Patent application number | Description | Published |
20110113907 | MOTOR-VEHICLE HYBRID PROPULSION SYSTEM INCLUDING A DOUBLE-CLUTCH TRANSMISSION WITH GEAR SHIFT DEVICE COMPRISING A ROTARY DRUM - The hybrid propulsion system for an internal combustion engine having a mechanical gearbox and an electric machine. A gear shift device includes a plurality of sliding engagement sleeves, each arranged to connect a driven gearwheel for rotation with the respective secondary shaft, a corresponding plurality of sliding shift forks, each arranged to cause a respective engagement sleeve to slide between a neutral position and at least one shift position, a rotary drum having on its outer cylindrical surface a corresponding plurality of guide grooves in each of which a respective stud slidably engages for translation with a respective shift fork in the sliding direction of this latter, and an actuation unit arranged to cause the drum to rotate stepwise among a plurality of angular positions each corresponding to predetermined positions of the engagement sleeves. | 05-19-2011 |
20110113909 | GEARBOX FOR A MOTOR-VEHICLE DOUBLE CLUTCH TRANSMISSION - A gearbox includes two coaxial primary shafts, a secondary shaft and a lay shaft. The two primary shafts carry fixed gearwheels acting as driving gearwheels of the gear trains associated with the forward gears and with the reverse gear. The secondary shaft carries idle gearwheels acting as driven or intermediate gearwheels of the gear trains associated with the forward gears and with the reverse gear, and a final reduction pinion. The lay shaft carries a first idle gearwheel acting as driven gearwheel of a first gear train associated with the reverse gear, a second idle gearwheel acting as driven gearwheel of a second gear train associated with one of the forward gears, and a fixed gearwheel acting as parking gearwheel. The lay shaft is permanently kinematically connected to the secondary shaft via a third gear train having a first fixed gearwheel carried by the lay shaft, a second idle gearwheel coaxial with the two primary shafts and a third fixed gearwheel carried by the secondary shaft, the two fixed gearwheels of the third gear train meshing permanently both with the idle gearwheel of the third gear train. | 05-19-2011 |
20110113922 | MOTOR-VEHICLE DOUBLE-CLUTCH TRANSMISSION WITH GEAR SHIFT DEVICE COMPRISING A ROTARY DRUM AND MOTOR-VEHICLE HYBRID PROPULSION SYSTEM INCLUDING SUCH A TRANSMISSION - A transmission includes a first primary shaft carrying driving gearwheels associated to the odd gears and to the reverse gear, a second primary shaft coaxial to the first shaft and carrying driving gearwheels associated to the even gears, and at least one secondary shaft carrying a plurality of idle driven gearwheels directly or indirectly meshing with the driving gearwheels. The gearbox is also provided with a gear shift device having sliding engagement sleeves are each arranged to connect each time a driven gearwheel corresponding to a given gear for rotation with the respective secondary shaft. Corresponding sliding shift forks are each arranged to cause a respective engagement sleeve to slide between a neutral position and at least one shift position. A rotary drum has a corresponding guide grooves on its outer cylindrical surface in each of which a respective stud slidably engages, and is rigidly connected for translation with a respective shift fork in the sliding direction of the shift fork. An actuation unit is arranged to cause the drum to rotate stepwise among angular positions, each corresponding to predetermined positions of the engagement sleeves. The guide grooves of the drum are shaped so that in a first angular position the engagement sleeves are positioned to engage at the same time the second gear and the reverse gear. | 05-19-2011 |
20110113923 | HYBRID PROPULSION SYSTEM FOR A MOTOR VEHICLE - The propulsion system includes an internal combustion engine, an electric machine and a double-clutch transmission with a clutch unit and a mechanical gearbox. The gearbox has two coaxial primary shafts intended to be torsionally connected each to a shaft of the internal combustion engine of the motor vehicle by a respective friction clutch of the clutch unit, as well as a secondary shaft and a lay shaft arranged parallel to the two primary shafts. The electric machine is permanently kinematically connected to either of the two primary shafts via a first gear train including a pinion mounted on an output shaft of the electric machine, an intermediate gearwheel mounted on an intermediate shaft and a gearwheel mounted on the primary shaft and acting as driving gearwheel of a second gear train of the gearbox associated to one of the gears, in particular to the second forward gear. The gearbox further includes a casing and the electric machine is inserted and fixed into a seat formed by that casing. An outer surface of a stator of the electric machine forms a spiral-shaped profile which serves as cooling circuit for the electric machine and is closed on the radially outer side by an inner cylindrical surface of the seat, in such a manner that the channels of the cooling circuit are defined between the spiral-shaped profile and the inner cylindrical surface. | 05-19-2011 |
