Antitheft protection system for motor vehicle with ignition switch - has switching system installed in door of vehicle, operated by key outside door to switch unit generating control signal

摘要

The locking or unlocking of the door is determined according to the combination of the switched on condition of the ignition switch (2) and the switching system (3). A driver circuit (8) activates a motor (9). This operates a locking/unlocking system for the door corresp. to the control signal. The control unit can include a control circuit and a logic circuit. A supply control system (10) supplies an electric current to the drive circuit, if the ignition switch is switched off. The driver circuit is activated, depending on an output signal from the control unit (6), only if the supply control system (10) supplies the driver circuit with electric current. ADVANTAGE - Latching system works well and reliably if ignition switch is switched on.