GB2287750A - Securing system for a motor vehicle - Google Patents

Securing system for a motor vehicle Download PDF

Info

Publication number
GB2287750A
GB2287750A GB9505440A GB9505440A GB2287750A GB 2287750 A GB2287750 A GB 2287750A GB 9505440 A GB9505440 A GB 9505440A GB 9505440 A GB9505440 A GB 9505440A GB 2287750 A GB2287750 A GB 2287750A
Authority
GB
United Kingdom
Prior art keywords
control line
control
locking
securing system
motor vehicle
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
Application number
GB9505440A
Other versions
GB2287750B (en
GB9505440D0 (en
Inventor
Maximilian Loeffler
Hans-Juergen Nussbaum
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Ford Werke GmbH
Original Assignee
Siemens AG
Ford Werke GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG, Ford Werke GmbH filed Critical Siemens AG
Publication of GB9505440D0 publication Critical patent/GB9505440D0/en
Publication of GB2287750A publication Critical patent/GB2287750A/en
Application granted granted Critical
Publication of GB2287750B publication Critical patent/GB2287750B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B77/00—Vehicle locks characterised by special functions or purposes
    • E05B77/46—Locking several wings simultaneously
    • E05B77/48—Locking several wings simultaneously by electrical means
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B77/00—Vehicle locks characterised by special functions or purposes
    • E05B77/22—Functions related to actuation of locks from the passenger compartment of the vehicle
    • E05B77/24—Functions related to actuation of locks from the passenger compartment of the vehicle preventing use of an inner door handle, sill button, lock knob or the like
    • E05B77/28—Functions related to actuation of locks from the passenger compartment of the vehicle preventing use of an inner door handle, sill button, lock knob or the like for anti-theft purposes, e.g. double-locking or super-locking
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B77/00—Vehicle locks characterised by special functions or purposes
    • E05B77/02—Vehicle locks characterised by special functions or purposes for accident situations
    • E05B77/12—Automatic locking or unlocking at the moment of collision
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/02—Power-actuated vehicle locks characterised by the type of actuators used
    • E05B81/04—Electrical
    • E05B81/06—Electrical using rotary motors

Landscapes

  • Lock And Its Accessories (AREA)

Abstract

The control unit (1) has a first control conduit (4) for locking a lock (2) and a second control conduit (5) for unlocking the lock. The control conduits are connected to a positioning device (3) which moves a bolt of the lock into a locking and an unlocking position. A monitor unit (6) is connected with the first control conduit and the control unit, whereby the monitor unit ascertains the voltage level on the first control conduit, feeding it to the control unit. The control unit compares the voltage level with a theoretical value and emits a signal for unlocking the lock to the positioning device, as soon as the voltage level deviates from the theoretical value.

Description

2287750 -I- SECURING SYSTEM FOR A MOTOR VEHICLE The invention relates to a
securing system for a motor vehicle, in particular a central locking arrangement.
Such securing systems are well known. All the doors of a motor vehicle can be locked or unlocked together using a key, or by remote control. The motor vehicle may be locked in this way when parked, as a protection against thieves. In order to prevent theft of the vehicle by smashing the window panes and opening the doors from the inside, it is known to engage a socalled double-lock. The vehicle doors are then 'doubly' locked and without a key can no longer be opened, either from the outside, or from the inside.
is However, a short-circuit of the "double-lock,' control line to a voltage or to the frame of the car occurring as a result of an accident can enable doublelocking unintentionally.
It is desirable that the securing system is arranged so that it is not possible to engage the double-lock unintentionally so that if the vehicle is badly damaged as the result of an accident, for example, it remains possible to open the vehicle doors from the inside or outside. The present invention seeks to provide a securing system in which unintentional engagement of double-locking as a result of external circumstances is prevented.
According to the present invention there is provided a securing system for a motor vehicle, having a locking means for locking and unlocking a motor vehicle lock and a control means comprising a first control line for controlling the locking of the locking means and a second control line for controlling the unlocking of the locking means wherein the control means compares the signal level of the first control line with a desired value, and controls the signal level of the second control line to unlock the locking means when the signal level of the first control line deviates from the desired value.
Advantageous developments of the invention are set 5 out in the subclaims.
For a better understanding of the present invention, and to show how it may be brought into effect, reference will now be made, by way of example, to the accompanying drawing showing a block circuit diagram of a securing system according to the invention.
The securing system shown in the accompanying drawing has a control unit 1, which controls the locking or unlocking of door locks 2 of a motor vehicle. The locking bars of the door locks 2 are moved by an adjusting device 3. This adjusting device 3 is connected to the control unit 1 via control lines 4 and 5. In order to produce the so-called double-lock (with double-locking, the vehicle doors can no longer be opened from the inside), two control lines 4 and 5 are provided. A first control line 4 is provided for the transmission of a signal for securing or locking the door lock 2 and a second control line 5 is provided for the transmission of a signal for unlocking the lock 2.
When double-locking is disabled, i.e. as is generally the case when people are in the vehicle and the ignition is switched on, a short- circuit (represented in the Figure by a danger arrow) occurring as the result of an accident, for example, may cause the first control line 4, to receive a voltage level such that it causes the adjusting device 3 to lock the door lock 2 and double-locking is engaged.
In accordance with the invention, however, the unintentional engaging of double-locking is avoided by providing a monitoring unit 6 which detects the voltage level on the first control line 4 and passes it on to the control unit 1 for evaluation.
In the control unit 1, the voltage level of the first control line 4 is compared with a reference value. If the voltage level deviates from the desired value, i.e. if another voltage level than was previously intended is detected on the control line 4, then immediately thereafter a signal is sent to the adjusting device 3 via the second control line 5, so that the lock 2 is unlocked. In this way, doublelocking is disabled or disengaged.
When double-locking has been deliberately enabled e.g. when the motor vehicle is parked, then the voltage level should not be monitored, because otherwise the double-lock could be disabled by external manipulation and the securing system would consequently no longer be reliable. It is therefore advantageous to monitor the first control line only when the double- locking has not been engaged. For example, it is possible to monitor first control line 4 only when the ignition is switched on. For this purpose, the control unit 1 is connected to the ignition system (not shown).
The control unit 1 can be realised as a microprocessor. The adjusting device 3 contains a final control element and a motor-, which can move the locking bars of the door lock or door locks 2, so that the doors are locked or unlocked. The monitoring unit 6 can be realised in the simplest case by a voltmeter. The monitoring unit 6 can also be arranged such that it is integrated in the microprocessor, in which case the voltage level of the first control line is supplied for evaluation to an input port of the microprocessor via an A/D-converter.
-4