20150360554 | HYBRID POWERTRAIN UNIT FOR MOTOR VEHICLES WITH A BELT TRANSMISSION DEVICE BETWEEN ELECTRIC MACHINE AND DIFFERENTIAL - A hybrid powertrain unit comprises an engine and a gearbox device with a primary shaft that can be connected to a shaft of the engine via a clutch. The gearbox device comprises a secondary shaft with an output pinion meshing with a first crown wheel of a differential, the casing of which is rigidly connected to a casing of the gearbox device. An electric machine of the unit is configured to function as electric motor and an electric generator, having a shaft connected by a transmission to a second crown wheel of the differential. In the transmission, which is arranged between the electric machine shaft and the second crown wheel is an engagement device that can be driven via an actuator. The electric machine shaft is connected to the engine shaft on a side opposite of the gearbox device. The transmission includes a gear-reduction jump constituted by a belt transmission. | 12-17-2015 |
20150360555 | HYBRID POWERTRAIN UNIT FOR MOTOR VEHICLES WITH ENGAGEMENT DEVICES ON OPPOSITE SIDES OF THE ELECTRIC MACHINE - A hybrid powertrain unit comprises an engine and a gearbox with a primary shaft connectable to an engine shaft via a clutch and a secondary shaft with an output pinion meshing with a first differential crown wheel. An electric machine is configured to function as an electric motor and generator, having a shaft connected by a transmission to a second differential crown wheel. The transmission, arranged between the electric machine shaft and the second crown wheel includes a first engagement device. The electric machine shaft is connected to the engine shaft by a belt transmission including a belt engaged on a first pulley connected to the electric machine shaft and a second pulley connected to the engine shaft. Between the electric machine shaft and said first pulley is a second engagement device. The engagement devices are arranged coaxially with the electric machine shaft on opposite sides of the electric machine. | 12-17-2015 |
20150360556 | HYBRID POWERTRAIN UNIT FOR MOTOR VEHICLES WITH A DEVICE FOR TRANSMISSION TO A FURTHER AXLE OF THE MOTOR VEHICLE - A hybrid powertrain unit comprises an engine, and a gearbox device with a primary shaft connectable to an engine shaft via a clutch. The gearbox device comprises a secondary shaft with an output pinion meshing with a first crown wheel of a differential, the casing of which is rigidly connected to the casing of the gearbox device. The unit comprises an electric machine configured to function as an electric motor and an electric generator, having a shaft connected by a transmission to a second crown wheel of the differential. In the transmission, arranged between the electric machine shaft and the second crown wheel is an engagement device that can be driven via an actuator. The electric machine shaft is connected to the engine shaft, on a side opposite to the gearbox device. The transmission includes a gear for driving a transmission shaft connected to a further axle of the vehicle. | 12-17-2015 |
20150360557 | HYBRID POWERTRAIN UNIT FOR MOTOR VEHICLES PROVIDED WITH AUXILIARY DEVICES - A hybrid powertrain unit comprises an internal combustion engine, and a gearbox device with a primary shaft connectable to the a shaft of the engine via a clutch. The gearbox device comprises a secondary shaft with an output pinion meshing with a first crown wheel of a differential, the casing of which is rigidly connected to a casing of the gearbox device. An electric machine is configured to function as an electric motor and an electric generator, having a shaft connected by a transmission to a second crown wheel of the differential. In the transmission, arranged between the electric machine shaft and the second crown wheel of is an engagement device that can be actuator driven. The electric machine shaft is connected to the engine shaft, on a side opposite to the gearbox device by a belt transmission that controls vehicle auxiliary devices, which are mounted coaxially with respect to the electric machine. | 12-17-2015 |