Abstract: The problem addressed by the invention is that of being to switch a motor vehicle lock from normal operation to emergency or disruption operation within an especially short time and/or with the least possible expenditure of electrical energy. This problem is solved in that a lock for a motor vehicle having a lock mechanism and an electric drive is provided such that the lock can be electrically opened in normal operation. The lock has an additional operating state, called disrupted operation. In disrupted operation, the lock can be opened mechanically, which is not possible in normal operation. The lock comprises a mechanical energy accumulator for switching the lock from normal operation to disrupted operation.

Abstract: The object of the invention is to be able, with little expenditure of electrical energy and within a short time, to change over a lock, which can be opened electrically, such that said lock can also be opened mechanically. To achieve this, a locking device with a lock, in particular for a motor vehicle, is provided with a locking mechanism, the rotary latch of which can be latched to at least one pawl in a main latching position and in a preliminary latching position. The locking device has an electric drive with which the lock can be opened electrically in normal operation. It furthermore has an actuating device with which the lock can be changed over from normal operation to emergency operation in the event of an emergency. During this changeover, the lock is adjusted from the main latching position into the preliminary latching position, and the lock can be opened mechanically in said preliminary latching position.

Abstract: The invention relates to a motor vehicle door comprising a door leaf with a drive, a magnetic device as a component of the drive, and at least one sensor which is associated with the door leaf. According to the invention, said magnetic device also comprises a magnetorheological element and/or a magnetohydrodynamic element which can be actuated by at least one magnet.

Abstract: The problem addressed by the invention is that of being to switch a motor vehicle lock from normal operation to emergency or disruption operation within an especially short time and/or with the least possible expenditure of electrical energy. This problem is solved in that a lock for a motor vehicle having a lock mechanism and an electric drive is provided such that the lock can be electrically opened in normal operation. The lock has an additional operating state, called disrupted operation. In disrupted operation, the lock can be opened mechanically, which is not possible in normal operation. The lock comprises a mechanical energy accumulator for switching the lock from normal operation to disrupted operation.

Abstract: The object of the invention is to be able, with little expenditure of electrical energy and within a short time, to change over a lock, which can be opened electrically, such that said lock can also be opened mechanically. To achieve this, a locking device with a lock, in particular for a motor vehicle, is provided with a locking mechanism, the rotary latch of which can be latched to at least one pawl in a main latching position and in a preliminary latching position. The locking device has an electric drive with which the lock can be opened electrically in normal operation. It furthermore has an actuating device with which the lock can be changed over from normal operation to emergency operation in the event of an emergency. During this changeover, the lock is adjusted from the main latching position into the preliminary latching position, and the lock can be opened mechanically in said preliminary latching position.

Abstract: The invention relates to a motor vehicle door comprising a door leaf with a drive, a magnetic device as a component of the drive, and at least one sensor which is associated with the door leaf. According to the invention, said magnetic device also comprises a magnetorheological element and/or a magnetohydrodynamic element which can be actuated by at least one magnet.