Abstract: It is hereby disclosed an apparatus for and a method of writing software objects into a rewritable nonvolatile memory of an electronic control unit of an internal combustion engine, wherein the method comprises: receiving an access request from a memory writing device, generating a seed code, transmitting the seed code to the memory writing device, generating a first key code on the basis of the seed code and a first identification code, generating a second key code on the basis of the seed code and a second identification code, receiving a reference key code from the memory writing device, comparing the reference key code with the first key code and/or with the second key code, and enabling the memory writing device to write software objects into the rewritable nonvolatile memory, if the reference key code corresponds to the first key code or to the second key code.

Abstract: A pressuring system for a vehicle engine includes an intake manifold into which ambient gases flows. A control valve connects to the intake manifold. An engine block connects to the intake manifold and connected to a gases outlet. A timing belt cover connects to the engine block. A gases pipe connects between the control valve and the timing belt cover.

Abstract: A device for controlling the speed of an internal combustion engine comprising a control lever movably associated to a support element, which may be the engine casing or a portion thereof. The control lever is moveable at least between a first position, in which the engine is at a first rotation regime, and a second position, in which the engine is at a second rotation time. A selective locking mechanism is provided that prohibits the control lever from being stably positioned at any (and all) intermediate positions between the first and second positions. In one embodiment, a biasing force generated by the device automatically forces the control lever into one of the first or second positions when the control lever is located in any of the intermediate positions and an actuation force is ceased.

Abstract: An intake manifold (2) of comburent air is provided for an internal combustion engine (1) with a recirculating conduit (60) of exhaust gases. The intake manifold (2) includes a first inlet mouth (213) of the comburent air, a second inlet mouth (214) in communication with the recirculating conduit (60) of the exhaust gases, and a plurality of outlet mouths (201), having a wall (7) positioned in front of each of the outlet mouths (201) and suitable for dividing the internal volume of the intake manifold (2) into two chambers (215, 204), the first chamber (215) being placed in communication with the first inlet mouth (213) and the second inlet mouth (214) and the second chamber (204) being placed in communication with the outlet mouths (201), the wall (7) defining an opening (70) suitable for placing the first chamber (215) and the second chamber (204) in communication.

Abstract: An auxiliary air-conditioning system for a motor vehicle, in particular a truck comprising a tractor provided with a driving cab and possibly a sleeper compartment, and a primary air-conditioning system connected to the main engine and to the battery of the truck. The auxiliary air-conditioning system is totally independent of the primary air-conditioning system of the truck and is formed by an external unit designed to be set on the outside of the driving cab and/or of the sleeper compartment, and by at least one heat-exchange unit, which is hydraulically and electrically connected to the external unit and is designed to be set inside the driving cab and/or inside the sleeper compartment.

Abstract: An intake manifold (2) of comburent air is provided for an internal combustion engine (1) with a recirculating conduit (60) of exhaust gases. The intake manifold (2) includes a first inlet mouth (213) of the comburent air, a second inlet mouth (214) in communication with the recirculating conduit (60) of the exhaust gases, and a plurality of outlet mouths (201), having a wall (7) positioned in front of each of the outlet mouths (201) and suitable for dividing the internal volume of the intake manifold (2) into two chambers (215, 204), the first chamber (215) being placed in communication with the first inlet mouth (213) and the second inlet mouth (214) and the second chamber (204) being placed in communication with the outlet mouths (201), the wall (7) defining an opening (70) suitable for placing the first chamber (215) and the second chamber (204) in communication.

Abstract: An auxiliary air conditioning system (7) for a motor vehicle (1), comprising a first heat exchanger (17) adapted to be installed inside a passenger compartment (4) of the motor vehicle and an external unit (43) comprising an auxiliary engine (8), an auxiliary compressor (12) driven by the auxiliary engine (8) and a second exchanger (17). The system comprises a switching valve (20) for selectively setting a first refrigerating cycle operating mode in which the first heat exchanger (17) serves as an evaporator and the second heat exchanger (14) serves as a condenser, and a second heat pump operating mode, in which the first heat exchanger (17) serves as a condenser and the fluid of the second heat exchanger (14) is cut off and the operative fluid is allowed to flow through a heating device (30) to receive thermal power independently from the outside environment temperature.

Abstract: An auxiliary power system for a vehicle, having an auxiliary internal combustion engine with a starter is described. An auxiliary alternator driven by the auxiliary engine and connected to a battery of the vehicle and a control unit, which is connected to the battery, and activates the starter of the auxiliary engine in the event the voltage of the battery is below a reference value, may be included.

Abstract: An auxiliary power system (7) for a vehicle (1), having an auxiliary internal combustion engine (8) with a starter (34); an auxiliary alternator (9) driven by the auxiliary engine (8) and connected to a battery (6) of the vehicle; and a control unit (41), which is connected to the battery, and activates the starter (34) of the auxiliary engine (8) in the event the voltage of the battery (6) is below a reference value.

Abstract: An auxiliary air-conditioning system for a motor vehicle, in particular a truck comprising a tractor provided with a driving cab and possibly a sleeper compartment, and a primary air-conditioning system connected to the main engine and to the battery of the truck. The auxiliary air-conditioning system is totally independent of the primary air-conditioning system of the truck and is formed by an external unit designed to be set on the outside of the driving cab and/or of the sleeper compartment, and by at least one heat-exchange unit, which is hydraulically and electrically connected to the external unit and is designed to be set inside the driving cab and/or inside the sleeper compartment.

