-side power supply, the relevant emergency signal is generated and, according to the invention, transmitted to the lock-side control unit.
- an emergency signal typically triggers additional measures and scenarios, such as checking a crash sensor, triggering belt tensioners, airbags, etc. if necessary.
- the design is advantageously such that the lock-side control unit switches at least its energy supply and that of the electromotive drive to the emergency energy source when it receives the emergency signal.
- the control unit on the lock side together with the electric motor drive, is designed to be completely independent of the energy supply on the body side when the emergency signal is received. In most cases, the receipt of the emergency signal by the control unit on the lock side also ensures that an emergency sensor is monitored if necessary.
- This emergency sensor can be an additional sensor that is attached outside or inside in or on the relevant motor vehicle door.
- the emergency sensor in question is usually designed as an emergency switch.
- the emergency sensor in question may be specially labeled to emphasize its importance. The fact that the control unit on the lock side only monitors the emergency sensor in question when the emergency signal is received ensures that any actuations of the emergency sensor outside of emergency operation are ignored by the control unit on the lock side. only in Emergency operation and after receiving the emergency signal, operations of the emergency sensor are registered and implemented by the lock-side control unit.
- an actuation of the emergency sensor in question in emergency operation by the lock-side control unit can be interpreted directly to the effect that an electrical emergency opening is desired in the example case.
- the emergency energy source is available, which in the emergency operation in question ensures that the electric motor drive is nevertheless supplied with the necessary electrical energy for its application, regardless of the energy supply on the body.
- the electromotive drive can open the locking mechanism in question electrically in an emergency.
- other emergency operations are also possible and conceivable with the help of the electric motor drive.
- the design is such that in an emergency, the control unit on the lock side switches to the emergency energy source and monitors the emergency sensor.
- the lock-side control unit can also switch the energy supply of the entire motor vehicle lock to the emergency energy source.
- emergency actuations of the emergency sensor can be detected immediately with the aid of the lock-side control unit and, for example, converted into the desired electrical emergency opening.
- Fig. 1 the motor vehicle lock according to the invention in a schematic overview
- the motor vehicle lock is a motor vehicle door lock which, according to the exemplary embodiment, is arranged inside a motor vehicle door 1 that is only indicated.
- the motor vehicle door 1 is a motor vehicle side door, specifically a motor vehicle driver's door.
- the motor vehicle door 1 can also be a motor vehicle flap, a motor vehicle tailgate, a motor vehicle tank flap, etc. That is, the term motor vehicle door 1 is to be interpreted broadly within the scope of the present application.
- the basic structure of the motor vehicle lock or motor vehicle door lock as shown has a locking mechanism 3, 4 arranged in a lock housing 2.
- the locking mechanism 3, 4 consists of a rotary latch 3 and a pawl 4 as usual.
- a closed state of the locking mechanism 3, 4 is shown with the catch 3 having fallen into the pawl 4.
- the basic structure of the motor vehicle lock also includes an electric motor drive 5 which, according to the exemplary embodiment, acts on the pawl 4 and can lift it out of its engagement with the rotary latch 3 . Consequently, the electric motor drive 5 is designed as an electric motor opening drive for the locking mechanism 3, 4 within the scope of the exemplary embodiment and not restrictively.
- the electromotive drive 5 is controlled by a control unit 6 on the lock side.
- the lock-side control unit 6, like the locking mechanism 3, 4 and the electric motor drive 5, are located inside the lock housing 2.
- This also applies to an emergency energy source 7 that is additionally provided, with the help of which the electric motor drive 5 can be acted upon for electrical emergency supply.
- the emergency energy source 7 is also arranged and placed inside the lock housing 2 .
- the emergency energy source 7 is arranged in the lock housing 2 so that it can be replaced.
- the emergency energy source 7 in question is accessible via a lock mouth 8 according to the exemplary embodiment and as shown in FIG.
- the lock mouth 8 can be seen particularly in FIG. 2.
- the rotary latch 3 dips at least partially into the lock mouth 8 in order to be able to interact with a lock holder (not shown) and located on the body of the motor vehicle when the motor vehicle door 1 is closed.
- a lock holder (not shown) and located on the body of the motor vehicle when the motor vehicle door 1 is closed.
