Abstract: A control device includes an elongated mechanical transmission member (10; 110) interposed between the gearbox and a control member (100) for transmitting to the gearbox the commands imparted through the control member, in such a manner that the gear engaged by means of the gearbox is linked to the linear position of the transmission member (10; 110). The device is provided with a position sensor (26; 126) including a movable reference element (28; 128), the movement of which is univocally determined by the movement of a rigid end portion (14; 114) of the transmission member (10; 110), and a stationary detection element (30) for detecting the position of the reference element (28; 128).

Abstract: A control device includes an elongated mechanical transmission member (10; 110) interposed between the gearbox and a control member (100) for transmitting to the gearbox the commands imparted through the control member, in such a manner that the gear engaged by means of the gearbox is linked to the linear position of the transmission member (10; 110). The device is provided with a position sensor (26; 126) including a movable reference element (28; 128), the movement of which is univocally determined by the movement of a rigid end portion (14; 114) of the transmission member (10; 110), and a stationary detection element (30) for detecting the position of the reference element (28; 128).

Abstract: The control device comprises an elongated mechanical transmission member (10; 110) interposed between the gearbox and a control member (100) for transmitting to the gearbox the commands imparted through the control member, in such a manner that the gear engaged by means of the gearbox is linked to the linear position of the transmission member (10; 110). The device is provided with a position sensor (26; 126) comprising a movable reference element (28; 128), the movement of which is univocally determined by the movement of a rigid end portion (14; 114) of the transmission member (10; 110), and a stationary detection element (30) for detecting the position of the reference element (28; 128). The reference element (28; 128) is mechanically connected to the rigid end portion (14; 114) and spaced apart from it.

Abstract: The control device comprises an elongated mechanical transmission member (10; 110) interposed between the gearbox and a control member (100) for transmitting to the gearbox the commands imparted through the control member, in such a manner that the gear engaged by means of the gearbox is linked to the linear position of the transmission member (10; 110). The device is provided with a position sensor (26; 126) comprising a movable reference element (28; 128), the movement of which is univocally determined by the movement of a rigid end portion (14; 114) of the transmission member (10; 110), and a stationary detection element (30) for detecting the position of the reference element (28; 128). The reference element (28; 128) is mechanically connected to the rigid end portion (14; 114) and spaced apart from it.

Abstract: The device (10) comprises an electric motor (12), a reduction gear (14), a shaft (16) operable by the motor (12) via the reduction gear (14), and a drum (18) mounted on the shaft (16) so as to be connected for rotation therewith but free to slide axially relative thereto. The drum (18) has on its cylindrical lateral surface a first groove (20) in which first studs (22) drivingly connected for translation each with a respective shift fork (24) are guided, whereby the rotational movement of the drum (18) is converted into a translational movement of the studs (22), and hence of the forks (24), to bring about the engagement of the gears. The drum (18) also has a second groove (40) in which a second, axially stationary stud (42) engages.

Abstract: The control device comprises an electric motor, a reduction gear, a shaft operable by the electric motor via the reduction gear, and a drum mounted on the shaft so as to be connected for rotation therewith but free to slide axially relative thereto. The drum has on its cylindrical lateral surface a guide groove in which a plurality of studs are guided, each of the studs being drivingly connected for translation with a respective shift finger in such a manner that the rotary motion of the drum is converted into the translational motion of the shift fingers to control the engagement of the gears according to predetermined modes of operation. The control device further comprises a locking device arranged to lock the translational motion of the drum during the synchronization and gear engagement phases and to unlock the translational motion of the drum upon completion of the engagement of the gear.

Abstract: The device comprises: an actuator unit arranged to apply a tension force on a pair of operating cables provided with a sheath; and a force sensing unit for providing a signal indicative of the force applied the sheath by either of the two operating cables (12a). The force sensing unit comprises: a pack of Belleville springs coupled to an end portion of the sheath and arranged to deform as a result of the tension force applied by the actuator unit on the operating cable; and a Hall position sensor for detecting the displacement of the end portion of the sheath as a result of the deformation of the pack of springs.

Abstract: An interface circuit is described for use between a direct-current voltage source and a circuit for the pulsed driving of a load such as an electric motor, in parallel with which at least one high-capacitance capacitor is connected, the interface circuit comprising a MOSFET transistor connected to a control circuit suitable for driving the transistor in accordance with predetermined procedures. The interface circuit comprises a first supply terminal and a second supply terminal which are intended operatively to be connected to the voltage source, permanently and temporarily, respectively.