Abstract: A continuously variable transmission including an input shaft; a flywheel connected to the input shaft; a drive pulley connected to the input shaft and defined by a first and a second half-pulley defining a groove of variable width for a belt; and a centrifugal actuating assembly having a centrifugal actuating device, which activates above a first threshold value of the angular speed of the input shaft to connect the drive pulley to the flywheel by a clutch interposed between the first half-pulley and the flywheel, and a speed regulating device, which is active above a second threshold value of the angular speed of the input shaft to adjust the width of the groove of the drive pulley, and therefore the work diameter of the belt.

Abstract: A pulley for a continuously-variable-ratio drive, having a fixed half-pulley fitted to a shaft of the drive; a movable half-pulley mounted to slide axially with respect to the fixed half-pulley to define with it a V groove of variable size for a V belt; and a torque-sensitive, axial thrust compensating device having an acceleration cam and a deceleration cam, which are interposed between the fixed half-pulley and the movable half-pulley to generate thrust on the movable half-pulley in the compression direction of the belt in response to both a drive torque and a braking torque.

Abstract: A continuously-variable-ratio drive, having an input shaft; a flywheel integral with the input shaft; a drive pulley idle with respect to the input shaft and defined by two half-pulleys defining a groove of variable size for a V belt; and a centrifugal control assembly. The control assembly has a centrifugal actuating device which intervenes above a first threshold value of the angular speed of the input shaft to connect the drive pulley angularly to the flywheel by means of a friction clutch; and a speed adjusting device which is active over a second threshold value of the angular speed of the input shaft to adjust the size of the groove of the drive pulley and therefore the work diameter of the belt.

Abstract: A continuously variable transmission having an input shaft; a flywheel integral with the input shaft; a drive pulley idle with respect to the input shaft and defined by a first and second half-pulley defining a groove of variable width for a V belt; and a centrifugal actuating assembly having a centrifugal actuating device, which intervenes above a first threshold value of the angular speed of the input shaft, so as to connect the drive pulley angularly to the flywheel by means of a clutch interposed between the first half-pulley and the flywheel, and a speed regulating device, which is active above a second threshold value of the angular speed of the input shaft to adjust the width of the groove of the drive pulley, and therefore the work diameter of the belt. The actuating device has push means which exert axial thrust on the first half-pulley at each speed value of the input shaft above the first threshold value.

Abstract: A driven unit for a continuously-variable-ratio drive, having a fixed half-pulley assembly having a fixed half-pulley connected to an output member of the drive; a movable half-pulley assembly having a movable half-pulley mounted to slide axially with respect to the fixed half-pulley to form with it a V-shaped groove of variable width for a V-shaped belt; and a spring which forces the half-pulleys towards each other to keep the half-pulleys in contact with the belt; the fixed half-pulley assembly has one or more threaded through axial holes in which to screw respective screws, which cooperate with an annular surface axially facing the holes in the fixed half-pulley assembly to exert thrust on the surface and part the half-pulleys in opposition to the spring.

Abstract: A continuously-variable-ratio drive, having an input shaft; a flywheel integral with the input shaft; a drive pulley idle with respect to the input shaft and defined by two half-pulleys defining a groove of variable size for a V belt; and a centrifugal control assembly. The control assembly has a centrifugal actuating device which intervenes above a first threshold value of the angular speed of the input shaft to connect the drive pulley angularly to the flywheel by means of a friction clutch; and a speed adjusting device which is active over a second threshold value of the angular speed of the input shaft to adjust the size of the groove of the drive pulley and therefore the work diameter of the belt.

Abstract: The drive assembly has: an input member and an intermediate shaft; an axial clutch device for connecting the input member and the intermediate shaft in rotary manner; and a pulley connected in rotary manner to the intermediate shaft and defined by two half-pulleys movable axially with respect to each other and engaging a drive belt, the distance between the half-pulleys determining the winding radius of the belt. A push member, movable axially, along the intermediate shaft, between two limit positions, exerts thrust on the two half-pulleys to determine, in direct relation with its own axial position, the axial distance between the two half-pulleys, and alternatively exerts thrust on the clutch device to release the clutch device when moved axially in the direction increasing the distance between the half-pulleys. A control device is also provided to vary, on command, the axial position of the push member.

Abstract: The assembly includes an input member having a radial surface and fitted integrally with a coaxial drive shaft; and a pulley fitted coaxially to and idle with respect to the drive shaft and having two half-pulleys connected to each other to rotate integrally and move axially with respect to each other, and which engage a drive belt. There is also provided a thrust-clutch member, which is connected to the drive shaft so as to rotate integrally with and move axially with respect to the drive shaft, and is located adjacent to the second half-pulley.

Abstract: The drive assembly has: an input member and an intermediate shaft; an axial clutch device for connecting the input member and the intermediate shaft in rotary manner; and a pulley connected in rotary manner to the intermediate shaft and defined by two half-pulleys movable axially with respect to each other and engaging a drive belt, the distance between the half-pulleys determining the winding radius of the belt. A push member, movable axially, along the intermediate shaft, between two limit positions, exerts thrust on the two half-pulleys to determine, in direct relation with its own axial position, the axial distance between the two half-pulleys, and alternatively exerts thrust on the clutch device to release the clutch device when moved axially in the direction increasing the distance between the half-pulleys. A control device is also provided to vary, on command, the axial position of the push member.