摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A hybrid propulsion system for a motor vehicle includes a gearbox having a gear control device and first and second shafts. The gear control device includes a first drum control device associated with the first shaft, a second drum control device associated with the second shaft and an actuation unit arranged to bring about rotation of the first and second drum control devices in a synchronized manner. The actuation unit includes a motor device, a first gear associated with the first drum control device, a second gear associated with the second drum control device, and an intermediate gear. Either of the first and second gears meshes with an output pinion of the motor device, while the intermediate gear meshes both with the first gear and with the second gear.
摘要:
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.
摘要:
A gearbox includes two coaxial primary shafts carrying fixed gearwheels acting as driving gearwheels of the gear trains associated with the forward gears and with the reverse gear, a secondary shaft carrying idle gearwheels acting as driven or intermediate gearwheels of the gear trains associated with the forward gears and with the reverse gear and a lay shaft, and a lay shaft carrying a fixed gearwheel acting as parking gearwheel. The lay shaft is permanently cinematically connected to the secondary shaft via a gear train comprising 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 first and third fixed gearwheels meshing permanently with the second idle gearwheel.
摘要:
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.
摘要:
An automotive compressor is provided having a casing defining an intake section for fluid for compression, and a delivery section for delivering the compressed fluid. An impeller is movable angularly inside the casing to increase the pressure of the fluid. A distributor is carried by the intake section of the casing to conduct the fluid for compression to the impeller. The casing and the distributor are defined by separate members connected releasably to each other.
摘要:
An automotive compressor is provided having a casing defining an intake section for fluid for compression, and a delivery section for delivering the compressed fluid. An impeller is movable angularly inside the casing to increase the pressure of the fluid. A distributor is carried by the intake section of the casing to conduct the fluid for compression to the impeller. The casing and the distributor are defined by separate members connected releasably to each other.