- the lock holder in question moves into the lock mouth 8 .
- Said lock mouth 8 is also freely accessible as soon as the motor vehicle door 1 is open. This makes it possible to place an insert E in the lock mouth 8 that accommodates the emergency energy source 7 in an exchangeable manner and can be plugged into the lock housing 2 in an exchangeable manner. At the same time, the insert E ensures that the lock housing 2 is closed.
- an openable flap can also be provided and implemented in the lock housing 2 in the area of the lock mouth 8, when the emergency energy source 7 becomes accessible when it is opened.
- This flap K is indicated in FIGS. Either way, the emergency energy source 7 can easily be replaced by a layman if necessary, which only requires the motor vehicle door 1 to be in the open state.
- the emergency energy source 7 is one that is designed to be self-sufficient in comparison to an energy supply 9 on the body.
- the emergency energy source 7 is not only designed to be self-sufficient or independent of the energy supply 9 on the body, but is also not designed to be rechargeable.
- one or more non-rechargeable, commercially available lithium batteries have proven to be particularly favorable as an emergency energy source 7 .
- These can even be present and designed in the form of button cells, which are inserted into the replaceable insert E or into a holder that is accessible when opening the alternatively provided flap K in the area of the lock mouth 8 .
- the lock-side control unit 6 communicates with a body-side control unit 10.
- a bus connection 11 is provided for this purpose.
- the bus binding 1 1 it can be the LIN bus already mentioned in the introduction.
- the body-side control unit 10 outputs an emergency signal to the lock-side control unit 6 .
- the emergency signal usually corresponds to a voltage drop/voltage failure of the body-side power supply 9.
- the lock-side control unit 6 switches its energy supply and that of the electric motor drive 5 to the emergency energy source 7 .
- the lock-side control unit 6 and the electric motor drive 5 are supplied with the necessary electrical energy with the aid of the body-side energy supply 9 .
- the emergency signal has been transmitted by the body-side control unit 10 to the lock-side control unit 6, the power supply is switched, namely from the body-side power supply 9 to the emergency power source 7.
- the emergency power source 7 may be responsible for the entire electrical power supply of the motor vehicle -Castle, i.e.
- the lock-side control unit 6 automatically switches over to the emergency energy source 7 in the event of an emergency or when the emergency signal is received by the body-side control unit 10 .
- the design is such that in the said emergency or when the emergency signal is received, the control unit 6 on the lock side also monitors an emergency sensor 12 .
- This emergency sensor 12 can be provided on the inside of the motor vehicle door 1, on the outside of the motor vehicle door 1 or at another location. Since the emergency sensor 12 in question is monitored only and exclusively after the lock-side control unit 6 has received the emergency signal, any impingements on the emergency sensor 12 are ignored during normal operation. Only in the event of an emergency and after the emergency signal has been received does an actuation of the emergency sensor 12 lead to the locking mechanism 3, 4 being electrically opened in an emergency.
- the control unit 6 on the lock side interprets an application of the relevant emergency sensor 12 to the effect that the desired emergency opening of the locking mechanism 3, 4 is to be carried out.
- the emergency opening can be accompanied by a change in the direction of rotation of the electric motor drive 5 .
- this is not mandatory.