Claims (7)

1. A securing system for a motor vehicle, having a locking means for locking and unlocking a motor vehicle lock and a control means comprising a first control line for controlling the locking of the locking means and a second control line for controlling the unlocking of the locking means wherein the control means compares the signal level of the first control line with a desired value, and controls the signal level of the second control line to unlock the locking means when the signal level of the first control line deviates from the desired value.
2. A securing system according to claim 1 wherein the control means also comprises a control unit, connected to the first and second control line, for controlling the locking and unlocking of the locking means, and a monitoring unit, which is connected to the first control line, wherein the monitoring unit detects the signal level on the first control line and supplies it to the control unit.
3. A securing system as claimed in claim 2, wherein the control unit is connected to the ignition system and only monitors the first control line when the ignition is switched on.
4. A security system according to any preceding claim wherein the desired signal value depends upon whether the lock was previously unlocked.
S. A securing system according to any preceding claim wherein the signals measured are voltages.
6. A securing system for a motor vehicle substantially as herein described with reference to the accompanying drawings.
7. A motor vehicle having a securing system as claimed in any preceding claim.
GB9505440A 1994-03-18 1995-03-17 Securing system for a motor vehicle Expired - Fee Related GB2287750B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4409361A DE4409361C1 (en) 1994-03-18 1994-03-18 Closure system for road vehicle

Publications (3)

Publication Number Publication Date
GB9505440D0 GB9505440D0 (en) 1995-05-03
GB2287750A true GB2287750A (en) 1995-09-27
GB2287750B GB2287750B (en) 1997-08-13

Family

ID=6513213

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9505440A Expired - Fee Related GB2287750B (en) 1994-03-18 1995-03-17 Securing system for a motor vehicle

Country Status (2)

Country Link
DE (1) DE4409361C1 (en)
GB (1) GB2287750B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2296937A (en) * 1995-01-14 1996-07-17 Daimler Benz Ag Motor vehicle security system
FR2853966A1 (en) * 2003-04-11 2004-10-22 Siemens Ag Method for increasing functional safety of e.g. centralized locking device in motor vehicle, involves detecting switching state of load in active manner, and making diagnosis independent of active excitation time of load by microcontroller

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006019714A1 (en) * 2006-04-27 2007-10-31 Siemens Ag Vehicle`s e.g. motorcycle, functional element configuration actualizing method, involves determining actual stopping area of vehicle, and updating configuration of vehicle functional element based on determined actual stopping area

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3447039C2 (en) * 1984-12-22 1986-12-04 Audi AG, 8070 Ingolstadt Central locking for motor vehicles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2296937A (en) * 1995-01-14 1996-07-17 Daimler Benz Ag Motor vehicle security system
GB2296937B (en) * 1995-01-14 1997-01-08 Daimler Benz Ag Motor vehicle security system
FR2853966A1 (en) * 2003-04-11 2004-10-22 Siemens Ag Method for increasing functional safety of e.g. centralized locking device in motor vehicle, involves detecting switching state of load in active manner, and making diagnosis independent of active excitation time of load by microcontroller

Also Published As

Publication number Publication date
GB2287750B (en) 1997-08-13
GB9505440D0 (en) 1995-05-03
DE4409361C1 (en) 1995-06-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20080317