Abstract: Electromagnetically-operated coupling device for selectively connecting and disconnecting a first rotating member and a second rotating member in a driveline of a vehicle is disclosed, wherein the first and the second rotating members are coaxial with each other and rotatable about a same axis of rotation. The coupling device comprises: an engagement sleeve provided with a control disk made of a ferromagnetic material, the engagement sleeve being axially slidable between an engaged position and a disengaged position; and a control system for controlling the sliding movement of the engagement sleeve between said engaged and disengaged positions. The control system comprises a pair of magnetic coils which are placed on opposite sides of the control disk, coaxially therewith, and are arranged to be selectively activated by an electric current to generate a magnetic force acting on the control disk to axially move the control disk, and therefore also the engagement sleeve, in either directions.

Abstract: Electromagnetically-operated coupling device for selectively connecting and disconnecting a first rotating member and a second rotating member in a driveline of a vehicle is disclosed, wherein the first and the second rotating members are coaxial with each other and rotatable about a same axis of rotation. The coupling device comprises: an engagement sleeve provided with a control disk made of a ferromagnetic material, the engagement sleeve being axially slidable between an engaged position and a disengaged position; and a control system for controlling the sliding movement of the engagement sleeve between said engaged and disengaged positions. The control system comprises a pair of magnetic coils which are placed on opposite sides of the control disk, coaxially therewith, and are arranged to be selectively activated by an electric current to generate a magnetic force acting on the control disk to axially move the control disk, and therefore also the engagement sleeve, in either directions.

Abstract: An electronic system comprising a system to be monitored (2) and a plurality of fault-monitoring systems (4, 6) each of which is adapted to output a fault signal when an input indicates that the electronic system is in a fault condition associated with the fault-monitoring system. The fault-monitoring systems are arranged in a cascade fashion such that a fault signal output from one fault-monitoring system (4) is provided as an input to a subsequent fault-monitoring system (6) in the cascade of fault-monitoring systems to simulate a fault condition associated with the subsequent fault-monitoring system. The output of the final fault-monitoring system in the cascade gives an indication of whether there is a fault with any of the fault-monitoring systems.

Abstract: An electronic system comprising a system to be monitored (2) and a plurality of fault-monitoring systems (4, 6) each of which is adapted to output a fault signal when an input indicates that the electronic system is in a fault condition associated with the fault-monitoring system. The fault-monitoring systems are arranged in a cascade fashion such that a fault signal output from one fault-monitoring system (4) is provided as an input to a subsequent fault-monitoring system (6) in the cascade of fault-monitoring systems to simulate a fault condition associated with the subsequent fault-monitoring system. The output of the final fault-monitoring system in the cascade gives an indication of whether there is a fault with any of the fault-monitoring systems.

Abstract: A control system for a load (10), the system comprising a first microprocessor (16) having an output to drive one side of a load (10), a second microprocessor (18) having an output to drive the other side of the load (10), the system being arranged so that when either microprocessor detects a fault in the control of the load (10) the load (10) is switched off.