Landscapes
- Lock And Its Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021100739.9A DE102021100739A1 (de) | 2021-01-15 | 2021-01-15 | Kraftfahrzeug-Schloss |
| PCT/DE2021/100991 WO2022152343A1 (de) | 2021-01-15 | 2021-12-10 | Kraftfahrzeug-schloss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4278054A1 true EP4278054A1 (de) | 2023-11-22 |
| EP4278054B1 EP4278054B1 (de) | 2024-10-09 |
Family
ID=78957899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21827593.1A Active EP4278054B1 (de) | 2021-01-15 | 2021-12-10 | Kraftfahrzeug-schloss |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12421771B2 (de) |
| EP (1) | EP4278054B1 (de) |
| KR (1) | KR20230131256A (de) |
| CN (1) | CN116783360A (de) |
| DE (1) | DE102021100739A1 (de) |
| WO (1) | WO2022152343A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023121579A1 (de) | 2023-08-11 | 2025-02-13 | Kiekert Aktiengesellschaft | Kraftfahrzeug-Schloss |
| DE102024104085A1 (de) * | 2024-02-14 | 2025-08-14 | Kiekert Aktiengesellschaft | Kraftfahrzeug-Schließeinrichtung |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2723126B1 (fr) | 1994-07-27 | 1996-09-27 | Ymos France Sa | Ensemble constitue d'une serrure electrique de portiere ayant une fonction secours electrique et de ses moyens de commande et d'alimentation |
| FR2775718B1 (fr) * | 1998-03-06 | 2000-05-05 | Valeo Systemes De Fermetures | Serrure a commande electrique pour portiere de vehicule comportant une pile de secours |
| JP2000064685A (ja) * | 1998-08-26 | 2000-02-29 | Denso Corp | ドアロック操作装置 |
| GB0319030D0 (en) * | 2003-08-13 | 2003-09-17 | Arvinmeritor Light Vehicle Sys | Latch mechanism |
| DE102005054111A1 (de) * | 2005-11-12 | 2007-05-16 | Marquardt Gmbh | Schließsystem, insbesondere für ein Kraftfahrzeug |
| US9013056B2 (en) * | 2012-02-22 | 2015-04-21 | Panasonic Intellectual Property Management Co., Ltd. | Backup power source device and automobile equipped with same |
| DE112013006196T5 (de) | 2012-12-24 | 2015-09-10 | Magna Closures Inc. | Unfallmanagementsystem und Verfahren in einem elektronischen Schloss einer Kraftfahrzeug-Schließvorrichtung |
| US9416565B2 (en) * | 2013-11-21 | 2016-08-16 | Ford Global Technologies, Llc | Piezo based energy harvesting for e-latch systems |
| US9834964B2 (en) * | 2014-05-13 | 2017-12-05 | Ford Global Technologies, Llc | Powered vehicle door latch and exterior handle with sensor |
| US20160130843A1 (en) * | 2014-11-12 | 2016-05-12 | Adac Plastics, Inc. | Low voltage backup assembly for electronic latch |
| DE102015205345A1 (de) * | 2015-03-24 | 2016-09-29 | Kiekert Ag | Betätigungseinrichtung für ein Kraftfahrzeugelektroschloss mit Federspeicher |
| DE102016010244A1 (de) | 2015-08-31 | 2017-03-02 | Marquardt Gmbh | Schließelement, insbesondere für ein Kraftfahrzeug |
| US10683684B2 (en) * | 2016-04-29 | 2020-06-16 | Magna Closures Inc. | Motor vehicle closure system with electronic latch and handle having two-pin handle switch |
| DE102017212624A1 (de) * | 2016-08-09 | 2018-02-15 | Magna Closures Inc. | Elektrische Türverriegelung mit Motorrückstellung |
| US11035157B2 (en) * | 2017-05-25 | 2021-06-15 | Magna Closures Inc. | Closure latch for vehicle door having bidirectional power release function |
| DE102018123264A1 (de) | 2018-09-21 | 2020-03-26 | Daimler Ag | Verfahren zur steuerung eines kraftfahrzeugschlosses |
| US11959315B2 (en) * | 2019-05-23 | 2024-04-16 | Magna Closures Inc. | Latch assembly with hybrid backup energy source |
-
2021
- 2021-01-15 DE DE102021100739.9A patent/DE102021100739A1/de active Pending
- 2021-12-10 CN CN202180090153.8A patent/CN116783360A/zh active Pending
- 2021-12-10 EP EP21827593.1A patent/EP4278054B1/de active Active
- 2021-12-10 US US18/258,342 patent/US12421771B2/en active Active
- 2021-12-10 WO PCT/DE2021/100991 patent/WO2022152343A1/de not_active Ceased
- 2021-12-10 KR KR1020237027550A patent/KR20230131256A/ko active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022152343A1 (de) | 2022-07-21 |
| DE102021100739A1 (de) | 2022-07-21 |
| US20240035315A1 (en) | 2024-02-01 |
| CN116783360A (zh) | 2023-09-19 |
| EP4278054B1 (de) | 2024-10-09 |
| US12421771B2 (en) | 2025-09-23 |
| KR20230131256A (ko) | 2023-09-12 |
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