Abstract: The device comprises: an actuator unit arranged to apply a tension force on a pair of operating cables provided with a sheath; and a force sensing unit for providing a signal indicative of the force applied the sheath by either of the two operating cables (12a). The force sensing unit comprises: a pack of Belleville springs coupled to an end portion of the sheath and arranged to deform as a result of the tension force applied by the actuator unit on the operating cable; and a Hall position sensor for detecting the displacement of the end portion of the sheath as a result of the deformation of the pack of springs.

Abstract: The device comprises: a rotary drive motor, a speed reducer of epicyclic type including an input shaft, and output shaft and a rotatable outer body coaxial with the input and output shafts and with which is associated a resilient biasing member operable to oppose its rotation; the input shaft being coupled for rotation to the motor output shaft and having an output shaft coupled operatively to a load; an electric transducer operable to provide signals indicative of the magnitude of the load applied to the output shaft of the speed reducer; and a control and command unit arranged to pilot the motor (2) in a predetermined manner.

Abstract: The actuator comprises an electric motor, a reduction unit and a mechanism for converting the rotary movement driven by the motor into the reciprocating rectilinear motion of a driven member for transmitting its movement to a slider or plunger housed in a hydraulic cartridge for supplying a hydraulic actuator intended to operate the clutch of a motor vehicle. The motion conversion mechanism includes a cam-type operating member rotated by the motor through the reduction unit and acting on the driven member. The cam member has a profile comprising, in succession, a first portion designed to cause the disengagement of the clutch, a second portion designed to keep the clutch in the disengaged position, and a third portion designed to cause the engagement of the clutch.

Abstract: The system is operable to control a robotized gearbox which includes control levers which can be displaced along at least one working line along which a plurality of nominal operating positions are defined which correspond to the speed ratios or gears and to a neutral position. The control system includes electro-mechanical actuators coupled to the control levers and operable to displace them along the said at least one working line, and an electronic control unit operable to control these actuators to operate in a predetermined manner, so as to position the control levers selectively in one of the operating positions. The control levers have associated sensors operable to supply the control unit with signals which together indicate that the levers have reached predetermined positions along the said at least one operating line.

Abstract: The system is operable to control a robotized gearbox which includes control levers which can be displaced along at least one working line along which a plurality of nominal operating positions are defined which correspond to the speed ratios or gears and to a neutral position.

Abstract: An interface circuit is described for use between a direct-current voltage source and a circuit for the pulsed driving of a load such as an electric motor, in parallel with which at least one high-capacitance capacitor is connected, the interface circuit comprising

Abstract: A piloting circuit comprises a circuit branch which is intended to be connected to a DC voltage supply source in such a way as to receive a voltage of predetermined polarity, and in which the drain-source path of a (first) MOSFET transistor intended to receive an on-off piloting signal on its gate is connected in series with the load, a current recirculation diode connected in parallel to the load, and protection devices operable to prevent damage to the MOSFET transistor and/or the diode in the event of polarity reversal of the supply voltage. The protection function is achieved of an electronic switch disposed in series with the recirculation diode and piloted in such a way as to prevent the passage of current in this diode if a supply voltage of reversed polarity with respect to the predetermined polarity is applied to the said circuit branch.

Abstract: The system comprises a pressure sensor for providing a signal indicative of the pressure of the refrigerant fluid of the air-conditioning system at the output or delivery of the compressor of the system, a sensor for detecting the temperature of the liquid flowing through the engine-cooling system (R), an activation sensor for providing a signal when the air-conditioning system is activated, a sensor for detecting the speed of forward movement of the motor vehicle, and a control and operating unit connected to the sensors and to the electric motor and arranged for: determining a first speed for the electric motor in accordance with a function of the pressure of the refrigerant fluid of the air-conditioning system and of the speed of the vehicle, determining a second speed for the electric motor in accordance with a function of the temperature of the engine-coolant liquid and of the speed of forward movement of the vehicle, and sending to the electric motor control signals to bring its speed of rotation to

Abstract: The process makes it possible to detect the speed of rotation of a DC electric motor comprised of at least one winding connectable to a DC voltage supply source via an electronic switch with which there is associated a control circuit operable to provide a pulse width modulated square-wave control signal. The process comprises the operation of interrupting the application of the said control system to the electronic switch for a time period of pre-determined duration, acquiring during this time period a signal correlated to the voltage on the said winding and detecting at least one pre-determined characteristic of this signal in dependence on the speed of rotation of the motor.