Process for controlling a central locking system in a motor vehicle and central locking system
AssigneeMercedes-Benz AG
InventorsPeter Robitschko, Winfried Schreiber
Life of this patent
Estimating the term…
Abstract
A process and device for controlling a motor vehicle central locking system that has multiple station operation from the driver's door and from the trunk lid. A central locking of the door locks of the motor vehicle is avoided when mechanically securing the lock of the trunk lid against opening from the outside without a key in the unlocked state. This is done by switch-controlled suppression of the effect of the locking control signal normally generated when locking.
Claims24
A method of controlling a central locking system (CLS) for door locks and hinged lid locks of a motor vehicle that has multiple station operation of the CLS from a first mechanical locking station on a trunk lid and from at least one further mechanical locking station on a door, the multiple station operation being performed via a first electrical control switch assigned to the first locking station and at least a second electrical control switch which is assigned to the further locking station, each of the first and second electrical control switches being switchable via a respective locking station for the generation of unlocking and locking control signals which bring about a corresponding activation of the CLS,
- the first locking station being movable into a key-secured position by actuation via a key in a locking direction starting from an unlocked position or a neutral key withdrawal position to cause the generation of a locking control signal of the first control switch, the first control switch also being actuated when the first locking station is moved into the key-secured position, the associated lock being unlockable again by the key and not by the CLS from the key-secured position, the actuation of the first closing point in the locking direction being direction, with respect to the neutral key withdrawal position, in the opposite direction to an actuation of the first locking station in the unlocking direction, the method comprising:
- triggering a switching operation at an electrical switch assigned to the first locking station when the first locking station is actuated by the key in the unlocking direction;
- at least indirectly suppressing the effect of the locking control signal of the first control switch, which is also actuated when the first locking station is subsequently moved into the key-secured position, via a switching device cooperating with said electrical switch during the switching operation.
A central locking system (CLS) for motor vehicle door and trunk locks with multiple station operation, comprising:
- a first locking station of a trunk lid and at least a second locking station, each locking station having at least one control switch which can be switched via actuation by a key, the first locking station also having an associated lock and a lock cylinder movable via a key into a key-secured position starting from a neutral key withdrawal position, in which key-secured position the associated lock can only be unlocked by the key and not by the CLS;
- a central control circuit, coupled to the first locking station and the second locking station, and having inputs to which unlocking and locking control signals of the control switches are applied, said central control circuit at least indirectly activating lock actuators of the CLS in accordance with the locking and unlocking control signals;
- an electrical switch coupled to the first locking station and which can be switched when the first locking station is actuated in the unlocking direction;
- and
- a switching device which can be activated at least indirectly by the electrical switch and which, after being activated, suppresses at least for a limited period the effect in the central control circuit of the locking control signal generated by the control switch of the first locking station.
Dependencies are inferred from the claim text.